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1.
对自行设计的公和双层独塔斜拉桥下部结构进行了空间有限元分析,有限元分析模型中对不同构件采用不同的有限单元,同时对不同单元之间的连接进行了有效的处理,分析结果表明,在桥墩和承台之间设置的薄壁结构,极大改善了承台与群桩的受力状态,在对桩基结构进行分析的基础上进行了优化设计;优化后,桩基结构应力分布更趋合理,节省了材料,减少了工程量,也进一步了降低了工程造价。  相似文献   

2.
B64油藏为复杂性断块油藏,针对目前的开采现状,对该油藏进行进行数值模拟研究,对各层的储量进行了评价,研究了边水及剩余油分布规律,最后,给出了调整开发方案及进行开发指标预测,很好的改善了开发效果。  相似文献   

3.
本文通过具体的工程实践,利用所获得岩土工程勘察资料对该建筑场的工程地质条件进行了详细的描述,并对场地各方面进行了评价,然后对桩基础进行了评价,计算了地基承载力,并对地层持力层的选择进行验算比较,最后对该场地的适宜性进行综合评定。  相似文献   

4.
在对公司的整体防尘工作进行分析的基础上,根据生产情况进行了选点定位,分掘进、开拓两条线进行了现场实验;对湿式除尘装置的操作规范进行了研讨修改,针对具体情况制定了措施,尤其对重点掘进工作面的使用情况进行了比对分析,除尘效率达到80%左右,较使用前有较大提高。积累了防尘工作经验,为下一步工作的开展奠定了基础。  相似文献   

5.
基于B/S结构的教务管理系统的实现   总被引:7,自引:0,他引:7  
文章分析了高校教务管理工作的流程,对数据库结构进行了分析,对结合B/S的多层应用系统进行了阐述,并对开发B/S模式的服务器端脚本语言进行了评述,通过比较分析,最终选择了基于Unix/Linux的Apache JSP Oracle的组网方案,并结合高校教务管理工作特点,对辽宁工大教务管理系统进行研制开发。  相似文献   

6.
根据康西公路地形特点,参照沿线石料钻探及石质试验数据,对隧道不同开挖方式进行了分析,对隧道漏水的处治进行了研究和探讨,提出了“先治水,后进行衬砌”的处理办法,并对洞内涌水、排水及衬砌的全过程进行了详细陈述。  相似文献   

7.
在建筑物基底埋设土压力盒对桩土应力进行了测试,同时对建筑物在整个施工期间的变形进行了观测,根据实测数据,对结果进行了深入分析,研究了短桩-条基桩土共作用的工作机理,分析了桩土的荷载分配比,并对现行桩基规范中部分条款进行了讨论。  相似文献   

8.
水蒸汽蒸馏实验装置的改进   总被引:1,自引:0,他引:1  
对有机化学实验中的水蒸汽蒸馏装置分别进行了改进,尤其对不同的有机合成产物直接利用原来的反应瓶进行了水蒸汽蒸馏的装置分别进行了改进,使装置中的水蒸汽发生器和蒸馏器的安装简化,使用方便,提高了教学效果,同时对目前有机化学实验教学中普通存在的有关问题进行了讨论。  相似文献   

9.
本文对2,2,6,6─四氯环已酮的合成工艺进行了系统研究,对该反应的催化剂种类、用量、反应温度等工艺条件进行了分析探讨,找出了较佳合成工艺条件,并对产品结构进行了认证。  相似文献   

10.
对钢与混凝土组合梁扭转进行了探讨,提出了以开口薄壁杆件的约束扭转理论为基础的扭转极限分析方法,首先,对组合梁扭转问题进行了讨论,确定其分析方法,将组合梁计算截面进行等效,以便于利用开口薄壁杆件的约束扭转理论对其分析,并示意了等效截面在约束扭转力矩作用下的应力分布情况,提出了组合梁扭转的近似上下限分析方法,其中,前者计算简单,适用于设计,而后者较为繁琐,可作为前者的一个校验标准,最后,通过例题将这2种方法进行了演示。  相似文献   

11.
Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.  相似文献   

12.
何延凌 《科技信息》2008,(4):258-258
Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women's language from these perspectives: pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women's language, more attention should be paid to language use in social context. What's more, the linguistic phenomena in a speaking community can be understood more thoroughly.  相似文献   

13.
理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。  相似文献   

14.
As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.  相似文献   

15.
正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-  相似文献   

16.
We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-  相似文献   

17.
正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that  相似文献   

18.
For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the  相似文献   

19.
<正>"The Journal of Shanghai Normal University:Mathematics"is published by Shanghai Normal University as regular issues of The Journal of Shanghai Normal University each year from 2014 in English.The editors-in-chief of the issues are professors Yuhao Cong and Maoan Han.The Journal of Shanghai Normal University was started in 1958 with  相似文献   

20.
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