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Effects of Variant Rates and Noise on Epidemic Spreading

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Chinese Physics Letters 2011年第5期28卷 282-284页

作者： LI Wei GAO Zong-mao gu Jiao Complexity Science Center and Institute of Particle Physics Huazhong Normal UniversityWuhan 430079 Max-Planck-Institute for Mathematics in the Sciences

We introduce variant rates,for both infection and recovery and noise into the susceptible-infected-removed(SIR)modelfor epidemic *** changing rates are taken mainly due to the changing profiles of an epidemic during its ***,the noise parameter which is taken from a given distribution,*** can describe the fluctuations of the infection and recovery *** numerical simulations show that the SIR model with variant rates and noise and can improve the fitting with real SARS data in the near-stationary stage.

关键词： evolution infection epidemic

An effective simplified model of composite compression struts for partially-restrained steel frame with reinforced concrete infill walls

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Earthquake Engineering and Engineering Vibration 2018年第2期17卷 403-415页

作者： Sun guohua Chuang-Sheng Walter Yang gu qiang Reginald DesRoches School of Civil Engineering Suzhou University of Science & Technology School of Civil and Environmental Engineering Georgia Institute of Technology

To resolve the issue regarding inaccurate prediction of the hysteretic behavior by micro-based numerical analysis for partially-restrained（PR）steel frames with solid reinforced concrete（RC）infill walls,an innovative simplified model of composite compression struts is proposed on the basis of experimental observation on the cracking distribution,load transferring mechanism,and failure modes of RC infill walls filled in PR steel *** proposed composite compression struts model for the solid RC infill walls is composed ofαinclined struts and main diagonal ***αinclined struts are used to reflect the part of the lateral force resisted by shear connectors along the frame-wall interface,while the main diagonal struts are introduced to take into account the rest of the lateral force transferred along the diagonal direction due to the complicated interaction between the steel frame and RC infill *** study derives appropriate formulas for the effective widths of theαinclined strut and main diagonal strut,*** example of PR steel frame with RC infill walls simulating simulated by the composite inclined compression struts model is *** maximum lateral strength and the hysteresis curve shape obtained from the proposed composite strut model are in good agreement with those from the test results,and the backbone curve of a PR steel frame with RC infill walls can be predicted precisely when the inter-story drift is within 1%.This simplified model can also predict the structural stiffness and the equivalent viscous damping ratio well when the inter-story drift ratio exceeds 0.5%.

关键词： PR connection steel frame infill walls shear connector hysteretic behavior strut

Defects Energetics and Electronic Properties of Li Doped ZnO： A Hybrid Hartree-Fock and Density Functional Study

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Chinese Journal of Chemical Physics 2012年第3期25卷 261-268,373页

作者： Xu Sun You-song gu Xue-qiang Wang Yue Zhang Department of Material Physics and Chemist04 University of Science and Technology Beijing Beij'ing100083 China

The electronic properties and stability of Li-doped ZnO with various defects have been stud- ied by calculating the electronic structures and defect formation energies via first-principles calculations using hybrid Hartree-Fock and density functional methods. The results from formation energy calculations show that Li pair complexes have the lowest formation energy in most circumstances and they consume most of the Li content in Li doped ZnO, which make the p-type conductance hard to obtain. The formation of Li pair complexes is the main obstacle to realize p-type conductance in Li doped ZnO. However, the formation energy of Lizn decreases as environment changes from Zn-rich to O-rich and becomes more stable than that of Li-pair complexes at highly O-rich environment. Therefore, p-type conductance can be obtained by Li doped ZnO grown or post annealed in oxygen rich atmosphere.

关键词： Li doped ZnO Multi-defects Hybrid density functional

Management of surgical splenorenal shunt-related hepatic myelopathy with endovascular interventional techniques

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World Journal of Gastroenterology 2012年第47期18卷 7104-7108页

作者： mao-qiang Wang Feng-Yong Liu Feng Duan Department of Interventional Radiology Chinese People's Liberation Army General Hospital

We present a case with hepatic myelopathy(HM) due to a surgical splenorenal shunt that was successfully treated by endovascular interventional techniques.A 39-year-old man presented with progressive spastic paraparesis of his lower limbs 14 mo after a splenorenal shunt.A portal venogram identified a widened patent splenorenal *** used an occlusion balloon catheter initially to occlude the *** monitoring of the patient revealed a decrease in his serum ammonia level and an improvement in leg *** then used an Amplatzer vascular plug(AVP) to enable closure of the *** the follow up period of 7 mo,the patient experienced significant clinical improvement and normalization of blood ammonia,without any *** of a surgically created splenorenal shunt with AVP represents an alternative therapy to surgery or coil embolization that can help to relieve shunt-induced HM symptoms.

关键词： Hepatic myelopathy Shunts Portosystemic Hepatic encephalopathy Embolization Endovascular balloon occlusion Interventional procedures Amplatzer vascular plug

Risk-based evaluation on geological environment carrying capacity of mountain city - A case study in Suide County, Shaanxi Province, China

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Journal of Mountain Science 2018年第12期15卷 2730-2740页

作者： WANGYao ZHANG mao-sheng XUE qiang WU Si-duo Development Research Center of China Geological Survey Beijing 100037China Xi'an Center of Geological Survey China Geological SurveyXi'an jiooooChina East China Normal University Shanghai 200062China

With the rapid development and expansion of the cities in China, the carrying capacity of resource and environment has become a huge concern for local governments. From the perspective of geological environment, geological disasters are the main restraining factor of the development in mountain cities. This study was conducted in Suide County of Shaanxi Province with a risk-based approach as followed: a hazard analysis on geological disasters based on a slope geological survey at a scale of 1:10,000; a consequence analysis based on unmanned aerial vehicle(UAV) aerial survey data; integrating the results of hazard analysis and consequence analysis, a risk zonation and analysis of geological disasters in urban areas were completed considering urban planning, land use planning and the safety of infrastructure and major engineering. Subsequently, taking the acceptable levels of human life and property risks incurred by landslides as the criteria of the evaluation of geological environment carrying capacity, a comprehensive assessment of current and future urban carrying capacity was conducted based on the results of the risk analyses. Accordingly, the prior development zone, the restricted development zone and the prohibited zone were delineated, with corresponding suggestions for future urban development. The technological and methodological system used in the study can be applied to geological environment carrying capacity evaluation of other important mountain cities, which can provide scientific basis for the optimization of land and space.

关键词： Mountain cities Risks Geological environment Carrying capacity Evaluation

Epidemic Spreading in a Multi-compartment System

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Chinese Physics Letters 2012年第2期29卷 233-236页

作者： GAO Zong-mao gu Jiao LI Wei College of Physical Science and Technology Huazhong Normal UniversityWuhan 430079 Max-Planck-Institute for Mathematics in the Sciences Leipzig 04103Germany Complexity Science Center&Institute of Particle Physics Huazhong Normal UniversityWuhan 430079

We introduce the variant rate and white noise into the susceptible-infected-removed (SIR) model for epidemics,discuss the epidemic dynamics of a multiple-compartment system,and describe this system by using master *** both the local epidemic spreading system and the whole multiple-compartment system,we find that a threshold could be useful in forecasting when the epidemic ***,numerical simulations show that a model with the variant infection rate and white noise can improve fitting with real SARS data.

关键词： equations system removed

Automated Testing of Web Applications Using Combinatorial Strategies

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Journal of Computer Science & Technology 2017年第1期32卷 199-210页

作者： Xiao-Fang Qi Zi-Yuan Wang Jun-qiang mao Peng Wang School of Computer Science and Engineering Southeast University Nanjing 211189 China Key Laboratory of Computer Network and Information Integration Ministry of Education Nanjing 211189 China School of Computer Science and Technology Nanjing University of Posts and Telecommunications Nanjing 210023 China

Recently, testing techniques based on dynamic exploration, which try to automatically exercise every possible user interface element, have been extensively used to facilitate fully testing web applications. Most of such testing tools are however not effective in reaching dynamic pages induced by form interactions due to their emphasis on handling client-side scripting. In this paper, we present a combinatorial strategy to achieve a full form test and build an automated test model. We propose an algorithm called pairwise testing with constraints （PTC） to iraplement the strategy. Our PTC algorithm uses pairwise coverage and handles the issues of semantic constraints and illegal values. We have implemented a prototype tool ComjaxTest and conducted an empirical study on five web applications. Experimental results indicate that our PTC algorithm generates less form test cases while achieving a higher coverage of dynamic pages than the general pairwise testing algorithm. Additionally, our ComjaxTest generates a relatively complete test model and then detects more faults in a reasonable amount of time, as compared with other existing tools based on dynamic exploration.

关键词： automated testing combinatorial testing web application

Iron oxide nanoparticles:A promising approach for diagnosis and treatment of cardiovascular diseases

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Nano Research 2023年第11期16卷 12453-12470页

作者： Xue Bao Yu mao guangxiang Si Lina Kang Biao Xu Ning gu Cardiovascular Disease Research Center Nanjing Drum Tower HospitalAffiliated Hospital of Medical SchoolMedical SchoolNanjing UniversityNanjing 210093China State Key Laboratory of Bioelectronics Jiangsu Key Laboratory for Biomaterials and DevicesSchool of Biological Sciences and Medical EngineeringSoutheast UniversityNanjing 210096China

Despite advances in diagnostic and therapeutic technologies for cardiovascular diseases(CVDs),it remains a leading cause of mortality and morbidity *** underscores the urgency for innovative approaches aiming at early and precise detection and treatment of CVDs to reduce the disease *** oxide nanoparticles(IONPs),with their unique magnetism and bioproperties,have shown great potential in this *** this review,we will begin with a brief overview of the synthesis and properties of *** will then focus on the latest applications of IONPs in CVDs,including diagnosis and *** use of IONPs in the integration of diagnosis and treatment for CVDs is a promising field,and will be addressed in a separate *** translational potential and challenges of IONPs will also be *** conclusion,ongoing research and development of IONP-based strategies are highly likely to address current challenges effectively,and offer more personalized and efficient options for the diagnosis and treatment of CVDs.

关键词： atherosclerosis cardiovascular disease diagnosis iron oxide nanoparticles theranostic treatment

Transition-Metal-Catalyzed Synthesis of Chiral Allylboronates

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Chinese Journal of Chemistry 2021年第6期39卷 1716-1725页

作者： Wenbo Ming Xiaocui Liu Lujia mao Xiao gu Qing Ye Department of Chemistry Southern University of Science and TechnologyShenzhenGuangdong 518055China

Since the pioneering work on Cr(Ⅲ)-catalyzed enantioselective[4+2]/allylboration reported by Hall and co-workers,a variety of catalytic methodologies for the asymmetric allylic borylation reactions have been developed to provide chiral allylboronates bearing a wide range of functional *** review article describes recent advances in transition-metal catalyzed preparation of chiral allylboronates,especially on those in the past three years,and with the emphasis on the aspect of asymmetric *** to the mechanism of achieving the chemo-,regio-,stereo-and enantioselectivities,the discussion is divided in two parts:substrate-controlled and catalyst-controlled synthesis.

关键词： Allylboronates Homoallyl Alcohols Asymmetric Synthesis Homogeneous Catalysis Transition Metals