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A summary of the live-line work on 500 kV transmission lines in China

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Electricity 1992年第4期 50-56页

作者： Li Hongren China Technical Centre of Live-line Work

According to the power system planning in China,500kV transmission line will be the trunks in all regionalnetworks except the Northwest China System.Due to short ofcapital resources,however,most of those 500 kV transmissionlines are and will be operating in single circuit for quite a long pe-riod of time.So,to use the live working techniques on 500 kVlines is an important problem for study.Actually,we had already begun our study on live workingon 500 kV transmission line several years prior to the

关键词： prior string suspension insulator Northwest worker length tower summary shielding

光滑函数类中一族无高阶导数的大范围收敛迭代法

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计算数学 1985年第1期 14-23页

作者：张建国兰州大学

The problem whether the iteration formula with the global convergence which does notneed to compute the second order derivative of the function can be found, raised in [7], issolved for f（x）∈C1（R1） in the present paper by using the methods of prior estimates andintroducing a parametric function. The main results are as follows: 1. For f（x）∈C1（R1）, the families of iteration formulas of the global convergence,without derivatives of higher order, are suggested in the following formxn+1=xn±|f（xn）|/|f’（xn）|+α（xn）|f（xn）|,（1）xn+1=xn-α|f（xn）|/（α-1）f’（xn）sgnf（x0）±（f’2（xn）αp（xn）|f（xn）|）,（2）xn+1=xn±|f（xn）f’（xn）|/f’2（xn）+1/2p（xn）|f（xn）|,（3）Where the real parameter a∈(0, 2] and the real parametric functions α（x）=α（f（x）,f’（x））（>0） and p（x）= p（f（x）, f,（x））（>0） with certain arbitrariness are continuous orpiecewise continuous. 2. The convergence order of the iteration sequence {xn} generated by （1）, （2） or （3）is 2 for a simple real zero of f（x）, and is 1 for a multiple zero.

关键词：光滑函数 iteration 类中高阶导数迭代法 compute parametric prior 迭代公式 estimates

CONNECTIVE TISSUE DISORDER

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China Medical Abstracts(Internal Medicine) 1996年第2期13卷 120-122页

RECONSTRUCTING MIDDLE-TIBET CLIMATE DURING THE LAST 600 YEARS BY DENDROCLIMATOLOGICAL METHOD

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Acta meteorologica Sinica 1990年第3期4卷 294-304页

作者：吴祥定湛绪志孙力程志刚 Institute of Geography Academia SinicaBeijing

Based on four tree-ring chronologies which was analyscd with appropriate collection and accurate dating in the middle Tibetan Plateau,an essential procedure on reconstruction of past climate has been pointed out in this paper.First,the response function of each dendrochronology has been built and used to estimate how ring-width growth responds to variations in monthly climatic change.Second,the climate factors which could be produced with different tree-ring series have been selected.Then,the transfer function equation,including a new set of orthogonal variables,can be used to reconstruct local past temperature or precipitation.It should be emphasized that prior growth has been considered in the relationship between climate factor and tree-ring chronology,Besides,some different periods for calibration and verification have been divided.And some statistics and other kinds of proxy data have been adopted as test approaches.As a result,the variations of air temperature during the last 600 years and precipitation during the last 340 years were reconstructed by combining the same types of tree-ring series in the middle Tibet.

关键词： Tibetan climatic Plateau proxy reconstruct season verification prior emphasized rainfall

Characteristics of the Earth-Resistivity Change Before the Jingtai Earthquake with Ms=6.2

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Earthquake Research in China 1994年第3期8卷 60-67页

作者： Du Xuebin,Zhao Hevun,Chen Baozhi and Guo HuiminSeismolcgical Institute of Lanzhou,SSB,Lanzhou 730000,China

The earth-resistivity change recorded before the Jingtai earthquake(EQ).with Ms=6.2 at 11 geoelectric stations within 400 km of the EQ was discussed in this paper,and the following conclusions are made:1) imminent variations of earth-resistivity prior to the EQ were recorded at the Wuwei,Dingxi and Shandan stations immediately before the EQ;2) the recordability of the imminent variations at a station was related to the active deep faults and the strongly active faults inside and outside the focal zone,and to the causative stress field as well;3) the temporal and spatial characteristics of the earth-resistivity change immediately before the EQ showed that the EQ was probably induced by the NNW direction stress field(or by another one of similar direction)which was greatly increased during a short period immediately before the EQ and that the northern wall of the focal fault played a major role in the process of the EQ preparation and occurrence of the EQ.

关键词： epicenter resistivity immediately probably moderate prior conclusions situated strike record

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外交部发言人1993年12月2日答记者问

中华人民共和国国务院公报 1993年第31期 1541-1542页

问:美国贸易代表坎特称,美将把中国列入特别301条款的主要观察对象名单(prior-ity Watch list),因为中国违反了保护知识产权的协议。中方对此有何反应?答:自中美两国于1992年1月17日签订保护知识产权谅解备忘录以来,中国始终严格履行备... 详细信息

问:美国贸易代表坎特称,美将把中国列入特别301条款的主要观察对象名单(prior-ity Watch list),因为中国违反了保护知识产权的协议。中方对此有何反应?答:自中美两国于1992年1月17日签订保护知识产权谅解备忘录以来,中国始终严格履行备忘录项下的各项义务,加入了世界版权公约、保护文学和艺术作品的伯尔尼公约、保护录音制品的日内瓦公约以及专利合作条约;还根据有关国际公约的规定。

关键词：录音制品外交部发言人伯尔尼公约日内瓦公约专利合作条约艺术作品 prior 观察对象两国关系中英关系

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谈谈英语中含有比较级和最高级意义的形容词

兰州商学院学报 1990年第2期6卷 22-24页

作者：田定远

英语中大多数形容词都有原级、比较级和最高级三种形式.它们分别用于各种不同的表示比较的结构中.用as+原级+as表示人或物在某一方面有相同的特性,用比较级形式+than表示人或事物在某一方面的差别,用最高级形式表示在三个以上人或物中... 详细信息

英语中大多数形容词都有原级、比较级和最高级三种形式.它们分别用于各种不同的表示比较的结构中.用as+原级+as表示人或物在某一方面有相同的特性,用比较级形式+than表示人或事物在某一方面的差别,用最高级形式表示在三个以上人或物中其中一个“最……”的意义.在学习和教学实践中,我们还发现,另有一些形容词,它们本身就含有某些普通形容词比较级和最高级的意义,因而几乎没有相应的比较级形式和最高级形式.虽然这些形容词数量不多,但学习研究它们,对我们扩大词汇、掌握语法和丰富表达方法是很有益处的.

关键词：比较结构原级在三 closer Perfect goods prior greatest branches sports

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词义上的比较级

湖南人文科技学院学报 1990年第1期17卷 106-108页

作者：邓永桂

英语中形容词和副词词尾加“er”或前面加“more”就构成比较级,这个大家都很熟悉。此外,英语中还有某些词或词组,它们既没有加“er”,也没有加“more”,但在语意上也表示比较,我们把这种现象叫作词义上的比较级Lexical comparative deg... 详细信息

英语中形容词和副词词尾加“er”或前面加“more”就构成比较级,这个大家都很熟悉。此外,英语中还有某些词或词组,它们既没有加“er”,也没有加“more”,但在语意上也表示比较,我们把这种现象叫作词义上的比较级Lexical comparative degree。了解和掌握词义上的比较级对于英语学习来说是大有裨益的。本文就形容词词组和动词本身表示比较作初步的探讨。

关键词：形容词词组比较意义 comparative disadvantages mother senior prefer inferior prior shoes

APPROXIMATION AND ITS OPTIMAL ERROR ESTIMATE OF DISPLACEMENT OF TWO-PHASE INCOMPRESSIBLE FLOW BY MIXED FINITE ELEMENT AND A MODIFIED METHOD OF CHARACTERISTICS

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Chinese Science Bulletin 1990年第20期35卷 1686-1689页

作者：羊丹平 Department of Mathematics Shandong University Jinan 250100 PRC

Ⅰ. INTRODUCTIONThe displacement of one incompressible fluid by another in porous media has very important significance in engineering and production. In recent years Profs. J. Douglas, Jr., R. E. Ewing and Yuan Yirang and others proposed a kind of numerical simulation on the basis of combining mixed finite dement procedures with a modified method of

关键词： two-phase flow mixed finite element characteristics prior error estimate.