数值

Numerical simulation based on DEM was used on bearing characteristics of single pile setup in sand by different methods.

采用基于离散单元法的颗粒流数值技术对砂土中设置就位后单桩在使用阶段的承载特性进行了数值模拟。

In order to find out how the branch structure affected the characteristic of shockwave propagation, LS-DYNA software was used to compute, and simulate certain shockwave propagating through the branch tunnels with different angle, and the overpressure/momentum bench mark to measure "plane wave" was proposed.

为了研究几何分叉结构对冲击波传播特性的影响，利用LS-DYNA三维数值模拟计算程序，对同一弱冲击波通过不同角度的两向分叉巷道时传播、衰减的情况行了数值模拟，并提出了超压／冲量准则来衡量&平面波&。

According to practical work condition, section of a three segment hoist boom is self-determined with SECWRITE commands, then a finite element model is directly established in ANSYS environment with ANSYS finite element analysis software. Using Beam44 beam unit and node degree of freedom coupling technique to simulate connecting between each boom section and conduct finite element analysis, calculated result of stress deformation for the boom is obtained. The result from digital simulation is in relative coincidence with theoretical analytic result and the nonlinear decline occurrence in boom bending moment curve is explained.

以ANSYS有限元分析软件为工具，按吊臂实际工况，运用SECWRITE命令自定义三节吊臂截面直接在ANSYS环境下创建有限元模型，使用Beam44梁单元和节点自由度耦合技术模拟各节臂的连接，进行有限元分析，得到吊臂应力变形数值计算结果，数值模拟所得结果与理论解析解相吻合，解释吊臂弯矩图出现非线性下降的原因。

Based on the differences between the design value and the survey of the bridge deck elevation in constructing the pre-stressed and so on working condition, the model parameters are identified by ANN, and the beam camber of different sections are given. The results demonstrated that the ANN is efficient and the theoretical results fit well with that of forecasting the beam camber in construction.In this thesis, aim to the beam axis shape be exactitude for design, the internal force of the beam be appeased by design request, the concept of modem cybernetics is applied, At the same time, the effecting parameter has collected. The paper build the ANN model in predicting the beam camber an construction and discuss indetail the extraction of inputting nodes information when quoting the fundamental principle of ANN model and introducing research process of the improved BNN. According to them, ANN is applied in the construction control of prestressed concrete continuous bridge. It is successful for used in the No. 4 bridge of Xiangfan bridge over-crossing Hanriver brideg. To predict the construction camber of by ANN method is useful and effective.

本文以大桥成桥线形满足设计要求和成桥内力控制在设计容许范围内为目的，运用现代控制理论的思想，引用神经网络基本原理，详细介绍BP神经网络的研究过程，从而建立预应力混凝土连续梁桥施工预拱度的神经网络模型，并详细讨论了模型的神经网络结点信息的提取，在工程实例的基础上进行了数值计武汉理工大学硕士学位论文算，数值表明，将神经网络应用于预应力混凝土连续梁桥施工控制，获得了满意的结果，在预应力混凝土连续梁桥施工控制技术研究方面，具有方便有效、精度高的优点，具有良好的应用前景。

When the business card printing and membership card making paper road during periods of low, this number can be reduced when the tension is easier to control; when the business card printing and membership card making way more paper should be appropriate to increase the value of the motor speed ratio in order to meet the innermost paper on tensility, but other paper tape tension you can adjust the feed roller and business card printing and membership card numerical Studio tension.

当所制卡和会员卡制作的纸路较少时，此数值可以适当减少，因为这时的张力比较容易控制；当所制卡和会员卡制作的纸路较多时，应适当增加RTF电动机速比值，以满足最里面纸张对张力的要求，而其他纸带的张力则可以通过调整送纸辊和制卡和会员卡制作部张力的数值进行调整。

Judge clouds' effect on solar radiation by satellite cloud map gray scale values, therefore establish and confirm the relationship between them. Roughly acquire optical depth of clear sky and clouds from radiation station data and routine meteorological data of land surface, and the study the relationship between clouds' physical character and radiation....

通过卫星云图的计数值来判断云对辐射的作用，以此建立起它们之间的关系；利用地面观测资料和常规资料来粗略求取晴空大气和云光学厚度，进而研究云的物理属性与辐射关系；简单的获取地表与近地面大气之间的辐射关系，以此估算地表的反照率，和地表的净辐射；分析了卫星可见光、红外及水汽云图计数值和地面辐射之间关系，利用辐射传输公式来推倒和分析云对辐射的关系，试图建立起卫星测值与地表总辐射和净辐射之间的关系，并将晴空和有云的个例分开，分别建立并选出最佳模式，以此来估算地表的净辐射和总辐射。

Numerical simulation of water injection into coal seam throughlong drill hole and determination of its reasonable parameters

用有限元数值模拟方法求解了煤层注水二维、三维非定常渗流方程，用该数值计算模型结合具体实例，主要分析了工艺参数中注水压力、时间和钻孔间距与湿润范围的动态变化关系，给出了选取合理的注水工艺参数的计算公式。

The results obtained show that the simulation agrees with the basic characteristics of flow and combustion in furnace. This model is also successfully used to optimize the burners'remaking proposals of HC power plant.

第六章是在对炉内的三维流动、传热和煤粉燃烧进行数值模拟的基础上，对煤粉燃烧过程中NO〓的生成进行了数值模拟和程序编制。

Meanwhile, the paper also quantitatively studied the response mode of the soil moisture, crop, trees and grass under climate change conditions with the statistical and numerical models.

本研究选择黄淮海流域、新疆、小兴安岭和内蒙古锡林浩特分别作为农田、森林、草原典型生态研究区，利用较长时间序列的气候资料、遥感数据及其他辅助资料，运用趋势、相关、EOF、突变检验、小波分析及数值模拟等多种方法，在分析研究不同生态研究区气候变化区域特征的基础上，较为系统全面地开展了我国北方典型生态区气候变化对农田生态、森林生态和草原生态典型和敏感生态环境指标的影响研究，包括气候变化对农田土壤水分、农作物发育期和产量的影响；气候变化木本植物和鸟类物候的影响；气候变化对植被NDVI、林木生产力和森林生态环境质量的影响；气候变化对草原土壤水分和牧草产量的影响，同时，通过统计模型和数值模型定量研究了气候变化背景下的土壤水分、作物、林木和牧草响应模式。

Through the analysis of different cross section flow field in cylinder of two-valve and four-valve diesel engine, the following conclusion can be obtained: The formation of intake swirl of two-valve diesel engine mainly is effected by an intense air flow ring zone near the radius from valve axis to cylinder axis, as the flow progresses down through the cylinder, the ring zone air flow expends to both side and finally forms an unified rigid rotating swirl motion.

2号缸盖的螺旋进气道产生的绕自身气门轴线的动量矩比1号缸盖的大，且切向气道的径向速度在前峰面上的数值比1号缸盖的速度数值大很多，因此，两进气道组合后的动量矩损失也大，所以虽然2号缸盖的两个进气道单独的涡流比都高于1号缸盖的两个进气道，但组合后的合成涡流比却是基本相同的。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。