Results 111 to 120 of about 4,900 (130)

[A randomized controlled trial of iRoot BP Plus used as pulp capping agent in the complex fracture of young permanent tooth]. [PDF]

Beijing Da Xue Xue Bao Yi Xue Ban
Yang Y, Li R, Dou G, Lei Y, Xia B.
europepmc   +1 more source

[Three-dimensional morphological analysis of posed smile]. [PDF]

Beijing Da Xue Xue Bao Yi Xue Ban
Xiao Y, Mao B, Zhou Y.
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[Positive cortical support reduction in treatment of trochanteric femur fractures: history in theory establishment and its inspiration for clinical innovations]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Chang S.
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[Soft and hard tissue changes of hyperdivergent class Ⅱ patients before and after orthodontic extraction treatment]. [PDF]

Beijing Da Xue Xue Bao Yi Xue Ban
Mao B, Tian Y, Wang X, Li J, Zhou Y.
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[Development of a machine learning-based ionization efficiency prediction model for per- and polyfluoroalkyl substances and its application in semi-quantitative analysis]. [PDF]

Se Pu
Sun SZ, Li YY, Gao Y, Li KC, Chen Z, Li XQ, Zhang QH.   +6 more
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Application of digital technology in the repair of functional and aesthetic defects in patients with acid erosion and severe attrition: a case report. [PDF]

Hua Xi Kou Qiang Yi Xue Za Zhi
Hou W, Zheng X, Chen X, Cai W, Wang C, Su Z, Zhao J.   +6 more
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[Expert consensus on local anesthesia application in pediatric dental therapies]. [PDF]

Hua Xi Kou Qiang Yi Xue Za Zhi
Wang Y, Zou J, Ji Y, Wang J, Xia B, Zhao W, Wu L, Song G, Liu Y, Chen X, Shang J, Du Q, Guo Q, Jiang B, Zhang H, Xing X, Li Y.   +16 more
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齿轮加工技术的发展与应用

工程技术前沿
齿轮加工技术的发展与应用紧密契合现代制造业对高精度、高效率和绿色化的需求。随着航空航天、汽车及能源装备等产业的快速推进，齿轮作为核心传动零件，其加工水平直接影响整机性能。近年来，齿轮加工装备在高速高效、高精度、功能复合与智能化等方面不断突破。滚齿机、插齿机、磨齿机等设备借助高性能主轴系统和数控技术，实现了切削效率与精度的显著提升。高速化体现在主轴转速和工作台转速的大幅提高，配合大功率主轴系统有效延长刀具寿命并降低成本；高精度依靠直线导轨、滚珠丝杠、电主轴和力矩电机的应用，使粗加工也能满足高等级精度要求 ...
闫巍, 杜金成
semanticscholar   +1 more source

风电齿轮箱管轴渗漏油分析及处理办法

环球科学与工程
王福东，王艳飞，罗文振 南京高速齿轮制造有限公司，江苏南京 摘要：齿轮箱是风电机组中重要的组成部分，随着齿轮箱运行年限的不断增加，会出现渗漏油现象，而管轴处的渗漏油会影响机组的安全、可靠运行。本文根据较多案例，对齿轮箱管轴漏油原因进行分析，并提出一种可靠的维修方案，提高防护性能，有效解决管轴渗漏油问题。
王福东, 王艳飞, 罗文振
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齿轮—连杆组合传动机构设计与仿真研究

社会发展与科技创新
齿轮—连杆组合传动机构是齿轮传动的精准化和连杆传动的灵活化，广泛应用于机床、工程机械、自动化设备等领域，传动性能是设备运行的稳定性、工作的效率决定性因素。这类组合机构可实现复杂的运动传递与轨迹控制，满足单独的齿轮或连杆机构无法满足的传动需求，但设计时必须考虑齿轮与连杆适配性，避免传动干涉、运动卡顿等现象发生。本文围绕齿轮—连杆组合传动机构设计与仿真展开研究，摒弃理论推导，重点从实际设计与仿真出发，明确组合机构的传动特点与设计要求，完成机构整体结构设计与核心零部件设计，通过仿真分析验证机构传动性能 ...
浩赟 王, 亚洲 齐
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