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Optimal configuration of 5G base station energy storage considering sleep mechanism

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Global Energy Interconnection 2022年第1期5卷 66-76页

作者： Xiufan Ma Qiuping Zhu Ying Duan xiangyu meng Zhi Wang School of Electrical and Electronic Engineering North China Electric Power UniversityBeijing 102206P.R.China

The high-energy consumption and high construction density of 5G base stations have greatly increased the demand for backup energy storage *** maximize overall benefits for the investors and operators of base station energy storage,we proposed a bi-level optimization model for the operation of the energy storage,and the planning of 5G base stations considering the sleep mechanism.A multi-base station cooperative system composed of 5G acer stations was considered as the research object,and the outer goal was to maximize the net profit over the complete life cycle of the energy ***,the power and capacity of the energy storage configuration were *** inner goal included the sleep mechanism of the base station,and the optimization of the energy storage charging and discharging strategy,for minimizing the daily electricity expenditure of the 5G base station ***,genetic algorithm and mixed integer programming were used to solve the bi-level optimization model,analyze the numerical example test comparison of the three types of batteries and the net income of the configuration,and finally verify the validity of the ***,the sleep mechanism,the charging and discharging strategy for energy consumption,and the economic benefits for the operators were investigated to provide reference for the 5G base station energy storage configuration.

关键词： 5G base station Sleep mechanism Energy storage configuration Full life cycle Bi-level optimization

Optimal configuration for photovoltaic storage system capacity in 5G base station microgrids

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Global Energy Interconnection 2021年第5期4卷 465-475页

作者： Xiufan Ma Ying Duan xiangyu meng Qiuping Zhu Zhi Wang Sijia Zhu North China Electric Power University Beijing 102206P.R.China State Grid Zhejiang Electric Power Co. Ltd.Maintenance BranchZhejiang 311100P.R.China

Base station operators deploy a large number of distributed photovoltaics to solve the problems of high energy consumption and high electricity costs of 5G base *** this study,the idle space of the base station’s energy storage is used to stabilize the photovoltaic output,and a photovoltaic storage system microgrid of a 5G base station is *** at the capacity planning problem of photovoltaic storage systems,a two-layer optimal configuration method is *** inner layer optimization considers the energy sharing among the base station microgrids,combines the communication characteristics of the 5G base station and the backup power demand of the energy storage battery,and determines an economic scheduling strategy for each photovoltaic storage system with the goal of minimizing the daily operation cost of the base station *** outer model aims to minimize the annual average comprehensive revenue of the 5G base station microgrid,while considering peak clipping and valley filling,to optimize the photovoltaic storage system *** CPLEX solver and a genetic algorithm were used to solve the two-layer *** the construction of the 5G base station in a certain area as an example,the results showed that the proposed model can not only reduce the cost of the 5G base station operators,but also reduce the peak load of the power grid and promote the local digestion of photovoltaic power.

关键词： Photovoltaic Energy storage 5G base station microgrid Bilayer optimization

Calculation Method of Passive Residual Heat Removal Heat Exchanger and Numerical Simulation

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Journal of Power and Energy Engineering 2014年第9期2卷 8-14页

作者： Qiming Men Xuesheng Wang Xiang Zhou xiangyu meng Key Laboratory of Pressure Systems and Safety Ministry of Education East China University of Science and Technology Shanghai China

The tube inside and outside heat transfer mechanism of Passive Residual Heat Removal Heat Exchanger (PRHR HX) was analyzed. The calculation method of this special heat exchanger under natural convection condition in In-containment Refueling Water Storage Tank (IRWST) was carried out. The single-tube coupling model three-dimensional natural circulation in the IRWST was simulated numerically using Fluent. The heat transfer and flow characteristics of the fluid in IRWST were obtained. The comparison of the results between theoretical arithmetic and numerical simulation showed that the theoretical calculation method is suitable for the heat transfer calculation of PRHR HX.

关键词： Passive Residual Heat Removal Heat Exchanger Heat Transfer Calculation Method Numerical Simulation Natural Convection

Cell-free microRNA-21: biomarker for intracranial aneurysm rupture

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Chinese Neurosurgical Journal 2020年第3期6卷 141-151页

作者： Hengwei Jin Yuhua Jiang Xinke Liu xiangyu meng Youxiang Li Department of Interventional Neuroradiology Beijing Neurosurgical Institute and Beijing Tiantan HospitalCapital Medical UniversityNo.119South 4th Ring West RoadFengtai DistrictBeijing 100070China

Background:Deregulation of miRNA-21 expression has been reported to be associated with vascular smooth muscle behavior and cytoskeletal *** study is aimed to investigate the density of serum miRNA-21 in patients with different phases of intracranial aneurysms(IAs)and explore its warning function for IA ***:A total of 16 in 200 IA patients were selected and categorized into 4 groups based on the phase of *** study was carried out using serum miRNA and differentially expressed miRNAs were *** 24 samples from a cohort of 360 patients were added and real-time polymerase chain reaction(RT-PCR)was performed on expanded sample size(n=40)for miRNA-21 *** gene targets of miRNA-21 were screened out from Gene Ontology(GO)database and ***:Microarray study identified 77 miRNAs with significantly different expression levels between experimental groups and the control ***-PCR assays validated significant downregulation of miRNA-21 in experimental groups,among which miRNA-21 expression level of daughter aneurysm group decreased the *** analyses revealed that several target genes related with miRNA-21 may be involved in IA formation and ***:This study suggested that miRNA-21 had a protective effect for intracranial vascular wall against remodeling and warning function for intracranial aneurysm *** suppression of serum miRNA-21 in IA patients may provide diagnostic clues for aneurysm rupture and guide clinical intervention.

关键词： Serum miRNA-21 Intracranial aneurysm Daughter aneurysm Vascular wall remodeling

Impact of multi-valued gossip computational methods on cooperation

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Impact of multi-valued gossip computational methods on coope...

Long-term outcomes of brainstem arteriovenous malformations after different management modalities: a single-centre experience

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作者： xiangyu meng YanLing Zhang ChangYin Sun School of Automation and Electrical Engineering University of Science and Technology Beijing School of Automation Southeast University

Gossip is considered to be an effective mechanism for promoting cooperation, most previous simulation models about gossip usually assume gossip content is expressed in a binary form（good or bad）, which ignores the significance of that gossip content is multi-valued. In this paper, we consider the form of gossiping image score to study multi-valued gossip computational methods. Specifically, during the gossip session, two gossipers first gossip to each other their private image scores to everyone,then private image score matrix are updated together in accordance with the average, maximum and minimum of private image scores between two gossipers. Individual-based simulation and analytical results indicated that the three gossip computational methods will lead to the promotion of cooperation compared to the traditional image score model. Among them, when gossip times are greater than a certain threshold, the promotion of cooperation under the minimum method is highest, followed by the maximum method, the average method is worst, and we introduce the index of average image score, intuitively explained the conclusion. Thus, we can conclude that current results further enrich the form of gossip and explores the impact of different multi-valued gossip computational methods for promoting cooperation.

关键词： Cooperation Evolution Indirect Reciprocity Gossip Image Score

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Stroke & Vascular Neurology 2021年第1期6卷 65-73页

作者： Yu Chen Ruinan Li Li Ma xiangyu meng Debin Yan Hao Wang Xun Ye Hengwei Jin Youxiang Li Dezhi Gao Shibin Sun Ali Liu Shuo Wang Xiaolin Chen Yuanli Zhao Department of Neurosurgery Beijing Tiantan HospitalBeijingChina China National Clinical Research Center for Neurological Diseases BeijingChina Department of Interventional Neuroradiology Beijing Tiantan HospitalBeijingChina Stroke Center Beijing Institute for Brain DisordersBeijingChina Department of Neurosurgery Peking University International HospitalBeijingChina Department of Gamma-Knife Center Beijing Tiantan HospitalBeijingChina

Objective The aims of this study are to clarify the long-term outcomes of brainstem arteriovenous malformations(AVMs)after different management *** The authors retrospectively reviewed 61 brainstem AVMs in their institution between 2011 and *** rupture risk was represented by annualised haemorrhagic *** were divided into five groups:conservation,microsurgery,embolisation,stereotactic radiosurgery(SRS)and embolisation+*** outcomes were evaluated by the modified Rankin Scale(mRS).Subgroup analysis was conducted between different management modalities to compare the long-term outcomes in rupture or unruptured *** All of 61 brainstem AVMs(12 unruptured and 49 ruptured)were followed up for an average of 4.5 *** natural annualised rupture risk was 7.3%,and the natural annualised reruptured risk in the ruptured cohort was 8.9%.13 cases were conservative managed and 48 cases underwent intervention(including 6 microsurgery,12 embolisation,21 SRS and 9 embolisation+SRS).In the selection of interventional indication,diffuse nidus were often suggested conservative management(p=0.004)and nidus involving the midbrain were more likely to be recommended for intervention(p=0.034).The risk of subsequent haemorrhage was significantly increased in partial occlusion compared with complete occlusion and conservative management(p<0.001,p=0.036,respectively).In the subgroup analysis,the follow-up mRS scores of different management modalities were similar whether in the rupture cohort(p=0.064)or the unruptured cohort(p=0.391),as well as the haemorrhage-free survival(p=0.145).In the adjusted Bonferroni correction analysis of the ruptured cohort,microsurgery and SRS could significantly improve the obliteration rate compared with conservation(p<0.001,p=0.001,respectively)and SRS may have positive effect on avoiding new-onset neurofunctional deficit compared with microsurgery and embolisation(p=0.003,p=0.003,respectively).Conclusio

关键词： brainstem modalities conservative

Seawater acidification affects the immune enzyme activities of the Manila clam Ruditapes philippinarum

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Journal of Oceanology and Limnology 2018年第5期36卷 1688-1696页

作者： HUO Zhongming meng xiangyu Md.Golam RBBANI CAO Weinan WU Qidi LI Ying WANG Jingtian YUAN Hongmei YANG Feng YAN Xiwu Engineering Research Center of Shellfish Culture and Breeding in Liaoning Province College of Fisheries and Life Science Dalian Ocean UniversityDalian 116023China

Ocean acidification leads to changes in physiological and immune responses of bivalves, but the eff ect on the immune enzyme activities of the Manila clam, R uditapes philippinarum, when the pH is lower than the normal value has not been studied in detail. In this study, experiments were conducted to determine how pH(7.4, 7.7, 8.0) affects the immune enzyme activities in the gill and hemocytes of the Manila clam. Membrane stability and phagocytosis increased with decrease of pH from 8.0 to 7.7 and then decreased at pH 7.4. The total protein content in the hemocytes and gills decreased with decreasing pH. Lysozyme content in the hemocytes increased with decreasing pH, and the diff erences were significant among the different pH groups(P < 0.05). Adenosine triphosphatase activity at pH 7.4 was significantly higher than in the other two groups, but no significant diff erence was observed between pH 7.7 and 8.0. Catalase activity decreased from pH 8.0 to 7.7 and then increased at pH 7.4, and the dif ferences were significant among the experimental groups( P < 0.05). These findings provide valuable information about the immune response of R. philippinarum to reduced water pH and insights for future research investigating exposure of bivalves to elevated CO_2 conditions.

关键词： seawater acidification immune enzyme Ruditapes philippinarum

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二维催化材料在电解水中的研究进展

科学通报 2017年第27期62卷 3154-3172页

作者：孟祥宇邓德会中国科学院大连化学物理研究所能源材料化学协同创新中心(iChEM)催化基础国家重点实验室大连116023 厦门大学化学化工学院能源材料化学协同创新中心(iChEM)固体表面物理化学国家重点实验室厦门361005 中国科学院大学北京100049

氢能是一种高热值、无污染的洁净能源.电解水制氢被认为是一种有效利用可再生能源,如风能、太阳能等,实现能量储存和转换的前沿科技.二维材料独特的结构和电子特性使其在催化电解水反应中具有广阔的应用前景.本文系统综述了二维材料在... 详细信息

氢能是一种高热值、无污染的洁净能源.电解水制氢被认为是一种有效利用可再生能源,如风能、太阳能等,实现能量储存和转换的前沿科技.二维材料独特的结构和电子特性使其在催化电解水反应中具有广阔的应用前景.本文系统综述了二维材料在催化电解水反应中的两个半反应——阴极析氢反应(HER)和阳极析氧反应(OER)中的关键科学问题和最新进展,并展望了该领域所面临的挑战和机遇.

关键词：二维材料石墨烯水分解电催化析氢反应析氧反应

IGIACP1 predicts the prognosis in multiple myeloma patients

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Oncology and Translational Medicine 2017年第5期3卷 217-220页

作者： xiangyu meng Xiaoping Liu Chunrui Li Cheng Fang Li He Center for Evidence-Based and Translational Medicine Zhongnan Hospital of Wuhan University Wuhan 430071China Department of Hematology Tongji Hospital Tongji Medical College Huazhong University of Science and Technology Wuhan 430030 China Department of Hematology Zhongnan Hospital of Wuhan University Wuhan 430071 China

Objective The aim of this study was to investigate the prognostic relevance of acid phosphatase 1(ACP1) expression in myeloma patients by using Gene Expression Omnibus(GEO) *** A comprehensive search was performed in the GEO database in order to find appropriate datasets. The expression level of ACP1 was extracted from the dataset involving both newly diagnosed and relapsed myeloma patients, and a comparison was made. Clinical follow-up data and ACP1 expression were extracted, and survival analysis of overall survival was performed to compare the high-(top quartile) and low-expression(bottom quartile) groups. Analyses using Kaplan-Meier estimation, log-rank test, and restricted mean survival time(RMST) comparison were *** The GSE 6477 dataset was used to make a comparison of the ACP1 expression levels among patients with newly diagnosed and relapsed myeloma. The ACP1 expression level was significantly higher in the relapsed group than in the newly diagnosed group [mean difference =-262.9, 95% confidence interval(CI) =(-420.2,-105.5), P = 0.002]. The GSE 2658 dataset was used for investigating the prognostic relevance of ACP1 expression in myeloma. The ACP1 high-expression group had a significantly worse prognosis [low vs high: hazard ratio = 0.54, 95% CI =(0.31, 0.95); χ2 = 5.02, log rank P = 0.0314]. The median survival was 55.9 months in the high-expression group and was not reached in the low-expression group. The restricted mean time loss(95% CI) was 11.03(12.97, 23.11) and 18.04(12.97, 23.11) for the low-and high-expression groups, respectively. The ratio of RMST(95% CI) between the two groups(high vs low) was 0.87(0.77, 0.99; P = 0.03).Conclusion Our study, for the first time, showed that ACP1 predicts the prognosis in multiple myeloma patients. Further studies are needed to determine the potential mechanism by which ACP1 is associated with clinical outcomes and should focus on the differential roles of low-molecular-weight protein t

关键词： multiple myeloma prognosis ACP1 low-molecular-weight protein tyrosine phosphatase (LMWPTP)