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Study on activated carbon in chromium-containingwastewater treatment by XPS

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Journal of Environmental Sciences 1994年第2期6卷 173-179页

作者： Yang Jun Wang Yunxiu(Shandong University of Technology,jinan 250014, China)Zhang Yinsheng(Shandong Non-Metallic Material Research Institute,jinan 250014, China)

The mechanism of activated carbon treatment with chromium-containing wastewater byX-ray photoelectron spectroscopy (XPS) and that of adsorption and reduction reaction of the acti-vated carbon with hexavalent chromium solution are presented in this paper. The XPS results showthat at PH6,the main process is adsorption of the car-bon to Cr(VI). The optimum range of treatment is at pH 3-6,in which removal efficiency ofadsorption and reduction is relatively high. It demonstrates that the reduction mechanism is aheterogeneous acid catalysis process.

关键词： wastewater treatment X-ray photoelectron spectrometry activated carbon.

A note on a result of Abercrombie

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Chinese Science Bulletin 1997年第14期42卷 1151-1154页

作者： ZHAI WenguangDepartment of Mathematics, Shandong Normal University, jinan 250014, China Department of Mathematics Shandong Normal University Jinan China

SUPPOSE θ∈[1,+ ∞) is any real number. The sequence B_θ={[nθ]|n∈N}is calledBeatty’s sequence determined by θ. Beatty sequences have been the subject of intensive inves-tigation in recent years on account of the... 详细信息

关键词： Bealty’s sequence divisor problem rational approximation.

Reciprocal sums of a class of additive functions in short intervals

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Chinese Science Bulletin 1997年第2期42卷 102-105页

作者： ZHAI WenguangDepartment of Mathematics, Shandong Normal University, jinan 250014, China Department of Mathematics Shandong Normal University Jinan China

USING the method of probabilistic number-theory, De Koninck, and De Koninck and Galambos studied the reciprocal sum of the additive function f（n） satisfying f（n）≥t0>0 （n≥2） and f（p）≡1 and obtained an asymptotic formula, where t0 is an absolute positive constant. Let B（x） denote the number of n≤x not satisfying the inequality loglogn-R（x）≤f（n）≤loglogn+R（x）, （1） where R（x） is a function tending to infinity. Then in refs. [1, 2], it is proved that if R（x）=o（loglogx） and B（x）=o（x/loglogx）,

关键词： additive functions Riemann zeta-function asymptotic formula.

On the error term in Weyl’s law for the Heisenberg manifolds (Ⅱ)

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Science China Mathematics 2009年第5期52卷 857-874页

作者： ZHAI WenGuang School of Mathematical Sciences, Shandong Normal University, jinan 250014, China School of Mathematical Sciences Shandong Normal University Jinan China

In this paper we study the mean square of the error term in the Weyl's law of an irrational (2l + 1)-dimensional Heisenberg manifold. An asymptotic formula is established.

关键词： Heisenberg manifold Weyl’s law error term mean square

Extraction of Surface Roughness from the Central δ-peak of Light Scattering Using a Multi-wavelength Ar~+ Laser

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Chinese Journal of Lasers 2000年第3期9卷 22-27页

作者： LIU Deli QI Dongping CHENG Chuanfu (Department of Physics, Shandong Normal University, jinan 250014, China) 山东师范大学山东济南

In this paper, a new light scattering method for measuring t he roughness of random surfaces is proposed. The method is based on the relation between the specularly reflected intensity I s, i.e., the central δ-peak intensity and wave vector component k z. The linear fit of the logarithm graph of the normalized central δ-peak intensity I sr versus k-2 z, whose variation is induced by changing illuminating wavelength, gives the square of the surface roughness w. The roughnesses of 6 silicon backside samples were measured.

关键词： random surface roughness light scattering multi-wavelength

THERMAL CONDUCTIVITY OF Al-Li ALLOY AT CRYOGENIC TEMPERATURES

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中国有色金属学会会刊：英文版 1996年第4期6卷 127-129页

作者： Sun Dongsheng Li engzhao Shang Lei(Department of Materials Science and Engineering,Shandong Univesity of Technology,jinan 250014) Department of Materials Science and Engineering Shandong Univesity of Technology Jinan 250014 China

ＴＨＥＲＭＡＬＣＯＮＤＵＣＴＩＶＩＴＹＯＦＡｌ－ＬｉＡＬＬＯＹＡＴＣＲＹＯＧＥＮＩＣＴＥＭＰＥＲＡＴＵＲＥＳ￥ＳｕｎＤｏｎｇｓｈｅｎｇ；ＬｉＦｅｎｇｚｈａｏ；ＳｈａｎｇＬｅｉ（ＤｅｐａｒｔｍｅｎｔｏｆＭａｔｅｒｉａｌ... 详细信息

ＴＨＥＲＭＡＬＣＯＮＤＵＣＴＩＶＩＴＹＯＦＡｌ－ＬｉＡＬＬＯＹＡＴＣＲＹＯＧＥＮＩＣＴＥＭＰＥＲＡＴＵＲＥＳ￥ＳｕｎＤｏｎｇｓｈｅｎｇ；ＬｉＦｅｎｇｚｈａｏ；ＳｈａｎｇＬｅｉ（ＤｅｐａｒｔｍｅｎｔｏｆＭａｔｅｒｉａｌｓＳｃｉｅｎｃｅａｎｄＥｎｇｉｎｅ...

关键词： thermal conductivity Al-Li alloy cryogenic temperatures

Calculations of lattice constants, energies of cohesion, and compressibilities of G@C_(60) (G= He, Ne, Ar ) molecular crystals

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Chinese Science Bulletin 1997年第13期42卷 1082-1085页

作者： LIU Fengling, WANG Zexin and JIANG YunshengShandong Normal University, jinan 250014, China Shandong Normal University Jinan 250014 China

SINCE the discovery and subsequent macroscopic synthesis of fullerenes,due to their unusualstructure and widely potential applications,many theoretical and experimental scientists havedone a lot of work on *** are the hollow cage molecules,the large,closedspheroidal shapes suggest that they could hold a variety of small guest atoms and/or

关键词： G@C60(G=He Ne Ar) endohedral fullerene complex molecular crystal lattice constant energy of cohesion.

The Ambient Gas Effects on Pulsed Laser Ablation of Target

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光电子·激光 1996年第1期7卷 12-15页

作者： Gongtang Wang Xiangtai Wang Baoyuan Mian(Department of physics,Shandong Normal University,jinan 250014)Bingzhang Xu Liangmo Mei(Department of physics.Shandong University,jinan 250100) 山东师范大学物理系山东济南山东大学物理系山东济南

ＴｈｅＡｍｂｉｅｎｔＧａｓＥｆｆｅｃｔｓｏｎＰｕｌｓｅｄＬａｓｅｒＡｂｌａｔｉｏｎｏｆＴａｒｇｅｔ￥ＧｏｎｇｔａｎｇＷａｎｇ；ＸｉａｎｇｔａｉＷａｎｇ；ＢａｏｙｕａｎＭｉａｎ（Ｄｅｐａｒｔｍｅｎｔｏｆｐｈｙｓｉｃｓ，... 详细信息

ＴｈｅＡｍｂｉｅｎｔＧａｓＥｆｆｅｃｔｓｏｎＰｕｌｓｅｄＬａｓｅｒＡｂｌａｔｉｏｎｏｆＴａｒｇｅｔ￥ＧｏｎｇｔａｎｇＷａｎｇ；ＸｉａｎｇｔａｉＷａｎｇ；ＢａｏｙｕａｎＭｉａｎ（Ｄｅｐａｒｔｍｅｎｔｏｆｐｈｙｓｉｃｓ，ＳｈａｎｄｏｎｇＮｏｒｍａｌＵｎｉ...

关键词： Al￣+ ion mean projected range laser ablation ambient gas effect.

The Existence of Periodic Orbits for Nonlinear Impulsive Differential Systems

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Communications in Nonlinear Science and Numerical Simulation 1999年第1期4卷 50-53页

作者： Xilin FU Jiangang QI and Yansheng LIU (Department of Mathematics, Shandong Normal University, jinan 250014, China) Department of Mathematics Shandong Normal University Jinan 250014 China

In this paper, we gave the necessary and sufficient condition for the existence of the periodic solutions of nonlinear impulsive differential systems by using a special function and study the stable properties of suc... 详细信息

关键词： impulsive differential equation periodic orbit stable