查询词典 density of population

Natality, mortality and population The nature of competition (I1) growth (H2) The nature of predation (J1) Density and densityPopulation dynamics – fluctuations, cycles and chaos H4

对于生长率无法预测的物种，根据大小分类可能更有意义。

The performance and mechanism of corrosion inhibitions of POCA were studied bymethods such as weight-loss, electrochemistry, EDS, XPS and quantum chemistry. It isfound that POCA is cathodic corrosion inhibitor, having synergistic effect with HEDP andZn~(2+). The P and O atoms of phosphono have important electron density contribution toHOMO orbital and the electron gross orbital population is bigger than 1, so it is easy toform absorbing location between phosphono and metal resulting in good corrosioninhibition on mild steel.

通过利用失重法、电化学方法、扫描电镜、X光电子能谱、X-射线能谱和量子化学方法研究膦酰基羧酸的缓蚀性能及其机理，发现POCA是一种阴极型缓蚀剂，与HEDP、Zn~(2+)具有优良的协同增效作用；POCA分子中的膦酰基基团的P原子和O原子对HOMO轨道电荷密度贡献较大，且其轨道电子布居数均大于1，因此比较容易通过膦基与金属形成吸附位而对碳钢具有良好的缓蚀作用；对铜合金具有一定的腐蚀作用，但腐蚀作用比HEDP等有机膦药剂要小得多，同时与BTA具有优良的相容性，添加1mg／L的BTA则可以有效地防止铜合金的腐蚀。

Therefore, to subsample"s observation of continuous random sample parent population, if we can"t get its material function easily, or we dont know its density function, we can use this way to approximate its distribution function. And these methods can achieve good approximation effect.

对连续型随机样本母体中的简单随机子样的观察值，在不易得到其具体分布或不知道其密度函数的情况下，可用此方法来近似求出其分布函数并可达到很好的逼近效果。

Simulation models have shown that microscale patchiness of prey density can greatly enhance predator population

微尺度 patchiness 的猎物密度可以极大地提高捕食种群显示仿真模型

Have a lot of advantage , former predestined relationship of Huizhou City advantage , Huizhou City is located in peart triangle Northeast , adjacent HongKong , fields such as Shenzhen , Dongguan , geographic location are very advantageous;Secondly , Huizhou City is a minimal city of pearl triangle population density , both land resources and water resource enrich comparatively;Huizhou City already forms the body traffic network being composed of deepwater port , express highway , Beijing-Jiulong Raiway , airport etc.once again , at present , logistics advantage is very obvious;Now available Huizhou City electronic information estate , petroleum and chemical estate etc.develops vigorously finally , supporting advantage having already formed fairly good estate.

惠州有许多优势，先是地缘优势，惠州地处一反常态一角东北部，毗邻香港、深圳、东莞等地，地理位置十分优越；其次，惠州是珠三角人口密度最不的城市，土地资源和水资源都比较丰富；再次，目前惠州市已形成由深水港、高速公路、京九铁路、航空港等构成的立体交通网络，物流优势很明显；最后，惠州现有的电子信息产业、石化产业等蓬勃发展，已经形成了较好的产业配套优势。

The governments of province, autonomous region and municipality directly under the Center Government should decide cultivation-prohibited slope gradient below 25°on the basis of local terrain, soil, plowland, population density, etc.

坡地资源作为我国土地资源的重要组成部分，其过度开发和不合理利用造成了大范围的土地退化和区域环境破坏，严重制约了我国资源——环境——经济系统的持续发展。

We show that a supercritical Hopf bifurcation will occur under some conditions by using the density dependent rate in immature prey population as bifurcation parameter. Sufficient conditions which guarantee the uniform persistence and global stability of boundary equilibrium are also obtained.

我们以幼年食饵个体之间的密度制约率作为分支变量得到在一定条件下将出现超临界Hopf分支，并得到了系统一致持续生存和边界平衡点全局渐近稳定的充分条件。

The experiments with water as only limiting factor was designed to study the dynamics of size inequality in spring wheat ( Triticum aestivum L.)populations and its theoretical basis.Of the three densitywheat populations,the skew of weight distribution of wheat plants increase with time,and the increase rate is the highest in high density population.

在黄土高原半干旱生态条件下设置了低、中、高3个密度梯度的以水为限制因子的实验，各密度种群个体重量分布偏倚度随时间的延续而增大，增大的幅度随密度增高而上升。

Then draws the conclusion:The Xi'an commercial real estate change of price's influencing factor is in turn commercial business completes the investment cost,the social fixed assets investment,the urbanized level,the resident consumption price index,the township dwellers according to influence size sorting with the room to be possible to control the income,the average per person family consumption gross charge,the vacant area,the Engel's coefficient,the population density.

进而得出结论：西安市商业地产价格变化的影响因素按影响力大小排序依次是商业营业用房完成投资额、社会固定资产投资、城市化水平、居民消费价格指数、城镇居民可支配收入、人均家庭消费性总支出、空置面积、恩格尔系数、人口密度。

Several factors such as population density, price of product, con-strained conditions and the development stage of plant which effect the decision making were discussed.

讨论了不同虫口密度，不同的市场价格，不同的约束条件以及水稻不同生长时期对决策的影响。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。