Results 21 to 30 of about 1,522,229 (164)

Resource Substitution: Local Governments' Issue Attention and Policy Reinvention

open access: yesPolicy 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

浅谈我国产业结构优化 [PDF]

open access: yes, 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  

SF6断路器液压机构零部件在生产现场的调试与检测

open access: yesGaoya dianqi, 2005
根据小批量装配生产现状,组成液压机构零部件综合检测装置,以满足装配生产现场调试检测零部件的需求。
于荣浩, 于荣涛
doaj  

Engineering Photothermal Nanoplatforms for Multimodal Theranostics and Biosensing

open access: yesRare 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

集成于隔离断路器的电子式电流互感器

open access: yesGaoya 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  

Ultrasonic Vibration Assisted Laser Processing: A Hybrid Paradigm for Extreme Surface Enhancement

open access: yesRare 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

股份制企业的产权结构和产权流动 [PDF]

open access: yes, 1995
国有企业一旦改造为股份制企业。企业的组织结构和运行机制将发生重大变化。由于产权结构受原来的资产存量产权的归属关系及其结构的影响,股份将主要由原有资产折股而成,而企业为了增资在市场上公开发行的股票或内部发行的股票占企业股份总额的比重并不很大,这就使得我国许多股份制企业的产权结构以国有股和法人股为主。国有企业资产是由国家无偿投入的,所有的企业产权都归属于唯一产权主体——国家。国有企业改造成股份制后,原有国有企业单一的产权主体将转变为多元产权主体,产权结构形成多元格局。从理论上讲 ...
何诚颖
core  

35千伏穿缆式变压器瓷套整体成型工艺简介 附视频

open access: yesDianci bileiqi, 1975
变压器用瓷套近几年来采用穿缆式的用户越来越多,这种型式的套管结构有便于密封、节省导体材料等技术经济价值。但由于穿缆式套管的中孔为异形结构,故给电瓷成型工艺造成较大的困难。许多兄弟厂对这类套管采用湿接成型工艺。这种工艺,存在着工序多,生产效率低,质量不稳定,操作技术要求较高等缺点。为了提高工效,稳定产品质量 ...
醴陵电瓷厂技术科
doaj  

Lignin‐Derived Carbon Quantum Dots as Hole‐Trapping Promoters in LCDs/Bi‐MOF/ZIS With S‐Scheme Heterojunction for Efficient Photocatalytic Hydrogen Peroxide Production in Pure Water

open access: yesRare Metals, Volume 45, Issue 10, October 2026.
ABSTRACT Photocatalytic hydrogen peroxide (H2O2) production from water and oxygen driven by solar energy represents a highly promising green and sustainable strategy. Herein, lignin‐derived carbon quantum dots (LCDs) were strategically introduced at the heterojunction between a Bi‐based metal organic framework (Bi‐MOF) and ZnIn2S4 (ZIS).
Wanpeng Sun   +8 more
wiley   +1 more source

土壤耕作方式对双季稻产量构成与穗镉积累的影响

open access: yesShuitu 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  

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