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Discovery of coesite in eclogite from Keqike Jianggalesayi: new evidence for ultrahigh-pressure metamorphism in South Altyn Tagh, northwestern China

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Science Bulletin 2017年第15期62卷 1048-1051页

作者： yongsheng gai Liang Liu chao Wang Wenqiang Yang Lei Kang Yuting Cao Xiaoying Liao State Key Laboratory of Continental Dynamics Department of Geology Northwest University College of Earth Science and Engineering Shandong University of Science and Technology

Coesite is a polymorph of Si O2formed at speci?c high-pressure conditions, and its presence in some crustal rocks as relicts marks the exhumation of deep subducted material to mantle depths, thus providing robust evid... 详细信息

关键词：超高压变质作用柯石英榴辉岩中国西北证据阿尔金地球动力学模型岩石圈板块 SiO2

Visual-simulation region proposal and generative adversarial network based ground military target recognition

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Defence Technology（防务技术） 2022年第11期18卷 2083-2096页

作者： Fan-jie Meng yong-qiang Li Fa-ming Shao gai-hong Yuan Ju-ying Dai Department of Space Test and Launch Noncommissioned Officer SchoolSpace Engineering UniversityBeijing102299China Department of Mechanical Engineering College of Field EngineeringArmy Engineering University of PLANanjing210007China

Ground military target recognition plays a crucial role in unmanned equipment and grasping the battlefield dynamics for military applications, but is disturbed by low-resolution and noisyrepresentation. In this paper, a recognition method, involving a novel visual attention mechanismbased Gabor region proposal sub-network(Gabor RPN) and improved refinement generative adversarial sub-network(GAN), is proposed. Novel central-peripheral rivalry 3D color Gabor filters are proposed to simulate retinal structures and taken as feature extraction convolutional kernels in low-level layer to improve the recognition accuracy and framework training efficiency in Gabor RPN. Improved refinement GAN is used to solve the problem of blurry target classification, involving a generator to directly generate large high-resolution images from small blurry ones and a discriminator to distinguish not only real images vs. fake images but also the class of targets. A special recognition dataset for ground military target, named Ground Military Target Dataset(GMTD), is constructed. Experiments performed on the GMTD dataset effectively demonstrate that our method can achieve better energy-saving and recognition results when low-resolution and noisy-representation targets are involved, thus ensuring this algorithm a good engineering application prospect.

关键词： Deep learning Biological vision Military application Region proposal network Gabor filter Generative adversarial network

A novel Tb^(3+) and Eu^(3+) co-doped dual-emitting phosphate K_(3)SrBi(P_(2)O_(7))_(2) phosphor for application in FIR thermometers

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Journal of Rare Earths 2024年第3期42卷 455-463,I0001页

作者： Baochen Wang Shifeng Sun Zeqi Li Zongwang Li Weiwei Lin chao Zeng Yan-gai Liu Ruiyu Mi School of Chemical and Environmental Engineering Anhui Polytechnic UniversityWuhu241000China State-Province Joint Engineering Laboratory of Zeolite Membrane Materials Key Lab of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of EducationInstitute of Advanced MaterialsCollege of Chemistry and Chemical EngineeringJiangxi Normal UniversityNanchang330022China Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes National Laboratory of Mineral MaterialsSchool of Materials Science and TechnologyChina University of GeosciencesBeijing100083China

Rare earth co-doped phosphor for fluorescence intensity ratio(FIR) thermometer has gained increasing attention in recent years. Herein, the novel Tb^(3+)and Eu^(3+)co-doped K_(3)SrBi(P_(2)O_(7))_(2)(KSBP) phosphate phosphors were reported. The crystal structure of the title phosphor was determined using Rietveld refinement and proved to have a three-dimensional structure. The time-resolved spectroscopy reveals that there is almost no energy transfer between Tb^(3+)and Eu^(3+). More importantly, Tb^(3+)and Eu^(3+)emissions show different thermal quenching behaviors, which claims the potential of this material for application in optical thermometer. The FIR of the typical KSBP:0.02Tb^(3+),0.04Eu^(3+)sample demonstrates a polynomial relationship as a function of temperature and the absolute and relative sensitivity are0.025 K^(-1) and 0.59%/K, respectively. In general, our study reports a novel and potential KSBP:Tb^(3+),Eu^(3+)phosphate phosphor that is promising for use in high-sensitive FIR thermometers.

关键词： Phosphor Thermometer Fluorescence intensity ratio Thermal stability Rare earths

In depth understanding of retinitis pigmentosa pathogenesis through optical coherence tomography angiography analysis:a narrative review

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International Journal of Ophthalmology(English edition) 2021年第12期14卷 1979-1985页

作者： Bing-Wen Lu Guo-Jun chao gai-Ping Wu Li-Ke Xie Department of Ophthalmology Ophthalmology Hospital of China Academy of Traditional Chinese MedicineBeijing 100040China

Retinitis pigmentosa(RP)is the most recognized inherited retinal disorder involving progressive photoreceptors degeneration which eventually causes ***,the pathogenesis of RP is still unclear,making it difficult to establish satisfying *** have been found to support the theory that vascular dysfunction is associated with the progression of *** coherence tomography angiography(OCTA)is a newly developed technology that enables visualization as well as quantitative assessment of retinal and choroidal vasculature *** in OCTA have opened a window for indepth understanding of RP ***,we propose a hypothesis of RP pathogenesis based on the current OCTA findings in RP,which includes four stages and two important key factors,vascular dysfunction and microglia ***,we discuss the future animal experiments needed and how advanced OCTA technology can help to further verity the *** final goal is to explore potential treatment options with enhanced understanding of RP pathogenesis.

关键词： retinitis pigmentosa optical coherence tomography angiography vascular dysfunction microglia activation

Dynamics of the Smooth Positons of the Wadati-Konno-Ichikawa Equation

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Communications in Theoretical Physics 2018年第3期69卷 227-232页

作者： gai-Hua Wang yong-Shuai Zhang Jing-Song He Department of Mathematics Ningbo UniversityNingbo 315211China School of Science Zhejiang University of Science and TechnologyHangzhou 310023China

We discuss a modified Wadati-Konno-Ichikawa(m WKI)equation,which is equivalent to the WKI equation by a hodograph *** explicit formula of degenerated solution of m WKI equation is provided by using degenerate Darboux transformation with respect to the eigenvalues,which yields two kinds of smooth solutions possessing the vanishing and nonvanishing boundary conditions *** particular,a method for the decomposition of modulus square is operated to the positon solution,and the approximate orbits before and after collision of positon solutions are displayed explicitly.

关键词： Wadati-Konno-Ichikawa equation positon breather-positon trajectory phase shift

A Fully Soft Bionic Grasping Device with the Properties of Segmental Bending Shape and Automatically Adjusting Grasping Range

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Journal of Bionic Engineering 2022年第5期19卷 1334-1348页

作者： Lingjie gai Xiaofeng Zong School of Automation China University of GeosciencesWuhan 430074China Hubei Key Laboratory of Advanced Control and Intelligent Automation for Complex Systems Wuhan 430074China Engineering Research Center of Intelligent Technology for Geo-Exploration Ministry of EducationWuhan 430074China

In this paper,we propose a fully Soft Bionic Grasping Device(SBGD),which has advantages in automatically adjusting the grasping range,variable stiffness,and controllable bending *** device consists of soft gripper structures and a soft bionic bracket *** adopt the local thin-walled design in the soft gripper *** design improves the grippers’bending efficiency,and imitate human finger’s segmental bending *** addition,this work also proposes a pneumatic soft bionic bracket structure,which not only can fix grippers,but also can automatically adjust the grasping space by imitating the human adjacent fingers’opening and closing *** to the above advantages,the SBGD can grasp larger or smaller objects than the regular grasping ***,to grasp small objects reliably,we further present a new Pinching Grasping(PG)*** great performance of the fully SBGD is verified by *** work will promote innovative development of the soft bionic grasping robots,and greatly meet the applications of dexterous grasping multi-size and multi-shape objects.

关键词： Fully soft bionic grasping device Local thin-walled grippers Soft bionic bracket Adjust grasping range automatically Segmental bending shape New pinching grasping method

A modular four-modal soft grasping device

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Science China(Technological Sciences) 2022年第8期65卷 1845-1858页

作者： gai LingJie ZONG XiaoFeng School of Automation China University of GeosciencesWuhan 430074China Hubei Key Laboratory of Advanced Control and Intelligent Automation for Complex Systems Wuhan 430074China Engineering Research Center of Intelligent Technology for Geo-Exploration Ministry of EducationWuhan 430074China

It is a key challenge for soft grasping devices to stably grasp unstructured objects with multi-size and multi-shape. The conventional single-function grippers have some limitations in grasping the above kinds of objects. This work proposes a modular four-modal soft grasping device(MFSGD), which consists of soft fingers, suction cups, soft wrapper, and other structures. It can perform a variety of grasping modes such as bending grasping mode, wrapping grasping mode, end liftingsucking mode, and side fixed-sucking mode. It may be one of the devices with the most grasping modes at present. Moreover, the device adopts a fully modular design with different structures connected by magnets. It is not only convenient to disassemble or assemble, so as to solve the mutual interference of different modal structures problem during grasping, but also simplifies the fabrication of the multi-modal grasping device. In addition, this work matches the suitable grasping modes for objects of different shapes and sizes, and obtains the relative characteristics of the MFSGD. The proposed device can improve the ability of the grasping robots, and is expected to play an important role in economic and industrial fields.

关键词： four-modal soft grasping device modular suction cups soft wrapper soft fingers

Tetracycline selective electrode based on molecularly imprinted polymer particles

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Chinese Chemical Letters 2010年第10期21卷 1235-1238页

作者： Zhi yong Guo Pan Pan gai Jing Duan Hui Na Zhang Sui Wang Faculty of Materials Science and Chemical Engineering The State Key Laboratory Base of Novel Functional Materials and Preparation Science Ningbo University Ningbo 315211 China

Tetracycline selective electrode using molecularly imprinted polymer particles as quasi-ionophore was constructed the first time, and its performance was carefully characterized. Due to the specific recognition of tetracycline by the particles, the selectivity coefficients for routine interferences were less than 10-4. Benefited from the absence of tetracycline in the sensitive membrane and the optimized composition of the inner filling solution, the limit of detection of the electrode was reduced to about 2.5 × 10^-8 mol/ L. It exhibited a good electrode slope 57.6 mV/decade near the theoretical Nernstian one, with a wide linear working range from 6.0 × 10^-8 to 1.0 × 10^-3 mol/L. The fabricated electrode should be used in pH 2--4, response time of which was less than 200 s when the concentration of tetracycline was higher than 1.0 × 10^-6 mol/L and no more than 30 min at the concentration of 1.0 × 10^-8 mol/L.

关键词： Ion selective electrode Molecular imprinting polymer Quasi-ionophore Tetracycline

Closed-loop dynamic control allocation for aircraft with multiple actuators

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Chinese Journal of Aeronautics 2013年第3期26卷 676-686页

作者： gai Wendong Wang Honglun Science and Technology on Aircraft Control Laboratory Beihang University

A closed-loop control allocation method is proposed for a class of aircraft with multiple actuators. Nonlinear dynamic inversion is used to design the baseline attitude controller and derive the desired moment increment. And a feedback loop for the moment increment produced by the deflections of actuators is added to the angular rate loop, then the error between the desired and actual moment increment is the input of the dynamic control allocation. Subsequently, the stability of the closed-loop dynamic control allocation system is analyzed in detail. Especially, the closedloop system stability is also analyzed in the presence of two types of actuator failures： loss of effectiveness and lock-in-place actuator failures, where a fault detection subsystem to identify the actuator failures is absent. Finally, the proposed method is applied to a canard rotor/wing （CRW） aircraft model in fixed-wing mode, which has multiple actuators for flight control. The nonlinear simulation demonstrates that this method can guarantee the stability and tracking performance whether the actuators are healthy or fail.

关键词： Canard rotor/wing aircraft Closed-loop control allocation Dynamic inversion Flight control systems Redundant actuators