异构的

Propose a novel MAC protocol for MIMO-based WSNIn order to solve the problems that the process of accessing channel is complex and pronely causes collisions in MIMO-based WSN,a heterogeneous WSN models and a centralized TDMA scheduling algorithm based on the networks models are proposed in this paper.

3提出了新的基于MIMO的无线传感器网络的TDMA调度算法针对基于协作式MIMO的无线传感器网络节点接入信道过程复杂、容易产生碰撞等问题，提出了采用异构无线传感器网络模型和基于该网络模型的集中式时分多址(Time Division Multiple Access，TDMA)调度算法。

Then we describe the design of system database,give a recountal of how to store geographic data in SQL database.

文章结合地理数据的特性，介绍了系统的数据库设计思想，列图详述了地理数据在关系型数据库中的存储结构，讨论了异构数据源通用访问接口的实现方案。

We present the research status and the problems to be resolved about network resource allocation and quality of service.

现在，越来越多的具有异构需求的用户访问Internet，因此有效的服务提供和优化的资源分配，是非常复杂且具有挑战性的任务。

In the 5th chapter, the application of Multi-Agent technology in Concurrent Engineering is studied. With the shaft strength and rigidness analyzing agent and gear strength analyzing agent as examples, an agent model is studied and provided. A federated multi-agent infrastructure based on product assembly model and multiple analyzing agents is suggested. By this, cooperation under distributed and heterogeneous environment and efficient information integration among mechanical geometry product modeling system, assembly modeling system and analyzing system can be realized.

第五章研究了多代理（Multi-Agent）技术在并行工程中的应用，以转轴强度与刚度验算代理和齿轮强度验算代理为例子分析了代理的模型，研究并提出了一种基于产品装配模型和多分析计算Agent的联邦制体系结构，该体系结构能够支持异构分布环境下的协同工作，能够实现机械产品几何造型系统、装配建模系统、分析设计系统之间的有效集成。

According to the fundamental characteristics of radio resources management, based on systematic analysis and demonstration of existing RRM algorithms, this paper analyzes the following several key technologies and theoretical problems in detail.

用无线资源管理(RRM-Radio Resource Management)的各种方法对复杂的无线物理信道、网络资源进行合理配置，完善异构网络的兼容性及保障不同特性业务的传输质量等方面就成为一个重要的研究课题。

In this paper, the embedded technology, network and communication technology and theory of intelligence and technology are used to do research on manufacturing equipment in manufacturing systems to adapt to the networked digital environment, in order to achieve manufacturing equipment\'s capacities of self-adapting to the manufacturing environment, self-controlling its action on the processing, and integrating with heterogeneous manufacturing equipment.

本文利用嵌入式技术、网络与通信技术和智能理论与技术，针对制造系统底层制造装备的自律控制理论与关键技术展开研究，以实现制造装备具有对制造环境的自主适应能力、对加工行为的自律控制能力、与异构制造设备的集成能力。

For lactic acid has one asymmetric carbon atom, the mechanical, physical and biological properties of PLA are related to the stereochemistry of lactic acids.

合成聚乳酸的初始物质―乳酸是有手性的分子，使得聚乳酸的机械和物理性能以及生物学性质与乳酸单体的立体异构性有关。

The optical activity of a stereoisomer is expressed quantitatively by its optical rotation, The specific rotation 〖α〗D25C of an optically active compound is defined thus

立体异构体的光学活性是以旋光度定量表示的，光学活性物质的比旋光度〖α〗D25C是这样定义的

Therefore, the metabolic pathway from soybean oil to erythromycin was presumed as follows: soybean oil is metabolized into TCA pathway to generate much α ketoglutaric acid and then generate succinyl CoA by strengthening TCA pathway, and the methylmalonyl CoA is formed from succinyl CoA by isomerization. Finally, methylmalonyl CoA can be used as the precursor for the biosynthesis of erythromycin.

推测豆油经过红色糖多孢菌代谢后进入红霉素合成的一条可能途径：豆油经过代谢后进入TCA循环，并强化了TCA循环的通量，产生了大量α酮戊二酸，再生成琥珀酰CoA，琥珀酰CoA在甲基丙二酰CoA异构酶的作用下生成甲基丙二酰CoA作为红霉素合成的前体。

Manini, MD, from Harvard Medical School in Boston, Massachusetts, and colleagues."Cardiovascular adverse effects can occur, including hypertension, arrhythmias, prolongation of the QT interval, and angina pectoris. Dangers of over-the-counter sympathomimetic use are illustrated by the recent ban on dietary supplements containing ephedrine alkaloids by the US Food and Drug Administration because of increased risk of sudden death, acute myocardial infarction, and stroke."

Manini医师表示，Pseudoephedrine是ephedrine的镜面异构物，会产生肾上腺素的综合促效作用，一般被用来作为解充血剂；此药的副作用包含高血压、心律不整、心电图QT波间距延长及心绞痛等；最近，美国食品药物检验局规定添加剂不得含ephedrine生物碱，由此可看出仿交感神经作用的药物所潜藏的危险；这些危险包含猝死、急性心肌梗塞及中风等。

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。