Results 21 to 30 of about 13,315 (169)
Stress distribution law and adherent dross stability of the copper cooling stave with variable slag coating thickness [PDF]
, 2017 A thermal-mechanical coupling model of a copper cooling stave with variable slag coating was founded based on thermal elastic mechanics, and the influence of the gas temperature, the cooling system, the materials of insert bricks, and the properties of ...
LI Feng-guang, ZHANG Jian-liang
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Conservation Biology, EarlyView.Abstract Achieving global conservation policy goals requires the ability to set and measure progress toward science‐based targets for biodiversity. The species threat abatement and restoration (STAR) metric was developed to enable actors to set science‐based targets for species.
Louise Mair +17 more
wiley +1 more source
Zhongshan Daxue xuebao. Yixue kexue ban, 2000 【目的】了解磁性固位的下颌种植覆盖义齿的应力状况及其分布规律, 为磁性固位体的临床应用提供生物力学 依据。【方法】采用二维光弹应力分析法, 分析圆柱形种植体在垂直向和侧向加载条件下种植体— 骨界面的应力状况。【结 果】种植体应力主要为均匀分布的压应力, 最大应力位于种植体根尖部, 颈部应力相对较小, 未见明显弯曲应力。【结论】磁 性固位种植义齿的种植体应力分布符合生物力学要求, 有利于种植体的长期成功。
魏素华 +3 more
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, 2018 为解决传统半导体压力传感器温度特性差、非线性度高等问题,设计一种基于双岛结构的多晶硅纳米薄膜压力传感器。利用有限元分析软件分析硅膜结构的应力分布规律,确定力敏电阻的最佳布局,进一步提高了传感器的灵敏度。这种压力传感器兼具温度特性好、灵敏度高、线性度好等综合性能。福建省科技厅引导性(重点)项目(2017H032);;莆田学院激光精密加工工程技术研究中心开放基金项目 ...
林振衡 +3 more
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Biodiversity‐driven spatial conservation planning to delineate temporally stable regions
Conservation Biology, EarlyView.Abstract The accelerating loss of biodiversity underscores the critical need for effective conservation strategies, particularly in the face of climate change and anthropogenic pressures. We devised a conservation planning framework that adopts a temporal stacking approach to species distribution models and landscape connectivity analyses. These models
Mattia Iannella +5 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
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Mechanical response analysis of surrounding rock bearing structure of soft rock roadway based on full-length anchorage [PDF]
, 2023 A mechanical model of full-length anchoring bolt is established to study the stability of mechanical bearing structure of surrounding rock in high stress soft rock roadway after full-length anchoring bolt.
Guangming ZHAO +5 more
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Drivers of bat researchers’ intent to adopt field hygiene practices
Conservation Biology, EarlyView.Abstract Infectious disease is a growing threat to wildlife, with zoonotic transmission most likely at the human–wildlife interface. One underappreciated activity at this interface is fieldwork with wild animals, but associated risks can be mitigated through field hygiene (FH) practices, such as using personal protective equipment and other appropriate
Joanna L. Coleman +6 more
wiley +1 more source
Dianci bileiqi, 1980 本文研究了具有内部微观结构缺陷的瓷件在单轴向应力状态下强度的维布尔分布,给出δu=0情况下决定维布尔参数的一个图解方法。根据维布尔分布导出抗折瓷件在一定可靠性下极限应力下限值的计算公式,并比较了按维布尔分布和按正态分布计算的在相同可靠性下瓷件极限应力下限值的结果,结果表明按维布尔分布计算的下限位偏于安全。
马功勋, 刘长荣, 陶增炎
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Zhongshan Daxue xuebao. Yixue kexue ban, 2022 膝关节植入物常被用来替换膝关节受损组织，恢复膝关节的正常功能和关节内正常的应力分布。有限元分析（FEA）可利用有限的、相互连接的单元对膝关节植入物植入后的膝关节应力进行精准、快捷的计算，直观的展现植入物植入后的膝关节应力分布情况。本研究通过中国知网、Web of Science、PubMed等数据库调研FEA在膝关节植入物生物力学研究中应用的相关文献，以人工膝关节、人工半月板和前交叉韧带移植物为主体，阐述了通过FEA分析植入物在不同材料结构设置和植入条件下对术后膝关节应力分布的影响 ...
邵佳升, 宋剑
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