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Journal articles on the topic 'Improved Accumulation Area Ratio method'

Author: Grafiati

Published: 6 September 2023

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1

Yang, Shengying, Huibin Qin, Xiaolin Liang, and Thomas Gulliver. "An Improved Unauthorized Unmanned Aerial Vehicle Detection Algorithm Using Radiofrequency-Based Statistical Fingerprint Analysis." Sensors 19, no. 2 (2019): 274. http://dx.doi.org/10.3390/s19020274.

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Unmanned aerial vehicles (UAVs) are now readily available worldwide and users can easily fly them remotely using smart controllers. This has created the problem of keeping unauthorized UAVs away from private or sensitive areas where they can be a personal or public threat. This paper proposes an improved radio frequency (RF)-based method to detect UAVs. The clutter (interference) is eliminated using a background filtering method. Then singular value decomposition (SVD) and average filtering are used to reduce the noise and improve the signal to noise ratio (SNR). Spectrum accumulation (SA) and

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Ma, Qinghua, Lin Chen, Manyi Du, Yongan Zhang, and Yaoxiang Zhang. "Localized and Moderate Phosphorus Application Improves Plant Growth and Phosphorus Accumulation in Rosa multiflora Thunb. ex Murr. via Efficient Root System Development." Forests 11, no. 5 (2020): 570. http://dx.doi.org/10.3390/f11050570.

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Roots have high plasticity with the ability to adapt to heterogeneous nutrient distribution, but little is known about the effects of phosphorus (P) supply methods and levels on Rosa multiflora Thunb. ex Murr. root growth and nutrient accumulation. A pot study was conducted with two P supply methods (mixed and localized application) and three levels (P-deficient, P-moderate and P-adequate). The results showed that with localized application, P-deficient and P-moderate treatments significantly improved total root length, total surface area, total length of fine roots, shoot DW and total P accum

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Chatterjee, Kaushik, C. S. Singh, A. K. Singh, Ashok Kr Singh, and S. K. Singh. "Performance of wheat cultivars at varying fertility levels under system of wheat intensification and conventional method of wheat production system." Journal of Applied and Natural Science 8, no. 3 (2016): 1427–33. http://dx.doi.org/10.31018/jans.v8i3.977.

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A field experiment was conducted during rabi season of 2009-10 at Ranchi, Jharkhand to evaluate the performance of wheat cultivars at varying fertility levels under system of wheat intensification and conventional method of cultivation. The morpho-physiological analysis of growth and yield in wheat revealed that system of wheatintensification manifested higher total tillers m-2, leaf area index, dry matter accumulation, crop growth rate, number of spikes m-2, grains per spike and 1000-grain weight resulting in higher grain and straw yield over conventional method of cultivation. The net return

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He, Z. H., J. Parajka, F. Q. Tian, and G. Blöschl. "Estimating degree day factors from MODIS for snowmelt runoff modeling." Hydrology and Earth System Sciences Discussions 11, no. 7 (2014): 8697–735. http://dx.doi.org/10.5194/hessd-11-8697-2014.

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Abstract. Degree-day factors are widely used to estimate snowmelt runoff in operational hydrological models. Usually, they are calibrated on observed runoff, and sometimes on satellite snow cover data. In this paper, we propose a new method for estimating the snowmelt degree-day factor (DDFS) directly from MODIS snow covered area (SCA) and ground based snow depth data without calibration. Subcatchment snow volume is estimated by combining SCA and snow depths. Snow density is estimated as the ratio of observed precipitation and changes in the snow volume for days with snow accumulation. Finally

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He, Z. H., J. Parajka, F. Q. Tian, and G. Blöschl. "Estimating degree-day factors from MODIS for snowmelt runoff modeling." Hydrology and Earth System Sciences 18, no. 12 (2014): 4773–89. http://dx.doi.org/10.5194/hess-18-4773-2014.

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Abstract. Degree-day factors are widely used to estimate snowmelt runoff in operational hydrological models. Usually, they are calibrated on observed runoff, and sometimes on satellite snow cover data. In this paper, we propose a new method for estimating the snowmelt degree-day factor (DDFS) directly from MODIS snow covered area (SCA) and ground-based snow depth data without calibration. Subcatchment snow volume is estimated by combining SCA and snow depths. Snow density is estimated to be the ratio between observed precipitation and changes in the snow volume for days with snow accumulation.

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Zhu, Zijuan, Zengxiang Zhang, Lijun Zuo, et al. "Study on the Classification and Change Detection Methods of Drylands in Arid and Semi-Arid Regions." Remote Sensing 14, no. 5 (2022): 1256. http://dx.doi.org/10.3390/rs14051256.

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The aim of this study was to clarify the distribution of irrigated drylands in arid and semi-arid areas, where complex terrain, diverse crops and staggered cultivated lands exist. This paper studied the classification methods of irrigated drylands based on temperature, precipitation, Normalized Difference Vegetation Index (NDVI) and Normalized Difference Water Index (NDWI) from Landsat data in the one-harvest area of the northern Loess Plateau of China by using the Google Earth Engine (GEE) platform. An extraction method was proposed for irrigated drylands in arid and semi-arid regions of nort

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Wang, Zhi, Jiajia Zhou, Linjian Song, and Long Li. "Experimental Study of Low Cycle Fatigue Properties for Epoxy Resins with Dibutyl Phthalate (Dbp)." Archives of Civil Engineering 64, no. 2 (2018): 147–59. http://dx.doi.org/10.2478/ace-2018-0021.

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AbstractIn order to improve the toughness of traditional epoxy resin, dibutyl phthalate (DBP) was introduced into the epoxy resin. The static mechanical performance of plasticized and unplasticized epoxy resin was evaluated. The test results showed that the DBP modified epoxy resin can obtain a higher toughness than conventional epoxy resin, but the elastic modulus and the tensile strength were slightly reduced. The low cycle fatigue test results indicated that the stress ratio and the stress level were two critical factors of fatigue life, which was increased with the growth of stress ratio.

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Tawde, Sayli Atul, Anil V. Kulkarni, and Govindasamy Bala. "An estimate of glacier mass balance for the Chandra basin, western Himalaya, for the period 1984–2012." Annals of Glaciology 58, no. 75pt2 (2017): 99–109. http://dx.doi.org/10.1017/aog.2017.18.

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ABSTRACTAn improved understanding of fresh water stored in the Himalaya is crucial for water resource management in South Asia and can be inferred from glacier mass-balance estimates. However, field investigations in the rugged Himalaya are limited to a few individual glaciers and short duration. Therefore, we have recently developed an approach that combines satellite-derived snowlines, a temperature-index melt model and the accumulation-area ratio method to estimate annual mass balance of glaciers at basin scale and for a long period. In this investigation, the mass balance of 146 glaciers i

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Sun, Yongshuai, Xinyan Zhong, Jianguo Lv, and Guihe Wang. "Experimental Study on Silt Soil Improved by Microbial Solidification with the Use of Lignin." Microorganisms 11, no. 2 (2023): 281. http://dx.doi.org/10.3390/microorganisms11020281.

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At present, in the field of geotechnical engineering and agricultural production, with increasingly serious pollution an environmentally friendly and efficient means is urgently needed to improve the soil mass. This paper mainly studied the microbial induced calcium carbonate precipitation (MICP) technology and the combined effect of MICP technology and lignin on the improvement of silt in the Beijing area. Through unconfined compressive strength and dynamic triaxial test methods, samples improved by microorganisms were studied to obtain the optimal values of cement concentration and lignin un

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Yao, Lili, Qing Wang, Jinbo Yang, et al. "UAV-Borne Dual-Band Sensor Method for Monitoring Physiological Crop Status." Sensors 19, no. 4 (2019): 816. http://dx.doi.org/10.3390/s19040816.

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Unmanned aerial vehicles (UAVs) equipped with dual-band crop-growth sensors can achieve high-throughput acquisition of crop-growth information. However, the downwash airflow field of the UAV disturbs the crop canopy during sensor measurements. To resolve this issue, we used computational fluid dynamics (CFD), numerical simulation, and three-dimensional airflow field testers to study the UAV-borne multispectral-sensor method for monitoring crop growth. The results show that when the flying height of the UAV is 1 m from the crop canopy, the generated airflow field on the surface of the crop cano

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Mehboob, Noman, Tauqeer Ahmad Yasir, Shahid Hussain, Shahid Farooq, Muhammad Naveed, and Mubshar Hussain. "Osmopriming Combined with Boron-Tolerant Bacteria (Bacillus sp. MN54) Improved the Productivity of Desi Chickpea under Rainfed and Irrigated Conditions." Agriculture 12, no. 8 (2022): 1269. http://dx.doi.org/10.3390/agriculture12081269.

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Chickpeas are rich source of protein and predominantly grown in boron (B)-deficient sandy-loam soils in Pakistan. Boron-tolerant bacteria (BTB) could tolerate higher B levels in soil and increase B availability to the plants. Field trials were conducted under irrigated (district Layyah) and rainfed (district Chakwal) conditions to evaluate the interactive effects of pre-optimized B application methods and BTB (Bacillus sp. MN54) on the nodule’s population, grain quality, productivity, and grain-B concentration in desi chickpea during 2019–2020 and 2020–2021. Boron was applied as soil applicati

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Zhai, Yunlong, Quanzhong Wu, Guodong Chen, Hailin Zhang, Xiaogang Yin, and Fu Chen. "Broadcasting Winter Wheat Can Increase Grain Yield without Reducing the Kernels per Spike and the Kernel Weight." Sustainability 10, no. 12 (2018): 4858. http://dx.doi.org/10.3390/su10124858.

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In North China, row spacing is the most common planting pattern used for winter wheat. Currently, there are three sowing and tillage methods for row spacing: rotary tillage sowing with straw return (RTS), subsoil tillage sowing with straw return (DTS), and no-tillage sowing with straw return (NTS). Recently, Hao proposed a new sowing pattern called uniform broadcast sowing with straw return (BSS) which could increase winter wheat yield. In this research, a field experiment was conducted during the growing seasons in 2011–2012 and 2012–2013. The winter wheat (Triticum aestivum L.) variety Jimai

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Cecato, Ulysses, Josmar Almeida Junior, Fabíola Cristine de Almeida Rego, et al. "Animal performance, production, and quality of Tanzania grass fertilized with nitrogen." Semina: Ciências Agrárias 38, no. 6 (2017): 3861. http://dx.doi.org/10.5433/1679-0359.2017v38n6p3861.

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This study aimed to assess forage production, animal performance, and the chemical composition of Tanzania grass pasture fertilized with 50, 100, 200, and 400 kg ha-1 of nitrogen. The variables analyzed were: leaf mass, daily accumulation rate, leaf/stem ratio, average daily gain, stocking rate, live weight gain per unit of area crude protein, neutral detergent fiber, and in vitro dry matter digestibility of leaves. The pasture management maintained the pasture height at 50 cm by using a continuous grazing method with the adjustment of stocking rate. The experimental design was a randomized bl

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Li, Xiang, Ninglian Wang, and Yuwei Wu. "Automated Glacier Snow Line Altitude Calculation Method Using Landsat Series Images in the Google Earth Engine Platform." Remote Sensing 14, no. 10 (2022): 2377. http://dx.doi.org/10.3390/rs14102377.

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Glacier snow line altitude (SLA) at the end of the ablation season is an indicator of the equilibrium line altitude (ELA), which is a key parameter for calculating and assessing glacier mass balance. Here, we present an automated algorithm to classify bare ice and snow cover on glaciers using Landsat series images and calculate the minimum annual glacier snow cover ratio (SCR) and maximum SLA for reference glaciers during the 1985–2020 period in Google Earth Engine. The calculated SCR and SLA values are verified using the observed glacier accumulation area ratio (AAR) and ELA. We select 14 ref

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Mezzomo, Roberto F., Jose M. Luvizotto, and Cesar L. Palagi. "Improved Oil Recovery in Carmópolis Field: R&D and Field Implementations." SPE Reservoir Evaluation & Engineering 4, no. 01 (2001): 4–10. http://dx.doi.org/10.2118/69811-pa.

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Summary Carmópolis field, in northeastern Brazil's Sergipe/Alagoas basin, is the country's largest onshore oil accumulation at 253×106 m3 original oil in place (OOIP) and a current total oil production of 2880 m3/d. Discovered in 1963, it was quickly put into primary production. Waterflooding followed in 1971 at the central portion of the field. The combination of adverse fluid mobility ratio, reservoir heterogeneity, and the lack of proper selective injection led to the quick decline of production; however, a major program of selective plugging, stimulation, and selective injection was able t

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Hai, Yang, Ling Zuo, Meng Wang, et al. "Icariin Alleviates Nonalcoholic Fatty Liver Disease in Polycystic Ovary Syndrome by Improving Liver Fatty Acid Oxidation and Inhibiting Lipid Accumulation." Molecules 28, no. 2 (2023): 517. http://dx.doi.org/10.3390/molecules28020517.

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(1) Background: Icariin is the main component of the Chinese herb Epimedium. A number of studies have shown that it alleviates abnormal lipid metabolism. However, it is not clear whether and how icariin can ameliorate hepatic steatosis with polycystic ovary syndrome (PCOS). This study was designed to explore the anti-hepatosteatosis effect of icariin in rats with polycystic ovary syndrome. (2) Methods: Female Sprague Dawley(SD)rats were treated with a high-fat diet and letrozole for 21 days to make nonalcoholic fatty liver disease (NAFLD) in the polycystic ovary syndrome model. Then model rats

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Wang, Jiaqiang, Jie Peng, Hongyi Li, et al. "Soil Salinity Mapping Using Machine Learning Algorithms with the Sentinel-2 MSI in Arid Areas, China." Remote Sensing 13, no. 2 (2021): 305. http://dx.doi.org/10.3390/rs13020305.

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Accurate monitoring of soil salinization plays a key role in the ecological security and sustainable agricultural development of arid regions. As a branch of artificial intelligence, machine learning acquires new knowledge through self-learning and continuously improves its own performance. The purpose of this study is to combine Sentinel-2 Multispectral Imager (MSI) data and MSI-derived covariates with measured soil salinity data and to apply three machine learning algorithms in modeling to estimate and map the soil salinity in the study sample area. According to the convenient transportation

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Rastner, Philipp, Rainer Prinz, Claudia Notarnicola, et al. "On the Automated Mapping of Snow Cover on Glaciers and Calculation of Snow Line Altitudes from Multi-Temporal Landsat Data." Remote Sensing 11, no. 12 (2019): 1410. http://dx.doi.org/10.3390/rs11121410.

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Mapping snow cover (SC) on glaciers at the end of the ablation period provides a possibility to rapidly obtain a proxy for their equilibrium line altitude (ELA) which in turn is a metric for the mass balance. Satellite determination of glacier snow cover, derived over large regions, can reveal its spatial variability and temporal trends. Accordingly, snow mapping on glaciers has been widely applied using several satellite sensors. However, as glacier ice originates from compressed snow, both have very similar spectral properties and standard methods to map snow struggle to distinguish snow on

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Jiao, Huazhe, Wenbo Yang, Huiming Shen, Yingjie Yang, and Juanhong Liu. "Study on Multi-Layer Filling Treatment of Extra-Large Goaf and Its Underground Application." Materials 15, no. 16 (2022): 5680. http://dx.doi.org/10.3390/ma15165680.

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At present, the many domestic, large mined-out areas caused by single filling ability of the slurry flow state, thin layer flow and hardening after filling in multilayer structure generally need to finish filling for many times, because after a filling experience shows that filling body in the last solidification of flow, this leads to a lower one side of the roof, and far distance part of the filling body cannot pick up top. The determination of backfill strength is the key problem of the cemented backfill method, and it is affected by many factors. Therefore, through theoretical calculation,

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Huseby, Olaf K., Mona Andersen, Idar Svorstol, and Oyvind Dugstad. "Improved Understanding of Reservoir Fluid Dynamics in the North Sea Snorre Field by Combining Tracers, 4D Seismic, and Production Data." SPE Reservoir Evaluation & Engineering 11, no. 04 (2008): 768–77. http://dx.doi.org/10.2118/105288-pa.

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Summary To obtain improved oil recovery (IOR), it is crucial to have a best-possible description of the reservoir and the reservoir dynamics. In addition to production data, information can be obtained from 4D seismic and from tracer monitoring. Interwell tracer testing (IWTT) has been established as a proven and efficient technology to obtain information on well-to-well communication, heterogeneities, and fluid dynamics. During such tests, chemical or radioactive tracers are used to label water or gas from specific wells. The tracers then are used to trace the fluids as they move through the

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Kurita, Hisatsugu, Masataka Nakamura, Hayato Miyagawa, and Yoshiaki Kamigaki. "Effect of N₂-Anneal Temperature on Silicon Nitride Film: (I) Time-Dependent Dielectric Breakdown and ESR Evaluations." ECS Meeting Abstracts MA2022-01, no. 28 (2022): 1250. http://dx.doi.org/10.1149/ma2022-01281250mtgabs.

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Silicon Nitride (SiN) film has been used as insulating material in many electronic devices such as capacitors and memories . In this report, the effect of N2 anneal temperature on charge break down (Qbd) of LP-CVD SiN film was electrically evaluated using the time-dependent dielectric breakdown (TDDB) test method, and the variation and the density of defects which exist in SiN film, in the oxide layer between SiN and Si substrate, and at the surface of Si substrate, were investigated using an Electron Spin Resonance (ESR) to reveal the defect behavior related to the trigger of Qbd. SiN metal-i

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Liu, Hui, Fabio Fiorani, Ortrud Jäck, Tino Colombi, Kerstin A. Nagel, and Martin Weih. "Shoot and Root Traits Underlying Genotypic Variation in Early Vigor and Nutrient Accumulation in Spring Wheat Grown in High-Latitude Light Conditions." Plants 10, no. 1 (2021): 174. http://dx.doi.org/10.3390/plants10010174.

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Plants with improved nutrient use efficiency are needed to maintain and enhance future crop plant production. The aim of this study was to explore candidate traits for pre-breeding to improve nutrient accumulation and early vigor of spring wheat grown at high latitudes. We quantified shoot and root traits together with nutrient accumulation in nine contrasting spring wheat genotypes grown in rhizoboxes for 20 days in a greenhouse. Whole-plant relative growth rate was here correlated with leaf area productivity and plant nitrogen productivity, but not leaf area ratio. Furthermore, the total lea

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Tang, G., X. Zhu, B. Hu, et al. "Vertical variations of aerosols and the effects responded to the emission control: application of lidar ceilometer in Beijing during APEC, 2014." Atmospheric Chemistry and Physics Discussions 15, no. 9 (2015): 13173–209. http://dx.doi.org/10.5194/acpd-15-13173-2015.

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Abstract. During the 2014 Asia-Pacific Economic Cooperation (APEC) summit, a reduction of air pollution sources was coordinated to ensure good air quality in Beijing and the surrounding provinces and cities. By investigating variations in air pollution during this period, the effects of local emissions and regional transport can be better understood and the information can be used to evaluate the effectiveness of emission reduction strategies and provide a theoretical basis to guide future emission reduction strategies. From 15 October to 30 November 2014, the height of the atmospheric mixing

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Lou, Haiyang, Rujiang Hao, Jianchao Zhang, and Qiang Xue. "Application of Improved Phase Lock Method in Weak Signal Extraction." Mathematical Problems in Engineering 2022 (February 25, 2022): 1–17. http://dx.doi.org/10.1155/2022/9137927.

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The existing method of the weak signal under the background of strong noise (signal amplitude relative to the noise amplitude is much smaller) analysis is not very ideal. This study proposes an improved phase lock method to analyze the weak periodic signal under Gaussian white noise. Experimental results show that this method can better analyze weak signal-related information than the stochastic resonance method in a certain range of signal-to-noise ratio, and the amount of calculation is small, and the correlation theory is simple and adapted to the rapid detection of the signal; in order to

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Cramer, GR, GJ Alberico, and C. Schmidt. "Leaf Expansion Limits Dry Matter Accumulation of Salt-Stressed Maize." Functional Plant Biology 21, no. 5 (1994): 663. http://dx.doi.org/10.1071/pp9940663.

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Two maize (Zea mays L.) hybrids, differing in their salt tolerance (percentage of control on a dry weight basis) and ability to accumulate Na+ in the shoot, were treated with 80 mol m-3 NaCl salinity or 80 mol m-3 NaCl plus 8.75 mol m-3 CaCl2. Multiple harvests were performed and the interactions of salinity with time were examined with growth analysis. Relative growth rate (RGR) and leaf area ratio (LAR) were significantly reduced by NaCl salinity, but net assimilation rate (NAR) was unaffected. Supplemental Ca2+ improved RGR by maintaining LAR closer to control values. LAR was inhibited in t

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Odongo, Rhoda A., Hans De Moel, and Anne F. Van Loon. "Propagation from meteorological to hydrological drought in the Horn of Africa using both standardized and threshold-based indices." Natural Hazards and Earth System Sciences 23, no. 6 (2023): 2365–86. http://dx.doi.org/10.5194/nhess-23-2365-2023.

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Abstract. There have been numerous drought propagation studies in data-rich countries, but not much has been done for data-poor regions (such as the Horn of Africa, HOA). In this study, we characterize meteorological, soil moisture and hydrological drought and the propagation from one to the other for 318 catchments in the HOA to improve understanding of the spatial variability in the drought hazard. We calculate the standardized precipitation index (SPI), standardized soil moisture index (SSMI) and standardized streamflow index (SSI). In addition, we use the variable threshold method to calcu

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Wang, Cheng, and Bing Yi Li. "CVT Ratio Adjusting Process Control." Advanced Materials Research 139-141 (October 2010): 1929–32. http://dx.doi.org/10.4028/www.scientific.net/amr.139-141.1929.

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Aiming at the shortcoming of the integral accumulation in the process of CVT ratio adjusting control, which is caused by the general PID control method, a new ratio adjusting control system based on the shift integral PID control method was designed. The theory of CVT ratio adjusting process and the enhanced control method were analized. The enhanced PID parameter tuning principle was presented. The test-bed of CVT ratio adjusting control was devised and adopted to do the CVT ratio tracing experiments. The experiments of step ratio from 0.45 to 1.45 and from 1.7 to 0.7 were made. The experimen

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Kopylov, K. V., and K. V. Kopylova. "STUDY OF NON-CODING AREAS OF THE DNA GENOME OF DIFFERENT ANIMAL SPECIES." Animal Breeding and Genetics 65 (July 3, 2023): 184–90. http://dx.doi.org/10.31073/abg.65.17.

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The introduction to the review article contains information that the genome is the totality of the DNA of a species, that is, the totality of all genes, non-coding regions of nuclear DNA and extrachromosomal genetic material, which includes mitochondrial, plastid DNA, plasmids, etc. An exon is a stretch of DNA within a gene that is translated into a mature matrix RNA (mRNA) molecule by transcription and splicing. They are separated by non-coding sequences (introns), that is, sections of DNA that are part of the gene, but, unlike exons, do not contain information about the amino acid sequence.

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Chen, Hai Ying, and Yin Yin Zhou. "An Improved Texture Compression Method for Graphics Hardware." Applied Mechanics and Materials 63-64 (June 2011): 444–48. http://dx.doi.org/10.4028/www.scientific.net/amm.63-64.444.

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In this paper, we proposed an improved texture compression method for graphics hardware. We first give a detail introduction for the texture compression methods which are popular now. Then, an MIPMap-based texture compression method is proposed that is hybrid compression scheme. For smooth area, we can only use 2Bytes to represent the 4*4 pixels block by bilinear interpolation. Otherwise, we will use iPACKMAN algorithm to deal with the noise areas. Actually, this method is feasible to be implemented by hardware since it is very simple. Experimental results show that our method can achieve high

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Roussel, Camille, Alexandre Morel, Michaël Dussiot, et al. "Storage-Induced Micro-Erythrocytes Are Rapidly Cleared from Recipient Circulation and Predict Transfusion Recovery." Blood 134, Supplement_1 (2019): 717. http://dx.doi.org/10.1182/blood-2019-128161.

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Background Hypothermic storage of red blood cell (RBC) concentrates for up to 42 days is associated with biochemical, molecular, morphological, and mechanical modifications. This "storage lesion" increases with storage duration and is associated with increased clearance of transfused storage-damaged RBCs from the recipient's circulation in the first few hours post-transfusion. This rapid clearance reduces transfusion efficacy, but how it occurs is not fully elucidated. RBCs with reduced surface area called "storage-induced micro-erythrocytes" (SMEs) were recently described. Their proportion in

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Zhao, Dawei, Jun Wang, Luo Zuo, and Jipeng Wang. "A Novel Cross-Correlation Algorithm Based on the Differential for Target Detection of Passive Radar." Remote Sensing 15, no. 1 (2022): 224. http://dx.doi.org/10.3390/rs15010224.

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For the problem of traditional passive radar target detection, the cross-correlation method is a popular solution. By processing the reference signal and the target echo signal coherently, the method is able to extract the target parameters, such as distance, velocity, and azimuth. However, the estimation performance is limited by the low signal-to-noise ratio. Therefore, a new cross-correlation algorithm for passive radar target detection is proposed in this paper. The echo signal received by the echo antenna and the reference signal received by the reference antenna are processed by differen

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Deleu, S., B. Trindade de Carvalho, I. Jacobs, et al. "P079 Attenuation of inflammation and histologic production-dependent improvement by engineered high acetate producing Saccharomyces boulardii in DSS-induced colitis." Journal of Crohn's and Colitis 17, Supplement_1 (2023): i243—i245. http://dx.doi.org/10.1093/ecco-jcc/jjac190.0209.

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Abstract Background It has been hypothesized that the probiotic potential of the yeast Saccharomyces boulardii (Sb) is associated with its acetate production. This SCFA is of interest in IBD due to its cross-feeding potential with beneficial butyrate-producing bacteria and low toxicity to epithelial cells . Our previous in vitro work supports this hypothesis (Deleu et al, 2022) but still requires in vivo validation. Therefore, we evaluated the effect of different engineered Sb strains producing variable amounts of acetate in DSS-induced colitis in mice. Methods Nine week old female C57/Bl6 mic

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Wan, M., Y. Guo, S. Li, and T. Liu. "METHOD OF IMPROVED TDICCD DESIGN BASED ON SENSOR CLOCKING." ISPRS Annals of Photogrammetry, Remote Sensing and Spatial Information Sciences V-3-2020 (August 3, 2020): 689–93. http://dx.doi.org/10.5194/isprs-annals-v-3-2020-689-2020.

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Abstract. The final output signal quality of TDICCD is related to the key parameters such as working mode, output mode, signal-to-noise ratio, dynamic range and so on. We can improve these parameters of TDICCD by reasonably designing the sensor clocking. Therefore, this text discussed four methods of improved TDICCD sensor clocking to solve some problem in TDICCD application based on using the principle of TDICCD. The technique of TDICCD Taps merging can reduce the number of TDICCD Taps, which helps to reduce the size of the TDICCD rear-end circuit significantly; The technique of TDICCD contin

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Pelto, Mauri S. "The Annual Balance of North Cascade Glaciers, Washington, U.S.A., Measured and Predicted Using An Activity-Index Method." Journal of Glaciology 34, no. 117 (1988): 194–99. http://dx.doi.org/10.1017/s0022143000032238.

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AbstractThe annual balance has been measured for ten North Cascade glaciers in 1983–84, 1984–85, 1985–86, and 1986–87 (1984, 1985, 1986, and 1987). Based on these data, an annual balance prediction method was designed and tested. Comparison of measured versus predicted annual balances indicates an accuracy of ±0.22–0.30 m. The method is based on annual measurement of the accumulation area ratio (AAR), and determination of the perennially constant activity index and area-altitude distribution on each glacier. The accumulation area ratio is determined from aerial and ground photographs at the en

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Pelto, Mauri S. "The Annual Balance of North Cascade Glaciers, Washington, U.S.A., Measured and Predicted Using An Activity-Index Method." Journal of Glaciology 34, no. 117 (1988): 194–99. http://dx.doi.org/10.3189/s0022143000032238.

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AbstractThe annual balance has been measured for ten North Cascade glaciers in 1983–84, 1984–85, 1985–86, and 1986–87 (1984, 1985, 1986, and 1987). Based on these data, an annual balance prediction method was designed and tested. Comparison of measured versus predicted annual balances indicates an accuracy of ±0.22–0.30 m. The method is based on annual measurement of the accumulation area ratio (AAR), and determination of the perennially constant activity index and area-altitude distribution on each glacier. The accumulation area ratio is determined from aerial and ground photographs at the en

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Mukhopadhyay, Biswajit, and Asif Khan. "Altitudinal variations of temperature, equilibrium line altitude, and accumulation-area ratio in Upper Indus Basin." Hydrology Research 48, no. 1 (2016): 214–30. http://dx.doi.org/10.2166/nh.2016.144.

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Quantitative measures of adiabatic lapse rate, equilibrium line altitude (ELA), and accumulation-area ratio (AAR) are important to understand the hydrological processes and conduct hydrological modeling in a highly glaciated watershed. We present a detailed analysis of temperature data from 21 climatic stations, hypsometric analyses of glacier distributions, and a method to analyze ablation gradients and runoff curves concurrently to quantify these parameters for the watersheds of the Upper Indus Basin (UIB), with 15,062 km2 of glacierized area and an elevation range of 361–8,611 m. We show th

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Kircher, Moritz F., Lee Josephson, and Ralph Weissleder. "Ratio Imaging of Enzyme Activity Using Dual Wavelength Optical Reporters." Molecular Imaging 1, no. 2 (2002): 153535002002011. http://dx.doi.org/10.1162/15353500200201124.

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The design of near-infrared fluorescent (NIRF) probes that are activated by specific proteases has, for the first time, allowed enzyme activity to be imaged in vivo. In the current study, we report on a method of imaging enzyme activity using two fluorescent probes that, together, provide improved quantitation of enzymatic activity. The method employs two chemically similar probes that differ in their degradability by cathepsin B. One probe consists of the NIRF dye Cy5.5 attached to a particulate carrier, a crosslinked iron oxide nanoparticle (CLIO), through cathepsin B cleavable l-arginyl pep

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Wang, Fang, Yang Chao, Ming Han Xu, et al. "Preparation of Tin Oxide Nanometer Thin Films by Hydrothermal Method." Solid State Phenomena 279 (August 2018): 197–201. http://dx.doi.org/10.4028/www.scientific.net/ssp.279.197.

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Given the shortage of energy reserves, new energy sources must be identified. In this regard, improving the efficiency of solar cell conversion and simplifying the solar cell technology have become the focus of research. In this study, tin oxide nanometer thin film was fabricated on FTO conductive glass as photocathode through hydrothermal method. The synthesis condition was regulated, and performance test was also conducted. Results show that the crystallization driving force, crystallization rate, and grain size of tin dioxide crystal increase with increasing alkali ratio, leading to disorga

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Xi, Jian Hui, and Jia Chen. "An Improved Noise Reduction Based on Wavelet Threshold." Key Engineering Materials 474-476 (April 2011): 1701–5. http://dx.doi.org/10.4028/www.scientific.net/kem.474-476.1701.

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Based on multi-resolution analysis of wavelet, this article is aimed at building a new soft threshold function for wavelet de-noising, to overcome the discontinuous disadvantage of the hard threshold function. In the area adjacent to the threshold, continuously adjustable nonlinear functions are introduced in piecewise to process the wavelet coefficients more carefully in this area. Consequently, large deviation caused by super-compression of wavelet coefficients when using traditional soft threshold could be avoided, and the nonlinearity of the system is able to be effectively kept. Using bot

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Faria, O. A. C., T. S. Kawamoto, L. R. O. Dias, et al. "200 Maturation method affects lipid accumulation in bovine oocytes." Reproduction, Fertility and Development 32, no. 2 (2020): 228. http://dx.doi.org/10.1071/rdv32n2ab200.

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Invitro maturation is a key step in invitro embryo production, since its success will depend on the availability of good quality oocytes. Previous studies have shown that it is during this stage that the greatest accumulation of lipid droplets occurs, which is reflected in the amount of lipid present in embryos produced invitro. However, this is not observed when maturation is performed invivo. Therefore, we hypothesised that lipid accumulation would be avoided if oocyte maturation were carried out in ovarian follicles following intrafollicular transfer of immature oocytes (IFIOT). We compared

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Liu, Ya Jie, Yan Zhao, and Fa Lin Wu. "An Improved Geomagnetic Matching Algorithm Using Rotation Angle Search Technique." Advanced Materials Research 383-390 (November 2011): 7576–81. http://dx.doi.org/10.4028/www.scientific.net/amr.383-390.7576.

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The accumulation course angle error of inertial navigation system will decrease the accuracy and reliability of an geomagnetism aided inertial navigation system using a geomagnetic contour matching algorithm. To improve the matching accuracy, the matching track and true track should be as parallel as possible. An improved geomagnetic matching algorithm is presented by introducing rotation angle search technique. To reduce the computation burden, improve operation efficiency and reduce false matching probability, a new search area determination method is proposed, which redefines the search reg

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Fan, Xiangsuo, Zhiyong Xu, Jianlin Zhang, Yongmei Huang, and Zhenming Peng. "Infrared Dim and Small Targets Detection Method Based on Local Energy Center of Sequential Image." Mathematical Problems in Engineering 2017 (2017): 1–16. http://dx.doi.org/10.1155/2017/4572147.

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In order to detect infrared (IR) dim and small targets in a strong clutter background, a method based on local energy center of sequential image is proposed. This paper began by using improved anisotropy for background prediction (IABP), followed by target enhancement by improved high-order cumulates (HOC). Finally, on the basis of image preprocessing, the paper constructs a sequential image energy center detection algorithm that integrates the neighborhood, continuity, area, and energy and other motion characteristics of the target. Experiments showed that the improved anisotropic background

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Liu, Li Yan, Rong Fu, Yi He, and Ying Qian Zhang. "Deployment Strategy in Distributed Underwater Sensor Networks." Applied Mechanics and Materials 602-605 (August 2014): 3643–47. http://dx.doi.org/10.4028/www.scientific.net/amm.602-605.3643.

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Distributed underwater sensor network coverage is divided into two main categories: deterministic coverage and stochastic coverage. A strategy is put forward to deploy determinate area by using a triangular-grid method. When a coverage ratio is known, the distance between nodes can be adjusted to meet the coverage ratio in the monitored area, and the least number of sensor nodes can be calculated. Also a heuristic method is proposed for stochastic area deployment strategy. It is under the premise that the initial node location randomly deployed is given, using Voronoi diagram, the not easiest

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Dai, Yan, Dan Liu, Qingrong Hu, and Xiaoli Yu. "Radar Target Detection Algorithm Using Convolutional Neural Network to Process Graphically Expressed Range Time Series Signals." Sensors 22, no. 18 (2022): 6868. http://dx.doi.org/10.3390/s22186868.

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Under the condition of low signal-to-noise ratio, the target detection performance of radar decreases, which seriously affects the tracking and recognition for the long-range small targets. To solve it, this paper proposes a target detection algorithm using convolutional neural network to process graphically expressed range time series signals. First, the two-dimensional echo signal was processed graphically. Second, the graphical echo signal was detected by the improved convolutional neural network. The simulation results under the condition of low signal-to-noise ratio show that, compared wi

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Zhang, Yi, and Jinli Huang. "Structure of the Sediment and Crust in the Northeast North China Craton from Improved Sequential H-k Stacking Method." Open Geosciences 11, no. 1 (2019): 682–96. http://dx.doi.org/10.1515/geo-2019-0054.

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Abstract H-k stacking method is a standard receiver-function method to detect crustal thickness. But this method can not be applied in low-velocity sedimentary basins. To solve this problem, we propose an improved sequential H-k stacking method. The improved method needs two sequential stacks. Firstly, sediment structure is calculated using converted waves and multiples on the bottom boundary of sediments. Secondly, the sedimentary results are applied to calculate the crustal structure. Theoretical calculations and “recovery tests” indicate that the improved method can obtain accurate estimate

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Zhang, Yiyi, Keshuo Shi, Chunyan Zang, Wenchang Wei, Chuanhui Xu, and Junwei Zha. "Improved Insulation Properties of Polypropylenes in HVDC Cables Using Aqueous Suspension Grafting." Materials 15, no. 18 (2022): 6298. http://dx.doi.org/10.3390/ma15186298.

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Owing to its lack of crosslinking, polypropylene (PP) is considered an environmentally friendly alternative to crosslinked polyethylene as high-voltage direct current (HVDC) cable insulation. However, pure PP can accumulate space charges under a HVDC, and thus must be modified for use as an insulating material for HVDC cables. In this study, 4-methylstyrene is grafted onto PP using an aqueous suspension grafting method to improve its properties. The effects of the swelling time, reaction time, and 4-methylphenylene concentration on the reaction were investigated. The optimum process conditions

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Qin, Hongde, Lingyu Li, Peng Li, and Xiangqian Wang. "Hydrodynamic performance optimization and experimental verification of underwater glider based on parametric method." Science Progress 105, no. 4 (2022): 003685042211313. http://dx.doi.org/10.1177/00368504221131380.

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In this paper, the wing body fusion method is used to complete the design of underwater glider. On this basis, the traditional optimization algorithm of underwater gliding wing shape is improved. Based on the improved Hicks Henne algorithm and genetic algorithm, the shape optimization of underwater glider is completed. Through the further optimization of the overall performance, the overall shape of the glider is improved and the maximum lift drag ratio is increased. Finally, the physical experiment of the optimized shape is carried out according to the experimental water area of the circulati

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Wang, Yanjun, Gang Li, Wenjuan Yan, Guoquan He, and Ling Lin. "Heterogeneity Detection Method for Transmission Multispectral Imaging Based on Contour and Spectral Features." Sensors 19, no. 24 (2019): 5369. http://dx.doi.org/10.3390/s19245369.

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Transmission multispectral imaging (TMI) has potential value for medical applications, such as early screening for breast cancer. However, because biological tissue has strong scattering and absorption characteristics, the heterogeneity detection capability of TMI is poor. Many techniques, such as frame accumulation and shape function signal modulation/demodulation techniques, can improve detection accuracy. In this work, we develop a heterogeneity detection method by combining the contour features and spectral features of TMI. Firstly, the acquisition experiment of the phantom multispectral i

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Zhao, Gaofeng, Hao Zheng, Yingying Li, Kehui Zhu, and Jianfeng Li. "A Frequency Domain Direct Localization Method Based on Distributed Antenna Sensing." Wireless Communications and Mobile Computing 2021 (June 1, 2021): 1–10. http://dx.doi.org/10.1155/2021/6616729.

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Traditional two-step passive localization methods need to extract the parameters like the direction of arrival (DOA), time of arrival (TOA), and time difference of arrival (TDOA) from the original data to determine the source position, which causes the poor positioning accuracy due to error accumulation. In this paper, a direct position determination (DPD) method is proposed to improve the positioning accuracy and robustness, which is based on a correlation algorithm. Firstly, the cost function directly related to the location of the source can be established by synthesizing the data received

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von Windheim, Jesko A., and Jeffrey T. Glass. "Improved uniformity and selected area deposition of diamond by the oxy-acetylene flame method." Journal of Materials Research 7, no. 8 (1992): 2144–50. http://dx.doi.org/10.1557/jmr.1992.2144.

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The role of SiO2 in nucleation of diamond has been investigated in an oxy-acetylene flame. It was found that growth methods that minimize SiO2 formation enhance diamond nucleation. A short pretreatment of a scratched Si surface in a low oxygen-to-acetylene ratio flame, at a distance 1.5 cm from the flame core, significantly improved uniformity of subsequent diamond growth. When scratched surfaces were intentionally oxidized, nucleation of diamond was completely inhibited. By using a mask to controllably deposit SiO2 on a scratched Si surface, highly selective deposition of diamond was achieved

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