Results 111 to 120 of about 15,266 (166)

A Study on Formation and Characteristics of Sandy Dunes in the Eastern Coast, Changle, Fujian [PDF]

, 2008
本文作者依托雷怀彦教授的省基金项目“福建海岸风沙形成机理及危害的防治研究”结合近年来国内外学者对海岸风沙的研究情况，通过野外调查与室内分析，在获得大量野外调查数据的基础上，重点对长乐东部海岸沙丘形态特征、沙丘沉积构造特征、海滩沙与风成沙的对比分析、海岸风沙粒度特征这几个方面进行了研究讨论，分析了研究区域沙丘的成因并对海岸带的风沙灾害提出了防治措施。 在总结前人研究成果以及野外实地调查基础上分析了长乐东部沿海海岸沙丘的形成发育原因，认为风况、沙源和地形空间是形成该地区海岸沙丘的基本条件。另外 ...
杨锐
core  

无杆抽油机系统运行状态评价方法研究

Shiyou jixie, 2014
以水基动力无杆抽油机为对象，运用分形维数理论，结合信号频域分析方法，针对其正常运行、油管漏失、供液不足以及游动阀关闭迟缓4种不同工作状态进行分析，并在此基础上进行系统运行状态的定性与定量的评价分析。首先运用振动信号的频域分析方法对系统工作状态进行初级判断，再运用分形盒维数理论进行系统的压力流量示功图分析二级评价。分析结果表明，水基动力无杆抽油机振动信号的中值频率能够定性地分析系统运行状态；分形盒维数能有效地反映系统不同的运行状态。研究结果有利于系统故障诊断的智能化并减小人为因素影响 ...
谭笑, 马超, 陕梅辰, 徐小力, 智玉杰   +4 more
doaj  

[Clinical application research of three-dimensional printed patient-specific cutting guides in Cole midfoot osteotomy]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Zhang Z, Qin B, Li J, Yin S, Ren Y, Chen Y, Liu X, Zhang H.   +7 more
europepmc   +1 more source

[Method of constructing 3D facial smile simulation sequence data based on non-rigid registration]. [PDF]

Beijing Da Xue Xue Bao Yi Xue Ban
Wen A, Zhang X, Yang Y, Gao Z, Li W, Shan S, Shang X, Tian Y, Guo S, Wang Y, Wang Y, Zhao Y.   +11 more
europepmc   +1 more source

吉林省西部盐碱化区热力景观特征分析 [PDF]

, 2015
吴波, 周慧杰, 王德辉, 王萌, 董福湘   +4 more
core  

[A multi-view stereo vision methodology for digital soft-tissue impressions in fixed implant rehabilitation of edentulous patients]. [PDF]

Beijing Da Xue Xue Bao Yi Xue Ban
Yang Y, Tian Y, Shan S, Li W, Shang X, Wang Y, Guo S, Gao Z, Wen A, Zhao Y, Wang Y.   +10 more
europepmc   +1 more source

[Exploration and clinical application of the "digital and intelligent surgery" diagnosis and treatment workflow for oral and maxillofacial tumors]. [PDF]

Beijing Da Xue Xue Bao Yi Xue Ban
DU W, Zhang W, Yu Y, Liu S, Su H, Hu L, Tang Z, Wu B, Chen Z, Li J, Wang H, Peng X.   +11 more
europepmc   +1 more source

[Silybin inhibits fibrosis after glaucoma filtration surgery in rabbits by promoting fibroblast autophagy]. [PDF]

Nan Fang Yi Ke Da Xue Xue Bao
Zhang Y, Shen Y, Tong X, Duan Y, Luo Y, Guo W.   +5 more
europepmc   +1 more source

[Short-term effecetiveness of endoscopic lumbar discectomy combined with annular suturing in treatment of lumbar disc herniation]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Zhang S, Yao F, Liao Z, Wang T, Shen M.
europepmc   +1 more source

[Study on influence of tooth-supported osteotomy guide plates on the accuracy of mandibular segmental resection and its surgical outcome]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Ma H, Liang K, Qiu R, Liu L.
europepmc   +1 more source