Focused on many problems existing in pressure control system of drilling pipe friction welding,such as high failure rate and poor amenability,the basic principles of friction welding and electro-hydraulic proportional technique were briefly described.

針對焊接鉆桿連續(xù)驅動摩擦焊機采用開關閥組成壓力控制系統(tǒng)存在故障幾率高xigouqi.com、可控性差等問題，將電液比例控制技術應用在摩擦焊壓力控制中欧美交性又色又爽又黄，實現了摩擦焊軸向壓力閉環(huán)控制白白白免费视频观看爱、滑臺進給速度的開環(huán)控制；可對摩擦焊機主軸速度怕怕怕18成禁人视频免费、軸向壓力殴美伊人一本在线观看av、軸向縮短量、主電機電流久久精品A片777777、油溫等進行實時檢測天天天色踪合。

Above results suggest that the nuclear genes controlling amyloplast development may express in the uninuclear microspore and continue to be active in the VC, while the genes controlling plastid dedifferentiation may be promoted in the GC after the first mitotic division.

以上結果表明可能控制造粉質體的核基因在單核小孢子中表達并繼續(xù)在營養(yǎng)細胞中起作用，而控制質體脫分化的基因在第一次有絲分裂后才在生殖細胞中被啟動一级特黄特色的免费网站。

Then analyzed has compared the contravariant controller control strategy, in established in the SPWM inversion linearization model foundation to analyze the necessity which double-circle controlled, and in controlled in the link to introduce the PID adjustment, enhanced the control the dynamic response ability and the system stability, enhanced the power source the load compatibility and the output stability.

接著分析比較了逆變控制器的控制策略国产一级A片午夜无码免费，在建立了SPWM逆變器的線性化模型基礎上分析了雙環(huán)控制的必要性，并在控制環(huán)節(jié)中引入PID調節(jié)黄片视频2019，來提高控制的動態(tài)響應能力和系統(tǒng)的穩(wěn)定性色色色中心，以提高逆變電源的負載適應性和輸出的穩(wěn)定性。

Based on the foundation of the virtual prototype model of the medium-speed maglev train, using the mechanical dynamics and kinematics analysis software ADAMS, this paper expatiates on the following things. Firstly, it analyses the decouple of single magnetic bogie by the simulation and experimentation; secondly, adds the magnetic levitation control system to the single magnetic bogie model and simulates; thirdly, by simulating the motion of the train running on the different type of guideway, analyses the state of the train on the ramp and crankle;in the end ,this paper does a further research on how the magnetic levitation control system and guideway parameters affect the suspending gap when the train runs on the ramp and crankle .

論文在建立了中低速磁浮列車虛擬樣機模型的基礎上人人操人人操操，借助于機械系統(tǒng)運動學及動力學分析軟件ADAMS日韩www，首先從單轉向架出發(fā)，仿真分析了磁浮列車單轉向架的解耦能力免费网站在线观看人成视频；接著對單轉向架樣機模型進行了控制系統(tǒng)的仿真又色又粗又黄又爽视频；然后對一輛整車在豎曲線和平曲線的運行在ADAMS中進行了仿真，分析了列車在坡道和彎道上的運行狀態(tài)孕妇精品AⅤ在线；最后對磁浮列車在坡道和彎道上運行時的系統(tǒng)性能進行仿真分析www,欧美，進一步研究了控制系統(tǒng)和線路參數對磁浮列車懸浮性能的影響。

He said there were marked differences between cases and controls in all aspects."The cases had longer labors, bigger babies, and a higher incidence of occiput posterior position," he said. Shoulder dystocia occurred in about 25% of cases and in 5% of controls, he said.

他表示美女久久三级视频网站，病例與控制組在許多方面有明顯的差異色色的视频网络，這些病例中有分娩異常的發(fā)生率，包括較長的分娩国产一级特黄aa毛片、較大的嬰孩欧美综合图区亚欧综合图区、以及較高的頭部朝后生產黄色视频免费试看一下，另外間部難產的發(fā)生率在案件中，大約占25%欧美久久性情一级A片，而在控制組中約為5%欧美熟妇人妻BBBBBⅩXXXX。

First, the paper reviews the development and research of AC transfer speed system, introduces the different control strategy of transfer speed system for asynchronous motor, and discusses the basic principle of vector control system for asynchronous motor in detail,including the mathematics model and coordinate transformation of asynchronous motor, the fundamental equation of vector control, the estimation method of rotor flux, the system structure of vector control etc. Then, the paper lays stress on the fundamental principle, control algorithm and realization method in TMS320LF2407 of space vector pulse width modulation technology.

本文首先簡述了交流調速系統(tǒng)的發(fā)展和研究重點，介紹了異步電機調速系統(tǒng)的不同控制策略狼友视频在线播放，詳細論述了異步電機矢量控制系統(tǒng)的基本原理：異步電機的數學模型和坐標變換影音先锋每日资源站、矢量控制的基本方程式、轉子磁鏈的觀測方法欧美激情性爱A片、矢量控制的系統(tǒng)結構等露出亚洲一区，并重點分析了空間矢量脈寬調制技術的基本原理、控制算法以及在TMS320LF2407中的實現方法WWW、欧美日韩性生活片、com。

In 2003,on the whole the soils in Wujiang were little acid, pH from 6.40±0.38 to 5.40±0.55now, and the trend of acid was in Tailake region. The available phosphorous in Paddyfield were significantly lower than. the other five land use patterns. As a result,controlling the phosphorous output form vegetable field mulberry yard and other dryland might be more significant to control the non-point pollution in Tailake region.

吳江市土壤基本上屬微酸性土壤日本色www，2003年耕地監(jiān)測中土壤pH值由1982年的6.40+0.38變?yōu)?.40±0.55，可見近20年來太湖地區(qū)普遍存在的酸化趨勢五月婷婷激情网站；在稻田可以在线看的av网站、林地、桑園欧美色色一区、菜地www.精品视频.com、果園、旱地六種常見的土地利用方式中美女黄片a，稻田土壤速效磷顯著低于其它五種利用方式中欧美片aaaaaaaa片；因此，在控制太湖地區(qū)磷的面源污染上色色男人网，控制菜地黄片无码A级、桑園和其它旱地土壤磷的輸出可能更為迫切。

The investigation and simulation results show that the two methods are effective and practicable on predicting for and controlling the movement cross direction of shipping: periodogram predictor and controller is super than optimal predictor andcontroller in the case of large-scale nonlinear system.

本文通過理論研究和大量仿真計算結果表明成年人福利视频，利用這兩種方法進行船舶橫向運動姿態(tài)預報及控制均是可行的：周期圖預報及控制的方法在船舶大范圍運動的預報控制中婷婷五月综合视频精品，控制效果比經典的LQG控制效果更好。

The main achievements of the project are as follows: 1 the hypothesis that a decrease in seed mass causes an increase in mean dispersal distance has been tested based on the experiments of weed dispersal by wind. The experimental results partly support the hypothesis. The results will help farmers to make an optimal strategy of weed control; 2 a statistic method for inferring probabilistic distribution function of a random variable has been developed, by which probabilistic distribution functions of weed species dispersal have been determined; 3 the reproduction structure of Bromus sterilis has been studied; 4 a more complex CA model with 25 neighborhood cells were built, which can simulate spread of a weed population. This work promotes developments in both theory and application of CA models; 5 the "mean law" in weed control has been proposed. Accordingly, the algorism of patch spring may be calibrated; 6 the "patch" and "true patch" have been mathematically defined so that herbicide can be efficiently applied; 7 simulation validates that initial configurations of weed will affect dispersal of its population and strategies of controlling it, or its distribution patterns affect its dispersal progresses.

主要完成的工作和取得的成果有：1）用實驗證實了重量較輕的雜草種子并不一定飛得比較重的遠超碰99re91伊人公开精品，其結果有助于農民制訂雜草的優(yōu)化控制策略黄片@126.com；2）發(fā)展了一種推斷隨機變量分布函數的統(tǒng)計方法并用它來獲得了幾個雜草種的擴散分布函數；3）對雜草Bromus sterilis的繁殖結構進行了研究天天视频黄色片；4）建立了一個具有25鄰的較復雜的能模擬雜草擴散的CA模型性色一区二区，并在理論和應用方面促進了CA模型的發(fā)展；5）在雜草控制方面提出了&平均法則&野花香高清视频在线观看，據此可對按塊施藥方法進行校正91黄色视频在线免费看；6）精確地定義了&塊&和&真塊&以便在雜草控制中能更有效地使用除草劑；7）模擬證實雜草種群的初始配置影響其擴散和控制策略国产免费午夜福利播放视频，或者格局影響過程欧美www视频在线观看。

This paper focuses on the control theory and design method of master-slave robot system,that can implement precise teleoperation by means of force telepresence technology under the unstructural environment.

本文研究借助力覺臨場感技術實現主從機器人遙操作的控制理論和設計方法欧美大屌插逼，基于對控制系統(tǒng)的動力學分析，在力和運動的雙向控制中采用力反射伺服型控制方案久久久久国产一级男女毛片高清版，實驗結果表明了該方案的可行性免费看黄色毛片网站播放，顯示了在非結構性環(huán)境下臨場感在增強人機交互能力方面的優(yōu)越性。