three-point contact 中文意思是什麼
three-point contact
解釋
三個支點接觸巖面-
Rolling bearings - three - point and four - point contact ball bearings - boundary dimensions
滾動軸承三點和四點接觸球軸承外形尺寸 -
The main job of this research is : ( 1 ) analyze the operation situation of power system during faults ; pay attention to the traveling wave on the three - phase transmission line ; study the equation of voltage on three - phase transmission line with impedance capacitance coupling between phases ; contact the voltage on any point with the fault voltage, study the singularity of the voltage signal in fault point, and make it to be the base of the new fault detection method ; ( 2 ) apply the singularity detection theory based on wavelet analysis to the power system faults detection, give a complementary criterion to current fault detection criterion, study how to select the basic wavelet, how to filter noise, how to detect the singular point or fault point, and finally give a total solution. the simulations prove it to be a quick, correct and effective fault detection method
本文的主要工作有： （ 1 ）分析電力系統在發生故障時的運行狀態，尤其對三相傳輸線上的故障行波進行了分析和研究，推導了考慮相間耦合的三相傳輸線電壓方程，並將傳輸線上任一點的電壓與故障點電壓建立起聯系，得出了傳輸線上電壓信號在故障點處的奇異性，並以此作為構造新的故障檢測演算法的理論基礎； （ 2 ）將基於小波變換的信號奇異性檢測理論運用於電力系統故障檢測中，針對目前相關研究的不足，提出了電力系統故障檢測判據的補充判據，通過對基本小波的選擇、除噪措施、信號奇異點也即故障點的檢測方法所作的分析，給出了一個可行的解決方案；模擬研究表明：這是一個快速、準確、有效的故障檢測演算法。 -
The neglecting of the social contact activities in the design process will bring on a series of social problems, such as make the residents indifferent to each other, and the environments lack of spirits. in order to solve these existing problems, this thesis focus on the social contact space of neighborhood in the residential area, take the point of the architectural spatial view, and the study is based on the relationship between social contact activities and the environment. the study process is : first of all, the social contact space is divided into three levels, according to the territory and proximity of people, the communication ways which are different in space scale, and the attributes of the residents
針對這種情況，論文以居住小區鄰里交往行為與空間環境的關系為基礎，從建築空間角度對城市居住小區戶外鄰里交往空間進行系統研究，具體的研究過程是：首先，根據人們在鄰里交往空間中不同領域范圍交往活動的心理感受、交往方式、交往人群的差異，將居住小區戶外鄰里交往空間劃分為公共? ?半公共? ?半私密三個層層銜接的基本空間層次，即鄰里中心交往空間，宅前交往空間和戶前交往空間，以此作為論文研究的基本框架。 -
Experimental and finite element analysis of three point bending ( tpb ) test were conducted. it is found material ' s anisotropy of anisotropic materials and poission ' s ratio of isotropic materials all had influence on contact deformation between specimen and fixture. so it is wise to get flexural properties using four point bending test
4 .通過試驗和有限元分析發現，造成對三點彎曲試驗測得的三維編織復合材料的彎曲模量遠低於四點彎曲試驗結果的原因:材料的各向異性和泊松比對於三點彎曲試驗的壓頭和支座處的局部接觸變形影響很大 -
Internal micrometers with three - point contact
三爪內徑千分尺
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