2 . the creep and the concretion of the soil under either the natural conditions or the external loads are considered to approach the actual impact . moreover , several settlement models and their computing methods are studied , including the simple theory method and the semi - theory & semi - experience method 2 .在自然状态和外界荷载作用下,适当考虑土体的蠕变、固结等实际问题,从而更接近实际效果;分析比较了几种沉降模型及其计算方法,主要为简易理论法、半理论半经验法等。
Now some universities and institutes of china have made some samples of the lunar rovers and theirs wheels , but until now the wheel ’ s mechanical performance is seldom researched and tested . this paper will analyze the mechanical performance of the wheel and design a test - bed to test the performance of the lunar rover ’ s wheel . firstly , the mechanical characters of the soil are separated to press - sinkage character and shear character based on bekker ’ s theory , and common press - sinkage and shear models are introduced and the theory of lankine passive earth pressure is also introduced 根据bekker半经验法的基本思想,将土壤的力学特性分解为水平方向的剪切特性和竖直方向的承压特性,阐述了地面力学中常见的土壤的承压、剪切等力学模型,并引入了朗肯被动土压力理论,为建立车轮在松软土壤中前进和转向的力学模型奠定了基础,同时进行了实验土壤的剪切实验,测量了土壤的内聚力和内摩擦角等参数。
Among these , the first part makes use of the second - hand information to carry out the research for the market demanding and the history prices of the end project products . the experience is relied on determine the price needed in the analysis of long - term investment decisions ; the second part analysizes the project investment decision by the way of using some long - term investment decision theories such as recovery period method , npu , net present index method and remuneration included methods , etc . meantime , it makes the risk analysis for the project and determines the risk elements and proposes some measures and guidance in risk management 其中，第一部分对企业及项目情况进行了介绍，并使用二手资料的方式对项目产成品的市场需求及历史价格进行了调研，根据经验法确定了长期投资决策分析中所需的产品价格；第二部分对进行长期投资决策分析的理论进行了阐述，利用回收期法、净现值法、净现指数法和内含报酬率法等长期投资决策理论对项目的投资决策进行分析，并对项目进行了风险分析，确定了风险因素，提出了风险管理中为避免风险应当采取的一些措施和方法。
On base of the theory and makeup of the process printing system , we analyzed the characteristic of the system model . in order to find a control strategy adapt to the register system , we introduced several controller , then gave a new pid controller with threshold value . and gave several classes digital arithmetic of pid controller 在深入了解凹版印刷机彩色套印系统工作原理的基础上，对系统模型的不确定性、滞后性、大超调量和震荡等特点做了进一步分析，提出了一种新的带有阈值模糊控制的pid控制策略，对其离散化后，给出了此算法的单片机实现，并使用经验法进行参数整定。
Research on supply chain risk management system introduction to the basic knowledge of supply chain risk management : identification of supply chain risk and so on . then , according to the process of risk management , the author do the work as follows : identification of supply chain risks with the experiential method , measurement of risks identified with expert marketing method , risk management with quantitative model and qualitative methods , supervision of supply chain management process and all risk management indexes . this part is the basis of the dissertation , and also the main contribution 根据供应链风险管理的流程,展开以下研究:经验法识别出供应链风险,按照已有的风险度量标准,根据专家打分给出风险度量,分别利用定量和定性的方法管理风险:定量部分即供应链风险管理的数学模型,可以分为战略、战术和运作三个层面,战略和战术模型属于局部的模型已经有较成熟的研究,本文选择战略层上的数学模型,在简单比较不同模型的优缺点基础之上,给出最优、最实用和有效的数学模型;然后是定性的风险处理方法。
In this paper , the author analyses various form factors and shapes of a few hullform alternatives of a 2000 teu container , by use of the methods of experience , design charts , to estimate their performance ; adopting numerical methods to calculate their drag and effective horse power , studies the principal effects of both form - factor variations and hull shape change on their hydrodynamic performance , and other problems to be noticed in ship remoulding 本文主要通过对2000箱集装箱船的几个变形船型的主要参数和形状进行分析，采用经验法和图谱方法对各变形船型作性能估算分析，并用数值方法计算各船型的阻力性能，初步探讨船型参数、形状改变对性能影响的主要方面，研究改型时应注意的问题。
In the industries , to date , the task of tuning controllers is carried out mainly by using engineering method , such as ziegler - nichols scheme , field test and history data or engineer ' s experience by which engineers expend lots of tuning time but it is dift1cult to obtain the optimum result 三是到目前为止，还没有作为现场工程技术人员实际使用的集现代控制系统设计方法与计算机技术为一体的控制系统实用整定装置， pid控制系统的现场实际整定仍主要采用工程设计法(如ziegle - nichols法) 、经验法及试凑法等。
Thus , full attention to risk management , the establishment of large it projects risk management system and risk analysis theory methods comprehensive , in - depth and meticulous research and the success of the project will achieve its objectives and achieve the optimum allocation of resources play a role in guiding theory 本文针对大型it项目的特点,立足于风险管理角度,对吉林电力客服支持系统项目进行项目风险管理方案设计和实证研究。首先,在风险辨识中,针对大型it项目特点首先使用类推比较/历史经验法讨论该项目主要风险,再用专家访问法小范围辨识。
