理论上的

In these article, three parts were included, In the first part, the related theories of small town development were discussed, induding well-considered findings for small towns at home and abroad and the mechanism of development of small towns and the way of classification, and also the role of small town in developing a certain region was discussed in theory.

第一部分论述了小城镇发展的相关理论，包括国内外形成的有关小城镇的研究成果，中国小城镇的发展机制和分类方法，并且从理论上论述了小城镇在区域经济发展中的作用。

Goal: To obtains the compound quantum chemistry parameter using chemistry software computation, carries on the structure analysis to this kind of weed killer member, theoretically explained that this kind of compound biology characteristic and the structure relations, for this kind of compound's activeness, the toxicity predict that action mechanism's research provides the rationale.

目的：通过利用化学软件计算得到化合物的量子化学参数，对该类除草剂分子进行结构分析，从理论上解释该类化合物生物特性与结构的关系，为该类化合物的活性、毒性预测，作用机理的研究提供理论基础。

The sixth chapter will discuss the initial alignment of the Marine SINS theoretically. First, the error characters of initial alignment will be analysed, then, a new two-position alignment method together with the realization of the estimation of the gyroscopes' random constant drifts will be presented.

第四部分从理论上着重讨论了舰载捷联式惯导系统的初始对准问题，对初始对准的误差特性进行了较深入的分析，提出了可在初始对准的同时完成对陀螺仪随机常值漂移估计的双位置对准方法，并对该方法进行了理论分析，可行性分析和仿真计算分析。

The main research tasks and results are as follows:(1) Through comparing the stress intensity factor of compact tension specimen calculated by finite element software with the theoretical value, the feasibility of calculating fracture parameters of crack tip in ABAQUS software was verified.(2) The relationship between the elastic modulus of the material and research scale was studied based on deriving the cohesive stress theory and other relevant theories. And the elastic modulus of the material on meso-scale was determined.(3) Global model and sub-model of the finite element were built in th...e macro-scale, and stress-strain field nearby the crack tip was analyzed, and the results show that the detailed stress-strain in the crack tip could be obtained by using the sub-model technique.(4) In meso-scale, the crack growth model was also established by assuming the crack propagating along the grain boundary, and the detailed stress-strain field in the crack tip was obtained.(5) The effect of crack length on Von Mises stress, and maximum principal stress and strain was analyzed in meso-scale when equivalent KI equals 30MPa.m1/2. And the results show that except for crack tip area, the stress-strain distribution in whole specimen is not affected.

主要完成研究内容和取得成果如下：(1)利用有限元软件计算出紧凑拉伸试样的裂纹尖端应力强度因子KI值，其结果与理论值一致，从而验证了利用ABAQUS计算裂纹尖端相关断裂参量的可行性；(2)在研究内聚应力等相关理论的基础上，推导出了研究尺度与材料弹性模量的近似关系，并确定了介观尺度上的弹性模量；(3)在宏观尺度上建立了全局有限元计算模型和子模型，得到了裂纹尖端应力应变场分布，结果表明利用子模型技术获得比较准确的裂纹尖端应力应变场分布是可行的；(4)在介观尺度上利用平均晶粒尺度的方式建立了裂纹沿晶扩展模型，得到了裂纹尖端断裂过程区的微观应力应变场；(5)当应力强度因子为30MPa.m1/2时，分析了介观尺度上在裂纹沿晶扩展过程中裂纹长度对Mises应力、最大主应力和应变的影响，结果表明，裂纹扩展长度对试样整体应力应变分布影响不大，而对裂纹尖端区域有较大影响；(6)介。。。

Based on the reflection of literary criticism"s definition of body writing in 90"s, this paper holds that literary criticism in 90"s ignored the Utopian tendency of western body writing theory, overstated the universal adaptability of this theory as a strategy to women emancipation, which obscured the truth of female writing"s succumbing to consumption-driven culture.

反思90年代文学批评对身体写作的命名，本文认为，在误读的基础上，90年代文学批评忽视了西方身体写作理论中的乌托邦倾向，强调了此一理论作为一种女性解放策略的普适性，同时也遮蔽了女性写作屈从于当下消费文化的真相。

Scientists' attention is paid to the discription of the self-adjoint boundary condi-tions of singular differential operators during 50 years recently.

对称微分算子理论中自共轭域的描述，是微分算子理论中的基础问题之一，常型的问题在五十年代已得到解决，五十余年来人们更多的注意力放在奇型微分算子自共轭边界条件的描述上。

Hu Shi, one of the major figures promoting vernacular literature in the May Fourth Movement, legalized the vernacular Chinese poetry, and also developed the vernacular literature style to the newly high level.

在新诗理论建设的问题上，胡适以&白话&为核心来建构新诗理论，鲜明的诗体意识使得白话诗从古典诗中解放出来；另一方面，其白话诗论的负面因素给日后新诗的发展埋下了危机。

Mere things like your wattle and daub hut, several oxen and a shiny necklace are no longer impressive; now you need to have followed the Inca trail, formed an opinion on G. K. Chesterton's Christian apologetics and be familiar with the Higgs boson's role in a grand unified theory.

仅仅是抹灰的篱笆小屋，几头公牛，闪闪发光的项链早已没有吸引力了；现在，你需要的是：踏上过印加之路，对切斯特顿的基督教护教理论有所见地，还要熟悉黑格斯玻色子在大统一理论中的作用。

The experiments results verified the effectiveness of the three degrees freedom input of parallel decoupling rowing driving mechanism and the correctness of the theory analysis about water strider robot in this paper. At last, it appeared that the water stride robot in this paper has good velocity response characteristics, motion flexibility, high rowing efficiency and convenient control.

在上述理论研究基础上，研制仿水黾机器人样机，在实验室环境下对仿水黾机器人进行水面前进、转弯、负重实验，实验结果验证了本文提出的仿水黾机器人三自由度输入并联解耦划水驱动机构的有效性和本文理论分析的正确性，该机器人具有良好的速度响应特性、运动灵活性，划水效率高、控制简单方便。

The theory of surfaces made a slow start. It began with the subject of geodesics on surfaces.

曲面理论也经历了一个漫长的开端，曲面理论是从曲面上的测地线的研究开始的。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。