基本参数

In Chapter 2,the polarization and loss mechanism of fruit in the alternating current arestudied,and dielectric parameters such as dielectric constant、equivalent impedance andequivalent capacitance are put forward to analyze the interaction between fruit internalquality and alternating current.

第二章 研究了水果生物介质在交变电场作用下的极化和损耗机制，提出了复介电常数、等效阻抗及等效电容几个相互联系又有所区别的电特性参数是研究交变电场与水果相互作用的基本参数。

There are many significant topics, including Huge Scale Parallel Broadcasting Technology, the Scale-free of Internet and WWW, the essential parameters of Internet in China in which network average distance, power law equation and exponential and so on, the structure of ACN and emulational experiments, the UCL technology in ACN.

主要研究了：大规模并播技术（尤其是基于数据广播的体制）；互联网与万维网的无尺度效应，尤其是我国的互联网络的平均距离、幂律方程及参数等我国互联网模型的基本参数；互补结构网络的结构形式及网络参数仿真实验；互补结构网络中的UCL技术。

According to the operating characteristic of the fluidics and the theory of hydromechanics, a dynamic model of the impactor is established, in order to bring the percussive rotary drilling technology into full play. Also a simulation program is developed to calculate the working properties of the impactor. By using the simulation program, the variation laws of the basic parameters of the hydraulic impactor under different structural parameters and hydraulics are obtained.

为充分发挥冲击旋转钻井技术的应用效果，在考虑射流元件工作特性的基础上，运用流体力学理论建立了液动冲击器工作动力学模型，并编制了计算液动冲击器性能参数的模拟程序，通过模拟计算程序得到了在不同液动冲击器结构参数和钻井水力参数下液动冲击器基本参数的变化规律。

The soil parameter is the basic parameter in the soil engineering design, but the variety of soil parameter have the very strong region characteristic.

岩土参数是岩土工程设计的基本参数，而岩土参数的变化具有很强的地域特征。

The main contents and achievements are summarized as following: 1. The principle of tension leveling of metal strip is described systematically using relative tension and relative curvature on the basis of plane hypothesis including the stress distribution on the section, the condition to undergo plastic longitudinal elongation, the calculation of longitudinal elongation, the change of tension along the strip etc.. 2. The tension leveling process of metal strip on a multi-roll arrangement is investigated detailed by nonlinear finite element method and many rules to guide the strain, deformation, stress and bending moment are discovered and illustrated.

本文的主要内容和成果如下： 1、以平面假设为前提，采用解析分析方法，建立了以相对张力和相对弯曲曲率为基本参数的平面应变金属带材拉伸弯曲变形基本原理较为系统的描述，描述涉及到应力分布与两个基本参数的关系、带材塑性延伸的边界条件、带材延伸率的计算、带材张力变化的计算等。

A number of calculation examples, including past experiments, our experiments, thick slabs experiments, thin slab experiments, single slab experiments and doweled slabs experiments, are given. By comparing test values with calculating values, some significative conclusions are drawn. The superiority of generalized conforming element for thick-thin slab on foundation is pointed out. The average ranges of foundation parameters are given according to these experiments.

6利用有限元程序进行正分析，用遗传算法进行反分析，识别地基的基本参数，实现地基参数的原位测试；给出大量算例，包括前人的试验和本文的试验、薄板与厚板、单板与接缝板，通过计算值与实测值的比较，得出一些较有意义的结论；阐明了双参数地基上广义协调厚薄板通用元的优越性并给出了试验场地地基参数的平均取值范围。

Through this study, the sustainable management hierarchical system of forest ecosystem was established, providing the frame of forest sustainable management which given dominance to the basic hydrology ecosystem processing of mountain forest. At the same time, this research brought forward the "double-cycle" mode maintaining the integrality of Tianshan Mountain forest ecosystem. Within all these studies, on one hand, through the research about the regeneration response to different disturbance types, the scientific measures concerning restoration and rebuilding of fragmentized landscape were supplied. On the other hand, t

建立了森林生态系统可持续经营等级系统，为天山以森林生态系统基本水文生态过程为主导的森林可持续经营提供了框架；提出的天山森林生态系统生态完整性自维持的&双循环&模式为天山森林生态系统的可持续经营奠定理论基础，通过不同干扰方式下天山云杉的更新反应研究，为破碎化森林景观的恢复与重建提供了科学途径，通过对天山云杉分布格局及动态、更新格局、林冠干扰后的系列特征及相应的参数和反映种群生活史的生命表研究，为天山森林生态系统可持续经营景观水平的评价提供了基本参数。

It effectively solves the problem of contact mechanics between burden granules. The dynamic data structure that is a linked list is built to save and delete the varying data in simulation calculation process. Therefore, the distinct element method simulation model of charging bell-less top blast furnace is established in view of the distinct element method model of blast furnace burden granular.

本文首先对离散单元法的基本原理和数值计算方法进行了系统研究，针对高炉炉料颗粒介质特点，对离散单元法进行了相应改进，建立了高炉炉料颗粒运动的离散单元法基本数学模型，推导出了相应的高炉炉料颗粒离散单元法数值计算基本参数的计算公式，例如阻尼、刚度、时步等，并确定了合理的数值模拟参数值。

Skid wooden box parametric design system was designed by using Visual Basic and Access, based on SolidWorks. The establishment of databases and standard model bases as well as parametric design procedures was introduced. The function of the system was illustrated by specific examples. The system can generate qualified skid wooden boxes by inputting basic parameters. Automatic wooden box design was realized.

利用Visual Basic语言，并结合Access数据库，对SolidWorks软件进行二次开发，开发了滑木箱参数化设计系统详细介绍了数据库、标准模型库的建立以及参数化设计过程并通过实例展示了系统的具体功能，用户只要输入基本参数，系统即可生成符合要求的木箱，实现了木箱设计的程序化、自动化。

Identification and selection of dominant vibration-modes contributory to wind-induced vibration response for large-span space lattice structures;2. The wind-induced vibration response of single-layer cylindrical shells is analyzed by frequency domain method in this paper.

运用频域分析法对单层筒壳进行风振动力响应分析，在基本参数(阻尼比参数、地貌参数、几何参数、支座高度参数)的常用变化范围内，进行大量的算例计算，然后对所得的计算结果进行统计分析，考察各参数对单层筒壳的风振响应及风振系数的影响，在此基础上提出单层筒壳抗风设计的实用方法。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。