population decrease

The survival curve indicated that the population decrease uses mainly from egg to lst and 2nd instar.

从种群存活曲线分析得出，影响种群增长的关键虫期为卵至1、2龄幼虫期；

Population double time decrease rapid with temperature rise in the section of low temperature, it postpone when temperature is 34 ℃, average generation time increase with temperature assume exponent.

种群加倍时间随温度升高在低温区急剧缩短，但到34℃时有所延长；平均世代时间随温度升高呈指数缩短。

The population began to decrease.

人口开始减少.

Since the 1960s, the rapid expansion of the world population and dramatic decrease in cultivated land raised concerns about a probable global food crisis.

自上世纪60年代以来，世界人口急剧增长而耕地面积日益缩减，粮食安全问题已成为世界和平和发展的巨大挑战。

Meanwhile, the Chinese working population will start to decrease from 2015.

与此同时，中国劳动人口将从2015年起开始下降。

And the development of ecological agriculture should rely on agricultural production, the decrease of population bearing in unit farmland is key factor to raise productivity and increase farmer'income.

农村生态建设要立足农业，通过减少土地的人口承载量，提高劳动生产率和增加农民收入。

While the population size exceed presetting threshold, the population size decrease to original state. Then, to solve discrete optimization problem, PSO algorithm is modified to discrete one.

当种群规模超过预先设置好的阈值时，将种群规模降为初始状态。（2）为求解聚类问题，将PSO算法修改为离散化PSO。

Because of the humans hunting and the destruction of habitants, the population of Ursidae species decrease sharply and all species of Ursidae have been listed as the national endangered. protected species.

由于人为的捕杀和物种栖息地的破坏，熊科动物的数量急剧减少，其物种均被列为国家级濒危保护物种。

The development of the economy inevitably represents the city of the development, then the agriculture population tends in the decrease, the village translates into a city.

经济的发展，必然表现在城市化的发展上。.即农业人口趋于减少，乡镇转化为城市。

With the increase of population and the decrease of arable land, the four contradictions are sharping, such as resources, population, grain and environment.

但是，人多地少，人口不断增加，耕地日趋减少，所面临的资源、人口、粮食、环境的四大矛盾，向我们提出了严重挑战。

The results show that under otherwise equal conditions the absolute values of edge effect in plant population progressively decrease as the horizontal edge distance progressively increase.

结果表明：在同一条件下，植物群体边缘效应的绝对值随水平边距递增而递减。

Sprouting is also the type of regeneration but is of weak capacity, with the net reproduction rate R o < 1.0, intrinsic increase rate r m < 0, which indicates the population will decrease.

也可通过萌蘖繁殖进行天然更新，但更新能力较弱，种群净生殖率Ro＜1.0，内禀增长能力rm＜0，种群数量将递减。

The analysis of two years results that competition between intercropping crops lead to yield of intercropping population decrease.

综合2年试验结果，间作作物间的相互竞争导致间作群体产量降低。

The contradiction between the continuous increase of world population and the rapid decrease of farming land and water resources is calling forth a new green revolution marked with modern genetic engineering technology.

世界人口的进一步增加和耕地、水资源不断减少所导致的未来巨大的食物供需矛盾，正引发以基因工程为核心的第二次绿色革命。

In Henan, economic respect basically has the following three aspects of the impact of: one: Population decrease; Two, farmland destroyed; three, rising prices.

就河南地区而言，经济方面主要有以下三方面的影响：一、人口伤亡；二、农业生产遭到破坏；三、物价上涨。

The hybrid algorithm can adopt lesser population, and decrease calculation scale, thus improves local searching abilities and robustness.

该混合算法，在继承粒子群优化算法原有优点的同时，不但可减少计算规模，且有效地增强了粒子群优化算法的局部搜索能力，提高了算法的鲁棒性能。

There has been a progressive decrease in population every year in this city.

这个城市的人口在逐年递减.

The simulation results show that the population distribution of 2010 will become well-regulated. People will concentrate between the fourth ring and the fifth ring. In the city zone population will decrease except the Dongcheng district.

通过仿真可以看到2010年城市人口的分布更加有规律性，人口集中在四环到五环之间，城区中除东城区人口保持一定的数量，其他三区人口都有所衰减。

To solve the contradiction between the increase of population and the decrease of arable land, the fishery resources in both sea waters and inland waters should be made the best use of, so that there will be enough food available.

为解决我国人口增加与耕地减少的矛盾，如何充分利用我国海洋与内陆水域渔业资源，保障食物的有效供给。

Natural decrease in Shanghai population and socioeconomic development

上海人口自然变动负增长与社会经济发展

Conclusion: Interventions in high-risk population can decrease the infection rate of chlamydia.

结论：通过对高危人群进行干预，可降低衣原体在女性生殖系统的感染率。

Simulation experiments on the compensation of cotton population to the decrease of plant number caused by black cutworm

小地老虎为害棉苗缺株产量损失及棉株群体补偿力模拟试验

There are many unfavorable effects on the sustainable development of social economy because of the aging of population, such as a decline in the proportion of age for labor force in the population; a decrease in the labor resources; the aging of population of labor force;

尽管人口老龄化给社会经济的持续发展带来了劳动年龄人口比重下降，劳动力资源减少，劳动年龄人口老化；

An important agricultural region in different regions of the population increase or decrease each period show very different form of exhaust.

一个重农区的不同地区每个时期人口的增减表现出竭然不同的形式。

With the increase of population and decrease of petroleum output in Daqing area, the change of land use is more notable and the intensity of land use is more strengthened, which lead to the land deterioration, soil and water pollution, bio-diversity decreased.

随着人口增长和石油产量的逐年降低，大庆市对土地利用模式的改变及对土地利用强度的加大，导致土地退化，土壤污染，水污染加重和生物多样性降低等后果；

In the screening of HPV infection, we can select the high-risk population so as to decrease the cost of screening. 2.

在HPV感染的的普查当中可以有重点的选择高危人群，这样更加有针对性，从而大大降低普查成本。

The result indicates the inertia weight has little problem dependence, and with the increase of the population its value should decrease properly. The selection of inertia weight has more freedom in the local version of PSO.

结果表明，惯性权重的问题依赖性较小，随着种群的增大，其取值应适当减小，局部版本下，惯性权重的选择具有更大的自由度。

Fermenting the straw to produce feed-protein, can avoid the waste of renewable resources, can remit the problem of the increase of population and the decrease of land and the shortage of feed-protein.

利用微生物发酵农作物秸秆生产饲料蛋白不仅可以避免可再生资源的浪费还能够缓解随人口增加和土地减少形成的人畜争粮、蛋白饲料不足等问题。