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     New Technology of MIKRON'S Exhibits——Interview with Mikron on CIMT2001
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     Monitors Multitask at CeBIT 2004
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     Sawing Machines Exhibits at CIMT 2001
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     Present Situation,Trends & Policies of China’s Wood Industry Development
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     Highlights of Shanghai Industrial Fair
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     A total of 150 papers were read.
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In april, 1964, a meeting was summoned by the Peking Botanic Gardens, Research, In-stitute of Botany, Chinese academy of sciences, to discuss the various problems concerning the research project on improvement of grape varieties. Among other topics, the procedure and technique of grape breeding received a great deal of attention from those who attended that meeting. This paper attempts to present the results of discussion on this topic.

今年4月,中国科学院植物研究所北京植物园在北京召开了“葡萄品种选育的研究”专题第一次会议,讨论并制定了“葡萄杂交育种程序(草案)”。根据这个草案,从杂交到决选出预备新品种,在一般情况下,需时15至17年。会上对何时开始繁殖优良单株,对复选出来的优良单株和进行比较试验时观察测定的项目等问题,展开了热烈的争论,这些问题,关系到育种年代的长短,杂种苗各种经济性状的稳定程度,以及观察测定所需工作量的多少,是值得重视和继续探讨的问题。本文根据讨论结果,加以整理,供各地葡萄育种工作者的参考,并请提出修改补充的意见。

A series■a_n is said to be (Riemann) summable (R,k)(k≥1 being an integer)to the sum s,if the expression ■ converges in the neighbourhood of h=0 and tends to s as h→0. Let f(t)be a periodic function with period 2π,integrable(L)over(0,2π),and ■ The(R,k)means for ■[f] at x are ■ Lee has recently proved that if f■L(0,2π)has a simple discontinuity at a point x_0,the means R_k~k(f,x_0)does not show Gibb’s phenomenon at x_0. There exists however some mistakes in Lee’s argument.A correction of Lee’s proof is given in...

A series■a_n is said to be (Riemann) summable (R,k)(k≥1 being an integer)to the sum s,if the expression ■ converges in the neighbourhood of h=0 and tends to s as h→0. Let f(t)be a periodic function with period 2π,integrable(L)over(0,2π),and ■ The(R,k)means for ■[f] at x are ■ Lee has recently proved that if f■L(0,2π)has a simple discontinuity at a point x_0,the means R_k~k(f,x_0)does not show Gibb’s phenomenon at x_0. There exists however some mistakes in Lee’s argument.A correction of Lee’s proof is given in the present note. The second object of the present paper is to extend a theorem in [1] into the following form: If f■L(0,2π) and k≥1,then the Fourier series ■[f,x]is summable(R,k) to sum f(x) almost everywhere.

本文指出,李经熙在1978年全国数学会上报告的题为“用黎曼求和法(R,k)求和时的吉卜斯现象”的论文中的主要定理的证明是错误的.本文纠正了他的错误,给出了新的证明方法.其次把专著[1]中的关于几乎处处(R,k)求和的定理加以推广.

Coalbalis, as a special kind of concretions, have been widely found in coal seams of Carboniferous coal measures in Europe and North America. Their high scientific value lies in their retaining all the details of the structure of vegetables, which can serve to explain some botanical problems, including the origin,evolution and classification of fossil plants.Furthermore, the research into coalballs may offer some clues to understanding the coalification process.

第九届国际石炭纪地层及地质大会(IX-ICC)于1979年5月在美国依利诺依(Illinois)州Urbana召开。我院地质系田宝霖副教授做为中国地质学家代表团成员出席了会议,并在会上发表该论文。

 
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