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Optimization of control parameters for petroleum waste composting

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Journal of Environmental Sciences 2001年第4期13卷 385-390页

作者： MA Ying ZHANG Jia yao WONG Ming Hung wu wen zhong Department of Biology and Institute for Natural Resource and Waste Management Hong Kong Baptist UniversityKowloon TongHong KongChina Department of Environmental Science Wuhan UniversityWuhan 430072China State Key Laboratory for Freshwater Ecology and Biotechnology Institute of HydrobiologyChinese Academy of SciencesWuhan 430072China

Composting is being widely employed in the treatment of petroleum waste. The purpose of this study was to find the optimum control parameters for petroleum waste in-vessel composting. Various physical and chemical parameters were monitored to evaluate their influence on the microbial communities present in composting. The CO2 evolution and the number of microorganisms were measured as the activity of composting. The results demonstrated that the optimum temperature, pH and moisture content were 56.5 - 59.5 degreesC, 7.0 - 8.5 and 55 % - 60%, respectively. Under the optimum conditions, the removal efficiency of petroleum hydrocarbon reached 83.29% after 30 days composting.

关键词： optimization control parameters petroleum waste composting

Polarization of M2 Line Emitted Following Electron-Impact Excitation of Beryllium-Like Ions

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Chinese Physics Letters 2013年第6期30卷 85-89页

作者： SHI Ying-Long DONG Chen-zhong MA Xiao-Yun wu zhong-wen XIE Lu-You FRITZSCHE Stephan Key Laboratory of Atomic and Molecular Physics&Functional Materials of Gansu Province College of Physics and Electronic EngineeringNorthwest Normal UniversityLanzhou 730070 College of Physics and Information Science Tianshui Normal UniversityTianshui 741001 Helmholtz-Institut Jena Froelstieg 3Jena D-07743Germany and Theoretisch-Physikalisches InstitutFriedrich-Schiller-Universitat JenaMax-Wien-Platz 1Jena D-07743Germany

Detailed calculations are carried out for the electron-impact excitation cross sections from the ground state to the individual magnetic sublevels of the 1s2s^(2)2p^(3)/2 J=2 excited state of highly-charged beryllium-like ions by using a fully relativistic distorted-wave(RDW)*** contributions of the Breit interaction to the linear polarization of the 1s2s^(2)2p^(3)/2 J=2→1s22s2 J=0 magnetic quadrupole(M2)line are investigated systematically for the beryllium isoelectronic sequence with 42≤Z≤*** is found that the Breit interaction depolarizes significantly the linear polarization of the M2 fluorescence radiation and that these depolarization effects increase as the incident electron energy and/or the atomic number is enlarged.

关键词： method. Polarization Electron

Crystallization Kinetics and Melting Behavior of PA1010/Ether-based TPU Blends

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Chemical Research in Chinese Universities 2007年第3期23卷 370-373页

作者： ZHANG Shu-ling ZHAO Yan SUN Xiao-bo JIANG Zhen-hua wu zhong-wen WANG Gui-Bin Alan G. MacDiarmid Lab. College of Chemistry Jilin University Changchun 130012 P. R. China

Polyamide 1010 （PA1010）/thermoplastie poly （ether urethane） elastomer （ether-based TPU） blends were prepared via melt extrusion. The crystallization kinetics and melting behavior of PA1010/ether-based TPU blends were systematically investigated using differential scanning calorimetry. The crystallization kinetics results show that the addition of ether-based TPU hinders the crystallization of PA1010, and the hindrance effect increases with the increase of the concentration of ether-based TPU. Both pure PA1010 and PA1010/ether-based TPU blends exhibit double melting peaks in the process of nonisothermal crystallization. The double melting peaks change differently with the variation of cooling rate and blend composition. The cooling rate only influences the lower melting peak; however, the blend composition influences not only the lower melting peak but also the higher melting peak. The reason for the phenomenon must be the interaction between the two compositions.

关键词： Kinetics Melting point Nylon TPU Differential scanning calorimetry(DSC)

Smart Phones——A New Platform for Language Learning

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海外英语 2013年第1X期 73-74页

作者： wu wen-zhong WANG Na Hubei Normal University

Smart phones are a kind of phone installed with a corresponding open operating system that can make a phone work like a *** and more students are showing their dependence on *** on the smart phone platform,we can design many kinds of applicants for our phones that generate these suggestions,exploit a distant learning for M-learning on smart *** is a good way for people to learn a language and we should make good use of it.

关键词： Smart phone language learning exploitation

Syntheses of Novel Macrocyclic Polyarylate Oligomers Based on Phenolphthalein and m-Phthaloyl dichloride

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Chemical Research in Chinese Universities 1999年第4期15卷 350-353页

作者： GAO Jun-bo WANG Jun-zuo SUN Hui LI Ke ZHANG Wan-jin CHEN Chun-hai wu zhong-wen JI Yi-ping Department of Chemistry Jilin UniverstryChangchun 130023P.R.China Changchun Institute of Applied Chemistry Chinese Academy of SciencesChangchun 130021P.R.China

Novel macrocyclic oligomers were synthesized through the condensation of phenolphthalein and m phthaloyl dichloride with triethylamine as catalyst in the mixed solution of methylene chloride and THF via pseudo high dilution technique. The oligomers were characterized by IR, 1H NMR , MS, WAXD, TGA and DSC. It was found that the 3∶3 adduct(molar ratio of phenolphthalein to m phthaloyl dichloride) and the 4∶4 adduct were the main products and there was a small amount of crystalline in the macrocyclic mixtures. When the mixtures were heated to 360 ℃ , the crystalline disappeared.

关键词： macrocyclic oligomer pseudo high dilution technique polycondensation ring opening polymerization thermal behavior.

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优化地铁站台气流分布对通风效果的改进作用

天津大学学报 2008年第11期41卷 1377-1382页

作者：吴文忠由世俊天津大学环境科学与工程学院天津300072

为提高某地铁站台通风效果,建立了气流运动的数学模型,模拟气流分布,分析了气体流动的计划时间、留置时间和绕行时间对空气龄的影响,通过增加吊顶送风、隧道送风或者串联隧道送风和站台排风的方法优化气流分布,降低了气流绕过楼梯阻碍... 详细信息

为提高某地铁站台通风效果,建立了气流运动的数学模型,模拟气流分布,分析了气体流动的计划时间、留置时间和绕行时间对空气龄的影响,通过增加吊顶送风、隧道送风或者串联隧道送风和站台排风的方法优化气流分布,降低了气流绕过楼梯阻碍的时间,从而解决了站台局部空气龄的异常,成功地改善了通风效果.

关键词：地铁站台通风效果气流分布空气龄

Be^+离子和Li原子极化率和超极化率的理论研究

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物理学报 2021年第4期70卷 153-162页

作者：王婷蒋丽王霞董晨钟武中文蒋军西北师范大学物理与电子工程学院兰州730070

利用相对论模型势方法计算了Be^+离子和Li原子的波函数、能级和振子强度,进一步得到了基态的电偶极极化率和超极化率,并详细地分析了不同中间态对基态超极化率的贡献.对于Be^+离子,电偶极极化率和超极化率与已有的理论结果符合得非常好... 详细信息

利用相对论模型势方法计算了Be^+离子和Li原子的波函数、能级和振子强度,进一步得到了基态的电偶极极化率和超极化率,并详细地分析了不同中间态对基态超极化率的贡献.对于Be^+离子,电偶极极化率和超极化率与已有的理论结果符合得非常好.对于Li原子,电偶极极化率与已有的理论结果符合得很好,但是不同理论方法计算给出的超极化率差别非常大,最大的差别超过了一个数量级.通过分析不同中间态对Li原子基态超极化率的贡献,解释了不同理论结果之间有较大差异的原因.

关键词：电偶极极化率超极化率 Be+离子 Li原子相对论模型势方法

Shear-induced Stabilization of the Nematic Phasein a Side Group-containingPoly(aryl ether ketone) Copolymer

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Chemical Research in Chinese Universities 2001年第2期17卷 233-236页

作者： SUN Hui, MA Jia, BEN Teng, WANG Han-fu CHEN Chun-hai, ZHANG Wan-jin, JIANG Zhen-hua and wu zhong-wen (Department of Chemistry, Jilin University, Changchun 130023, P. R. China) XU Ying-kai (Institute of Chemistry, The Chinese Academy of Sciences, Beijing, 吉林大学吉林长春 130023 中科院化学所北京 100080 浙江大学浙江杭州 310027

Shear induced stabilization of the nematic phase in a side group-containing poly(aryl ether ketone) copolymer was studied. The temperature dependence of viscosity at different shear rates was displayed. Polymers in the nematic state showed lower melt viscosities than isotropic polymers with similar structures. Experimental results indicated that the temperature at which the viscosity maximum appeared shifted to higher ones with increasing levels of shear rate. This was found to induce mesophase stabilization of the thermotropic polymer.

关键词： Thermotropic liquid crystalline polymer Poly (aryl ether ketone) Shear flow Molecular orientation

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主链含间位联结的聚芳醚酮的形态结构

高等学校化学学报 1999年第4期20卷 643-646页

作者：柯扬船漆宗能吴忠文中国科学院化学研究所吉林大学化学系

选取分子主链中含有间位结构的聚芳醚酮低聚物为研究对象，利用ＴＥＭ技术，发现这类低聚物晶体中存在一种新的四角叶片状单晶，此单晶的四角对角线夹角为１０１．９°，与从晶胞参数计算所得的１０２．６°一致，从而直观地证明这类含... 详细信息

选取分子主链中含有间位结构的聚芳醚酮低聚物为研究对象，利用ＴＥＭ技术，发现这类低聚物晶体中存在一种新的四角叶片状单晶，此单晶的四角对角线夹角为１０１．９°，与从晶胞参数计算所得的１０２．６°一致，从而直观地证明这类含间位结构聚芳醚酮的晶胞按（１１０）面生长。

关键词：含间位联结聚芳醚酮四角叶片状单晶晶体