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Spin Assignment of the First Discovered Superdeformed Band 152Dy(1) and Some Superdeformed Bands in Neighboring Nuclei

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Chinese Physics Letters 1999年第9期16卷 632-634页

作者： LIU Shu-xin xin Xiao-bin zeng Jin-yan Department of Physics Peking Universityj Beijing 100871

By using various approaches to the spin assignment, including the best-fit-method, the variation of moment of inertia with angular momentum, the bandhead moment of inertia J0 systematics, and the signature systematics, the spin of the lowest level observed in the first discovered superdeformed band 152Dy(1)is definitely predicted to be I0 = 26(Eγ(I0 + 2 → I0) = 602.4 keV), rather than the previously predicted I0 = 22,24, or 25. The spin prediction and properties of some superdeformed bands in the A ~ 150 region are discussed.

关键词： inertia momentum signature

Mobile Edge Communications, Computing, and Caching(MEC3) Technology in the Maritime Communication Network

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China Communications 2020年第5期17卷 223-234页

作者： Jie zeng Jiaying Sun Binwei Wu xin Su Chongqing University of Posts and Telecommunications Chongqing 400065China Tsinghua University 100084BeijingChina University of Electronic Science and Technology of China Chengdu 610054China

With the increasing maritime activities and the rapidly developing maritime economy, the fifth-generation(5G) mobile communication system is expected to be deployed at the ocean. New technologies need to be explored to meet the requirements of ultra-reliable and low latency communications(URLLC) in the maritime communication network(MCN). Mobile edge computing(MEC) can achieve high energy efficiency in MCN at the cost of suffering from high control plane latency and low reliability. In terms of this issue, the mobile edge communications, computing, and caching(MEC3) technology is proposed to sink mobile computing, network control, and storage to the edge of the network. New methods that enable resource-efficient configurations and reduce redundant data transmissions can enable the reliable implementation of computing-intension and latency-sensitive applications. The key technologies of MEC3 to enable URLLC are analyzed and optimized in MCN. The best response-based offloading algorithm(BROA) is adopted to optimize task offloading. The simulation results show that the task latency can be decreased by 26.5’ ms, and the energy consumption in terminal users can be reduced to 66.6%.

关键词： best response-based offloading algorithm(BROA) energy consumption mobile edge computing(MEC) mobile edge communications,computing,and caching(MEC3) task offloading

Rural Compulsory Education in Impoverished Areas in China:Institutional Barriers and Solutions

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华中师范大学学报：人文社会科学版 2014年第S3期 95-104页

作者： zeng xin Central China Normal University College of Education

The rural compulsory education has been regarded as one of the most important national mission to be accomplished during the 21st century in China,and difficulties were not relieved especially although various policies have been enacted and carried out *** paper analyzed the challenges and issues to be addressed in the current rural compulsory education in China,and found that the funding for rural compulsory education is still inadequate in the poverty-stricken areas,and this presents a major obstacle for developing more complete compulsory education with a higher quality in these *** author recommended that Chinese governments from central to local levels should invest more financially in rural compulsory education according to the local needs so as to build a stronger institutional capacity for the school system,and routine procedures and standards for budget and funds appropriation should be established effectively to support the compulsory education development of the impoverished areas.

关键词： rural compulsory education impoverished areas barriers and solutions

Enhanced Hardness of Transparent HAp Ceramic by Microstructure Refinement

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Journal of Wuhan University of Technology(Materials Science) 2019年第1期34卷 254-258页

作者： zeng Hui JIN xin XIONG Yan Wuhan Institute of Marine Electric Propulsion School of Materials Science & Engineering Hubei Province Key Laboratory of Green Materials for Light Industry Hubei University of Technology

Transparent hydroxyapatite(HAp) ceramics with the grain size ranging 86-1 300 nm were successfully synthesized by spark plasma sintering(SPS) at 925-1 200 ℃. All the sample achieved final density higher than 99.7%. The phase stability was identified by X-ray diffraction(XRD) and Fourier transform infrared spectroscopy(FTIR). The experimental results indicate that there is no decomposition or dehydroxylation during the SPS processes. The influences of microstructure refinement on the hardness were investigated using HallPetch(H-P) relationship, and the hardness of transparent HAp ceramic increases with the decrease of grain size. It is demonstrated that the grain boundaries and defects play important roles on the hardness.

关键词： hydroxyapatite transparent hardness grain size,microstructure refinement

A Novel Tensor Decomposition-Based Efficient Detector for Low-Altitude Aerial Objects With Knowledge Distillation Scheme

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IEEE/CAA Journal of Automatica Sinica 2024年第2期11卷 487-501页

作者： Nianyin zeng xinyu Li Peishu Wu Han Li xin Luo Department of Instrumental and Electrical Engineering Xiamen UniversityXiamen 361005China IEEE College of Computer and Information Science Southwest UniversityChongqing 400715China

Unmanned aerial vehicles(UAVs) have gained significant attention in practical applications, especially the low-altitude aerial(LAA) object detection imposes stringent requirements on recognition accuracy and computational resources. In this paper, the LAA images-oriented tensor decomposition and knowledge distillation-based network(TDKD-Net) is proposed,where the TT-format TD(tensor decomposition) and equalweighted response-based KD(knowledge distillation) methods are designed to minimize redundant parameters while ensuring comparable performance. Moreover, some robust network structures are developed, including the small object detection head and the dual-domain attention mechanism, which enable the model to leverage the learned knowledge from small-scale targets and selectively focus on salient features. Considering the imbalance of bounding box regression samples and the inaccuracy of regression geometric factors, the focal and efficient IoU(intersection of union) loss with optimal transport assignment(F-EIoU-OTA)mechanism is proposed to improve the detection accuracy. The proposed TDKD-Net is comprehensively evaluated through extensive experiments, and the results have demonstrated the effectiveness and superiority of the developed methods in comparison to other advanced detection algorithms, which also present high generalization and strong robustness. As a resource-efficient precise network, the complex detection of small and occluded LAA objects is also well addressed by TDKD-Net, which provides useful insights on handling imbalanced issues and realizing domain adaptation.

关键词： Attention mechanism knowledge distillation(KD) object detection tensor decomposition(TD) unmanned aerial vehicles(UAVs)

Engineering graphene oxide and hydrogel coatings on fabrics for smart Janus textiles with superior thermal regulation

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Chinese Journal of Chemical Engineering 2024年第10期74卷 1-12页

作者： Weidong Wu Yukun zeng Chen Zhou xin Zhou Shengyang Yang Department of Chemistry and Chemical Engineering Yangzhou UniversityYangzhou 225002China College of Veterinary Medicine Yangzhou UniversityYangzhou 225009China Department of Physical Sciences University of Central MissouriWarrensburgMO 64093USA

Fabric multifunctionality offers resource savings and enhanced human *** study innovatively integrates cooling,heating,and antimicrobial properties within a Janus fabric,surpassing previous research focused solely on cooling or *** effects are achieved by applying distinct coatings to each side of the *** graphene oxide(GO)coating exhibits exceptional light-to-heat conversion,absorbing and transforming light energy into heat,thereby elevating fabric temperature by 15.4℃,22.7℃,and 43.7℃ under 0.2,0.5,and 1 sun irradiation,***,a hydrogel coating on one side absorbs water,facilitating heat dissipation through evaporation upon light exposure,reducing fabric temperature by 5.9℃,8.4℃,and 7.1℃ in 0.2,0.5,and 1 sun irradiation,***,both sides of Janus fabric exhibit potent antimicrobial properties,ensuring fabric *** work presents a feasible solution to address crucial challenges in fabric thermal regulation,providing a smart approach for intelligent adjustment of body comfort in both summer and *** integrating heating and cooling capabilities along with antimicrobial properties,this study promotes sustainable development in textile techniques.

关键词： Janus fabric Heat transfer Membranes Gels Evaporation Bacterial resistance

Combined experimental and simulation study on corrosion behavior of B10 copper-nickel alloy welded joint under local turbulence

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Journal of Iron and Steel Research International 2023年第8期30卷 1598-1612页

作者： Da-lei Zhang Ran Liul Ying-shuang Liul Shao-hua xing Zong-hao He Yao Qian Jin-zeng Liu Xiao-hui Dou xin-wei Zhang School of Materials Science and Engineering China University of Petroleum(East China)Qingdao 266580ShandongChina State Key Laboratory for Marine Corrosion and Protection Luoyang Ship Material Research InstituteQingdao 266237ShandongChina

The corrosion behavior of B10 copper-nickel alloy welded joints in seawater pipeline system was analyzed under local turbulence induced by weld residual *** corrosion behavior was evaluated by array electrode technology,mor-phology and elemental characterization,and COMSOL Multiphysics *** results provide a theoretical basis for the corrosion and leakage of B10 alloy in seawater pipeline under the action of *** results show that residual height-induced turbulence exhibits a significant effect on the corrosion behavior in different areas of welded joints in B10 *** can damage some surfaces,causing polarity deflection followed by acceleration of corrosion,or it is easier to form a protective film to slow down *** Multiphysics results show that the shear rate and turbulent kinetic energy increase linearly with the increase in residual height and *** corrosion behavior of alloy surface is influenced by controlling the mass transfer rate and surface state.

关键词： Array electrode technology Welded joint Corrosion COMSOL Multiphysics simulation Seawater

MashReDroid: enabling end-user creation of Android mashups based on record and replay

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Science China(Information Sciences) 2020年第10期63卷 54-73页

作者： Jiahuan ZHENG Liwei SHEN xin PENG Hongchi zeng Wenyun ZHAO School of Computer Science Fudan University Shanghai Key Laboratory of Data Science Fudan University

To allow end users to combine different apps for accomplishing various goals, it is desired that they can create mashups of mobile apps in an on-demand fashion. The end user creation of mobile mashups,however, is complicated by the fact that many apps do not expose interfaces for mashup and the lack of user friendly interfaces for end user programming. In this paper, we propose MashReDroid, an end user programming approach for the creation of Android mashups that incorporates the behaviors of backend apps into the execution of a host app. MashReDroid automatically transforms Android apps into mashup enabled apps. It then allows end users to create mashups by recording the interactions between host apps and backend apps and run mashups by replaying the interactions. Our evaluation shows that MashReDroid supports a variety of real scenarios and users can easily create and use mashups with a very low overhead.

关键词： end user programming human computer interaction Android mashup app transformation

Design and analysis of a mode-hop-free tunable laser based on etched diffraction grating

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Journal of Zhejiang University-Science C(Computers and Electronics) 2010年第10期11卷 793-797页

作者： Rui-xing zeng Lei WANG Jian-jun HE Center for Integrated Optoelectronics State Key Lab of Modern Optical Instrumentation Zhejiang University Hangzhou 310027 China

A novel semiconductor laser which can achieve mode-hop-free tuning is proposed. The device consists of an etched diffraction grating （EDG） as a dispersive element to provide the mode selection function and an active waveguide to provide optical gain for the laser. The slab waveguide region of the EDG contains a tuning section covered by an electrode to inject a tuning current, and thus changes the refractive index. Mode-hop-free tuning is achieved by specially designing the shape of the tuning section, so that the tuning rate of the central wavelength reflected by the EDG and the tuning rate of the resonant wavelength of the laser cavity are equal. An optimized tuning section shape is designed to obtain the largest tuning range within a limited current range. Numerical simulation is presented to demonstTate the mode-hop-free tuning operation.

关键词： Semiconductor laser Integrated optics Etched diffraction grating