主要

Compared with the traditionalroot-locus method, the root-locus method proposed in this dissertation has thefollowing characters:1 The poles location is expressed by polar coordinates.2 The poles location is computed directly.3 The object includes the closed-loop systems and controllers.4 The influence of the parameters on the polar radius and angle can be studied mainly by differential operation.5 The relationship between the polar radius and angle can be studied mainly by differential operation.

与传统的根轨迹法相比，本论文中所采用的根轨迹法具有以下的特点：1 使用极坐标表示极点的位置2 直接计算闭环极点的分布3 研究对象包括闭环系统与控制器4 以微分运算为主要手段，研究了参量的变化对极点的极径和辐角的影响5 以微分运算为主要手段，研究了极点的极径与辐角间的关系本论文从研究Dahlin 控制器振铃现象的成因及消除方法出发，主要进行了以下方面的研究：运用根轨迹法对Dahlin 控制器进行了动态性能分析。

The dominant natural enemies were Propylosa japonica and predaceous bugs in the second generation, P.

二代主要为龟纹瓢虫、捕食性蝽；三代主要为龟纹瓢虫、异须盲蝽；四代主要为异须盲蝽、蜘蛛、龟纹瓢虫。

In the first part of passage, the author explain some base concepts such as information law and the prediction of infor

主要对信息法学和信息法律预测作了简单的介绍，提出信息法律预测的重要作用，总结了信息法律预测的主要方法以及预测中要注意的问题，这些方法也是本文所采用的主要方法。第二章

This article that focuses on the systematic and in-depth research in the current primal problem about abnormal burst pressure reservoir depress burst pressure has procured following main fruits:1 It forms the method which could obtain massive vertical static state mechanics parameters.2 In a foundation of acquisition of rock mechanics parameters,apply bent lamella that as mechanical model along with characteristic of actual geologic characteristics to analysis curvature for anticlinal strcture, get homologous tectonic stress value throug relation between the curvature and stress and different principal curvature in anticlinal structure,consequently set up laminational stress model for anticline reservoir. The block lamination for existed fracturing date has formed method of setting up mechanical model of lamination terrestrial stress by abtaining the block tectonic stress coefficients which are got by complex utilization test, laboratory test and fracturing date playback.3 Analysesing the main reason which lead to high burst pressure by considering the characteristic of reservoir geology,reservoir,and rock mechanics and reservoir damage,etc.Establishing burst pressure quantitative prediction model which provide gist for depressing construction risk and optimizing construction craft under the condition of open hole completion ,gun-perforated completion and damaged reservoir.4 Provding theoretical basis for interpreting acidification pretreatment which could depress busrt pressure by finding the relation between the influencing factors and rock machanics parameters and analysing the factors that have effect on rock mechanics parameters. Expounding the mechanism of reaction of mixed monomineral and acid from the angle of microcosmic element, evaluating quantitatively acid sensilility of different kinds of mineral effectively, and determing the first-order reaction dynamical equation of each mineral.5 Revealing rock mechanics property chage as a result of acid flooding in different condition by sandstone traumata experiment in different temperatures which combined with rock mechanics triaxial stress experiment.6 Associating damage mechanics with sandstone acidizing, established sandstone damage mechanics model in the foundation of the recognition on the rock mechanics parametric variation which is caused by acid-rock reaction in both macroscopic view and microscopic view ,also demonstrated those processes and quantitative estimated the acid busrt pressure to direct the site operation.

本文针对目前异常破裂压力储层降低破裂压力的主要问题展开较为系统和深入的研究，取得了以下主要成果：1形成了利用测井资料，结合室内岩芯测试结果，获取静动岩石力学参数的相关性特征，从而获得纵向上大量静态力学参数的方法。2在获取了岩石力学参数的此基础上，利用弯曲薄板作为力学模型，结合区块实际地质特征对背斜构造进行曲率分析，通过曲率与应力的关系，利用背斜构造不同部位的主曲率求得相应的构造应力值，从而建立起背斜储层的分层应力模型；对已有压裂资料的区块分层，形成了综合利用测试、室内实验、压裂资料反演获得该区块构造应力系数，建立起分层地应力的力学模型的方法。3综合考虑储层地质、油藏、岩石力学特性和储层伤害等因素，分析造成高破裂压力的主要原因，综合利用岩石力学、弹性力学等知识，建立了裸眼完井、射孔完井条件下以及储层受到伤害后的储层破裂压力定量预测模型，为降低施工风险和优化施工工艺提供了依据。4完成了物性、岩性影响岩石力学参数的因素分析，找出了各影响因素和岩石力学参数之间的关系，为从机理上解释酸化预处理降低破裂压力提供了理论基础；从微观元素的角度阐述了单矿物与酸反应的机理；并在此基础上，有效评价了各种矿物的酸敏感性，定量确定了岩石中各矿物的一级反应动力学方程。5完成了不同温度下的酸液类型、酸液浓度、注酸量等一系列砂岩损伤实验，结合岩石力学三轴应力实验，系统揭示了在不同条件下注酸而引起的岩石力学性质变化。6将损伤力学与砂岩酸化相结合，在宏观、微观两个方面认识酸岩反应引起岩石力学参数变化基础上，建立了砂岩损伤力学模型，并对其进行验证，在此基础上定量计算酸化后的破裂压力，有效指导现场施工

Introduction Chapter I introduces the purpose and significance of the topic, as well as stubble pulverizer introduced at home and abroad in the current status and trends of development, The second chapter introduces the various types of stubble pulverizer and its characteristics, Chapter III has made for the future stubble pulverizer in the study design and the production of some of the envisaged applications, the fourth chapter is the overall design stubble pulverizer calculation, Chapter V of this meeting for some of the experience of curriculum design experience, the sixth chapter references.

第一章引言主要介绍了该题目的目的和意义以及介绍了根茬粉碎机在当前国内外发展的现状和趋势，第二章主要介绍了根茬粉碎机的各个类型和其特点，第三章主要提出了对于未来根茬粉碎机在研究设计以及生产应用中的一些设想，第四章是根茬粉碎机的总体设计计算，第五章是对于进行本次课程设计的一些经验心得，第六章是参考文献。

After analysing the flight, cooling and undercooled solidification of multistage atomized droplets, this paper adopts Newtonial cooling, highly undercooled heterogeneous nucleation and steadystate continuous growth model to calculate and simulate numerically the thermal history of droplets and effect of main atomization process parameters during multistage atomization. The results indicated that large undercooling occur mainly during later stage of multistage atomization while recalescence and rapid quenching occur mainly during forced cooling stage.

在分析多级雾化过程雾化微滴的飞行冷却和过冷凝固特点及规律的基础上，本文采用了牛顿冷却、大过冷非均匀形核及稳态连续生长模型，对纯铝多级雾化过程中微滴热历史以及主要雾化工艺参数对其的影响作用进行了数值分析和计算，结果表明：大过冷主要是在多级雾化后期形成的，再辉和急冷则主要发生在强制冷却阶段。

The results showed that grassland and farmland were the main land use types of research area with obvious reciprocal transformation. Grassland was mainly transferred to farmland in 1975-1990. Farmland was chiefly converted to grassland, and grassland tended to increase in 1990-2004. The landscape diversity in the study area rose with the contagion index decreasing and fragmentation degree being intensified during 1975-2000. The advantageous patches maintained good connectivity with the increasing patch cohesion index and the decreasing landscape fragmentation during 2000-2004. The change of human interference intensity played an important role on the variation of land use structure. Land use intensity was mainly affected by the changes in population as well as national land use policies. In the following 20 years, the agriculture land area would tend to decrease, the grassland and unused land area would have a slight reduction by contrasting the increasing the forest land area notably.

结果表明，近30 a来，草地和农业用地面积在该研究区占居主导地位，并且它们之间发生着明显的相互转化。1975－1990年，草地主要向农业用地转移，1990－2004年农业用地主要转化为草地，草地面积增加；1975－2000年，研究区景观多样性升高，蔓延度指数下降，破碎化程度加剧；2000－2004年景观内优势斑块具有了很好的连接性，聚集度增大，整体景观格局破碎化程度降低；人为干扰强度的变化对土地利用结构的变化具有重要作用，土地利用强度主要受人口数量以及国家土地利用政策的影响；在未来20 a间农业用地面积会继续减小，草地、未利用土地面积将有小幅度降低，林地面积会显著增加。

Strengthening responsibility regulations mainly include the perfection of contract guarantee policy in the exploitation of mines, land, and other major resources, the deposit refund system for potential pollutants or reclaimable solid refuse, and overall publication of environmental information.

完善政策主要是改进价格规制激励政策，包括继续改革排污收费制度、健全与排污收费相联系的环境税收政策、加快改革环境补贴政策等；推行排放许可证交易规制政策，主要包括建立排放许可有偿取得与排污交易工作平台、加强必要的能力建设和观念培训、选择适当范围进行试点、加强污染源的排放监测等；强化责任规制政策，主要包括在矿山和土地等重大资源使用中完善履约保证政策、对具有潜在污染性或可回收利用的固体废弃物实行押金返还政策、全面推行环境信息公开等。

Temperature is also a main factor affecting the summer runoff, and the relative influences of mean minimum temperature and averaged diurnal temperature range are 34%, 31%, respectively.

春季径流量的增加归因于平均最低气温的升高，其影响程度为68%；温度同样是影响夏季径流的主要因子，平均最低气温，平均日较差相对影响程度分别为34%、31%；降水量增多、平均地温升高是秋季径流量增加的主要原因，相对影响程度分别是35%、65%；影响冬季径流的主要气候因子是冬季平均最低气温、平均地温，影响程度分别是36%，64%。

Main behaviour of social nature is: compelling force, adjustment, general availability, procedure and culture. The logicality mainly shows by: assuming the form, arrangement of ideas and scientificalness handling sanction. Technicality shows by: main characteristics such a accuracy, rigorousness, authority, being realistic and high-efficient.

社会性主要表现为：强制力、调节性、通用性、可依据性、程序性和文化性；逻辑性主要表现为：假定－处理－制裁格式、层次性和科学性；技术性主要表现为：准确无误性、严谨周密性、权威性、求实性高效性。

For a big chunk of credit-card losses; the number of filings (and thus charge-off rates) would be rising again, whether

年美国个人破产法的一个改动使得破产登记急速下降，而后引起了信用卡大规模的亏损。

Eph. 4:23 And that you be renewed in the spirit of your mind

弗四23 而在你们心思的灵里得以更新