查询词典 biological population

Logistic single population model is important for studying the increasing laws of the biological population in limited space.

Logistic单种群模型是研究有限空间内生物种群增长规律的重要数学模型。

It may be used to analyze the ecological relation between biological population and its habitat. Finally, the process of the establishment of Cui-Lawson's model, was analyze...

最后，对崔—Lawson氏模型的机理进行分析，认为该模型是基于种群营养的生化过程建立的另一个种群增长的新模型。

Traditional theory of ecological carrying capacity, which was established on the basis of quantitative dynamic of natural biological population, met extreme challenge while applied to human ecosystem research.

建立在自然生物种群数量动态基础之上的承载力理论，当其应用于人类生态系统的研究时，遇到了极大的挑战和困惑。

Impact of population growth on resources environment: population explosion's pressure to land resource, population growth's pressure to biological resources, population explosion's pressure to water resources, population inflation's pressure to energy.

人口增长对资源环境的影响：人口爆炸对土地资源的压力，人口增长对生物资源的压力，人口爆炸对水资源的压力，人口膨胀对能源的压力

Bionic optimization algorithms,simulating the structural characteristics,law of evolution,behavior patterns,and way of thinking of biological or biological population,are computing methods with self-organization,adaptive and self-learning abilities,as well as a good global convergence,parallelism,and robustness.

仿生优化算法是模拟生物或生物种群的结构特点、进化规律、行为模式和思维方法等形成的计算技术和方法，具有自组织、自适应和自我学习能力以及良好的全局收敛性、并行性和鲁棒性等特点。

In this paper the utility analysis is introduced into the basic model for e-financial innovation diffusion by utilizing biological population model as its benchmark so that the point of saturation can be determined more accurately. in addition, empirical studies have been done using data of taiwan credit card and mainland bank card. the result provides theoretic reference for the strategic decision of financial institutions and for the policy-making of the supervisors.

本文在将生物种群模型引入网络金融创新产品扩散的基本模型的基础上将效用引入扩散过程的分析中，从而更准确地判断饱和点的产生，并针对中国台湾信用卡数据和中国内地银行卡进行了实证研究，模型的研究可以为金融机构的战略决策以及管理部门的产业政策制定提供理论参考。

Then, introducing the improved straight-line stabilization method to control the chaotic phenomena in the models, a controller is designed to stabilize the biological population in the oribits where the fixed points lie on, thus eliminating the chaotic phenomena in population to keep the population system in persistent existence.

其次采取改进的直线稳定化方法控制模型所存在的混沌现象，设计并求得了使得生物种群稳定到不动点轨道的控制器，最终消除了种群中存在的混沌现象，从而保持了种群系统的持续生存。

Since near a century ,with the expanding population and advancement of the technology ,people strengthen the domanial using continuously, and lead enlarging the range of use and adding the intensity of use land constantly,for the satisfying increasing demand of people oneself. Changed the upper configuration ,circle of biological physics and chemistrys and balance of biological species and leading change of the global climates and decrease of biological species which can not rverse .

近一个世纪以来，随着人口的膨胀和技术的进步，人类为了满足自身日益增长的需求，不断加强对土地的索取，致使土地利用的范围不断扩大、土地利用强度不断加深，从而改变了地表的形态、生物物理、化学循环及生物物种的平衡，造成了全球气候的显著变化和生物物种不可逆转的减少。

Microbial community biota monitoring-PFU was used to investigate the miniature biological population- Ciliata , as the main research object in the aeration tank in Yan'erwan Wastewater Treatment Plant in Lanzhou.

在兰州雁儿湾污水处理厂采用微型生物群落监测方法——PFU法，以曝气池微型生物种群——纤毛虫类为研究对象，通过PFU监测及同期BOD5检测，发现污水处理厂曝气池纤毛虫物种丰富，以钟虫等固着缘毛目类为优势类群。

Bacillus subtilis str. B5423, Pseudomonas fluorescens str. Pf7-14, nonfluorescent pseudomonads str. P13 are antagonistic to rice sheath blight. Resistance to antibiotic is the character that was chosen to use to mark the strains in order to monitor the population dynamics of the strain on the surface of rice plant and to elucidate the mechanism of suppressing the diseases.

中文题名拮抗细菌的生态学及其对水稻纹枯病的抑制作用副题名外文题名 Ecology of biological control agents and their suppressive effect on rice sheath blight 论文作者李湘民导师许志刚教授苗东华博士学科专业植物病理学研究领域\研究方向植物病害生物防治学位级别博士学位授予单位南京农业大学学位授予日期2002 论文页码总数116页关键词纹枯病拮抗细菌水稻馆藏号BSLW /2003 /S435 /19 Bacillus subtilis B5423，Pseudomonas fluorescens Pf7-14，和非荧光假单胞肝菌Pseudomonas sp.P13是对水稻纹枯病菌有拮抗作用的三支细菌菌株。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐