Results 31 to 40 of about 1,575,255 (163)
Dianci bileiqi, 2016 高压电瓷是电力网络中的重要器件,通过对高压电瓷产品按一定批量进行定期更换,能降低输电变电网的损耗,达到节能目的。构建了影响造价成本的参量模型和约束函数,采用非线性预测算法进行造价成本和电力网络产能预测,完成了采用非合作博弈纳什均衡方法实现对电网改造成本和电网均衡配比模型构建。仿真结果表明,用该模型进行电网改造,能有效节省造价成本的同时,提高了电力网络产能。
马涛
doaj
World Food Policy, Volume 12, Issue 2, November 2026.ABSTRACT Agricultural development initiatives in sub‐Saharan Africa have emphasized improved crop varieties as a pathway to food security, resilience, and rural poverty reduction. However, empirical evidence often focuses narrowly on plot‐level outcomes and overlooks whole‐farm effects and the substantial heterogeneity in farmers' management practices,
Kodjo Kondo +4 more
wiley +1 more source
Shuitu Baochi Xuebao, 2008 通过田间试验研究了返青期不同程度根修剪处理对冬小麦群体结构、土壤水分及产量形成的影响.结果表明,不同程度根修剪处理均减少了小麦的群体数量,改善了群体结构,从而使得根修剪处理花期时的透光率显著大于对照.根修剪处理还使小麦对土壤水分的消耗显著减少,花期时根修剪处理小区的土壤含水量均显著高于对照.土壤水分的改善促进了小麦的生理活性,使根修剪处理小麦的花期光合速率均显著大于对照.成熟期时小剪根处理对籽粒产量没有显著影响,但由于显著减少了水分消耗,因此,提高了小麦的水分利用效率 ...
马守臣 +4 more
doaj
, 2011 改革开放的30年给我们带来了经济的快速增长,但形成的产业结构也造成了资源的大量消耗和环境的严重污染。我国经济能否继续保持快速、协调的增长,很大程度上将取决于产业结构的优化能否顺利推进。本文基于我国产业结构的现状,分析了我国产业结构中存在的问题,提出了利用外资、大力发展服务业等方法以促进我国产业结构的优化 ...
郑义
core
Resource Substitution: Local Governments' Issue Attention and Policy Reinvention
Policy Studies Journal, Volume 54, Issue 4, November 2026.ABSTRACT Research on policy reinvention, where a government modifies rather than replicates policy innovations introduced by other governments, has progressed significantly, but how it is influenced by the government's issue attention has not been thoroughly examined.
Yingxin Zhang, Yixue Yao, Kaifeng Yang
wiley +1 more source
Shuitu Baochi Xuebao, 2019 为比较研究不同土壤耕作方式（翻耕、旋耕、免耕）对南方双季稻区水稻产量构成与稻穗镉积累分配特性的影响，探讨镉污染稻田双季稻最优土壤耕作方式，2015—2017年，以"陵两优211"与"威优46"为早、晚稻供试品种，在湖南省湘潭县易俗河镇中度镉污染稻田（全镉含量0.86 mg/kg）开展定位试验，比较研究了双季免耕、双季翻耕、双季旋耕、早旋晚免、早翻晚免5种土壤耕作方式下土壤有效镉含量、双季稻的产量构成与穗镉积累分配情况。结果表明：（1）双季稻产量以双季翻耕处理最高，早翻晚免处理次之 ...
帅泽宇 +5 more
doaj
Engineering Photothermal Nanoplatforms for Multimodal Theranostics and Biosensing
Rare Metals, Volume 45, Issue 10, October 2026.ABSTRACT Photothermal platforms bridge materials science and biomedicine, emerging as a transformative frontier in biomedical applications. They offer spatiotemporally precise, noninvasive modalities with cell‐type‐independent efficacy for treating a range of diseases.
Xiao Han +3 more
wiley +1 more source
Gaoya dianqi, 2013 提出并实现了一种可与隔离断路器集成为一体的电子式电流互感器新型结构,介绍了产品的原理、结构及性能测试试验情况。产品利用空心线圈传感保护电流信号、低功率CT传感测量电流信号、远端模块就地采集空心线圈及低功率CT的输出信号、悬式光纤绝缘子保证绝缘并传输信号,具有绝缘结构简单可靠、体积小、质量小、测量准确度高、动态范围大、暂态特性好等特点。性能测试试验表明产品的测量准确度、温度特性及抗电磁干扰特性等关键性能满足入网运行要求。产品与隔离断路器集成为一体,能有效减小变电站的占地面积 ...
罗苏南 +5 more
doaj
Shuitu Baochi Xuebao, 2020 为明确减氮测控定量施肥技术结合地膜覆盖措施对黄土旱塬冬小麦产量构成及水肥利用效率的影响，为旱地冬小麦减施氮肥及提高产量提供理论依据，于2013—2018年在晋南黄土旱塬冬小麦种植区，设置农户施肥种植模式、减氮测控施肥、减氮测控施肥+垄膜沟播和减氮测控施肥+平膜穴播4种处理，分析了在减氮覆膜条件下连续5年冬小麦产量构成情况、土壤水分和氮、磷、钾肥利用效率。结果表明：（1）减氮测控施肥较农户模式在减少氮肥施用量46.9%，平衡施用磷钾肥的情况下，冬小麦年均籽粒产量、生物产量和公顷穗数分别增加4.4%，4.0%
刘凯 +9 more
doaj
Ultrasonic Vibration Assisted Laser Processing: A Hybrid Paradigm for Extreme Surface Enhancement
Rare Metals, Volume 45, Issue 10, October 2026.ABSTRACT Traditional laser processing techniques offer many advantages, but they often encounter limitations such as heat‐affected zones, recast layers, residual tensile stresses, and poor surface finish. The integration of ultrasonic vibration (UV) presents a promising hybrid approach to overcome these challenges by introducing beneficial effects like
Aziz Ul Hassan Mohsan +6 more
wiley +1 more source