Results 41 to 50 of about 38,844 (178)
The Effect of Residual Stress on Bending Strength of Induction Hardened Gears
Jixie chuandong, 1996 残余应力是影响感应淬火齿轮弯曲疲劳强度的重要而且复杂的因素之一，因为残余应力本身也受多种因素的影响。本文利用Ｘ射线衍射方法研究了各种感应淬火工艺及齿根拐角半径的影响，进而运用四点弯曲平板试样及标准试验齿轮研究了残余应力对其弯曲疲劳强度的影响。
陈国民, 阎满刚, 牛万斌
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Conservation Biology, Volume 40, Issue 2, April 2026.Abstract Illegal wildlife trade (IWT) is one of the largest global illegal activities, and it negatively affects biodiversity and sustainable development worldwide. DNA barcoding coupled with high‐throughput sequencing (i.e., metabarcoding) is useful in identifying taxa affected by IWT and has been used routinely for decades.
Maria Joana Ferreira da Silva +9 more
wiley +1 more source
Shuitu Baochi Xuebao, 2007 通过环境因子（温度、pH、扰动、溶解氧等）及沉水植物对底泥磷释放影响的研究，分析了环境因子影响底泥磷释放的因素，及不同环境条件下沉水植物影响底泥磷释放的因素，得出了如下结论：溶解氧、pH、温度及扰动等对底泥磷向上覆水体释放都有一定影响，其中溶解氧和pH值影响较大；湖泊特别浅水型湖泊中，磷对水体富营养化起重要作用；沉水植物在控制湖泊底泥营养向水体扩散、风等外界因素扰动底泥起关键作用；浅水型湖泊中，湖泊底泥受扰动较大适合种植象狐尾藻类多分枝的沉水植物，这样有利于抑制底泥磷向水体的释放．
蔡景波 +5 more
doaj +2 more sources
Success of restoration strategies in preventing extirpation of 2 critically endangered coral species
Conservation Biology, Volume 40, Issue 2, April 2026.Abstract An unprecedented marine heatwave in 2023 caused widespread coral bleaching and mortality throughout the Caribbean. In the Florida Keys (USA), 2 foundation species, elkhorn coral (Acropora palmata) and staghorn coral (Acropora cervicornis), were severely affected.
Erinn M. Muller +29 more
wiley +1 more source
Gaoya dianqi, 2012 按GB 18802.1—2002之规定进行8/20μs冲击电流下的电涌保护器（SPD）残压测试时,测试结果常受到各种因素的影响。笔者通过试验验证,理论探讨,分析了SPD两端引线、高压探头与被测SPD之间的连线方式、残压信号传输线缆等多种因素对残压测量结果的影响。确定了电涌保护器残压测量过程中的各种影响因素及影响趋势,提出准确测量残压的方法。
高鑫 +4 more
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Hobbyist preferences for pet freshwater turtles
Conservation Biology, Volume 40, Issue 2, April 2026.Abstract The burgeoning pet trade is a primary threat to wild freshwater turtles worldwide. Although the risks from commercial exploitation of turtles have been discussed widely, there is little empirical research on preferences for pet turtles from a hobbyists’ perspective.
Jingjing Zhao +7 more
wiley +1 more source
Zhongshan Daxue xuebao. Yixue kexue ban, 2008 [目的] 了解海南省医学大学生睡眠质量的影响因素。[方法] 采用匹兹堡睡眠质量指数自评量表（PSQI）、症状自评量表（SCL-90）、艾森克人格问卷(EPQ)及自制的睡眠质量影响因素调查表，对海南医学院551名大一到大五的本科生进行调查。[结果] ①匹兹堡睡眠质量总平均得分为5.74（s=2.78）分，21.42%的学生睡眠质量有问题。男女差别无统计学意义。②通径分析结果显示学习负担和应激事件是睡眠质量差的诱发因素，但不起主要作用，人格因素、年级直接和间接作用于中间变量对睡眠质量产生影响作用 ...
王小丹, 高允锁, 郭敏
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Gaoya dianqi, 2020 研究直流接地极周边交流系统变压器偏磁直流分布特征及其影响因素能够为治理变压器直流偏磁提供理论依据。首先,基于变电站偏磁直流分布模型,分析了各影响因素的作用机理;其次,利用主成分分析法对影响因素进行处理,在此基础上,提出基于神经网络的变电站偏磁直流估测模型;最后,利用某电网变电站监测直流数据对上述分析方法进行验证,分析了偏磁电流对影响因素的敏感性,结果表明,所建模型的有效性,能够为规划阶段避免或降低中性点偏磁直流提供有用参考。
丁国成 +5 more
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Conservation Biology, Volume 40, Issue 2, April 2026.Abstract Consumer demand for ivory perpetuates the unsustainable and illegal killing of African elephants and other wildlife species. Interventions that aim to change consumer behavior are increasingly recognized as a crucial element of demand management. However, poor design and implementation have limited their effectiveness.
Molly R. C. Brown +2 more
wiley +1 more source
Zhongshan Daxue xuebao. Yixue kexue ban, 2004 【目的】对可能影响严重急性呼吸综合征(SARS)临床病程的多种因素进行Logistic回归分析,初步评价何种因素对SARS病程有影响。【方法】入选的SARS病例共85例(医务人员占92.9%),男15例,女70例,平均年龄(28.9±9.8)岁。以反映临床病程的指标作为因变量,包括持续发热时间,肺部病变初始出现至发展到最高峰的时间,肺部病变吸收时间。以可能影响临床病程的指标作为协变量,包括年龄、性别、潜伏期、初始体温、最高体温、持续发热≥39℃时间、病程中最大受累肺野数目、外周血白细胞减少、抗生素 ...
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