稳定分布

Through conducting research on the classification of high density drilling fluid, the optimal grain distribution of adulterant is determined using the density-grain-viscosity curve.

对高密度钻井液进行了分类，以密度－粒度－黏度曲线确定了最优化加重剂粒度分布，通过优化基浆配制工艺、优选强抑制钻井液体系、优化加重剂与钻井液的粒度分布研究，应用超微细、亚微态粒子稳定技术，强化固相控制，形成一套优化的高密度阳离子钻井液技术工艺。

By analyzing the distribution of the zeros to the transcendental characteristic equation associated with the trivial.solution,we obtain some- sufficient conditions on the stability and instability of the trivial solution.These results are generalized to n-unit neural networks by means of space decomposition in this Chapter.

在第二章中，我们讨论了不带自反馈与带自反馈的3元环状神经网络系统平凡解所对应超越特征方程的根的分布情况，确定了系统平凡解稳定与不稳定的充分条件，并利用空间分解的方法把相应的结果推广到n元环状神经网络系统。

Algorithm application of neural networks.Ⅲ Implementation of neuro-computers. The main contribution of the dissertation can be summarized as follows: 1 Hopf bifurcation of three kind of neural networks are discussed in detail, including type of discrete time delay, type of time delay with weak kernel and strong kernel as well as the proof of existence of bifurcation. Other problems such as asymptotic stability of bifurcation periodic solution, algorithm of determining the bifurcation direction, asymptotic stability and style of periodic solution are also studied. The average time delay is chosen as the bifurcation parameter, phenomena pertinent to system states of the continuous time delay network with strong kernel evolving from stable to oscillating, then back to stable again are observed.

论文的主要创新之处可以归纳如下： 1）针对目前国内外对神经网络的分岔研究较少的情况，论文中详细讨论了带离散时延神经网络、带弱核的连续时延神经网络、带连续分布时延且具有强核的神经网络的Hopf分岔现象，从理论上证明了Hopf分岔的存在性，并研究了分岔周期解的渐近稳定性，得到了确定周期解的渐近稳定性、分岔方向、周期解的渐近形式的算法；用平均时延作为分岔参数，发现带强核的连续时延神经网络中存在着系统的状态由稳定变化到振荡现象，当继续增加平均时延参数时，又从振荡变为稳定这一特殊的动力学现象。

The results indicated that the pesticide could be distributed through the body and cumulated in peripheral compartment relatively,but it could be eliminated rapidly.With parameters such as t1/2α valued 3.40min,t1/2β 59.03min and Cl 0.018ml·min-1,Its metabolism followed two-compartment open model after administration of 10 mg/kg.It was primary distributed to blood-riched organs and fat tissues and ready to be biotransformed.The metabolic product were detected in choler,which had stronger polarity with retention time 4.25min;and no parent compound was found in both urine and faeces.Key words: Toxicokinetics;Fenamithion;Organophosphorus pesticide

结果显示：螨胺磷在体内全身分布，并有周室富集，消除较快，在10mg/kg静脉注射呈二室模型，t1/2α为3.40min，t1／2β为59.03min，全身清除率Cl0.018ml·min-1；螨胺磷主要分布于血流量大的器官及脂肪组织；螨胺磷在体内不稳定，能被肝脏代谢转化成极性更高的化合物后经由胆汁排出，该成分可在同样的色谱条件下被分离，峰保留时间4.25min；粪尿中均未检出原药。

In terms of the synoptic environment and precipitation characteristics, there were some common characteristics in these two cases. For instance, warm and moist air with the conditional instability atmosphere in the lower troposphere, it was associated with the highest equivalent potential temperature gradient and strong moisture contrast to below 700 hPa. The lower-level convergence was the major produced mechanism of MCS and the low-level southwesterly flow generated convective instability.

从综观环境条件与降水特徵显示，两个案共通特徵包括（1）低对流层属暖湿条件性不稳定大气，（2）最大相当位温梯度以及水气梯度分布於700 hPa以下，（3）低层辐合均为个案中MCS之重要激发机制，（4）有明显低层西南喷流，大气呈现对流性不稳定状态，（5）中层短波槽线的移入，以及（6）高层辐散分流场的存在，提供MCS发展的有利环境条件。

In this dissertation, systematic and extensive conformational search has been performed for asparagine and aspartic acid in gas phase and solution and the properties of the stable conformers are studied using DFT based first-principles calculation. The concerned properties include geometry structure, IR spectra, conformer distributions, intramolecular interactions, ionization energies and electron affinities, protonation and deprotonation processes.

在本论文中，我们对天冬酰胺和天冬氨酸在气相和溶液中的稳定构型进行了系统而全面的寻找，并研究了其稳定构型的几何结构、红外光谱、构型分布、分子内相互作用、电离能、电子亲合能、质子化和去质子化过程等相关性质。

Because of its stable chemical property and reasonable and controllable particle size distribution, pure white and glittering color, the cristobalite silica powder is widely used in industries like chemical engineering and precise casting, etc.

在煅烧过程中严格控制煅烧温度，可稳定地改变晶体结构，由于其稳定的化学性质，合理有序，可控的粒度分布和色泽洁白晶莹而被广泛地应用于化工、精密铸造等行业，是白色高级涂料、橡胶、牙齿模型、油墨的理想原料。

Research usejP.Haggett"s pattern of spatial structure and system, analysis technique of tourism market space and data of spot check to analyze the evolvement of spatial structure and problems of tourism development from six faces, move, path, crunode, significance of crunode, ground and diffuse. The law of the evolvement of spatial structure: First, tourism development keeps rising. Second, AR of xi"an is very big and stable, Xi"an is tourism hotspot and center. Third, origin market space sticks out east, and isn"t continuous. Fourth, tourist proportion of XAZ follows the low of distance decay. Distance decay is very obvious in adjacent zone because of little attraction. Sixth, the spatial distribution of tourist origins has become less concentrated. Tourist origins of east China develop quickly. Three problems: First, tourism development is very unbalance between Xian and its adjacent zone.

西安及毗邻地区的国内客源市场空间结构的研究，采用了英国著名地理学家哈格特描述的空间结构模式与秩序，利用旅游市场空间分析技术，借助市场抽样调查、数量分析，从运动模式、路径、结点、结点层次、地面和扩散6个层方面进行了剖析，归纳总结出5个客源市场空间结构演变规律：(1)旅游业发展整体保持增长趋势；(2)客源吸引半径大而稳定，西安市是全国性的旅游热点城市和旅游中心城市；(3)客源市场分布突向东部，呈不连续分布；(4)游客比重的距离衰减普遍存在，毗邻地区吸引物及自然吸引物吸引力较小，距离率减明显；(5)客源集中度减小，客源市场发展呈现跳跃式增长的演变规律。3个市场拓展面临的问题：(1)西安与毗邻地区间旅游业发展不平衡现象明显；(2)客源市场区位不佳；(3)旅游产品单一老化，类型单调乏味。

Based on the information taken from the subcompartmental records a comparison between the actual and normal forests was made and a new point of view was proposed in the article: in the case of cultivating timber-forest which is different in cutover age, age class and growing speed within the range of the whole forest station, the forest age class distribution showing the opposite shape of "J" is of more benefit to keeping the relative stability of all the age class area than the age class distribution of th...

本文在统计森林资源小班档案卡片有关资料的基础上，把现实林分与法正林相比较，用法正林学说来指导全场森林的调查。并提出了一个新的观点：在整个经营单位内，培育不同生长速度，不同主伐年龄，龄级期不同的用材树种，森林的龄级结构呈反"J"形分布此法正分布更有利于维持各龄级面积的相对稳定，并且，年伐量的波动不大，有利于森林的永续利用。

During 1980 to 2002, the whole patch's quantity increases and has the phenomenon of crumble. In addition, the distribution of each patch becomes more disperse gradually, and the enchase decreases. During 2002 to 2006, after the creek engineering project has been put in place for several years, the whole landscape structure starts to become in ordered. Proven by the bird research data, higher sample are mostly scatter along the river side. Therefore, the creek engineer is able to stabilize our environment, and the big patch is increasing because of the plan of patch, as a result, the variety of birds in the testing area increases by a significant number.

於1980 ~ 2002年间，在人为大力开发加上天然风灾肆虐下，整体块区之数量渐增且形状有呈现破碎化之现象，而各类别块区之分布逐渐分散，且镶嵌度亦有下降之情形。2002 ~ 2006年，经逐年之野溪工程整治，整体景观结构有朝向规整化的情形，且以鸟类调查资料验证，丰度较高之样点大多沿著溪流分布，故可得知，野溪工程之施作对环境有稳定之功能，且因块区之规整使大块区数量增加，亦使研究试区之鸟类生态丰富度增加。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。