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A novel three-dimensional Zn(Ⅱ) coordination polymer, Zn3(C2H2N3)4(SiF6), has been synthesized under solvothermal condi......
The eccentric-gear can be used for variable speed transmission.But,due to the vibrations caused by variation of backlash......
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文章在对中国公共卫生发展状况进行回顾分析的基础上,探索了今后的发展方向。作者认为,经济体制改革之后,中国的公共卫生面临着新......
The New China International Exhibi- tion Center(NCIEC)is co-designed by Beijing Institute of Agricultural Design (BIAD)a......
Recently,the Ministry of Commerce announced international commodity center information of a number of countries.These ce......
To solve the multi-class fault diagnosis tasks, decision tree support vector machine (DTSVM), which combines SVM and dec......
研究了一类三次实自治系统细中心与局部临界周期分支问题.利用计算机代数系统Mathematica分别计算出了该实系统所对应的伴随复系统......
Recently the CAS Institute of Metal Research(IMR)has made progress in the research on the alkane dehydrogenation catalys......
针对一类拟三次系统的中心条件与极限环分支问题,首先通过适当的变换将系统的原点（或无穷远点）转化为原点,然后求出该系统原点的前18......
Urban freight transport is a very important part of the logistics chain. Creating the right conditions for the economic ......
A survey of language training centers (LTCs) in Dalian, China was conducted, to ascertain the strengths and weaknesses, ......
