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1
Mičulka, Martin. „Detekce nápravy v systému vážení za jízdy“. Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2021. http://www.nusl.cz/ntk/nusl-442430.
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This master's thesis deals with the Weight in Motion systems (WIM). The main goal is to create simulation software that detects dual tires assembly with respect to the angle with which the sensor is embedded into the road. Thesis also contains literature search of available solutions of weighing systems and the sensors which are used in these systems. Subsequently, the thesis contains software for recognizing simple assembly or dual tires assembly from real measured data. Software solutions were developed using programming language Python v3.7. All source codes were developed in PyCharm Community Edition 2020.
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Hallam, Robert Kenneth. „Dual optical detection and multivariate analysis“. Thesis, Loughborough University, 2003. https://dspace.lboro.ac.uk/2134/33747.
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The application of flow injection analysis into the simultaneous determination of two or more components has been challenging for many years. Various detectors such as ultraviolet/visible absorption, fluorescence, and electrochemical detectors, have been used individually or in combination with each other. Combining two optical detectors such as fluorescence and ultraviolet/visible absorbance, however, has always been challenging due to their incompatibilities. However, the recent developments in fibre optics, solid-state light sources and miniaturised charged coupled devices (CCD), allow novel designs and most of the incompatibilities be circumvented. A flow injection manifold can now be adapted so that only one flow cell is used along with a diode array CCD detector that can detect both fluorescence and absorbance simultaneously. The initial development and testing of such dual detection system is described in this thesis.
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Fronk, Ryan G. „Dual-side etched microstructured semiconductor neutron detectors“. Diss., Kansas State University, 2017. http://hdl.handle.net/2097/35426.
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Doctor of PhilosophyDepartment of Mechanical and Nuclear Engineering
Douglas S. McGregor
Interest in high-efficiency replacements for thin-film-coated thermal neutron detectors led to the development of single-sided microstructured semiconductor neutron detectors (MSNDs). MSNDs are designed with micro-sized trench structures that are etched into a vertically-oriented pvn-junction diode, and backfilled with a neutron converting material, such as ⁶LiF. Neutrons absorbed by the converting material produce a pair of charged-particle reaction products that can be measured by the diode substrate. MSNDs have higher neutron-absorption and reaction-product counting efficiencies than their thin-film-coated counterparts, resulting in up to a 10x increase in intrinsic thermal neutron detection efficiency. The detection efficiency for a single-sided MSND is reduced by neutron streaming paths between the conversion-material filled regions that consequently allow neutrons to pass undetected through the detector. Previously, the highest reported intrinsic thermal neutron detection efficiency for a single MSND was approximately 30%. Methods for double-stacking and aligning MSNDs to reduce neutron streaming produced devices with an intrinsic thermal neutron detection efficiency of 42%. Presented here is a new type of MSND that features a complementary second set of trenches that are etched into the back-side of the detector substrate. These dual-sided microstructured semiconductor neutron detectors (DS-MSNDs) have the ability to absorb and detect neutrons that stream through the front-side, effectively doubling the detection efficiency of a single-sided device. DS-MSND sensors are theoretically capable of achieving greater than 80% intrinsic thermal neutron detection efficiency for a 1-mm thick device. Prototype DS-MSNDs with diffused pvp-junction operated at 0-V applied bias have achieved 53.54±0.61%, exceeding that of the single-sided MSNDs and double-stacked MSNDs to represent a new record for detection efficiency for such solid-state devices.
4
Lineberger, Ernest R. „Bubble detection using a dual frequency sound field“. Thesis, Monterey, California. Naval Postgraduate School, 1988. http://hdl.handle.net/10945/22932.
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5
Dutch, A. D. „Pulse fluorometry using a dual detection channel instrument“. Thesis, University of Strathclyde, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.372089.
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6
Hakenberg, Sydney [Verfasser], und Gerald A. [Akademischer Betreuer] Urban. „A microfluidic dual chip system for rapid pathogen detection“. Freiburg : Universität, 2015. http://d-nb.info/1119328152/34.
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7
Wu, Zecai. „Enantiomeric purity determination using dual polarimetric and absorbance detection“. Thesis, University of York, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.306467.
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8
Mather, Luke. „Dual-phase side-channel evaluations : leakage detection and exploitation“. Thesis, University of Bristol, 2015. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.687064.
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Side-channel analysis may be used by an adversary to recover secret information from some form of environmental data emitted by a cryptographic device or application. In this thesis, we discuss some of the challenges faced by evaluation bodies attempting to certify the resistance of devices and applications to side-channel attacks, with relevance to the development of the Common Criteria version 3.1 and FIPS 140-3 standardisation documents. We separate this question into two components: identifying the presence of information leakage in a detection phase, and determining the exact level of the resistance of a device in an exploitation phase. We explore these two components when applied to information leakage in cryptographic hardware and networked web applications. For the detection phase, we demonstrate how various hypothesis tests can be used to reliably detect the presence of information leakage, either as part of a "pass or fail" style approach or to identify instances of leakage warranting further investigation. For the exploitation phase, we present a novel method for combining the results of multiple differential power analysis attacks, finding that in some cases we can dramatically increase the success rate of an adversary using the same data set. We also focus on the implications of the growth in high-performance computing technologies on the evaluation processes, demonstrating that dramatic decreases in the running time of common algorithms can be achieved using modern general purpose graphics processing unit devices and a pipelined architecture. This suggests that the efficiency of the implementation of an attack should be of concern to side-channel evaluators and researchers.
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Roberts, Stefan Ross. „Non-intrusive knock detection in a turbocharged, dual fuel engine“. Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp05/mq22664.pdf.
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10
M, Dube Chad. „Dual-process theory and syllogistic reasoning a signal detection analysis /“. Amherst, Mass. : University of Massachusetts Amherst, 2009. http://scholarworks.umass.edu/theses/242/.
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11
Östling, Johan. „High Accuracy Speed and Angular Position Detection by Dual Sensor“. Thesis, Uppsala universitet, Fasta tillståndets fysik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-365726.
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For many decades there has been a need in many industries to measure speed and position of ferrous gears. This is commonly done by converting passing gear teeth from trigger wheels to electrical impulses to calculate speed and angular position. By using Hall effect sensors or Giant Magnetoresistance sensors (GMR), a zero speed detection of gear teeth is possible while at the same time be cheap to produce and durable for harsh environments. A specially designed trigger-wheel (cogwheel created for measurements) with gear teeth in a specific pattern, exact position can be detected by using a dual sensor, even when no earlier information is available. The new design of trigger-wheel also makes this new method more accurate and universal compared to previous solutions. This thesis demonstrates and argues for the advantages of using a dual sensor for speed and angular position detection on gear wheels. Were one sensor do quantitative measurements for pattern detection in the teeth arrangements and the other sensor do qualitative measurements for position detection.
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Vempati, Venkata Surya Raghuram. „Remote detection of hydrogen leak using Nd:YAG pulsed laser induced dual line detection Rayleigh light scattering“. [Gainesville, Fla.] : University of Florida, 2005. http://purl.fcla.edu/fcla/etd/UFE0008640.
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13
VEPADHARMALINGAM, MURALIMANOHAR. „DESIGN OF A DUAL WORKING ELECTRODE POTENTIOSTAT FOR REMOTE BIOSENSORS“. University of Cincinnati / OhioLINK, 2000. http://rave.ohiolink.edu/etdc/view?acc_num=ucin973170579.
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14
Almqvist, Ylva. „Nedbrytning av vägar: Jämförelse mellan axlar med singel- respektive tvillingmontage“. Thesis, KTH, Transportvetenskap, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-45983.
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When designing roads it’s important to know what loads will be driven on it. The axles on heavy vehicles can either have super single tires or dual tires which, according to studies, damage the roads differently. The Swedish Transport Administration is developing an understanding for the character of these different kinds of axle and tire types on the loads induced on Swedish roads. In this thesis a field study was conducted to determine the distribution between axles with super single tires and axles with dual tires on heavy vehicles. A highway, a country road and a national road were investigated during the study. The result showed that the number of trucks with single tire axles, i.e. those with super single tires, varies between 39 and 48 percent on the different types of road. That the truck has a single tire axle means that the truck has at least one axle with single tires in addition to the steering axle. A small study was conducted to determine the width of tires on heavy vehicles. A comparison of trucks with single- and dual tire axles was carried out in terms of degradation of the roads. Permanent deformation of unbound layers and fatigue cracking were investigated since these degradation mechanisms are currently used as design parameters in the design of roads. Load values from Bridge Weight In Motion (BWIM) data were used in the calculations and vehicle type 113, 123 and 12211 were investigated. Permanent deformation and fatigue cracking were calculated according to the criteria given in ATB VÄG 2005. Dissipated Creep Strain Energy (DCSE) has been calculated for the selected truck types. The study showed that trucks with axles with single tires accelerate the degradation of the roads. The permanent deformation was almost the same for the two different kinds of axle types.
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Tate, Tyler, und Tyler Tate. „Dual Modality Optical Coherence Tomography and Multispectral Fluorescence Imaging for Ovarian Cancer Detection“. Diss., The University of Arizona, 2017. http://hdl.handle.net/10150/623156.
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Ovarian cancer is the deadliest gynecologic cancer for women. Diagnosis at the local stage leads to 91% 5-year survival rates, but only 15% of cases are detected early. Existing screening methods have proven ineffective in large clinical trials. Screening is complicated by the heterogeneity of the disease with multiple types of ovarian cancer originating both on the ovary and in the fallopian tube. Early stage cancer is too subtle for non-invasive imaging techniques such as ultrasound or magnetic resonance imaging. This study evaluates the feasibility and design of dual modality, multispectral fluorescence imaging (MFI) and optical coherence tomography (OCT) endoscopes for improved ovarian cancer screening. The study is broken up into three sections. In the first study MFI is validated in an ex vivo imaging study of human ovarian and fallopian tube tissue samples. Tissue autofluorescence excited by ultraviolet and blue wavelengths is shown to be a promising discriminator between normal and cancerous tissue. The second study combines OCT and MFI into a sub millimeter diameter endoscope designed to screen for ovarian cancer by screening inside the fallopian tube and at the ovary. The small size is required for screening the full length of the fallopian tube. MFI is implemented as a wide-field navigational imaging technique with high sensitivity complemented by high resolution structural depth imaging of OCT over a limited field of view. The final study presents a novel lens design for a scanning fiber endoscope with forward-viewing navigation and side-viewing OCT. A piezo tube is used to scan an optical fiber providing both the navigation channel’s illumination and OCT imaging. The design spatially separates the forward-viewing illumination from the OCT. As the piezo fiber circularly scans at its maximum deviation the OCT beam focus is rotationally scanned out the side of the endoscope tip by a rotationally symmetric double reflection in the cover plate.
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Kaldirim, Melih. „Dual And Single Color Mid-wavelength Infrared Quantum Well Photodetectors“. Master's thesis, METU, 2008. http://etd.lib.metu.edu.tr/upload/2/12609900/index.pdf.
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Quantum Well Infrared Photodetector (QWIP) technology is promising for the development of large format low cost single and dual/multi color infrared sensor arrays. Thanks to the mature III-V semiconductor technology, QWIP focal plane arrays (FPAs) provide high uniformity and excellent noise equivalent temperature difference (NETD) in both long wavelength infrared (LWIR 8-12 
m) and mid wavelength infrared (MWIR 3-5 &
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m) bands. This thesis work focuses on the development of large format single and dual color MWIR QWIP FPAs. For single band MWIR detection, we report QWIP FPAs on InP substrate as an alternative to the GaAs based MWIR QWIPs suffering from the degrading effects of lattice mismatched epitaxy. In the course of this work, epitaxial growth conditions of the device structure were optimized and 640×
512 AlInAs/InGaAs QWIP FPAs on InP substrate have been fabricated yielding NETD of 22 mK (f/1.5) and background limited performance (BLIP) temperature as high as 115 K In the second part, we report the first voltage tunable 640×
512 dual color MWIR QWIP FPA. After optimizing epitaxial growth of AlGaAs/InGaAs material system, we have designed and implemented the device structure to yield voltage tunable spectral response in two different windows in the MWIR band. The FPA provides NETDs of 60 and 30 mK (f/1.5) in colors 1 and 2. The results are very encouraging for the development of low cost dual/multi color FPAs since our approach utilizes one In bump per pixel allowing fabrication of dual color FPAs with the same process steps for single color FPAs.
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Onyper, Serge V. „Dual-process signal detection theory in item recognition: evidence for some-or-none recollection /“. Related electronic resource:, 2007. http://proquest.umi.com/pqdweb?did=1407689661&sid=1&Fmt=2&clientId=3739&RQT=309&VName=PQD.
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18
Delker, Thomas. „Demonstration of a prototype dual-recycled cavity-enhanced Michelson interferometer for gravitational wave detection“. [Gainesville, Fla.] : University of Florida, 2001. http://etd.fcla.edu/etd/uf/2001/ank7103/DelkerThesis.v5.pdf.
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Thesis (Ph. D.)--University of Florida, 2001.Title from first page of PDF file. Document formatted into pages; contains x, 163 p.; also contains graphics. Vita. Includes bibliographical references (p. 160-162).
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Chen, Feixiong. „Dual functionalization of magnetic nanoparticles by electroactive molecules and antibodies for platelet antigens detection“. Thesis, Lyon, 2017. http://www.theses.fr/2017LYSEC033/document.
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Ce travail de thèse s’inscrit dans un projet plus large qui vise à développer avec le laboratoire Ampère et l’Etablissement Français du Sang un microsystème capable de réaliser un phénotypage plaquettaire pour le diagnostic de la thrombopénie néonatale. Ce microsystème doit permettre d’isoler les plaquettes du sang total et de détecter les antigènes plaquettaires présents à leur surface. L’isolation des plaquettes se fera grâce à un module de magnétophorèse et un module de diélectrophorèse. La détection sera électrochimique. Le cœur de ce travail de thèse a donc consisté à développer des nanoparticules magnétiques pour le module de magnétophorèse. Ces nanoparticules doivent permettre la capture spécifique des plaquettes et servir de marqueur pour la détection électrochimique. Pour ce faire, des nanoparticules magnétiques ont donc été doublement fonctionnalisées en une seule étape avec un anticorps anti-CD32 dirigé contre l’antigène CD32 présent à la surface des plaquettes et avec une molécule électroactive. Après optimisation des différents paramètres de greffage, les propriétés électrochimiques de ces particules ont été caractérisées. Leurs propriétés de bioreconnaissance ont été testées sur l’antigène purifié puis sur plaquettes entières. Enfin la faisabilité de la manipulation des structures nanoparticules/plaquettes par magnétophorèse avec des micro-aimants a été démontréeFetal/neonatal alloimmune thrombocytopenia (F/NAIT) represents a great threat to new-borns or fetus. It occurs when a woman becomes alloimmunized against fetal platelet antigens. With the aim to improve fetal and neonatal survival, in collaboration with Ampere Laboratory and Etablissement Français du Sang, we plan at developing a Point-of-Care (POC) platform for platelet phenotyping. The final POC microsystem will be able to perform magnetophoresis and dielectrophoresis for platelets isolation from whole blood, and their selective electrochemical detection allowing for their phenotyping. The development of nanoparticles (NPs) with magnetic, electrochemical and bio-selection properties is a key issue. Herein, we have focused on the elaboration of magnetic NPs bearing 1) anti-CD32 antibody for specific interaction with CD32 antigen, which is present at the surface of platelets and 2) ferrocene carboxylic acid, an electroactive molecule for detection. To achieve this, the coupling reactions of this electroactive molecule and this antibody were optimized and a one-pot reaction for double functionalization was developed. The bioactivity of the immobilized antibody was tested at the molecular and cellular level. The dual-functionalized NPs voltammetric signals were also investigated. Finally the feasibility of platelets capture and actuation by magnetophoresis with micro-magnet array were demonstrated
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Lu, Qiang. „The Utility of X-Ray Dual-Energy Transmission and Scatter Technologies for Illicit Material Detection“. Diss., Virginia Tech, 1999. http://hdl.handle.net/10919/28565.
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X-ray devices have demonstrated the ability to characterize a material at the molecular and atomic levels. This ability is particularly important for detecting plastic explosives, where object shape information cannot be used. X-ray devices are relatively inexpensive compared to many other detection technologies. X-ray technology is considered as the technology for detecting illicit materials. Using x-ray technology, a material's density- and effective atomic number or Zeff-related information can be determined. In theory, an illicit material can be identified using those two pieces of information.
This dissertation discusses explosives detection in passenger luggage bags. The x-ray technology used is called R-L multi-sensing technology. The R-L technology was developed by researchers at Virginia Tech. It is the first true multisensing technology used for explosive detection. It uses dual-energy transmission and scatter technologies to obtain characteristic values of an object, i.e., R and L. The material type of this object can then be determined using R-L plane. The characteristic value R is computed using signals from dual-energy transmission modality. R is related to Zeff. The characteristic value L is computed using signals from low-energy transmission and scatter modalities. L is related to density. Compared to single-sensing technologies and pseudo multi-sensing technologies, the detection accuracy of R-L technology should be much higher.
The R and L values of an object can only be computed from an object's true gray levels. True gray level refers to the measured gray level of an object when it is not overlapped with any other objects. The problem is objects in a bag almost always overlap with other objects. Being able to identify the object of interest and remove the overlap effects becomes the key issue that needs to be solved.
The discussion in this dissertation focuses on the development of the image-processing system used on this multiple sensor system. This image-processing system is comprised of four steps. The first step is to spatially register images from all the sensing modalities. The second step is to remove noise using the edge-preserving smoothing algorithm. The third step is to segment image into regions with relatively uniform gray levels. The fourth step is to compute the true gray levels for objects of interest using the mathematical models for removing overlapping effects. Most of the research focuses on developing a robust segmentation algorithm for segmenting x-ray bag images and developing mathematical models for removing object overlapping effects. The unique contribution of this dissertation includes the development of those mathematical models used for removing object-overlapping effects, and the development of the algorithm for determining an object's true gray levels.
The experimental verification shows that the algorithms for registration, smoothing, and segmentation work well. The algorithm that computes the true gray levels of an object can perform the computation quite precisely in transmission modality. However, the methods that were developed for computing an object's true gray levels in scatter images are much less accurate.Ph. D.
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Ahmed, Atheeq. „Human Detection Using Ultra Wideband Radar and Continuous Wave Radar“. Thesis, Linköpings universitet, Kommunikationssystem, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-137996.
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A radar works by radiating electromagnetic energy and detecting the reflected signal returned from the target. The nature of the reflected signal provides information about the target’s distance or speed. In this thesis, we will be using a UWB radar and a CW radar to help detect the presence and rough location of trapped survivors by detecting their motions. Range is estimated in the UWB radar using clutter removal with SVD and for the dual frequency CW Radar using STFT and median filtering. The effect of the algorithm parameters on their performance was analyzed. The performance of the implemented algorithms with regards to small motion detection, distance estimation and penetration capability was analyzed. Both systems are certainly capable of human detection and tracking.
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Zhao, Bowen. „Molecularly imprinted polymers-based colorimetric-SERS dual biosensor for the detection of atrazine in apple juice“. Thesis, University of British Columbia, 2017. http://hdl.handle.net/2429/63441.
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Atrazine is a harmful herbicide that can disrupt the hormonal system in humans and animals. Contamination of atrazine in various agri-food products occurs due to illegal uses. Detection of atrazine in foods is time consuming and expensive when the official methods such as gas chromatography-mass spectrometry are applied. In this thesis project, we developed a dual biosensor integrating molecularly imprinted polymers (MIPs) with gold nanoparticles (AuNPs)-based colorimetric assay and surface enhanced Raman spectroscopy (SERS), which can be applied for rapid, high-throughput and sensitive determination of trace levels of atrazine in agri-food products (e.g., apple juice).
This biosensor includes three functions: separation, screening, and quantification. For separation, MIPs were synthesized using molecular imprinting technology by employing atrazine as the template molecule. MIPs-based solid phase extraction (MIPs-SPE) could selectively separate atrazine from apple juice with high recoveries (~93%). AuNPs-based colorimetric assays were able to rapidly detect atrazine due to ligands between atrazine molecules and the surface of AuNPs. High-throughput screening of a large number of samples could be achieved with simple color variation with the limit of detection (LOD) as low as 0.01 mg L-¹. For quantification, SERS tests were conducted using AuNPs for Raman spectral collection. Raman spectra of apple juice samples with different concentrations of atrazine were rapidly collected and analyzed by chemometrics. The calculated LOD equals to 0.0012 mg L-¹ and limit of quantification (LOQ) was 0.0040 mg L-¹, both of which meet the guidelines set up by Health Canada (i.e., 0.005 mg L-¹).
Three types of AuNPs with different diameters (i.e., 43 nm, 27 nm, 11 nm) were synthesized and compared for the use of this biosensor. The largest AuNPs worked best for colorimetric assays while the medium-size AuNPs were the most suitable candidate for SERS tests. The extremely low LOD and LOQ strongly validate the potential application of this innovative dual biosensor for accurate and high-throughput determination of atrazine in foods.Land and Food Systems, Faculty of
Graduate
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Frantz, Ulisses Giacomini. „ANÁLISE DE DESEMPENHO EM TRAÇÃO DE RODADO SIMPLES E DUPLO EM UM TRATOR AGRÍCOLA“. Universidade Federal de Santa Maria, 2011. http://repositorio.ufsm.br/handle/1/7539.
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Coordenação de Aperfeiçoamento de Pessoal de Nível SuperiorA major problem of agricultural tractor during several operations in which it is used is the difficulty of working in various moisture conditions and soil types affect your ability to traction force, slip and fuel consumption. What has been observed is that with increased contact surface between the tire of the tractor and the ground, there is the possibility of reductions in slippage, since it compensates with its increased weight on the wheels. Considering the importance of agricultural tractors and characteristics of pneumatic tires to develop traction force and the fluctuation in the soil, this study aimed at comparing the use of single and dual tires on the rear axle of a tractor equipped with front wheel assist (FWA ) with different tire inflation pressures internal to the tractor and shot at a fixed pressure of the external configuration of dual tires, to assess performance in traction, using as parameters to assess the strength available: the drawbar pull, fuel consumption, the slip. Were also assessed indirectly by the pressure applied by the treads to the ground, weight transfer, forward kinematics, drawbar power, traction efficiency, dynamic coefficient of traction. It was found that the use of dual tires increases the contact surface of the tire with the soil may reach 13% increase from the surface, there are increments of 4.35% in the traction force on the use of dual tires in relation to the single increases in 7.5% of the available power at the drawbar when used double wheels at a pressure of 138 kPa. There was no difference in the slip to both axles. It was also found that the use of dual tires led to the highest efficiency in the drawbar that for the single, with the highest efficiency of 72.8%. The treatment produced the best results in this analysis was to run the setup dual tires with the pressure of 138 kPa.
Um dos maiores problemas do trator agrícola durante as diversas operações em que ele é utilizado é a dificuldade de se trabalhar nas mais diversas condições de umidade e tipos de solo afetando a sua capacidade de força de tração, consumo de combustível e patinamento. O que se tem observado é que, com o aumento da superfície de contato entre o pneu do trator agrícola e o solo, há a possibilidade de reduções dos índices de patinamento, desde que se compense com o respectivo aumento de peso sobre os rodados. Considerando a importância dos tratores agrícolas e características dos seus rodados pneumáticos em desenvolver força de tração e flutuação no solo, o presente trabalho analisou comparativamente o uso de rodado simples e rodado duplo no eixo traseiro de um trator agrícola dotado de tração dianteira auxiliar (TDA), com diferentes pressões de insuflagem dos pneus internos do trator e a uma pressão fixa no rodado externo da configuração de rodado duplo, para avaliação de desempenho em tração, utilizando-se como parâmetros de avaliação: a força disponível na barra tração, o consumo de combustível e o patinamento. Também foram avaliados indiretamente a pressão aplicada ao solo pelos rodados, transferência de peso, avanço cinemático, potência disponível na barra de tração, eficiência em tração, coeficiente dinâmico de tração. Foi verificado que o uso de rodado duplo aumenta a superfície de contato do pneu com o solo podendo chegar a 13 % de aumento dessa superfície, há incrementos da ordem de 4,35 % na força de tração na utilização de rodado duplo em relação ao rodado simples, aumenta-se em 7,5 % a potência disponível na barra de tração quando utilizado rodado duplo na pressão de 138 kPa. Não houve diferença no patinamento para ambos os rodados. Verificou-se também que a utilização de rodado duplo proporcionou maiores valores de eficiência em tração que para o rodado simples, sendo a maior eficiência de 72,8%. O tratamento que apresentou os melhores resultados nesta análise foi para a configuração rodado duplo na pressão de 138 kPa.
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Bornefalk, Hans. „Computer-aided detection and novel mammography imaging techniques“. Doctoral thesis, Stockholm, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3861.
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Hytla, Patrick C. „Multi-Ratio Fusion Change Detection Framework with Adaptive Statistical Thresholding“. University of Dayton / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1461322397.
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Uhde, Kristin Broome. „Bioterrorism Syndromic Surveillance: A Dual-Use Approach with Direct Application to the Detection of Infectious Disease Outbreaks“. [Tampa, Fla.] : University of South Florida, 2003. http://purl.fcla.edu/fcla/etd/SFE0000623.
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Sung, Chih-Hsiang. „Dual-channel radially polarized surface plasmon microscopy for sensitive detection of fluorescent and non-fluorescent nano-objects“. Thesis, Cachan, Ecole normale supérieure, 2011. http://www.theses.fr/2011DENS0004.
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En raison de leur avantage en sensibilité de surface, un grand choix de biocapteurs SPR (résonance de plasmons desurface) est disponible sur le marché tant pour la recherche scientifique que pour le médical personnalisé. Lesapplications à l'imagerie SPR sont généralement basées sur la méthode du prisme de couplage et une miniaturisation enbiopuces avec parallélisme matriciel. Ces développements se heurtent à des inconvénients de par leurs limites enrésolution spatiale et le caractère non-uniforme des régions détectées. Si plusieurs microscopes à très haute résolutionsont en cours de développement, les systèmes restent généralement complexes et onéreux.Dans cette thèse, nous avons adopté la méthode SPR pour concevoir et construire un nouveau système d'imagerie.Outre le signal de fluorescence, les phénomènes d’absorption SPR peuvent être utilisés pour imager et mieuxcomprendre les propriétés de surfaces. Dans ce but, nous avons réalisé un microscope à plasmon de surface à deuxcanaux et à polarisation radiale pouvant détecter des nanoparticules isolées. Dans le cas de nanosphères avec moléculesfluorescentes, nous avons démontré la possibilité de collecter simultanément les images de fluorescence et de diffusionélastique. Ces deux signaux complémentaires conduisent à des images bien co-localisées. Une meilleure résolution etune amélioration de la sensibilité ont été rendues possibles en utilisant un polariseur radial et un objectif à ouverturenumérique élevée, qui permettent de polariser en configuration TM l'ensemble du faisceau incident, conduisant à laformation d'un anneau circulaire sombre dans l'image réfléchie. Le signal de fluorescence est clairement amplifié deplus de 50% sous polarisation radiale par rapport à un polarisation linéaire, la polarization azimuthale, à caractèrecomplètement TE ne permettant pas le couplage aux plasmons et servant de référence neutre.Nous avons tout d’abord appliqué cette technique à la détection de nanosphères fluorescentes isolées (de 20 nm dediamètre), ce qui est susceptible de révéler des informations inaccessibles aux mesures classiques sur film épais. Enoutre, cette technique se révèle être également un moyen de compenser les intermittences par clignotementcaractéristiques de la fluorescence, lesquelles n'affectent pas le canal de diffusion élastique. Nous avons enfin étenducette technique aux objets biologiques tels que des brins d'ADN et des membranes cellulaires en milieu liquide. Cettetechnique a également été étendue à l'étude de signaux de fluorescence à deux photons (TPF) émis par des nanosphèresà base d’organo-métalliques, ainsi qu’à celle de signaux de génération de seconde harmonique (SHG) en provenance denanocristaux non-centrosymétriques. Les effets de renforcement de la fluorescence par l’effet d’un ion métalliqueainsi que les phénomènes d'extinction par des boîtes quantiques sont des sujets d’investigation fondamentale associés àces axesDue to the advantage of surface sensitivity, various SPR biosensors for scientific research fields or personalmedicine markets have been reported. However, especially for SPR imaging applications, the designs are usually basedon prism-coupling method and ensuing chips with array patterns. In fact, these designs entail the disadvantages of alimited spatial resolution and non uniform detection regions. Although several super-resolution microscopes have beenproposed and developed, systems are usually complicated and high-costs. In our thesis, we adopt the surface plasmonresonance technique to build a brand new imaging system. Alongside fluorescence, SPR absorption can be also beexploited towards better imaging and understanding of the surface properties.Towards this aim, we demonstrate a dual-channel radially-polarized surface plasmon microscopy (SPM) systemwith capability down to single nanoparticle detection. For nanospheres stained with fluorescent molecules, we are ableto simultaneously collect the fluorescence and elastic scattering images, these two complementary emitted signalsleading to well co-localized images. The improved resolution and higher sensitivity of our system are enabled by use ofa radial polarizer and a high numerical aperture objective, which provide TM-polarization status to the entire incidentbeam, which results in the formation of a dark circular ring in the reflected image. The fluorescence intensity is thenclearly enhanced by more than 50% under radial polarization as compared to a linear one, while azimuthal polarizationbeing fully TE is ineffective and serves as a reference.We first applied this technique to detect a single fluorescent sphere of 20 nm in diameter, which potentiallyreveals unique information as compared to other measurements on bulk films. Moreover, it also provides a way tocompensate for the blinking characteristic of the fluorescence, which does not affect the elastic scattering channel. Weare currently extending this technique to stained biological objects such as DNA strands and cell membranes in liquidenvironments. This technique has been extended to study two photon fluorescence (TPF) signals from organometallic nanospheres, as well as second harmonic generation (SHG) signals from non-centrosymmetric nanocrystals via a multiphoton confocal microscope. In relation with this research, metallic ion enhanced fluorescence and quenching effects from quantum dots are fundamental topics currently under investigation
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Balci, Burak. „On The Detection Of Sinusoidal Signals Under Sinusoidal Interference“. Master's thesis, METU, 2010. http://etd.lib.metu.edu.tr/upload/12612785/index.pdf.
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A complex exponential waveform embedded in white noise can be optimally detected by matched filtering which is equivalent to Discrete Fourier Transform (DFT). However, if the input includes multiple complex exponentials, the DFT processing is not optimal. The frequency spectrum of the complex exponential signal with finite observation interval is not impulse. The spectrum includes side-lobes called spectral leakage.Because of the strong side-lobes, weak components can be masked, or side-lobes can be interpreted as independent complex exponentials causing false alarms. The conventional approach is to suppress side-lobes by using an amplitude weighting function, called a window function. However, windows reduce the signal to noise ratio at the output and also widens the main lobe in the spectrum resulting in a loss of frequency resolution. In this thesis, the problem of detection of a complex exponential signal under a secondary complex exponential interference is investigated. Alternative windowing techniques such as spatially variant apodization (SVA), dual apodization (DA) are studied in the context of detection of weak sinusoids under strong sinusoidal interference. The detection performance of SVA and DA is compared with the conventional methods and the optimal detector.
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Elmasri, Karima. „A robust technique for the detection and quantification of abdominal aortic calcification using dual energy X-ray absorptiometry“. Thesis, Cardiff University, 2018. http://orca.cf.ac.uk/115458/.
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Arterial calcification is a manifestation of atherosclerosis, which over the last two decades has become a recognised predictor of cardiovascular disease. Abdominal Aortic Calcification (AAC) and osteoporosis have been shown to coincide in older individuals. The accepted method of diagnosing osteoporosis is through the measurement of bone mineral density by dual energy x-ray absorptiometry (DXA). Vertebral fracture assessment (VFA) images obtained alongside BMD using DXA technology provide an inexpensive resource for AAC diagnosis. Although several simple methods have been proposed for manual semi-quantitative scoring of AAC in x-ray images in the past, these methods have limitations in terms of capturing small changes in atherosclerosis progression and are time-consuming. Several automatic approaches have been proposed to measure AAC on radiographs. However, these methods have not been related to any accepted medical AAC scoring systems and thus are not likely to be adopted easily by the medical community. In addition, there has been no attempt to apply the proposed methods to VFA images. The main focus of the research presented in this thesis is the automatic quantification of AAC in VFA images acquired in single energy mode. The thesis is divided into two main parts. In the first part, an automatic method for AAC detection and quantification in VFA images is proposed and evaluated on a large number of images. In the second part, the performance of both single and dual energy VFA imaging for the detection of uniformly distributed calcification is investigated. The automatic method for AAC detection consists of two stages. In the first stage an active appearance model was employed for the purpose of segmentaion. In the second stage, adaptive thresholding techniques were used to detect AAC, whilst automatic iii classification techniques were used to quantify the detected calcification. The performance of several classifiers were investigated, and the proposed method was evaluated against the manual AC-24 scoring method using several hundred images and two human readers. A thorough statistical analysis of the results showed that, overall, the SVM classifier gave the best results. Weighted accuracy, sensitivity, specificity assessed for 4 AAC categories were 89.2%, 78.5% and 92.3% respectively while the corresponding values for 3 AAC categories were 88.6%, 86%, 90.4%. In the second part, a study using a tissue-mimicking physical phantom is described. The phantom consists of an aluminium strip within Perspex to simulate calcification and abdominal soft tissue respectively. VFA images of different phantom configurations were acquired in single energy (SE) and dual energy (DE) modes. The minimum detectable aluminium thickness was assessed visually and related to contrast and contrast-to-noise ratio. Percentage coefficient of variation was used to quantify uniformity, repeatability and reproducibility with a Perspex width of 25 cm, the smallest thickness of aluminium that could be detected was 0.20- 0.25 mm. The initial results are promising, and the system proposed in this research can be used as an alternative method to the manual scoring system (AC-24) for a wide range of AAC. The principal conclusion from the phantom work is that under idealised imaging conditions, VFA images have the potential to be used for detecting small thicknesses of calcification with good linearity, repeatability and reproducibility in SE and DE modes for patients with a body width < 30 cm.
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Frey, Darren. „The identification of individual-specific conflict detection sensitivities“. Thesis, Sorbonne Paris Cité, 2017. http://www.theses.fr/2017USPCB238.
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Les développements récents de la recherche en sciences cognitives ont établi que les individus détectent fréquemment qu'ils sont en train de commettre certaines erreurs de raisonnement, alors même qu'ils n'identifient pas, et peut-être ne peuvent pas identifier, la source de ces erreurs. Jusqu'à maintenant, ce programme de recherche a principalement visé à démontrer que même les individus aux raisonnements les plus biaisés faisaient preuve de tendances à la détection de conflits. Le présent travail s'appuie sur ces résultats et analyse trois domaines d'enquête connexes et encore inexplorés : (1) les sous-types de détection de conflits ; (2) les différences individuelles quant à la détection ; (3) le caractère de généralité ou de spécificité au domaine des sensibilités pour la détection de conflits. En identifiant des sous-types de détection de conflits de plus en plus spécifiques, ce projet a pour objectif d'examiner les corrélations entre, d'une part, certaines sensibilités pour la détection de conflits, et des prédicteurs cognitifs, d'autre part. Il s'agit, fondamentalement, d'un travail préparatoire en vue d'une analyse différentielle complète des sensibilités particulières de détection de conflits parmi les individus en train de raisonnerRecent state of the art research into cognitive biases has revealed that individuals often detect that they are making certain reasoning errors even when they themselves do not, perhaps cannot, articulate the source of the error. Until now, this research has focused primarily on demonstrating the existence of conflict detection tendencies among even the most biased reasoners. This thesis builds on this research by analyzing three related and unexplored areas of inquiry: (1) subtypes of conflict detection; (2) individual-specific differences among detectors; and (3) the domain generality or specificity of conflict detection sensitivities. By identifying increasingly fine-tuned detection subtypes, the project aims to explore correlations between particular conflict detection sensitivities and other cognitive predictors. It is, essentially, preparatory work for a complete differential analysis of conflict detection sensitivities among reasoners
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Aslan, Bulent. „Physics And Technology Of The Infrared Detection Systems Based On Heterojunctions“. Phd thesis, METU, 2004. http://etd.lib.metu.edu.tr/upload/12604801/index.pdf.
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The physics and technology of the heterojunction infrared photodetectors having different material systems have been studied extensively. Devices used in this study have been characterized by using mainly optical methods, and electrical measurements have been used as an auxiliary method. The theory of internal photoemission in semiconductor heterojunctions has been investigated and the existing model has been extended by incorporating the effects of the difference in the effective masses in the active region and the substrate, nonspherical-nonparabolic bands, and the energy loss per collisions. The barrier heights (correspondingly the cut-off wavelengths) of SiGe/Si samples have been found from their internal photoemission spectrums by using the complete model which has the wavelength and doping concentration dependent free carrier absorption parameters. A qualitative model describing the mechanisms of photocurrent generation in SiGe/Si HIP devices has been presented. It has been shown that the performance of our devices depends significantly on the applied bias and the operating temperature. Properties of internal photoemission in a PtSi/Si Schottky type infrared detector have also been studied. InGaAs/InP quantum well photodetectors that covers both near and mid-infrared spectral regions by means of interband and intersubband transitions have been studied. To understand the high responsivity values observed at high biases, the gain and avalanche multiplication processes have been investigated. Finally, the results of a detailed characterization study on a systematic set of InAs/GaAs self-assembled quantum dot infrared photodetectors have been presented. A simple physical picture has also been discussed to account for the main observed features.
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Tsourkas, Andrew. „Development and optimization of dual FRET-molecular beacons for the detection and visualization of single-stranded nucleic acid targets“. Diss., Georgia Institute of Technology, 2002. http://hdl.handle.net/1853/19256.
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Marotta, Stefanie. „Polarimetric Exploratory Data Analysis (pEDA) using Dual Rotating Retarder Polarimetry for In Vitro Detection of Early Stage Lung Cancer“. University of Akron / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=akron1318383169.
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Desmond, Allan Peter. „An analytical signal transform derived from the Walsh Transform for efficient detection of dual tone multiple frequency (DTMF) signals“. Thesis, Bucks New University, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.401474.
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Zhou, Bo. „DETECTION AND QUANTIFICATION OF CORONARY CALCIUM FROMDUAL ENERGY CHEST X-RAYS: PHANTOM FEASIBILITY STUDY“. Case Western Reserve University School of Graduate Studies / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=case1481216785398625.
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Lu, Donghang [Verfasser], Rolf [Akademischer Betreuer] Jakoby und Mario [Akademischer Betreuer] Kupnik. „Dual-load Hybrid Detection of Water Content Using Electromagnetic and Surface Acoustic Wave Sensors / Donghang Lu ; Rolf Jakoby, Mario Kupnik“. Darmstadt : Universitäts- und Landesbibliothek Darmstadt, 2016. http://d-nb.info/1121206972/34.
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Reshef, Aymeric. „Dual-rotation C-arm cone-beam tomographic acquisition and reconstruction frameworks for low-contrast detection in brain soft-tissue imaging“. Electronic Thesis or Diss., Paris, ENST, 2018. http://www.theses.fr/2018ENST0044.
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L’arceau interventionnel est un système d’imagerie rayons X temps réel. Il dispose d’une option tomographique qui, grâce à une rotation de l’arceau autour du patient, permet d’acquérir des images en coupes dont la résolution en contraste est plus faible que celle des tomodensitomètres diagnostiques, rendant l’information clinique des tissus mous du cerveau inexploitable. Nous proposons un nouveau mode d’acquisition et de reconstruction tomographiques sur arceau interventionnel pour l’amélioration de la détection des faibles contrastes en imagerie interventionnelle des tissus mous de la tête. Afin d’émuler un filtre « bow-tie » (en nœud papillon), une double acquisition est envisagée. Les spécificités de la double acquisition imposent la conception d’un algorithme de reconstruction itérative dédié, incluant le filtre rampe dans l’énergie de minimisation. En bifurquant des approches par rétro-projection filtrée vers celles par filtration des rétro-projections, une méthode de reconstruction directe, alternative à la précédente, est proposée pour les acquisitions doubles. Pour une acquisition simple, la méthode est assurée de faire aussi bien que l’algorithme de rétro-projection filtrée quel que soit l’échantillonnage angulaire en géométrie planaire, et offre une approximation alternative à l’algorithme de Feldkamp-Davis-Kress en géométrie conique. Nous montrons qu’avec peu ou pas de modifications aux schémas précédents, les deux méthodes de reconstruction (itérative et directe) s’adaptent bien à la reconstruction de régions d’intérêt, à laquelle l’acquisition double reste étroitement liée à travers son acquisition tronquéeInterventional C-arm systems are real-time X-ray imaging systems, that can perform tomographic acquisitions by rotating the C-arm around the patient ; however, C-arm cone-beam computed tomography (CBCT) achieves a lower contrast resolution than diagnostic CT, which is necessary in order to benefit from the clinical information of soft tissues in the brain. We propose a new C-arm CBCT acquisition and reconstruction framework to increase low-contrast detection in brain soft-tissue imaging. In order to emulate a bow-tie filter, a dualrotation acquisition is proposed. To account for all the specificities of the dual-rotation acquisition, a dedicated iterative reconstruction algorithm is designed, that includes the ramp filter in the cost function. By switching from filtered backprojection (FBP) to backprojection-filtration (BPF) reconstruction methods, we propose an alternative, direct reconstruction method for dual-rotation acquisitions. For single-rotation acquisitions, the method ensures to perform as good as FBP with arbitrarily coarse angular sampling in planar geometries, and provides a different approximation from the Feldkamp-Davis-Kress (FDK) algorithm in the cone-beam geometry. Although we used it to emulate a virtual bow-tie, our dual-rotation acquisition framework is intrinsically related to region-of-interest (ROI) imaging through the truncated acquisition. With few or no modification of the proposed reconstruction methods, we successfully addressed the problem of ROI imaging in the context of dual-rotation acquisitions
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Smearcheck, Mark A. „Investigation of Dual Airborne Laser Scanners for Detection and State Estimation of Mobile Obstacles in an Aircraft External Hazard Monitor“. Ohio University / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1212687342.
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Yang, Chiang-Sam, und 楊景森. „The Study of Detection System for Tires Tread Depth by Mobile Devices“. Thesis, 2018. http://ndltd.ncl.edu.tw/handle/ngrf7n.
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碩士聖約翰科技大學
工業工程與管理系碩士班
106
Although the rapid advancement of the automotive industry technology can bring about the rapid evolution of human civilization and the convenience of mobile migration, it may also pose a threat to human life and property due to the use of carelessness. In particular, tires driven by automobiles are even more relevant to the safety of cars and the protection of passengers' lives. This paper supplies the full detection of automobile tire tread and tire groove. Providing a tread depth detection system which can be installed on the mobile device, rapidly detect. A user of the detection system only needs to download application programs (APPs) on various mobile devices. The security comparison is then performed via the provided comparison module and the result of the comparison is displayed on the screen. The module functions included in the detection device include a shooting module, a database module, a comparison module, a depth detection module, and the like. The tread/groove depth comparison of the tire is performed using a template approach technique. The driver can then detect whether the tread/groove depth meets safety requirements on his own to further ensure the driver’s own driving safety.
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Yang, Chien-Ting, und 楊建霆. „Dual-Mode Video Vehicle Detection System“. Thesis, 2010. http://ndltd.ncl.edu.tw/handle/48782244540020306531.
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博士國立交通大學
電控工程研究所
99
In this dissertation, a dual-mode video vehicle detection system and its applications for freeway and intersection are proposed. First, we presents a novel, real-time digital image stabilization (DIS) unit using a modified proportional integral (MPI) controller to remove stably unwanted shaking from an image sequence that is captured by a outdoors video camera. A compensating motion vector (CMV) estimation method with a modified PI control unit is proposed to remove the unwanted jitter. For freeway applications, we present a novel and complete structure in feature combination as well as analysis for orientating and labeling moving shadows so as to extract the defined objects in foregrounds more easily. Moreover, we make use of Gaussian Mixture Model (GMM) for background removal and detection of moving shadows in our tested images, and define two indices for characterizing non-shadowed regions where one indicates the characteristics of lines and the other index can be characterized by the information in gray scales of images which helps us to build a newly defined set of darkening ratios (modified darkening factors) based on Gaussian models. For intersection applications, to detect vehicles in a scene with heavy traffic is still a challenging problem. We present a novel automatic vehicle detection system. It first hypothesize potential locations of vehicles to reduce the computational costs by statistic of edge intensity and symmetry, then verify the correctness of the hypotheses using AdaBoost and Probabilistic Decision-Based Neural Network (PDBNN) classifiers, which exploits local and global features of vehicles respectively. Experimental results show that the proposed methods of this dissertation adapt to different conditions of image sequencing. The proposed methods also show effective improvements in different conditions of image sequence through in comparison with the background-based approaches.
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Tseng, Yu-Chen, und 曾郁蓁. „Dual process in recognition under change detection“. Thesis, 2010. http://ndltd.ncl.edu.tw/handle/00383232224275489473.
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碩士臺灣大學
心理學研究所
98
The objective of this study is to understand whether recollection and familiarity processes are both involved in recognizing a pre-change object under change blindness and change detected conditions, and whether they are affected by the completeness of representation. We manipulated viewing duration between two experiments (180 ms in Experiment 1 and 2 s in Experiment 2) to vary the completeness of representation. In both Experiments 1A and 2A, participants were required to detect a change between two arrays and then performed either an inclusion or exclusion recognition task. We used the modified dual-process signal detection model and a Bayesian method to estimate the proportion of recollection and familiarity under change detected and change blindness conditions. The results from both experiments supported the involvement of dual processes in recognizing a pre-change object. The proportion of recollection process was higher under correct detection than under change blindness and was higher when representations were more complete. To further verify the information recollected prior to performing change detection, we conducted Experiments 1B and 2B in which participants performed recognition prior to carrying out the detection task. Participants were also asked to report the contextual information upon which they performed the recognition task. When viewing duration was brief in Experiment 1B, temporal order and object category were the primary sources recollected under correct detection. When viewing duration was long in Experiment 2B, participants recollected temporal, object category, spatial location, and perceptual details under correct detection. These results suggested that successful comparison with a post-change object can be made when more sources of a pre-change object were recollected. Recollection failure is a reason for change blindness.
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Hsing-HaoLiu und 劉行皓. „Vehicle Detection and Collision Avoidance using Dual Vision System“. Thesis, 2014. http://ndltd.ncl.edu.tw/handle/23644508772530005515.
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碩士國立成功大學
航空太空工程學系
102
The vehicle is not only operated by driver but also assisted by electronic device to enhance drive awareness. Beginning with backward parking radar, the new technology is extended to safety assistance system. The collision avoidance system is important for driver to avoid the danger by keeping safety distance. The system inspects the situation on the road in any time to guarantee security of driving. The applied environment is set on the high way. It can be implemented by many sensors. Low cost vision device is worthy of applying on vehicle combining with driving recorder. This study uses dual vision acquisition to achieve the collision avoidance requirements. The proposed system contains image processing, vehicle searching, distance estimation and collision avoidance. The driver is just alerted on computer screen and still controlled the steering. It is safer than that the steering of vehicle is involved by the electronic device.
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Tsai, Jia-Chun, und 蔡佳君. „A Colorimetric and Fluorescence Dual-Function Probe for Detection“. Thesis, 2013. http://ndltd.ncl.edu.tw/handle/07726215548921109195.
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碩士國立交通大學
分子醫學與生物工程研究所
101
We designed and synthesized a hydrophilic probe, 7-nitro-2,1,3-benzoxadiazol-4-yl thiocyanate (NBD-SCN), that can detect four specific biothiols [hydrogen sulfide (H2S), cysteine (Cys), homocysteine (Hcy) and glutathione (GSH)] on the basis of colorimetric and fluorescent methods. Especially, the probe can distinguish three biothiols by observing the remarkable change of the visible color via naked eyes and quantitative analysis utilizing UV-Visible spectrophotometer. H2S induce a distinct color change from colorless to violet and absorption bands shift to 530 nm. The relationship between absorbance and concentration of H2S presents an excellent linear correlation and shows a detection limit of 0.28 µM. Cys and Hcy induce a distinct color change from colorless to orange and absorption bands shift to 480 nm. GSH induce a distinct color change from colorless to yellow and absorption bands shift to 420 nm. In addition, NBD-SCN displays a high selectivity for Cys and Hcy in fluorescent enhancement. NBD-SCN exhibited 650-fold and 798-fold enhancement in fluorescence intensity by presence of 10 equiv. Cys and Hcy. The relationship between fluorescence intensity and concentration of Cys and Hcy presents an excellent linear correlation and shows a detection limit of 14.4 nM and 10.8 nM. The fluorescent images of biothiols in living cells have also been demonstrated.
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Lyu, Jia-Siang, und 呂嘉翔. „Motion Control System and Collision Detection for Dual-Arm Robot“. Thesis, 2018. http://ndltd.ncl.edu.tw/handle/37388w.
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碩士淡江大學
電機工程學系機器人工程碩士班
106
In this thesis, a dual-arm robot based on two 7-DOF redundant robot manipulators motion control system is implemented, and a dual-arm robot collision detection method is proposed to enhance the security of motion control. It contains three main parts: (1) kinematics of dual-arm robot, (2) motion control of dual-arm robot, and (3) collision detection. In kinematics of dual-arm robot, redundancy of 7-DOF robot manipulator is defined to solve the problem of infinite solution in the inverse kinematics solution process in this thesis. Then, with a coordinate space transformation method proposed in this thesis, the command of left and right arms of dual-arm robot can solve by kinematics of 7-DOF robot manipulator. In motion control of dual-arm robot, this thesis proposed a method to synchronize joints of robot manipulator, so that trajectory of the end of robot manipulator can be more stable when the dual-arm robot is operated. In collision detection, this thesis first defined the links of robot manipulator as lines segment, so that collision detection of the links is regarded as distance detection of each line segment. After that, line segment equation of each link is obtained by calculating the position of each joint with forward kinematics, combined the information of velocity and displacement, and it would obtain links movement situation, then the relationship between links in the space can be analyzed to detect the robot manipulators whether collide with each other or not. In the experiment results, this thesis uses simulation to verify the proposed kinematics and motion control method can make the dual-arm robot have a good control effect, and the proposed collision detection algorithm can indeed make the dual-arm robot achieve collision-free.
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Chien, Chun-An, und 錢俊安. „Dual detection platform of MEF and SERSbased on silver nanostructure“. Thesis, 2019. http://ndltd.ncl.edu.tw/cgi-bin/gs32/gsweb.cgi/login?o=dnclcdr&s=id=%22107NCHU5810005%22.&searchmode=basic.
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碩士國立中興大學
生醫工程研究所
107
Basically, biosensing application of the surface plasmon resonance, there are two spectra results are achieved. For example, attaching a dye molecule directly to a metal nanoparticle surface typically results in fluorescence quenching due to energy transfer between the fluorophore and the metal. Thus the Raman spectrum of the molecule can be strongly enhanced due to the high electromagnetic field at the surface of the particle, namely surface enhance Raman Scattering (SERS). Alternatively, spacing the fluorophore slightly away from the particle surface prevents fluorescence quenching but can lead to a significant increase in the emission from the molecule, namely metal enhance fluorescence (MEF). That is, fluorescence emission for MEF and Raman scattering for LSPR are competing phenomena. In this thesis, I try to build up a platform, 3D nanostructure constructing from silver nanowire, for MEF and SERS detecting use. Depending on the arrangement between the nanostructures and the molecules, either the fluorescence or the Raman signal may be enhanced. First of all, I synthesis the nanowire and construct a campfire-bone liked 3D nanostructure, which allowed the analyst to be dropped or smeared on, and then the optimizes MEF or SERS effect was explored basing on the ratio between nanowire and analyst to find the detection limit, respectively. And then, I discuss and evaluate the MEF or SERS effect through molecules with variable positive-charge number and length of spacers base on the optimizes MEF or SERS platform. DNA binding molecules BMVC derivatives, pH biosensor BAP and standard lasing dye R6G were used as probes to develop the mechanism above. Meanwhile, both of the lasing wavelength of system and illumination degree of analyst (especial fluorescent organic nanoparticles, FONs) are also impact factors to collect appropriate data, which is analyst dependent. Eventually, the 3D nano-platform was successfully applied to detect the pesticides and bacteria, it is worth looking forward to evaluate the future application and development of this platform.
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Dube, Chad M. „Dual-Process Theory and Syllogistic Reasoning: A Signal Detection Analysis“. 2009. https://scholarworks.umass.edu/theses/242.
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47
Chiou, Jian-Hau, und 邱健豪. „Dual-channel Non-invasive Brain Signal Detection NIRS System implementation“. Thesis, 2013. http://ndltd.ncl.edu.tw/handle/87850849226317068954.
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碩士國立交通大學
電控工程研究所
102
This study aims a simpler near-infaraed spectroscopy (NIRS) system with smaller and lower cost than commercial instrument. To detect the hemodynamic response of oxyhemoglobin (HbO2) and deoxyhemoglobin (Hb) in human tissue based on the different absorption of near-infrared light wavelengths, this system used cheap light emitted diodes (LEDs) photodiodes (PDs) as the light source and detector, respectively. For peripheral Interface control, FPGA was utilized to control the pulse width modulation (PWM) for LEDs to generate various density of light source. The light distributor for red and infrared light and the automatic power calibration in this system were implemented by analog signal processing circuits and controlled by the FPGA. This study designed an interactive brain computer interface (BCI) with the arterial occlusion experiments to test the feasibility, and then verified the system and its algorithm with breath-hold experiments. In the experiment results, the proposed system has better hemodynamic response then ETG-4000, an extremely expensive NIRS system designed by Hitachi Medical Corporation. Finally, compared with other related NIRS systems, the light source and light distributor architecture of the proposed system is more easily and simply to implement, and this study has proved the feasibility of series of experiments.
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Tse-AnChen und 陳則安. „A Dual-Mode AC Signal Processing IC for Bio-Sample Detection“. Thesis, 2010. http://ndltd.ncl.edu.tw/handle/40611188309951510635.
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碩士國立成功大學
電機工程學系碩博士班
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With the improvement of sanitation, the invention of vaccines, the innovation of medical technology, and the progress in health care systems, the incidence of disease is significantly decreased, the cure rate is also increased and the average life of human being has been prolonged significantly. Therefore, the biomedical detection can early detect the disease and even prevent disease gets more and more attention. In recent years, integrating biomedical detection technology into chips is one of the main trends in IC design field. By integrating the circuits, people can perform their basic bio-detections at home, with no need to go to hospital. The presented chip uses the electrochemical impedance spectroscopy (EIS) method. Compared with other bio-sample detection methods, this detection method is much faster, and both the input signals and measured signals are all electro signals, so it can be directly and effectively integrated the circuit into the system chip. This chip contains the entire front-end input signal processing circuit and sensing circuits of the bio-sample detection system. The input signal processing circuits can provide two sets of identical constant voltage or constant current AC signals. Its frequency range is from 10 Hz to 10 kHz, its output voltage range is 1.5V~3.5V, and the maximum magnitude of its output current is 1mA. Besides, the sensing circuits detect the magnitude and phase of the measured signals, and convert them into DC outputs. The die area of this chip is 1.7x2.0mm^2 , and the package is 40 S/B. The chip was implemented by Taiwan Semiconductor Manufacturing Company (TSMC) 0.35μm 2P4M 5V mixed-signal polycide process, patronized by National Chip Implementation Center (CIC).
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Ezziddine, Maha. „Dual-aptasensor array for osteopontin detection: optimization of aptamers immobilization conditions“. Master's thesis, 2017. http://hdl.handle.net/10198/14426.
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Mestrado com dupla diplomação com o High Institute of Biotechnology of Monastir (ISBM), TunisiaCancer diseases are associated with the presence of several protein biomarkers. Aptasensor arrays may allow early multiple-detection of these biomarkers which can make significant improvements in the lives of cancer patients. Clinical studies suggest that osteopontin, an overexpressed protein by tumor cells, may be used as a diagnostic biomarker for various cancers. The aim of the present work was to establish the optimal experimental conditions that allow enhancing the performance of an electrochemical dual-aptasensor array for the detection of osteopontin. The aptamer concentration, time and temperature of immobilization into the dual-screen printed gold electrodes (Dual-SPGE) as well as the aptamer-protein interaction time were evaluated using a 2k factorial experimental design. DNA and/or RNA aptamers were immobilized on the Dual-SPGE via streptavidin-biotin interaction and the evaluation of the best experimental conditions was carried out by cyclic and square wave voltammetry using a ferro/ferricyanide solution ([Fe(CN)6]3−/4−) as a redox probe. Statistical significant models for both DNA and RNA aptamers were established. Temperature and aptamer concentration were found to be the most significant parameters. Also, the results pointed out that interaction effects between the four parameters were usually statistically significant, showing that there was a dependency between aptamer concentration-aptamer immobilization time and between temperature-aptamer immobilization time. The optimum experimental conditions found for enhancing the performance of the dual-aptasensor array were 4°C, 0.5 μM of aptamer concentration, 20 min of aptamer incubation and 30 min of aptamer-osteopontin interaction.
O cancro é uma doença à qual pode ser associada a presença de diversas proteínas nos fluidos biológicos de pacientes com essa patologia, as quais podem ser usadas como biomarcadores. Os biossensores à base de vários aptâmeros (aptasensors arrays) podem permitir a deteção múltipla desses biomarcadores num estágio precoce da doença, podendo proporcionar melhorias significativas na vida dos pacientes com cancro. Estudos clínicos sugerem que a osteopontina, é uma proteína sobre-expressa por células tumorais, podendo ser utilizada como biomarcador no diagnóstico de vários tipos de cancro. O objetivo do presente trabalho foi estabelecer as condições experimentais que maximizassem o desempenho de um duplo biossensor eletroquímico contendo dois aptâmeros (duplo-aptasensor array) para a deteção de osteopontina. O desenho experimental 2k fatorial foi utilizado com o intuito de estudar o efeito da concentração dos aptâmeros, tempo e a temperatura de imobilização no elétrodo de trabalho de ouro duplo (duplo-SPGE), bem como o tempo de interação aptâmero-proteína. Os aptâmeros de ADN e/ou ARN foram imobilizados no duplo-SPGE através da interação biotina-estreptavidina e a avaliação das melhores condições experimentais foi realizada por voltametria cíclica e voltametria de onda quadrada usando uma solução de ferro/ferricianeto ([Fe (CN)6]3-/4-) como solução redox. Para os aptâmeros de ADN e ARN foram estabelecidos modelos significativos, sendo a temperatura e a concentração dos aptâmeros os parâmetros mais significativos. Além disso, os resultados mostraram que o efeito da interação dos 4 parâmetros foi em geral estatisticamente não significativo, verificando-se uma dependência do tempo de imobilização dos aptâmeros com a concentração dos aptâmeros e com a temperatura aplicada, respetivamente. As condições experimentais ótimas estabelecidas de forma a melhorar o desempenho do duplo-aptasensor array foram uma temperatura de 4ºC, com uma concentração de 0.5 μM para dois aptâmeros, após 20 min e 30 min de incubação no duplo-SPGE e de interação aptâmeros-osteopontina, respetivamente.
Les maladies cancéreuses sont liées à plusieurs biomarqueurs protéiques qui peuvent être précocement détectés par des biocapteurs à aptamères et par conséquent des améliorations notables peuvent être apportées à la vie des patients. Des études cliniques suggèrent que l'ostéopontine, une protéine surexprimée par les cellules tumorales, peut être utilisée comme un biomarqueur pour le diagnostic du cancer. Le but du présent travail est d'établir les conditions expérimentales optimales permettant d'améliorer la performance d’un biocapteur éléctrochimique à deux aptamères pour la détection de la protéine ostéopontine. La concentration de l'aptamère, la température et le temps d’immobilization de l’aptamère sur une électrode en or imprimée par sérigraphie ainsi que le temps d'interaction aptamère-protéine ont été évalués en suivant un plan factoriel à deux niveaux. Les aptamères ont été immobilisés sur l’électrode via une interaction streptavidine-biotine et l'évaluation des meilleures conditions expérimentales a été effectuée par voltammetrie cyclique et par voltampérométrie à impulsion rectangulaire en utilisant une solution de ferro/ferricyanure ([Fe(CN)6]3-/4-) comme sonde redox. Des modèles statistiquement significatifs relatifs aux aptamères d'ADN et d'ARN ont été établis. La température et la concentration de l'aptamère ont été les paramètres les plus significatifs. L'effet des interactions entre les quatre paramètres a montré qu'il existe une dépendance entre la concentration de l'aptamère et le temps d'immobilisation de l'aptamère et entre la température et le temps d'immobilisation de l'aptamère. Les conditions expérimentales optimales pour améliorer la performance du biocapteur étaient 20 minutes d'incubation d'aptamère, 30 minutes d'interaction aptamère-ostéopontin, une température d’incubation de 4°C et une concentration d'aptamère de l’ordre de 0,5 μM.
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Brenlla, Elisa Adriana Ferrante. „Characterization of dual targeted contrast agents for the detection of atherosclerotic plaques /“. 2008. http://wwwlib.umi.com/dissertations/fullcit/3312139.
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