环

The relationship between PID parameter and the root of the characteristic equation of the closed loop control system has been found out directly.

本文直接找出PID参数与闭环控制系统的特征方程的根之间的关系，只要使特征方程的根在z平面的单位圆内任意取值，然后再求出相应的PID参数，则闭环控制系统必然是稳定的。

Drawback occurred in the classical VSSMC can be alleviated in the proposed control scheme because of importing the eliminating chatterer. According to the control strategy put forward above, corresponding controller for ABS is designed.

利用BOLTMANN-HAMEL方法所推导的双轴车辆动力学方程，可开环或闭环模拟转弯制动车辆的操纵稳定性，特别在分析ABS对车辆转弯制动性能的影响或VDSC系统研究中有重要作用。

As the international sales center of Hanwei Energy Services Corp., currently Long Road has the following major products: high pressure GRE pipeline, production technology and equipment of GRE high pressure pipeline, FGD spray header and large-diameter FRP chimney and stack.

作为汉维集团的国际销售中心，公司目前的主要产品有高压环氧玻璃钢管道，环氧玻璃钢高压管道生产技术与设备，烟气脱硫喷淋管道和大口径FRP烟囱/烟道等产品。

The Chlorohydrin process produces large amount of wastewater, which results in serious equipment corrosion and environmental pollution.

在修饰的银催化剂上可获得一定的环氧选择性，特别是发现一些经过特殊方法制备的铜催化剂显示丙烯环氧化活性和选择性。

Propylene oxide is an important chemical intermediate. At present, the industrial production of PO includes mainly Chlorohydrin process and Halcon process.

环氧丙烷是一种重要的工业原料，目前工业上生产环氧丙烷的方法主要有两种：氯醇法和Halcon法。

The further development of conventional industrial processes of propylene oxide using the chlorohydrin route or oxirane technology is limited due to environmental pollution and its high production cost,so that the demand of exploring novel,economical and clean technologies for PO production becomes important.

环氧丙烷传统的工业生产方法如氯醇法路线或共氧化技术由于环境污染或成本较高等原因阻碍了其进一步发展，开发既清洁又经济的绿色合成技术是环氧丙烷工业今后的发展方向。

Propyleneoxide is produced with chlorohydrin method or Halcon method which gives rise toenvironmental pollution or a large amount of co-product.

是最洁净、廉价的氧源，但工业上除乙烯外，其它环氧化合物还不能通过〓直接高选择性环氧化相应的烯烃制得。

The crosslinked rubber with dicyclopentadienecrosslinkage was prepared by the reaction between the chlorohydrin rubberand the cyclopentadienyl sodium.

以环戊二烯基钠与氯醇橡胶反应，制得了含CPD侧基和双环戊二烯交联的聚合物。

The company mainly engaged in the National one of the top ten chemical companies Juhua Products Group, the main one has Chloromethane, dichloromethane, chloroform, cyclohexanone, cyclohexane, caprolactam, PVC resin, sulfuric acid amine, F11, F12, F22, R600A, R134A refrigerant, antiseptic products, welcome you Tongren call letter and look forward to your cooperation and common development!

公司主要经营全国十大化工企业之一的巨化集团公司的产品，主要有一氯甲烷、二氯甲烷、三氯甲烷、环己酮、环己烷、己内酰胺、PVC树脂、硫酸胺、F11、F12、F22、R600A、R134A制冷剂等产品，欢迎各位同仁来电来函，期待能与你们合作，共同发展！

This ring also name as cholesterin ,so do not take the food which contain too much cholesterin

注二：此环亦称为胆固醇环，平时勿食用含有过量胆固醇的食物。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。