查询词典 mathematical expectation
- 与 mathematical expectation 相关的网络例句 [注:此内容来源于网络,仅供参考]
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Basing on experimental study, the article analyses the process of calcination and desulfuration reaction and builds a mathematical model of calcium-based materials (limestone, shell and their mixture), which will provide theoretical basis and practical guidance for improved performance of the normal sulfur sorbent and the choice of new sulfur sorbent.
然而传统的燃煤固硫剂石灰石,因钙转化率低而使该技术的推广应用受到限制,在实验研究的基础上,对钙基材料—石灰石和贝壳用于燃煤的煅烧固硫反应过程进行数学建模与分析,以便为改善常规固硫剂的性能,选择新型固硫剂提供理论依据和实用指导。
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This article based on net disperse method has first established the description arbitrary shape non-uniform face target mathematical model.
但是在计算其毁伤效果的时候,难以解决判断网格离散点是否属于目标离散点的问题,没有比较有效的算法对面目标进行离散化。
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Based on the virtual prototype technology and simulative software platform Pro/E, the double rotating shaft supporting mechanism of wind tunnel testing model was designed and developed, and the mathematical model of angle control was established.
基于虚拟样机技术及仿真软件平台Pro/E,设计开发了风洞试验模型的双转轴支撑机构,建立了角度控制的数学模型,实现了机构的虚拟样机设计和运动学仿真,获取了被测试验模型运动情况的运动参数曲线,并对双转轴机构实施了干涉的动态检查,为双转轴机构设计方案的交流与评估,以及双转轴机构的制造与应用奠定了基础。
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The TiO2 thin film on quartz glass is prepared by Liquid Phase Deposition method. The thicknesses of the films are determined by a spectrophotometer. The influence factors on the thicknesses such as ultrasonic vibration, times of sedimentation, sedimentation time and concentration of TiO2 colloid are investigated. A mathematical model of sedimentation is set up on the basis of gas adsorption theory.A photocatalytic continual tub reactor is set up.
本论文介绍了纳米TiO_2光催化降解甲醛的机理;用液相沉积法在石英基片上制备出纳米TiO_2薄膜,利用分光光度计间接测量TiO_2薄膜厚度,研究了超声波震荡、胶体浓度、沉积时间及沉积次数对薄膜厚度的影响;借鉴气体吸附理论,初步建立了制备TiO_2薄膜的沉积动力学模型。
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The test method and mathematical model related in thepaper also have practical value to forecast the residual life for high-temperature pressure-containing and to determine the refresh time for extended service pipe and welded joint.
文中提出的试验方法和数学模型对高温承压部件的残余寿命的预测和确定那些超期服役管道或接头的更换时间方面具有实际意义。
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The processes of dividing up and sequential calculation for the actual system are described, and the mathematical description of the method is given clearly.
描述了实际系统分割和顺序化计算过程,给出了顺序化计算方法明确的数学表示。
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In the first, it discusses the necessity of introducing mathematical method into sentence both in civil law and case law.
首先,本文论述了用模糊数学理论与方法来解决两大法系中定罪量刑不确定性问题的必要性。
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In the first, it discusses the necessity of introducing mathematical method into sentence both in civil law and case law.
首先,从理论和现实两个方面论述了用模糊数学理论与方法来解决两大法系中定罪量刑不确定性问题的必要性。
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"I see scientific research as being, in a mathematical sense, a form of chaotic human behavior," he tells me.
&从数学的角度来看,我把科学研究视为一种混沌的人类行为,&他告诉我。
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Main points of the thesis are as follows:(1) The main function models and information relations between these models in the CAPP system in the integrated CAD/CAM project are explained, a new process plan design method is mentioned based on analyses of process plan design. This method is based on the process plan prototype, and develops the prototype little by little until the perfect process plan is completed, the prospect of this method is discussed;(2) The feature abstracting rules and methods are studied, a feature coding system is developed based on GT, all the defined feature models are described by the mathematical methods;(3) The integrated method of CAD/CAPP based on features is mentioned, this method defines a feature exchanging model, and develops an interface software to exchange design data into technology data base, this technology data base includes the design and technology information of the parts;(4) The process plan reasoning method based on features is created, this method uses Mycin algorithm to solve the reasoning of the feature process plan. A process plan making system is developed. In this system part process plan is made by the semi-intelligent method, this method uses the feature reasoning, feature process chain searching and man-computer talking together;(5) The main structure of the HOPE system is introduced, a shaft drawing and its process plan made by this system are shown, the data process problem in process drawing making is also discussed;(6) A new method of describing process rule is introduced, this method uses IfThen rules and neural nets weight values together to describe process rules, the BP algorithm is adopted in this method;(7) The optimal machining sequence problem of the process steps on the same fixturing is discussed, optimal algorithms SA is applied to solve this problem, the result shows that this method is more efficient than the traditional method;(8) All jobs in the thesis are summarized. In order to carry out the research in the future, some rational proposals are given.
全文论述的内容主要有下列几个方面:(1)较为系统地阐述了CAD/CAM一体化工程项目中CAPP系统的主要功能模块及其信息流程,在分析工艺设计过程的基础上,提出了基于特征原型的渐进式工艺设计方法,并探讨了该方法的应用前景;(2)研究了零件特征提取的原则和方法,在成组技术的基础上,开发了一套基于特征的分类编码系统,并在提取零件特征的基础上,定义了零件特征的数据模型,开发了基于轴类零件特征的参数化设计系统;(3)研究了基于特征的CAD/CAPP集成的方法,通过定义零件特征数据模型的存储结构,开发了将设计数据转换到工艺数据库中的接口程序,为后续的CAPP系统提供必要的零件形状和工艺信息;(4)研究了基于特征的工艺推理方法,将Mycin算法应用到工艺决策中,开发了基于特征的工艺推理及工艺方案生成系统,在系统中综合运用特征推理、特征加工工艺链查询及人机对话相结合的半智能化方法确定零件加工工艺;(5)介绍了整个HOPE系统的总体结构,通过运行HOPE系统绘出了一轴类零件的零件图,并生成了该零件的加工工艺方案,初步探讨了基于特征的工序图生成技术中数据处理问题;(6)研究了工艺设计过程中知识如何有效表示的问题,提出了将显式的IF-THEN规则表示与隐式神经网络权值表示相结合的工艺知识表示方法,并利用BP算法进行了工艺知识表示的初步研究;(7)研究了工艺设计过程中同一安装下工步优化排序问题,利用神经网络中基于模拟退火的理论来解决该工步优化排序问题,实践证明该方法较传统的算法具有更高的效率;(8)总结了本文所进行的研究工作,为今后进一步开展工作提出了较为合理的建议。
- 相关中文对照歌词
- Expectation
- The Congregation
- I'm Behind You
- There Is A Kingdom
- Rainbow Nation
- Numbers
- Live Fast, Die Young
- My Mathematical Mind
- Galaxy Of Emptiness
- 10,000 Witnesses
- 推荐网络例句
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A carrier gas such as nitrogen is directed through line 20 and valve 22 to connect with line 26 and mix with the gas sample.
如氮气之类的载体通过管线20和阀22引入,与管线26相通,与气体样品混合。
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But for the most part, knaves and parasites had the command of his fortune
然而支配他的家产的大多是恶棍和寄生虫。
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For he that is now called a prophet, in time past was called a seer.
他们就往天主的人所住的城里去了。