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Distributionally robust optimization configuration method for island microgrid considering extreme scenarios

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Energy and AI

Energy and AI 2024年第3期17卷 179-194页

作者： Qingzhu Zhang Yunfei mu Hongjie jia Xiaodan Yu Kai Hou Key Laboratory of Smart Grid of Ministry of Education Tianjin UniversityTianjin300072China Key Laboratory of Smart Energy&Information Technology of Tianjin municipality Tianjin UniversityTianjin300072China

The marine climate conditions are intricate and variable. In scenarios characterized by high proportions of wind and solar energy access, the uncertainty regarding the energy sources for island microgrid is significantly exacerbated, presenting challenges to both the economic viability and reliability of the capacity configuration for island microgrids. To address this issue, this paper proposes a distributionally robust optimization (DRo) method for island microgrids, considering extreme scenarios of wind and solar conditions. Firstly, to address the challenge of determining the probability distribution functions of wind and solar in complex island climates, a conditional generative adversarial network (CGAN) is employed to generate a scenario set for wind and solar conditions. Then, by combining k-means clustering with an extreme scenario selection method, typical scenarios and extreme scenarios are selected from the generated scenario set, forming the scenario set for the DRo model of island microgrids. on this basis, a DRo model based on multiple discrete scenarios is constructed with the objective of minimizing the sum of investment costs, operation and maintenance costs, fuel purchase costs, penalty costs of wind and solar curtailment, and penalty costs of load loss. The model is subjected to equipment operation and power balance constraints, and solved using the columns and constraints generation (CCG) algorithm. Finally, through typical examples, the effectiveness of this paper’s method in balancing the economic viability and robustness of the configuration scheme for the island microgrid, as well as reducing wind and solar curtailment and load loss, is verified.

关键词： Island microgrid Extreme scenario Distributionally robust optimization Conditi onal generative adversarial network

The Static Stability Region of an Integrated Electricity-Gas System Considering Voltage and Gas Pressure

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Engineering 2024年第5期36卷 132-145页

作者： Yunfei mu Zhibin Liu Xiangwei Guo Hongjie jia Kai Hou Xiaodan Yu Bofeng Luo Hairun Li Key Laboratory of Smart Grid of Ministry of Education Tianjin UniversityTianjin 300072China State Grid Tianjin Electric Power Company Tianjin 300201China China Southern Power Grid Digital Grid Research Institute Co. Ltd.Guangzhou 510700China

In an integrated electricity-gas system(IEGS),load fluctuations affect not only the voltage in the power system but also the gas pressure in the natural gas *** static voltage stability region(SVSR)method is a tool for analyzing the overall static voltage stability in a power ***,in an IEGS,the SVSR boundary may be overly optimistic because the gas pressure may collapse before the voltage ***,the SVSR method cannot be directly applied to an *** this paper,the concept of the SVSR is extended to the IEGS-static stability region(SSR)while considering voltage and gas ***,criteria for static gas pressure stability in a natural gas system are proposed,based on the static voltage stability criteria in a power ***,the IEGS-SSR is defined as a set of active power injections that satisfies multi-energy flow(MEF)equations and static voltage and gas pressure stability constraints in the active power injection space of natural gas-fired generator units(NGUs).To determine the IEGSSSR,a continuation MEF(CMEF)method is employed to trace the boundary point in one specific NGU scheduling direction.A multidimensional hyperplane sampling method is also proposed to sample the NGU scheduling directions *** obtained boundary points are further used to form the IEGSSSR in three-dimensional(3D)space via a Delaunay triangulation hypersurface fitting ***,the numerical results of typical case studies are presented to demonstrate that the proposed method can effectively form the IEGS-SSR,providing a tool for IEGS online monitoring and dispatching.

关键词： Integrated electricity-gas system Static stability region Continuation multi-energy flow multidimensional hyperplane sampling

Recent advances in electrocatalytic generation of indole-derived radical cations and their applications in organic synthesis

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Chinese Chemical Letters 2024年第4期35卷 106-123页

作者： Wei Zhou Xi Chen Lin Lu Xian-Rong Song mu-jia Luo Qiang Xiao Key Laboratory of organic Chemistry of jiangxi Province Jiangxi Science&Technology Normal UniversityNanchang 330013China

Indole-derived radical cations, open-shell reactive species, display distinctive dual reactivity due to the carbon-centered radical and more electrophilic carbocation, which frequently appear in a variety of single electron oxidation reactions for synthesizing structurally diverse functionalized indoles and indolines. Electrocatalysis is considered as a synthetically attractive and environmentally friendly alternative for driving the single electron oxidation of indoles. Remarkable achievements in electrocatalytic indolederived radical cation-mediated indole functionalization have been realized so far. This review comprehensively summarizes the recent progresses in the applications of electrocatalytic indole radical cations,including C(sp~2)–H functionalization, dearomative 2,3-difunctionalization, and ring-opening reaction, emphasizing the vital single electron oxidation steps of indoles, the substrates scope and limitations, and the reaction mechanisms.

关键词： Electrocatalysis Indole radical cation C-H functionalizatin Dearomative 2 3-difunctionalization

CWGAN-GP with residual network model for lithium-ion battery thermal image data expansion with quantitative metrics

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Energy and AI 2024年第2期16卷 14-23页

作者： Fengshuo Hu Chaoyu Dong Luyu Tian Yunfei mu Xiaodan Yu Hongjie jia School of Electrical and Information Engineering Tianjin UniversityTianjin 300072China Agency for Science Technology and ResearchNanyang Technological University639798Singapore

Lithium batteries find extensive applications in energy *** is a crucial indicator for assessing the state of lithium-ion batteries,and numerous experiments require thermal images of lithium-ion batteries for research ***,acquiring thermal imaging samples of lithium-ion battery faults is challenging due to factors such as high experimental costs and associated *** address this,our study proposes the utilization of a Conditional Wasserstein Generative Adversarial Network with Gradient Penalty and Residual Network(CWGAN-GP with Residual Network)to augment the dataset of thermal images depicting lithium-ion battery *** employ various evaluation metrics to quantitatively analyze and compare the generated thermal images of lithium-ion ***,the expanded dataset,comprising four types of thermal images depicting lithium-ion battery faults,is input into a Mask Region-based Convolutional Neural Network for *** results demonstrate that the proposed model surpasses both traditional Generative Adversarial Network and Wasserstein Generative Adversarial Network in terms of the quality of generated thermal images of lithium-ion ***,the augmentation of the dataset leads to an improvement in the fault diagnosis accuracy of the Mask Region-based Convolutional Neural Network.

关键词： Lithium-ion batteries Generative adversarial network CWGAN-GP

Exposure of benzo[a]pyrene induces HCC exosome-circular RNA to activate lung fibroblasts and trigger organotropic metastasis

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Cancer Communications 2024年第7期44卷 718-738页

作者： Wei mu Pengfei Gu Huating Li Jinjin Zhou Yulun jian Weiping jia Yang Ge School of Public Health Center for Single-cell OmicsShanghai Jiao Tong University School of MedicineShanghaiP.R.China Shanghai Key Laboratory of Diabetes Mellitus Department of Endocrinology and MetabolismShanghai Diabetes InstituteShanghai Clinical Center for DiabetesShanghai Sixth People’s Hospital Affiliated to Shanghai Jiao Tong University School of MedicineShanghaiP.R.China

Background:Benzo[a]pyrene(B[a]P),a carcinogen pollutant produced by combustion processes,is present in the western diet with grilled *** exposure of B[a]P in hepatocellular carcinoma(HCC)cells promotes metastasis rather than primary proliferation,implying an unknown mechanism of B[a]P-induced *** that exosomes carry bioactive molecules to distant sites,we investigated whether and how exosomes mediate cancer-stroma communications for a toxicologically associated ***:Exosomes were isolated from B[a]P stimulated BEL7404 HCC cells(7404-100Bap Exo)at an environmental relevant dose(100 nmol/L).Lung preeducation animal model was prepared via injection of exosomes and *** inflammatory genes of educated lungs were evaluated using quantitative reverse transcription PCR *** LM3 cells transfected with firefly luciferase were next injected to monitor tumor burdens and organotropic *** of B[a]P-exposed exosomes were determined by ceRNA *** between circular RNA(circRNA)and microRNAs(miRNAs)were detected using RNA pull-down in target lung *** in situ hybridization and RNA immunoprecipitation assay was used to evaluate the“on-off”interaction of circRNA-miRNA *** further developed an adenoassociated virus inhalation model to examine mRNA expression specific in lung,thereby exploring the mRNA targets of B[a]P induced circRNA-miRNA ***:Lung fibroblasts exert activation phenotypes,including focal adhesion and motility were altered by 7404-100Bap *** the exosome-educated in vivo model,fibrosis factors and pro-inflammatory molecules of are up-regulated when injected with *** to non-exposed 7404 cells,circ_0011496 was up-regulated following B[a]P treatment and wasmainly packaged into 7404-100Bap *** circ_0011496 were delivered and competitively bound to miR-486-5p in recipient *** down-regulation of miR-486-5p converted fi

关键词： benzo(a)pyrene cancer associate fibroblast circular RNA exosome organotropic metastasis

Treatment of hemolymphangioma by robotic surgery: A case report

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World Journal of Gastrointestinal Surgery 2024年第2期16卷 596-600页

作者： Tian-Ning Li Yan-Hong Liu jia Zhao Hong mu Lei Cao Department of Clinical Lab Tianjin First Central HospitalTianjin 300000China Nankai University Tianjin Union Medical CenterTianjin 300000China Tianjin Medical University Tianjin First Center HospitalTianjin 300000China

BACKGRoUND Hemolymphangioma of the jejunum is rare and lacks clinical specificity,and can manifest as gastrointestinal bleeding,abdominal pain,and intestinal *** tomography,magnetic resonance imaging,and other examinations show certain characteristics of the disease,but lack *** capsule endoscopy and enteroscopy make up for this deficiency,the diagnosis also still re-quires *** SUMMARY A male patient was admitted to the hospital due to abdominal distension and abdominal pain,but a specific diagnosis by computed tomography examination was not *** resection of the small intestine was performed by robotic surgery,and postoperative pathological biopsy confirmed the diagnosis of *** recurrence in the follow-up examination was *** Robotic surgery is an effective way to treat hemolymphangioma through minima-lly invasive techniques under the concept of rapid rehabilitation.

关键词： Hemolymphangioma Enteroscopy Robotic surgery Rehabilitation Case report

Clinical study of neutrophil-to-lymphocyte ratio and platelet-tolymphocyte ratio in hypertriglyceridemia-induced acute pancreatitis and acute biliary pancreatitis with persistent organ failure

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World Journal of Gastrointestinal Surgery 2024年第6期16卷 1647-1659页

作者： mu-Sen Xu jia-Le Xu Xin Gao Shao-jian Mo jia-Yu Xing jia-Hang Liu Yan-Zhang Tian Xi-Feng Fu The Third Hospital of Shanxi Medical University Shanxi Bethune HospitalShanxi Academy of Medical SciencesTongji Shanxi HospitalTaiyuan 030032Shanxi ProvinceChina Department of Environmental Health School of Public HealthShanxi Medical UniversityTaiyuan 030032Shanxi ProvinceChina

BACKGRoUND The neutrophil-to-lymphocyte ratio(NLR)and platelet-to-lymphocyte ratio(PLR)are novel inflammatory indicators that can be used to predict the severity and prognosis of various *** categorize acute pancreatitis by etiology into acute biliary pancreatitis(ABP)and hypertriglyceridemia-induced acute pancreatitis(HTGP).AIM To investigate the clinical significance of NLR and PLR in assessing persistent organ failure(PoF)in HTGP and *** A total of 1450 patients diagnosed with acute pancreatitis(AP)for the first time at Shanxi Bethune Hospital between January 2012 and January 2023 were *** patients were categorized into two groups according to the etiology of AP:ABP in 530 patients and HTGP in 241 *** collected and compared the clinical data of the patients,including NLR,PLR,and AP prognostic scoring systems,within 48 h of hospital *** The NLR(9.1 vs 6.9,P203.1 vs 160.5,Poup than in the HTGP *** the HTGP group,both NLR and PLR were significantly increased in patients with severe AP and those with a SoFA score≥***,in the ABP group,NLR and PLR were significantly elevated in patients with severe AP,modified computed tomography severity index score≥4,Japanese Severity Score≥3,and modified Marshall score≥***,NLR and PLR showed predictive value for the development of PoF in both the ABP and HTGP *** NLR and PLR vary between ABP and HTGP,are strongly associated with AP prognostic scoring systems,and have predictive potential for the occurrence of PoF in both ABP and HTGP.

关键词： Acute pancreatitis Gallstone Hypertriglyceridemia Neutrophil-to-lymphocyte ratio Platelet-to-lymphocyte ratio Persistent organ failure

The dynamic characteristics of saturated remolded loess under cyclic load

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Earthquake Research Advances 2024年第2期4卷 27-35页

作者： Yuting Fu Yanbo Cao jiaxu Kong jia Zheng jiaqi mu Jie Wang jianqi Zhuang College of Geological Engineering and Geomatics Key Laboratory of Western China Mineral Resources and Geological EngineeringChang’an UniversityXi’an710054China

Due to the joint development characteristic and macropore structure of loess,it is easy to cause structure collapse under earthquake or artificial *** study on the loess disaster effect and its mechanism under earthquake action is insufficient due to its ***,to study the deformation and mechanical properties more accurately,the dynamic characteristics of saturated remolded loess under cyclic dynamic load were tested using a GDS dynamic triaxial instrument in this *** test results show that strain and pore water pressure increase gradually at different rates with the development of vibration,and there is an obvious inflection point in the time-history curve of *** the number of vibrations(N)exceeds this point,the strain increases rapidly,and pore water pressure tends to be *** the action of large amplitude and low-frequency dynamic load,the strain and pore water pressure increase rapidly with fewer vibrations and the deviator stress(q)decreases rapidly,while the sample achieves damage faster with the increase of *** the application of a dynamic load,the effective stress(p)gradually decreases and its rate of change slows ***,when the saturated remolded loess is subjected to a constant-amplitude dynamic load,the combination of large amplitude and low frequency leads to the failure of the sample in the shortest time.

关键词： Loess Pore water pressure Strain Frequency Amplitude Quake(vibration)

Heyingwuzi formulation alleviates diabetic retinopathy by promoting mitophagy via the HIF-1α/BNIP3/NIX axis

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World Journal of Diabetes 2024年第6期15卷 1317-1339页

作者： jia-Jun Wu Shu-Yan Zhang Lin mu Zhi-Guo Dong Yin-jian Zhang Department of ophthalmology Longhua Hospital Shanghai University of Traditional Chinese MedicineShanghai 200032China Department of ophthalmology Eye and ENT HospitalFudan UniversityShanghai 200031China

BACKGRoUND Diabetic retinopathy(DR)is the primary cause of visual problems in patients with *** Heyingwuzi formulation(HYWZF)is effective against *** To determine the HYWZF prevention mechanisms,especially those underlying *** Human retinal capillary endothelial cells(HRCECs)were treated with high glucose(hg),HYWZF serum,PX-478,or Mdivi-1 in ***,cell counting kit-8,transwell,and tube formation assays were used to evaluate HRCEC proliferation,invasion,and tube formation,*** electron microscopy was used to assess mitochondrial morphology,and Western blotting was used to determine the protein *** cytometry was used to assess cell apoptosis,reactive oxygen species(RoS)production,and mitochondrial membrane ***,C57BL/6 mice were established in vivo using streptozotocin and treated with HYWZF for four *** glucose levels and body weight were monitored *** in retinal characteristics were evaluated using hematoxylin and eosin,tar violet,and periodic acid-Schiff *** levels in retinal tissues were determined via Western blotting,immunohistochemistry,and *** HYWZF inhibited excessive RoS production,apoptosis,tube formation,and invasion in hg-induced HRCECs via mitochondrial autophagy in *** increased the mRNA expression levels of BCL2-interacting protein 3(BNIP3),FUN14 domain-containing 1,BNIP3-like(BNIP3L,also known as NIX),PARKIN,PTEN-induced kinase 1,and hypoxia-inducible factor(HIF)-1α.Moreover,it downregulated the protein levels of vascular endothelial cell growth factor and increased the light chain 3-II/I ***,PX-478 and Mdivi-1 reversed these ***,PX-478 and Mdivi-1 rescued the effects of HYWZF by decreasing oxidative stress and apoptosis and increasing *** intervention improved the symptoms of diabetes,tissue damage,number of acellular capillaries,and oxidative stress in ***,in vivo

关键词： Diabetic retinopathy HIF-1α/BNIP3/NIX axis Mitophagy Heyingwuzi formulation Traditional Chinese medicine