查询词典 DDE

As long as the system of first order polynomial DDEs in (1+1)-dimensions is given, no matter whether a single equation or the coupled equation, CLawDDEs can automatically output the scaling symmetries of the variables and a series of possible polynomial conservation laws for different rank.

只要输入多项式形式的等秩DDE，无论是单个方程还是耦合方程组，CLawDDEs都能自动确定变量的标度变换特性和不同秩的多项式守恒律。

It is poisonous to other vertebrates, especially fish, and is stored in the fatty tissue of animals as sublethal amounts of the less toxic DDE.

对其他的脊椎动物，特别是鱼类具有毒性，会以毒性较低之二氯二苯化合物型态积存在动物的脂肪组织中。

The "divide and conquer" strategy is used to improve the key steps of the undetermined coefficient algorithm for constructing polynomial conservation laws of nonlinear DDEs, so the calculation complexity problem caused by the dramatic increase of redundancy is solved. Furthermore, Wu\'s elimination method is applied to solve the obtained nonlinear algebraic equations thus to get a more efficient algebraic algorithm.

本文从微分方程的标度变换出发，利用"分治"策略改进了构造非线性DDE守恒律待定系数算法中的关键步骤，有效解决了因冗余项急剧增加引起的中间计算过程膨胀问题，并将吴消元法应用到非线性代数方程组的求解上，从而给出了一个更高效的代数算法。

However, these solutions are disadvantageous in cost and complexity of technology.In this thesis, SNMP innovatively applied into the management of Lon Works control network, by using Ethernet, Lon Works control network is integrated exoterically and seamlessly with information network in enterprises, distilling network information from LonWorks based on DDE technology, realizing the control and management to LonWorks based on SNMP.

本文创新地将SNMP协议引入到LonWorks控制网络的管理中，通过以太网将LonWorks控制网络与企业信息网络进行开放的、无缝的集成，采用动态数据交换技术完成了LonWorks现场信息的提取，利用SNMP协议实现了LonWorks现场网络的监控和管理。

To extend the database for K_ at sub-zero temperatures,K_-values for phenanthrene,fluoranthene,α-hexachlorocyclohexane,γ-hexachlorocyclohexane,trans-chlordane,o,p\'-DDE,cis-chlordane and trans-nonachlor were also determined by the same method as PCBs over -30～30℃.

与PCBs的结果相同，在温度≥0℃和温度≤0℃时，这些物质的log K_与绝对温度的倒数均呈线性关系。

Ten organochlorine pesticides including alpha, beta, gamma and delta isomers of hexachlorocyclohexane, pp' DDE, pp' DDT,op' DDT,pp' DDT,pentachloronitrobenzene and hexachlorobenzene were determined respectively.

我国于1983年停止生产HCH和DDT，但1990和1992年中国总膳食研究表明，各类食品中还有一定量的HCH及DDT的残留，且动物性食品的残留高

As an initial attempt to set up a "Freshwater Mussel Watching" system,swan mussels were collected from Wuli Lake of the Taihu Lake in March 2003 for analysis by gas chromatography of dichlorodiphenyltrichloroethanes(p,p′-DDE,o,p′-DDT,p,p′-DDD,p,p′-DDT),and α-,β-,γ-,δ-hexachlorocyclohexane isomers in soft tissues.

作为建立淡水&贝类观察&体系的初步尝试，选定2003年3月采自太湖五里湖水域的背角无齿蚌为研究对象，测定其体内滴滴涕和六六六含量。

Experimental results indicated that the contaminants generally existed in mussel, such as α-HCH,β-HCH,γ-HCH,δ-HCH, o·p-DDT, p·p-DDT, p·p-DDD, were degraded completely under the above conditions, whereas DDE, aldrin and dieldrin were partly degraded. No detectable degradation of PCB 1242 and PCB 1248 were observed. Thus the conventional preparation of the contaminants using the columns packed with Florisil or SiO〓 could be left out.

测定贻贝中的PCBs时，以KOH甲醇溶液处理试样，在微波能作用下，试样的微波皂化与有机氯农药的微波碱解同时进行；测定土壤和沉积物中的PCBs时，以KOH甲醇溶液处理试样，在微波能作用下，PCBs的微波萃取与有机氯农药的微波碱解同时进行，1M KOH甲醇溶液对PCBs的微波萃取能力与纯甲醇溶剂相当。

The one was to conduct field studies and empirical measurements in various environmental media of the normal and the workplace fields and nearby residents to explore the concentrations and distribution for those selected chemicals, including mercury, tributyltin oxide, triphenyltin hydroside, dieldrin, DDT (the derivatives DDD and DDE is included), endrin, heptachlor, aldrin, lindane, hexachlorobenzene, benzene and epichlorohydrin.

二、完成环氧氯丙烷及苯毒性化学物质，十二厂次之运作工厂厂内及周界环境流布（依物质特性选定检测之介质及相关暴露族群）共360个检测样品之实地量测调查资料，以了解、研判其在厂内之释放来源，以及运作工厂周界可能存在之环境介质及相关暴露族群之暴露浓度含量分布，并针对相关暴露族群进行不同途径之暴露推估。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。