以...为基础

In recent years, the researches in mathematical biology which modeled by normal differential equations are mainly concentrated on two branches: 1 continuous biological dynamical systems; 2 impulsive semi-dynamical systems.

生物数学中以生物动力系统为基础的研究近年来得到了长足的发展，其中以微分方程为模型的研究工作主要集中在连续动力系统和脉冲动力系统上。

The feeding and excretion of three little fishes (Hemiculter. leucisculus, Tilapia. aurea and Cirrhinus. molitorelld) was studied and their effect on water quality of Qiankeng reservoir in Shenzhen City Around the topdown effect of fish was also studied. Based on the analysis of their stomach contents, their diet composition was assayed. The three fishes" feeding rhythm in cage and their rate of digestion indoor were looked into, and their daily ration was estimated through the method of daily average fullness index. Using the spectrophotometer, the content of chlorophyll a in the stomach was measured, and the feasibility of taking the chlorophyll a as an index of measuring the feeding of fish on phytoplankton was studied. Adopting the national standard method, the effect of the three fishes" excretion on total nitrogen, total phosphorus, CODMn, pH, turbidity and conductivity coefficient was surveyed. The effect of feeding and excretion offish on water quality was discussed and the results revealed as follows:H.

围绕鱼类的下行效应，本文以深圳茜坑水库三种小型鱼类Hemiculter leucisculus罗非鱼Tilapia.aurea和鲮鱼Cirrhmus.molitorella为研究对象，以胃含物分析为基础，分析了三种鱼类的食物组成；调查了网箱中自然状态下三种鱼的摄食节律，在室内调查了三种鱼的食物消化速率，运用日平均饱满指数法计算出三种鱼的日粮；采用分光光度法测定了鱼体肠叶绿素含量，探讨了叶绿素作为鱼类对浮游植物摄食量衡量指标的可行性；采用国家标准的水质测量方法，测定了鱼类排泄对总氮、总磷、高锰酸盐指数、pH、浊度和电导率的影响量。

Funded by their lucrative success in the role-playing game business, and based on one of their game's premises, the $2.5 million center runs seven days a week in a mall on the North Pier in downtown Chicago.

以他们在角色扮演类游戏中所获得的丰厚利润为资金来源，以他们的某个游戏场所为基础，这个价值250万美金的游戏中心一周营业七天，每天24小时，地点在芝加哥市中心北码头的一家购物中心里。

Moreover, ostensive definitions function on the condition of the understanding of a language, which means just the overthrow of the theories of meaning which take ostensive definitions as their starting points.

并且，实指定义以理解一门语言为前提，正是对以实指定义为基础来解释意义的意义理论的颠覆。

The basic economic problem made by this system is a contrarary phenomenon:there exist agreat number of overstocked urban housing when there exist a...

随着市场经济发展，中国的城市住房需求将发展成以经济因素为主要因素的理性需求，住房的供给也将发展成为以资金的合理循环为基础的、可以有产出的经济行为而不再是一种政府行为。

To network in order to ensure patency.

市场的全球化竞争已成为趋势，对于中小企业来说，在调整发展战略时，必须考虑到市场的全球竞争战略，而这一切将以信息化平台为基础，以网络通畅为保证。

Based on the shortest path matrix of 20 cities, we have quantitatively evaluated the highway network development level of the region by the accessibility index, extension index, conglomeration index, and etc. The result shows that in the space structure the highway network development level is a "core-margin" model. The cities with higher accessibility indexes gather around Zhengzhou City, while those with lower ones distribute in the margin. The order among conglomeration index is accordant to that of accessibility index.

以通达指数、伸展指数、趋中指数等为衡量指标，以20个入网城市的最短路径矩阵为基础，对中原城市群区域高速公路网络的发育程度进行定量评价，结果显示：中原城市群高速公路网络在空间格局上呈现明显的"核心－外围"模式，通达指数最高的城市集中在中心城市郑州周围，较低的城市分布在外围地区，且趋中指数排序与通达指数排序相吻合。

Thus the exploitation of the courseware is on the basis of pedagogics and on the guide of cognitive psychology together with cognitive psychology.

因此，课件的开发以教育学为基础，以认知心理学、软件工程思想为开发指南。

With the guidance of foundation theory such as geotechnical engineering, garden vegetation, pedology, soil magnetism and environment engineering and the base of slope ecological protection, this paper studies ecological material protection techniques which is suitable for abrupt rock slope.

本文以岩土工程、园林植被学、土壤学、土壤磁学、环境工程基础理论为指导，以边坡生态护坡理论为基础，研究了适宜岩质陡边坡生态恢复的生态基材护坡方法。

According to recent situation of control point data management in practicalness,to tendency and to actual requirement,this essay investigates the organization and input of system data based on MapInfo,based on hard and soft facilities of the computer,based on the technology of GIS,at the same time,this essay puts forward to radical conceptions and methods of the management system of control measurement data.

结合生产实践对控制点测量成果管理的现状、趋势及实际需要，依据GIS的基本原理，以计算机硬软件设备为基础，以地理信息系统为手段，主要针对MapInfo这一系统平台具体讨论了系统数据的组织及入库，提出了GIS在控制点测量成果管理系统的基本构想和方法。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。