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Effects of Hydrogen Storage System and Renewable Energy Sources for Optimal Bidding Strategy in Electricity Market

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Energy Engineering 2022年第5期119卷 1879-1903页

作者： Can li Xiaode zuo School of Management Jinan UniversityGuangzhou510632China

This work suggested a novel model for obtaining optimum bidding/offering strategy to improve the benefits in case of big *** this regard,several electrical energy resources including:micro turbines,green power sources(wind turbine and photovoltaic system),power storage unit such as Hydrogen storage system with fuel cell,as well as mutual treaties are taken into account in offered *** various models for uncertain parameters based on their natures such as power demand,electricity market tariffs,solar irradiation,temperature and wind speed is one of the contributions of the proposed *** of power demand is modeled by robust optimal method whereas remain uncertain parameters are incorporated in model by stochastic *** of wind speed cased is made by Weibull ***,normal distribution is utilized for production of cases for electricity market tariffs,solar irradiation and *** order to reduce the bidding error loss,the storage devices are corporate with green energy in power unbalanced ***-integer linear programming method is applied for handling of pricing method profiles that have strength against considered uncertainties on power demand of big *** obtained results confirm,the entire electrical energy supplement expenditure of big user in absence of demand uncertainty is$39.63 whereas it is augmented up to$49.47 to achieve robustness *** ***,using of hydrogen storage system by considering the reliability index is reduced the bidding price of the system.

关键词： Bidding uncertain constrains bilateral contracts renewable energy reliability

Safety modeling and protection for lithium-ion batteries based on artificial neural networks method under mechanical abuse

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Science China(Technological Sciences) 2021年第11期64卷 2373-2388页

作者： li YiDing WANG WenWei liN Cheng zuo FengHao National Engineering Laboratory for Electric Vehicles Beijing Institute of TechnologyBeijing 100081China Shenzhen Automotive Research Institute Beijing Institute of TechnologyShenzhen 518118China

The safety of lithium-ion batteries under mechanical abuse has become one of the major obstacles affecting the development of electric vehicles. In this paper, the lithium-ion battery safety model under mechanical abuse conditions is proposed by the Back Propagation Artificial Neural Network(BP-ANN) optimized by the Genetic Algorithm(GA). By experimental and simulation results, the proposed method can effectively predict battery mechanical properties. The corresponding correlation coefficient is greater than 0.99, the failure warning model has more safety margin, and the average security margin is greater than 29%. The multi-source warning weight shows that the mechanical soft short-circuit has the greatest warning margin, followed by that of the soft short-circuit of the electrical signal. The thermal soft short-circuit has the lowest warning margin because of the low thermal conductivity. The qualitative simulation results of the battery module reveal that, when electric vehicles are subjected to mechanical abuse conditions, the rapid reduction in the state-of-charge(SOC) of the rear batteries can effectively increase the reliability of the battery module. The proposed safety model is important to protect the safety and stability of lithium-ion batteries, which is conducive to promoting new energy vehicles and protecting the environment.

关键词： lithium-ion battery GA-BP model failure warning warning weight failure protection

Molecular dissection of complex agronomic traits of rice:a team effort by Chinese scientists in recent years

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National Science Review 2014年第2期1卷 253-276页

作者： Jianru zuo Jiayang li State Key Laboratory of Plant Genomics and National Plant Gene Research Center Institute of Genetics and Developmental Biology Chinese Academy of Sciences

Rice is a staple food for more than half of the worldwide population and is also a model species for biological studies on monocotyledons. hrough a team efort, Chinese scientists have made rapid and important progresses in rice biology in recent years. Here, we briely review these advances, emphasizing on the regulatory mechanisms of the complex agronomic traits that afect rice yield and grain quality. Progresses in rice genome biology and genome evolution have also been summarized.

关键词： complex agronomic traits shoot architecture reproductive development panicle and grain domestication rice

Direct methanol fuel cells system-A review of dual-role electrocatalysts for oxygen reduction and methanol oxidation

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Journal of Materials Science & Technology 2022年第19期114卷 29-41页

作者： Yuanhui zuo Wenchao Sheng Wenquan Tao Zhuo li College of Environment Science and Engineering Tongji UniversityShanghai 200092China

One fundamental challenge in exploiting direct methanol fuel cells(DMFCs)is the preparation of inex-pensive,high active electrocatalysts,which are highly active and durable for the two half-reactions,i.e.,the methanol oxidation reaction(MOR)at the anode and the oxygen reduction reaction(ORR)at the *** group metals-based catalysts have been known the governing dual-functional electro-catalysts based on the literature *** these catalysts are expensive and commercialize the DMFC less *** addition to the high-cost,there are also methanol crossover,CO poisoning,long-term instability,and other problems as for Pt-based *** the dual-role MOR&ORR catalysts,methanol crossover is inevitable to a certain extent on the current development of DMFC with losses in terms of cell *** this regard,one strategy is to exploit high selective anodic/cathodic electrocatalysts to cap-italize the energy density at a high concentration of *** to the summary results,there are mainly two types of dual-role electrocatalysts:one is Pt-support/co-catalyst(designated as P-S/C)for MOR/ORR,the other is catalyst/co-catalyst(designated as C/C)for MOR/*** paper aims to review the design and construction of the various dual-role catalysts and give some discussion briefly.

关键词： DMFC Dual-role Pt-support/co-catalyst Catalyst/co-catalyst MOR/ORR

Constrained Moving Path Following Control for UAV With Robust Control Barrier Function

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IEEE/CAA Journal of Automatica Sinica 2023年第7期10卷 1557-1570页

作者： Zewei Zheng Jiazhe li zhiyuan Guan Zongyu zuo Seventh Research Division School of Automation Science and Electrical EngineeringBeihang UniversityBeijing 100191 Beijing Institute of Control Engineering Beijing 100094China

This paper studies the moving path following(MPF)problem for fixed-wing unmanned aerial vehicle(UAV)under output constraints and wind *** vehicle is required to converge to a reference path moving with respect to the inertial frame,while the path following error is not expected to violate the predefined *** from existing moving path following guidance laws,the proposed method removes complex geometric transformation by formulating the moving path following problem into a second-order time-varying control problem.A nominal moving path following guidance law is designed with disturbances and their derivatives estimated by high-order disturbance *** guarantee that the path following error will not exceed the prescribed bounds,a robust control barrier function is developed and incorporated into controller design with quadratic program based *** proposed method does not require the initial position of the UAV to be within predefined *** the safety margin concept makes error-constraint be respected even if in a noisy *** proposed guidance law is validated through numerical simulations of shipboard landing and hardware-in-theloop(HIL)experiments.

关键词： Moving path following(MPF) robust control barrier function safety margin shipboard landing unmanned aerial vehicle(UAV)

SLA-Aware and Energy-Efficient VM Consolidation in Cloud Data Centers Using Host State 3rd-Order Markov Chain Model

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Chinese Journal of Electronics 2020年第6期29卷 1207-1217页

作者： li lianpeng DONG Jian zuo Decheng JI Songyan Harbin Institute of Technology

Virtual machine(VM) consolidation offers a promising approach to saving energy and improving resource utilization in cloud data ***,the aggressive consolidation of VMs may lead to Servicelevel agreement(SLA) violations,which are essential for data centers and their ***,it is essential to find a tradeoff between the reduction in SLA violation level and energy *** this paper,we improve and expand our Host state 3 rd-order Markov chain(HS3 MC)model proposed in our previous research comprehensively:we propose a new VM selection algorithm,an improved VM placement algorithm,and an HS3 MC-based VM consolidation algorithm based on our improved HS3 MC model for the SLA-aware and energy-efficient consolidation of VMs in cloud data *** evaluate our proposed algorithms on an extended Cloudsim simulator using the PlanetLab workload and a random ***,we improve and expand the OpenStack Neat experimental platform,and evaluate the performance of our algorithms in a real cloud environment based on *** experimental results show that our proposed model can significantly reduce the SLA violation rates while maintaining energy efficiency.

关键词： computer centres cloud computing SLA violation rates consolidation algorithm virtual machine consolidation cloud data centers improved HS3MC model Internet software Host state 3rd-order Markov chain model Computer facilities improving resource utilization VM selection algorithm power aware computing improved VM placement algorithm energy efficiency Computer engineering virtual machines cloud environment energy-efficient VM consolidation SLA-aware Service-level agreement violations Markov processes SLA violation level HS3MC-based resource allocation

Adaptive accurate tracking control of HFVs in the presence of dead-zone and hysteresis input nonlinearities

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Chinese Journal of Aeronautics 2021年第5期34卷 642-651页

作者： Zehong DONG Yinghui li Maolong LV Renwei zuo Graduate College Air Force Engineering UniversityXi'an 710100China Aeronautics Engineering College Air Force Engineering UniversityXi'an 710038China Delft Center for Systems ami Control Delft University of TechnologyMckelweg 2Delft 2628 CDThe Netherlands

A novel accurate tracking controller is developed for the longitudinal dynamics of Hypersonic Flight Vehicles(HFVs)in the presence of large model uncertainties,external disturbances and actuator *** from the state-of-the-art,besides being continuity,no restrictive conditions have been imposed on the HFVs *** system uncertainties are skillfully handled by being seen as bounded"disturbance terms".In addition,by means of backstepping adaptive technique,the accurate tracking(*** errors converge to zero as time approaches infinity)rather than bounded tracking(*** errors converge to residual sets)has been ***’s more,the accurate tracking problems for HFVs subject to actuator dead-zone and hysteresis are discussed,***,all signals of closed-loop system are verified to be Semi-Global Uniformly Ultimate Boundness(SGUUB).Finally,the efficacy and superiority of the developed control strategy are confirmed by simulation results.

关键词： Accurate tracking control Back-stepping control Dead-Zone and hysteresis Hypersonic flight vehicles Non-affine model

Where to go?Predicting next location in IoT environment

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Frontiers of Computer Science 2021年第1期15卷 113-125页

作者： Hao liN Guannan liU Fengzhi li Yuan zuo School of Economics and Management Beihang UniversityBeijing 100191China

Next location prediction has aroused great inter-ests in the era of internet of things(IoT).With the ubiquitous deployment of sensor devices,e.g..GPS and Wi-Fi,loT en-vironment offers new opportunities for proactively analyzing human mobility patterns and predicting user's future visit in low cost,no matter outdoor and *** this paper,we con-sider the problem of next location prediction in loT environ-ment via a session-based *** suggest that user's future intention in each session can be better inferred for more ac-curate prediction if patterns hidden inside both trajectory and signal strength sequences ollected from IoT devices can be jointly modeled,which however existing state-of the-art meth-ods have rarely *** this end,we propose a trajectory and sIgnal sequence(TSIS)model,where the trajectory transi-tion regularities and signal temporal dynamics are jointly embedded in a neural network based ***,we employ gated recurrent unit(GRU)for capturing the temporal dy-namics in the mutivariate signal strength ***,we adapt gated graph neural networks(gated GNNs)on loca-tion transition graphs to explicitly model the transition patterns of ***,both the low-dimensional representa-tions learned from trajectory and signal sequence are jointly optimized to construct a session embedding,which is further employed to predict the next *** experiments on two real-world Wi-Fi based mobility datasets demonstrate that TSIS is effective and robust for next location prediction pompared with other competitive baselines.

关键词： internet of things next location prediction neural networks trajectory signal

A pilot study on combination of cryosurgery and ^(125)iodine seed implantation for treatment of locally advanced pancreatic cancer

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World Journal of Gastroenterology 2008年第10期14卷 1603-1611页

作者： Ke-Cheng Xu li-zhi Niu Yi-Ze Hu Wei-Bing He Yi-Song He Ying-Fei li Jian-Sheng zuo Cryosurgery Center for Cancer Fuda Cancer Hospital Guangzhou Guangzhou 510300 Guangdong ProvinceChina Department of Hepato-biliary Surgery Second affiliated Hospital Guangzhou Medical College Guangzhou 510260 Guangdong Province China Department of Gastroenterology Nanfang Hospital Nanfang Medical university Guangzhou 510515 Guangdong Province China

AIM: To study the therapeutic value of combination o cryosurgery and 125iodine seed implantation for locally advanced pancreatic cancer. METHODS: Forty-nine patients with locally advanced pancreatic cancer (males 36, females 13), with a median age of 59 years, were enrolled in the study. Twelve patients had liver metastases. In all cases the tumors were considered unresectable after a comprehensive evaluation. Patients were treated with cryosurgery, which was performed intraoperatively or percutaneously unde guidance of ultrasound and/or computed tomography (CT), and 125iodine seed implantation, which was performed during cryosurgery or post-cryosurgery under guidance of ultrasound and/or CT. A few patients received regional celiac artery chemotherapy. RESULTS: Thirteen patients received intraoperative cryosurgery and 36 received percutaneous cryosurgery Some patients underwent repeat cryosurgery. 125Iodine seed implantation was performed during freezing procedure in 35 patients and 3-9 d after cryosurgery in 14 cases. Twenty patients, 10 of whom had hepaticmetastases received regional chemotherapy. At 3 mo after therapy, CT was repeated to estimate tumor response to therapy. Most patients showed varying degrees of tumor necrosis. Complete response (CR) of tumor was seen in 20.4% patients, partial response (PR), in 38.8%, stable disease (SD), in 30.6%, and progressive disease (PD), in 10.2%. Adverse effects associated with cryosurgery included upper abdomen pain and increased serum amylase. Acute pancreatitis was seen in 6 patients one of whom developed severe pancreatitis. All adverse effects were controlled by medical management with no poor outcome. There was no therapy-related mortality. During a median follow-up of 18 mo (range of 5-40), the median survival was 16.2 mo, with 26 patients (53.1%) surviving for 12 mo or more. Overall, the 6-, 12-, 24- and 36-mo survival rates were 94.9%, 63.1%, 22.8% and 9.5%, respectively. Eight patients had survival of 24 mo or

关键词： Pancreatic cancer Cryosurgery Cryoablation ^125Iodine seed implantation