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Online algorithms for scheduling with machine activation cost on two uniform machines

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2007年第1期8卷 127-133页

作者： HAN shu-guang JIANG Yi-wei hu Jue-liang Department of Mathematics Zhejiang University Hangzhou 310027 China Faculty of Science Zhej iang Sci- Tech University Hangzhou 310018 China

In this paper we investigate a variant of the scheduling problem on two uniform machines with speeds 1 and s. For this problem, we are given two potential uniform machines to process a sequence of independent jobs. Machines need to be activated before starting to process, and each machine activated incurs a fixed machine activation cost. No machines are initially activated, and when a job is revealed, the algorithm has the option to activate new machines. The objective is to minimize the sum of the makespan and the machine activation cost. We design optimal online algorithms with competitive ratio of (2s+1)/(s+1) for every s≥1.

关键词： Online algorithm Competitive analysis Uniform machine scheduling Machine activation cost

Fractal Dimension of Random Attractors for Non-autonomous Fractional Stochastic Ginzburg–Landau Equations

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Acta Mathematica Sinica,English Series 2020年第3期36卷 318-336页

作者： Chun Xiao GUO Ji shu Xiao hu WANG Department of Mathematics China University of Mining and Technology BeijingBeijing 100083P.R.China School of Mathematical Science and V.C.&V.R.Key Lab Sichuan Normal UniversityChengdu 610068P.R.China Department of Mathematics Sichuan UniversityChengdu 610064P.R.China

This paper considers the dynamical behavior of solutions for non-autonomous stochastic fractional Ginzburg–Landau equations driven by additive noise with α∈(0, 1). First, we give some conditions for bounding the fractal dimension of a random invariant set of non-autonomous random dynamical system. Second, we derive uniform estimates of solutions and establish the existence and uniqueness of tempered pullback random attractors for the equation in H. At last, we prove the finiteness of fractal dimension of random attractors.

关键词： Non-autonomous stochastic fractional Ginzburg–Landau equation random dynamical system random attractor additive noise fractal dimension

Microstructure,Mechanical Properties and Die-Filling Behavior of High-Performance Die-Cast Al-Mg-Si-Mn Alloy

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Acta Metallurgica Sinica(English Letters) 2015年第11期28卷 1344-1353页

作者： Zu-Qi hu Xin-Jian Zhang shu-Sen Wu Institute of Materials China Academy of Engineering Physics State Key Lab of Materials Processing and Die & Mould Technology Huazhong University of Science and Technology

This work aims to reveal the relationships between the microstructure, mechanical properties and flow behavior of die-casting AlMg5Si2Mn alloy. Results indicated that the microstructure of the die-cast AlMgsSi2Mn consists of α1-Al grains, fine-size α2-Al grains and （Al ＋ Mg2Si） eutectic. The surface layer observed has the thickness in a range of 120-135 μm, while an ellipse-like surface layer edge is observed in the corner of the plateqike sample. Tensile strength and elongation （3） of the specimens are slightly decreased along the die-filling direction due to the backflow of melt. Pure （Al ＋ Mg2Si） eutectic layer and ultra-fine-size α2-Al grains observed are around the overflow channels. Mass feeding is predominantly responsible for the superior mechanical properties of the round bars as compared to those of plate-like samples.

关键词： High-pressure die casting Aluminum alloy Microstructure segregations Mechanicalproperties Die-filling behavior Numerical simulation

The regulatory role of Pin1 in neuronal death

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Neural Regeneration Research 2023年第1期18卷 74-80页

作者： shu-Chao Wang Xi-Min hu Kun Xiong Center for Medical Research The Second Xiangya Hospital of Central South UniversityChangshaHunan ProvinceChina Department of Anatomy and Neurobiology School of Basic Medical SciencesCentral South UniversityChangshaHunan ProvinceChina hunan Key Laboratory of Ophthalmology ChangshaHunan ProvinceChina

Regulated cell death predominantly involves apoptosis,autophagy,and regulated *** is vital that we understand how key regulatory signals can control the process of cell ***1 is a cis-trans isomerase that catalyzes the isomerization of phosphorylated serine or threonine-proline motifs of a protein,thereby acting as a crucial molecular switch and regulating the protein functionality and the signaling pathways ***,we know very little about how Pin1-associated pathways might play a role in regulated cell *** this paper,we review the role of Pin1 in regulated cell death and related research progress and summarize Pin1-related pathways in regulated cell *** from the involvement of Pin1 in the apoptosis that accompanies neurodegenerative diseases,accumulating evidence suggests that Pin1 also plays a role in regulated necrosis and autophagy,thereby exhibiting distinct effects,including both neurotoxic and neuroprotective *** an enhanced understanding of Pin1 in neuronal death may provide us with new options for the development of therapeutic target for neurodegenerative disorders.

关键词： apoptosis autophagy calpain central nervous system necroptosis necrosis neurodegenerative diseases neuron Pin1 regulated neuronal death

Soil Salinity Changes Under Cropping with Lycium barbarum *** Irrigation with Saline-Sodic Water

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Pedosphere 2011年第4期21卷 539-548页

作者： DOU Chao-Yin KANG Yao-hu WAN shu-Qin hu Wei Key Laboratory of Water Cycle and Related Land Surface Processes Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences Beijing 100101 (China) Graduate University of Chinese Academy of Sciences Beijing 100049 (China)

In order to utilize the wasted saline-sodic soils under shallow groundwater condition, a 3-year field study was carried in a field cropped with Lycium barbarum L. and irrigated by drip irrigation with saline groundwater under the water table depth of 30-40 cm in the northern Yinchuan Plain, China. Effects of cropping duration （one, two, and three years） on soil salinity, soil solution composition, and pH in three adjacent plots were investigated in 2008. Results showed that a high irrigation frequency maintained high soil water potential and subsequently facilitated infiltration and downward movement of water and salt in the crop root zone. Salt accumulated on the edges of the ridges, and soil saturated-paste electrical conductivity （ECe） was higher in the edge. Concentrations of Na^＋, Ca^2＋, Mg^2＋, Cl^-, and SO24^- in the soil increased with the soil depth as did the ECe, while HCO3 and pH had a relative uniform distribution in soil profile. As planting year increased, the ECe and soil salts in the field had a decreasing tendency, while in the root zone they decreased immediately after irrigation and then remained relatively stable in the following growing seasons. HCO3 and pH had little change with the planting year. Results suggested that the application of drip irrigation with saline water could ameliorate saline-sodic soil and provide a relatively feasible soil environment for saline-sodic soils with shallow groundwater.

关键词： water table the growth of salt-tolerant plant Lycium barbarum L. under the salt accumulation saturated-paste electrical conductivity (ECe) shallow groundwater soil water potential depth

DP-UserPro:differentially private user profile construction and publication

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Frontiers of Computer Science 2021年第5期15卷 197-206页

作者： Zheng huO Ping he Lisha hu huanyu ZHAO Information Technology School Hebei University of Economics and BusinessShijiazhuang 050061China The Institute of Applied Mathematics Hebei Academy of SciencesShijiazhuang 050051China hebei Authentication Technology Engineering Research Center Shijiazhuang 050051China

User profiles are widely used in the age of big ***,generating and releasing user profiles may cause serious privacy leakage,since a large number of personal data are collected and *** this paper,we propose a differentially private user profile construction method DP-UserPro,which is composed of DP-CLIQUE and privately top-κtags ***-CLIQUE is a differentially private high dimensional data cluster algorithm based on *** multidimensional tag space is divided into cells,Laplace noises are added into the count value of each *** on the breadth-first-search,the largest connected dense cells are clustered into a *** a privately top-κtags selection approach is proposed based on the score function of each tag,to select the most importantκtags which can represent the characteristics of the *** and utility of DP-UserPro are theoretically analyzed and experimentally evaluated in the *** experiments are carried out with Tag Suppression algorithm on two real datasets,to measure the False Negative Rate(FNR)and *** results show that DP-UserPro outperforms Tag Suppression by 62.5%in the best case and 14.25%in the worst case on FNR,and DP-UserPro is about 21.1%better on precision than that of Tag Suppression,in average.

关键词： user profile DP-CLIQUE clustering differential privacy recommender system

Sustainable method towards magnetic ordered mesoporous polymers for efficient Methylene Blue removal

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Journal of Environmental Sciences 2021年第1期33卷 168-174页

作者： Lijin huang Man he Beibei Chen Bin hu Key Laboratory of Analytical Chemistry for Biology and Medicine(Ministry of Education) Department of ChemistryWuhan UniversityWuhan 430072China

The difficulty in achieving high removal efficiency for contaminants in textile wastewater over a wide range of p H impedes the progress of its treatment technique ***,a facile and sustainable strategy was adopted for constructing magnetic ordered mesoporous polymers(M-OMPs)without the assistance of organic solvent and *** prepared M-OMPs were endowed with high special surface area and good superparamagnetism simultaneously,and exhibited high removal efficiency(>99%)for Methylene Blue(MB)within a short time(10 min)at a concentration of 50 mg/***’s more,high removal efficiency was achieved over a wide range of p H 2-12 and the adsorption capacity for MB on M-OMPs was substantially retained even after 5 adsorption-desorption cycles,further demonstrating the application potential of M-OMPs in the decontamination of textile wastewater.

关键词： Ordered mesoporous polymers Methylene Blue(MB) Wastewater treatment Solvent-free strategy Magnetic composites

A multi-UAV deployment method for border patrolling based on Stackelberg game

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Journal of Systems Engineering and Electronics 2023年第1期34卷 99-116页

作者： LEI Xing hu Xiaoxuan WANG Guoqiang LUO he School of Management Hefei University of TechnologyHefei 230009China Key Laboratory of Process Optimization&Intelligent Decision-making Ministry of EducationHefei 230009China Engineering Research Center for Intelligent Decision-making&Information Systems Technologies Ministry of EducationHefei 230009China

To strengthen border patrol measures, unmanned aerial vehicles(UAVs) are gradually used in many countries to detect illegal entries on borders. However, how to efficiently deploy limited UAVs to patrol on borders of large areas remains challenging. In this paper, we first model the problem of deploying UAVs for border patrol as a Stackelberg game. Two players are considered in this game: The border patrol agency is the leader,who optimizes the patrol path of UAVs to detect the illegal immigrant. The illegal immigrant is the follower, who selects a certain area of the border to pass through at a certain time after observing the leader’s strategy. Second, a compact linear programming problem is proposed to tackle the exponential growth of the number of leader’s strategies. Third, a method is proposed to reduce the size of the strategy space of the follower. Then, we provide some theoretic results to present the effect of parameters of the model on leader’s utilities. Experimental results demonstrate the positive effect of limited starting and ending areas of UAV’s patrolling conditions and multiple patrolling altitudes on the leader ’s utility, and show that the proposed solution outperforms two conventional patrol strategies and has strong robustness.

关键词： border patrol unmanned aerial vehicle(UAV) Stackelberg game compact linear programming dominated strategy elimination

Ultra-low lattice thermal conductivity and promising thermoelectric figure of merit in borophene via chlorination

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Nano Research 2022年第4期15卷 3804-3811页

作者： Jia he Yanxiao hu Dengfeng Li Jie Chen Center for Phononics and Thermal Energy Science China–EU Joint Lab for NanophononicsSchool of Physics Science and EngineeringTongji UniversityShanghai 200092China School of Science Chongqing University of Posts and TelecommunicationsChongqing 400065China

Monolayer boron-based materials are of current interests due to its ***,motivated by the recent experimental synthesis of semiconducting hydrogenatedαʹ-borophene and the regulation of the physical properties in layered materials by surface functionalization,we study the thermal and electronic properties ofαʹ-borophene with three different types of gas functional groups(H,F,and Cl)based on first-principles and Boltzmann transport *** is found thatαʹ-borophene can be well stabilized by fluorination and chlorination and maintain the semiconductor *** interestingly,when hydrogen is replaced with fluorine or chlorine,the lattice thermal conductivity changes from 24.3 to 5.2 or 0.73 W/(m·K)along armchair direction at 300 K,exhibiting a huge reduction by two orders of *** main reason is the decrease of both phonon group velocities and acoustic phonon relaxation time resulting from the strong phonon mode softening due to the weaken B-B bond strength and heavier atomic mass of fluorine and ***,the chlorinatedαʹ-borophene exhibits a high thermoelectric figure of merit~2 at 300 K along armchair *** study illustrates the importance of the modulation of transport properties by gas functional groups,which may promote the thermoelectric application of boron-based materials.

关键词： borophene thermal transport thermoelectric figure of merit density functional theory gas atom functionalization