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国内外研究进展    
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  research progress at home and abroad
    In this chapter, it describes the summarization of the preparation methods of the HTLcs, the type ofoxidants and the different catalytic systems of Baeyer-Villiger oxidation to make the research progress at home and abroad area.
    第一章在文献基础上归纳总结了类水滑石常用的制备方法、Baeyer-Villiger氧化反应氧化剂的类型和不同催化体系的作用特点及国内外研究进展,明确了研究的目标及内容。
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    The literature review pant of this thesis is about the formation and development of the ecological morals as well as the research progress at home and abroad, especially the significance of studying and carrying out the education of ecological morals.
    本文综述部分介绍了生态道德教育理论的形成和发展以及国内外研究进展,尤其强调了研究和实施生态道德教育的重要意义。
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    Research progress at home and abroad and structural character ofpasty propellant rocket engine were emphatically introduced.
    着重介绍膏体推进剂火箭发动机国内外研究进展及其结构特征。
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    On the base of research progress at home and abroad, the deficiency in present research and the development of FHA coating are stated.
    最后在综述国内外研究进展的基础上,提出了目前研究中存在的不足,并展望了FHA涂层今后的研究和发展趋势。
短句来源
  domestic and abroad study progress
    In order to study the influence of genetic factors on blood lipid,we reviewed the domestic and abroad study progress on the relationship between ApoB gene polymorphism and serum lipid metabolism in children in recent years.
    为了探讨遗传因素对血脂的影响,本文就apoB基因多态性与儿童血脂代谢的关系,对近年来国内外研究进展作一综述。
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  development at home and abroad
Typical existing methods of tunnel geological prediction include negative apparent velocity, horizontal seismic profile, and the Tunnel Seismic Prediction (TSP) method as this technology is under development at home and abroad.
      
We sincerely hope that government can use the recommendations to inform and shape its policies for sustainable development at home and abroad.
      
  其他


With spreading of the application of pyroelectric sensor, TGS family crystals with excellent pyroelectric properties are paid more attention. In this paper, we summarise the growth method, property modifying and application of TGS family crystals at home and abroad.

随着热释电传感器应用的不断扩大,具有优异热释电性能的TOS系列晶体的研究日益引起重视.本文将从TGS系列晶体的生长、改性及应用等方面,对其国内外研究进展加以简要概述.

The technique of continuous casting of single crystal metals (CCSC) is a new process to make wire.It has a characteristics of making a long metal wire with single crystal. In this paper,the current research progress and future application prospect of CCSC are reviewed all sidedly.

单晶连铸技术是一项新型金属型材制造技术.该技术的特点是可以制造无限长的单晶导电金属线材,为高保真通讯电缆的开发提供优质导体材料.本文对该技术的国内外研究进展及其开发应用前景进行全面评述.

The common methods characterizing chaotic system are briefly introduced in this paper. The most domestic and overseas advance in this filed are summarized, it is concluded that the main applications of chaos theory in hydroscience focused on hydrologic time series analysis and nonlinear prediction model. The most problems revealed in the past studies, such as delay time, data size, noise, are analyzed and discussed in this paper, so the hypothesis of chaotic character of hydroscience problems is reasonable....

The common methods characterizing chaotic system are briefly introduced in this paper. The most domestic and overseas advance in this filed are summarized, it is concluded that the main applications of chaos theory in hydroscience focused on hydrologic time series analysis and nonlinear prediction model. The most problems revealed in the past studies, such as delay time, data size, noise, are analyzed and discussed in this paper, so the hypothesis of chaotic character of hydroscience problems is reasonable. But as for any finite and noisy time series, it is almost impossible to determine strictly whether the phase-space is a determinate or stochastic system because whether pure stochastic or chaos is an ideal state of mathematics. Any observation achieved through single method may not be used as evidence of chaos in hydroscience problems, can only be regarded as chaotic character. Various ways should be employed to characterize chaos of hydroscience and define whichone, chaos or stochastic is dominating. Finally, we suggest that the fractal chaos dynamical system and the mean of combining chaos with neural net provide several new methods in the future studying.

在简要介绍表征系统混沌特征常用方法的基础上,认为混沌理论在水科学中的应用主要集中在水文时间序列性质的判定和非线性预测模型研究上,并就这两方面的国内外研究进展进行了综述。通过对其应用中存在的主要问题:延迟时间的确定、数据量大小、噪声等进行分析和讨论,认为水科学问题中混沌的假设是合理的。但对于任何有限长度和受噪声干扰的时间序列来说,严格判定其相空间是确定性系统还是随机系统几乎是不可能的,纯粹的混沌和纯粹的随机都只是数学上的一种理想状态。因此,对于所研究的水科学问题是否存在混沌现象,仅采用单一的方法所取得的结论,不能作为判定依据,而仅表明可能存在混沌特征。所以有必要采用多种研究方法,综合刻划某一水科学问题中的混沌迹象,判定该序列是以混沌成分为主还是以随机性成分为主。提出分形上的混沌动力系统以及混沌与神经网络相结合的方法,可为水科学问题的研究能提供一些新的思路。

 
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