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     XRD shows d(001) value of modified bentonite has increased from 1.5286 nm to 2.1567 nm, TG-DTA, and FT-IR prove organic modifiers have entered into the interlayers of the bentonites. A hydrophobic and lipophilic analysis of the modified bentonites was made.
     XRD分析表明改性土的d(001)值从膨润土原土的1.5286nm增大到2.1567nm,TG-DTA、FT-IR等方法均证明有机改性剂已进入膨润土的层间,并对改性后的有机膨润土进行了疏水亲油性分析。
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     In view of the above,it is thought that Southwest China and Indian-Burmese area have entered into the Fifth(V) active period,which will continue until around 2000 and the earthquake with about M 8 may occur in the border area between China and Burma from Myitkyna in the northeast of Burma to Gongshan and Bijiang during the period.
     据此分析认为该区已进入第V活跃期,此活跃期将持续到2000年前后,在该时段内缅甸东北部密支那至贡山,碧江的中缅交界可能发生8级左右的地震。
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     At presont,the growth rate of M\-1 and M\-2 have entered into the appropriate area,but the overall money supply of M\-2 still needs the proper growth.
     当前 ,M1 ,M0 的增长率已进入适度区间 ,但货币总量M2 的供应量还要适度增加。
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     With the development of the computer technology, Information processing technology and communication technology, the production and management of electric power industry have entered into information era.
     随着计算机技术,信息处理技术和通讯技术的发展,电力工业生产和管理已进入了信息时代。
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     Up to now human beings have entered into Network Economy Era (NEE) based on computer network and communication technology.
     如今,人类社会已进入以计算机、网络、通讯技术为依托的网络经济时代。
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     In the 21st century, human beings have entered into the knowledge economy times, and modern educational technology have become the important tool of educational revolution.
     21世纪,人类已经进入了知识经济时代,现代教育技术已成为教育革命性的重要工具.
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     The source rock intervals have entered into oil window much late in the geological history, and with a higher expulsion efficiency of petroleum. The several reservoir intervals, such as O_1, C_1b, C_(1-2)k, k,C_2x and P_2, etc. , were sealed by a regional cap rocks of Aertashi Formation (E_1a) in Eogene.
     烃源岩晚期成熟,石油排运充分,阿尔塔什组区域盖层封盖,多套储集层段(Q_1、C_1b、C_(1-2)k、C_2x、P_2)等构成了麦盖提斜坡有利的石油成藏条件。
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     After going through the stages of operation management and running management, hospitals in our country have entered into a period of strategic management.
     我国医院在经历了作业管理、经营管理阶段之后 ,现已步入战略管理时代。
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     Accompanying with the globalization, mankind have entered into the21st century.
     伴随着全球化进程,人类跨入了21世纪。
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     At present, coals of the Eocene Pinghu formation have entered into the best epoch of pool - formed, it made a greater contribution to oil - formed.
     提出始新统平湖组煤是重要的烃源岩,目前斜坡地区始新统平湖组煤正处于油藏形成的最佳期,斜坡所产原油有它的重要贡献。
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     The human beings have entered the age of network.
     人类已经进入网络时代。
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     We have entered the post-modern world.
     我们进入了“后现代”世界。
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     We have entered into the information society and net era.
     现代社会已经进入信息社会、网络时代。
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     Nowadays, human beings have entered into the network age.
     当今,人类已经进入了网络时代。
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During the last decade, an increasing number of firms have entered into alliances with other firms within the same industry, as well as within other industries.
      
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We have entered into a new era of medical achievement with the development of successful transplantation of human organs.
      
Provenance studies can tell us which sources of lithic raw material were used in the past, but can they tell us why? After all, many factors can have entered into a person's choice to use one source rather than another.
      
137) invitation to 'climate scientists to take part in such discussions: in a sense, to (re)consider the scientific and implicit social and policy commitments they have entered into through pursuit of a particular scientific research programme'.
      
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The finite element analysis is a powerful tool for the elastic-plastic struetures. But the change of the elements of global stiffness matrix requires the repeat computations in the solution of equilibrium equations for the elastic-plastic finite element analysis of structures during each increase of loading. This requires also a lot of computing efforts and expensive costs. Some techniques, such as substruct-uring method and method of updating matrix were proposed by s^nie investigators in order to overcome...

The finite element analysis is a powerful tool for the elastic-plastic struetures. But the change of the elements of global stiffness matrix requires the repeat computations in the solution of equilibrium equations for the elastic-plastic finite element analysis of structures during each increase of loading. This requires also a lot of computing efforts and expensive costs. Some techniques, such as substruct-uring method and method of updating matrix were proposed by s^nie investigators in order to overcome these shortages. These techniques up to date were only used in treating the elastic-plastic analysis of trusses, frames, plane stress problems and axisymmetric problems. The complication of thin shell structures makes the complication of elastic plastic finite element analysis of thin elastic-plastic structures. Besides the save of computing time in the solution of equilibrium equations, the save of computing effort and guarantee of enough accuracy of elastic-plastic finite element analysis of shell structures are required. The quasi-conforming elements and layered subelement model are used. The global stiffness matrix of each individual shell is assembled in blocks. The system of statically equilibrium equations are solved by the forward-backward sequence modification approach in Gauss elimination method. These elements have the advantages of simpler formulation, better convergence, less computing time and satisfying rigid body displacement modes, while the forward-backward sequence modification approach in blocks are used to restrict the solution of statically equilibrium equations in the plastic zones during each increase of loading, i. e. the modification of these elements of global stiffness matrix are only required, these elements reflect the parts of shell have entered into plastic zones. The idea of so-called quasi-substruc-turing technique is introduced in present paper, i. e. the individual shells are assembled at the intersection line between shells. The intersection line is discre-tized into finite number of points. The flexibility matrices connecting the interactive generalized forces and generalized strains of each individual shell can be found by solving their statically equilibrium equations by assuming the unit forces at these points with the forward-backward sequence modificationiapproach in blocks. The generalized interactive forces at these points are found by the compatibility conditions and statically equilibrium conditions at these points and the equilibrium equations of individual shells. Finally, the generalized displacements, generalized strains of each individual shell can be found by superposition. All these save a lot of core memory, also guarantee the computing accuracy. The corresponding computer program was compiled with FORTRAN 77.For the purpose of checking the above formulation, at first, the numerical example of elastic-plastic analysis of circular cylindrical shells under hydrostatic pressure were computed and compared with the analytic results and experimental results by authors.As an example of shell structure problem, the elastic-plastic analysis of tubular T-joints of offshore drilling platform with branch tube under axial compression and corresponding experiments were carried out by us. The computing results are compared not only with our experimental results (elastic-plastic), and also with previous computed results and experimental results (elastic). All these computing results are quite close to the experimental results. These show that the present method is feasible. This provides a new way for the clastic-plastic analysis of thin shell structures and worth for practical purposes.

为着节省计算时间与费用而同时又保证计算结果的精度,本文采用拟协调元、分层子单元模型导出了圆柱薄壳弹-塑性有限元分析的列式,并用拟子结构法处理两个以上薄壳组成的结构,按分块方式形成各独立拟子结构的结构刚度矩阵,然后用分块顺序-逆序修正法求解,得到薄壳结构的广义位移增量,广义应变增量,广义力增量。从而通过叠加求得薄壳各单元的广义应变与广义力。 为了验证上述分析,作者用Fortran 77语言编制了相应的计算机程序,对支管在轴向力作用下的T型管状接头进行了弹-塑性计算,并作了相应的实验研究以资比较,取得了较好的一致性,从而为薄壳结构的弹-塑性分析提供了一个有效的手段。

This paper is a simple review of nonconventional bonding, including thebackground of its appearance and development, principal bonding metho-ds, international research achievements, problems and developing trends.The acid activation system and oxident activation system, the system ofself-converting chemical constitution of ligno-cellulose meterial and othernonconventional bonding systems are described. The research work in thisfield started at the beginning of 80's in China. There are several non-conventional...

This paper is a simple review of nonconventional bonding, including thebackground of its appearance and development, principal bonding metho-ds, international research achievements, problems and developing trends.The acid activation system and oxident activation system, the system ofself-converting chemical constitution of ligno-cellulose meterial and othernonconventional bonding systems are described. The research work in thisfield started at the beginning of 80's in China. There are several non-conventional bonding without using any glue, bonding with molasses orsulphite liquod (SSL) as additive to produce weathering qualityboard. The raw material includes bagasse, pine, aspen, basswood etc, some ofthem have entered into the pilot stage. An explosive process to producequality pulp using aspen and eucalyptus as raw material has been alsotested. China is plentiful in agriculture residues and waste products su-itable to be converted into board by the method with nonconventionalbonding. The variety of nonconventional bonding is also just suitable tothe development under the condition with different resource and geographyin the vast expanse of land in China.

本文扼要地介绍了非传统胶合的发展背景、基本概念、主要形式和国内外的研究现状。作者还展望了非传统胶合研究的发展前景。

According to the study on reproduction of Fl,F2 and F3 generations of plateau pika (Ochotona curzoniae)domesticated in laboratory, the features of that pika have entered into reproduction, the main conclusions of the study are summarized as follows:

本文对高原鼠兔在实验室条件下的繁殖进行了研究。结果表明,鼠兔是诱导性排卵动物,妊娠期平均为22.5天,每年平均繁殖3.4胎,每胎平均产仔4.8只,产后有发情的特点,生育期主要在性成熟后至2.5岁之间。雄鼠兔进人繁殖期的鉴别,可根据能否从体表鼠鼷部触摸到附睾尾进行判断。雌鼠兔的发情,可依据其乳房大小、外阴状况、交配试情和阴道涂片观察等进行综合判断。

 
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