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Ti_(3)C_(2)T_(x)/SnO_(2)P–N heterostructure construction boosts room-temperature detecting formaldehyde

Rare Metals 2024年第1期43卷 267-279页

作者： Yue Zhang Ming-Yue Wang xiao-guang san Yan-Bai Shen Guo-Sheng Wang Lei Zhang Dan Meng College of Chemical Engineering Shenyang University of Chemical TechnologyShenyang 110142China Institute for Superconducting and Electronic Materials(ISEM) Australian Institute for Innovative Materials(AIIM)University ofWollongongWollongongNSW2500Australia College of Resources and Civil Engineering Northeastern UniversityShenyang 110819China

Formaldehyde is a common atmospheric pollutant produced in industrial production and daily ***,the traditional semiconductor formaldehyde gas sensor cannot work at room temperature,which limits its practical ***,developing high-performance gas sensors for rapidly and accurately detecting formaldehyde at room temperature is an important *** this study,Ti_(3)C_(2)Tx/SnO_(2)heterostructures were constructed,which could selectively detect formaldehyde at room temperature with a response value of 29.16%(10×10^(-6)).In addition,the sensor shows a remarkable theoretical detection limit of 5.09×10^(-9)and good longterm *** functional theory(DFT)simulations reveal that SnO_(2)nano spheres provide the majority of adsorption sites that strongly interact with ***,Ti_(3)C_(2)T_(x)acting as a conductive layer facilitates the transfer of charge carriers so that they show a sensing response to formaldehyde at room ***,the formation of p-n heterostructures between SnO_(2)and Ti_(3)C_(2)T_(x)boosts the Schottky barrier at the interface,which is the critical factor in enhancing the sensing properties by turning the Schottky barrier upon introducing formaldehyde *** perspective is expected to provide instructive guidance for utilizing MXene/metal oxide nanocomposites to improve the gas sensing performance at room temperature.

关键词： Ti_(3)C_(2)T_(x)/SnO_(2)nanocomposites p-n heterostructures Formaldehyde sensing Room temperature DFT calculations

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In vitro Degradation and Biocompatibility of Ca-P Coated Magnesium Alloy

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Chemical Research in Chinese Universities 2013年第2期29卷 285-289页

作者： xiao Xing ZHU Qing-san SU Ying-chao LI guang-yu The First Hospital of Jilin University Changchun 130021 P. R. China College of Materials Science and Engineering Jilin University Changchun 130022 P. R. China

Calcium-phosphate compounds（Ca-P） coating was prepared on an Mg-A1 alloy（AZ60）. Biodegradation of Ca-P coated magnesium alloy was evaluated in simulated body fluid（SBF） by examining the changes in magnesium ion concentration and pH value, which indicated that the Ca-P coating on magnesium alloy strongly affected the cor- rosion of magnesium alloy. Osteoblast MC3T3-E1 cells were utilized to investigate the cellular eytocompatibility. The cytocompatibility was measured by carrying out a series of tests, such as cholecystokinin-octapeptide（CCK-8） test, alkaline phosphatase activity（ALP） test, cellular morphology of hematoxylin-eosin（HE） staining and the induc- tion of apoptosis. It was found that the cell function showed better in the Ca-P coated Mg-alloy extract than in the uncoated magnesium alloy extract. In summary, the results indicate that the Ca-P coating can improve the corrosion resistance of magnesium alloy and elevate cellular proliferation and differentiation of osteoblast MC3T3-E1 cells.

关键词： Ca-P coating Magnesium alloy In vitro

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Synthesis,Characterization and DFT Calculation of a New Silver(I) Iodid Templated by Conjugated Cation:(ipq)_4Ag_4I_8

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Chinese Journal of Structural Chemistry 2006年第9期25卷 1148-1153页

作者： xiao guang-Can Center of Analysis and Measurement Fuzhou University Fuzhou Fujian 350002 China

A silver iodide, （ipq）4Ag418 1, has been synthesized in the presence of ipq （ipq = N-（isopentyl）-quinolinium） acting as a structure-directing reagent （SDA）. Compound 1 crystallizes in the triclinic system, space group PT, with a = 9.850（2）, b = 11.564（2）, c = 16.111（3） ,A ,α = 104.64（3）, β = 105.73（3）, γ = 94.37（3）o, V= 1688.3（7） A^3, Z = 2, D,= 2.205 g/cm^3, F（000） = 1042, C28H33Ag2l4N2, Mr= 1120.90, μ（MoKa） = 4.836 mm^-1, the final R = 0.0363 and wR = 0.0761 for 5465 observed reflections with 1 〉 2σ（I）. 1 consists of uncoordinated structure-directing molecule and inorganic moiety tuned by organic SDA. Tetrameric Ag4I8^4- anion in 1 is composed of edgesharing AgI4 tetrahedra and AgI3 planar triangles. Electrostatic interaction between organic counter cations and inorgan!c moieties is present and contributes to the crystal packing. 1 was further characterized with IR, UV-Vis, elemental analysis and cyclic voltammetry. Based on the crystal structure data, quantum chemical calculation with DFr method was used to reveal the electronic structure and optical property of 1.

关键词： coordination polymers template synthesis iodide quaternary ammonium

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Blockage robust millimeter-wave networks

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Science China(Information Sciences) 2017年第8期60卷 77-79页

作者： guang YANG Ming xiao KTH Royal Institute of Technology

Millimeter-wave(mm Wave)technique(from around 24 GHz to 300 GHz)becomes a key enabler of high date rates for future mobile communications[1].In spite of many appealing benefits,mm Wave communications also encounter several critical challenges,i.e.,very weak capability in penetration,diffraction and high-order reflections,due to the short wavelength[2].That indicates,the transmission in mm Wave bands can be blocked easily if any obstacle,e.g.,human body or vehicle in motion,occurs on the propagation path.

关键词： Wave work in AP of as link TDMA Blockage robust millimeter-wave networks is or MBS MAC wave that

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Fault-Tolerant Controlled Quantum Dialogue Using Logical Qubit

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Chinese Journal of Electronics 2018年第2期27卷 263-269页

作者： xiao Min LIU guang School of Cyber Security and Information Law Chongqing University of Posts and Telecommunications College of Computer Science and Technology Chongqing University of Posts and Telecommunications

The information leakage is a challenge in the design of Controlled quantum dialogue(CQD) protocols and the CQD protocol over noise channel has not been well researched. A CQD protocol without information leakage over an ideal channel is first proposed, where single photons are used to carrying secret information and pre-shared keys are used to authenticate identity and control information decoding for the prevention of information leakage, moreover, a novel kind of the unitary encoding operations with good property on the quantum operation discrimination are adopted to avoid active attacks from outside eavesdropper. By substituting logical qubits for single photons and constructing unitary encoding operations with the same property based on logical qubits,three fault-tolerant versions of the proposed CQD protocol are obtained, which can combat collective-dephasing,collective-rotation and all kinds of unitary collective noise,respectively. The security and efficiency analysis show the proposed protocols are appropriate for secure quantum dialogue in practice.

关键词： Controlled quantum dialogue(CQD) Single photon Logical qubit Noise channel

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MULTIPLICITY-PRESERVING TRIANGULAR SET DECOMPOSITION OF TWO POLYNOMIALS

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Journal of Systems Science & Complexity 2014年第6期27卷 1320-1344页

作者： CHENG Jin-san GAO xiao-Shan Key Laboratory of Mathematics Mechanization Institute of Systems ScienceAcademy of Mathematics and Systems ScienceChinese Academy of Sciences

In this paper, a multiplicity-preserving triangular set decomposition algorithm is proposed for a system of two polynomials, which involves only computing the primitive polynomial remainder sequence of two polynomials once and certain GCD computations. The algorithm decomposes the unmixed variety defined by two polynomials into square free and disjoint （for non-vertical components, see Definition 4） algebraic cycles represented by triangular sets which may have negative multiplicities. Thus, the authors can count the multiplicities of the non-vertical components. In the bivariate case, the amthors give a complete algorithm to decompose tile system into zeros represented by triangular sets with multiplicities. The authors also analyze the complexity of the algorithm in the bivariate ease. The authors implement the algorithm and show the effectiveness of the method with extensive experiments.

关键词： Algebraic cycle multiplicity-preserving primitive polynomial remainder sequence trian-gular set decomposition.

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Efficacy of Yiqiyangxin Chinese medicine compound combined with cognitive therapy in the treatment of generalized anxiety disorders

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Asian Pacific Journal of Tropical Medicine 2012年第10期5卷 818-822页

作者： Ting Wang Jing-Yuan Ding guang-Xing Xu Yu Zeng san-Rong xiao School of Psychology and Cognitive Science East China Normal University East China sanatorium Department of Management Hainan Medical University

Objective:To observe the clinical efficacy of Yiqiyangxin Chinese medicine compound combined with cognitive therapy on generalized anxiety ***:A total of 202 generalized anxiety disorders patients were randomly allocated to a control condition(Paroxetine combined with cognitive therapy) or a treatment condition(Yiqiyangxin Chinese medicine compound combined with cognitive therapy).Subsequently,scores of Hamilton Anxiety Scale(HAMA), Zung Self-rating Anxiety Scale(SAS) and blood routine,urine routine,liver function,renal function,electrocardiogram were detected before treatment,3 months,6 months after treatment and 6 months after medicine withdrawal,***:HAMA and SAS scores were significantly reduced in two groups(P0.05).HAMA and SAS scores were significantly increased in two groups(P<0.05) after medicine withdrawal,and there were significant differences in HAMA and SAS scores,recurrent disease and adverse reaction(P<0.001). The incidence of recurrent disease and adverse reaction in treatment group was *** two groups showed no apparent abnormality in blood routine,urine routine,liver and renal function, and ***:Yiqiyangxin Chinese medicine compound combined with cognitive therapy can significantly reduce the recurrence after medicine withdrawal and is effective on generalized anxiety ***,the incidence of adverse reactions is low. The treatment program is worthy clinic application in the further.

关键词： Yiqiyangxin Chinese medicine Compound Cognitive therapy Generalized anxiety disorder

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Entanglement of Two-Qubit Quantum Heisenberg XYZ Chain

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Chinese Physics Letters 2002年第8期19卷 1044-1047页

作者： Xi xiao-Qiang, Hao san-Ru Institute of Modern Physics Northwest University Fundamental Department Xi"an Institute of Posts and Telecommunications

We derive the analytic expression of the concurrence in the quantum Heisenberg XYZ model and discuss the influence of parameters J, Δ and Γ on the concurrence. By choosing different values of Γ and Δ, we obtain the XX, XY, XXX and XXZ chains. The concurrence decreases with increasing temperature. When T→0, the concurrence reaches its maximum value 1, i.e. the entangled state, |Ψ> = (((2)^1/2)/2)(|01>-|10>), is maximum entanglement. For the XXZ chain, when , the concurrence will meet its maximum value Cmax = (sinh (1/T))/(cosh (1/T)).

关键词： Chains

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Preliminary studies on methane flux from the ornithogenic soils on Xi-sha atoll, South China Sea

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Journal of Environmental Sciences 2005年第5期17卷 789-793页

作者： ZHU Ren-bin SUN Li-guang ZHAO san-ping XIE Zhou-qing LIU xiao-dong YIN Xue-bin Institute of Polar Environment University of Science and Technology of China Hefei 230026 China

Methane flux from the ornithogenic soils was preliminarily measured by closed chamber method on Xi-sha atoll, South China Sea during March 10 to April 11, 2003 for the first time. The CH4 flux ranged from - 226.7 μg/（m^2 ·h） to 226.3 μg/（m^· h） at the observation sites on Dong Island. High atmospheric CH4 consumption was observed from the ornithogenic soils on sunny days. CH4 uptake rates showed the highest value after the midday and they had a strong positive correlation with soil temperatures. Under the same weather conditions, the CH4 fluxes were also observed from the intact and disturbed soils on Yongxing Island. Results showed that the intact soils with natural vegetation also showed high atmospheric CH4 consumption and the average flux was - 141.8 μg/（ m^2· h）. However, disturbed soils via anthropogenic reclamation showed CH4 emissions and the average flux was 441 .7 μg/（ m^2· h）. Therefore land use changes may have an important effect on the CH4 fluxes from the tropical ornithogenic soils. In addition, different observation sites show a high spatial variation in CH4 fluxes. The wetland in salt marsh showed the CH4 emission on Dong Island, and the dry soil sites all showed high atmospheric CH4 consumption, suggesting that CH4 fluxes were predominantly controlled by soil water regime. The effects of soil chemical properties on CH4 fluxes were also analyzed and discussed in this paper.

关键词： methane flux South China Sea ornithogenic soil Xi-sha atoll

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Formal Verification Techniques Based on Boolean Satisfiability Problem

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Journal of Computer Science & Technology 2005年第1期20卷 38-47页

作者： xiao-WeiLit guang-HuiLi MingShao InstituteofComputingTechnology ChineseAcademyofSciencesBeijing100080P.R.China／／GraduateSchoolofChineseAcademyofSciencesBeijing100039P.R.China SchoolofInformationEngineering ZhejiangForestryCollegeHangzhou311300P.R.China／／GraduateSchoolofChineseAcademyofSciencesBeijing100039P.R.China

This paper exploits Boolean satisfiability problem in equivalence checking and model checking respectively. A combinational equivalence checking method based on incremental satisfiability is presented. This method chooses the can didate equivalent pairs with some new techniques, and uses incremental satisfiability algorithm to improve its performance. By substituting the internal equivalent pairs and converting the equivalence relations into conjunctive normal form (CNF) formulas, this approach can avoid the false negatives, and reduce the search space of SAT procedure. Experimental results on ISCAS'85 benchmark circuits show that, the presented approach is faster and more robust than those existed in *** paper also presents an algorithm for extracting of unsatisfiable core, which has an important application in abstraction and refinement for model checking to alleviate the state space explosion bottleneck. The error of approximate extraction is analyzed by means of simulation. An analysis reveals that an interesting phenomenon occurs, with the increasing density of the formula, the average error of the extraction is decreasing. An exact extraction approach for MU subformula, referred to as pre-assignment algorithm, is proposed. Both theoretical analysis and experimental results show that it is more efficient.

关键词： equivalence checking incremental satisfiability minimal unsatisfiableformula model checking

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