Results 61 to 70 of about 1,135,151 (172)
Research on Face Load Distribution for Narrow Helioal Gears
Jixie chuandong, 1994 本文用三维边界元程序计算了窄斜齿轮在不同接触线上的载荷分布，分析了齿轮齿面载荷的分布规律。同时还计算出齿轮副的平均刚度ｋｎ１和载荷分布系数Ｋβ计算结果表明荷载分布规律与轴向重合度εβ及传动比有关，载荷分布系数Ｋβ在１．０４至１．２３之间。
王宪法
doaj
Zhejiang Daxue xuebao. Lixue ban, 2007 讨论了OC型逻辑函数一阶布尔偏导数的规范OC展开式.在此基础上提出了计算OC型逻辑函数一阶、二阶布尔偏导数的表格方法.根据二阶布尔差分的定义以及二阶布尔差分与布尔偏导数的关系提出了两种计算OC型逻辑函数二阶布尔差分的表格方法，并作了比较.本文提出的计算OC型逻辑函数布尔偏导数与布尔差分的表格方法具有简捷、方便以及易于计算机编程操作等优点.
LIUGuan-sheng(刘观生) +2 more
doaj +1 more source
Rare Metals, Volume 45, Issue 10, October 2026.ABSTRACT Bimetallic structures fabricated by laser powder bed fusion (LPBF) provide an effective strategy for achieving multifunctional integration, yet interfacial structural continuity and the role of lattice defects remain insufficiently understood.
Jinguo Ge, Shuo Yin
wiley +1 more source
, 1998 圆柱拿身草分布新记录ＤｅｓｍｏｄｉｕｍｔｅｒｅｓＷａｌ．（Ｃａｔ．ｎｏ．５６９４，１８３１－３２，ｎｏｍ．ｎｕｄ．）ｅｘＢｅｎｔｈ．ｉｎＭｉｑ．，Ｐｌ．Ｊｕｎｇｈ．２２５．１８５２，ｉｎａｄｎｏｔａ；ＢａｋｅｒｉｎＨｏｏｋ．ｆ．，Ｆｌ．Ｂｒｉｔ，Ｉｎ..
高信芬
core
Dianci bileiqi, 1981 本文研究未上釉棒形抗折瓷件强度的理论分布,其分布遵循维布尔分布。各种不同因素的试验验证了理论分布的正确性。本文还对估计维布尔参数值的方法进行了讨论,且对大容量子样估计了均匀性系数m在一定置信水平下的置信区间。
马功勋, 刘长荣, 陶增炎
doaj
Scientists’ warning on the global destruction of rock outcrop ecosystems
Conservation Biology, Volume 40, Issue 5, October 2026.Abstract Rock outcrops are geological formations that harbor a highly specialized biota adapted to harsh environmental conditions that differ from their surrounding landscapes. They are globally distributed, especially in old, highly weathered landscapes, and can function as habitat islands containing high levels of endemism and distinct evolutionary ...
Luiza F. A. de Paula +19 more
wiley +1 more source
330 kV GIS隔离开关操作过程中电磁干扰单脉冲波形特征规律研究
Gaoya dianqi气体绝缘开关设备中隔离开关操作产生的特快速暂态过电压是威胁二次设备安全运行的重要因素。为掌握VFTO特征分布规律，文中按照实际线路参数搭建330 kV GIS隔离开关模拟干扰源试验系统，模拟现场GIS隔离开关分合操作时产生的电磁干扰过程，通过核密度估计法对提取的VFTO单脉冲波形特征数据进行了全面的统计分析。结果表明，合、分闸时单脉冲的最大峰值分布呈3峰分布，最大峰值分别分布在[25.98，294.49] kV、[33.08，305.91] kV；合、分闸时的单脉冲的持续时间分布分别呈2峰分布和3峰分布，
梅冰玉 +5 more
doaj
Conservation Biology, Volume 40, Issue 5, October 2026.Abstract Ecological niche models (ENMs) are used to assess the abiotic preferences of species by linking their occurrences to the environmental conditions in which they live. We developed a fossil‐informed ENM framework that integrates mid‐Holocene and modern occurrences to test niche stability and reconstruct abiotic niche characteristics for four ...
Claire. M. Williams +3 more
wiley +1 more source
Shuitu Baochi Xuebao, 1995 对中国降雨侵蚀力Ｒ值的计算与分布进行了系统研究。主要内容包括Ｒ指标的确定；次降雨Ｒ失真、Ｒ值以及多年平均Ｒ值的简易计算方法；我国不同地区年Ｒ值的月分布、次分布、频率分布和年际变化特征，以及Ｒ值的雨量、雨强分布特征；对我国１４０多个重点站的Ｒ值进行了计算；在分析我国降雨侵蚀力Ｒ值区域分布特征的基础上，编制了中国降雨侵蚀力等值线图，进行了降雨侵蚀力分区。
王万中 张宪奎
doaj
Modeling seed germination data to meet biodiversity conservation needs in the Mediterranean
Conservation Biology, Volume 40, Issue 5, October 2026.Workflow to assess the availability and quality of germination data and assign species' thermal risk in the Mediterranean. (a) Assessment of data availability, including the phylogenetic distribution of the number of records (i.e. available germination data); (b) data quality assessment; and (c) assignment of climate risk categories for species that ...
Diana María Cruz‐Tejada +2 more
wiley +1 more source