专门研究
- 与 专门研究 相关的网络例句 [注:此内容来源于网络,仅供参考]
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Although over these years many scholars have done a lot of significant work, almost nobody studies the construction of schemata systematically and specially, especially they hardly deal with the conformity of reading teaching and information technology.
关于图式理论对高中英语阅读教学的指导作用的研究,许多学者已做了大量卓有成效的工作并且为图式的构建提出了许多行之有效的方案。不过,他们中很少有人就图式的构建这一实践问题做全面系统而且专门的研究,尤其是关于阅读教学与信息技术的整合涉及的较少。
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AMITA Institute for Sustainable Economies Co, Ltd is a socially responsible research institute in Japan that provides consulting and research services for businesses in agriculture, forestry and fisheries with the aim to reform modern techniques into sustainable systems.
AMITA可持续经济研究所有限公司是一家在日本的负社会负责的研究机构,专门为农林渔业提供咨询及研究服务,其目标是将现代科技改造成可持续系统。
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On research subject, author audaciously presents the most controversial and sensitive question, including: the basic theory of the state immunity, the sources of the law of state immunity, the nature of state immunity and its relation with adjudicatory jurisdiction, exceptions to the state immunity, immunity of heads of the state, etc.
鉴于国内已经有学者对国家豁免的问题进行了专门的论述,作者试图在研究对象和方法上有所创新,在研究对象上,作者勇于触及该领域最具争议的敏感问题。
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In a related study, a group of University of California, Los Angeles, researchers are hunting specifically for the cancer cells in body cavity fluids .
在一项相关的研究中,加州大学洛杉矶分校的研究人员正在专门寻找腔内液体中的癌细胞。
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From surveying the advance-booking of our country"s commercial housing, analyzing the mortgage in Hong Kong"s law, researching the present situation and perspective of our country"s mortgage practice, studying specially the discrimination between mortgage and charge as well as pledge, the author deduces that guarantee object of advance-booking of commercial housing is the reversionary right, and the advance-booking of commercial housing should be classified into the cessionary guarantee system in expectation of benefit to the legislation of our country"s property right law.
本文从对我国商品房预售概述和香港法上的按揭分析、从我国按揭实务现状及问题透视的研究、从按揭与抵押、质押的区别作了专门的研究,认为商品房预售按揭的担保标的物是期待权、商品房预售按揭应归于让与担保制度范畴的结论,以期对我国物权法的立法有所裨益。
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During the years of 2 041 ~ 2 049 ,the Korean pine broad-leaved forest would become the climax forest community in this area,with an area around 13 120 ~ 13 242 hm2 if taking selective cutting as the prevailing harvesting method.
这种地带性顶极群落在未来的森林经营利用中能否存在,许多学者进行了专门的研究。徐化成等[24]对红松阔叶林的特点、分布规律、动态、经营措施等进行了详细的研究,为红松阔叶林的经营利
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The key of longwall mining along strike safely and efficiently is efficacious controlling of surrounding rock, and the difficult points of surrounding rock controlling are dynamic stability of system "R-S-F" has be made clear by the facts from site test, experimental study and theoretical analysis, and three patterns may cause system "R-S-F" destabilization, such as dislocation, consequentiality and retrogradation among R, S and F in the process of longwall face advancing is put forward in the paper .
大倾角煤层走向长壁工作面开采方法与装备研究由于其矿压显现和围岩破断活动的复杂性而进展缓慢,较少见到国外主要产煤国家此方面的专门文献,我国目前的研究、试验与使用水平处于国际该领域的前沿。
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The effect of tribology factors on bearing vibration is studied experimentally. AR model and WPT are used to processing the normal arid abnormal signals. The results are as follows:1. The vibration of ball bearings is caused by the tribology action of contact pairs of ball and ring races and has the essential of tribo-dynamics. Any factors affecting the tribology characteristics of contact pairs will affect vibration and noise of bearings consequently.2. Vibration characteristics of bearing keep almostly unchanged with the increasing of axial load expecting the increasing of nature frequencies. When radial load increasing with axial load unchanged, nature frequencies keep unchanged but some new vibration peaks appears in the spectrum.3. Vibration amplitudes are damped and nature frequency are enhanced with sufficient lubrication. Vibration and noise of bearings increase obviously and roar can happen and the contact surfaces scratch slightly under insufficient and unclean lubrication state. Bearing will be disabled in a few minutes without any lubrication.4. Bearing vibration is unstable under low speed. With the speed increasing, the vibration become stable and natural frequencies increase slightly but the amplitudes increase apparently.5. Bearing vibration can be excited only by some harmonics ofwaviness without lubrication and by all harmonics with lubrication based on the theoretical analysis.6. The nature frequencies of ball bearings decrease with the increasing sizes. When international clearance increasing, nature frequencies decrease in radial and increase in axial and angular and the amplitudes increase in radial and decrease in axial and angular. When the number of balls increasing, nature frequencies increase and amplitudes decrease. When the pitch diameter increasing, axial nature frequency increase and others nearly keep no change. When outer race groove curvature radius increasing, nature frequencies increase in radial and decrease in axial and angular and amplitudes keep no change in radial and increase in axial and angular. When inner race groove curvature radius increasing, nature frequencies decrease and amplitudes increase.7. The distortion in amplitude and frequency components of bearing vibration signals picked up by the present probe measurement method is founded and right conclusions cannot be achieved by the signals. When accelerometer is rigidly screwed with steel stud onto a flat outer surface of a ball bearing, vibration signal can be got without distortion and the reliability of research on bearing vibration is assured.8. AR model is suitable for large samples of bearing vibration signals, square root of length of samples can be used as the upper limitation of order determination and the FPE order selection criterion is effective. Many advantages of AR spectrum are founded over the classical based on FFT.9. Time-Frequency analysis is necessary for abnormal noise of ball bearings. WPT overcomes the principle shortcomings of STFT and proved to be a best tool to process the abnormal signals.
理论分析和试验研究表明: 1球轴承振动是钢球—滚道接触副中的各种摩擦学作用引起的,具有摩擦动力学的本质,任何对接触副的摩擦学特性有影响的因素都将对球轴承的振动和噪声特性产生影响; 2中心轴向载荷作用下,载荷增大使球轴承的固有振动频率升高,载荷越大同样的载荷增幅引起的频率升幅减小,足够大的中心轴向载荷作用下载荷的变化对球轴承振动的频率特性不会产生明显的影响; 3轴向和径向联合载荷作用下,径向载荷不大时球轴承振动的固有频率基本不变,但是可能引起变刚度激励的非线性振动,出现新的频峰,过大的径向载荷将使部分钢球脱离接触,使球轴承的振动和噪声呈现不稳定状态; 4润滑对球轴承的振动和噪声特性有重要的影响,良好的润滑对振动有明显的抑制作用,润滑不充分时,振动和噪声的水平会有明显增高,一定条件下还会激发接触副中的谐振,发出啸声,造成接触表面的伤害,无润滑干接触时,短时的运转就会损伤接触副表面,使振动和噪声迅速增大,并随时可能引发严重的磨损和卡滞失效;接触副润滑良好时,油膜的"刚化效应"使球轴承振动的固有频率有所提高,润滑剂中含有弥散性污浊时,振动的幅度总体升高,但弥散性污浊不会改变球轴承振动的频率特性;浙江大学博士学位论文:球轴承振动的研究 5低速时,球轴承振动的基本特征呈现不稳定状态,随着转速的提高,球轴承振动的频率特性趋于稳定,固有频率频峰升高; 6理论分析表明,干接触时钢球和滚道表面波纹度的某些谐波分量能激励球轴承的振动,振动的幅值与谐波幅值成正比,实际球轴承中钢球的分布不可能完全均匀,波纹度的激励作用会随时发生;润滑接触的分析表明,波纹度的任意谐波分量均能激励球轴承的振动; 7球轴承的几何和结构参数分析表明,球轴承尺寸越大,径向、轴向和角振动的固有频率越低;钢球中心圆直径增大,球轴承的径向和轴向振动的固有频率基本不变,角振动的固有频率有所上升,振动的幅频特性基本不变;径向游隙加大使球轴承的径向振动固有频率降低,轴向和角振动的固有频率有所升高,径向振动幅频特性的幅值升高,而轴向和角向降低;钢球的数量增多使球轴承振动的固有频率上升,幅频特性的幅值下降,径向振动的幅值下降最为明显;外圈沟曲率半径系数增大使球轴承径向振动的固有频率升高,轴向和角振动的固有频率降低,径向幅频特性基本不变,轴向和角向幅频特性幅值升高;内圈沟曲率半径系数增大使径向、轴向和角振动固有频率均下降,振动幅频特性的幅值均有升高; 8试验对比表明,传感器采用探针式安装时,由于探针接触副接触特性的影响,钡(量得到的球轴承振动信号有失真,采用专门设计和制作的试验球轴承,以固定式安装加速度计,首次测量得到了球轴承振动的真实信号,通过对振动信号的分析,验证了球轴承振动的理论模型; 9)基于时间序列分析的AR模型适用于大样本球轴承振动信号的分析,以样本长度的均方根值作定阶上界,FPE做判阶准则,给出的AR谱光滑,频率分辨率高,是球轴承振动分析的简便而可靠的手段; 10以时频域分析的小波包变换分析球轴承异音信号能够比较好地定位和聚焦异音发生的时间,时间间隔,频率范围,同样是球轴承振动分析的可靠的手段,可用作球轴承故障诊断技术。
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He acted as an advisor for the Cenozoic Laboratory,Geological Survey of China,the first institution established for studying paleoanthropology in China since its establishment. He was one of the two chief authors of Fossil Man in China ,the first paleoanthropological book printed in China. He not only has great achievements in the study of Cenozoic stratigraphy,Paleolithic archaeology and mammalian fossils of China but also made important contributions in planning the excavation at Zhoukoudian. He worked in China for nearly 20 years,which makes him unparalleled among foreign paleoanthropologists.
从中国第一家专门为进行古人类学研究而建立的学术机构--中国地质调查所新生代研究室1929年成立之时起,他便任顾问;他是在中国出版的第一本关于古人类学的专著《中国原人史要》的两位主要执笔人之一;他不仅在中国新生代地层和哺乳动物的研究上卓有建树,而且在旧石器考古和周口店的发掘工作方面都有不小的贡献;他是为中国广义的古人类学工作时间最长的外国专家,为之付出了近20年的辛劳。
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In the 1980-s the Inkerman Winery was set up a scientific research laboratory to explore wine peculiarities and create new marks. Today an assortment of TM INKERMAN has got 35 marks of high quality wines: dry, semi-dry, semi-sweet, fortified and dessert.
在20世纪80年代,因特曼酒厂专门设立了科学研究实验室去研究酒的特殊性,并且创立了一些新的标签,今天,从因特曼的酒的分类来看已达到35个标签之多,干,半干,半甜以及甜酒第众多分类。。
- 推荐网络例句
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In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.
。但是,在否定句或疑问句里,这种带有"do"的方法表达的效果却没有什么强调的意思。
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Go down on one's knees;kneel down
屈膝跪下。。。下跪祈祷
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Nusa lembongan : Bali's sister island, coral and sand beaches, crystal clear water, surfing.
Nusa Dua :豪华度假村,冲浪和潜水,沙滩,水晶般晶莹剔透的水,网络冲浪。