Results 51 to 60 of about 13,881 (165)
Optimization of IMU-based bending strain solving algorithm and full-scale experimental validation [PDF]
Objective The pipe bending strain identification technology based on an inertial mapping unit (IMU) in-line detector has seen extensive applications in China and abroad.
Jun WANG +7 more
core +1 more source
Shuitu Baochi Xuebao, 2008 为有效防治坡耕地水土流失,提高坡耕地持续利用,于2007年选用甘草、板蓝根两种道地药材,在陇中黄土高原半干旱区的坡耕地上进行了道地药材保护性耕作防治水土流失效应的研究。试验设传统耕作下板蓝根与甘草间作(TIL)、春小麦与甘草间作(TWL)、免耕不覆盖下板蓝根与甘草间作(NTIL)、春小麦与甘草间作(NTWL)、免耕秸秆覆盖下板蓝根与甘草间作(NTSIL)、春小麦与甘草间作(NTSWL)6个处理,坡度在6°~7°之间,每个处理小区底部设径流收集池。结果表明:(1)保护性耕作具有良好的防止土壤侵蚀效应 ...
张晓艳, 王立, 黄高宝, 陈光荣
doaj
Wildlife Letters, Volume 2, Issue 4, Page 169-178, December 2024.Canada Warblers are declining sharply across their range throughout several genetically distinct population units, but habitat preferences are unknown for the population segment occurring in Pennsylvania, United States. We addressed this knowledge gap by leveraging machine learning methods and a large existing acoustic data set to uncover several ...
Chapin Czarnecki +4 more
wiley +1 more source
Effects of Loading Angle and Linear Notch on Tensile Properties of Lithium-Ion Battery Separator [PDF]
, 2020 Lithium-ion battery separators act as the physical barriers to prevent contact between the positive and negative electrodes, and their structural integrity is critical to battery safety.
Fan, W, Wang, B, Wang, G, Xue, P
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Community perceptions of invasive species and environmental management in a US island territory
Conservation Biology, Volume 38, Issue 6, December 2024.Abstract Environmental managers struggle with communicating accurate and relevant information and with gaining trust from the communities they serve, problems that are especially pronounced in minority and colonized communities. An important step in developing successful management strategies is partnering directly with the communities involved, but ...
Ann Marie Gawel +2 more
wiley +1 more source
The Analysis of the Characteristics of High Power LED under High-stresses [PDF]
, 2012 半导体照明是目前国家重点扶持的新兴技术，大功率LED是半导体照明的关键器件。目前LED实际寿命和理论寿命(10万小时)仍有不小差距，这是由于器件材料、结构、工艺、封装等环节的缺陷，因此在研究LED新的工艺以及结构的同时，需要对其老化机理进行深入分析。本文主要针对功率型LED在脉冲和大应力条件下的光、电、热特性展开研究，以探索影响其可靠性的因素及老化机理。具体包括以下内容： 1.简单介绍了LED发展历史和现状，并且针对器件可靠性进行了综述分析，结合当前的研究，对LED的失效机理分别作了总结。 2.从光学 ...
薛浩
core
, 2001 利用动态Hopkinson装置和Instron 4026测试了15%SiC_P/Al-5Cu、15%SiC_P/2124、15%SiC_P/Al-Li、15%SiC_W/6061和30%SiC_P/6061铝合金等几种复合材料的准静态和冲击力学性能，探讨了应变率对于强度、硬化模量和失效应变等的影响。同时观察了上述材料动态拉伸断口，揭示了金属基复合材料破坏的几种不同控制机理。最后讨论了实验中发现的上述复合材料挤压不对称性的新特征，其中考虑了金属基复合材料的热失配应力和不同的损伤 ...
Li RKY(李国耀) +3 more
core
Shuitu Baochi Xuebao, 2016 采用田间试验，研究了不施肥（CK）、常规施肥（CF）、90%常规施肥（90%CF）、80%常规施肥（80%CF）、控释复合肥（CRF）和有机—无机肥配施（MF）6种施肥处理对稻田径流和渗漏损失的影响。结果表明：水稻田面水总氮（TN）和铵态氮（NH4+—N）浓度在施肥后第2 d达到峰值，之后快速下降，第7 d后降至峰值的15%以下并趋于稳定，控制稻田氮素流失最关键的时间为施肥后1周。减量施肥可以有效降低田面水和渗漏水的氮素浓度。不同施肥处理（CK除外）TN径流损失量和氮素流失率分别为8.81～15.78 ...
李 +4 more
doaj
, 2004 通过对铁电陶瓷疲劳失效研究现状的文献综述,概述了国内外在电疲劳和电致疲劳的机理、影响因素和实验手段等方面的研究进展。通过分别对各类电疲劳机理和各种电致疲劳模型进行讨论,比较了各种理论和模型之间的不同之处 ...
张颖, 程璇, 陈志武
core
, 2003 铁电薄膜在交变电场下发生电疲劳现象是影响其商业应用的主要障碍,也是目前国内外研究的热点。本文从铁电薄膜电疲劳的影响因素 ...
张颖, 程璇, 陈志武
core +3 more sources