查询词典 vector density

Maxwell's equations group in fact was already found in the basic experimental laws of electromagnetic phenomena, as well as a single magnetic pole does not exist on the facts and the integrated displacement current assumptions, using an international system of units, these equations can be written as: DivDW =ρ or DW =ρ(1) kiDivBq = 0 or Bq = 0 (2) kiCurlEBq =- Zt or × EqkZ =- BqZt (3) ZCurlHDWDW = jE Zt, or × HW = jE Zkt (4) Z-type in the Curl, and Div were vector operator curl and divergence, Micro-k points for the Hamiltonian operator, in the rectangular coordinate system,= iZZEkx jEy kqz, iE, jE, kq along Zx, y, z-axis unit vector, a vector for any AW are × AW = CurlAW, kAW = DivAW; DW for the electric displacement, Bq for the magnetic induction intensity, Eq, and HW, respectively i field and electric field strength, jY for the conduction current density,ρ the charge density for free.

麦克斯韦方程组实际上是当时已发现的电磁现象的基本实验定律以及单个磁极不存在的事实和位移电流假设的综合，采用国际单位制，这些方程式可写成：DivDW＝ρ或DW＝ρ（1）kiDivBq＝0或Bq＝0（2）kiCurlEBq＝－Zt或×EqkZ＝－BqZt（3）ZCurlHDWDW＝jE＋Zt或×HW＝jE＋Zkt（4）Z式中Curl和Div分别为矢量算符旋度和散度，为哈密顿微k分算符，在直角坐标系中，＝iZZEkx＋jEy＋kqz，iE，jE，kq是沿Zx、y、z轴的单位矢量，对任一矢量AW有×AW＝CurlAW，kAW＝DivAW；DW为电位移，Bq为磁感应强度，Eq和HW分别为电i场和磁场强度，jY为传导电流密度，ρ为自由电荷密度。

Sect III : We use function of ERDAS8.5 which distill environmental factors from remote sensing image, and explore the relation between vector density and normalized difference vegetation index.

在指标替换中，我们运用了Co七opng，分析表明：媒介分布与发病地区呈现高度一致性，即媒介密度高的地区发病也高，且与NDVI有较强的一致性。

Results The regular monitoring results of vector density showed that the dendity were basically controlled below the level of insufficient damages.

结果 通过对媒介生物的定期监测，将病媒生物密度基本控制在不足为害的水平。

Objective To learn the influence of the earthquake in Wenchuan on vectors and vector borne disease, grasp timely the vector species and its density dynamics, and provide a reliable basis for the risk assessment of vector borne disease.

目的 了解汶川特大地震对病媒生物及相关传染病产生的影响，及时掌握地震灾区病媒生物种类、密度动态，为病媒生物性疾病风险评估提供可靠依据。

The transmission coefficients of small circular aperture diffraction were calculated respectively by applying the energy flux density vector and the power flux density vector,and some new results were obtained.

应用能流密度矢量S和功率流密度矢量J，分别计算了微小孔非傍轴衍射的透射系数，得到了一些新的结论。

The internet E-mail attachment function is enough to ful fill vector density data exchange between the surveillant site and proposal center.

同时表明，使用电子邮件附件方式足以解决监测点与监测数据处理中心的监测数据交换问题，且便于基层推广使用。

Methods The density of vector was monitored comprehensively and systematically in the Olympic core area,Olympic venues and outside of Olympic venues.Large-scale vector control activities were carried out in the area within 2 km and the whole city,with Olympic venues as the key places of vector control.

对奥运核心区、全市奥运场馆、场馆外围进行全面系统的病媒生物密度监测，以奥运场馆为重点，对周边2km及全市范围开展大规模的病媒生物控制活动。

Vector ; Density monitoring ; Population dynamic

病媒生物；密度监测；种群动态

Methods:The programme language was used to establish the vector density surveillant data management and submit system.The data transmission function between surveillant site and the center was achieved by internet E-mail attachment sending and data interface of the system.

编制四害密度监测数据库及其数据处理、管理程序，以电子邮件附件方式及其数据接口实现监测点与监测数据处理中心之间的数据交换传输。

Methods The risk of vector-borne diseases occurrence,nuisance and adverse impact caused by vectors was advanced by analyzing the species,density and the damage of vectors in recent years in Beijing.Control strategies were established according to the monitoring results of the vector population density,resistance and the pathogens in Olympic venues and in urban areas during 2005-2008,as well as the selection of effective control method and management measures.Results The risk of vector-borne diseases occurrence and nuisance caused by vectors existed in Beijing.

通过对近年来北京市病媒生物种类、密度消长特点以及危害程度的分析，提出奥运会期间媒介生物性传染病发生的危险性以及病媒生物可能造成的骚扰与不利影响；根据2005-2008年奥运会场馆及城区病媒生物密度、病原与抗药性监测结果，以及安全、环保、有效控制和管理措施的筛选，制定奥运会期间病媒生物控制保障策略。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。