原有

SCIENCE (for Grades 7 -9) is a newly assigned comprehensive course in the new round of educational course reform. Science course takes training the science attainment of students as purpose, it covers the original contents of Physics, Chemistry, Biology and Geography for junior high school, also Astronomy and some intersectional subjects are involved.

科学》(7～9年级)课程是新一轮基础教育课程改革中新设置的一门综合性课程，它以培养学生的科学素养为宗旨，涵盖了原有的初中物理、化学、生物以及地理的内容，同时在天文学及一些交叉学科领域有所涉及。

Under the globalization vision, the city planning design idea of too much" the whole world passed" has caused the city to lose the self-individuality; the phenomenon of" one side of a thousand cities" has already destroyed the character, and has limited the harmony and complementarity of the interurban seriously.

在全球化视野下，过多"全球通"的城市规划设计理念造成了城市在发展过程中越发丧失了自我的个性，"千城一面"的现象已经严重破坏了中国城市的原有特色，并限制了城市间良性发展的协调性与互补性。

Marker-assisted introgression is one of the major applications of molecular information in animal breeding aiming at introgression of one or more favorable genes from a line to another, while keeping the genetic background of the recipient as much as possible. It consists of three phases.

标记辅助导入是分子遗传信息应用于动物育种的一个重要方面，其目的是在标记信息的辅助下将一个品种中的一个或多个优良基因导入另一个品种，同时还要尽可能地保持受体群体原有的遗传背景。

Flood inundated area is one of the most important information to real-time monitoring and quick evaluation of flood damage.

在洪水灾害监测、灾情评估中，洪水淹没范围是最重要的信息之一。提取水体的范围，但很难区分出原有水体和洪灾中淹没区范围。

In order to investigate the variation of controllability and observability affected by network scheduling,the model of scheduling for Networked Control System is established,which has communication constraint on its input and output channel.Utilizing communication sequence to express the scheduling of channel,the model can be transformed into discrete-time switch system.Under static scheduling,using the theory of recursive invariant subspace and its character,a necessary and sufficient condition of NC...

为了研究网络调度对能控性与能观性的影响，对输入、输出通道都存在通信约束的网络控制系统的调度进行建模；利用通信序列表示通道的调度情况，最终将模型转化为离散切换系统；在静态调度下，利用循环不变子空间理论及其相关的性质，给出了网络控制系统能控性、能观性成立的充要条件，并给出了原有控制系统与经网络静态调度后的系统之间能控性、能观性的关系；最后用仿真实例说明了所提结论的正确性。

However, the high inverse size classes'number makes inversion results more instable. In order to overcome the instability, two new inverse algorithms (Smooth Chahine and Smooth No-negative Projection) are proposed.

模拟和实测表明使用这两种算法在不改变激光粒度仪的原有结构情况下，就可大大提高仪器的精度和分辨能力：在颗粒多峰分布的情况下精度提高2倍以上。

Because of their unique properties, it is considered that ionic liquid would be one of potential cleaner solvent.

由于离子液体特殊的性质，人们认为它是一种潜在的清洁溶剂。在原有室温离子液体研究基础上，人们提出了功能性离子液体的概念。

This paper carries on the work that Iota running in Media-SoC firstly.

本文在Iota原有的基础上，首先进行了其在Media-SoC芯片上的测试验证工作。

More than two thousand years ago, when greek found that there existed another kind of number likewhich is totally different from rational number. they can't accept this weird fact and thought this new kind of number was unreasonable, so people called it "irrational number".

两千多年前，当希腊人发现这类数与有理数不同时，人们难以接受这个事实，认为这个怪物的出现是不合情理的，于是给它扣上一顶无理的帽子，原有的数自然是有理的。

Whatever he does, the government's clean image has been irretrievably tainted.

只是不管Karamanlis如何应对，其政府原有的廉洁形象无疑已经无可挽回地被抹黑了。

Compared the voltage negative feedback wire-feeding speed regulation system supported by current positive feedback with the rotational speed negative feedback regulation system, the equivalent condition of the two systems is obtained. Then, a wire-feeding speed regulation circuit for the CO_2 welding machine is designed based on TL494 chip, which has the self-protective function under the condition of current overloading.

通过对电压负反馈配合电流正反馈的送丝调速系统与转速负反馈调速系统的比较，得出了这两种调速系统的等效条件，并采用电压负反馈配合电流正反馈技术，设计了一种以TL494为核心的具有过电流截止保护功能的CO_2焊机送丝调速电路。

Make a model to help you determine the optimal number of tollbooths to deploy in a barrier-toll plaza.

建立一个模型来确定在一个容易造成阻塞的收费区中应该设置的收费亭的最优数量。