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Artykuły w czasopismach na temat "LCPMOS TECHNIQUE"
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Gaurkhede, S. G., M. M. Khandpekar, S. P. Pati i A. T. Singh. "Blue Fluorescence in Doped LaF3 Nanocrystals Synthesized by Microwave Technique". Advanced Materials Research 584 (październik 2012): 219–23. http://dx.doi.org/10.4028/www.scientific.net/amr.584.219.
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Hexagonal-phase LaF3: Ce3+, Pr3+, and Sm3+ doped (LCPS) nano-crystals have been synthesized by keeping same molarities of rare earth elements using aqueous route. The samples have been synthesized in conventional microwave on low power range in about an hour’s time. The phase formation has been verified by powder X-ray diffraction (XRD).Hexagonal geometry of the LCPS nano-crystals has been observed with an average particle size of 20 nm by TEM analysis. The JCPDS Card No. (32-0483) and selected area electron diffraction (SAED) pattern has been used for identification of crystal structure. The UV- VIS spectra indicated band gap of 5.00eV. The FTIR spectrums have been used for assignment of fundamental vibrations. Blue fluorescence observed with exciting wavelengths of 254 nm respectively. The presence of rare-earth elements in LCPS nano-crystals have been verified by the EDAX spectra.
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Liu, Lei, Yongji Wang, Fuqiang Xie i Jiashi Gao. "Legendre Cooperative PSO Strategies for Trajectory Optimization". Complexity 2018 (2018): 1–13. http://dx.doi.org/10.1155/2018/5036791.
Pełny tekst źródłaStreszczenie:
Particle swarm optimization (PSO) is a population-based stochastic optimization technique in a smooth search space. However, in a category of trajectory optimization problem with arbitrary final time and multiple control variables, the smoothness of variables cannot be satisfied since the linear interpolation is widely used. In the paper, a novel Legendre cooperative PSO (LCPSO) is proposed by introducing Legendre orthogonal polynomials instead of the linear interpolation. An additional control variable is introduced to transcribe the original optimal problem with arbitrary final time to the fixed one. Then, a practical fast one-dimensional interval search algorithm is designed to optimize the additional control variable. Furthermore, to improve the convergence and prevent explosion of the LCPSO, a theorem on how to determine the boundaries of the coefficient of polynomials is given and proven. Finally, in the numeral simulations, compared with the ordinary PSO and other typical intelligent optimization algorithms GA and DE, the proposed LCPSO has traits of lower dimension, faster speed of convergence, and higher accuracy, while providing smoother control variables.
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Cheng, Guanghao, Xiaochun Shu, Zhong Wang, Ning Wang i Fengjiao Zhang. "Establishing a Virus-Induced Gene Silencing System in Lycoris chinensis". Plants 12, nr 13 (27.06.2023): 2458. http://dx.doi.org/10.3390/plants12132458.
Pełny tekst źródłaStreszczenie:
Lycoris is an important plant with both medicinal and ornamental values. However, it does not have an efficient genetic transformation system, which makes it difficult to study gene function of the genus. Virus-induced gene silencing (VIGS) is an effective technique for studying gene functions in plants. In this study, we develop an efficient virus-induced gene-silencing (VIGS) system using the leaf tip needle injection method. The widely used TRV vector is constructed, and the Cloroplastos Alterados 1 (CLA1) and Phytoene Desaturase (PDS) genes are selected as visual indicators in the VIGS system. As a result, it is observed that leaves infected with TRV-LcCLA1 and TRV-LcPDS both show a yellowing phenotype (loss of green), and the chlorosis range of TRV-LcCLA1 was larger and deeper than that of TRV-LcPDS. qRT-PCR results show that the expression levels of LcCLA1 and LcPDS are significantly reduced, and the silencing efficiency of LcCLA1 is higher than that of LcPDS. These results indicate that the VIGS system of L. chinensis was preliminarily established, and LcCLA1 is more suitable as a gene-silencing indicator. For the monocotyledonous plant leaves with a waxy surface, the leaf tip injection method greatly improves the infiltration efficiency. The newly established VIGS system will contribute to gene functional research in Lycoris species.
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Apostolov, A. T., I. N. Apostolova i J. M. Wesselinowa. "Magnetic and electric properties of multiferroic LiFeP2O7. Comparison with LiCrP2O7". Modern Physics Letters B 35, nr 09 (2.02.2021): 2150158. http://dx.doi.org/10.1142/s021798492150158x.
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The temperature and magnetic field dependence of the magnetic and electric properties of LiFeP2O7 (LFPO) and LiCrP2O7 (LCPO) are studied using a microscopic model and the Green’s function technique. We have shown that LFPO is antiferromagnetic, but shows a weak ferromagnetism along the [Formula: see text] axis which originates from the canted antiferromagnetic order. For LCPO, such a ferromagnetic order along the [Formula: see text] axis is not observed. In the temperature dependence of the electrical polarization [Formula: see text] along the [Formula: see text] axis there is a kink at [Formula: see text] K which is an indirect evidence for the intrinsic magnetoelectric effect in LFPO. Applying an external magnetic field [Formula: see text], the polarization [Formula: see text] increases, stronger for small temperatures and the kink at [Formula: see text] disappears. For LCPO, we do not obtain a kink at [Formula: see text] K. LCPO is polar, but not ferroelectric. We can conclude that the missing magnetoelectric properties in LCPO could be due to the differences in the magnetic orders between LFPO and LCPO.
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Castagnini, Francesco, Giuseppe Tella, Maurizio Montalti, Federico Biondi, Barbara Bordini, Luca Busanelli i Aldo Toni. "Mid-term outcomes of a partial 2-stage approach in late chronic periprosthetic hip infections". HIP International 30, nr 3 (2.01.2020): 327–32. http://dx.doi.org/10.1177/1120700019855627.
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Introduction: Late chronic periprosthetic infections (LCPIs) are worrisome complications of primary hip arthroplasties. The gold standard procedure is the 2-stage revision. 1-stage exchange is gaining popularity in order to reduce the invasivity of the former technique. A partial 2-stage exchange technique, retaining fixed components, may overcome some of the drawbacks of the previous techniques, allowing a much easier reconstruction step. Methods: 28 patients with a LCPI after a primary total hip arthroplasty underwent a first removal stage: the loosened component was removed (23 cups and 5 stems) and the fixed component, with no local signs of infection, was retained. An antibiotic hand molded spacer was positioned in 16 cases. After a mean time of 8 months and a tailored antimicrobial therapy, the spacer was removed and the implant was revised. Results: The mean follow-up was 5 years. The HHS score was 82.7. 4 cases failed (2 patients presenting a septic relapse after revision and 2 patients undergoing Girdlestone arthroplasty), achieving a survival rate of 83.4% at 5 years. 2 patients were unwilling to perform a further procedure and did not proceed to the second stage. All the other patients had no clinical, radiological, laboratory signs of septic relapse. Conclusions: The partial 2-stage approach seems a promising technique for LCPI in selected cases, with good infection control. It allows an easier revision by sparing the fixed components. Larger case series and longer follow-ups are needed to confirm the results and identify the limits of this approach.
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Shen, Jiang, Jiachao Wu, Man Xu, Dan Gan, Bang An i Fusheng Liu. "A Hybrid Method to Predict Postoperative Survival of Lung Cancer Using Improved SMOTE and Adaptive SVM". Computational and Mathematical Methods in Medicine 2021 (10.09.2021): 1–15. http://dx.doi.org/10.1155/2021/2213194.
Pełny tekst źródłaStreszczenie:
Predicting postoperative survival of lung cancer patients (LCPs) is an important problem of medical decision-making. However, the imbalanced distribution of patient survival in the dataset increases the difficulty of prediction. Although the synthetic minority oversampling technique (SMOTE) can be used to deal with imbalanced data, it cannot identify data noise. On the other hand, many studies use a support vector machine (SVM) combined with resampling technology to deal with imbalanced data. However, most studies require manual setting of SVM parameters, which makes it difficult to obtain the best performance. In this paper, a hybrid improved SMOTE and adaptive SVM method is proposed for imbalance data to predict the postoperative survival of LCPs. The proposed method is divided into two stages: in the first stage, the cross-validated committees filter (CVCF) is used to remove noise samples to improve the performance of SMOTE. In the second stage, we propose an adaptive SVM, which uses fuzzy self-tuning particle swarm optimization (FPSO) to optimize the parameters of SVM. Compared with other advanced algorithms, our proposed method obtains the best performance with 95.11% accuracy, 95.10% G -mean, 95.02% F1, and 95.10% area under the curve (AUC) for predicting postoperative survival of LCPs.
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Sawyer, Linda C. "Structure-property relations of liquid crystalline polymers". Proceedings, annual meeting, Electron Microscopy Society of America 45 (sierpień 1987): 460–63. http://dx.doi.org/10.1017/s0424820100127013.
Pełny tekst źródłaStreszczenie:
Recent liquid crystalline polymer (LCP) research has sought to define structure-property relationships of these complex new materials. The two major types of LCPs, thermotropic and lyotropic LCPs, both exhibit effects of process history on the microstructure frozen into the solid state. The high mechanical anisotropy of the molecules favors formation of complex structures. Microscopy has been used to develop an understanding of these microstructures and to describe them in a fundamental structural model. Preparation methods used include microtomy, etching, fracture and sonication for study by optical and electron microscopy techniques, which have been described for polymers. The model accounts for the macrostructures and microstructures observed in highly oriented fibers and films.Rod-like liquid crystalline polymers produce oriented materials because they have extended chain structures in the solid state. These polymers have found application as high modulus fibers and films with unique properties due to the formation of ordered solutions (lyotropic) or melts (thermotropic) which transform easily into highly oriented, extended chain structures in the solid state.
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Winnicki, Marcin. "Advanced Functional Metal-Ceramic and Ceramic Coatings Deposited by Low-Pressure Cold Spraying: A Review". Coatings 11, nr 9 (30.08.2021): 1044. http://dx.doi.org/10.3390/coatings11091044.
Pełny tekst źródłaStreszczenie:
Based on the recent analysis of various databases, cold spray (CS), the newest method among thermal spraying technologies, has received the unabated attention of hundreds of researchers continuously since its invention in the 1980s. The significance of CS lies in the low process temperature, which usually ensures compressive residual stresses and allows for the formation of coatings on a thermally sensitive substrate. This paper concerns the low-pressure cold spray (LPCS) variant employed for forming metal matrix composites (MMCs) with high ceramic contents and all-ceramic coatings. At the very beginning, the influence of LPCS process parameters on deposition efficiency (DE) is analysed. In the next part, the most useful feedstock powder preparation techniques for LCPS are presented. Due to the combination of bottom-up powder production methods (e.g., sol-gel (SG)) with LCPS, the metal matrix that works as a binder for ceramic particles in MMC coatings can be removed, resulting in all-ceramic coatings. Furthermore, with optimization of spraying parameters, it is possible to predict and control phase transformation in the feedstock material. Further in the paper, differences in the bonding mechanism of metal–ceramic mixtures and ceramic particles are presented. The properties and applications of various MMC and ceramic coatings are also discussed. Finally, the exemplary direction of CS development is suggested.
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Abacilar, Maryna, Fabian Daus i Armin Geyer. "Chemoselective silicification of synthetic peptides and polyamines". Beilstein Journal of Nanotechnology 6 (8.01.2015): 103–10. http://dx.doi.org/10.3762/bjnano.6.10.
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Biosilicification sets the standard for the localized in vitro precipitation of silica at low orthosilicate concentrations in aqueous environment under ambient conditions. Numerous parameters must be controlled for the development of new technologies in designing inventive nanosilica structures, which are able to challenge the biological templates. A long neglected requirement that came into focus in the recent years are the cellular techniques of preventing unintentional lithification of cellular structures since numerous cellular components such as membranes, DNA, and proteins are known to precipitate nanosilica. The diatom metabolism makes use of techniques that restrict silicification to an armor of silica around the cell wall while avoiding the petrifying gaze of Medusa, which turns the whole cell into stone. Step by step, biochemistry unveils the hierarchical interplay of an arsenal of low-molecular weight molecules, proteins, and the cytoskeletal architecture and it becomes clearer why the organisms invest much metabolic effort for an obviously simple chemical reaction like the precipitation of amorphous silica. The discrimination between different soluble components in the silicification process (chemoselective silicification) is not only vitally important for the diatom but poses an interesting challenge for in vitro experiments. Until now, silica precipitation studies were mainly focused on the amount, the morphology, and composition of the precipitate while disregarding a quantitative analysis of the remaining soluble components. Here, we turn the tables and quantify the soluble components by 1H NMR in the progress of precipitation and present experiments which quantify the additivity, and potential cooperativity of long chain polyamines (LCPAs) and cationic peptides in the silicification process.
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Nowakowski, Waldemar, Piotr Bojarczyk i Zbigniew Łukasik. "Functional analysis of railway traffic control system using an expert system". AUTOBUSY – Technika, Eksploatacja, Systemy Transportowe 19, nr 6 (30.06.2018): 627–31. http://dx.doi.org/10.24136/atest.2018.145.
Pełny tekst źródłaStreszczenie:
The major functionality of railway traffic control system is to ensure efficient and safe railway traffic. Contemporary technique, electronics and informatics in particular, allows for automation of more and more tasks in transportation processes. Irrespective of the manufacturing technology, railway traffic control systems have to meet specific safety requirements. Because of this, these systems belong to group of safety-critical systems, also called safety-related systems. Due to these requirements, development, building and verification processes of railway traffic control systems always end with the assessment of correctness of each process. It should be pointed out that these processes are compound and require high skills level for persons involved in it. Because of this, an environment for an expert system (ExSys Corvid) can be used to automation of these processes. Authors used ExSys Corvid environment to build the expert system for verification and validation of Level Crossing Protection System (LCPS). Research conducted by authors confirmed high usefulness of this technology and showed the need for the usage of it in other railway traffic control systems.
Rozprawy doktorskie na temat "LCPMOS TECHNIQUE"
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JHA, RAVI RATAN. "STUDY OF LEAKAGE POWER REDUCTION TECHNIQUES IN CMOS CIRCUITS". Thesis, 2023. http://dspace.dtu.ac.in:8080/jspui/handle/repository/19897.
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Now a days power dissipation has become major issues in CMOS VLSI circuits due to
limited life span of the battery. The leakage power dissipation is one of the prime concern
at lower technology nodes. It is a difficult and challenging task to design a CMOS circuit
without any leakage issue. Also at lower technology nodes, the leakage current increases.
So, there is a need to study techniques which reduces leakage current.
In this study, the leakage power reduction techniques in CMOS circuits namely ONOFIC,
stack ONOFIC, LECTOR and LCPMOS have been investigated. Here the basic logic
gates namely NAND, NOR and sequential circuits like D flip flop and Up counters also
have been examined. It is found that these techniques offer higher resistance to the path
when in OFF state due to which it reduce the leakage current when compare to
conventional circuits.
In this work for simulation LT Spice tool has been used and all the circuits are examined
using 32nm technology node. Using ONOFIC technique on an average 79.57% leakage
power have been reduced in static circuits and 95.69% leakage power have been reduced
in sequential circuits. Using stack ONOFIC technique on an average 34.02% leakage
power have been reduced in static circuits and 94.51% leakage power have been reduced
in sequential circuits. Using LECTOR technique on an average 98.47% leakage power
have been reduced in static circuits and 98.34% leakage power have been reduced in
sequentialcircuits. Using LCPMOS technique on an average 85.364% leakage power have
been reduced in static circuits.