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Sino -U .S .Relations in Retrospect and Prospect——In Commemoration of the 25th Anniversary for the Establishment of Diplomatic Relations Between the PRC and the U.S.A

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和平与发展 2004年第2期 60-64页

作者： sa Benwang

Pulse Waveform Analysis as A Bridge between Pulse Examination in Chinese Medicine and Cardiology

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Chinese Journal of Integrative Medicine 2013年第4期19卷 307-314页

作者： Arthur de sa Ferreira Agnaldo Jose Lopes Postgraduation Program of Rehabilitation Science Augusto Motta University CenterRio de JaneiroRJBrazil Department of Physical Therapy Salgado de Oliveira UniversityNiteroiRJBrazil Laboratory of Respiratory Physiology University of the State of Rio de JaneiroRio de JaneiroRJBrazil

Pulse examination was probably the earliest attempt to distinguish between health and illnesses. Starting at the pre-Hippocratic era, Chinese medicine practitioners developed techniques for pulse examination and defined pulse images based on their perceptions of pulse waveforms at the radial artery. Pulse images were described using basic variables （frequency, rhythm, wideness, length, deepness, and qualities） developed under philosophical trends such as Taoism and Confucianism. Recent advances in biomedical instrumentation applied to cardiology opened possibilities to research on pulse examination based on ancient Chinese medical theories： the pulse wave analysis. Although strongly influenced by philosophy, some characteristics used to describe a pulse image are interpretable as parameters obtained by pulse waveform analysis such as pulse wave velocity and augmentation index. Those clinical parameters reflect concepts unique to Chinese medicine - such as yin- yang - while are based on wave reflection and resonance theories of fluids mechanics. Major limitations for integration of Chinese and Western pulse examination are related to quantitative description of pulse images and pattern differentiation based on pulse examination. Recent evidence suggests that wave reflection and resonance phenomena may bridge Chinese medicine and cardiologyto provide a more evidence-based medical practice.

关键词： blood circulation palpation diagnosis Chinese medicine pulse waveform

Enhancement of subgap conductance in a graphene superconductor junction by valley polarization

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Chinese Physics B 2017年第2期26卷 428-434页

作者： Chuan-Xin Li sa-Ke Wang Jun Wang College of Mathematics and Physics Jingchu University of Technology Jingmen 448000 China Department of Physics Southeast University Nanjing 210096 China

We theoretically study the differential conductance of a graphene/graphene superconductor junction, where the valley polarization of Dirac electrons is considered in the nonsuperconducting region. It is shown that the subgap conductance will increase monotonically with the valley-polarization strength when the chemical potential μ is near the Dirac point μ≤ 3？（？ is the superconducting gap）, whereas it will decrease monotonically when μ is far away from the Dirac point, μ≥ 5？.The former case is induced by the specular Andreev reflection while the retro-reflection accounts for the later result. Our findings may shed light on the control of conductance of a graphene superconductor junction by valley polarization.

关键词： graphene valley polarization subgap conductance specular Andreev reflection

近40年内蒙古近地表土壤冻融状态时空演变特征解析

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水土保持研究 2025年第1期32卷 148-159页

作者：田鑫萨楚拉孟凡浩罗敏王牧兰张翔张昊琛内蒙古师范大学地理科学学院内蒙古自治区遥感与地理信息系统重点实验室内蒙古自治区土地储备中心

[目的]解析内蒙古近地表土壤冻融状态的时空分异及变化规律并量化驱动因素的影响，为区域生态环境保护及基础设施建设提供理论依据。[方法]基于ERA5-LAND土壤温度数据，利用Sen趋势分析(Theil-Sen median)、Mann-Kendall检验和多元回归... 详细信息

[目的]解析内蒙古近地表土壤冻融状态的时空分异及变化规律并量化驱动因素的影响，为区域生态环境保护及基础设施建设提供理论依据。[方法]基于ERA5-LAND土壤温度数据，利用Sen趋势分析(Theil-Sen median)、Mann-Kendall检验和多元回归残差分析，对内蒙古地区近40年地表土壤冻融状态的时空演变特征及其驱动因素进行了分析。[结果](1)近40年内蒙古地区秋冬始冻期和完全冻结期起始日期呈推迟趋势，变化速率分别为0.54 d/10 a和0.45 d/10 a;在空间分布上，随着经纬度的增加逐渐提前。冬春解冻期和完全融化期起始日期呈提前趋势，变化速率分别为2.17 d/10 a和2.15 d/10 a;空间上随着经纬度的增加逐渐推迟。(2)秋冬始冻期、完全冻结期和冬春解冻期的发生天数呈减少趋势，变化速率分别为0.10 d/10 a, 2.61 d/10 a和0.27 d/10 a,而完全融化期的发生天数则以2.68 d/10 a的速率在增加。空间分布上，除完全冻结期呈东北向西南逐渐减少的趋势，其余3个阶段均呈东北向西南逐渐增加的趋势。(3)不同土壤冻融状态受气候变化和人类活动共同驱动影响的面积占比最大，其次为单独由气候变化驱动影响的面积占比，单独由人类活动驱动影响的面积占比最小。[结论]近地表土壤冻融状态的时空分异及变化规律明显，不同区域不同土壤冻融状态的驱动力各不相同，对内蒙古地区生态环境保护及基础设施建设意义重大，未来应更加深入分析气候变化及人类活动对其的影响。

关键词：地表土壤冻融时空演变特征内蒙古气候变化人类活动

On Newton’s Method for Solving Nonlinear Equations and Function Splitting

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Numerical Mathematics(Theory,Methods and Applications) 2011年第1期4卷 53-67页

作者： Ioannis K.Argyros saïd Hilout Cameron University Department of Mathematics SciencesLawtonOK 73505USA Universitéde Poitiers Laboratoire de Mathématiques et ApplicationsBd.Pierre et Marie CurieTéléport 2B.P.3017986962 Futuroscope Chasseneuil CedexFrance

We provided in[14]and[15]a semilocal convergence analysis for Newton’s method on a Banach space setting,by splitting the given *** this study,we improve the error bounds,order of convergence,and simplify the sufficie... 详细信息

关键词： Newton’s method Banach space majorizing sequence semilocal convergence splitting of an operator

Two Polyoxometalate-based Host-guest Compounds:Synthesis,Crystal Structure and Catalytic Performance

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Chinese Journal of Structural Chemistry 2021年第12期40卷 1655-1660,1554页

作者： WANG Song-Xia WANG sa-sa WU Xiao-Yuan YANG Wen-Bin LU Can-Zhong Fujian Normal University Fuzhou 350007China CAS Key Laboratory of Design and Assembly of Functional Nanostructures and Fujian Provincial Key Laboratory of NanomaterialsFujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China University of Chinese Academy of Sciences Beijing 100049China

Two polyoxometalate-based host-guest compounds,(HL1)2(HPW12O40)〜11H2O(1),(HL2)3(PWi2O40)·3H2O(2)(L_(1)=guanine,L_(2)=2-(1H-1,2,4-triazol-3-yl)pyridine),were synthesized under hydrothermal conditions and characterized by EA,PXRD,TG,FT-IR and X-ray single-crystal *** 1 crystallizes in trigonal space group P-3 with a=18.2917(5),b=18.2917(5),c=13.5441(5)A,V=3924.5(3)A^(3),Z=3,Mr=3383.26 g/mol,pcak=4.036 g/cm^(3),F(000)=4137,=48.532 mm^(-1),GOOF=1.062,the final R=0.0713 and wR=0.1865 for 9037 observed reflections with I>2σ(I).Compound 2 crystallizes in trigonal space group R-3 with a=19.0017(6),b=19.0017(6),c=25.6361(9)A,V=8016.2(6)A^(3),Z=6,Mr=3372.45 g/mol,p_(calc)=4.188 g/cm,F(000)=8886,μ=47.644 mm^(-1),GOOF=1.077,the final R=0.0380 and wR=0.0976 for 5904 observed reflections with I>2σ(I).These two compounds can catalyze selective oxidation of aniline with H2O2 as the *** optimal conditions,the conversion of aniline with compound 1 can reach up to 91.25%,and the selectivity of nitrosobenzene is 78.81%.

关键词： polyoxometalates catalytic oxidation aniline nitrosobenzene

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Fast Calculation of Electromagnetic Forces in IPMSMs Under PWM VSI Supply Based on Small-Signal Time-Harmonic Finite Element Method

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CES Transactions on Electrical Machines and Systems 2022年第1期6卷 67-76页

作者： sa Zhu Jianbo Lu Feng Zeng IEEE College of Energy and Electrical Engineering Hohai UniversityNanjing211100China

This paper introduces a novel method for fast calculating the electromagnetic forces in interior permanent magnet synchronous machines(IPMSMs)under pulse width modulation(PWM)voltage source inverter(VSI)supply based on the small-signal time-harmonic finite element analysis(THFEA),which has been successfully utilized for fast calculating the PWMinduced losses in silicon steel sheets and permanent *** on the small-signal THFEA,the functional relationships between high-frequency harmonic voltages(HFHVs)and corresponding airgap flux densities are established,which are used for calculating the flux density spectra caused by each HFHV in the PWM voltage ***,the superposition principle is applied for calculating the flux density spectra caused by fundamental currents and all HFHVs,which are converted to the electromagnetic force spectra at *** relative errors between the force density spectra calculated with the proposed method and those obtained from traditional time-stepping finite element analysis(TSFEA)using PWM voltages as input are within 3.1%,while the proposed method is 24 times faster than the traditional TSFEA.

关键词： Time-harmonic finite element analysis(THFEA) Interior permanent magnet synchronous machines(IPMSMs) Electromagnetic forces Pulse width modulation Vibration and acoustic noise

New Results on Discrete-time Delay Systems Identification

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International Journal of Automation and computing 2012年第6期9卷 570-577页

作者： sada Bedoui Majda Ltaief Kamel Abderrahim Department of Electrical and Automation Engineering National Engineering School of GabesUniversity of Gabes

A new approach for simultaneous online identification of unknown time delay and dynamic parameters of discrete-time delay systems is proposed in this *** proposed algorithm involves constructing a new generalized regression vector and defining the time delay and the rational dynamic parameters in the same *** gradient algorithm is used to deal with the identification *** effectiveness of this method is illustrated through simulation.

关键词： Time delay identification gradient method discrete-time delay system iterative algorithm.

The enhancement of performance and imbibition effect of slickwater-based fracturing fluid by using MoS_(2)nanosheets

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Petroleum Science 2023年第4期20卷 2187-2201页

作者： Hang Xu Yuan Li Guo-Lin Yu sa-sa Yang Bo-Jun Li Fu-Jian Zhou Er-Dong Yao Hao Bai Zhi-Yu Liu Unconventional Petroleum Research Institute China University of Petroleum(Beijing)Beijing102249China National Key Laboratory of Petroleum Resources and Engineering China University of Petroleum(Beijing)Beijing102249China

Slickwater-based fracturing fluid has recently garnered significant attention as the major fluid for volumetric fracturing;however,lots of challenges and limitations such as low viscosity,poor salt tolerance,and possible formation damage hinder the application of the conventional simple slickwater-based fracturing *** addition,nanomaterials have proven to be potential solutions or improvements to a number of challenges associated with the *** this paper,molybdenum disulfide(MoS_(2))nanosheets were chemically synthesized by hydrothermal method and applied to improve the performance of conventional slickwater-based fracturing ***,the microstructure characteristics and crystal type of the MoS_(2)nanosheets were analyzed by SEM,EDS,TEM,XPS,and Raman spectroscopy ***,a series of evaluation experiments were carried out to compare the performance of MoS_(2)nanosheet-modified slickwater with the conventional slickwater,including rheology,drag reduction,and sand ***,the enhanced imbibition capacity and potential mechanism of the nanosheet-modified slickwater were systematically *** results showed that the self-synthesized MoS_(2)nanosheets displayed a distinct ultrathin flake-like morphology and a lateral size in the range of tens of *** the nano-composites,each MoS_(2)nanosheet plays the role of cross-linking point,so as to make the spatial structure of the entire system more ***,nanosheet-modified slickwater demonstrates more excellent properties in rheology,drag reduction,and sand *** nanosheet-modified slickwater has a higher apparent viscosity after shearing 120 min under 90℃ and 170 s^(−1).The maximum drag reduction rate achieved 76.3%at 20℃,and the sand settling time of proppants with different mesh in the nano-composites was *** imbibition experiments showed that the gel-breaking fluid of nanosheet-modified slickwater exhibited excellent capability of

关键词： Slickwater-based fracturing fluid MoS_(2)nanosheet Performance evaluation spontaneous imbibition Climbing film