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探测无中微子双贝塔衰变的PandaX-Ⅲ实验需要一个能同时对多个Micromegas探测器的增益、能量分辨、坏道分布、位置分辨等性能参数进行测试的平台，为此中国原子能科学研究院建立了PandaX-Ⅲ实验探测器测试平台。本文采用由光蚀刻技术制作的Bulk Micromegas对该测试平台进行研究：利用55Fe放射源在Ar+10%CO2的流气情况下，使用基于AGET读出芯片制作的通用读出电子学进行数据...
利用光蚀刻技术制作的有效面积为10 cm×10 cm的多通道Bulk Micromegas探测器。对探测器的各通道进行了电容测试，显示探测器在Ar + 10％CO 2气体中，使用55 Fe放射源和自主开发的基于APV25前端卡的数字化电子学，对制作的有效面积为10 cm×10 cm的探测器进行。该探测器现有全部工艺国产化，并能进行批量生产，成品率接近100％。了测试，其结果显示探测器性能良好，能得...
Reliability measures of electrical grid has risen to a new norm as it involves physical security and cybersecurity. Threats to either can trigger instability, leading to blackouts and economic losses....
Research on Parallel Bulk-Loading R-Trees Based on Partition Technology of Database
Spatial Index R-Tree Partition Parallel Computing
2015/12/18
Research on Parallel Bulk-Loading R-Trees Based on Partition Technology of Database.
Extended finite element framework for fault rupture dynamics including bulk plasticity
extended finite elements fault rupture dynamics bulk plasticity
2015/7/1
We present an explicit extended finite element framework for fault rupture dynamics accommodating bulk plasticity near the fault. The technique is more robust than the standard split-node method becau...
An extended finite element framework for slow-rate frictional faulting with bulk plasticity and variable friction
extended finite element friction fault plasticity
2015/7/1
We present an extended finite element (FE) approach for the simulation of slow-rate frictional faulting in geologic media incorporating bulk plasticity and variable friction. The method allows the fau...
Manipulating Block Copolymer Self-Assemblies in Bulk and Thin Films by Thermal and Solvent Annealing
Pure sciences Applied sciences Annealing Block copolymers Bulk Nanopatterning Self-assembly Thin film
2014/11/21
The self-assembly of block copolymers (BCPs) into well-ordered nanoscopic arrays holds promise for new technological breakthroughs as templates and scaffolds for the fabrication of nanostructured mate...
Identification and classification of bulk paddy, brown, and white rice cultivars with colour features extraction using image analysis and neural network
stepdisc analysis HSI HSV back propagation algorithm, bulk images
2014/7/10
We identify five rice cultivars by mean of developing an image processing algorithm. After preprocessing operations, 36 colour features in RGB, HSI, HSV spaces were extracted from the images. These 36...
Silage-corn harvesting machinery traffi c eff ects on soil bulk density and water permeability
repeated traffi c passes silage harvester soil compaction soil physical damage soil porosity
2014/2/24
Soil compaction caused by machinery traffi c aff ects the growth of agricultural crops and also has environmental eff ects
like soil damage and erosion. Field experiments were cond...
Using the Dual Energy Gamma-Ray Transmission Technique to Measure Soil Bulk Density and Water Content of Central Southwestern Nigerian Soils
Dual Energy Gamma-Ray Bulk Density Water Content Radiological Attenuation Coefficient
2013/3/12
In this work, a radiological technique which simultaneously measures soil bulk density and water contents accurately and quickly in a non-destructive manner at different depths of the soil profile of ...
Bulk Intergrowth of a Topological Insulator with a Room Temperature Ferromagnet
Bulk Intergrowth Topological Insulator Room Temperature Ferromagnet
2012/2/24
We demonstrate that the layered room temperature ferromagnet Fe7Se8 and the topological insulator Bi2Se3 form crystallographically oriented bulk composite intergrowth crystals. The morphology of the i...
The Improvement of Bulk-Heterojunction Order in Polymer Photovoltaic Device
Polymer photovoltaic device Bulk-heterojunction Annealing method
2012/4/12
The blend morphology and vertical arrangement are critical to the performance of organic bulk-heterojunction photovoltaic devices. In the present paper, the authors proposed a new annealing method tha...
通过数值计算分析了叶轮偏心情况下前侧盖板泄漏流流体的稳态特性。基于一种bulk-flow模型建立了由3个非线性偏微分方程组成的流体控制方程。运用有限差分方法和交错网格得到离散化的控制方程，利用SIMPLE算法来完成对离散化控制方程的求解。根据计算结果给出了给定条件下叶轮前侧盖板泄漏流流体的稳态压力分布和速度分布，并分析了叶轮前侧盖板与蜗壳间间隙和叶轮偏心率对叶轮前侧盖板泄漏流流体的稳态压力分布和速...
Mid-IR-laser microscopy as a tool for defect investigation in bulk semiconductors
Mid-IR-laser microscopy defect investigation bulk semiconductors
2011/9/9
A non-destructive optical technique described in this paper is an effective new tool for the investigation of defects in semiconductors. The basic instrument for this technique—a mid-IR-laser microsco...
Influence of Photoexcitation Depth on Luminescence Spectra of Bulk GaAs Single Crystals and Defect Structure Characterization
Photoexcitation Luminescence Spectra Bulk GaAs Single Crystals Defect Structure Characterization
2011/9/9
The results of investigation of bulk GaAs photoluminescence are presented taken from near-surface layers of different thicknesses using for excitation the light with the wavelengths which are close bu...