Results 101 to 110 of about 2,032 (144)
[Effect of various intracanal materials on the diagnostic accuracy of cone-beam computed tomography in vertical root fractures]. [PDF]
Beijing Da Xue Xue Bao Yi Xue Ban, 2023 Zhang JH, Pan J, Sun ZP, Wang X.
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双相不锈钢S32001角钢悬臂构件弯扭屈曲性能及设计方法研究
Jianzhu Gangjiegou Jinzhan双相不锈钢S32001兼具优异强度与经济性，但目前针对其制成结构钢构件的相关研究较为匮乏。文中选取双相不锈钢S32001冷弯角钢悬臂构件的弯扭屈曲性能为研究对象。首先，依托轨道交通区间冷弯角钢设备支架，开展了冷弯角钢悬臂梁弯曲试验研究，试验关键参数包括截面尺寸与悬臂长度；随后，基于试验结果建立有限元模型，并开展了系统性的参数分析。结果表明：试件均出现了所设计的弯扭屈曲破坏；减小长细比与肢长比能够显著提高试件承载力。最终，对比美国规范AISC 360-16中厚实截面角钢悬臂试件承载力计算公式的预测结果 ...
叶守杰 +5 more
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Research progress in problem-solving nickel-titanium rotary instrument in endodontics. [PDF]
Hua Xi Kou Qiang Yi Xue Za ZhiCui C, Quan J, Wei X.
europepmc +1 more source
[Latest research progress of rare earth-magnesium alloys in orthopedics]. [PDF]
Nan Fang Yi Ke Da Xue Xue BaoSun Z, Zuo K, Zhu X, Yue H, Gao Z.
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[Research progress on the manufacturing technology of hollow microneedles]. [PDF]
Sheng Wu Yi Xue Gong Cheng Xue Za ZhiZhou S +9 more
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1 000 kV特高压GIL气室SO2超标异常原因分析及改进措施
Dianci bileiqi本研究对一起1 000 kV特高压气体绝缘金属封闭输电线路（GIL）气室SO2超标展开分析。提出现场加压辅助定位方法进行诊断，对异常部位增加X光检测，发现C相气室4垂直段插接触头有疑似脱出部件和疑似点状凸起。现场解体检查发现母触头触指、压环及不锈钢挡圈从正常位置脱出，触指与公触头熔合。提出返厂模拟挡圈拉力测试，发现拉力达到116.5 kN时，挡圈从母触头处脱出。得出母触头内不锈钢挡圈未安装到位，运行中逐渐脱出后，导致触指与母触头接触不良，长期运行电流作用下母触头与触指过热烧蚀引起SF6气体分解 ...
乔振朋 +6 more
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[Bifunctional biomaterials: An innovative strategy for synergistic bone tumor therapy and bone regeneration]. [PDF]
Zhongguo Xiu Fu Chong Jian Wai Ke Za ZhiFeng W, Chang B, Wang C, Fan B.
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Cognition about emergency management of avulsed incisor in children among dentists in Guangdong province. [PDF]
Hua Xi Kou Qiang Yi Xue Za Zhi, 2023 Zhang L +5 more
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Dianci bileiqi, 2015 咸阳橡院双合塑胶有限公司（原西北橡胶研究院双合公司）是一家专业研究、开发及生产系列胶粘剂的高新企业。本公司生产的硅橡胶热硫化胶粘剂应用广泛,对于铜、铁、铝、锌、不锈钢、树脂棒材、聚四氟、玻纤等织物有着很好的粘结性。目前已广泛应用于航空、铁路、电力及不锈钢餐具等行业。被国家电网和避雷器绝缘子行业作为推广应用产品,已出口到印度、伊朗等十几个国家。
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