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Since Al〓Ga〓In〓P possesses larger valence band difference to GaAs and wider energy gap, minor carrier reverse injection from base and space charge region recombination in the emitter are effectively suppressed in Al〓Ga〓 In〓P/GaAs HBT. Under most circumstances, quasi-neutral base recombination current dominates the base current, and its ratio to collector current varies little with collector current and temperature, thus greatly stabilizes the current gain.

Al〓Ga〓〓In〓P/GaAs HBT由于异质结的△Ev较大，发射区禁带较宽，有力地抑制了基区少子反向注入流和发射区空间电荷区复合电流；在大多数情况下，基极电流以准中性基区复合电流为主，其与集电极电流的比值随集电极电流和温度的变化极小，稳定了电流增益。

1 The basic components Base station, jurisdiction center, sea area center (1) base station Function receiving ship borne data and broadcast data under the control of the jurisdiction center Configuration Transceiver, base station controllers and network equipment, constituted a internal LAN.

1.1基本组成基站、辖区中心、海区中心。。（1）基站功能在辖区中心的控制下接收船载数据和播发数据。配置收发器、基站控制器和网络设备，内部形成局域网。

In order to ensure quality supply to meet international market requirements, and further with the international standards of agricultural products, the company in accordance with international non-pollution, green vegetables strict standards for operation, efforts to develop national lace vegetable-growing areas of cultivated land as the company's exports of vegetables, plant bases, and base the plant to carry out a unified technical guidance, unity of pesticides and fertilizers to track management, and set up base in detail the various files to ensure that the base production of vegetables achieve "non-polluting, non-" the pollution-free green food standards.

为了保证货源品质达到国际市场要求，进一步与国际农产品标准接轨，公司按照国际无公害、绿色蔬菜标准进行严格操作，努力开发全国蔬菜种植区的连片耕地作为公司的出口蔬菜种植基地，并对基地的种植进行统一技术指导，统一农药、化肥跟踪管理，并建立各个基地的详细档案，保证基地生产的蔬菜达到&无污染、无药残&的无公害绿色食品标准。

After purification and quantification,1 ugof total RNAs were reverse transcribed and amplified by PCR with5'upstream 10 base random primers and one-base or two-base anchored 3'primer respectively,and the amplified products were displayed on asequencing gel side by side.

本文以父本黄早4，母本U8112和杂种一代掖单4号的玉米幼苗为材料，提取总RNA，用5'端随机引物和3'端单锚定或双锚定引物，进行了mRNA的差异展示研究。

The tool tray assembly also includes a base ,means for supporting the base for movement along the ground and a vertically upwardly from the base ,the vertically extending member including an upper end ,and means for removable mounting the tool tray on the upper and of the vertical member with the tool tray and the wheels supported above the ground .

工具盘子汇编并且包括一个基地、手段为支持基地为运动沿地面和a 垂直向上地从基地，垂直延伸的成员包括上端，和意味为可移动的架置工具盘子在鞋帮并且垂直的成员与工具盘子和轮子支持了在地面之上。

Customer base through the characteristics and spending habits of investigation and analysis, can be seen, whether it is the main goal of meeting the target customer base or customer base, are to improve the quality of life for the principle of the largest, mature, rational thinking, to show independence, self-personality, the pursuit of natural, comfortable, introverted taste of life without publicity.

目标客户群对产品细节的需求分析，通过客户群的特点和消费习惯的调查和分析，可以看出，无论是主要目标的目标客户群或客户群，是提高教育质量生活的原则，最大的，成熟，理性思考，表现出独立，自主的个性，追求自然，舒适，品味的生活内向而不宣传。

Over the years, the White Horse Lake Base aquaculture relies on a favorable geographical advantage to develop aquaculture, is now over a thousand million investment, so that the pond lace base, rational layout, roads, drainage, trench support, forming a natural harmony, the layout of a reasonable , perfect facilities, regional characteristics, the base apparent new pattern of aquaculture to "raise the water to fish to water and fisheries" and to promote the concept of eco-farming.

多年来，白马湖水产养殖基地依托有利的地理优势，大力发展水产养殖，现已投资千余万元，使基地池塘连片、布局合理，路、渠、沟配套，形成了自然环境和谐、布局设计合理、设施配套完善、区域特色明显的水产养殖基地新格局，使&以渔养水、以水养渔&的生态养殖理念得到推广。

In recent years, is actively promoting the adjustment of agricultural industrial structure, vigorously develop the efficiency of agriculture and foreign exchange in agriculture, forming a 4000 acre Dong wild rice stem, 18,000 acres of the export of vegetables, 1,600 acres of sun-cured tobacco the three major characteristics of the agricultural base, and continuous development and expansion of the agricultural enterprises the establishment of joint enterprises base, base of the industrialization of rural households associated business model.

近年来，正积极推进农业产业结构调整，大力发展效益农业和创汇农业，形成了4000亩董家茭白、18000亩出口蔬菜、1600亩晒红烟三大特色农业基地，与不断发展壮大的农业企业建立了企业联基地，基地联农户的产业化经营模式。2002年实现农村经济总收入7.97亿元，创农民人均收入4950元。

Red Star Plum base was classified as "national export-oriented agricultural Fan District Agricultural Industrialization '815 'Project Red Star Plum demonstration district" as the province's largest Plum cultivation base and the main export base.

1996年红星青梅基地被列为&国家外向型农业范区农业产业化'815'工程红星青梅示范小区&，成为我省最大的青梅种植基地和主要出口基地。

The system is base on Spring by integrating Struts and Hibernate.First,the paper explained for using Spring and advantage of using Spring;next,analyse system's function,devide function module,choose development tool and implementation technical,design database module on the base of user's demand and system environmental;then,make implementation details for the modules of system,emphatically expound some technical,like use of Spring Ioc and AOP,certification model of licence,document manage base on Jacob and dynamic function calls;last,test the system and give advice to improve the defects.

本系统是基于Spring框架构建的J2EE系统，并整合了Struts和Hibernate框架，文章首先论述了采用Spring框架开发的理由和采用该框架的好处；其次根据用户需求和系统使用环境，对系统功能进行分析，划分出各个功能模块，确定了开发工具和实现技术，并设计出数据库模型；然后对系统各模块进行详细设计，着重阐述了Spring IoC和AOP的使用、许可证认证模式、基于Jacob的文档处理和函数的动态调用等关键技术；最后对系统进行功能测试，并提出对一些不足之处的改进思路。

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。