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| 1 | Modeling and performance analysis of energy selective electron (ESE) engine with heat leakage and transmission probability显示文摘A model of an energy selective electron (ESE) engine with linear heat leakage and Lorentzian transmission probability is established in this paper.The expressions for the main performance parameters of the ESE engine operating as a heat engine or a refrigerator are derived by using the theory of finite time thermodynamics.The optimum performances of the ESE engine are explored and the influences of the heat leakage,the central energy level of the resonance,and the width of the resonance on the performance of the ESE engine are analyzed by using detailed numerical examples.The optimal operation regions of power output and efficiency (or cooling load and coefficient of performance (COP)) are also discussed.Moreover,the performances of the ESE engine with Lorentzian transmission probability are compared with those with rectangular transmission probability.It is shown that the power output versus efficiency (or cooling load versus COP) characteristic curves with and without heat leakage are all closed loop-shaped ones.The efficiency (or COP) of the ESE engine decreases as the heat leakage increases.It is found that as the resonance width increases,the power output and efficiency (or cooling load and COP) increase to a maximum and then decrease due to the finite range of energies which contribute positively to the power generation or refrigeration in the electron system.Especially,when heat leakage is taken into account,the characteristic curves of maximum efficiency (or maximum COP) versus half resonance width are parabolic-like ones,which are quite different from the monotonic decreasing characteristic curves obtained in previous analyses without considering heat leakage.The results obtained in this paper can provide some theoretical guidelines for the design and operation of practical electron energy conversion devices such as solid-state thermionic refrigerators. | DING ZeMin,CHEN LinGen & SUN FengRui College of Naval Architecture and Power,Naval University of Engineering,Wuhan 430033,China Received December 24,2010 accepted May 30,2011 published online September 9,2011 | 2011 | Science China(Physics,Mechanics & Astronomy)2011，54，11： | 14 |
| 2 | Generalized constructal optimization for the secondary cooling process of slab continuous casting based on entransy theory显示文摘Based on constructal theory and entransy theory,a generalized constructal optimization of a solidification heat transfer process of slab continuous casting for a specified total water flow rate in the secondary cooling zone was carried out.A complex function was taken as the optimization objective to perform the casting.The complex function was composed of the functions of the entransy dissipation and surface temperature gradient of the slab.The optimal water distribution at the sections of the secondary cooling zone were obtained.The effects of the total water flow rate in the secondary cooling zone,casting speed,superheat and water distribution on the generalized constructal optimizations of the secondary cooling process were analyzed.The results show that on comparing the optimization results obtained based on the optimal water distributions of the 8 sections in the secondary cooling zone with those based on the initial ones,the complex function and the functions of the entransy dissipation and surface temperature gradient after optimization decreased by 43.25%,5.90%and 80.60%,respectively.The quality and energy storage of the slab had obviously improved in this case.The complex function,composed of the functions of the entransy dissipation and surface temperature gradient of the slab,was a compromise between the internal and surface temperature gradients of the slab.Essentially,it is also the compromise between energy storage and quality of the slab.The'generalized constructal optimization'based on the minimum complex function can provide an optimal alternative scheme from the point of view of improving energy storage and quality for the parameter design and dynamic operation of the solidification heat transfer process of slab continuous casting. | FENG HuiJun CHEN LinGen XIE ZhiHui DING ZeMin SUN FengRui | 2014 | Science China(Technological Sciences)2014，57，4： | 14 |
| 3 | Thermodynamic characteristics of a Brownian heat pump in a spatially periodic temperature field显示文摘This paper has studied the thermodynamic performance of a thermal Brownian heat pump,which consists of Brownian particles moving at a periodic sawtooth potential with external forces and contacting with the alternating hot and cold reservoirs along the space coordinate.The heat flows driven by both potential and kinetic energies are taken into account.The analytical expressions for the heating load,coefficient of performance(COP) and power input of the Brownian heat pump are derived and the performance characteristics are obtained by numerical calculations.It is shown that due to the heat flow via the change of kinetic energy of the particles,the Brownian heat pump is always irreversible and the COP can never attain the Carnot COP.The study has also investigated the influences of the operating parameters,i.e.the external force,barrier height of the potential,asymmetry of the sawtooth potential and temperature ratio of the heat reservoirs,on the performance of the Brownian heat pump.The effective regions of external force and barrier height of the potential in which the Brownian motor can operates as a heat pump are determined.The results show that the performance of the Brownian heat pump greatly depends on the parameters;if the parameters are properly chosen,the Brownian heat pump may be controlled to operate in the optimal regimes. | DING ZeMin,CHEN LinGen & SUN FengRui Postgraduate School,Naval University of Engineering,Wuhan 430033,China | 2010 | Science China(Physics,Mechanics & Astronomy)2010，53，5： | 12 |
| 4 | Fine mapping of locus S-b for F_1 pollen sterility in rice (Oryza sativa L.)显示文摘Hybrid sterility is the main barrier in util-izing the heterosis of subspecies in rice. A knowledge of the underlying molecular mechanism of the hybrid sterility will be useful for overcoming the barrier. In this research, the F1 pollen sterility locus, S-b, was mapped between SSR markers PSM8 and PSM202. To fine map the locus, one F2 mapping population of 3910 plants was developed using the near-isogenic lines of the locus. Ninety-seven recombinants be-tween two markers were selected. Moreover, a series of markers, including two SSR markers, two InDel markers and four CAPS markers, were developed on the region. Linkage analysis showed that marker W4 was co-segregated with locus S-b, while makers A8 and A14 were located on the two sides of the locus with a distance of 0.026 and 0.038 cM, respectively. The markers were then integrated with the se-quences of the clones of the region. Results showed that all the polymorphic markers were anchored on the three end-to-end jointed clones AC093089, AC079021 and AC134931. According to the physical information of the markers, locus S-b was finally de-limited to a region of 27 kb between A8 and A14. Seven ORFs were identified on the region based on the annotation results of RiceGAAS system. These results laid the foundation for further cloning the gene. | LI Wentao ZENG Ruizhen ZHANG Zemin DING Xiaohua ZHANG Guiquan | 2006 | Chinese Science Bulletin2006，51，6： | 12 |
| 5 | Optimal performance regions of an irreversible energy selective electron heat engine with double resonances显示文摘A theoretical model for irreversible double resonance ESE(energy selective electron) device with phonon induced bypass heat leakage which is operating as heat engine system is proposed. The thermodynamic performance is optimized and the impacts of heat leakage and structure parameters of the electron system on its performance are discussed in detail by using FTT(finite time thermodynamics). Moreover, performances of the ESE system with multiple optimization objective functions, including power output, thermal efficiency, ecological function and efficient power, are explored by numerical examples. New optimal performance regions and the selection plans of optimization objective functions of the ESE system are obtained. It reveals that the characteristic of power versus efficiency behave as loop-shaped curves in spite of the heat leakage which will always decrease the efficiency of the electron engine. By properly choosing the design parameters, the ESE engine can be designed to operate at optimal conditions according to different design purpose. The preferred design area should be located between the optimal effective power condition and the optimal ecological function condition. | DING ZeMin CHEN LinGen GE YanLin XIE ZhiHui | 2019 | Science China(Technological Sciences)2019，62，3： | 8 |
| 6 | Performance optimization of thermionic refrigerators based on van der Waals heterostructures显示文摘In this paper, an irreversible thermionic refrigerator model based on van der Waals heterostructure with various irreversibilities is established by utilizing combination of non-equilibrium thermodynamics and finite time thermodynamics. The basic performance characteristics of the refrigerator are obtained. The effects of key factors, such as bias voltages, Schottky barrier heights and heat leakages, on the performance are studied. Results show that cooling rates and coefficients of performances(COPs) can attain the double maximum with proper modulation of barrier heights and bias voltages. Increasing cross-plane thermal resistance as well as decreasing electrode-reservoir thermal resistance and reservoir-reservoir thermal resistance can enhance the performance of the device. The optimal performance region is the interval between the maximum cooling rate point and the maximum COP point. By modulating the bias voltage, the working state of the device can fall into the optimal performance region. The optimal performance of the refrigerator when using single layer graphene and a few layers graphene as electrode material is also compared. | QIU SuSu DING ZeMin CHEN LinGen GE YanLin | 2021 | Science China(Technological Sciences)2021，64，5： | 6 |
| 7 | Performance Optimization of Irreversible Air Heat Pumps Considering Size Effect显示文摘Considering the size of an irreversible air heat pump(AHP), heating load density(HLD) is taken as thermodynamic optimization objective by using finite-time thermodynamics. Based on an irreversible AHP with infinite reservoir thermal-capacitance rate model, the expression of HLD of AHP is put forward. The HLD optimization processes are studied analytically and numerically, which consist of two aspects:(1) to choose pressure ratio;(2) to distribute heat-exchanger inventory. Heat reservoir temperatures, heat transfer performance of heat exchangers as well as irreversibility during compression and expansion processes are important factors influencing on the performance of an irreversible AHP, which are characterized with temperature ratio, heat exchanger inventory as well as isentropic efficiencies, respectively. Those impacts of parameters on the maximum HLD are thoroughly studied. The research results show that HLD optimization can make the size of the AHP system smaller and improve the compactness of system. | BI Yuehong CHEN Lingen DING Zemin SUN Fengrui | 2018 | Journal of Thermal Science2018，27，3： | 3 |
| 8 | Performance optimization of three-terminal energy selective electron generators显示文摘The energy selective electron device works among electron reservoirs with different temperatures and chemical potentials.Electrons obey the Fermi-Dirac distribution,and with the help of resonant filters,a part of electrons with specific energy levels can tunnel among reservoirs and provide current to an external circuit.Herein,an irreversible three-terminal energy selective electron generator model is proposed.Using statistical mechanics and finite-time-thermodynamics,analytical expressions of power and efficiency are derived,and the optimal performance of the device is investigated.Results show that the central energy level difference of filters,the chemical potential difference of low-temperature reservoirs,the interval of mean-central-energy-level of filters and the mean-chemical-potential of low-temperature reservoirs can be optimized to maximize power and efficiency.On the basis of power and efficiency analyses,performance characteristics under different objective functions,including efficient power and ecological function,are discussed and the corresponding optimal performance regions are obtained.The relationship between the entropy generation rate and the efficiency is investigated,and it is shown that the minimum-entropy-generation-state does not coincide with the maximum-efficiency-state. | QIU SuSu DING ZeMin CHEN LinGen GE YanLin | 2021 | Science China(Technological Sciences)2021，64，8： | 2 |
| 9 | Ecological optimization of energy selective electron (ESE) heat engine显示文摘 | Zemin Ding Lingen Chen Fengrui Sun | 2010 | Applied Mathematical Modelling2010，，1： | 1 |
| 10 | Detection of allelic variation at the Wx locus with single-segment substitution lines in rice ( Oryza sativa L.)显示文摘 | Bin Teng Ruizhen Zeng Yicun Wang Ziqiang Liu Zemin Zhang Haitao Zhu Xiaohua Ding Wentao Li Guiquan Zhang | 2012 | Molecular Breeding2012，，： | 1 |
| 11 | Dynamic expression of nine QTLs for tiller number detected with single segment substitution lines in rice显示文摘 | Guifu Liu Ruizhen Zeng Haitao Zhu Zemin Zhang Xiaohua Ding Fangming Zhao Wentao Li Guiquan Zhang | 2009 | Theoretical and Applied Genetics2009，，3： | 1 |
| 12 | Repression of interferon regulatory factor-4(IRF4)hyperactivation restricts murine lupus显示文摘Dear Editor,Hyperactivation of the type I interferon(IFN)signature has been observed in several systemic autoimmune conditions,and the type I IFN receptor antagonist Saphnelo(anifrolumab-fnia)has been approved in 2021 by the Food and Drug Administration(FDA)in the US.The launch of Saphnelo marked the only new treatment approved for systemic lupus erythematosus(SLE)in more than 10 years. | Shijun He Huihua Ding Li Chen Yiwei Shen Yuting Liu Fenghua Zhu Xiaoqian Yang Nan Shen Zemin Lin Jianping Zuo | 2023 | Signal Transduction and Targeted Therapy2023，8，6： | 1 |
| 13 | A generalized model of an irreversible thermal Brownian refrigerator and its performance显示文摘 | Lingen Chen Zemin Ding Fengrui Sun | 2010 | Applied Mathematical Modelling2010，，6： | 1 |
| 14 | Estimation and Long-term Trend Analysis of Surface Solar Radiation in Antarctica: A Case Study of Zhongshan Station显示文摘Long-term,ground-based daily global solar radiation (DGSR) at Zhongshan Station in Antarctica can quantitatively reveal the basic characteristics of Earth’s surface radiation balance and validate satellite data for the Antarctic region.The fixed station was established in 1989,and conventional radiation observations started much later in 2008.In this study,a random forest (RF) model for estimating DGSR is developed using ground meteorological observation data,and a highprecision,long-term DGSR dataset is constructed.Then,the trend of DGSR from 1990 to 2019 at Zhongshan Station,Antarctica is analyzed.The RF model,which performs better than other models,shows a desirable performance of DGSR hindcast estimation with an R^2 of 0.984,root-mean-square error of 1.377 MJ m^(-2),and mean absolute error of 0.828 MJ m^(-2).The trend of DGSR annual anomalies increases during 1990–2004 and then begins to decrease after 2004.Note that the maximum value of annual anomalies occurs during approximately 2004/05 and is mainly related to the days with precipitation (especially those related to good weather during the polar day period) at this station.In addition to clouds and water vapor,bad weather conditions (such as snowfall,which can result in low visibility and then decreased sunshine duration and solar radiation) are the other major factors affecting solar radiation at this station.The high-precision,longterm estimated DGSR dataset enables further study and understanding of the role of Antarctica in global climate change and the interactions between snow,ice,and atmosphere. | Zhaoliang ZENG Zemin WANG Minghu DING Xiangdong ZHENG Xiaoyu SUN Wei ZHU Kongju ZHU Jiachun AN Lin ZANG Jianping GUO Baojun ZHANG | 2021 | Advances in Atmospheric Sciences2021，38，9： | 0 |
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