地表粗糙度 - Open Access .click

Results 51 to 60 of about 516 (98)

, 2007
使用電磁波探測地形以往皆用於空載或是衛載的雷達，以大尺度的距離探測地表。本文探討採用地面雷達來探測地表地形，求取距離及地面傾斜度，並進而成像的可行性。由於地面對入射電磁波有散射及反射的效應，本文對此兩者分別加以推導，探討反射訊號及散射訊號之影響因子。本文中實驗分為兩部分，第一部分是由時域上反射訊號的延遲時間推算距離，不論散射或是反射在傳輸時間上都是相同的，只要能正確的算出訊號到達時間，就可得到目標物距離。第二部分借由土壤散射模式，由頻域訊號之能量大小推算散射係數，若地表粗糙度、含水量為已知 ...
Chen, Ying-Chen, 陳盈蓁
core

[Mechanisms and protective strategies for astronaut skin injury in deep space environments]. [PDF]

Zhong Nan Da Xue Xue Bao Yi Xue Ban
Xie Y, Zeng J.
europepmc +1 more source

塔克拉玛干沙漠北缘近地层气象要素变化特征/Variation Characteristics of Meteorological Elements near Surface Layer in North of the Taklimakan Desert[J]

, 2014
利用塔克拉玛干沙漠北缘哈德自动气象站2011年1～12月近地面层气象要素梯度观测资料，分析了该地区近地层风速、气温和相对湿度的日变化规律及四季廓线特征，并计算了哈德观测点大气稳定度和中性条件下的地表粗糙度。结果表明，哈德地区近地层0．5～10 m高度范围内气温、相对湿度和风速都呈现出明显的日变化特征。其中，风速为白天高、夜晚低，中午15：00各层风速均达到最大，凌晨04：00降至最低，其日变化幅度为1．1～1．7 m/s；14：00～15：00各层气温均为最大值，最低气温出现在05：00～06：00 ...
ALI Mamtiming +12 more
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[Application of local pedicled mucosal flap combined with type a botulinum toxin injection in the treatment of refractory contact granuloma of the larynx]. [PDF]

Lin Chuang Er Bi Yan Hou Tou Jing Wai Ke Za Zhi
Sun Z, Meng W, Sun G, He S.
europepmc +1 more source

[Effect of printing orientation on physical and mechanical properties of 3D printing prosthodontic base resin materials]. [PDF]

Beijing Da Xue Xue Bao Yi Xue Ban
Zhan X, Cao L, Xiang D, Tang H, Xia D, Lin H. +5 more
europepmc +1 more source

[High-Throughput Detection of Multiple Classes of Antibiotics in Source Water Using a Functionalized Polyacrylonitrile Nanofiber Membrane]. [PDF]

Sichuan Da Xue Xue Bao Yi Xue Ban
Wang K, Nian Q, Wang C, Zhang Q, Xu Q.
europepmc +1 more source

[Effects of surface treatment on the phase and fracture strength of yttria- and magnesia-stabilized zirconia implants]. [PDF]

Beijing Da Xue Xue Bao Yi Xue Ban, 2023
Ding Q +5 more
europepmc +1 more source

[Defect modification of calcium silicate and its application in oral bacteriostasis and tooth remineralization]. [PDF]

Hua Xi Kou Qiang Yi Xue Za Zhi
Hu Y +6 more
europepmc +1 more source

[Stroke-p2pHD: Cross-modality generation model of cerebral infarction from CT to DWI images]. [PDF]

Sheng Wu Yi Xue Gong Cheng Xue Za Zhi
Wang Q, Zhao X, Liu X, Zou Z, Nan H, Zheng Q. +5 more
europepmc +1 more source

[Extracellular matrix materials and tissue regeneration and repair]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Zhao L, Xie H.
europepmc +1 more source