Results 41 to 50 of about 11,925 (169)
Coupling numerical simulation of flow field,temperature field and stress field in a wide-thick slab continuous casting mold [PDF]
, 2016 Based on a moving boundary approach, a three-dimensional dynamic model is built for 2400 mm ~400 mm wide-thick slab molds by using ProCAST to realize the coupling simulation of flow field, temperature field and stress field.
CHEN Ping-hu +3 more
core +1 more source
Wildlife Letters, EarlyView.This review summarizes the status of musk deer in China, highlighting severe population declines due to illegal hunting and habitat loss, and proposes integrated conservation strategies including habitat protection, captive breeding, and law enforcement to support the recovery and sustainable management of this ecologically and economically important ...
Feng Jiang +8 more
wiley +1 more source
Jixie chuandong, 1991 齿轮传动设计中,关于齿轮的接触强度,传统的表层应力计算是建立在赫兹干接触分析基础上的,这与齿轮传动的实际工况颇有差别。本文考虑了动态——瞬态弹流润滑对直齿轮表层应力的影响,经数值计算发现,与干接触情况相比,最大表层当量应力更接近表面,并向出口区偏移,且由于轮齿接触区的压力分布和剪应力分布存在二次峰,表层当量等值应力分布有明显的变化。
张和豪, 华东耘, 詹胜龙
doaj
, 2016 中国地质调查局立项开展的渤海海峡跨海通道地壳稳定性的调查评价是重大涉海工程前期的基础性工作,该项目在收集已有成果资料的基础上,对渤海海峡区域进行了系统的地球物理勘测与研究,分析了灾害地质类型, 甄别出了主要的活动断裂,开展了渤海海峡及邻区的外围地震活动性和地壳层析成像研究,并进行了地应力、微震实地长期监测 ...
赵铁虎, 赵铁虎 齐君
core
Functional Ecology, EarlyView.Read the free Plain Language Summary for this article on the Journal blog. Abstract Decomposition is the transformation of dead organic matter into its inorganic constituents. In most biomes, decomposition rates can be accurately predicted with simple mathematical models, but these models have long under‐predicted decomposition in globally extensive ...
Heather L. Throop +8 more
wiley +1 more source
Crystalline qualities and optical properties of InGaN/GaN quantum well improved by in situ SiNx pretreatment of GaN template [PDF]
, 2016 由于存在比较大的晶格失配和热失配，以蓝宝石为衬底的GaN外延层位错密度高，晶体质量差，阻碍了GaN基器件性能的进一步提高。降低GaN外延层中的位错密度，提高GaN材料的晶体质量是提高相关器件性能的基础，也是科研人员面临的机遇和挑战。 表面/界面改性技术可有效调控GaN和InGaN材料的生长行为及特性，通过对GaN基材料的不同生长阶段（不同位置）进行SiNx处理，调控GaN的生长模式与应力分布，可大幅降低GaN薄膜的位错密度，明显改善其表面形貌，增强发光性能 ...
黄德猛
core
Thermal deformation analysis of copper-steel composite staves [PDF]
, 2016 The improvement in thermal deformation resistance of the copper stave in the bosh area and lower stack area of a blast furnace is the key factor for prolonging the blast furnace campaign life.
CHENG Shu-sen +4 more
core +1 more source
Effects of parachute science on local research capacity 降落伞科学对当地研究能力的影响
Conservation Biology, EarlyView.Abstract Strengthening research capacity is essential to address the global biodiversity crisis. Yet, parachute science often undermines this goal, and its prevalence, costs, and benefits are unclear. We analyzed 13,502 publications on primate research that we extracted from Scopus (1960–2022) to evaluate the effects of parachute science on local ...
Li Yang +11 more
wiley +1 more source
Zhongguo shiyan zhenduanxue, 2015 目的分析两种套筒冠义齿修复牙周病伴游离端缺失基牙应力分布,为牙周病牙列缺损修复方法选择提供理论依据。方法应用三维有限元方法比较分析支持型套筒冠义齿与沟槽套筒冠义齿修复牙周病伴游离端缺失基牙应力峰值及应力分布情况。结果沟槽套筒冠义齿基牙最大应力为3.05 Mpa,支持型套筒冠义齿应力峰值为3.33 Mpa,两种义齿均在远下斜向加载牙槽骨吸收达2/3时应力最大,在垂直加载牙槽骨正常时应力最小。支持型套筒冠基牙应力集中较沟槽套筒冠更偏向于牙颈部。结论沟槽套筒冠义齿基牙应力小于常规支持型套筒冠义齿 ...
王伟, 张艳, 袁琳
doaj
Comprehensive framework for assessing and optimizing existing research networks
Conservation Biology, EarlyView.Abstract Conservation, monitoring, and research networks, or collections of ecological research sites unified under a common mission of data collection or a research mission, are essential infrastructure for understanding large landscapes. However, most networks developed opportunistically over decades rather than through systematic design, creating ...
Alyson East +2 more
wiley +1 more source