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     Moreover, the fitting degree of curvilinear regression equation is tested by correlation index, in stead of correlation coefficient which has been unsuitably used for testing in similar works.
     此外,用相关指数来检验曲线回归方程的拟合程度,而不采用在类似的研究中用相关系数来检验曲线回归这一不合适的方法。
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     By analyzing the innovation scheme to recloser for Shaodong 110kV transmission line in Dongjiao Substation, a perfect solution to the recloser for 110kV line in similar power system operating conditions is proposed.
     通过对东郊站 110kV韶东线重合闸改造方案进行认真分析 ,提出一种在类似电力系统运行方式下110kV线路重合闸装置完善的解决方法。
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     The evaluation method can be used for reference in the assessment of geological hazards in similar cases.
     本文提出的评价方法在类似矿山不稳定边坡地质灾害危险性评估中具有参考和借鉴价值。
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     Finally, triaxial undrained shear tests show that the model can basically reflect the deformation of soils and is satisfied with application in similar condition.
     最后通过三轴不排水剪切试验对模型进行了检验 ,结果表明该模型反映了土体的变形特征 ,说明在类似条件下能较好的满足工程实际的要求 .
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     Through the comparison of LOGO and relay control,it's clear that LOGO control module has superiority and better price and application prospect in similar engineering.
     通过对LOGO与继电器控制进行比较,说明采用LOGO控制模块具有优越性和较好的价格比,以及在类似工程中应用前景。
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     Under similar conditions the regularities of synthesizing ZSM-5 zeolites with SiO_2/Al_2O_2_3 ratio over 100 have been studied.
     在类似条件下探讨了合成硅铝比(SiO_2/Al_2O_3)100以上ZSM-5分子筛的规律.
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     incubation were fibroblasts,HeLa, BEL-7402,Detroit-6,SGC-7901,MGC 80-3 and Os-732 respectively according to the amount of ~3H-HPD in cells.
     但在以后的24h 内,维持在类似的水平上。 7株细胞温育30min 摄入~3H-HPD 量,按多少顺序依次为成纤维细胞、HeLa、BEL-7402、Detroit-6、SGC-7901、MGC 80-3 及 Os-732;
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     Such elongation of bridge bond length has been observed also from the similar anions Cr_2Cl_9~(3-) and W_2Cl_9~(3-).
     在类似的双核配氯阴离子如Cr_2Cl_(9~(3-))与W_2Cl_(9~(3-)中,也存在有桥键的伸长。
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     13C spin-lattice relaxation times, T1, for (CH3CH20)2P(0)CH(CH2N02) (p-OCH3C6H4) were measured. There are differences between 13C spin-lattice relaxation in two ethyl groups because the chemical shift anisotropy made contributions to relaxation.
     测定了(CH_3CH_2O)_2P(O)CH(CH_2NO_2)(p-OCH_3C_6H_4)的_(13)C自旋一晶格弛豫时间T_1,二乙基~(13)C T_1间的差别,说明在类似化合物中,含有化学位移各向异性对弛豫的贡献。
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     It also contributes to promote modernized management of grouting projects, reduce grouting costs and increase grouting quality.
     可供在类似工程中进一步推广GIN法灌浆技术提供参考,为促进灌浆工程的现代化管理、降低灌浆成本,提高灌浆工程质量做出贡献。
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     However, like E.
     然而类似E.
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     pneumoniae.
     pneumoniae的类似.
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     Similar events emerged in endlessly in our country.
     我国类似事件也都层出不穷。
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     The technique can be popularized for use under similar conditions.
     类似条件下可以推广应用。
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In similar conditions, comparatively, chitosan, activated carbon and PAC could wash 90%, 82% and 92% of residual oil from WWOE, respectively.
      
Similar specific interactions between the two solvents and the active site of α-chymotrypsin were shown to result in similar kinetic effects.
      
It is established that the role of linear tension in similar criteria increases with the narrowing of the crack and becomes significant in nanocracks.
      
Some morphofunctional indices are worse in them than in similar cohorts in Central Russia.
      
At the same time, it is possible in similar structures to observe the kinematics of electron-hole pair generation at the periphery of the field electrode (the edge generation effect).
      
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A new iodine heterocycle, 3,6-dinitro-dibenzopyriodonium bisulfate (Ⅲa), prisms, m.p. 217.5° (dec.), was found to be readily prepared in 86% yield by treating 4,4'-dinitrodiphenylmethane with iodosyl sulfate, which was conveniently obtained by stirring a stoichiometric mixture of iodine and sodium iodate in concentrated sulfuric acid. The iodonium compound (Ⅲa) could be converted to the chloride (Ⅲb), colorless needles, m.p. 211.5° (dec), bromide (Ⅲc), yellowish needles. m.p. 217.5° (dec.), iodide (Ⅲd), yellow...

A new iodine heterocycle, 3,6-dinitro-dibenzopyriodonium bisulfate (Ⅲa), prisms, m.p. 217.5° (dec.), was found to be readily prepared in 86% yield by treating 4,4'-dinitrodiphenylmethane with iodosyl sulfate, which was conveniently obtained by stirring a stoichiometric mixture of iodine and sodium iodate in concentrated sulfuric acid. The iodonium compound (Ⅲa) could be converted to the chloride (Ⅲb), colorless needles, m.p. 211.5° (dec), bromide (Ⅲc), yellowish needles. m.p. 217.5° (dec.), iodide (Ⅲd), yellow powder, m.p. 164° (dec.) and picrate (Ⅲe), yellow needles, m.p. 183-184° (dec.) by treating its solution in formic acid with a 50% formic acid solution of sodium chloride, sodium bromide or potassium iodide or with an alcoholic solution of picric acid respectively. The structural formula (Ⅲ) of the new iodonium compounds was derived by means of potassium permanganate oxidation of the bisulfate (Ⅲa) to 2-iodo-4-nitrobenzoic acid, and by thermal decomposition of the iodide (Ⅲd) to 2,2'-diiodo-4, 4'-dinitro-diphenyl-methane (Ⅵ) (60% yield), m.p. 158-159°, the structure of which was shown by analysis and by comparison with what is known about the behavior of other iodonium iodides, e.g., 4,4'-dicarboethoxy-diphenylene iodonium iodide (Ⅷ), which decomposes on heating yielding 2,2'-diiodo-4,4'-dicarboethoxydiphenyl (Ⅸ). Compound (Ⅵ) could be reduced with tin and hydrochloric acid to a diamino compound (Ⅶ).The iodonium salt (Ⅲa) possessed the interesting property that when it was treated with dilute sodium hydroxide solution at room temperature with the addition of ethyl acetate or pyridine, a beautiful bluish-green color gradually developed in the organic layer. When it was heated with dry pyridine, the same color developed. The colored ethyl acetate solution changed to brownish yellow on acidification with dilute sulfuric acid and regained its bluish-green color when the acidified solution was made alkaline.Under similar conditions as described above, reaction between diphenylmethane and iodosyl sulfate gave a grayish substance, m.p. 210-212°, which was insoluble in common solvents. This substance was possibly a polymeric compound of formula (Ⅺ).

1.4,4'-二硝基二苯甲烷(Ⅰ)與硫酸亚碘醯(Ⅱ)作用,生成一种新型的含碘杂環化合物(Ⅲ_a)。 2.化合物Ⅲ_a與氯化鈉、溴化鈉、碘化鉀或苦味酸作用,置换成为相應的鹵化物(Ⅲ_(b-d))或苦味酸盐(Ⅲ_e)。 3.用鹼性高錳酸鉀溶液氧化化合物Ⅲ_a得2-碘代-4-硝基苯甲酸。 4.碘化物(Ⅲ_d)在它的熔點温度进行熱解,得2,2'-二碘代-4,4'-二硝基二苯甲烷。继还原,得相應的二氨基化合物。二者均为新化合物。 5.化合物Ⅲ_a用氢氧化鈉溶液处理,得到蓝绿色物質,溶於乙酸乙酯、丙酮、吡啶中成鲜明的蓝绿色溶液。乙酸乙酯溶液酸化後变成黄棕色,再鹼化復现蓝绿色。将化合物Ⅲ_a在无水吡啶中加熱,亦呈现蓝绿色。 6.在类似的条件下,二苯甲烷與硫酸亚碘醯起作用。

The fractionation, viscosity and light-scattering measurements for three types of polystyrene, i.e., atactic, isotactic and 1:1 mixture of the two, were studied. Noticeable differences in the [η]-M relationship, second virial coefficients A2 and mean square end-to-end distances were found among the three types of polystyrene samples. Conclusions about the solution properties of isotactic polystyrene suggested by Danusso and confirmed by Krigbaum were discussed.

本文报导了有规立构聚苯乙烯,无规立构聚苯乙烯和1∶1混合有规和无规立构聚苯乙烯的分级、粘度和光散射测试结果。发现上述三种聚苯乙烯试样的[η]-M的依赖关系、第二维利系数和均方末端距(当分子量相同时)是有差别的。这种差别超出实验误差范围,而作者们认为是合理的。从而讨论了前人在类似的工作中所得到的结果。

Considering the experimental methods used and results obtained by previous investigators on the preparation of silicon carbide by gaseous cracking, we have performed our experiments in a similar carbon plate resistance furnace in an atmosphere of hydrogen, argon or nitrogen at temperatures from 1400 to 2200℃. The vapor reacting agents used are either SiCl_4,CH_3SiCl-3, (CH_3)_3SiCl or the mixture of toluene and SiCl_4 or (CH_3)_3SiCl。Having examined carefully under polarising microscope, we revealed with no...

Considering the experimental methods used and results obtained by previous investigators on the preparation of silicon carbide by gaseous cracking, we have performed our experiments in a similar carbon plate resistance furnace in an atmosphere of hydrogen, argon or nitrogen at temperatures from 1400 to 2200℃. The vapor reacting agents used are either SiCl_4,CH_3SiCl-3, (CH_3)_3SiCl or the mixture of toluene and SiCl_4 or (CH_3)_3SiCl。Having examined carefully under polarising microscope, we revealed with no exception that all of the crystal grains of silicon carbide grown over the above-mentioned temperature range contain skeletons of alpha-silicon carbide platelets, with beta-silicon carbide forming a matrix. Intergrowth of the C planes of alpha-silicon carbide with beta-silicon carbide was observed. The twinning angles of the C planes in alpha-silicon carbide crystal were determined to be 37.3°and 70.2°By calculating the temperature dependence of the free energy change of the possible chemical reactions with SiCl_4 in silicon carbide formation, it has been shown that these reactions can be grouped into three catagories: (1) the decomposition of SiCl_4, (2) the decomposition of hydrocarbons or the syntheses of simple hydrocarbons, and (3) various possible reactions leading to silicon carbide formation. The reactions with methyl chlorosilanes as reacting agents have also been discussed.As a consequence of this investigation, the problem of controlling the crystalline modification during the synthesis of silicon carbide monocrystals by the gaseous cracking method is emphasized, and it is believed that the better solution of this problem would be of no less importance than to increase its crystal size or purity.

本文考虑了前人的研究条件和结果之后在类似的碳片炉内进行了裂化法合成碳化硅的实验,反应试剂为SiCl_4、CH_3SiCl_3、(CH_3)_3SiCl或SiCl_4及(CH_3)_3SiCl与甲苯的混合蒸气,气氛为H_2、Ar或N_2,温度为1400~2200℃。岩相法观察表明,在实验温度范围内制备的碳化硅晶粒内都包含α-SiC晶体的片状骨架,它们往往沿C画与β-SiC相间互生:α-SiC晶架的C面孪晶角为37.3°和70.2°;β-SiC则形成基体物质。 化学反应的自由能变化与温度的依赖关系的计算表明,裂化法的化学作用可以概括为以下三类:(1)SiCl_4的分解反应;(2)碳氢化合物的分解或简单碳氢化合物的介成反应;(3)各种可能合成碳化硅的反应。此外,也讨论了氯化硅烷反应剂系统的裂化反应。 根据实验结果,提出了裂化法生长β-SiC单晶的晶型控制问题,并认为解决这;一问题的重要性应不亚于晶体的大小与纯度。

 
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