Results 31 to 40 of about 14,739 (111)
Bipartisan Failures: How Political Agendas Undermine Core Ethical Principles in Emergency Management
Politics &Policy, Volume 53, Issue 6, December 2025.ABSTRACT This paper examines how political agendas across the ideological spectrum compromise ethical principles in emergency management in the United States. Through a literature review and comparative fact‐based scenario analysis, it demonstrates that both conservative and liberal governments have politicized disaster declarations, resource ...
Erik Xavier Wood
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Gaoya dianqi, 2015 提出了一种由直流后备式熔断器和直流真空负荷开关串联组成的直流组合电器,对其直流开断特性进行了仿真和实验研究。新型直流组合电器可完成直流电流的全范围开断:当开断额定电流和过载电流时,采用真空直流负荷开关利用人工电流过零法开断电流,此时后备式熔断器不动作;当开断大过载电流和短路电流时,采用后备式直流熔断器直接开断大电流,也可以将大电流限制至较低幅值再采用真空直流负荷开关进行分断。实验结果证明,该直流真空负荷开关可以在5 ms内成功开断200 A至1.7 k A的直流电流,直流后备式熔断器可以开断1.7 k ...
刘思远 +7 more
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On the Remodeled Cathode-Ray Oscilloscope by an old Television Tube [PDF]
, 1966 We have made the experimental oscilloscope, that is remodeled the circits of an old television. And then, we have come to the conclusion that the apparatus is useful for the observations of the wave forms of the low frequency.テレビ用ブラウン管を用いたXYレコーダーは ...
中川 孝之, 高瀬 博文
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Ultrasound in Obstetrics &Gynecology, Volume 66, Issue 5, Page 621-630, November 2025.ABSTRACT Objectives To compare the maternal hemodynamics of Chinese women at low and at high risk for preterm pre‐eclampsia (PE) and assess the differences in hemodynamic parameters between high‐risk women with or without prophylactic aspirin. Methods This was a prospective longitudinal case–control study of 857 Chinese women with a singleton pregnancy
X. Wang +11 more
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Gaoya dianqi, 2012 直流滤波器是特高压直流输电工程直流场重要成套设备之一,笔者在总结前期特高压直流输电工程系统研究结论的基础上,研究分析了+800 kV特高压直流输电工程直流滤波器设计需要考虑的关键问题,包括滤波器形式,直流侧谐振,要考虑的典型故障;介绍了用于计算直流滤波器典型故障的模型和方法。以云广+800 kV特高压直流输电工程为例,对直流侧谐振进行了校核,对直流滤波器设备暂态定值进行了计算。研究结果表明,云广±800 kV特高压直流输电工程直流滤波器设计是合理的,可满足直流系统安全可靠运行要求。
田邑安, 张万荣, 行鹏, 胡宇
doaj
Gaoya dianqi, 2022 换流站直流转换开关及直流旁路开关的操作机构大多由交流断路器改造而来，其防跳回路按照固定开关于分闸状态的原则设计，并不能完全适应直流系统的运行要求。文章概述了直流转换开关及直流旁路开关的结构及原理，从直流系统运行要求、最大转换电流及转换失败要求两个方面，分析了直流转换开关及直流旁路开关的设备运行要求。基于配合保障直流系统可靠性和可用率的要求分析了常规直流转换开关及旁路开关防跳回路设计存在的不足，指出直流转换开关和旁路开关的防跳设计应遵从固定于合闸状态的原则，并给出了防跳回路的改进设计。
余爽 +6 more
doaj
, 1949 直流に交流を併用して電解を行った場合に，直流のみによる電解と異った現象の認められる事は，従来屡々報告されている。過電圧に対する脹勤電流の影響としては，一般に，過電圧を減少するものと考えられている。即ち，Marsh等に依れば，交流の併用により一般に陰極電圧は小になる傾向を有すると云う。叉，神山は鉄の電解に交流を併用すれば，電解鉄の脆性が改善せられる事を報告し，その原因の一つとして，水素過電圧の降下を考えている。叉，村上等は，クロム鍍金に交流を併用した場合の陰極能率の低下の原因を ...
位崎 敏男
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Beyond Motivation: Modeling the Predictive Role of L2 Pride in Informal Digital Learning of English
International Journal of Applied Linguistics, Volume 35, Issue 4, Page 1938-1952, November 2025.ABSTRACT This study investigates the role of second language (L2) pride—an understudied affective factor—in shaping learners’ language learning motivation and involvement with informal digital learning of English (IDLE). Drawing on questionnaire data from 1388 Chinese university EFL students, the study employs structural equation modeling to examine ...
Minlin Minny Zou +3 more
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Studies on the Anodic Oxidation of Aluminum (I) : Anodic Oxidation of Aluminum in Aqueous Solutions Containing Sulfuric Acid and Some Organic Acids [PDF]
, 1965 Anodic oxidation of aluminum in aqueous solutions containing sulfuric acid and one of various organic acids was examined. The organic acids used were sulfosalicylic acid, salicylic acid, benzoic acid and benzenesulfonic acid.
新美 洪一 +2 more
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International Journal of Applied Linguistics, Volume 35, Issue 4, Page 1927-1937, November 2025.ABSTRACT “Neijuan” (translated as involution) has sparked increased interest in the development of foreign language teacher identity. However, research exploring neijuan's potential role in fostering identity development during early career stages has been insufficient.
Yanhua He +2 more
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