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Energy Management of Price-maker Community Energy Storage by Stochastic Dynamic Programming

CSEE Journal of Power and Energy Systems 2024年第2期10卷 492-503页

作者： Lirong Deng xuan zhang Tianshu Yang Hongbin Sun Yang Fu Qinglai Guo Shmuel S.Oren Department of Electrical Engineering Shanghai University of Electric PowerShanghai 200000China Tsinghua-Berkeley Shenzhen Institute Tsinghua UniversityShenzhen 518055China Department of Industrial Engineering and Operations Research University of California BerkeleyBerkeleyCAUSA Risk Analytics and Optimization Chair EPFLSwitzerlandand also with Power Systems LaboratoryETH Zurich8092 ZurichSwitzerland State Key Laboratory of Power Systems Department of Electrical EngineeringTsinghua UniversityBeijing 100084China

In this paper,we propose an analytical stochastic dynamic programming(SDP)algorithm to address the optimal management problem of price-maker community energy storage.As a price-maker,energy storage smooths price differences,thus decreasing energy arbitrage value.However,this price-smoothing effect can result in significant external welfare changes by reduc-ing consumer costs and producer revenues,which is not negligible for the community with energy storage systems.As such,we formulate community storage management as an SDP that aims to maximize both energy arbitrage and community welfare.To incorporate market interaction into the SDP format,we propose a framework that derives partial but sufficient market information to approximate impact of storage operations on market prices.Then we present an analytical SDP algorithm that does not require state discretization.Apart from computational efficiency,another advantage of the analytical algorithm is to guide energy storage to charge/discharge by directly comparing its current marginal value with expected future marginal value.Case studies indicate community-owned energy storage that maximizes both arbitrage and welfare value gains more benefits than storage that maximizes only arbitrage.The proposed algorithm ensures optimality and largely reduces the computational complexity of the standard SDP.Index Terms-Analytical stochastic dynamic programming,energy management,energy storage,price-maker,social welfare.

关键词： Analytical stochastic dynamic programming energy management energy storage price-maker social welfare

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Construction of smart propellant with multi-morphologies

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Defence Technology（防务技术） 2024年第3期33卷 180-185页

作者： Weitao Yang Yuchen Gao Rui Hu Manman Li Fengqi Zhao He Jiang xuan zhang Xi’an Modern Chemistry Research Institute Xi’an710065China Northwestern Polytechnical University Xi’an710072China

Smart materials,which exhibit shape memory behavior in response to external stimuli,have shown great potential for use in biomedical applications.In this study,an energetic composite was fabricated using a UV-assisted DIW 3D printing technique and a shape memory material(SMP)as the binder.This composite has the ability to reduce the impact of external factors and adjust gun propellant combustion behavior.The composition and 3D printing process were delineated,while the internal structure and shape memory performance of the composite material were studied.The energetic SMP composite exhibits an angle of reversal of 18 s at 70°,with a maximum elongation typically reaching up to 280% of the original length and a recovery length of approximately 105%during ten cycles.Additionally,thermal decomposition and combustion behavior were also demonstrated for the energetic SMP composite.

关键词： Smart material Gun propellants Multi-morphologies Self-regulation

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Utility of real-time 3D visualization system in the early stage of phacoemulsification training

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International Journal of Ophthalmology(English edition) 2024年第3期17卷 577-582页

作者： Zhe Xu Dan Chen Jing-Wei Xu Yi-xuan Feng Ce Shi Li zhang Wen Xu Eye Center the Second Affiliated HospitalSchool of MedicineZhejiang UniversityHangzhou 310009Zhejiang ProvinceChina Zhejiang Provincial Key Laboratory of Ophthalmology Hangzhou 310009Zhejiang ProvinceChina Zhejiang Provincial Clinical Research Center for Eye Diseases Hangzhou 310009Zhejiang ProvinceChina Zhejiang Provincial Engineering Institute on Eye Diseases Hangzhou 310009Zhejiang ProvinceChina

●AIM:To determine the teaching effects of a real-time three dimensional(3D)visualization system in the operating room for early-stage phacoemulsification training.●METHODS:A total of 10 ophthalmology residents of the first-year postgraduate were included.All the residents were novices to cataract surgery.Real-time cataract surgical observations were performed using a custom-built 3D visualization system.The training lasted 4wk(32h)in all.A modified International Council of Ophthalmology’s Ophthalmology Surgical Competency Assessment Rubric(ICO-OSCAR)containing 4 specific steps of cataract surgery was applied.The self-assessment(self)and expert-assessment(expert)were performed through the microsurgical attempts in the wet lab for each participant.●RESULTS:Compared with pre-training assessments(self 3.2±0.8,expert 2.5±0.6),the overall mean scores of posttraining(self 5.2±0.4,expert 4.7±0.6)were significantly improved after real-time observation training of 3D visualization system(P<0.05).Scores of 4 surgical items were significantly improved both self and expert assessment after training(P<0.05).●CONCLUSION:The 3D observation training provides novice ophthalmic residents with a better understanding of intraocular microsurgical techniques.It is a useful tool to improve teaching efficiency of surgical education.

关键词： 3D visualization system phacoemulsification training wet lab

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Reporting quality evaluation of clinical practice guidelines for pulmonary nodules with the RIGHT checklist

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Chinese Medical Journal 2024年第5期137卷 625-627页

作者： xuan Wu Wenqiang Wang Quncheng zhang Ya Sun Nan Wei Li Yang Yuanjian Yang Huizhen Yang Haiyang Liu Xiaoju zhang Department of Respiratory and Critical Care Medicine Zhengzhou University People’s HospitalHenan Provincial People’s HospitalZhengzhouHenan 450003China Department of Internal Medicine Academy of Medical ScienceZhengzhou UniversityZhengzhouHenan 450001China Department of Internal Medicine Xinxiang Medical UniversityXinxiangHenan 453003China

To the Editor:Pulmonary nodules are defined as localized opacities of up to 30 mm in diameter,surrounded by pulmonary parenchyma or located adjacent to the pleura.^([1])The ideal management for pulmonary nodules is to diagnose and treat malignant nodules as early as possible and minimize radiation exposures,based on the general guidance.Clinical practice guidelines(CPGs)always provide efficient recommendations based on systematic reviews of high-quality evidence and reporting to optimize patient care.^([2])Accumulating evidence shows that adherence to the guidelines improves patient outcomes.^([3])However,the reporting quality of CPGs seems poor.^([4])Several instruments have been generated to evaluate the quality of CPGs.

关键词： pulmonary Clinical clinical

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Knockdown of RCN1 contributes to the apoptosis of colorectal cancer via regulating IP3R1

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BIOCELL 2024年第5期48卷 835-845页

作者： xuan SHI YUFEN WANG CHENYU LI WANGSHU FU XINYUE zhang AIXIA GONG Department of Gastroenterology The First Affiliated Hospital of Dalian Medical UniversityDalianChina Department of Gastroenterology The First Affiliated Hospital of Jinzhou Medical UniversityJinzhouChina The First Clinical College Dalian Medical UniversityDalianChina

Background:The incidence of colorectal cancer(CRC)has been increasing in recent years.Thus,the discovery of factors that can assist in alleviating CRC is urgently warranted.Methods:To identify a potential factor involved in the development of CRC,we screened the upregulated genes in tumor tissues through four datasets from an online database.The expression of reticulocalbin 1(RCN1),a Ca2+-binding protein,was upregulated in the four datasets.Based on loss-offunction experiments,the effect of RCN1 on cell viability was assessed by Cell Counting Kit-8(CCK-8)assay.The regulatory effect of RCN1 on apoptosis was evaluated through Annexin V-fluorescein 5-isothiocyanate(FITC)/propidium iodide(PI)staining assay and terminal deoxynucleotidyl transferase-mediated dUTP nick-end labeling(TUNEL)assay in RKO and SW480 cells.Activation of endoplasmic reticulum(ER)stress signaling pathways was confirmed by estimating the phosphorylation and expression of PRKR-like ER kinase(PERK),inositol-requiring kinase-1(IRE1),transcription factor 6(ACT6),and CCAAT/enhancer-binding protein-homologous protein(CHOP).The intracellular Ca2+homeostasis regulated by RCN1 was determined through the detection of Ca2+concentration and mitochondrial membrane potential(MMP)measurement.Moreover,whether inositol 1,4,5-trisphosphate receptor type 1(IP3R1)was involved in the regulation of RCN1 in CRC was verified through the depletion of IP3R1 in RKO cells.Results:Knockdown of RCN1 reduced cell viability and facilitated apoptosis in RKO and SW480 cells.Phosphorylation of PERK and IRE1,activation of ATF6,and upregulation of CHOP were induced by the absence of RCN1,suggesting that the unfolded protein response(UPR)was activated in CRC cells.The concentration of Ca2+in mitochondria was increased after RCN1 depletion,followed by reduction in the MMP and release of cytochrome c from mitochondria to the cytoplasm in RKO and SW480 cells.Moreover,it was demonstrated that IP3R1 mediates the effect of RCN1 on apoptosis induced by ER stress in CRC cells.The downregulat

关键词： Reticulocalbin 1 Unfolded protein response IP3R1 Colorectal cancer

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Metabolites isolated from Penicillium HDS-Z-1E, an endophytic fungal strain isolated from Taxus cuspidata and their activation effect of catalase

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Chinese Herbal Medicines 2024年第2期16卷 227-230页

作者： Chuan Tang Rui Gao Xiaoyuan Tang Yu zhang Weixing Feng Baomin Feng xuan Lu College of Life and Health Dalian UniversityDalian 116622China

Objective:To study the compounds isolated from Penicillium HDS-Z-1E,an endophytic fungal strain isolated from Taxus cuspidata and their activation effect of catalase(CAT).Methods:The chemical constituents were isolated from Penicillium HDS-Z-1E,by using silica gel,Sephadex LH-20 and HPLC.The structural elucidations of five metabolites were elucidated on the basis of spectroscopic including 1 H-NMR,13C-NMR,HMBC and HSQC.Their activation sites of catalase have been investigated by molecular docking.Results:Five metabolites,compounds(1–5)were isolated from Penicillium HDS-Z-1E and identified as 4-hydroxy-4-methyltetrahydro-2H-pyran-2-one(1),4-hydroxymethyl-5,6-dihydro-pyran-2-one(2),5,6-dihydro-2-oxo-2H-pyran-4-carboxylic(3),N-acetyl-hydrazinobenzoic acid(4),and methyl 2-(2,5-dihydroxyphenyl)acetate(5).Conclusion:Compound 3 is a new compound.Compounds 3 and 4 may have potential activators of catalase,providing a theoretical basis for the development of CAT activators.

关键词： catalase activators 5,6-dihydro-2-oxo-2H-pyran-4-carboxylic molecular simulation penicillium Taxus cuspidata Sieb.et Zucc

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Carbon nanofibers embedded with Fe-Co alloy nanoparticles via electrospinning as lightweight high-performance electromagnetic wave absorbers

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Rare Metals 2024年第6期43卷 2769-2783页

作者： Wen-Jun Cai Jian-Guo Jiang Zi-Dong zhang Zi-xuan Liu Lu-Jie zhang Zhen-Kun Long Ke Bi Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials (Ministry of Education) Shandong University School of Materials Science and Engineering Shandong University Energy Institute Qilu University of Technology (Shandong Academy of Sciences) State Key Laboratory of Information Photonics and Optical Communications School of ScienceBeijing University of Posts and Telecommunications

As a lot of electromagnetic pollution and interference issues have emerged,to overcome electromagnetic interference,prevent electromagnetic hazards,and develop new high-performance electromagnetic wave(EMW) absorbers have become a significant task in the field of materials science.In this paper,a three-dimensional(3D) carbon nanofibers network with core-shell structure,embedded with varied molar ratios of iron and cobalt(4:0,3:1,2:2,1:3,0:4),was effectively synthesized(Fe/Co@C-CNFs) via electrospinning.The phase,microstructure,magnetic and EMW absorption properties were studied.It is discovered that Fe/Co@C-CNFs doped with iron:cobalt=1:1 have excellent EMW absorption capacity.When the matching thickness is 1.08 mm,the minimum reflection loss(RL) value is-18.66 dB,while the maximum effective absorption bandwidth(EAB) reaches 4.2 GHz(13.9-18 GHz) at a thickness of 1.22 mm.This is owing to the absorbers' superior impedance matching and multiple reflections as well as the conductivity,dielectric,and magnetic losses of carbon nanofibers embedded with Fe-Co alloy particles.In addition,the radar cross section(RCS) of the absorbers has been calculated by CST Studio Suite,showing that the absorbing coating can effectively reduce the RCS at various angles,especially for Fe/Co@C-CNFs doped with iron:cobalt=1:1.These findings not only provide new insights for the preparation of light-weight and high-performance electromagnetic wave absorbers,but also contribute to energy storage and conversion.

关键词： Electromagnetic wave (EMW) absorbers Fe/Co@C-CNFs Core–shell structure EMW absorbing mechanism Radar cross section (RCS)

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“Half of the Node Records Are Forged?”: The Problemof Node Records Forgery in Ethereum Network

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Computer Modeling in Engineering & Sciences 2024年第2期138卷 1713-1729页

作者： Yang Liu Zhiyuan Lin Yuxi zhang Lin Jiang xuan Wang School of Computer Science and Technology Harbin Institute of Technology(Shenzhen)Shenzhen518055China Peng Cheng Laboratory Shenzhen518055China Guangdong Provincial Key Laboratory of Novel Security Intelligence Technologies Shenzhen518055China

Ethereum, currently the most widely utilized smart contracts platform, anchors the security of myriad smartcontracts upon its own robustness. Its foundational peer-to-peer network facilitates a dependable node connectionmechanism, whereas an efficient data-sharing protocol constitutes as the bedrock of Blockchain network security.In this paper, we propose NodeHunter, an Ethereum network detector implemented through the application ofsimulation technology, which is capable of aggregating all node records within the network and the interconnectednessbetween them. Utilizing this connection information, NodeHunter can procure more comprehensive insightsfor network status analysis compared to preceding detection methodologies. Throughout a three-month period ofunbroken surveillance of the Ethereum network, we obtained an excess of two million node records along with overone hundred million node acquaintances. Analysis of the gathered data revealed that an alarming 49% or more ofthese node records were maliciously forged.

关键词： Blockchain ethereum peer-to-peer networks node discovery protocol malicious behavior

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Chaiqin Chengqi Decoction as an adjuvant treatment for mild/moderately severe hypertriglyceridemic acute pancreatitis: A retrospective study

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World Journal of Clinical Cases 2024年第11期12卷 1918-1928页

作者： Hai-Fu zhang Ze-xuan Su Yong-Hang Feng Shuo-Jun Li Bi-Yun Xie Department of Internal Medicine The First People's Hospital of FuyangHangzhou 311400Zhejiang ProvinceChina

Hypertriglyceridemia is the third leading cause of acute pancreatitis(AP),and its incidence is increasing.Due to its relatively insidious etiology,it is easy to be ignored in the early stages.In China,Chaiqin Chengqi Decoction(CQCQD)has long been employed for treating AP.AIM To evaluate the effectiveness of CQCQD in patients diagnosed with mild/moderately severe hypertriglyceridemic AP(HTG-AP).METHODS In this study,the clinical data of 39 patients with HTG-AP admitted from January 2019 to November 2022 were collected.The changes of blood lipids,gastrointestinal symptoms,and abdominal pain before and after treatment were analyzed and compared between the two groups.RESULTS Twenty patients were treated with the conventional HTG-AP regimen,and 19 patients were additionally treated with CQCQD.After receiving treatment,the triglycerides(TG)level of the CQCQD group was lower than that of the CQCQD group(3.14±0.25 mmol/L vs 4.96±0.47 mmol/L,P<0.01).After 3 d of treatment,the patients in the CQCQD group had more bowel movements than the control group(2.51±0.25 times vs 1.00±0.17 times,P=0.01).The gastrointestinal function of most patients returned to normal,and the acute gastrointestinal injury score was significantly lower than that of the control group(0.11±0.07 vs 0.42±0.11,P<0.01).CONCLUSION In patients with HTG-AP,CQCQD can significantly reduce the TG level,shorten the recovery time of defecation,significantly improve the gastrointestinal function.

关键词： Hypertriglyceridemic acute pancreatitis Chinese medicine Chaiqin Chengqi Decoction Serum lipid Triglycerides

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An overview of detecting gene-trait associations by integrating GWAS summary statistics and eQTLs

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Science China(Life Sciences) 2024年第6期67卷 1133-1154页

作者： Yang zhang Mengyao Wang Zhenguo Li xuan Yang Keqin Li Ao Xie Fang Dong Shihan Wang Jianbing Yan Jianxiao Liu National Key Laboratory of Crop Genetic Improvement Huazhong Agricultural UniversityWuhan 430070China Key Laboratory of Smart Farming for Agricultural Animals Huazhong Agricultural UniversityWuhan 430070China Hubei Key Laboratory of Agricultural Bioinformatics Huazhong Agricultural UniversityWuhan 430070China College of Informatics Huazhong Agricultural UniversityWuhan 430070China College of Life Sciences Nankai UniversityTianjin 300071China

Detecting genes that affect specific traits(such as human diseases and crop yields)is important for treating complex diseases and improving crop quality.A genome-wide association study(GWAS)provides new insights and directions for understanding complex traits by identifying important single nucleotide polymorphisms.Many GWAS summary statistics data related to various complex traits have been gathered recently.Studies have shown that GWAS risk loci and expression quantitative trait loci(e QTLs)often have a lot of overlaps,which makes gene expression gradually become an important intermediary to reveal the regulatory role of GWAS.In this review,we review three types of gene-trait association detection methods of integrating GWAS summary statistics and e QTLs data,namely colocalization methods,transcriptome-wide association study-oriented approaches,and Mendelian randomization-related methods.At the theoretical level,we discussed the differences,relationships,advantages,and disadvantages of various algorithms in the three kinds of gene-trait association detection methods.To further discuss the performance of various methods,we summarize the significant gene sets that influence highdensity lipoprotein,low-density lipoprotein,total cholesterol,and triglyceride reported in 16 studies.We discuss the performance of various algorithms using the datasets of the four lipid traits.The advantages and limitations of various algorithms are analyzed based on experimental results,and we suggest directions for follow-up studies on detecting gene-trait associations.

关键词： gene-trait association GWAS eQTL colocalization transcriptome-wide association study(TWAS) Mendelian randomization(MR)

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