生物数学

The basic theory and methods of Biomathematics have a significant impact on the development of contemporary biology, and biology in the broad field of applications.

生物数学的基本理论与方法对当代生物学的发展产生重大影响，并在生物学有关领域得到广泛应用。

Medical biomathematics is an important basic course in high medical college.

医用生物数学》是高等医学院校一门重要的基础课程。

In this paper,the history of development,main study substances and methods,the significance of research and the trend in future of development for the biomathematics were expounded.

介绍了生物数学发展历史、研究意义、主要研究内容和未来发展趋势。

At the same time, according to the biomathematics meaning of this model, it carries on qualitative analysis to the mutually beneficial economic relation among travel industry and other relevant industries for the first time, and then pointing out the pluses and minuses of this method .

同时，根据该模型的生物数学意义，对旅游产业和其他相关产业间的互惠经济关系初次进行定性分析，进而指出该方法的优缺点。

Key words: biomathematics; optimal harvesting problem; stochastic differential equation; mutualism model; harvesting cost

关键 词：生物数学；最优捕获问题；随机微分方程；互惠模型；捕获费用

A class of nonlinear two species competition singularly perturbed initial-boundary-value problems in a reaction-diffusion system in biomathematics was studies using the modern method of differential equation.

利用微分方程的近代方法研究了生物数学中一类非线性两种群竞争模型的反应扩散系统奇摄动问题。

In this dissertation,the biostatistics and biomathematics methods are used to analyze the characteristics of motif in protein superfamily.The paper mainly includes the analysis of motif characteristics,conservative motif distribution,features extraction and the identification of the protein superfamily.

本文以蛋白质超家族中的模体和序列为研究对象，用生物统计学和生物数学中的方法，从蛋白质超家族中的模体功能特征分析及相对位置分布统计、信息特征提取和蛋白质超家族识别这三个方面进行了研究。

How to solve linear delay differential equation plays a very important role in dealing with some biological-mathematics issue.

在解决一些有关生物数学的问题时，经常会遇到求解具有延迟的微分方程。

The 21st century is a century of life science,the mathematical biology advanced rapidly, and the study in determinate system is perfect. In face,the species ecology systems are often subject to ,some uncertain factors,white noise,whether the presence of such noise affects these results that we have obtained has received exten sive attention ,which makes the study about stochastic system more and more important.

21世纪是生命科学的世纪，生物数学的发展突飞猛进，百花争妍，其中对确定性系统的研究已经较为完善，而实际上的种群系统常受到一些不确定性因素的干扰，即白噪声的干扰，研究白噪声的存在是否影响种群生态系统以及是否使原有的结果发生变化已受到广泛的关注，这就使对随机系统的研究显得尤为重要。

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。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。