Results 131 to 140 of about 1,576 (194)

Research on the Chip Process of Innovative High-Efficiency Multi-Junction Concentrator Solar Cells

open access: yes, 2016
多结太阳能电池在各类光伏电池中具有最高的转化效率,因此成为太阳能电池发展的重要方向,广泛应用于空间电源与聚光光伏领域。新型多结太阳能电池的发展越来越需要对芯片结构进行改进。本文对新型多结太阳能电池芯片制程中的关键工艺进行了研究,主要取得以下成果: 1、 进行了多结太阳能电池在一定光照条件下的正面电池结构设计优化。 2、 建立了多结太阳能电池的光学模拟模型,以此为基础优化了中电池window层结构,提升了中电池的外量子效率。优化了减反射膜结构,实现了对子电池电流密度的精细调整 ...
刘冠洲
core  

双城市土壤重金属空间分异及影响因子分析

open access: yesShuitu Baochi Xuebao, 2007
采用地理信息系统(GIS)和地统计学相结合的方法,研究了黑龙江省双城市的土壤全量铜、锌、铅、镍、镉5种重金属元素的空间分异规律及其影响因子。结果表明:研究区土壤锌、镍、镉具有强烈的空间相关性,表明这3种元素受土壤内在属性影响较大;而铜、铅具有中等强度的空间相关性,表明这2种元素由土壤内在属性和人为因素共同起作用。镉、铅、铜较锌、镍的变程小,说明前3种重金属元素含量可能主要受到较小尺度因子的影响。研究区土壤各重金属元素空间分异规律如下:铜和镍呈东高西低的趋势,铅呈南高北低的趋势 ...
史文娇   +4 more
doaj  

[Application of carbon dots in analysis and detection of antibiotics]. [PDF]

open access: yesSe Pu, 2021
Chai P   +6 more
europepmc   +1 more source

[Development of novel drug carrier via round window membrane]. [PDF]

open access: yesLin Chuang Er Bi Yan Hou Tou Jing Wai Ke Za Zhi, 2021
Xiao L, Liu C, Xia L, Feng Y.
europepmc   +1 more source

LEGISLATIVE AND INSTITUTIONAL FRAMEWORK FOR THE FOOD SAFETY CONTROL OF LIVE ANIMALS IN CHINA [PDF]

open access: yes
In 2002, both China and the EU suffered from a trade dispute over animal products. The aim of the report is to document this framework, in order to make a constructive contribution towards bridging the gap of understanding and accessibility of the ...
van den Roest, Joop, Zhang, Xiaoyong
core   +1 more source

[Latest Research Findings on Health Management Based on Saliva Testing]. [PDF]

open access: yesSichuan Da Xue Xue Bao Yi Xue Ban, 2022
Liang XY, Du XM, Zhou XD.
europepmc   +1 more source

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