查询词典 density of population

In 1961 they published the first carrier will be injected into the semiconductor PN junction to achieve the "injection laser" exposition and demonstration in the tunnel diodes as high as in Jane and the PN junction to achieve population inversion (which is Produced by stimulated emission of the necessary conditions for) the possibility, but also that active high-density areas around the most active carrier of the border areas on both sides of the refractive index of a difference, creating optical waveguide effect.

他们又于1961年最先公开发表将载流子注入半导体PN结以实现"注入激光器"的论述，并论证了在如隧道二极管中那样高度简并的PN结中实现粒子数反转(这是产生受激发射的必要条件)的可能性，而且还认为有源区周围高密度的多数载流子造成有源区边界两边的折射率有一差值，因而产生光波导效应。

Natality, mortality and population The nature of competition (I1) growth (H2) The nature of predation (J1) Density and density

出生率，死亡率和种群增长(H2)竞争的性质(I1)密度和密度制约(H3)捕食的性质(J1)种群动态——波动，周期和混沌H4

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。

The survival curve of the population was between Deevey Ⅱ and Deevey Ⅲ with two peaks of mortality rate. Four functions (survival rate, mortality rate, mortality density function, hazard rate) all indicated that the population increased at the early stage and kept stable at the late stage.

其存活曲线介于Deevey-Ⅱ型和Deevey-Ⅲ型之间，呈现2个死亡高峰。4个生存函数值（生存率、积累死亡率、死亡密度、危险率）均说明该种群具有前期增长、后期稳定的特点。

The population density was different at various altitudes, and among them, the biggest one was the population C. The life tables showed that the death rates at age class Ⅱ,Ⅲ,Ⅳ were higher, so the death rates decreased with the diameters class increasing, after age class Ⅳ or Ⅴ, however, the death rates increased again. The expected life was longer before class Ⅳ, and decreased gradually with the age increasing. The survival curves of different populations was close to Deevey Ⅲ type. The dynamics of C.

不同海拔的种群密度存在差异，其中C种群密度最大；静态生命表显示，种群在Ⅰ、Ⅱ径级时死亡率较高，随着年龄增加，死亡率逐渐降低，但到了Ⅳ、Ⅴ径级，由于生理衰老死亡率又上升；种群期望寿命在Ⅱ、Ⅲ、Ⅳ径级较高，随着年龄增加，期望寿命逐渐下降；不同海拔的米槠种群的存活曲线均接近于Deevey Ⅲ型。

Ramet population density, ratio of root to shoot and ramet population spatial pattern of Fragaria vesca varied along the elevation gradient in the transitional zone between Qinghai-Tibet plateau and Sichuan basin.

本文通过两个野外调查实验，研究在不同光照条件下聚花过路黄的克隆构型以及分株种群特征和野草莓分株种群特征随海拔梯度的变化。

In each subperiod,the static rank variance and the static density variance of the population are defined,thus the DMOPs is transformed into several bi-objective static optimization problems by using the static rank variance and the static density variance.

然后把动态多目标优化问题近似地转化成了若干个两个目标的静态优化问题。在给出的一种能自动检测环境变化的应答算子下，提出了一种动态多目标进化算法，同时证明了算法的收敛性。

The results indicated that paraquat had a significant effect on soil microflora in thirty days. Paraquat of 0.05~5mg/kg inhibited the growth of funguses, but stimulated the growth of the population of cellulose utilizing microorganism and nitrifying bacteria. The low-density paraquat stimulated the growth of bacteria and actinomyces, but high-density paraquat inhibited their growth.

结果表明，施用百草枯对土壤微生物有明显的影响。0.05~5mg/kg的百草枯在施药后30d内，真菌种群严重被抑制；硝化细菌种群和纤维素分解菌种群均呈刺激效应；低浓度的百草枯刺激土壤细菌和放线菌种群的生长，而高浓度的百草枯则抑制其生长。

No significant seasonal variation was observed in moving distance and moving frequency of female plateau pikas in low density population, whereas moving distance and frequency varied significantly for males. Significant seasonal variations were shown in both females and males in high density populations.

低密度种群内，雄性高原鼠兔的地面移动距离和频次均呈显著的季节性差异，而雌性高原鼠兔的差异不显著；高密度种群内，雌、雄个体的地面移动距离和频次都具有显著的季节性差异。

Area of 12 square kilometers, household residents in 8334, population 27,686, and the population density 2037 people per square kilometer.

面积12平方公里，户籍居民8334户、人口27686人，人口密度平均每平方公里2037人。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了