查询词典 population

Tenth. A series of mathematical model of genetic mechanism of common population have been established,they are mathematical description of genetic mechanism of common population, so the population that the population genetics researching have extended from panmixia population, inbreeding population,selfing population to common population. It will start the new research territory of population genetics and promote its development.

本文建立了普通群体遗传机制的一系列数学模型，这是对普通群体遗传机制的数学描述，它使群体遗传学所研究的群体由随机交配群体、近亲交配群体、自交群体扩展到普通群体。

The results showed that Liquidamba formosana, Quercus acutissima, and Quercus fabri populations had the dominant positions in the forest community of Purple Mountain Area of Nanjing. During the growth process, the mortality of L. formosana, Q. acutissima, and Q. fabri were higher in low age. After entering into the middle-age stage, the upper space was occupied by oak and L. formosana population all died. The mortality of Q. acutissima and Q. fabri populations were increased with the increasing of diameter class. L. formosana population in the Purple Mountain Area of Nanjing belonged to be the typical growing population and Q. acutissima population was a decreasing population. Q. fabri population belonged to be the growing population on the whole, but the diameter class in middle parts was incomplete and the population was difficult to be renewed. Among the studied quadrate, only one dominant population showed an aggregated distribution and other dominant species showed the random distribution. Either, all the dominant species in all the quadrates presented random distribution.

结果表明，枫香种群、麻栎种群和白栎种群在南京紫金山地区森林群落中占有优势地位；枫香种群、麻栎种群和白栎种群在其生长过程中，在低龄时期，死亡率都较高，进入中龄期后，由于上层空间都被栎木占据，枫香种群全部死亡，而麻栎种群和白栎种群的死亡率则随着径级的增大而增大；南京紫金山地区枫香种群属于典型的增长型种群，麻栎种群属于衰退型种群，白栎种群总体上属于增长型群落，但中间径级不完整，种群更新较为困难；在所研究的每一个样方中，一般只有一个优势物种呈聚集分布，而其他优势物种呈随机分布，或样方中所有优势物种都呈随机分布。

From late 1970s,Chinese technological staff began to do deep research on the issue of population control and achieved a lot of researching results at three levels: population database , technology and soft ware of population analysis, the informational system of population management, the surporting system of population strategy and population forecast and software are at practical research level; the system control theory of nonlinear population distribution parameter in this article is of basic research.

从七十年代末，我国科学技术工作者开始对我国人口控制问题进行了深入的研究，分别从三个层面取得了许多研究成果：人口数据库、人口分析技术和软件、人口管理信息系统、人口决策支持系统、人口预测和软件等，属于应用研究层面；人口系统论和人口控制论等属于应用基础研究层面；而本文的非线性人口分布参数系统控制理论，则属于基础研究。

Objective:to study the level of total anaerobic population, total aerobic population, four kinds of anaerobes and two kinds of aerobes in excrement of sufferers of varies kinds of irritable bowel syndrome and that of normal persons.methods:excrement specimens from 52 ibs sufferers of different kinds and that of 18 normal volunteers were collected, and the level of four kinds of anaerobes and two kinds of aerobes were quantified.results:the level of total anaerobic population and total aerobic population of excrement specimens of three kinds of ibs sufferers were different significantly, particularly the level of bifidobacterium and cillobacterium(p.01);the level of bacteroid population was higher significantly in diarrhea-predominant and mixed type of ibs sufferers (p.01);the level of enterococcus population was higher significantly in diarrhea-predominant ibs sufferers(p.05);among the aerobes, the number of escherichia coli and staphylococcus aureus colonies were increased by different level(p.01or0.05) in the ibs suffers, in particular, the number of escherichia coli colonies in diarrhea-predominant ibs sufferers increased most significantly.conclusion:sufferers of different types of ibs have different intestinal tract dysbacteria phenotypes.

目的：了解不同类型肠易激综合征患者和健康状况正常的人粪便中总厌氧菌群和需氧菌群及常见的4种厌氧菌和2种需氧菌的含量情况。方法：对临床上确诊的各类型ibs患者共52例和18例健康状况正常的志愿者，采集粪便标本进行总厌氧菌群和需氧菌群及常见的4种厌氧菌和2种需氧菌定量检测。

Their low wages has expedited the development of these enterprises. To date, the ratio of the external employed population in the total employed population has been on the rise. And to some extend, it increased the urbanization level of Quanzhou, reducing the spatial dispersion of its in-situ urbanization. Secondly, as a source of the in-situ urbanized population in Quanzhou, up to now, the proportion of the external floating population in the total population and urban population has shown a rising trend.

迄今外来就业人口在总就业人口中的比例呈上升趋势，并在一定程度上提高了泉州的城市化水平，削弱了其就地城镇化的空间分散性；②作为泉州就地城镇化的人口来源，迄今外来流动人口在总人口和城镇人口中的比例都呈上升趋势，他们在泉州各县市的分布由于乡镇企业的发展水平差异而具有一定的规律性。

For more exact modeling population distribution condition and more expressly reflecting population spatial pattern in urban region,with the fifth census data of Shenyang City,in this paper we spatialize population data by using grid calculating,model population distribution by using Geo\|statistics,identify population pattern by using DEM models and analyze characters of population distribution.

为准确地模拟城市人口分布，清晰地反映城市人口分布格局，本文利用沈阳市第五次人口普查资料，采用网格计算方法空间化人口数据、地统计学的空间插值方法模拟人口分布。

It was found that 0.25%o potassium sorbate produced a positive inhibition against short G+ spore bacillus with a concentration less than 5xl04cfu/ml. A concentration less than %o potassium sorbate hardly exerted a complete control towards short G- plump bacillus having a population density of 5x104cfu/ml. It was proved that use of l% potassium sorbute never controlled the growth of G+ coccus, G~ spirilla and enterobacter with a population density of 104cfu/ml. 1mmol EDTA completely controlled the growth of G+ short spore bacillus and G+ coccus whose cell density was 5xl04cfu/ml. A level of lmmol EDTA showed a limited inhibition against the growth of G- spirilla with a population density of 105 cfu/ml. However, a level of 10mmol EDTA completely controlled the growth of the G- spiral bacteria having a population density of 105cfu/ml. lOmmol EDTA produced a very significant control towards the growth of G"" plump short bacillus with 105cfu/ml. 20mmol EDTA showed a remarkable inhibition against the enterobacter with a population density of 105cfu/ml. Different concentrations of nisin including 25mg/mL, 50mg/mL, 75mg/mL and 100mg/mL were used as bio-preservative to examine its effects against the growth of all strains leading to the spoilage of fresh mutton meat. It was seen that there was a big difference in nisin's concentrations in inhibiting the spoiling bacteria. Generally speaking, as more as 75mg/mL of nisin significantly inhibited the growth of G+ short spore bacillus, G-plump short bacillus, enterobacter, G'spiral bacteria and G+ coccus having a population density of 105cfu/ml.

分别运用山梨酸钾、EDTA和Nisin对7种主要引起羊肉腐败的微生物进行了抑菌实验，结果显示，0.25‰以上山梨酸钾能够有效抑制5×10~4 cfu／mL以下的革兰氏阳性短芽孢杆菌的生长；1‰以下的山梨酸钾不能完全抑制5×10~4 cfu／mL革兰氏阴性粗短杆菌的生长，对10~4 cfu／mL革兰氏阳性球菌菌株、革兰氏阴性螺旋菌菌株和肠杆菌菌株抑制效果不太明显。1mmoL EDTA能完全抑制住小于10~5 cfu／mL革兰氏阳性短芽孢杆菌菌株、革兰氏阳性球菌菌株的生长，能明显的抑制10~5 cfu／mL的革兰氏阴性粗短杆菌菌株生长，对10~5 cfu／mL的革兰氏阴性螺旋菌菌株有一定的抑制作用。10mmoL EDTA能完全抑制住10~5 cfu／mL革兰氏阴性螺旋菌菌株的生长；能明显抑制10~5 cfu／mL的革兰氏阴性粗短杆菌菌株的生长，而20 mmoL EDTA能很明显抑制10~5 cfu／mL肠杆菌菌株的生长。25mg／mL、50 mg／mL、75 mg／mL和100 mg／mL的Nisin几乎对所有引起羊肉的腐败菌有抑制作用，但抑制程度不同，抑菌活性有一定的变化。

Impact of population growth on resources environment: population explosion's pressure to land resource, population growth's pressure to biological resources, population explosion's pressure to water resources, population inflation's pressure to energy.

人口增长对资源环境的影响：人口爆炸对土地资源的压力，人口增长对生物资源的压力，人口爆炸对水资源的压力，人口膨胀对能源的压力

The paper consists of three parts. First, we give the calculation for every order central moment for the Logistic population, mean vector and covariance matrix of the order statistic of random sample from the Logistic population, and means of several special functions for the order statistic of random sample from the Logistic population. Secondly, we discuss the parameter estimation for the Logistic population. Finally, we solve the question about the goodness-of -fit test for the Logistic population.

研究的主要内容分三部分：第一部分是关于Logistic总体各阶中心矩、样本次序统计量期望向量与协方差阵及若干个特殊的样本次序统计量函数期望的计算问题；第二部分是关于Logistic总体分布参数的估计问题；第三部分是关于Logistic总体的拟合优度检验问题。

Beijing Statistical Bureau, the National Bureau of Statistics announced in Beijing survey data Corps area is the use of per capita housing, Ministry of Construction announced that the per capita housing area, and statistics department's forecast of 25.9 square metres per capita housing area is 6.96 square metres of construction gaps; Second, the use of different population data, the use of population statistics department for the resident population of the district towns built for the 1115 million people, and the Ministry of Construction of the population is the use of non-agricultural household registration population to 880.2 million.

北京市统计局、国家统计局北京调查总队公布的数据是人均住房使用面积，建设部公布的是人均住房建筑面积，与统计部门测算的人均住房建筑面积25.9平方米仍有6.96平方米的差距；二是使用的人口数据不同，统计部门使用的人口为城镇建成区的常住人口，为1115万人，而建设部使用的人口是全市非农业户籍人口数，为880.2万人。

The circulation, consumption and reproduction of the trilogy have not only testified to its historical significance and literariness, but also invested it with new meanings.

该三部曲的流通、消费与再生产不仅验证了其历史意义及文学性，而切还赋予它以新的意义。

If he thought that he could buy me off, he would be wrong.

如果他认为他可以收买我，那他就大错特错了。