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Journal of Energy Chemistry 2022年第6期31卷 450-455,I0013页

作者： Ying Liu Chen hu Ling Chen Yanjie hu hao Jiang Chunzhong Li Key Laboratory for Ultrafine Materials of Ministry of Education School of Materials Science and EngineeringEast China University of Science and TechnologyShanghai 200237China Shanghai Engineering Research Center of Hierarchical Nanomaterials Frontiers Science Center for Materiobiology and Dynamic ChemistrySchool of Chemical EngineeringEast China University of Science and TechnologyShanghai 200237China

Oxygen vacancies (V_(o)) engineering has been deemed to an effective tactic for enhancing Li-ion storage kinetics and reversibility of SnO_(2)-based anode ***,we demonstrated the confinement of ultrahigh V_(o)SnO_(2) nanocrystals into N-doped carbon frameworks to boost their high-rate and cycle *** functional theory (DFT) calculations reveal that abundant V_(o) in SnO_(2) facilitates the adsorption to Li-ion with remarkably increased carrier *** 6.0 nm-sized SnO_(2) particles and the embedded design effectively stabilize the structural integrity during de-/***,the as-formed large hetero-interface also expedites the electron *** merits guarantee its high-rate performance and superior cycling ***,this sample exhibits a high capacity of 1368.9m Ah g^(-1)at 0.1 A g^(-1),and can still maintain 488.5 mAh g^(-1)at 10 A g^(-1)and a long life over 400 cycles at 5 A g^(-1)with 96.6%capacity retention,which is among the best report for Sn-contained anode *** work sheds light on ultrahigh Vo and structural design in conversion-type oxides for highperformance lithium-ion batteries (LIBs).

关键词： Li-ion batteries SnO_(2) Oxygen vacancy Confined synthesis Rate capability

锯齿形氮化铝纳米带负阻器件电子输运性质研究

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原子与分子物理学报 2025年第2期42卷 85-90页

作者：黄绛雪黄启俊何进王豪常胜武汉大学物理科学与技术学院武汉430072

低维纳米带材料因为其结构的特异性而呈现出新奇的物理性质.修饰纳米带的边缘能够调制其电子性质.本文运用基于密度泛函理论(DFT)的第一性原理计算方法,探究了锯齿形氮化铝纳米带(ZAlNNR)单边氟化、单边氯化以及单边氢化的电子结构和输... 详细信息

低维纳米带材料因为其结构的特异性而呈现出新奇的物理性质.修饰纳米带的边缘能够调制其电子性质.本文运用基于密度泛函理论(DFT)的第一性原理计算方法,探究了锯齿形氮化铝纳米带(ZAlNNR)单边氟化、单边氯化以及单边氢化的电子结构和输运特性.研究表明:锯齿型氮化铝纳米带可以通过以上手段实现能带结构的半导体-金属转换.计算电子输运特性,我们发现三种边缘修饰的器件均呈现出负微分电阻效应,其中AlN-F器件有最大峰谷电流比(PVCR),达到了1.78×10^(7),是硅烯纳米器件以及黑磷纳米器件的10^(6)倍.值得一提的是,相比于H-AlN-Cove纳米器件,AlN-F器件能够在更小的偏压范围内实现高PVCR.该结果为锯齿形氮化铝纳米带在低功耗纳米器件中的应用提供了广泛的前景.

关键词：锯齿形氮化铝纳米带电子输运负微分电阻效应第一性原理

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Nutrition status of patients with common cancer in China: gap,mission and challenge

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Science China(Life Sciences) 2021年第11期64卷 1980-1983页

作者： Chunlei hu qi Zhang Hanping Shi Department of Gastrointestinal Surgery Department of Clinical NutritionBeijing Shijitan HospitalCapital Medical UniversityBeijing 100038China Department of Oncology Capital Medical UniversityBeijing 100038China Beijing International Science and Technology Cooperation Base for Cancer Metabolism and Nutrition Beijing 100038China

Malnutrition reduces tolerance and effectiveness of anti-tumor treatment(ANT),increases the risk of complications,medical costs,and death(Arends et al.,2017).About 40%of patients with cancer die because of malnutrition rather than the disease itself(Barton,2017;Roeland et al.,2020).In order to set up a panorama for association among nutrition status,nutrition support treatment(NST),ANT and outcomes in patients with neoplasms,the Chinese Society of Nutritional Oncology(CSNO)conducted a multicenter prospective cohort program called Investigation on Nutrition Status and its Clinical Outcome of Common Cancers(INSCOC)from 2013.

关键词： al. patients neoplasms

Proactive planning of bandwidth resource using simulation-based what-if predictions for Web services in the cloud

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Frontiers of Computer Science 2021年第1期15卷 25-52页

作者： Jianpeng hu Linpeng huANG Tianqi SUN Ying FAN Wenqiang hu hao ZHONG Department of Computer Science and Engineering Shanghai Jiao Tong UniversityShanghai 200240China School of Electronic and Electrical Engineering Shanghai University of Engineering ScienceShanghai 201620China

Resource planning is becoming an increasingly important and timely problem for cloud *** more Web services are moved to the cloud,minimizing network usage is often a key driver of cost *** existing approaches focus on resources such as CPU,memory,and disk I/*** particular,CPU receives the most attention from researchers,but the bandwidth is somehow *** is challenging to predict the network throughput of modem Web services,due to the factors of diverse and complex response,evolving Web services,and complex network *** this paper,we propose a methodology of what-if analysis,named Log2Sim,to plan the bandwidth resource of Web ***2Sim uses a lightweight workload model to describe user behavior,an automated mining approach to obtain characteristics of workloads and responses from massive Web logs,and traffic-aware simulations to predict the impact on the bandwidth consumption and the response time in changing *** use a real-life Web system and a classic benchmark to evaluate Log2Sim in multiple *** evaluation result shows that Log2Sim has good performance in the prediction of bandwidth *** average relative error is 2%for the benchmark and 8% for the real-life *** for the response time,Log2Sim cannot produce accurate predictions for every single service request,but the simulation results always show similar trends on average response time with the increase of workloads in different changing *** can provide sufficient information for the system administrator in proactive bandwidth planning.

关键词： what-if analysis bandwidth management network simulation Web service log mining resource planning evolution OPNET

Characters of surface deformation and surface wave in thermal capillary convection

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Science China(Technological Sciences) 2006年第5期49卷 601-610页

作者： DUAN Li KANG qi hu Wenrei National Microgravity Laboratory/CAS Institute of Mechanics Chinese Academy of Sciences Beijing 100080 China National Microgravity Laboratory/CAS Institute of Mechanics Chinese Academy of Sciences Beijing 100080 China National Microgravity Laboratory/CAS Institute of Mechanics Chinese Academy of Sciences Beijing 100080 China

In the field of fluid mechanics, free surface phenomena is one of the mostimportant physical processes. In the present research work, the surface deformation and surface wavecaused by temperature difference of sidewalls in a rectangular cavity have been investigated. Thehorizontal cross-section of the container is 52 mmx42 mm, and there is a silicon oil layer of height3.5 mm in the experimental cavity. Temperature difference between the two side walls of the cavityis increased gradually, and the flow on the liquid layer will develop from stable convection toun-stable convection. An optical diagnostic system consisting of a modified Michelson interferometerand image processor has been developed for study of the surface deformation and surface wave ofthermal capillary convection. The Fourier transformation method is used to interferometer fringeanalysis. The quantitative results of surface deformation and surface wave have been calculated froma serial of the interference fringe patterns. The characters of surface deformation and surfacewave have been obtained. They are related with temperature gradient and surface tension. Surfacedeformation is fluctuant with time, which shows the character of surface wave. The cycle period ofthe wave is 4.8 s, and the amplitudes are from 0 to 0.55 mu m The phase of the wave near the coolside of the cavity is opposite and correlative to that near the hot side. The present experimentproves that the surface wave of thermal capillary convection exists on liquid free surface, and itis wrapped in surface deformation.

关键词： surface deformation, surface wave, thermocapillary convection, buoyancy convection, optical interferometer.

THE REAL HYPER-ELLIPTIC SUBSPACES OF TEICHMüLLER SPACE AND MODULI SPACE

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Acta Mathematica Scientia 2019年第4期39卷 1121-1135页

作者： Guangming hu Yi qi LMIB School of Mathematics and Systems Science Beihang University

Although the existence and uniqueness of Strebel differentials are proved by Jenkins and Strebel, the specific constructions of Strebel differentials are difficult. Two special kinds of special Strebel differentials are constructed in [5, 6]. The Strebel rays [3] and the eventually distance minimizing rays [9] are important in Teichm¨uller spaces and moduli spaces, respectively. Motivated by the study of [3, 9], two special kinds of Strebel rays in the real hyper-elliptic subspace of Teichm¨uller space and two special kinds of EDM rays in the real hyper-elliptic subspace of moduli space are studied in this article.

关键词： Teichmüller space Strebel ray moduli space EDM ray real hyper-elliptic subspace

Reaction and deactivation kinetics of methanol-to-olefins process based on a special TGA reactor

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Journal of Natural Gas Chemistry 2010年第4期19卷 409-416页

作者： hao hu Weiyong Ying Dingye Fang Engineering Research Center of Large Scale Reactor Engineering and Technology Ministry Education East China University of Science and Technology Shanghai 200237 China State Key Laboratory of Chemical Engineering East China University of Science and Technology Shanghai 200237 China

Thermax 700 thermo gravimetric analysis （TGA） instrument is introduced for the investigation of the reaction and deactivation kinetics of Methanol-to-Olefins （MTO） process with SAPO-34 *** the use of a special sample basket,the TGA instrument can be viewed as a plug flow fixed-bed reactor,while the weight change of SAPO-34 during reaction can be recorded *** data are acquired in the temperature range of 648.2？748.2 K and space velocities of 7.08？35.91 h^-1 （WHSV）.Catalyst activity is expressed with average coke content,and selectivity for different products is related as a function of coke content and *** is also introduced into the lumping kinetic model,and power exponent function with first-order reaction is adopted for model *** function is tested to give the best fit for catalyst activity and product selectivity with the highest correlation *** nicely agreed results between experimental and calculated data suggest that the overall kinetic model would be meaningful in both product distribution prediction and reactor simulation.

关键词： methanol-to-olefins SAPO-34 kinetic model deactivation coking

Irreversible Markov chain Monte Carlo algorithm for self-avoiding walk

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Frontiers of physics 2017年第1期12卷 91-98页

作者： hao hu Xiaosong Chen Youjin Deng National Laboratory for Physical Sciences at Microscale and Department of Modern Physics University of Science and Technology of China Hefei 230026 China State Key Laboratory of Theoretical Physics Institute of Theoretical Physics Chinese Academy of Sciences Beijing 100190 China School of Chemical and Biomedical Engineering Nanyang Technological University Singapore 637459 Singapore

We formulate an irreversible Markov chain Monte Carlo algorithm for the self-avoiding walk （SAW）, which violates the detailed balance condition and satisfies tile balance condition. Its performance improves significantly compared to that of the Berretti-Sokal algorithm, which is a variant of the Metropolis Hastings method. The gained efficiency increases with spatial dimension （D）, from approximately 10 times in 2D to approximately 40 times in 5D. We simulate the SAW on a 5D hypercubic lattice with periodic boundary conditions, for a linear system with a size up to L = 128, and confirm that as for the 5D Ising model, the finite-size scaling of the SAW is governed by renormalized exponents, υ^＊ = 2/d and γ/υ^＊ = d/2. The critical point is determined, which is approximately 8 times more precise than the best available estimate.

关键词： Monte Carlo algorithms self-avoiding walk irreversible balance condition

Coordinated scheduling model of power system with active distribution networks based on multi-agent system

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Journal of Modern Power Systems and Clean Energy 2018年第3期6卷 521-531页

作者： Jingzhe hu hao CONG Chuanwen JIANG School of Electronic Information and Electrical Engineering Shanghai Jiao Tong University

With the large-scale development of distributed generations(DGs) and the connection into the main grid of active distribution networks(ADNs), traditional centralized dispatch of power system has encountered enormous challenge. In a bilateral electricity market, introducing ADN resources in the day-ahead generation schedule will not only enrich the dispatch patterns to the power system,but also reflect the initiative of ADNs. This paper proposes a coordinated scheduling model of power system with a plurality of ADNs based on multi-agent system where ADN agents are brought in the day-ahead market *** process of market clearing and the dispatch of DGs in ADNs are independent with each other but linked together through the market clearing price(MCP) and bid *** optimal operating point of the whole system is achieved through multiple information exchange. In comparison with the dispatch without interaction between ADNs and the market operator(MO), the coordinated scheduling model is applied in a system with four ADNs to verify that the proposed method can improve the overall interests of ADNs. Finally, the effects of storage device and tie-line power limit are analyzed.

关键词： Multi-agent system Active distribution network Market clearing price(MCP) Coordinated scheduling

Costate estimation for dynamic systems of the second order

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Science China(Technological Sciences) 2009年第3期52卷 752-760页

作者： WEN hao JIN DongPing hu HaiYan Institute of Vibration Engineering Research MOE Key Lab of Structure Mechanics and Control for AircraftNanjing University of Aeronautics and AstronauticsNanjing 210016China

The dynamics of a mechanical system in the Lagrange space yields a set of differential equations of the second order and involves much less variables and constraints than that described in the state space. This paper presents a so-called Legendre pseudo-spectral (PS) approach for directly estimating the costates of the Bolza problem of optimal control of a set of dynamic equations of the second order. Under a set of closure conditions, it is proved that the Karush-Kuhn-Tucker (KKT) multipliers satisfy the same conditions as those determined by collocating the costate equations of the second order. Hence, the KKT multipliers can be used to estimate the costates of the Bolza problem via a simple linear map- ping. The proposed approach can be used to check the optimality of the direct solution for a trajectory optimization problem involving the dynamic equations of the second order and to remove any conver- sion of the dynamic system from the second order to the first order. The new approach is demonstrated via two classical benchmark problems.

关键词： costate estimation second order pseudo-spectral method