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Expert System for Accelerator Single-Freedom Nonlinear Components

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Chinese journal of nuclear physics 1995年第1期17卷 89-94页

作者： Wang, Sheng Xie, Xi liu, chunliang Graduate School of Nuclear Industry Beijing China

An expert system by Arity Prolog is developed for accelerator single-freedomnonlinear *** automatically yields any order approximate analytical solu-tions for various accelerator single-freedom nonlinear *** an example,theeighth order approximate analytical solution is derived by this expert system for a gen-eral accelerator single-freedom nonlinear component,showing that the design of the ex-pert system is successful.

关键词： Accelerator single-freedom nonlinear component Expert system Any order approximate analytical solution

Organoid Technology and Clinical Applications in Digestive System Cancer

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Engineering 2022年第2期8卷 123-130页

作者： Xiaofang Zhao Youhai Jiang chunliang liu Minghui Hou Hongyang Wang Jing Fu Fudan University Shanghai Cancer Center Shanghai 200032China International Cooperation Laboratory on Signal Transduction&Key Laboratory of Signaling Regulation and Targeting Therapy of Liver Cancer Ministry of Education&Shanghai Key Laboratory of Hepatobiliary Tumor BiologyEastern Hepatobiliary Surgery HospitalSecond Military Medical UniversityShanghai 200438China Cancer Research Center The First Affiliated Hospital of USTCDepartment of Life Sciences and MedicineUniversity of Science and Technology of ChinaHefei 230031China Department of Oncology The First Affiliated Hospital of Zhengzhou UniversityZhengzhou 450052China

Cancers of the digestive system(DS),including esophageal,gastric,colorectal,liver,and pancreatic can-cers,have a high incidence and mortality *** cancer models cannot faithfully recapitu-late the critical features of the original tumor,resulting in the failure of translation from basic research into clinical *** advanced cancer models are in urgent need of pathogenesis exploration and anticancer medicine *** are in vitro cultured three dimensional(3D)self-organizing organotypic structures derived from tissues and pluripotent stem cells,which faithfully mimic the histological features and preserve the genetic heterogeneity of the original *** normal and malignant organoids can now be efficiently established from the DS tissues of *** this review,we summarize the general methods to generate human DS organoids and their applications as a novel model in basic cancer research,preclinical medical practice,and precision medicine.

关键词： Organoid Digestive system cancer Precision medicine

Analysis of microwave propagation in a time-varying plasma slab with particle-in-cell simulations

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Plasma Science and Technology 2019年第10期21卷 47-53页

作者： Kun CHEN Chao CHANG Yongdong LI Hongguang WANG chunliang liu Key Laboratory for Physical Electronics and Devices of the Ministry of Education Xi’an Jiaotong UniversityXi’an 710049People’s Republic of China School of Electronic Science and Engineering Xi’an Jiaotong UniversityXi’an 710049People’s Republic of China

Continuous microwave propagation through a time-varying plasma and frequency up-conversion has been demonstrated by particle-in-cell (PIC) simulation. In principle, it is possible to transform a 2.45 GHz source radiation to an arbitrary larger frequency radiation. The energy conversion is also obtained by the theoretical analysis and has been testified by PIC simulation. The source wave was propagating in a parallel plate waveguide locally filled with the ionized gas. In this paper we would discuss the effects of the rise time, the plasma length, the switching time and the collision frequency on the energy conversion, and the methods to improve the upshift wave energy are proposed. We also put forward the new concept of the critical values of the rise time and the source wave amplitude to provide a theoretical basis for the selection of parameters in the experiments.

关键词： continuous microwave time-varying plasma frequency up-conversion particle-incell (PIC) simulation

Process design and intensification of multicomponent azeotropes special distillation separation via molecular simulation and system optimization

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Chinese Journal of Chemical Engineering 2024年第7期71卷 24-44页

作者： chunliang liu Jianhui Zhong Ranran Wei Jiuxu Ruan Kaicong Wang Zhaoyou Zhu Yinglong Wang Limei Zhong College of Chemical Engineering Qingdao University of Science and TechnologyQingdao 266042China

This work provides an overview of distillation processes,including process design for different distillation processes,selection of entrainers for special distillation processes,system integration and intensification of distillation processes,optimization of process parameters for distillation processes and recent research progress in dynamic control ***,the feasibility of using thermodynamic topological theories such as residual curve,phase equilibrium line and distillation boundary line to analyze different separation regions is discussed,and the rationality of distillation process design is discussed by using its ***,the application of molecular simulation methods such as molecular dynamics simulation and quantum chemical calculation in the screening of entrainer is discussed for the extractive distillation *** thermal coupling mechanism of different distillation processes is used to explore the process of different process ***,a mixed integer nonlinear optimization strategy for the distillation process based on different algorithms is ***,the improvement of dynamic control strategies for different distillation processes in recent years is *** work focuses on the application of process intensification and system optimization in the design of distillation process,and analyzes the challenges,prospects,and development trends of distillation technology in the separation of multicomponent azeotropes.

关键词： Azeotrope separation Process design Optimization algorithm Process integration Dynamic control Entrainer selection

Microwave frequency downshift in the time-varying collision plasma

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Plasma Science and Technology 2020年第2期22卷 73-78页

作者： Kun CHEN Chao CHANG Yongdong LI Hongguang WANG chunliang liu Key Laboratory for Physical Electronics and Devices of the Ministry of Education Xi'an Jiaotong UniversityXi’an 710049People’s Republic of China School of Electronic Science and Engineering Xi’an Jiaotong UniversityXi’an 710049People’s Republic of China

Microwave frequency downshift in the time-varying collision plasma has been demonstrated by particle-in-cell *** simulation results are consistent with the theoretical analysis,and the preconditions for microwave frequency downshift are that the collision frequency needs to be greater than the incident wave frequency,and the plasma frequency is two times greater than the incident wave ***,the simulation results are compared with the reported experimental results indicating good agreement.

关键词： frequency downshift time-varying collision plasma particle-in-cell(PIC)simulation

Investigation on current loss of high-power vacuum transmission lines with coaxial-disk transitions by particle-in-cell simulations

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Plasma Science and Technology 2021年第11期23卷 177-184页

作者： Wei LUO Jianwei ZHANG Yongdong LI Hongguang WANG chunliang liu Pengfei ZHANG Fan GUO Department of Applied Physics Xi’an University of TechnologyXi’an 710048People's Republic of China Key Laboratory for Physical Electronics and Devices of the Ministry of Education School of Electronic Science and EngineeringXi'an Jiaotong UniversityXi’an 710049People's Republic of China State Key Laboratory of Intense Pulsed Radiation Simulation and Effect Northwest Institute of Nuclear TechnologyXi'an 710024People's Republic of China Institute of Fluid Physics China Academy of Engineering PhysicsMianyang 621900People's Republic of China

Coaxial-disk transitions can generate non-uniform magnetic fields and abrupt impedance variations in magnetically insulated transmission lines(MITLs),resulting in disturbed electron flow and non-negligible current *** this paper,3 D particle-in-cell simulations are conducted with UNPIC-3 d to investigate the current loss mechanism and the influence of the input parameters of the coaxial-disk transition on current loss in an MITL *** results reveal that the magnetic field non-uniformity causes major current loss in the MITL after the coaxialdisk transition,and the non-uniformity decreases with the distance away from the *** uniformity of the magnetic field is improved when increasing the number of feed lines of a linear transformer driver-based accelerator with coaxial-disk *** number of input feed lines should be no less than four in the azimuthal distribution to obtain acceptable uniformity of the magnetic *** make the ratio of the current loss to the total current of the accelerator less than 2%at peak anode current,the ratio of the current in each feed line to the total current should be no less than 8%.

关键词： magnetically insulated transmission line coaxial-disk transition current loss

Nonlinear topological valley Hall edge states arising from type-Ⅱ Dirac cones

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Advanced Photonics 2021年第5期3卷 44-51页

作者： Hua Zhong Shiqi Xia Yiqi Zhang Yongdong Li Daohong Song chunliang liu Zhigang Chen Xi’an Jiaotong University School of Electronic Science and EngineeringKey Laboratory for Physical Electronics and Devices of the Ministry of Education&Shaanxi Key Lab of Information Photonic TechniqueFaculty of Electronic and Information EngineeringXi’anChina Nankai University TEDA Applied Physics Institute and School of PhysicsMOE Key Laboratory of Weak-Light Nonlinear PhotonicsTianjinChina San Francisco State University Department of Physics and AstronomySan FranciscoCaliforniaUSA

A Dirac point is a linear band crossing point originally used to describe unusual transport properties of materials like *** recent years,there has been a surge of exploration of type-II Dirac/Weyl points using various engineered platforms including photonic crystals,waveguide arrays,metasurfaces,magnetized plasma and polariton micropillars,aiming toward relativistic quantum emulation and understanding of exotic topological *** endeavors,however,have focused mainly on linear topological states in real or synthetic Dirac/Weyl *** propose and demonstrate nonlinear valley Hall edge(VHE)states in laserwritten anisotropic photonic lattices hosting innately the type-Ⅱ Dirac *** self-trapped VHE states,manifested as topological gap quasi-solitons that can move along a domain wall unidirectionally without changing their profiles,are independent of external magnetic fields or complex longitudinal modulations,and thus are superior in comparison with previously reported topological edge *** finding may provide a route for understanding nonlinear phenomena in systems with type-Ⅱ Dirac points that violate the Lorentz invariance and may bring about possibilities for subsequent technological development in light field manipulation and photonic devices.

关键词： photonic topological insulator type-ⅡDirac cone valley Hall edge soliton

基于多孔Al_2O_3绝缘层的MIM电子源电子发射特性研究

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真空科学与技术学报 2015年第11期35卷 1390-1395页

作者：薛涛张小宁刘纯亮西安交通大学电子物理与器件教育部重点实验室西安710049

针对基于无孔Al_2O_3绝缘层的金属-绝缘层-金属(MIM)电子源存在显著负阻效应和无法在气氛下稳定发射电子的特点,提出并制备了一种Al底电极-多孔Al_2O_3绝缘层-Ti/Au复合顶电极结构的MIM电子源。在真空,不同压强的氮气和空气中的电子发... 详细信息

针对基于无孔Al_2O_3绝缘层的金属-绝缘层-金属(MIM)电子源存在显著负阻效应和无法在气氛下稳定发射电子的特点,提出并制备了一种Al底电极-多孔Al_2O_3绝缘层-Ti/Au复合顶电极结构的MIM电子源。在真空,不同压强的氮气和空气中的电子发射结果表明,Al_2O_3绝缘层经过磷酸扩孔后,MIM电子源的负阻效应在电子发射区间几乎消失,同时增强了电子发射的局部电场,电子获得更好的加速,提高了发射电流。Ti/Au复合顶电极改善了Au膜和多孔Al_2O_3绝缘层的电接触,减小了电子能量的散射。该电子源发射的电子能够激发氮气,在空气和氮气中的发射电流大小受气体及其压强的影响。

关键词：多孔Al2O3 MIM电子源电子发射特性负阻效应

融合Gabor小波能量与方向特征的掌纹识别算法

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仪器仪表学报 2008年第3期29卷 556-561页

作者：练秋生陈书贞刘春亮燕山大学信息科学与工程学院秦皇岛066004

提出了一种融合Gabor小波能量与方向两级特征的掌纹识别算法,有效地解决了纹线的方向特征难以描述的困难。首先对预处理后的掌纹进行不同方向不同尺度的Gabor小波多通道滤波,再对得到的各个方向子带进行模糊分块,计算每一小块区域的能量... 详细信息

提出了一种融合Gabor小波能量与方向两级特征的掌纹识别算法,有效地解决了纹线的方向特征难以描述的困难。首先对预处理后的掌纹进行不同方向不同尺度的Gabor小波多通道滤波,再对得到的各个方向子带进行模糊分块,计算每一小块区域的能量,在同一尺度不同方向上找出能量最大的区域,并标记此区域对应的Gabor方向。采用格雷码对方向特征编码,再分别计算能量特征的欧氏距离和方向特征的汉明距离,最后将2种距离按权相加进行掌纹识别。与利用单一能量或方向特征的算法相比,本文提出的算法具有较高的检索识别率。

关键词：掌纹识别 Gabor 能量特征方向特征模糊分块