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GRU-integrated constrained soft actor-critic learning enabled fully distributed scheduling strategy for residential virtual power plant

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Global Energy Interconnection 2024年第2期7卷 117-129页

作者： Xiaoyun Deng Yongdong Chen Dongchuan Fan Youbo Liu Chao Ma College of Electrical Engineering Sichuan UniversityChengdu 610065P.R.China State Grid Sichuan Comprehensive Energy service Co.Ltd. Chengdu 610072P.R.China

In this study,a novel residential virtual power plant(RVPP)scheduling method that leverages a gate recurrent unit(GRU)-integrated deep reinforcement learning(DRL)algorithm is *** the proposed scheme,the GRU-integrated DRL algorithm guides the RVPP to participate effectively in both the day-ahead and real-time markets,lowering the electricity purchase costs and consumption risks for *** Lagrangian relaxation technique is introduced to transform the constrained Markov decision process(CMDP)into an unconstrained optimization problem,which guarantees that the constraints are strictly satisfied without determining the penalty ***,to enhance the scalability of the constrained soft actor-critic(CSAC)-based RVPP scheduling approach,a fully distributed scheduling architecture was designed to enable plug-and-play in the residential distributed energy resources(RDER).Case studies performed on the constructed RVPP scenario validated the performance of the proposed methodology in enhancing the responsiveness of the RDER to power tariffs,balancing the supply and demand of the power grid,and ensuring customer comfort.

关键词： Residential virtual power plant Residential distributed energy resource Constrained soft actor-critic Fully distributed scheduling strategy

Processing,microstructure,and properties of porous ceramic composites with directional channels

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Journal of Materials Science & Technology 2024年第1期168卷 1-15页

作者： Bo Zhang Yang Yang Xueling Fan Key Laboratory of service Performance and Protection Technology in Extreme Environments Xi’an Jiaotong UniversityXi’an 710049China State Key Laboratory for Strength and Vibration of Mechanical Structures School of Aerospace EngineeringXi’an Jiaotong UniversityXi’an 710049China

Porous ceramic composites with directional microchannels from micrometer to dozens of micrometer levels have attracted more and more attention in various fields including aerospace,biomedicines,and thermal insulation due to their excellent fluid permeability,mechanical properties,*** this article,we summarize the recent directional porous ceramics developments including their main processing routes and respective ***,the properties get from different processing routes have been com-pared and analyzed in terms of microstructures,mechanical properties,and *** has been given to the deeper understanding which can allow one to control the microstructural features of these porous ceramic composites to obtain the desired *** work can provide a useful reference for the development and application of porous ceramic composites with directional microchan-nels.

关键词： Porous ceramic composites Directional microchannels Processing routes Permeability

Highly efficient recognition of similar objects based on ionic robotic tactile sensors

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Science Bulletin 2024年第13期69卷 2089-2098页

作者： Yongkang Kong Guanyin Cheng Mengqin Zhang Yongting Zhao Wujun Meng Xin Tian Bihao Sun Fuping Yang Dapeng Wei Chongqing Key Laboratory of Generic Technology and System of service Robots Chongqing Institute of Green and Intelligent TechnologyChinese Academy of SciencesChongqing 400714China School of Computer Science and Technology Chongqing University of Posts and TelecommunicationsChongqing 400065China

Tactile sensing provides robots the ability of object recognition,fine operation,natural interaction,***,in the actual scenario,robotic tactile recognition of similar objects still faces difficulties such as low efficiency and accuracy,resulting from a lack of high-performance sensors and intelligent recognition *** this paper,a flexible sensor combining a pyramidal microstructure with a gradient conformal ionic gel coating was demonstrated,exhibiting excellent signal-to-noise ratio(48 dB),low detection limit(1 Pa),high sensitivity(92.96 kPa^(-1)),fast response time(55 ms),and outstanding stability over 15,000 compression-release ***,a Pressure-Slip Dual-Branch Convolutional Neural Network(PSNet)architecture was proposed to separately extract hardness and texture features and perform feature *** tactile experiments on different kinds of leaves,a recognition rate of 97.16%was achieved,and surpassed that of human hands recognition(72.5%).These researches showed the great potential in a broad application in bionic robots,intelligent prostheses,and precise human–computer interaction.

关键词： Tactile recognition Conformal ionic gel coating Flexible sensors Dual-branch convolutional neural network

Obstetric References in Disadvantaged Environments: Case of References to the University Hospital Center of Kara, in Northern Togo

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Open Journal of Obstetrics and Gynecology 2024年第2期14卷 267-277页

作者： Kossi Edem Logbo-Akey Bassowa Akila Kofi Mawoulé Améwouho Ketevi Tina Yendoubé Pierre Kambote Dédé Régine Diane Ajavon Baguilane Djoauguibe Abdoul-Samadou Aboubakari Koffi Akpadza service de Gynécologie-Obstétrique CHU Kara Togo service de Gynécologie-Obstétrique CHU Campus Lomé Togo service de Gynécologie-Obstétrique CHU Sylvanus Olympio Lomé Togo service de Gynécologie-Obstétrique CHR Tomdé Kara Togo

Introduction: References are frequent and most often carried out in emergency situations. The objective of this study was to describe the epidemiological and clinical profile of obstetric referrals to the CHU-Kara. Methodology: This was a retrospective cross-sectional descriptive study conducted from September 1, 2022, to February 28, 2023, at CHU-Kara, focusing on obstetric referrals to the Gynecology-Obstetrics department. Result: 828 patients were referred for obstetric reasons out of 1295 admissions, representing a frequency of 63.9%. The average age was 25.04 years. They were primigravida (38.3%), unemployed (62.7%). Motorcycles were the main means of transportation, accounting for 53.1% of cases. The average distance to reach the referral center was 31.6 km, covered in an average of 71 minutes. In 40.7% of cases, patients had less than 4 prenatal consultations and were referred in peripartum (56.6%) for pre-eclampsia (14%), post-term pregnancy (11.8%), dystocia (10.5%). Eighty-six point nine percent (86.9%) of the referred patients were able to deliver during their stay in the department, of which 61.7% had vaginal deliveries. The maternal and perinatal mortality rates were 0.7% and 14.9%, respectively. Conclusion: Obstetric referrals to Kara University Hospital are frequent during the perpartum period and are often carried out by motorbike.

关键词： Obstetric Referral Epidemiology Prognosis CHU-Kara

Stercoral perforation of the cecum:A case report

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World Journal of Gastrointestinal Surgery 2024年第4期16卷 1189-1194页

作者： Hung-Chun Yu Ta-Wei Pu Jung-Cheng Kang Chao-Yang Chen Je-Ming Hu Ruei-Yu Su Department of Surgery Taichung Armed Forces General HospitalTaichung 411228Taiwan Department of Surgery Tri-Service General HospitalNational Defense Medical CenterTaipei 11490Taiwan Division of Colon and Rectal Surgery Department of SurgeryTri-Service General Hospital Songshan BranchNational Defense Medical CenterTaipei 105Taiwan Division of Colon and Rectal Surgery Department of SurgeryTaiwan Adventist HospitalTaipei 105Taiwan Division of Colon and Rectal Surgery Department of SurgeryTri-Service General HospitalNational Defense Medical CenterTaipei 114Taiwan Department of Pathology Tri-Service General HospitalNational Defense Medical CenterTaipei 105Taiwan Department of Pathology and Laboratory Medicine Taoyuan Armed Forces General HospitalTaoyuan 325Taiwan

BACKGROUND With less than 90 reported cases to date,stercoral perforation of the colon is a rare *** ulceration is thought to occur due to ischemic pressure necrosis of the bowel wall,which is caused by the presence of a stercoraceous *** underscore this urgent surgical situation concerning clinical presentation,surgical treatment,and results,we present the case of a 66-year-old man with a stercoral *** SUMMARY A 66-year-old man with a history of hypertension,hyperlipidemia,and gout presented at the emergency department with lower abdominal pain and a low-grade fever lasting for a few *** computed tomography indicated a suspected bezoar(approximately 7.6 cm)in the dilated cecum,accompanied by pericolic fat stranding,mild proximal dilatation of the ileum,pneumoperitoneum,and minimal ***,feculent peritonitis with isolated cecal perforation were ***,a right hemicolectomy with peritoneal lavage was performed.A histopathological examination supported the intraoperative *** In stercoral perforations,a diagnosis should be diligently pursued,especially in older adults,and prompt surgical intervention should be implemented.

关键词： Acute abdomen Colectomy Peritoneal lavage Pneumoperitoneum Bezoars Case report

Sea-level change in coastal areas of China:Status in 2021

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Advances in Climate Change Research 2024年第3期15卷 515-524页

作者： Wen-Shan LI Hui WANG Wen-Xi XIANG Ai-Mei WANG Wei-Qing XU Yu-Xi JIANG Xin-Hui WU Meng-Yuan QUAN National Marine Data and Information service Tianjin 300171China Ocean University of Chin1 Qingdao 266100China University of Michigan‒Shanghai Jiao Tong University Joint Institute Shanghai 200030China

The sea level in coastal areas of China reached the second highest in 2021,just after that recorded in *** force and dynamic analyses based on tide gauges,satellite observations,reanalysis data and regional numerical outputs were conducted to understand these abnormally high sea levels and determine their possible *** show that the coastal sea level of China had increased at an annual rate of 3.4±0.3 mm during 1980-2021,with an acceleration of 0.06±0.02 mm per *** superposition of significant oscillations of quasi-2,3-7,quasi-9,quasi-11,quasi-19 and 20-30 years contributed to the anomalously high sea *** negative-phased El Nino/Southern Oscillation was correlated with the anomalously high sea level and the north-south anti-phase pattern of the coastal sea level in ***,phase lags of 1-4 months occurred with the sea-level *** a decadal timescale,the Pacific Decadal Oscillation(PDO)was negatively correlated with the anomalous mean sea level(MSL),and the negative-phased PDO contributed to the anomalous sea-level change in ***,the monthly MSL peaked in April and July,and the contribution of wind stress to the anomalously high sea level was 38.5%in the south of the Taiwan Strait in April and 30%along the coast of China in *** results were consistent with the tide gauge and satellite *** agreement was also observed between the coastal sea-level fingerprint and the air and sea surface temperatures.

关键词： Sealevel La Nina PDO Wind stress

NFT Security Matrix:Towards Modeling NFT Ecosystem Threat

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Computer Modeling in Engineering & Sciences 2024年第6期139卷 3255-3285页

作者： Peng Liao Chaoge Liu Jie Yin Zhi Wang Xiang Cui Key Laboratory of Trustworthy Distributed Computing and service Beijing University of Posts and TelecommunicationsBeijing100876China Zhongguancun Laboratory Beijing100094China Institute of Information Engineering Chinese Academy of SciencesBeijing100085China

Digital assets have boomed over the past few years with the emergence of Non-fungible Tokens(NFTs).To be specific,the total trading volume of digital assets reached an astounding$55.5 billion in ***,numerous security concerns have been raised by the rapid expansion of the NFT *** holders are exposed to a plethora of scams and traps,putting their digital assets at risk of being ***,academic research on NFT security is scarce,and the security issues have aroused rare *** this study,the NFT ecological process is comprehensively *** process falls into five different stages encompassing the entire lifecycle of ***,the security issues regarding the respective stage are elaborated and analyzed in depth.A matrix model is proposed as a novel contribution to the categorization of NFT security *** data are collected from social networks,the Ethereum blockchain,and NFT markets to substantiate our claims regarding the severity of security concerns in the NFT *** this comprehensive dataset,nine key NFT security issues are identified from the matrix model and then subjected to qualitative and quantitative *** study aims to shed light on the severity of NFT ecosystem security *** findings stress the need for increased attention and proactive measures to safeguard the NFT ecosystem.

关键词： Non-fungible token blockchain cyber security

Ocular syphilis:a case series of four patients and a review of the literature

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Annals of Eye Science 2024年第2期9卷 62-70页

作者： Madeline Beckman Lana M.Rifkin Department of Ophthalmology and Visual Sciences The Ohio State UniversityColumbusOHUSA Ophthalmic Consultants of Boston Uveitis ServiceBostonMAUSA

Background:The incidence of syphilis has been increasing in the United States over the last two decades,with a more recent increase among *** syphilis is an uncommon but important complication of syphilis,most often presenting as posterior or panuveitis in late or latent syphilis of unknown *** ocular syphilis may lead to permanent vision loss,underscoring the importance of appropriate evaluation and treatment of ocular *** Description:In a retrospective,non-contiguous case series,we highlight four patients diagnosed and treated with ocular syphilis at a single *** presentations of ocular syphilis are illustrated:anterior and intermediate uveitis,optic neuritis,posterior uveitis,and *** patients initially presented with a decreased visual acuity(VA).One patient had a previous diagnosis of human immunodeficiency virus(HIV).Three patients were treated with intravenous(IV)penicillin and one patient with IV *** had a return to their baseline VA after their course of ***:Syphilis may go undetected without a high index of clinical suspicion due to its nonspecific *** patients with ocular inflammation should have syphilis testing as a part of their infectious workup with both treponemal and non-treponemal *** diagnosed with syphilis and are not known to be HIV-negative should undergo testing for HIV due to the high rate of *** diagnosis and prompt treatment after onset of symptoms may contribute to a more favorable prognosis for ocular syphilis.

关键词： Ocular syphilis uveitis choroiditis intermediate uveitis case series

How International Tax Rules Adapt to the Development of the Digital Economy: The Perspective of the Republic of Azerbaijan

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Belt and Road Initiative Tax Journal 2024年第1期 106-113页

作者： Lala Babayeva Chingiz Musayev State Tax service Ministry of Economy the Republic of Azerbaijan

This article outlines the significance of the digital economy,highlighting the challenges to taxation,and introducing the focus of the article on Azerbaijan's *** recent decades,the digital revolution has transformed the global economy,reshaping industries,business models,and consumer behavior at an unprecedented *** transformation,commonly referred to as the digital economy,encompasses a broad spectrum of activities ranging from e-commerce and digital services to data analytics and cloud *** the digital economy continues to expand its influence,traditional tax systems face significant challenges in adapting to this new *** has ignited discussions worldwide across various legal and regulatory domains,and international taxation is no *** tax consequences are extensive,impacting both direct and indirect taxation,broader tax policy matters,and tax administration.

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