检索结果-南通市图书馆

Digital Communications and Networks 2024年第3期10卷 620-630页

作者： Guanlin Wu Haipeng Wang Yu Liu You He Shenzhen international graduate school Tsinghua UniversityShenzhen518071China Institute of Space Science and Applied Technology Harbin Institute of TechnologyShenzhen518055China Department of Electronic Engineering Tsinghua UniversityBeijing100084China

With the rapid growth of the maritime Internet of Things(IoT)devices for Maritime Monitor Services(MMS),maritime traffic controllers could not handle a massive amount of data in *** unmanned MMS,one of the key technologies is situation ***,the presence of slow-fast high maneuvering targets and track breakages due to radar blind zones make modeling the dynamics of marine multi-agents difficult,and pose significant challenges to maritime situation *** order to comprehend the situation accurately and thus offer unmanned MMS,it is crucial to model the complex dynamics of multi-agents using IoT big ***,previous methods typically rely on complex assumptions,are plagued by unstructured data,and disregard the interactions between multiple agents and the spatial-temporal correlations.A deep learning model,Graph Spatial-Temporal Generative Adversarial Network(GraphSTGAN),is proposed in this paper,which uses graph neural network to model unstructured data and uses STGAN to learn the spatial-temporal dependencies and *** experiments show the effectiveness and robustness of the proposed method.

关键词： Internet of things Multi-agents Graph neural network Maritime monitoring services

深度学习分子动力学模拟助力无铅（K,Na）NbO3铁电材料相变及纳米畴结构研究（英文）

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China Materials 2024年第9期67卷 3029-3038页

作者：张旭李蓓邹冀刘韩星徐贲刘凯 school of Materials Science and Engineering Research Center for Materials Genome EngineeringWuhan University of Technology State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology international school of Materials Science and Engineering Wuhan University of Technology graduate school China Academy of Engineering Physics

通过多态结构和畴动力学调控,无铅KxNa1-xNbO3（KNN）可拥有优异的铁电和压电性能,并因此获得持续关注.尽管通过组分、相和畴结构等测量可以优化KNN的铁电性能,然而,该体系铁电性能的原子尺度机理仍是一个亟待解决的问题.本文通过训练... 详细信息

通过多态结构和畴动力学调控,无铅KxNa1-xNbO3（KNN）可拥有优异的铁电和压电性能,并因此获得持续关注.尽管通过组分、相和畴结构等测量可以优化KNN的铁电性能,然而,该体系铁电性能的原子尺度机理仍是一个亟待解决的问题.本文通过训练具有从头算精度的深度学习势（DP）,对不同K/Na比例（x=0.25～1.0）的KNN展开了分子动力学模拟研究.DP模型在描述不同相结构下的KNbO3和K0.5Na0.5NbO3的状态方程、弹性常数和声子色散关系等特性上表现出极高的准确性,证实了DP模型的适用性和可扩展性.分子动力学模拟的结果表明,KNN （x=0.25～1.0）的顺电-铁电相变主要受到有序-无序效应的驱动;而位移效应在随后的铁电相变中占主导地位.特别地,随着Na含量的增加,K/Na离子半径差异会引起明显的氧八面体畸变,导致90°畴壁形成更加困难.可以预见的是,基于DP的原子模拟有助于为储能和换能材料的复杂结构、热力学和铁电特性的探索提供一个准确和高效的计算模拟解决方案.

关键词： KNN molecular dynamics deep potential phase transitions domain dynamics

The mediatory role of water quality on the association between extreme precipitation events and infectious diarrhea in the Yangtze River Basin,China

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Fundamental Research 2024年第3期4卷 495-504页

作者： Junfeng Yu Liang Zhao Xin-Zhong Liang Hung Chak Ho Masahiro Hashizume Cunrui Huang school of Public Health Sun Yat-sen UniversityGuangzhou 510080China The State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid dynamics(LASG) Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China Department of Atmospheric and Oceanic Science University of MarylandCollege ParkMD 20740USA Department of Public and international Affairs City University of Hong KongHong Kong 999077China Department of Global Health Policy Graduate School of MedicineThe University of TokyoTokyo 113-0033Japan Vanke school of Public Health Tsinghua UniversityBeijing 100084China Institute of Healthy China Tsinghua UniversityBeijing 100084China

Extreme precipitation is exacerbating the burden of infectious diarrhea in the context of climate change,it is necessary to identify the critical and easy-to-intervene intermediate factors for public health *** quality may be the most important mediator,while relevant empirical evidence is *** study aimed to examine the role of water quality in the process of infectious diarrhea caused by extreme *** infectious diarrhea cases,meteorological factors and water quality data in Yangtze River Basin in China between October 29,2007 to February 19,2017 were ***-stage statistical models were used to estimate city-specific extreme precipitation,water quality and infectious diarrhea relationships that were pooled to derive regional estimates.A causal mediation analysis was used to assess the mediation effect of water *** Yangtze River Basin,extreme precipitation events had a significant impact on infectious diarrhea(Incidence Rate Ratios[IRR]:1.027,95%Confidence Interval[CI]:1.013~1.041).After extreme precipitation events,the dissolved oxygen(DO)in surface water decreased(-0.123 mg/L,95%CI:-0.159 mg/L~-0.086 mg/L),while the un-ionized ammonia(NH(3)-N)increased(0.004 mg/L,95%CI:0.001 mg/L~0.006 mg/L).The combined overall effect of DO and NH(3)-N on infectious diarrhea showed that both low and high concentrations were associated with an increased risk of infectious *** causal mediation analysis showed that the mediation proportion of the two water quality indexes(DO and NH(3)-N)is 70.54%(P<0.001).To reduce the health effects of extreme precipitation,in contrast to current population-oriented health strategies,those that take into account more direct and easy-to-intervene water quality indicators should be encouraged by future policies.

关键词： Extreme precipitation Infectious diarrhea Water quality Dissolved oxygen Un-ionized ammonia Mediation analysis

Taguchi Analysis for Improving Optimization of Integrated Forward/Reverse logistics

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of the Operations Research Society of China 2023年第3期11卷 529-552页

作者： Elham Behmanesh Jürgen Pannek international graduate school for dynamics in logistics University of BremenBremenGermany Faculty of Production Engineering University of BremenBremenGermany BIBA Bremer Institut für Produktion und Logistik GmbH BremenGermany

The distribution–allocation problem is known as one of the most comprehensive strategic *** real-world cases,it is impossible to solve a distribution–allocation problem completely in acceptable *** forces the researchers to develop efficient heuristic techniques for the large-term operation of the whole supply *** techniques provide near optimal solution and are comparably fast particularly for large-scale test *** paper presents an integrated supply chain model which is flexible in the delivery *** solution methodology,we apply a memetic algorithm with a novelty in population *** identify the optimum operating condition of the proposed memetic algorithm,Taguchi method is *** this study,four factors,namely population size,crossover rate,local search iteration and number of iteration,are *** the best level of the considered parameters is the outlook of this research.

关键词： Integrated logistics network Flexible path Memetic algorithm Taguchi analysis

Numerical simulation of formaldehyde distribution characteristics in the high-speed train cabin

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Building Simulation 2024年第2期17卷 285-300页

作者： Fan Wu Hang Dong Chao Yu Hengkui Li Qingmin Cui Renze Xu Key Laboratory of Traffic Safety on Track Ministry of EducationSchool of Traffic&Transportation EngineeringCentral South UniversityChangshaHunan410075China Joint international Research Laboratory of Key Technologies for Rail Traffic Safety ChangshaHunan410075China National&Local Joint Engineering Research Center of Safety Technology for Rail Vehicle ChangshaHunan410075China school of Software Henan University of EngineeringZhengzhouHenan451191China

The global concern over indoor air pollution in public vehicles has grown *** a focus on enhancing passengers’comfort and health,this study endeavors to investigate the distribution characteristics of formaldehyde within a high-speed train cabin by employing a computational fluid dynamics(CFD)model which is experimentally validated in a real cabin *** research focuses on analyzing the impact of air supply modes,temperature,relative humidity,and fresh air change rate on the distribution and concentration of *** results demonstrate that the difference in average formaldehyde concentration between the two air supply modes is below 1.3%,but the top air supply mode leads to a higher accumulation of formaldehyde near the sidewalls,while the bottom air supply mode promotes a more uniform distribution of ***,the temperature,relative humidity,and fresh air change rate are the primary factors affecting formaldehyde concentration levels,but they have modest effects on formaldehyde’s distribution pattern within the *** the temperature and relative humidity increase,the changes in formaldehyde concentrations in response to variations in these factors become more ***,the formaldehyde concentration may surpass the standard limit of 0.10 mg/m^(3)if the fresh air change rate falls below 212 m^(3)/*** research provides a systematic approach and referenceable results for exploring formaldehyde pollution in high-speed train cabins.

关键词： indoor air pollution formaldehyde CFD simulation high-speed train ventilation

dynamics and cytokinic regulation of immune cell infiltration in genetically engineered mouse models of pancreatic cancer dictate the sensitivity to immunotherapy

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Cancer Communications 2024年第1期44卷 178-182页

作者： Okan Safak Shenghan Wang Carmen Mota Reyes Ibrahim Halil Gürcinar Sergey Tokalov Nedim Can Cevik Kivanc Görgülü Bengi Su Yilmaz Emre Erdogan Linhan Ye Qiaolin Li Elif Arik Sever SamedÖzer Güldal Süyen Helmut Friess Güralp Onur Ceyhan Rouzanna Istvanffy Hana Algül Ihsan Ekin Demir Department of Surgery Klinikum rechts der IsarTechnical University of MunichSchool of MedicineMunichBavariaGermany Department of General Surgery HPB-UnitSchool of MedicineAcibadem Mehmet Ali Aydinlar UniversityIstanbulIstanbulTurkey Comprehensive Cancer Center München Klinikum rechts der IsarTechnical University of MunichSchool of MedicineMunichBavariaGermany Department of Hematology Oncology and Tumor ImmunologyCharitéUniversity Medicine BerlinCampus Virchow ClinicBerlinBerlinGermany graduate school of Health Sciences Acibadem Mehmet Ali Aydinlar UniversityIstanbulIstanbulTurkey Department of Physiology Acibadem Mehmet Ali Aydinlar UniversityIstanbulIstanbulTurkey Else Kröner Clinician Scientist Professorship for Translational Pancreatic Surgery MunichGermany Neural Influences in Cancer(NIC)international Research Consortium MunichGermany

Dear Editor,Targeting the immune compartment in pancreatic duc-tal adenocarcinoma(PDAC)holds promise for prognostic improvement,yet our knowledge on the spatial and tem-poral dynamics and the molecular modulators of t... 详细信息

关键词： immune adenocarcinoma immunotherapy

Silent microscopy to explore a brain that hears butterflies'wings

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Light(Science & Applications) 2022年第6期11卷 1026-1028页

作者： Shin-Ichiro Terada Masanori Matsuzaki Department of Physiology Graduate School of MedicineThe University of TokyoTokyoJapan Brain Functional dynamics Collaboration Laboratory RIKEN Center for Brain ScienceSaitamaJapan international Research Center for Neurointelligence(WPI-IRCN) The University of Tokyo Institutes for Advanced StudyTokyoJapan

A silent two-photon laser-scanning microscopy system,which eliminates mechanical vibrations in the audible range,has enabled the detection of auditory cortical neurons with responses at sound pressure levels as low as... 详细信息

关键词： eliminate system sound

Artificial Intelligence-Enabled Mode-Locked Fiber Laser:A Review

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nanomanufacturing and Metrology 2023年第4期6卷 95-108页

作者： Qiuying Ma Haoyang Yu Shenzhen international graduate school Tsinghua UniversityShenzhen 518055China school of Automation Central South UniversityChangsha 410083China

Owing to their compactness,robustness,low cost,high stability,and difraction-limited beam quality,mode-locked fber lasers play an indispensable role in micro/nanomanufacturing,precision metrology,laser spectroscopy,LiDAR,biomedi-cal imaging,optical communication,and soliton ***-locked fber lasers are a highly complex nonlinear optical system,and understanding the underlying physical mechanisms or the fexible manipulation of ultrafast laser output is *** traditional research paradigm often relies on known physical models,sophisticated numerical calculations,and exploratory experimental ***,when dealing with several complex issues,these traditional approaches often face limitations and struggles in fnding efective *** an emerging data-driven analysis and processing technology,artifcial intelligence(AI)has brought new insights into the development of mode-locked fber *** review highlights the areas where AI exhibits potential in accelerating the development of mode-locked fber lasers,including nonlinear dynamics prediction,ultrashort pulse characterization,inverse design,and automatic control of mode-locked fber ***,the challenges and potential future development are discussed.

关键词： Artifcial intelligence Mode-locked fber lasers Ultrafast optics Intelligent optimization Machine learning Deep learning

Squat motion of a bipedal robot using real-time kinematic prediction and whole-body control

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

IET Cyber-Systems and Robotics 2022年第4期4卷 298-312页

作者： Wenhan Cai Qingkai Li Songrui Huang Hongjin Zhu Yong Yang Mingguo Zhao Department of Automation Tsinghua UniversityBeijingChina Shenzhen international graduate school Tsinghua UniversityShenzhenChina

Squatting is a basic movement of bipedal robots,which is essential in robotic actions like jumping or picking up *** to the intrinsic complex dynamics of bipedal robots,perfect squatting motion requires high-performance motion planning and control *** standard academic solution combines model predictive control(MPC)with whole-body control(WBC),which is usually computationally expensive and difficult to implement on practical robots with limited computing *** real-time kinematic prediction(RKP)method is proposed,which considers upcoming reference motion trajectories and combines it with quadratic programming(QP)-based *** the WBC handles the full robot dynamics and various constraints,the RKP only needs to adopt the linear kinematics in the robot's task space and to softly constrain the desired ***,the computational cost of derived closed-form RKP is greatly *** RKP method is verified in simulation on a heavy-loaded bipedal *** robot makes rapid and large-amplitude squatting motions,which require close-to-limit torque *** with the conventional QP-based WBC method,the proposed method exhibits high adaptability to rough planning,which implies much less user interference in the robot's motion ***,like the MPC,the proposed method can prepare for upcoming motions in advance but requires much less computation time.

关键词： bipedal robot real-time kinematic prediction squatting whole-body control

Co_(3)O_(4)/Mn_(3)O_(4) hybrid catalysts with heterointerfaces as bifunctional catalysts for Zn-air batteries

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2022年第5期31卷 679-687页

作者： Qikai Huang Xiongwei Zhong Qi Zhang Xin Wu Miaolun Jiao Biao Chen Jinzhi Sheng Guangmin Zhou Shenzhen Geim Graphene Center Tsinghua-Berkeley Shenzhen Institute&Tsinghua Shenzhen International Graduate SchoolTsinghua UniversityShenzhen 518055GuangdongChina

Zinc-air batteries(ZABs) with high energy density and safety are promising as next-generation energy storage systems, while their applications are severely hindered by the sluggish reaction kinetic of air cathodes. Developing a bifunctional catalyst with high activity and durability is an effective strategy to address the above challenges. Herein, a Co_(3)O_(4)/Mn_(3)O_(4) nanohybrid with heterointerfaces is designed as advanced cathode catalyst for ZABs. Density functional theory calculations show the heterogeneous interface between Co_(3)O_(4)/Mn_(3)O_(4) can improve the dynamics of carrier transport and thus enhancing the catalytic activity and durability. The Co_(3)O_(4)/Mn_(3)O_(4) catalyst anchored on reduced graphene oxide(rGO)exhibits high oxygen reduction reaction(ORR) activity with a half-wave potential of 0.86 V, and excellent oxygen evolution reaction(OER) activity with the potential of 1.59 V at 10 mA cm^(-2) , which are comparable to the commercial noble metal catalysts. The improved ORR/OER catalytic activity is ascribed to the synergistic effect of heterointerfaces between Co_(3)O_(4) and Mn_(3)O_(4)as well as the improved conductivity and contact area of oxygen/catalysts/electrolytes three-phase interface by r GO. Furthermore, a home-made ZAB based on Co_(3)O_(4)/Mn_(3)O_(4)/r GO shows a high open circuit voltage of 1.54 V, a large power density of 194.6 mW cm^(-2) and good long-term cycling stability of nearly 400 h at 5 mA cm^(-2) , which affords a promising bifunctional oxygen catalyst for rechargeable ZABs.

关键词： Transition metal oxide Carbon-based catalyst Heterointerfaces Bifunctional catalyst Zn-air batteries