Results 31 to 40 of about 850,699 (146)
, 1980 本文阐述了微分方程公式推导程序系统的算法,这个系统已经实现,并成功地用于极限环的研究工作.作为一个具体例子和验证,文中给出了右方为二次多项式方程的机器结果,并指出了Н.Н.Баутин所发表结果中的符号错误 ...
秦朝斌, 刘尊全
core +2 more sources
Dianci bileiqi, 2018 通过分析高压电气设施结构法兰与瓷套管连接节点的构造特征,建立了基于瓷柱、法兰弯曲变形和胶装材料挤压变形描述的节点弯曲承载力学模型,然后通过理论推导提出了一个瓷套管与法兰连接等效弯曲刚度的解析公式;最后通过一个500 k V避雷器试验数据对本文提出的公式进行了验证。结果表明:应用本文公式得到结果与试验结果吻合;与我国现行电力设施抗震设计规范公式对比,新建公式计算结果误差为1.91%。本文公式由力学模型直接推导建立,不包含经验系数,能够揭示法兰与瓷套管连接部位的承弯机制,可用于电气设施结构的抗震计算。
高政国, 朱全军, 杨钦, 曹枚根
doaj
Latin American Policy, Volume 17, Issue 1, March 2026.ABSTRACT The rise of ride‐hailing platforms has profoundly transformed urban mobility in Latin America over the past decade. Transportation Network Companies such as Uber, DiDi, Cabify, InDrive, and others operating in the region have affected transportation patterns and intensified debates around labor relations, algorithmic management, regulatory ...
Ronald Sáenz‐Leandro
wiley +1 more source
Conservation Biology, Volume 40, Issue 1, February 2026.Abstract In the era of the sixth mass extinction, reversing global biodiversity loss is of vital importance for life on Earth. In 2022, parties to the Convention on Biological Diversity (CBD) adopted the Kunming‐Montreal Global Biodiversity Framework (GBF), a strategic plan with 23 action‐oriented targets to be achieved by 2030.
Ina Lehmann +3 more
wiley +1 more source
Police Cloud: Functional modularity in China's cloud public security infrastructure
Regulation &Governance, Volume 20, Issue 1, Page 90-104, January 2026.Abstract Globally, China's Ministry of Public Security has one of the largest appetites and regulatory scopes for new technology use in policing. Using the case study of Police Cloud—a cloud infrastructure project, this paper examines a national wave of cloud migration initiated in Shandong in 2013.
Ausma Bernot
wiley +1 more source
New Directions for Child and Adolescent Development, Volume 2026, Issue 1, 2026.Background Working memory updating is crucial in bilingual children′s second language (L2) reading comprehension. A robust updating ability is a cognitive key for children to successfully master L2 reading comprehension. Objective This study is aimed at investigating the effect of updating ability on the L2 Chinese reading comprehension among Uyghur ...
Guangxin Li +3 more
wiley +1 more source
Jixie chuandong, 1992 本文由闪温准则导出了材料焊合系数的计算公式,经FZG齿轮胶合试验证明该公式的计算误差不大,能够满足工程应用的需要,并据此计算了25Cr2MoVA钢四种典型渗氮工艺的材料焊合系数。
赵少甫, 陈秀玉
doaj
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
Local Public Goods Provision in the Post-Agricultural Tax Era in Rural China [PDF]
This paper investigates regional differences in local public goods provision in rural area in the 2000s, using large village sample surveys (CHIP 2002 and 2007 surveys, a survey in Ningxia).
Hiroshi Sato, Sai Ding
core