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Channel of our country inland river by the local processing of 80 time, those who grow 90 time is comprehensive build with calculated, total course of development of be open to navigation or air traffic of inland river channel achieved 122 thousand kilometer 2002, among them channel of above of 300 tons of class achieves 23510 kilometers, the Yangtse River of 8222 kilometers;, Heilongjiang mixes above of 1000 tons of class channel of Songhua River artery but all fronts be open to navigation or air traffic Beijing of; of barge of 1000 tons of class Hangzhou canal Su Na Duan Jiancheng countrywide example channel, restored north and south the action of waterborne main artery, volume exceeds dimensions of fleet of inland river of annual bottom of 200 million tons of;2002 156 thousand, 17.2 million carring capacity ton, shipping continues to keep large change,; of standardization development trend on the west the attempt that report of river, Hunan river, Jia Lingjiang boat joins, gain remarkable economy and social benefit.

我国内河航道由80年代的局部治理，发展到90年代的全面和有计划的建设，2002年内河航道通航总里程达到12.2万公里，其中300吨级以上航道达到23510公里，1000吨级以上8222公里；长江、黑龙江和松花江干线航道可全线通航1000吨级驳船；京杭运河苏南段建成全国样板航道，恢复了南北水运大动脉的作用，运量超过2亿吨；2002年年底内河船队规模15.6万艘、1720万载重吨，船舶继续保持大型化、标准化发展趋势；西江、湘江、嘉陵江航电结合的尝试，取得显著的经济和社会效益。

Led the production company, operating capacity: 2000 tons of sodium bromide, calcium chloride 30,000 tons, 5,000 tons of sodium bromide, calcium bromide 5000 tons, soda ash, chlorinated benzene, bromine bromide is the main production and management Major domestic enterprises and enterprises of the calcium chloride production.

公司主导产品的生产、经营能力：溴酸钠2000吨、氯化钙30000吨、溴化钠5000吨、溴化钙5000吨，纯碱、氯化苯、溴素是国内主要的溴化物生产经营企业和国内主要的氯化钙生产经营企业。

Production in 4800 tons of potassium sorbate, sorbic acid 4,000 tons, 1,600 tons of calcium citrate, calcium 600 tons of sorbic acid.

年生产山梨酸钾4800吨、山梨酸4000吨、柠檬酸钙1600吨、山梨酸钙600吨。

Company to rely on science and technology, constantly bringing in qualified personnel, advanced technology, has long been engaged in research and development of advanced refractories and technical personnel, equipped with Raymond 4R machine, iron roller mill stone grinding machines for the processing of raw materials of machinery and 300 tons, 260 tons, 70 tons, 60 ton molding presses, 65-meter-long high-temperature tunnel kiln production capacity over 10,000 tons.

公司依靠科技，不断引进人才、先进技术，拥有长期从事耐火材料研发的高级技术人才，配备了4R雷蒙机、铁碾石辊对碾机原料加工机械和300吨、260吨、70吨、60吨成型压机、65米长的高温隧道窑炉，年产能力10000吨以上。

The Company an annual output of 3000 tons of zinc oxide, 3,000 tons of zinc chloride, active zinc powder 1000 tons, 1,000 tons of zinc ingots rough.

本公司年产氧化锌3000吨，氯化锌3000吨，活性锌粉1000吨，粗锌锭1000吨。

And the rapid development of China's automobile tire industry, stimulating the production of rubber additives and stimulate the rapid growth the demand for raw materials have increased tert - butylamine, tert - butylamine serious domestic demand, the majority rely on imports.China's demand for NS in 2004 about 10,400 tons of production of about 7,150 metric tons; It is expected that in 2007, the NS will add production capacity for 12,000 tons, tert - butylamine demand for raw materials will reach 7,800 tons.

我国汽车和轮胎工业快速发展，拉动和刺激了橡胶助剂产量的快速增长，对原料叔丁胺的需求也随之增加，目前国内叔丁胺严重供不应求，大部分依赖进口。2004年我国促进剂NS需求量在10400吨左右，产量约7150吨；预计到2007年，促进剂NS将新增年产能力1.2万吨，对原料叔丁胺的需求量将达到7800吨。

Having imported full sets advanced starch processing technologies and equipments which are all autocontrolling and all circumrotation flowing from Sweden and Holland ,we produce 80,000 Tons of Fine potato starch and 30,000 Tons of modified potato starch,5,000 Tons of Fibre,3,000 Tons of top-quality vermicelli annually.

公司全套引进具有世界先进水平的瑞典、荷兰全自控、全旋流淀粉加工工艺和设备，以内蒙古丰富的优质马铃薯为原料，生产高品质马铃薯精淀粉及系列变性淀粉，生产能力为精淀粉8万吨、变性淀粉3万吨、膳食纤维5000吨，高档粉丝3000吨。

It has registered capital of 5 million USD, total investment of 200 million Yuan RMB and main products of 100,000 tons of acetic acid, 90, 000 tons of acetic aldehyde, 40, 000 tons of crotonaldehyde and 5000 tons of butyl acetate.

中海先锋化工有限公司成立于2006年3月，注册资本500万美元，总投资2亿人民币，主要产品有年产10万吨醋酸、9万吨乙醛、4万吨巴豆醛和5000吨醋酸丁酯。

Is located in Yellow River Delta, located in West Liuqiao Guangrao County Economic Development Zone, the brink of East Green high-speed, convenient transportation and strategic location, covers an area of 350,000 square meters, is a professional Companies are now built with an annual output of 3,000 tons glyoxylic acid, Allantoin 300 tons, 5,000 tons of sodium methanol, ethanol production of 5,000 tons of sodium scale.

广饶县弘达精细化工有限责任公司座落于黄河三角洲，位于广饶县西刘桥经济开发区，濒临东青高速，交通便利，地理位置优越，占地面积达350000平方米，是一家专业化公司，现已建成年产乙醛酸3000吨、尿囊素300吨、甲醇钠5000吨、乙醇钠5000吨的生产规模。

The company has passed ISO9001 international quality system certification; annual production capacity of 20,000 tons to disinfectants based chlor-alkali chemical enterprise, which trichloroisocyanuric acid 6000 tons / year, urinary sodium dichloro isocyanurate 6000 tons / year, cyanide urine acid 8000 tons / year.

本公司已通过ISO9001国际质量体系认证；年产20000吨以消毒剂为主的氯碱化工企业，其中三氯异氰尿酸6000吨/年，二氯异氰尿钠6000吨/年，氰尿酸8000吨/年。

The work of this paper is as follows: 1. Looking back the progressing history of the linear motor, introducing the features of the elevator driven by linear induction motor, radicating the topic of this paper "the digital frequency variable control of the elevator bi-side direct driven by linear induction motor". The research of this paper covers the conventional VVVF control, space vector based VVVF control, vector control and DTC.

本文主要开展了以下几个方面的工作： 1 回顾了直线电机发展历史，电机的驱动技术演变，特别是针对直线电机的驱动，简要介绍了直线感应电机驱动电梯的优点和不同结构类型，对传统的v／f控制，基于空间矢量法的v／f控制，矢量控制，和基于电压空间矢量的直接转矩控制进行了比较，确立了本课题的研究主题：直线感应电机双边直推式驱动电梯的全数字变频控制。

The article combines with the treatment of a superficial civil air defense work to introduce how the grouting method to improve the performance of the backfill soil.

文章从治理漂浮人防工事的角度提出了注浆技术在改善回填土性质方面的应用，并详细阐述了注浆技术的施工流程。