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Distributed Field Rotator Composed of Isolated Components

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Chinese Physics Letters 2014年第4期31卷 50-53页

作者： LIU Guo-Chang LI Chao shao jin-jin FANG Guang-You Key Laboratory of Electromagnetic Radiation and Sensing Technology Chinese Academy of Sciences Beijing 100190

Transformation optics offers remarkable control over electromagnetic fields and has recently opened an exciting gateway to design ＇field rotator devices＇. We propose a distributed field rotator with open windows based on composite transformation optics, which consists of a central circular region and several isolated components. The number, position and size of the components can be controlled freely by the design purpose. Full-wave simulations are performed to demonstrate its function, which is equivalent to a classic field rotator. However, such a distributed rotator makes it much easier to access and make use of the rotated field in the central region, compared to the closed classic field rotator, especially in the case of 3D situations.

关键词： ELECTROMAGNETIC fields DIELECTRICS FREE-space optical technology JACOBIAN matrices ELECTROMAGNETISM

Trustworthy DNN partition for blockchain-enabled digital twin in wireless IIoT networks

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Science China(Information Sciences) 2024年第11期67卷 373-374页

作者： Xiumei DENG jun LI Long SHI Kang WEI Ming DING Yumeng shao Wen CHEN Shi jin Pillar of Information Systems Technology and Design Singapore University of Technology and Design National Mobile Communications Research Laboratory Southeast University School of Electronic and Optical Engineering Nanjing University of Science and Technology Department of Computing Hong Kong Polytechnic University Data61 CSIRO Department of Electronics Engineering Shanghai Jiao Tong University

The integration of artificial intelligence(AI) and digital twin(DT) technology has revolutionized the industrial Internet of Things(IIoT), enabling advanced automation and intelligent manufacturing [1]. Through sophisticated interactions between physical entities and their virtual counterparts,AI-driven DTs facilitate performance monitoring, analysis,simulation, and optimization of physical assets, enabling predictive maintenance and informed decision-making [2].

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Femtosecond enhancement cavity with kilowatt average power

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Chinese Physics B 2019年第4期28卷 211-215页

作者： jin Zhang Lin-Qiang Hua shao-Gang Yu Zhong Chen Xiao-jun Liu State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics Wuhan Institute of Physics and Mathematics Chinese Academy of Sciences University of Chinese Academy of Sciences

Femtosecond enhancement cavity(fsEC) has been proved to be a powerful tool in a diverse range of ***, we report the recent progresses in building an fsEC on kilowatt level average power, with the aim of realization of intracavity high harmonic generation(HHG) and extension of the wavelength of femtosecond optical frequency comb from infrared(IR) to extreme ultraviolet(XUV). Upon mode-matching optimization and cavity length locking, an intracavity average power of 6.08 kW is reached and the corresponding buildup is 225. After introducing noble gas of Xe into the focus region, clear sign of plasma has been observed. The generated HHG is also coupled out by a sapphire plate placed at Brewster's angle for the fundamental laser. Our work paves the way for the realization of an XUV comb.

关键词： femtosecond enhancement cavity extreme ultraviolet optical frequency comb high-order harmonic generation

Using vitamin C to improve both performance and stability of n-type organic semiconductors

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Science China Materials 2024年第11期67卷 3755-3756页

作者： Sizhe Liu Xingxin shao jun Liu Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China School of Applied Chemistry and Engineering University of Science and Technology of ChinaHefei 230026China

Organic semiconductors(OSCs)have the great advantages of flexibility,light weight,low-cost and large-area processing[1].After intensively studied for several decades,OSCs are now considered to be the most promising candidate materials for next-generation electronic circuits.N-type OSCs are the vital component for the basic electronic element,such as p-n junctions,light-emitting diodes and complementary circuits[2].

关键词： semiconductors stability complementary

鹰嘴豆分离蛋白对减盐辽宁庄河大骨鸡鸡肉丸凝胶品质的影响

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食品工业科技 2025年第1期46卷 138-143页

作者：颜瑞池金娜苏玉虹邵彩梅尚宏丽锦州医科大学食品与健康学院辽宁锦州121001 禾丰食品股份有限公司辽宁沈阳110000

探究添加不同比例(1%、2%、4%)鹰嘴豆分离蛋白(chickpea protein isolate,CPI)对减盐大骨鸡鸡肉丸凝胶品质的影响。测定不同处理组减盐大骨鸡鸡肉丸的质构特性、色泽、水分分布、流变特性和微观结构。结果表明:(1.4%NaCl、4%CPI)处理组... 详细信息

探究添加不同比例(1%、2%、4%)鹰嘴豆分离蛋白(chickpea protein isolate,CPI)对减盐大骨鸡鸡肉丸凝胶品质的影响。测定不同处理组减盐大骨鸡鸡肉丸的质构特性、色泽、水分分布、流变特性和微观结构。结果表明:(1.4%NaCl、4%CPI)处理组的减盐大骨鸡鸡肉丸的硬度、弹性、咀嚼性显著高于其他处理组(P<0.05)。低场核磁共振分析显示,CPI添加量为4%的减盐大骨鸡鸡肉丸具有最高的P21和最低的P22,证明该条件下的减盐大骨鸡鸡肉丸持水性最佳。流变学特性显示,(1.4%NaCl、4%CPI)处理组的减盐大骨鸡鸡肉丸的储能模量最大,弹性最佳。扫描电镜显示,(1.4%NaCl、4%CPI)处理组的减盐大骨鸡鸡肉丸凝胶与其他处理组相比,结构更紧实,连续性更好。综上所述,添加1.4%NaCl、4%CPI有利于提高CPI减盐大骨鸡鸡肉丸的凝胶品质。

关键词：大骨鸡鹰嘴豆分离蛋白鸡肉丸凝胶品质

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Towards automatic freeform optics design: coarse and fine search of the three-mirror solution space

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Light(Science & Applications) 2021年第4期10卷 660-670页

作者： Benqi Zhang Guofan jin jun Zhu State Key Laboratory of Precision Measurement Technology and Instruments Departm ent of Precision InstrumentTsinghua UniversityBeijing 100084China

Design of an optical system,whether classic or novel,in the past or the present,requires significant effort from the *** addition to design methods and theories,the designer’s skills and experience in optical system design are particularly important,which may require years of practice to *** diversity and variety of results are limited because of the difficulty,time,and labor costs *** this article,we propose an automatic design method for freeform optics that can achieve a diverse range of three-mirror *** optical specifications and the design constraints are the only inputs required,and a variety of results can be obtained *** output results have various structures and various optical power distributions with high imaging *** implementing the design method,designers can not only realize an overview of the solution space of the three-mirror freeform system,but can also focus on specific designs.

关键词： mirror optics system

Size effects on the mixed modes and defect modes for a nano-scale phononic crystal slab

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Applied Mathematics and Mechanics(English Edition) 2023年第1期44卷 21-34页

作者： jun jin Ningdong HU Hongping HU Department of Mechanics School of Aerospace EngineeringHuazhong University of Science and TechnologyWuhan 430074China Hubei Key Laboratory of Engineering Structural Analysis and Safety Assessment Huazhong University of Science and TechnologyWuhan 430074China

The size-dependent band structure of an Si phononic crystal(PnC)slab with an air hole is studied by utilizing the non-classic wave equations of the nonlocal strain gradient theory(NSGT).The three-dimensional(3D)non-classic wave equations for the anisotropic material are derived according to the differential form of the *** on the the general form of partial differential equation modules in COMSOL,a method is proposed to solve the non-classic wave *** bands of the in-plane modes and mixed modes are *** in-plane size effect and thickness effect on the band structure of the PnC slab are *** is found that the thickness effect only acts on the mixed *** relative width of the band gap is widened by the thickness *** effects of the geometric parameters on the thickness effect of the mixed modes are further studied,and a defect is introduced to the PnC supercell to reveal the influence of the size effects with stiffness-softening and stiffness-hardening on the defect *** study paves the way for studying and designing PnC slabs at nano-scale.

关键词： band structure phononic crystal(PnC) nonlocal strain gradient theory(NSGT) size effect

Numerical Investigation of the Load Distribution between the Main Blade and the Splitter Blade in a High-Loading Centrifugal Compressor

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Journal of Thermal Science 2022年第5期31卷 1682-1695页

作者： OU jun jin Donghai GUI Xingmin Aeroengine Simulation Research Center School of Energy and Power EngineeringBeihang UniversityBeijing100191China Jiangxi Research Institute of Beihang University Nanchang330096China

In the traditional design of the centrifugal compressor,the splitter blade and the main blade always keep the same ***,to enable high efficiency of the high-loading centrifugal compressor,the matching of design parameters of the splitter blade and the main blade needs to be *** this paper,the influence of the load distribution between the main blade and the splitter blade on the aerodynamic performance,the flow field,and the internal vortices of a high-loading centrifugal compressor were studied by means of CFD *** cases with different values of the variable CR which is defined as the load-ratio of splitter blade to main blade were set *** each case,the splitter blade and the main blade were shaped according to different laws of circulation distribution(_(r)V_(u))while the average circulation of the splitter blade and the main blade at any meridional position were consistent with that of the *** results showed that a proper reduction of the load-ratio of splitter blade to main blade is beneficial to suppress the leakage vortex of the splitter blade and reduce the scale of the wake in the channel near the suction-side of the splitter blade,which consequently improves the flow uniformity at the impeller outlet and enhances the aerodynamic performance of both the stage and the *** stage isentropic efficiency of the optimal case was found to be 0.7%higher than that of the prototype and the stage total pressure ratio was also *** optimal value of CR,which in this investigation is 94%,is supposed to be the result of the trade-off between the development of the wake and the leakage vortices in adjacent two *** optimization of the load distribution between the main blade and the splitter blade provides an opportunity to further improve the high-loading centrifugal compressor performance.

关键词： high-loading centrifugal compressor load distribution performance flow uniformity wake leakage vortex

Distributed Penalized Modal Regression for Massive Data

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Journal of Systems Science & Complexity 2023年第2期36卷 798-821页

作者： jin jun LIU Shuangzhe MA Tiefeng College of Mathematical Sciences Yangzhou UniversityYangzhou 225002China Faculty of Science and Technology University of CanberraACT 2601Australia School of Statistics Southwestern University of Finance and EconomicsChengdu 661130China

Nowadays,researchers are frequently confronted with challenges from massive data computing by a number of limitations of computer primary *** regression(MR)is a good alternative of the mean regression and likelihood based methods,because of its robustness and high *** this end,the authors extend MR to massive data analysis and propose a computationally and statistically efficient divide and conquer MR method(DC-MR).The major novelty of this method consists of splitting one entire dataset into several blocks,implementing the MR method on data in each block,and deriving final results through combining these regression results via a weighted average,which provides approximate estimates of regression results on the entire *** proposed method significantly reduces the required amount of primary memory,and the resulting estimator is theoretically as efficient as the traditional MR on the entire data *** authors also investigate a multiple hypothesis testing variable selection approach to select significant parametric components and prove the approach possessing the oracle *** addition,the authors propose a practical modified modal expectation-maximization(MEM)algorithm for the proposed *** studies on simulated and real datasets are conducted to assess and showcase the practical and effective performance of our proposed methods.

关键词： Asymptotic distribution divide and conquer massive data modal regression multiple hypothesis testing