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Depositional environment of shale in Wufeng and Longmaxi Formations, Sichuan Basin

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Petroleum Research 2017年第3期2卷 209-221页

作者： jianhua zhao Zhijun Jin Zhenkui Jin Xin Wen Yikai Geng Caina Yan Haikuan Nie College of Geosciences China University of PetroleumBeijing 102249China Petroleum Exploration and Production Research Institute SINOPECBeijing 10083China School of Energy Resources China University of GeosciencesBeijing 10083China

Formation of organic-rich shale was controlled by depositional processes and environment *** to petrology,mineralogy,fossil composition and sedimentary structure,seven lithofacies of shale were identified in the Wufeng Formation to Longmaxi Formation,e.g.,siliceous shale,silty shale,argillaceous shale,calcareous shale,shell-bearing argillaceous limestone/calcareous mudstone,siltstonefine sandstone and *** shale in the Wufeng and Longmaxi Formations,the depositional mode was not only the suspension deposition under the low-energy hydrodynamic condition,but also the biogenic deposition,the storm deposition and the bottom current deposition indicated by large amount of siliceous biological fossils,biological detritus with size graded structure,silt laminations,lenticular bedding,ripple cross-bedding and other sedimentary *** element analysis suggested that the siliceous shale in theWufeng Formation and the lower part of Longmaxi Formation was developed in the oxygen-dysoxic/anoxic depositional environment,which was rich in organic matters;then due to influence of the sea level gradually decline and bottom current,the silty and argillaceous shales were formed,and the oxygen-dysoxic/anoxic depositional environment was destroyed,gradually leading to the worse preservation condition of organic matter.

关键词： Organic-rich shale Lithofacies Depositional environment Redox condition Wufeng and Longmaxi Formations Sichuan Basin

Resonance analysis of single DOF parameter-varying system of magnetic-liquid double suspension bearing

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High Technology Letters 2022年第1期28卷 72-79页

作者： zhao jianhua zhao Yabin ZHANG Xuze WANG Jin WANG Ziqi GAO Dianrong DU Guojun Fluid Power Transmission and Control Laboratory Yanshan UniversityQinhuangdao 066004P.R.China No.7 Branch Company Qinhuangdao Port Co.LtdQinhuangdao 066002P.R.China College of Civil Engineering and Mechanics Yanshan UniversityQinhuangdao 066004P.R.China

Magnetic-liquid double suspension bearing(MLDSB)is mainly supported by electromagnetic suspension and supplemented by hydrostatic *** bearing capacity and stiffness can be greatly improved,and then it is suitable for the occasions of medium speed,heavy *** the bearing system is excited by periodic force,the flow q and current i regulated by the double-closed-loop control mechanism change *** the risk of parametric resonance in MLDSB is greatly aggravated by the change of the parameter system,which seriously affects its operation stabil-ity and ***,this paper intends to study the resonance characteristics of the parame-ter system of ***,Marshall-Duffing equation of the parametric system is established by taking the flow q and the current i as variables ***,by using the asymptotic method,the occurrence condition and variation rule of the principal,1/2 Harmonic and 1/3 Harmonic para-metric resonance are *** results show that only the 1/2 Harmonic resonance of the flow q parameter varying system occurs accompanied by the resonance condition of high *** principal,1/2 Harmonic and 1/3 Harmonic parametric resonance of the current i occur accompanied by the resonance condition of high *** the 1/2 Harmonic resonance of the current i oc-curs accompanied by the non-single value bifurcation and dynamic *** paper can pro-vide theoretical reference for the parameter design and stable operation of MLDSB.

关键词： magnetic-liquid double suspension bearing(MLDSB) resonance analysis flow parameter varying system current parameter varying system

A double quantum dot defined by top gates in a single crystalline InSb nanosheet

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Chinese Physics B 2021年第12期30卷 153-159页

作者： Yuanjie Chen Shaoyun Huang Jingwei Mu Dong Pan jianhua zhao Hong-Qi Xu Beijing Key Laboratory of Quantum Devices Key Laboratory for the Physics and Chemistry of Nanodevices and Department of ElectronicsPeking UniversityBeijing 100871China State Key Laboratory of Superlattices and Microstructures Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China Beijing Academy of Quantum Information Sciences Beijing 100193China

We report on the transport study of a double quantum dot(DQD)device made from a freestanding,single crystalline InSb *** freestanding nanosheet is grown by molecular beam epitaxy and the DQD is defined by the top gate *** the transport measurements,we demonstrate how a single quantum dot(QD)and a DQD can be defined in an InSb nanosheet by tuning voltages applied to the top *** also measure the charge stability diagrams of the DQD and show that the charge states and the inter-dot coupling between the two individual QDs in the DQD can be efficiently regulated by the top *** simulations for the potential profile and charge density distribution in the DQD have been performed and the results support the experimental findings and provide a better understanding of fabrication and transport characteristics of the DQD in the InSb *** achieved DQD in the two-dimensional InSb nanosheet possesses pronounced benefits in lateral scaling and can thus serve as a new building block for the developments of quantum computation and quantum simulation technologies.

关键词： two-dimensional materials InSb nanosheet quantum dot

Determinate mathematical model of couple bearing force of magnetic-liquid suspension guide-way with complicate constraint

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High Technology Letters 2018年第4期24卷 440-448页

作者： Weng Gangmin Tian Xuefei zhao jianhua Zhang Bin Wang Qiang Chen Tao Liu Jingcheng Gao Dianrong School of Economics and Management Yanshan UniversityQinhuangdao 066004P.R.China College of Humanities and Law Yanshan UniversityQinhuangdao 066004P.R.China Qinhuangdao Beidaihe Middle School Qinhuangdao 066004P.R.China Hebei Provincial Key Laboratory of Heavy Machinery Fluid Power Transmission and Control Yanshan UniversityQinhuangdao 066004P.R.China

Magnetic-liquid suspension guide-way system( MLSGS) is coupled supported by permanent magnetic suspension and hydrostatic bearing. The structure and bearing mechanism of MLSGS of heavy computer numerical control( CNC) machine tools are introduced and the mathematical expression of bearing force of bearing unit is derived and it can be broken apart into six parts which sustains directly the coordinate components of broad external load,where the air gap of permanent magnet and hydrostatic oil film can be simplified as elastic supports,the compatibility equations of deformations for oil films and air gap are presented,and then the bearing capacity calculation of the bearing unit is transformed into a determinate problem. Considering the guide-way as a rigid body,the mathematics expression between the bearing unit's bearing force and the oil film variation is linearized,and the oil pocket's bearing capacity which bears different components of the external load is calculated separately. The six components of the bearing unit are added up,and the final general mathematics expression is derived. The proposed research offers a general simple method for calculating the bearing capacity of MLSGS with complicate constraint,which can be mastered simply by engineering designer and can improve design efficiency and accuracy.

关键词： heavy computer numerical control(CNC)machine tool magnetic-liquid suspension guide-way system(MLSGS) bearing unit compatibility equations of deformation linear treatment

Blind Source Separation based on Collective Neurodynamic Optimization Approach 36

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Blind Source Separation based on Collective Neurodynamic Opt...

Spin injection in the multiple quantum-well LED structure with the Fe/AlO_x injector

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作者： Jianchao Fan Ye Wang jianhua zhao Xiang Wang Xinxin Wang Department of Ocean Remote Sensing National Marine Environmental Monitoring Center Beijing BOE Display Technology Co. Ltd.

ISBN: (纸本)9781538629185

In this paper, a collective neurodynamic optimization approach is proposed to blind source separation via tensor decomposition. Tensor decompositions have a lot of success in many fields, such as blind source separation, remote sensing image processing, text mining, linear regression, and feature extraction. However, decomposition process would cost much time and usually trap into the local minima. To solve this problem, a novel collective neurodynamic optimization（CNO） approach is presented by adopting a group of recurrent neural networks（RNN） in framework of particle swarm optimization（PSO）.Through iteratively improving the best position of each RNN, the global optimal solutions of tensor decomposition are *** source separation experiments confirm the validity and higher performance of the proposed algorithm in comparison to the state-of-the-art algorithms.

关键词： Blind source separation Particle swarm optimization Neurodynamic optimization Tensor decomposition

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Science China(Physics,Mechanics & Astronomy) 2010年第4期53卷 649-653页

作者： Hao Wu HouZhi Zheng Jian Liu GuiRong Li Ping Xu Hui Zhu Hao Zhang jianhua zhao Chinese Acad Sci Inst Semicond State Key Lab Superlattices & Microstruct Beijing 100083 Peoples R China

A spin-injection/-detection device has been fabricated based on the multiple quantum well light emitting diode (LED) structure. It is found that only a broad electroluminescence (EL) peak of a full width at half maximum of 8.6 nm appears at the wavelength of 801 nm in EL spectra with a circular luminescence polarization degree of 18%, despite PL spectra always show three well resolved peaks. The kinetic energy gained by injected electrons and holes in their drift along opposite directions broadens the EL peak, and makes three EL peaks converge together. The same process also destroys the injected spin polarization of electrons mainly dominated by the Bir-Aronov-Pikus spin relaxing mechanism.

关键词： spintronics spin injection light emitting diode multiple quantum well

Nonlinear optical microscopy for skin in vivo:Basics,development and applications

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Journal of Innovative Optical Health Sciences 2023年第1期16卷 95-113页

作者： jianhua zhao Yuan zhao Zhenguo Wu Yunxian Tian Haishan Zeng Integrative Oncology Department–Imaging Unit BC Cancer Research Institute VancouverBCCanada Department of Dermatology and Skin Science University of British Columbia and Vancouver Coastal Health Research Institute VancouverBCCanada

Multi-photon microscopy(MPM)and coherent anti-Stokes Raman scattering(CARS)are two advanced nonlinear optical imaging techniques,which provide complementary information and have great potential in combination for noninvasive in vrito biomedical *** paper provides a detailed discussion of the basics,development and applications of these technologies for in vrivo skin research,covering the following topics:The principle and advantage of MPM and CARS,instrumentation development for in vino applications,MPM and CARS of normal skin,application of MPM and CARS in skin cancer and disease diagnosis;application of MPM in skin disease intervention,ie.,imaging guided two-photon photothermolysis.

关键词： Nonlinear microscopy multiphoton microscopy coherent anti-Stokes Raman scattering microscopy skin skin cancer multiphoton therapy

Embedded high-quality ternary GaAs_(1−x)Sb_(x) quantum dots in GaAs nanowires by molecular-beam epitaxy

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Journal of Semiconductors 2024年第8期45卷 18-24页

作者： Xiyu Hou Lianjun Wen Fengyue He Ran Zhuo Lei Liu Hailong Wang Qing Zhong Dong Pan jianhua zhao State Key Laboratory of Superlattices and Microstructures Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China College of Materials Science and Opto-Electronic Technology University of Chinese Academy of SciencesBeijing 100049China

Semiconductor quantum dots are promising candidates for preparing high-performance single photon sources.A basic requirement for this application is realizing the controlled growth of high-quality semiconductor quantum ***,we report the growth of embedded GaAs_(1−x)Sb_(x) quantum dots in GaAs nanowires by molecular-beam *** is found that the size of the GaAs_(1−x)Sb_(x) quantum dot can be well-defined by the GaAs *** dispersive spectroscopy analyses show that the antimony content x can be up to 0.36 by tuning the growth *** GaAs_(1−x)Sb_(x) quantum dots exhibit a pure zinc-blende *** addition,we have developed a new technology to grow GaAs passivation layers on the sidewalls of the GaAs_(1−x)Sb_(x) quantum *** from the traditional growth process of the passivation layer,GaAs passivation layers can be grown simultaneously with the growth of the embedded GaAs_(1−x)Sb_(x) quantum *** spontaneous GaAs passivation layer shows a pure zinc-blende phase due to the strict epitaxial relationship between the quantum dot and the passivation *** successful fabrication of embedded high-quality GaAs_(1−x)Sb_(x) quantum dots lays the foundation for the realization of GaAs_(1−x)Sb_(x)-based single photon sources.

关键词： semiconductor quantum dot nanowire GaAs_(1−x)Sb_(x) molecular-beam epitaxy

Synthesis and optical properties of high-quality ultrathin homogeneous GaAs_(1-x)Sb_(x) nanowires

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Science China(Physics,Mechanics & Astronomy) 2024年第12期67卷 148-156页

作者： Ran Zhuo Lianjun Wen Jian Wang Xiuming Dou Lei Liu Xiyu Hou Dunyuan Liao Baoquan Sun Dong Pan jianhua zhao State Key Laboratory of Superlattices and Microstructures Institute of SemiconductorsChinese Academy of SciencesBeijing100083China College of Materials Science and Opto-Electronic Technology University of Chinese Academy of SciencesBeijing100049China

Ternary GaAs_(1-x)Sb_(x) nanowires with designable bandgaps and lattice constants show important potential applications in band structure engineering as well as optical and optoelectronic ***,large diameters,low aspect ratios and even spontaneous core-shell structures are always found in GaAs_(1-x)Sb_(x) nanowires,which are hindering their optical and optoelectronic ***,we report the controlled synthesis of ultrathin GaAs_(1-x)Sb_(x) nanowires on Si(111)substrates by molecular-beam *** is found that ultrathin GaAs_(1-x)Sb_(x) nanowires with a diameter less than 40 nm and an aspect ratio exceeding 35 can be obtained by precisely tuning the Ga flux and the growth *** growth of the ultrathin GaAs_(1-x)Sb_(x) nanowires with a large-composition-range(0≤x≤0.4)are also achieved by directly tuning the antimony *** structural studies confirm that these ultrathin nanowires exhibit high crystal-quality,and no spontaneous core-shell nanostructures are observed along the axial and radial directions of the *** far as we known,it is the first time that homogeneous GaAs_(1-x)Sb_(x) nanowires are grown by molecular-beam *** measurements prove that the ultrathin GaAs_(1-x)Sb_(x) nanowires have a narrower full width at half maximum of the photoluminescence peak compared with those results reported in the literatures,and their emission wavelengths can be tuned from 850 nm(GaAs)to 1271 nm(GaAs_(0.6)Sb_(0.4)).In addition,the optical properties of the ultrathin GaAs_(1-x)Sb_(x) nanowires can be further improved by using the Al_(0.5)Ga_(0.5)As shell as a passivation *** work lays a foundation for the development of high-performance GaAs_(1-x)Sb_(x) nanowire-based optical and optoelectronic devices.

关键词： GaAs_(1−x)Sb_(x) nanowire molecular-beam epitaxy optical property