Results 41 to 50 of about 15,396 (127)
Gaoya dianqi, 2016 针对微网系统在离网模式下,给不平衡负荷供电之一问题,文中采用三相四桥臂作为双模式变流器拓扑,并设计了并网与离网双模式工作及并离网模式切换的控制策略,可解决离网模式下不平衡负载引起的电压不平衡问题。根据不同模式下三相四桥臂变流器的数学模型,采用电网电压定向的电感电流闭环控制策略实现并网模式运行,采用双同步旋转坐标系下的正负序电压控制以及零序电压的比例谐振控制策略实现离网模式运行。同时,采用一种控制模式的平滑切换方法来实现并网与离网两种模式的独立运行。最后,通过仿真对采用的双模式变流器控制策略进行了验证 ...
陶艳
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World Medical &Health Policy, Volume 17, Issue 4, Page 831-853, December 2025.ABSTRACT This article aims to sort out the meaning of the term “health nationalism,” operationalize this term and analyze this phenomenon in opposition to the cosmopolitan health policy model. Here, health nationalism is treated as a serious obstacle to access to healthcare and a cultural‐ideological barrier to equity in global public health. Two ideal
Piotr Żuk, Paweł Żuk
wiley +1 more source
Guangtongxin yanjiu, 2003 文章主要讨论了自动交换光网络（ASON）控制平面的两种不同结构:控制平面在网元外部的结构和控制平面部分集成在网元内部的结构,并对这两种结构进行了比较.
李文耀, 李志刚
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Latin American Policy, Volume 16, Issue 4, December 2025.ABSTRACT In recent years, video assistant referee systems have been increasingly used to correct unfair decisions in sports. Similarly, I argue that constitutional referendums play a corrective role in hybrid or competitive authoritarian regimes, where the electoral referee is biased and the government enjoys unfair advantages.
Muhammet Derviş Mete
wiley +1 more source
The Political Empowerment of Women and Industrialization in Africa
Politics &Policy, Volume 53, Issue 6, December 2025.ABSTRACT This study examines the effect of political empowerment of women on industrialization in Africa. The results, after controlling for cross‐sectional dependence, show that women's political implication causes industrialization. The fixed effects Driscoll/Kraay standard error and the GMM estimators reveal that women's political empowerment ...
Tii N. Nchofoung +2 more
wiley +1 more source
智能科学与技术学报, 2019 针对智能机器控制的复杂性问题，提出了平行机器的概念、框架和方法。平行机器是将基于 ACP 的方法扩展到智能机器领域的产物，形成虚实平行互动的管控模式，是一种针对复杂环境、复杂问题的管理与控制方法。平行机器包括实际的物理机器和软件定义的虚拟机器，通过二者间的虚实互动实现描述、预测和引导3个功能，最后介绍平行机器相关技术并对平行机器的潜在应用进行展望。
白天翔, 沈震, 刘雅婷, 董西松
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Improvements for better scaling of locally managed marine areas
Conservation Biology, Volume 39, Issue 5, October 2025.Abstract To protect and restore ecosystems at the speed and scale required to meet current environmental challenges, a greater understanding of how conservation initiatives spread from existing to new adopters is required. According to the diffusion of innovation theory, positive adopter‐to‐peer communication is a powerful driver of innovation spread ...
Emily Lewis‐Brown +6 more
wiley +1 more source
Guangtongxin yanjiu, 2014 通过对激光外调制不同方式的对比分析,重点研究了AOM（声光调制）器件的原理及控制方法,提出了三种可控调制方法,且在控制方面分别进行了对比验证。采用其中的TTL电平（典型值高电平3.5V,低电平0.2V）调控方法,将数字信号经FPGA（现场可编程门阵列）以2FSK（二进制移频键控）方式进行调制编码,调制信号通过AOM加载于激光上,激光通过自由空间传输,借助串口实现了通信速率为115.2kbit/s的数字通信,且该激光外调制通信系统高频载波达到了0.7MHz左右。
徐山河, 肖沙里, 王珊, 易星
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Influences on cannabis policy design and adaptation in the American states
Policy Studies Journal, Volume 53, Issue 3, Page 723-746, August 2025.Abstract Despite federal prohibitions, three‐quarters of states had implemented medical marijuana laws (MML) and one‐third had implemented recreational cannabis laws (RCL) by 2020. State policy designs varied considerably, and we focus on policy development and maturation in policy implementation, examining factors influencing design features of policy
Grant W. Neeley +1 more
wiley +1 more source
Shiyou jixie, 2012 为进一步提高煤层气钻机的自动化水平，尽量减少司钻的操作，提高设备自检能力，研制了MC90Y煤层气车载专用钻机。该钻机采用电液控制方式，PLC控制器集中控制，起升和旋转系统使用比例容积泵调速，辅助系统采用恒压变量泵提供动力；起升系统采用平衡阀回路设计，实现了正载荷、负载荷和变载荷情况下的平稳运行；采用手柄方位辨识控制，降低司钻的操作复杂性，优化起升和旋转系统的运行；控制系统具有自检、监测和自锁保护等功能，提高了钻机的安全保护能力。测试及现场应用结果表明，该钻机操作便捷，可控性好，运行平稳。
纪友哲, 闵庆利, 王金宏
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