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Communications in Theoretical Physics 2009年第11期52卷 773-778页

作者： zhang li-hua HE Jin-Yu Department of Mathematics Shandong University Jinan 250100 China Department of Mathematics Dezhou University Dezhou 253023 China Department of Physics Dezhou University Dezhou 253023 China

In the present paper, with the aid of symbolic computation, families of new nontrivial solutions of the first-order sub-ODE F12 = AF2 ＋ BF2＋p ＋ CF2＋2p （where F1= dF/dε, p 〉 0） are obtained. To our best knowledge, these nontrivial solutions have not been found in [X.Z. li and M.L. Wang, Phys. Lett. A 361 （2007） 115] and IS. zhang, W. Wang, and J.L. Tong, Phys. Lett. A 372 （2008） 3808] and other existent papers until now. Using these nontrivial solutions, the sub-ODE method is described to construct several kinds of exact travelling wave solutions for the generalized KdV-mKdV equation with higher-order nonlinear terms and the generalized ZK equation with higher-order nonlinear terms. By means of this method, many other physically important nonlinear partial differential equations with nonlinear terms of any order can be investigated and new nontrivial solutions can be explicitly obtained with the help of symbolic computation system Maple or Mathematics.

关键词： generalized KdV-mKdV equation generalized Zakharov-Kuznetsov equation the sub-ODE methods symbolic computation higher-order nonlinear terms

Chromium Extraction from Sewage Sludge Using Polyepoxysuccinic Acid

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Pedosphere 2012年第1期22卷 131-136页

作者： zhang li-hua ZHU Zhi-liang Department of Chemistry and Biology Engineering Sanming UniversitySanming 365004(China) State Key Laboratory of Pollution Control and Resource Reuse Tongji UniversityShanghai 200092(China)

An environmentally benign biodegradable chelant,polyepoxysuccinic acid(PESA),was used to separate heavy metals from sewage sludge from the Shanghai Taopu Wastewater Treatment Plant,China,based on chemical extraction *** extraction of chromium(Cr) from sewage sludge with an aqueous solution of PESA was studied under various *** was found that the extraction of Cr using PESA was more efficient than that using ethylenediaminetetraacetic acid(EDTA) and S,S-ethylenediaminedisuccinic acid(EDDS) under similar *** was capable of extracting Cr from the sewage sludge,and the extraction efficiency was obviously dependent on both the pH and the concentration of the chelating *** extraction efficiency decreased gradually with increasing pH,and the dependence on pH decreased as the concentration of PESA *** extraction efficiency reached 58% under conditions of pH = 4 and a ratio of PESA to total heavy metals of 10:*** extraction efficiency was maintained above 40% within the pH range from 1 to 7 at the high ratio of PESA to total heavy metals of 10:*** the contents of heavy metals in the sewage sludge before and after the extraction,it was found that the extracted Cr came mainly from the reducible and oxidizable fractions.

关键词： ethylenediaminetetraacetic acid extraction efficiency heavy metals pH S S-ethylenediaminedisuccinic acid

New Exact Solutions and Conservation Laws to （3＋1）-Dimensional Potential-YTSF Equation

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Communications in Theoretical Physics 2006年第3期45卷 487-492页

作者： zhang li-hua liU Xi-Qiang School of Mathematical Science Liaocheng University Liaocheng 252059 China

Using the modified find some new exact solutions to lie point symmetry groups and also get conservation laws, of the CK＇s direct method, we build the relationship between new solutions and old ones and the （3＋1）-dimensional potentiaial-YTSF equation. Baaed on the invariant group theory, lie symmetries of the （3＋1）-dimensional potential-YTSF equation are obtained. We equation with the given lie symmetry.

关键词： new exact solutions lie point symmetry groups conservation laws (3+1)-dimensional potential-YTSF equation

The water-saving potential of using micro-sprinkling irrigation for winter wheat production on the North China Plain

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Journal of Integrative Agriculture 2021年第6期20卷 1687-1700页

作者： ZHAI li-chao LU li-hua DONG Zhi-qiang zhang li-hua zhang Jing-ting JIA Xiu-ling zhang Zheng-bin Institute of Cereal and Oil Crops Hebei Academy of Agriculture and Forestry Sciences/Scientific Observing and Experimental Station of Crop Cultivation in the North ChinaMinistry of Agriculture and Rural AffairsShijiazhuang 050035P.R.China Center for Agricultural Resources Research Institute of Genetics and Development BiologyChinese Academy of SciencesShijiazhuang 050021P.R.China

The shortage of groundwater resources is a considerable challenge for winter wheat production on the North China ***-saving technologies and procedures are thus urgently *** determine the water-saving potential of using micro-sprinkling irrigation(MSI)for winter wheat production,field experiments were conducted from 2012 to *** to traditional flooding irrigation(TFI),micro-sprinkling thrice with 90 mm water(MSI1)and micro-sprinkling four times with 120 mm water(MSI2)increased the water use efficiency by 22.5 and 16.2%,respectively,while reducing evapotranspiration by 17.6 and 10.8%.Regardless of the rainfall pattern,MSI(i.e.,MSI1 or MSI2)either stabilized or significantly increased the grain yield,while reducing irrigation water volumes by 20–40%,compared to *** the same volumes of irrigation water,MSI(i.e.,MSI3,micro-sprinkling five times with 150 mm water)increased the grain yield and water use efficiency of winter wheat by 4.6 and 11.7%,respectively,compared to *** MSI could supply irrigation water more frequently in smaller amounts each time,it reduced soil layer compaction,and may have also resulted in a soil water deficit that promoted the spread of roots into the deep soil layer,which is beneficial to photosynthetic production in the critical *** conclusion,MSI1 or MSI2 either stabilized or significantly increased grain yield while reducing irrigation water volumes by 20–40%compared to TFI,and should provide water-saving technological support in winter wheat production for smallholders on the North China Plain.

关键词： winter wheat grain yield water use efficiency micro-sprinkling irrigation traditional flooding irrigation water-saving potential

Scheme for Entanglement Generation of Two Atoms in Two Bad Cavities

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Communications in Theoretical Physics 2008年第3期49卷 595-598页

作者： zhang li-hua CAO Zhuo-liang Department of Physics Anqing Teachers College Anqing 246011 China Anhui Key Laboratory of Information Material and Devices School of Physics and Materials Science Anhui University Hefei 230039 China

We present a scheme for generation of two-atomic entangled state by using the interference of polarized photons. The scheme does not require complete mapping between the atomic state and the photonic state, nor does it require the establishment of maximal entanglement between the atom and the cavity. And the atom-cavity coupling strength is smaller than the cavity decay rate. This greatly relaxes the requirement on the cavity quality. The scheme is for non-post-selection results and all the steps of the scheme are within the current technologies.

关键词： entangled state cavity QED

Sensitivity of key factors and uncertainties in health risk assessment of benzene pollutant

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Journal of Environmental Sciences 2007年第10期19卷 1272-1280页

作者： liU Zhi-quan zhang Ying-hua li Guang-he zhang Xu Department of Environmental Science and Engineering Tsinghua University Beijing 100084 China

Predicting long-term potential human health risks from contaminants in the multimedia environment requires the use of models. However, there is uncertainty associated with these predictions of many parameters which can be represented by ranges or probability distributions rather than single value. Based on a case study with information from an actual site contaminated with benzene, this study describes the application of MMSOILS model to predict health risk and distributions of those predictions generated using Monte Carlo techniques. A sensitivity analysis was performed to evaluate which of the random variables are most important in producing the predicted distributions of health risks. The sensitivity analysis shows that the predicted distributions can be accurately reproduced using a small subset of the random variables. The practical implication of this analysis is the ability to distinguish between important versus unimportant random variables in terms of their sensitivity to selected endpoints. This directly translates into a reduction in data collection and modeling effort. It was demonstrated that how correlation coefficient could be used to evaluate contributions to overall uncertainty from each parameter. The integrated uncertainty analysis shows that although drinking groundwater risk is similar with inhalation air risk, uncertainties of total risk come dominantly from drinking groundwater route. Most percent of the variance of total risk comes from four random variables.

关键词： Monte Carlo sensitivity uncertainty MMSOILS models risk assessment

Comparison and Optimization of Mid-low Temperature Cogeneration Systems for Flue Gas in Iron and Steel Plants

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Journal of Iron and Steel Research International 2013年第11期20卷 33-40页

作者： zhang li-hua WU li-jun zhang Xiao-hong JU Gui-dong Thermal and Environmental Engineering Institute Tongji University Resources and Environment Department Shandong Water Polytechnic

Three generation systems, namely, steam Rankine cycle （SRC）, organic Rankine cycle （ORC）, and steam-organic combined Rankine cycle （S-ORC）, were simulated using the Engineering Equation Solver fEES） to efficiently utilize flue gas emissions from 200 to 450 ℃ in iron and steel plants. Based on the simulation results for thermal efficiency, exergy efficiency, and power generation, the performances of the three power generation systems were compared and analyzed. To further utilize waste heat from the turbine exhaust steam of the ORC system, cas- cade （）RC （CORC） was designed for heat sources above 300 ℃. Based on a comprehensive performance comparison, the application of the ORC using R141b is preferable for 200 to 300 ℃ flue gas. For 300 to 450 ℃ flue gas, CORC is an alternative technology to improve the efficiency and quality of waste heat utilization. For flue gas above 450 ℃, S-ORC can achieve higher efficiency and power generation than conventional SRC, with a relatively small negative pressure and high dryness of the turbine outlet steam. Hence, S-ORC can be considered as a substitute for SRC.

关键词： mid-low temperature flue gas Rankine cycle thermal energy recovery generation system

Optical Properties of Plasmon Resonances with Ag/SiO2/Ag Multi-Layer Composite Nanoparticles

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Chinese Physics Letters 2010年第6期27卷 107-109页

作者： MA Ye-Wan zhang li-hua WU Zhao-Wang zhang Jie School of Physics and Electric Engineering Anqing Teachers College Anqing 246011

Optical properties of plasmon resonance with Ag/SiO2/Ag multi-layer nanoparticles are studied by numerical simulation based on Green＇s function theory. The results show that compared with single-layer Ag nanoparticles, the multi-layer nanoparticles exhibit several distinctive optical properties, e.g. with increasing the numbers of the multi-layer nanoparticles, the scattering efficiency red shiRs, and the intensity of scattering enhances accordingly. It is interesting to find out that slicing an Ag-layer into multi-layers leads to stronger scattering intensity and more ＂hot spots＂ or regions of stronger field enhancement. This property of plasmon resonance of surface Raman scattering has greatly broadened the application scope of Raman spectroscopy. The study of metal surface plasmon resonance characteristics is critical to the further understanding of surface enhanced Raman scattering as well as its applications.

关键词：复合纳米粒子等离子体共振光学性能表面增强拉曼散射银纳米粒子格林函数理论散射强度共振拉曼散射

Optimal State Estimation of Pure Qubits on Circles

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Communications in Theoretical Physics 2008年第6期49卷 1477-1482页

作者： zhang li-hua SONG Wei CAO Zhuo-liang Department of Physics Anqing Teachers College Anqing 246011 China Anhui Key Laboratory of Information Material ＆ Devices School of Physics and Materials Science Anhui University Hefei 230039 China Hefei National Laboratory for Physical Sciences at Microscale and Department of Modern Physics University of Science and Technology of China Hefei 230026 China

We consider the problem of state estimation of qubits chosen from circles. It is shown that any qubit encoded in pairs chosen from a fixed circle parailel to the x-y equator with different phases contains the same information. We also investigate the problem of state estimation of qubits from three circles. The optimai estimation fidelity is derived.

关键词： state estimation pure qubits estimation fidelity

Effects of insertion device on SSRF storage ring

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Nuclear Science and Techniques 2006年第1期17卷 1-6页

作者： zhang li-hua liAO Yi liU Gui-Min Shanghai Institute of Applied Physics the Chinese Academy of Sciences Shanghai 201800 China

Shanghai Synchrotron Radiation Facility (SSRF), one of the third generation light sources, aims to pro-duce high brightness and/or high flux X-ray source for users; therefore insertion devices (IDs) are important magnetic elements for SSRF. In this paper, the linear perturbations due to IDs toward its storage ring lattice, such as beta func-tion distortions, tune shifts, emittance growths, and energy spreads are estimated by using analytical formulae, and the nonlinear effects from IDs, especially dynamic aperture, are simulated by using Racetrack code. The results show that (a) the reduction of dynamic aperture from single undulator is negligible, since electron beam energy of 3.5 GeV is high and ID’s magnetic field is low, and the beta functions in the middle of straight sections, where ID is located, are well optimized; (b) however, the reduction from single wigglers, especially super-conducting wiggler, is visible, be-cause of its higher magnetic field; (c) effects of each ID on emittance growths and energy spreads are less than 7%.

关键词： SSRF 储存环插入装置第三代光源同步加速器