检索结果-南通市图书馆

Loyal wingman task execution for future aerial combat:A hierarchical prior-based reinforcement learning approach

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Aeronautics 2024年第5期37卷 462-481页

作者： Jiandong ZHANG Dinghan WANG Qiming YANG Zhuoyong SHI Longmeng JI Guoqing SHI yong wu School of Electronics and Information Northwestern Polytechnical UniversityXi’an 710129China

In modern Beyond-Visual-Range(BVR)aerial combat,unmanned loyal wingmen are pivotal,yet their autonomous capabilities are *** study introduces an advanced control algorithm based on hierarchical reinforcement learning to enhance these capabilities for critical missions like target search,positioning,and relay *** on a dual-layer model,the algorithm’s lower layer manages basic aircraft maneuvers for optimal flight,while the upper layer processes battlefield dynamics,issuing precise navigational *** approach enables accurate navigation and effective reconnaissance for lead ***,our Hierarchical Prior-augmented Proximal Policy Optimization(HPE-PPO)algorithm employs a prior-based training,prior-free execution method,accelerating target positioning training and ensuring robust target *** paper also improves missile relay guidance and promotes the effective *** integrating this system with a human-piloted lead aircraft,this paper proposes a potent solution for cooperative aerial *** experiments demonstrate enhanced survivability and efficiency of loyal wingmen,marking a significant contribution to Unmanned Aerial Vehicles(UAV)formation control *** advancement is poised to drive substantial interest and progress in the related technological fields.

关键词： Beyond-visual-range Loyal wingmen Hierarchical prior-augmented proximal policy optimization Unmanned aerial vehicles Warfare

Ionization Potential Depression Model for Warm/Hot and Dense Plasmas

在线全文

学校读者我要写书评

暂无评论

Chinese Physics Letters 2024年第8期41卷 45-57页

作者： Chensheng wu Fuyang Zhou Jun Yan Xiang Gao yong wu Chunhua Zeng Jianguo Wang Institute of Applied Physics and Computational Mathematics Beijing 100088China Faculty of Science Kunming University of Science and TechnologyKunming 650500China

For warm/hot and dense plasmas(WDPs),ionization potential depression(IPD)plays a crucial role in determining its ionization balance and understanding the resultant microscopic plasma properties.A sophisticated and unified IPD model is necessary to resolve those existing discrepancies between theoretical and experimental ***,the applicability of those widely used IPD models nowadays is limited,especially for the nonlocal thermodynamic equilibrium(non-LTE)dense plasma produced by short-pulse *** this work,we propose an IPD model that considers inelastic atomic processes,in which three-body recombination and collision ionization processes are found to play a crucial role in determining the electron distribution and IPD for a *** IPD model is validated by reproducing latest experimental results of Al plasmas with a wide-range condition of 70 eV–700 eV temperature and 0.2–3 times solid density,as well as a typical non-LTE system of hollow Al *** is demonstrated that the present IPD model has a significant temperature dependence due to the consideration of the inelastic collision *** a lower computational cost and wider application range of plasma conditions,the proposed model is expected to provide a promising tool to study the ionization balance and the atomic processes,as well as the related radiation and particle transports properties of the WDP.

关键词： properties. collision determining

Diagnosis of poorly differentiated adenocarcinoma of the stomach by confocal laser endomicroscopy:A case report

在线全文

学校读者我要写书评

暂无评论

World Journal of Clinical Cases 2024年第8期12卷 1481-1486页

作者： Jia-Xin Lou yong wu Muren Huhe Jing-Jie Zhang Dong-wu Jia Zhen-Yu Jiang Department of Gastroenterology The Second Affiliated Hospital of Baotou Medical CollegeInner Mongolia University of Science and TechnologyBaotou 014030Inner Mongolia Autonomous RegionChina Medical Innovation Center The Fourth Military Medical UniversityXi'an 710000Shaanxi ProvinceChina

BACKGROUND In recent years,confocal laser endomicroscopy(CLE)has become a new endoscopic imaging technology at the microscopic level,which is extensively performed for real-time in vivo histological *** can be performed to distinguish benign from malignant *** this study,we diagnosed using CLE an asymptomatic patient with poorly differentiated gastric *** SUMMARY A 63-year-old woman was diagnosed with gastric mucosal lesions,which may be gastric cancer,in the small curvature of the stomach by *** consented to undergo CLE for morphological observation of the gastric *** the combination of CLE diagnosis and postoperative pathology,the intraoperative CLE diagnosis was considered to be *** to our experience,CLE can be performed as the first choice for the diagnosis of gastric *** CLE has several advantages over pathological *** believe that CLE has great potential in the diagnosis of benign and malignant gastric lesions.

关键词： Confocal laser endomicroscopy Poorly differentiated gastric adenocarcinoma Diagnosis Early stage Case report

Cooperative NHC/Photoredox Catalysis:Three-Component Reaction of Aroyl Fluorides,Styrenes and Oxalates

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Chemistry 2024年第5期42卷 511-515页

作者： Zheng Lin Guanghui Lv Jianghong Liu Jiangyan Tang Binsong Mu Jian Chen Tianle Huang Zhongzhen Yang yong wu Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry and Sichuan Province Sichuan Engineering Laboratory for Plant-Sourced Drug and Sichuan Research Center for Drug Precision Industrial TechnologyWest China School of PharmacySichuan UniversityChengduSichuan610041 China Department of Pharmacy Hubei Provincial Clinical Research Center for Umbilical Cord Blood Hematopoietic Stem CellsTaihe HospitalHubei University of MedicineShiyanHubei442000 China

Cooperative NHC/photoredox catalysis has emerged as an important research field in recent ***,this article describes the use of cesium salt derivatives of tert-alcohols as alkyl radical precursors in a three-component reaction with styrene and aromatic acyl fluorides to synthesizeα-arylalkyl aryl *** aroyl fluoride reacts with the NHC catalyst,leading to the formation of an acyl azolium *** acyl azolium ion can then be reduced by the photoredox catalyst,generating the corresponding ketyl radical *** C-radical generated from oxalate oxidation undergoes an addition reaction with the styrene derivative,followed by cross-coupling of the addition radical with the ketone radical,which is fragmented by NHC to give the target ketone.

关键词： Three-component Photoredox NHC Aryl ketones Iridium Radical C—C coupling Amides

Percutaneous ultrasound-guided coaxial core needle biopsy for the diagnosis of multiple splenic lesions: A case report

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Gastrointestinal Surgery 2024年第2期16卷 616-621页

作者： Sha-Hong Pu wu-yong-Ga Bao Zhen-Peng Jiang Rui Yang Qiang Lu Department of Medical Ultrasound West China Hospital of Sichuan UniversityChengdu 610041Sichuan ProvinceChina

BACKGROUND The overlap of imaging manifestations among distinct splenic lesions gives rise to a diagnostic ***,a definitive diagnosis primarily relies on his-tological *** ultrasound(US)-guided coaxial core needle biopsy(CNB)not only procures sufficient tissue to help clarify the diagnosis,but reduces the incidence of puncture-related *** SUMMARY A 41-year-old female,with a history of pulmonary tuberculosis,was admitted to our hospital with multiple indeterminate splenic ***-scale ultrasono-graphy demonstrated splenomegaly with numerous well-defined hypoechoic *** contrast-enhanced computed tomography(CT)showed an en-larged spleen with multiple irregular-shaped,peripherally enhancing,hypodense *** emission CT revealed numerous abnormal hyperglycemia *** imaging findings strongly indicated the possibility of infectious disease as the primary concern,with neoplastic lesions requiring *** obtain the precise pathological diagnosis,the US-guided coaxial CNB of the spleen was ca-rried *** patient did not express any discomfort during the *** Percutaneous US-guided coaxial CNB is an excellent and safe option for obtaining precise splenic tissue samples,as it significantly enhances sample yield for exact pathological analysis with minimum trauma to the spleen parenchyma and sur-rounding tissue.

关键词： Spleen Splenic disease Ultrasound Biopsy Ultrasound-guided coaxial core needle biopsy Case report

Mild construction of N-fused polycyclic compounds via Rh(Ⅲ)/EosinY co-catalyze C—H activation

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Green Synthesis and Catalysis

Green Synthesis and Catalysis 2024年第2期5卷 108-111页

作者： Zhouping wu Guanghui Lv Zheng Lin Jiangyan Tang Jian Chen Jianghong Liu Li Hai yong wu Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry and Sichuan Province Sichuan Engineering Laboratory for Plant-Sourced Drug and Sichuan Research Center for Drug Precision Industrial TechnologyWest China School of PharmacySichuan UniversityChengdu 610041China Department of Pharmacy Taihe HospitalHubei University of MedicineNo.32 South Renmin RoadShiyan 442000China

The construction of N-fused polycyclic compounds at room temperature via the combination of transition-metal catalyst and photocatalyst has been *** novel work has successfully realized LED irradiated C—H activation of iodonium *** strategy shows wide substrate scope and ideal functional group *** work would be useful for the construction of various heterocyclic compounds.

关键词： N-fused polycyclic compounds C—H activation Rh(Ⅲ)catalyst and photocatalyst Iodonium ylides Energy transfer process

Rhodium-catalyzed Doyle-Kirmse rearrangement reactions of sulfoxoniun ylides

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2024年第4期35卷 363-366页

作者： Ying-Di Hao Zhi-Qian Lin Xiao-Yu Guo Jiao Liang Can-Kun Luo Qian-Tao Wang Li Guo yong wu Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry and Department of Medicinal Chemistry Sichuan Engineering Laboratory for Plant-Sourced Drug and Sichuan Research Center for Drug Precision Industrial TechnologyWest China School of PharmacySichuan UniversityChengdu 610041China

Doyle-Kirmse rearrangement reactions have received continuous attention as an important method for constructing complex chemical structures. Herein, we disclosed an efficient rhodium-catalyzed DoyleKirmse rearrangement reaction, which can simultaneously construct C–C bonds and C–X(X = S/Se) bonds using sulfoxonium ylides as starting materials to obtain sulfur-or selenium-containing compounds. This strategy is characterized by the safer and greener carbene precursor, high yields and broad substrate scope, possessing a wide range of application.

关键词： Sulfoxonium ylides Rhodium(Ⅱ)-catalyzed Carbene Rearrangement reactions One-pot process

Effect of cerium alloying on microstructure,texture and mechanical properties of magnesium during cold-rolling process

在线全文

学校读者我要写书评

暂无评论

Journal of Rare Earths 2024年第5期42卷 1001-1008,I0007页

作者： Zhen Zhang Huanhuan Chen Shiju Cao Jinhua Peng Peng Guo Chang Long Shan Wang Chang Chen yong wu Ji'an Huang Xiaodong Du Haigen Wei School of Materials Science and Engineering Hefei University of TechnologyHefei230009China NationalLocal Joint Research Center of Non-ferrous Metal Materials and Processing Technology Hefei230009China Laboratory of Nonferrous Metal Material and Processing Engineering of Anhui Province Hefei230009China School of Materials Science and Engineering Jiangsu University of Science and TechnologyZhenjiang212003China Institute of Industry and Equipment Technology Hefei University of TechnologyHefei230009China Faculty of Materials Metallurgy and Chemistry Jiangxi University of Science and TechnologyGanzhou341000China

Hot-extrusion and cold-rolling were conducted on Mg-Ce binary alloys to explore the effect of cerium(Ce)on microstructure,texture and mechanical properties of Mg *** addition of Ce results in significant grain refinement both in as-cast and hot-extruded *** basal texture is also weakened after extrusion and an inclined basal texture is formed with Ce *** strength and elongation of the Mg-Ce alloys are improved simultaneously due to such grain refinement and texture weakening *** cold-rolling,plenty of twins are found in the pure Mg and AZ31 plates while grains in the Mg-0.3Ce plate deform more uniformly without lamellar twin ***,Mg-0.3Ce alloys own strong and continuous strain hardening because Ce atoms and Mg-Ce precipitated phases serve as obstacles for dislocation slip.

关键词： Mg-Ce alloys Hot extrusion Cold-rolling Rare earths

Rh(Ⅱ)catalyzed efficient sigmatropic rearrangement reaction of pyridotriazoles and sulfides

在线全文

学校读者我要写书评

暂无评论

Green Synthesis and Catalysis

Green Synthesis and Catalysis 2024年第2期5卷 77-79页

作者： Yuting Chen Guanghui Lv Zhiyang Li Meiling Ye Tianle Huang Li Hai yong wu Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry and Sichuan Province Sichuan Engineering Laboratory for Plant-Sourced Drug and Sichuan Research Center for Drug Precision Industrial TechnologyWest China School of PharmacySichuan UniversityChengdu610041China Department of Pharmacy Taihe HospitalHubei University of MedicineShiyan442000China

The[2,3]-and[1,2]-sigmatropic rearrangement reactions between pyridotriazoles and sulfides catalyzed by rhodium(II)were *** utilization of pyridotriazoles as the carbene precursors in this kind of reaction efficiently... 详细信息

关键词： Pyridotriazole Sulfide -Sigmatropic rearrangement -Sigmatropic rearrangement Rhodium catalysis