At present, There may existent problems in traditional method of checking and measuring screw thread ring gauge. Based on measured theory, dependability of this way of measurement is analyzed in this paper.

針對我國目前在螺紋環(huán)規(guī)測量方法中存在的問題18禁三级片网免费看，根據(jù)其測量原理進行了可靠性分析。

Bbstract:Bt present, There may existent problems in traditional method of checking and measuring screw thread ring gauge. Based on measured theory, dependability of this way of measurement is analyzed in this paper.

針對我國目前在螺紋環(huán)規(guī)測量方法中存在的問題未满十八av网站，根據(jù)其測量原理進行了可靠性分析影院理论。

Single factor experiments were done with the factors including the width of protrusion and the trolley's velocity, which showed that the surface frictional coefficient decreases with the width of protrusion increasing, and doesn't change with the trolley's velocity changing, which was consistent with the results of the orthogonal experiment. A theoretical model of the horizontal projection of a corrugated bionic surface's contact area was built, which showed that the contact area's horizontal projection decreases with width and interval increasing respectively and that the ratio of the contact area's horizontal projection and the vertical load decreases with the vertical load increasing. It indicated that the surface frictional coefficient decreases with the above three factors increasing respectively. Finite element modeling and analysis of interactions of a plate and soils was done using ANSYS, which showed that the plate frictional coefficient is little relative to soil elastic modulus and decreases with vertical surface pressure and that trolley's pull and vertical displacement of bionic surface's control pilot keep constant almost during the plate being pulled. Finite element modeling and analysis of interactions of a corrugated bionic surface and soils was done using ANSYS, which showed that surface frictional coefficient is little relative to soil elastic modulus and decreases with bionic surface's structural parameters and vertical pressure increasing. However, the three factors all didn't affect the surface frictional coefficient remarkably on the condition of 90% dependability. For the first time, bionic surfaces were applied to screw piles, which formed bionic screw piles, and the contrast experiments showed the bionic screw pile had certain resistance-decreasing effects.

建立了波紋型仿生曲面與土壤的接觸面積的水平投影的理論模型，表明接觸面積的水平投影A隨著波紋型仿生曲面突起寬度一个色桃花综合亚洲综合77综合、兩相鄰突起間距的增大而減小黄色视频免费在线网站，接觸面積的水平投影與波紋型仿生曲面表面垂直載荷之比隨著波紋型仿生曲面表面垂直載荷的增大而減小，進而得出仿生曲面摩擦系數(shù)隨著波紋型仿生曲面突起寬度日韩电影久久久久久精品视频、兩相鄰突起間距以及表面垂直載荷的增大而減型炎耘娜蘸悠低尽；利用ANSYS軟件對平板與土壤的相互作用進行了有限元建模與分析黄色视频污污，表明平板摩擦系數(shù)與土壤彈性模量關系不大，而隨著表面垂直載荷的增大而減忻夥丫镁镁饭?2』粕玜v人人干；平板牽引過程中臺車牽引力和仿生曲面控制節(jié)點垂直方向位移基本保持不變；利用ANSYS軟件對波紋型仿生曲面與土壤的相互作用進行了有限元建模與分析2017人人摸，表明波紋型仿生曲面系數(shù)在一定范圍內(nèi)基本不受土壤彈性模量的影響，隨著波紋型仿生曲面突起寬度国产精品91在线、兩相鄰突起間距以及表面垂直載荷的增大而減小91精品麻豆，但在可信度為90％的前提下，三個因素影響都不顯著国产精品视频2021；首次將波紋型仿生曲面應用于與土壤作用方式以擠壓為主的螺旋樁在线超碰，形成仿生螺旋樁，并與普通螺旋樁進行了沉樁對比試驗国产人妖，表明波紋型仿生曲面應用于螺旋樁樁體表面具有明顯的降阻作用无码自拍日韩视频。

The paper illustrates the design of micro-computer control system for the bolt testing machine. This system improves the dependability, precision and automatization of the device.

為了提高插銷試驗機的可靠性、精度和自動化程度视频亚洲日韩欧美，設計采用了微機控制系統(tǒng)卡通动漫亚洲综合第1页搜索，進行了微機接口電路、繼電電路和抗干擾措施的研究女性精品黄色网。

The Saturn, Columbia, and Eagle and the Extravehicular Mobility Unit have proved to Neil, Mike and me that this nation can produce equipment of the highest quality and dependability.

土星號」運載火箭高清亚洲主播在线播放、宇宙飛船的「哥倫比亞號」與「鷹」等機艙外活動裝置都已向尼爾、邁克和我證實：我國能夠生產(chǎn)質(zhì)量最高和最可靠的設備。

The Saturn, Columbia, and Eagle and the Extravehicular Mobility Unit have proved to Neil, Mike and me that this nation can produce equipment of the highest quality and dependability.

土星&號運載火箭欧美在线视频日韩、宇宙飛船的&哥倫比亞&與&鷹機艙jizz日本jizz，以及艙外活動裝置都已向尼爾、邁克和我證實：我國能夠生產(chǎn)質(zhì)量最高91原视频在线播放、性能最可靠的設備人妻三级视频。

Firstly, the protection of direct lighting about traction substation is discussed. Secondly the excessive voltage made by wave of lighting is analyzed and some advices is given for it .Then a actual traction substation is computed and analyzed about it's excessive voltage, some problem should be considered in-depth are put out. At last , dependability of the measure of protection against lighting in this paper is analyzed.

首先研究了牽引變電所的直擊雷保護，接著對雷電侵入波過電壓進行了分析婷婷5月天综合色色，并提出了雷電侵入波保護措施国产激情午夜福利片在线观看，然后以一個實際的牽引變電所為例對雷電侵入波過電壓進行了計算和分析，并進一步指出了計算中應進一步考慮的若干問題一级黄片录像，最后對本文提到的防雷措施的可靠性進行了綜合的分析被插的很爽很是舒服网站。

The PID control is one of the control strategies that develop earliest, because of its simple algorithm, it was widely used in industry process control for its well LU stick and well dependability, especially suitable for to establish the deterministic control system of the accurate mathematics model.

PID控制器作為最早實用化的控制的控制器已有50多年的歷史，現(xiàn)在仍然是應用最廣泛的工業(yè)控制器o PID控制器簡單易懂精品亚洲福利在观看，使用中不需要精確的系統(tǒng)模型等先決條件偷拍亚州偷拍，因而成為了應用最為廣泛的工業(yè)控制器。