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Journal of Thermal Science 2022年第3期31卷 650-662页

作者： ge yi HAN Jitian ZHU Xiaoxuan School of Energy and Power Engineering Shandong UniversityJi’nan250061China

The basic organic Rankine cycle(BORC)and ORC with an internal heat exchanger(IHORC)are studied with different working fluids under a given heat source condition to analyse the thermodynamic performances and net power *** results demonstrate that the external exergy efficiency of IHORC is lower than that of BORC while the internal exergy efficiency is on the opposite with the same overall exergy efficiencies.A multi-objective optimization model with inlet pressure and temperature of expander as independent parameters and exergy and heat recovery efficiencies as objective functions is solved by NSGA-II(the second non-dominated sorting genetic algorithm).The Pareto optimal solutions are obtained by the optimization *** calculation with the optimum conditions,it is determined that R236ea has the best comprehensive performance with exergy efficiencies being 40.69%and 41.38%,and heat recovery efficiencies being 83.2%and 75.6%in IHORC and BORC,*** evaporators occupy the maximum exergy destruction,which can be reduced by decreasing pinch point temperatures and increasing evaporation pressures.

关键词： ORC working fluids exergy analysis multi-objective optimization exergy destruction

Essential Players in Cooperative Games with Graph Communication Structure

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Journal of the Operations Research Society of China 2024年第1期12卷 93-108页

作者： Guang Zhang Jing-yi ge Business School University of Shanghai for Science and TechnologyShanghai200093China

A class of cooperative games with graph communication structure is studied in this paper by considering some important players,namely essential *** the assumption that only connected coalitions containing essential players are able to cooperate and obtain their worths,the class of graph games with essential players is proposed as well as an allocation *** proposed value follows the spirit of the Myerson value defined by applying the Shapley value on a modified *** properties,feasible component efficiency,the inessential component property,and fairness,are provided to fully characterize this value,where feasible component efficiency and fairness follows the same ideas of component efficiency and fairness for classical graph games,and the inessential component property says that the total payoffs of the players in a non-feasible component is ***,some computational aspects of the proposed value and comparisons with disjunctive permission value for games with permission structure are also studied,respectively.

关键词： Cooperative game Graph structure Essential player Myerson value Computation Permission structure

Source-less density measurement using an adaptive neutron-induced gamma correction method

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Nuclear Science and Techniques 2023年第8期34卷 115-130页

作者： Qiong Zhang yi ge Yu-Lian Li University of Electronic Science and Technology of China Chengdu 610000China

The use of radioactive isotopes,such as Cs-137,to measure formation density is a common practice;however,it poses high risks such as environmental contamination from lost *** address these challenges,the use of pulsed neutron sources for density measurements,also known as“source-less density”,has emerged as a promising *** collecting gamma counts at different time gates according to the duty cycle of the pulsed sequence,the inelastic gamma component can be isolated to obtain more accurate density ***,the collection of gamma rays during the neutron burst-on period often contains a proportion of capture gamma rays,which can reduce the accuracy of density *** proportion can vary depending on the formation environment and neutron duty *** address these challenges,an adaptive capture gamma correction method was developed for density *** method distinguishes between“burst-on”and“burst-off”periods based on the gamma time spectra,and derives the capture ratio in the burst-on period by iteratively fitting the capture gamma time spectra,resulting in a more accurate net inelastic *** method identifies the end of the pulse by automatically calculating the differential,and fits the capture gamma time spectra using Gaussian process regression,which considers the differences in formation attenuation caused by different *** method was verified through simulations with errors of below 0.025 g/cm3,demonstrating its adaptability and feasibility for use in formation density ***,the proposed method has the potential to minimize the risks associated with radioactive isotopes and improve the accuracy of density measurements in various duty cycles and formation environments.

关键词： Neutron-induced gamma Adaptive correction Source-less density

A method for neutron-induced gamma spectra decomposition analysis based on geant4 simulation

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Nuclear Science and Techniques 2022年第12期33卷 36-48页

作者： Wei Tang Jin-Gang Liang yi ge Qiong Zhang University of Electronic Science and Technology of China Chengdu 610000China Tsinghua University Beijing 10000China

In various monitoring and detection tools that use pulsed neutron generators as radiation sources,the gamma rays induced by the interaction with various nuclei at different stages of neutron transport can reflect information about the *** gamma rays are generated in two major interactions:inelastic scattering of fast neutrons and radiative capture of thermal neutrons,corresponding to the inelastic and capture gamma rays,***,the two types of gamma rays that reflect different properties of the medium are difficult to collect by normal detectors *** proportion of the two gamma rays needs to be solved for the separation of inelastic and capture ***,this study proposes an optimized spectra decomposition method to calculate the inelastic-to-capture ratio in the measured total gamma spectra based on the net inelastic and capture spectra obtained using the geant4 *** the simulated data cannot reflect the energy resolution of the measured spectra,we introduce the Gaussian broadening function of the gamma detector while calculating the proportion of the spectra components,and achieve optimization of the proportion values and resolution parameters *** on the results,the total simulated spectra obtained by superimposing the broadened net inelastic and capture gamma spectra according to the calculated inelastic-to-capture ratio are in good agreement with their measured counterpart.

关键词： Neutron-induced gamma geant4 Spectra analysis

Virome-wide analysis of histone modification mimicry motifs carried by viral proteins

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Virologica Sinica 2024年第5期39卷 793-801页

作者： Yang Xiao Shuofeng Yuan Ye Qiu Xing-yi ge Hunan Provincial Key Laboratory of Medical Virology Institute of Pathogen Biology and ImmunologyCollege of BiologyHunan UniversityChangsha410012China Department of Microbiology LKS Faculty of MedicineThe University of Hong KongHong Kong SAR999077China

Histone mimicry(HM)refers to the presence of short linear motifs in viral proteins that mimic critical regions of host histone *** motifs have the potential to interfere with host cell epigenome and counteract antiviral *** research shows that HM is critical for the pathogenesis and transmissibility of influenza virus and ***,the distribution,characteristics,and functions of HM in eukaryotic viruses remain ***,we developed a bioinformatic pipeline,Histone Motif Scan(HiScan),to identify HM motifs in viral proteins and predict their functions in *** analyzing 592,643 viral proteins using HiScan,we found that putative HM motifs were widely distributed in most viral *** animal viruses,the ratio of HM motifs between DNA viruses and RNA viruses was approximately 1.9:1,and viruses with smaller genomes had a higher density of HM ***,coronaviruses exhibited an uneven distribution of HM motifs,with betacoronaviruses(including most human pathogenic coronaviruses)harboring more HM motifs than other coronaviruses,primarily in the NSP3,S,and N *** summary,our virome-wide screening of HM motifs using HiScan revealed extensive but uneven distribution of HM motifs in most viral proteins,with a preference in DNA *** HM may play an important role in modulating viral pathogenicity and virus-host interactions,making it an attractive area of research in virology and antiviral medication.

关键词： Histone mimicry Viral proteins Histone modification Evolution Coronavirus

Modeling Topic-Based Human Expertise for Crowd Entity Resolution

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Journal of Computer Science & Technology 2018年第6期33卷 1204-1218页

作者： Sai-Sai Gong Wei Hu Wei-yi ge Yu-Zhong Qu State Key Laboratory for Novel Software Technology Nanjing University Nanjing 210023 China Science and Technology on Information Systems Engineering Laboratory Nanjing 210007 China

Entity resolution （ER） aims to identify whether two entities in an ER task refer to the same real-world *** ER uses humans, in addition to machine algorithms, to obtain the truths of ER tasks. However, inaccurate orerroneous results are likely to be generated when humans give unreliable judgments. Previous studies have found thatcorrectly estimating human accuracy or expertise in crowd ER is crucial to truth inference. However, a large number ofthem assume that humans have consistent expertise over all the tasks, and ignore the fact that humans may have variedexpertise on different topics （e.g., music versus sport）. In this paper, we deal with crowd ER in the Semantic Web *** identify multiple topics of ER tasks and model human expertise on different topics. Furthermore, we leverage similartask clustering to enhance the topic modeling and expertise estimation. We propose a probabilistic graphical model thatcomputes ER task similarity, estimates human expertise, and infers the task truths in a unified framework. Our evaluationresults on real-world and synthetic datasets show that, compared with several state-of-the-art approaches, our proposedmodel achieves higher accuracy on the task truth inference and is more consistent with the human real expertise.

关键词： entity resolution crowdsourcing human expertise topic modeling task similarity

Cross-species transmission and host range genes in poxviruses

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Virologica Sinica 2024年第2期39卷 177-193页

作者： Chen-Hui Yang A-Ling Song Ye Qiu Xing-yi ge College of Biology Hunan Provincial Key Laboratory of Medical VirologyHunan UniversityChangsha410012China

The persistent epidemic of human mpox, caused by mpox virus (MPXV), raises concerns about the future spread ofMPXV and other poxviruses. MPXV is a typical zoonotic virus which can infect human and cause smallpox-likesymptoms. MPXV belongs to the Poxviridae family, which has a relatively broad host range from arthropods tovertebrates. Cross-species transmission of poxviruses among different hosts has been frequently reported andresulted in numerous epidemics. Poxviruses have a complex linear double-strand DNA genome that encodeshundreds of proteins. genes related to the host range of poxvirus are called host range genes (HRGs). This reviewbriefly introduces the taxonomy, phylogeny and hosts of poxviruses, and then comprehensively summarizes thecurrent knowledge about the cross-species transmission of poxviruses. In particular, the HRGs of poxvirus aredescribed and their impacts on viral host range are discussed in depth. We hope that this review will provide acomprehensive perspective about the current progress of researches on cross-species transmission and HRGvariation of poxviruses, serving as a valuable reference for academic studies and disease control in the future.

关键词： Poxvirus Host range gene(HRG) Host spectrum Cross-species transmission

Observation of Two-Photon Induced Excited-State Absorption Phenomena in C_(60) and C_(70) Derivatives

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Chinese Physics Letters 2012年第8期29卷 247-249页

作者： OUYANG Xin-Hua LU Liang ge Zi-yi Ningbo Institute of Material Technology and Engineering Chinese Academy of SciencesNingbo 315201

Four fullerene dyads with different cabazole units,named a,b,c,d,were studied by using a femtosecond laser with 780 nm wavelength using Z-scan ***,all of them show strong two-photon induced excited-state absorption behaviors,which were observed firstly in femtosecond *** values of their excited-state absorption cross-section were up to 6.07×10^(-18),7.27×10^(-18),3.86×10^(-18) and 4.51×10^(-18) cm^(-1) for a,b,c,and d,respectively.

关键词： femtosecond methods excited

Quantifying social vulnerability for flood disasters of insurance company

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Journal of Southeast University(English Edition) 2008年第S1期24卷 147-150页

作者： ge, yi Liu, Jing Li, Fengying Shi, Peijun State Key Laboratory of Pollution Control and Resource Reuse Nanjing University Nanjing 210093 China Key Laboratory of Environment Change and Natural Disaster Beijing Normal University Beijing 100875 China State Key Laboratory of Earth Surface Processes and Resource Ecology Beijing Normal University Beijing 100875 China

Social vulnerability assessments are largely ignored when compared with biophysical vulnerability assessments. This is mainly due to the fact that there are more difficulties in quantifying them. Aiming at several pitfalls still existing in the Hoovering approach which is widely accepted, a suitable modified model is provided. In this modified model, the integrated vulnerability is made an analogy to the elasticity coefficient of a spring, and an objective evaluation criterion is established. With the evaluation criterion, the assessment indicators of social vulnerability are filtered and their weight assignments are accomplished. There is an application in the city of Changsha where floods occur often. With the relative data from the PICC Hunan Province Branch, a generalized regression neural network model is established in Matlab 7.0 and used to evaluate a company's flood social vulnerability index (SoVI). The results show that the average flood social vulnerability in Yuhua district is the highest, while Yuelu district is the lowest. It is good for disaster risk management and decision-making of insurance companies.

关键词： social vulnerability index flood insurance generalized regression neural network (GRNN)

Energy Storage in High Variable Renewable Energy Penetration Power Systems:Technologies and Applications

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CSEE Journal of Power and Energy Systems 2023年第6期9卷 2099-2108页

作者： Huan Zhu Hu Li Guojing Liu yi ge Jing Shi Hai Li Ning Zhang State Grid Jiangsu Electric Power Co. LtdNanjingChina Economic Research Institute of State Grid Jiangsu Electric Power Company NanjingChina the State Key Laboratory of Power Systems Department of Electrical EngineeringTsinghua UniversityBeijing 100084China

Integrating variable renewable energy is one of the most effective ways to achieve a low-carbon energy *** high penetration of variable renewable energy,such as wind power and photovoltaic,increases the challenge of balancing the power *** storage technology is regarded as one of the key technologies for balancing the intermittency of variable renewable energy to achieve high *** study reviews the energy storage technology that can accommodate the high penetration of variable renewable *** basic energy storage technologies that can accommodate time-scale variation are reviewed *** role of energy storage in the generation,transmission,distribution,and consumption for the high variable renewable energy penetration system is then *** supporting energy storage policies in the United States,the United Kingdom and China are *** suggestions are proposed from the perspectives of technology,business and *** paper provides guidelines for planning energy storage to enable a high variable renewable energy penetration power system.

关键词： Application scenarios energy storage penetration renewable energy supporting policies