查询词典 isolation 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。

The mechanical behavior of Shape Memory Alloys material is tested, and the constitutive model of the SMA is established. A kind of SMA combined rubber isolator is developed, and the isolation effect of the SMA combined rubber isolator for long-span bridge and tall building structures is numerically simulated, from which the adaptive isolation performance and the self-restoring capacity of the SMA combined rubber isolator are verified. A kind of SMA damper is developed, the mechanical behavior of the SMA damper is tested, and the model of restoring force of the SMA damper is established. The theory and method of adaptive control based on the SMA damper for the long-span bridge are built, and the effectiveness and reliability of the adaptive control for the long-span bridge using the SMA damper are verified through numerical simulation and model test. The MRF-04K type magnetorheological damper is developed, the mechanical behavior of the MR damper is tested, and the model of restoring force of the MR damper is established. The theory and method of adaptive control based on the MR damper for the long-span bridge and tall building structures are built, and the effectiveness and reliability of the adaptive control for the long-span bridge and tall building structures using the MR damper are verified through numerical simulation and model test. In addition, the theory and method of sub-structural damage identification for long-span bridge are derived, the influence of soil-structure dynamic interaction on the seismic isolation and control effects with different isolation and control measures and the damage responses and the sliding base-isolation of large structures under the excitation of underground explosion are investigated.

试验研究了形状记忆合金材料的力学性能，建立了SMA材料的本构模型；研制了一种SMA复合橡胶隔震支座，数值仿真分析了应用SMA复合橡胶支座的大跨桥梁和高层建筑结构的隔震效果，从而验证了SMA复合橡胶支座的自适应隔震性能及其震后自恢复能力；研制了一种SMA阻尼器，试验研究了SMA阻尼器的力学性能，建立了SMA阻尼器的恢复力模型，建立了基于SMA阻尼器的大跨桥梁结构自适应控制理论与方法，通过数值仿真与模型试验验证了大跨桥梁结构SMA阻尼器自适应控制的有效性与可靠性；研制了一种MRF-04K型磁流变阻尼器，试验研究了MR阻尼器的力学性能，建立了MR阻尼器的恢复力模型，建立了基于MR阻尼器的大跨桥梁和高层建筑结构的自适应控制理论与方法，通过数值仿真和模型试验验证了大跨桥梁和高层建筑结构MR阻尼器自适应控制的有效性与可靠性；还建立了大跨桥梁结构的子结构损伤识别的理论与方法，研究了土-结构动力相互作用对不同隔震和控制措施的减震控制效果的影响以及地下爆炸波作用下各类大型结构的灾害响应与滑移隔震。

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。

Thirdly, a new type base isolation system, i. e., slide-limited friction base isolation system is presented in this paper. Based on this system, harmonic and subharmonic periodic response of S-LF subjected to harmonic motion is investigated by using Floquet theory. Dynamic response of sliding structure subjected to earthquake ground motion is calculated with a precise high order direct integration method, and the numerical results are presented in terms of maximum acceleration response spectra of supcrstructure and maximum sliding displacement response spectrum. By comparison with isolating effects of pure-friction base isolation system and resilient-friction base isolation system , it shows that the isolating characteristic of S-LF is superior to P-F and R-FBI. Through analyzing an engineering example, it is observed that the maximum inter-storey shear force and absolute acceleration of sliding structure to earthquake ground motion are very different from those of traditional structures.

提出了一种新型基础隔震模型，即带限位装置的摩擦隔震体系；基于此隔震模型，利用Floquet理论研究地面谐运动下S-LF结构的运动特性；并利用高精度的精细时程积分法，通过对地震作用下S-LF动力响应的计算，绘制了上部结构最大加速度反应谱和基底最大滑移量反应谱，并研究了各种结构参数对隔震的影响；通过与恢复力摩擦隔震系统和纯摩擦力滑移隔震系统的比较表明，S-LF的隔震性能优于P-F和R-FBI；对计算实例的分析发现，地震作用下S-LF结构的层间最大剪力和最大绝对加速度反应分布较一般传统结构有很大区别。

A semiconductor device including a high voltage element and a low voltage element, including: a semiconductor substrate having high voltage element region where the high voltage element is formed, and a low voltage element region where the low voltage element is formed; a first LOCOS isolation structure disposed in the high voltage element region; and a second LOCOS isolation structure disposed in the low voltage element region, wherein the first LOCOS isolation structure includes a LOCOS oxide film formed on a surface of the semiconductor substrate and a CVD oxide film formed on the LOCOS oxide film, and the second LOCOS isolation structure includes a LOCOS oxide film.

提供一种在确保高耐压元件的高耐压特性的同时使高耐压元件和低耐压元件具有良好特性的半导体装置。具有高耐压元件和低耐压元件的半导体装置包含：规定了形成高耐压元件的高耐压元件区和形成低耐压元件的低耐压元件区的半导体衬底；在该高耐压元件区设置的第一LOCOS隔离结构；以及在该低耐压元件区设置的第二LOCOS隔离结构。第一LOCOS隔离结构由在该半导体衬底的表面上形成的LOCOS氧化膜和其上形成的CVD氧化膜构成，第二LOCOS隔离结构由LOCOS氧化膜构成。

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。

If you were not , and OS X just booted normally, have no fear.

如果你没有，和OS X刚刚启动通常，没有恐惧。

I only want to preserve our all .

我只想保存好我们的一切