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The main research content is: Using the experimental of cutting force and roughness of high speed face milling cutter and high speed end milling cutter mill aluminium alloy and cast iron, analyze the rules of the high speed milling velocity, feed rate per tooth, milling depth and milling width to high speed processing. Use multiple linear regression method, set up surface roughness and the cutting force fluctuation models. Certify the regression model notability, and provide a reliable guarantee for the accuracy of function optimization. Based on the targets of productivity, manufacturing cost, surface roughness, cutting force fluctuation optimization model, according to research of the high speed milling parameters selecting restrict of work piece, machine, tool and safety, set up high speed milling parameters multi-object optimization system.
本文以已有的高速铣削机理及高速刀具技术研究成果为基础,结合高速铣削试验,进行了基于遗传算法的高速铣削参数优化研究与系统开发,主要的研究内容为:通过高速面铣刀和高速立铣刀加工铝合金和铸铁等材料的切削力和表面粗糙度试验,进行了铣削速度、每齿进给量、铣削深度和铣削宽度对高速铣削加工过程影响的研究;采用多元线形回归的方法,建立了切削力及其振幅和表面粗糙度模型,并对模型的显著性进行验证,为高速铣削参数优化模型的建立奠定了基础。
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By systemic researching and simulating experiment, the text gains such results as follows,1. On the base of sufficiency research on the oil-gas hydrocarbon systemic chemistry composing and the physical chemistry characters, we traverse the mechanism of the paraffin's deposition. Then we consider that paraffin deposition is a complex process ofphysical chemistry, which includes more than one single mechanism.2. Traversing and comparing the literature in detail on different factors that has effect on paraffin deposition, the available experimental methods on paraffin deposition, prevention of paraffin deposition, and removing of the deposited paraffin on the spot.3. Ameliorated the laser equipment of solid particle inspecting system and the corresponding test methods. Determine WCT of dead oil and live oil from KS101 well under different pressure with this system. The result implies that dead oil has opposite regulation on paraffin deposition temperature to live oil.4. A vapor-liquid-solid envelop is drawn by superposition regular vapor-liquid envelop and WCT curve thereby explained that the departure and quick raising of the curve in the low temperature zone is caused by the appearance of paraffin in solid phase.5. Estimation is made to determine the depth of paraffin deposition in the well.
通过系统的研究和实验模拟,本文取得了以下研究成果:(1)在充分调研油气烃类体系的化学组成及其物理化学特征的基础上,详细研究了石蜡沉降的机理,认为石蜡沉积是一个复杂的物理化学过程,是多种机理共同作用的结果;(2)深入调研并综合阐述了影响石蜡固相沉积的各种主要因素,对目前国内外常用的有机固相沉积实验研究方法和现场清防蜡措施也做出详尽的描述,并加以对比评价;(3)改进了油气藏开发重点实验室自行研制组装的高温高压下测定固相沉积的激光装置和测试方法,并用该套设备测定出柯深101井的井口脱气油样和凝析气平衡油样不同压力下的析蜡点,实验结果表明,脱气油和平衡油析蜡规律相反;(4)将常规气-液两相相图和析蜡曲线叠加得到了气—液—固三相相图,从而解释了气-液两相等液量线在低温区域偏离正常并快速上翘是由于体系有石蜡固相出现;(5)利用实验测试的析蜡温度预测析蜡位置,表明只有在距井口465m油管以上会有蜡析出。
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Rice moisture content can be controlled by use of different consistency salt and acidliquor,the method of preparing different moisture contents rice sample also be studied and adopted.Such as, temperature humidity preservation box used in testing mechanical physical properties ofrice kernel, tensile and bending experiment device which can be used on rice samples. Configureddark box, CCD photography, image-taking system, pre-experiment to forcast mechanical physicalproperty and moisture transfer property, from which we can know that distance of elastic modulusand passion ratio in tensile process test is not big when renitency strength is much larger thanresist-pull strength, tensile test can be replaced by bending test to research tensile property ofrice, because tensile test is hard to do, experiment research methods and feasibility werediscussed, and suitable humid stress field experiment research plan ere made.
研究、采用了合适的盐溶液及不同浓度的酸溶液调节稻米含水率、制取不同含水率稻米试样的方法;研制了测量稻米材料机械物理特性时使用的保温保湿箱、适用于稻米试件使用的拉伸和弯曲试验装置;配置了暗箱、CCD摄像机、竖直与水平摄像装置及计算机图像采集系统等;进行稻米机械物理特性和水分传递特性的各种预备试验,得到:稻米的抗拉强度远小于抗压强度而拉压时的弹性模量、泊松比相差不大,稻米籽粒的拉伸试验难度极大,成功率很低,可以用籽粒的弯曲试验代替拉伸试验研究籽粒材料的拉伸特性;探讨试验研究方法及其可行性,制定了合理的稻米湿应力场试验研究方案。
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On the base of existent research, the researchful view, researchful means and researchful frame of the paper are put forward.
基于前人研究的基础上,提出了本文的研究视点、研究方法和研究框架。
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Studying the related theory to the atical first, for example .competing theory, parallel theory , city Risorgimento theory and so on, carries out qualitative analysis on development of Cheng Hua District again , basing the qualitative analysis apply the SPSS software to analyse the way studying Cheng Hua District on quantitative analysis , to work out corresponding way to improve chenghuas competing power.
目前,有大量的文章宋阐述区域竞争力,但是往往都是以国家竞争力或者是省域的竞争力作为研究对象的,选取的指标个数多,涉及到的方面都很广,本文集中在成都市的五大主要城区进行分析研究,首先研究与本文相关的理论基础,例如竞争理论,比较理论,城市复兴理论等,再对成华区的发展进行定性的分析,再定性分析的基础上,运用SPSS软件分析研究成华区在这几个城区当中区域竞争力的综合排名,进行定量分析,以便对制定相应的区域竞争力提升办法。
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In the preface, do mainly about the conditions of the research of the rococo style, and some relevant books, then figure out the weak about the research in our country, and illustrate the research's significance and methods.
在前言中,主要是浅谈了洛可可风格研究的国内外现状,以及相关的著作,并且指出了国内研究的薄弱环节,说明本文的研究意义和研究方法。
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This thesis is divided into four parts, first part one has explained the background of the research, puts forward to the problem of the thesis, thinking and method; The second part two has introduced the overview of northwest under developed area, and analyzed the characteristic of local university"s scientific research of northwest under developed area and the demand of young teachers; The third part, according to the current situation motivation of scientific research the young teachers of local university in Gansu as the individual case, carrying on comparative analysis to local university"s young teacher"s scientific research in Gansu Province; The forth part has combined the typical case - the current situation of Gansu Province, put forward the measures to the northwest under developed area that concerning the scientific research motivation for young teachers: Intensity of research funding of the young teachers should be moderate; Young teacher"s assessment of results should not give priority to symbolic achievements and patent for invention; the structure of graduation school the young teacher of local university should be optimized; It is necessary to strengthen the training of the scientific research of the young teachers;It is necessary to set up the teachers sabbatical leave system and improve the system of floating of teachers of local universities.
因此,本研究选择了甘肃地方高校青年教师的科研激励问题作为论文的个案,力图对西北欠发达地区地方高校青年教师的科研激励问题提出对策性建议。本研究共分为四部分,第一部分阐述了研究背景,梳理了相关的文献资料,提出研究的问题,思路和方法;第二部分首先介绍了西北欠发达地区概况,并对西北欠发达地区地方高校科研的特点及青年教师的需求特征进行了分析;第三部分由于甘肃地方高校青年教师科研激励现状在西北欠发达地区地方高校中具有典型性和代表性,以甘肃省地方高校青年教师科研激励现状为个案,对甘肃省地方高校青年教师科研激励措施进行了比较分析;第四部分结合个案——甘肃省地方高校青年教师科研激励的现状,提出西北欠发达地区地方高校青年教师科研激励问题的对策性思考:科研资助强度应适中;成果鉴定不宜以标志性成果和发明专利为主;优化地方高校青年教师学缘结构;加强地方高校青年教师的科研培训;建立学术假制度以及完善地方高校人才流动制度。
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The major purpose of this research was to explore the content and the functions of a web-based learning community for digital game designs. After literature reviewing, both website content analysis and questionnaires were adopted to construct the schematism of the web-based learning community.
中文摘要本研究旨在探讨数位游戏企划网路学习社群之内涵与功能,为达成研究目的,本研究采用文献探讨,针对数位游戏企划学习领域的内涵与特色、数位游戏企划人员专业能力发展、网路学习社群理念在各学习领域的相关应用等方面,搜集国内外相关理论与研究进行探讨。
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Research orientation: major in Chinese characters. Phonology and Scholium especially taking phonology as main orientation with an auxiliary study and collation, experienced at making use of computer to set up database for doing research on the ancient document materials with a wider new road.
科研方向:主要从事文字、音韵、训诂研究,尤以音韵、音义研究为主攻方向,辅之以传统语言文字学文献的整理和研究,在利用电脑建立数据库来处理和研究传世文献的材料方面,有独到的体会和经验,拓宽新路,有很多事情可做。
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Firstly, the paper introduces the existing conditions of application and research in our country, and they are still in the stage of familiar with and exploring construction methods. The research on design method of the secant pile is little.
首先,文章详细介绍了目前咬合桩结构设计理论和方法在我国的应用和研究情况,目前国内现在咬合桩技术的研究主要针对施工技术进行研究,针对咬合桩复合结构的设计方法的研究较少。
- 推荐网络例句
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She gently rebuff ed him, but agreed that they could be friends
她婉言拒绝了,但同意作为朋友相处。
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If in the penal farm, you were sure to be criticized.
要是在劳改农场,你等着挨绳子吧!
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Several theories about reigniting and extinguishing of the arc have been refered.
本文综合考虑了几种电弧重燃和熄灭理论。