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Preliminary Design of a System for Picking up Audio-Signals From Bubble Detectors GAO Si-ze1,NI Bang-fa,ZHANG Gui-ying,XIAO Cai-jin,LIU Cun-xiong, CHEN Zhe1,NIE Peng,LIU Chao1,zhao chang-jun (*** of Physics Science and Engineering Technology,Guang

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Preliminary Design of a System for Picking up Audio-Signals ...

On the L_p-Dual Mixed Volumes

作者： GAO Si-ze NI Bang-fa ZHANG Gui-ying XIAO Cai-jin LIU Cun-xiong CHEN Zhe NIE Peng LIU Chao zhao chang-jun College of Physics Science and Engineering Technology Guangxi University

This system is designed to pick up sound signals from large volume,low-threshold energy, low-background superheated droplets bubble detectors.A sound-sensitive bubble detector is composed of a container filled with a mixture of superheated droplets and gel,a temperature and pressure control system,and an audio acquisition system attached on the outer surface of the *** superheated droplets are in a metastable and superheated state at ambient temperature and *** the outside

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Acta Mathematica Sinica,English Series 2013年第9期29卷 1647-1654页

作者： Lian Ying CHEN chang Jian zhao Department of Mathematics China Jiliang University

We establish the cyclic inequality for i-th L p-dual mixed volume and Lp-dual Urysohn inequality between p-mean width and Lp-dual quermassintegral. Moreover, the dual isoperimetric inequality for Lp-dual mixed volume ... 详细信息

关键词： Dual mixed volume Lp-dual mixed volume mean width Lp-mean width dual isoperi-metric inequality Lp-dual quermassintegral

Improved astrometry of space debris with image restoration

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Research in Astronomy and Astrophysics 2014年第8期14卷 992-1000页

作者： Rong-Yu Sun chang-Yin zhao Key Laboratory of Space Object and Debris Observation Chinese Academy of Sciences Purple Mountain Observatory Chinese Academy of Sciences

In order to implement an observing strategy, image degradation that occurs during optical observation of space debris is ineluctable and has distinct characteris- tics. Image restoration is presented as a way to remove the influence of degradation in CCD images of space debris, based on assumed PSF models with the same F-WHM as images of the object. In the process of image restoration, the maximum entropy method is adopted. The results of reduction using observed raw CCD images indi- cate that the precision in estimating positions of objects is improved and the effects of degradation are reduced. Improving the astrometry of space debris using image restoration is effective and feasible.

关键词： techniques image processing -- space vehicles -- astrometry -- methods data analysis

A new source extraction algorithm for optical space debris observation

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Research in Astronomy and Astrophysics 2013年第5期13卷 604-614页

作者： Rong-Yu Sun chang-Yin zhao Purple Mountain Observatory Chinese Academy of Sciences Key Laboratory of Space Object and Debris Observation Chinese Academy of Sciences Graduate University of Chinese Academy of Sciences

Specific challenges arise in the task of real-time automatic data reduction of optical space debris observations. Here we present an automatic technique that optimally detects and measures the sources from images of optical space debris ob- servations. We show that highly reliable and accurate results can be obtained on most images produced by our specific sensors, and due to optimizations, the whole pipeline works fast and efficiently. Tests demonstrate that the technique performs better than SExtractor from the point of view of fast and accurate detection, therefore it is well suited for data reduction of optical space debris observations.

关键词： techniques: image processing -- space vehicles -- astrometry

Correlation between intrinsic dipole moment and pyroelectric coefficient of Fe-Mg tourmaline

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International Journal of Minerals,Metallurgy and Materials 2014年第2期21卷 105-112页

作者： chang-chun zhao Li-bing Liao Jie Xing School of Science China University of Geosciences School of Materials Science and Technology China University of Geosciences

Single-crystal X-ray diffraction structural data of four Fe-Mg tourmalines with different Fe contents from Xinjiang, Sichuan, and Yunnan Provinces, China, were collected at room temperature and-100oC. The intrinsic dipole moments of polyhedra and the total intrinsic dipole moment of the unit cell were calculated. By comparing the intrinsic electric dipole moments of the X, Y, Z, T, and B site polyhedra, it is found that the T site polyhedron makes the greatest contribution to the total intrinsic dipole moment. The pyroelectric coefficients of four Fe-Mg tourmalines were experimentally determined, and the influence of intrinsic dipole moments on their pyroelectric properties was inves-tigated. The experimental results show that, compared with the case at room temperature, the intrinsic dipole moments change with the total Fe content at-100oC in a completely different way. With the decrease of temperature, the total intrinsic dipole moments of tourmaline de-crease. Over the same temperature interval, the pyroelectric coefficients increase with the increase in intrinsic dipole moment.

关键词： tourmaline pyroelectricity dipole moment polyhedra

Advanced electrosynthesis of hydrogen peroxide on oxidized carbon electrocatalyst

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Journal of Energy Chemistry 2019年第7期28卷 10-11页

作者： chang-Xin zhao Bo-Quan Li Qiang Zhang Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology Department of Chemical Engineering Tsinghua University

Hydrogen peroxide(H2O2)is one of the 100 most important chemicals involved in multiple chemical processes including paper and textile manufacturing,waste degradation,and pharmaceutical production[1].Compared with the current industrial process to produce H2O2 following the anthraquinone oxidation/reduction method,electrochemical reduction of oxygen to H2O2 through a two-electron pathway constitutes an environmental friendly alternative route[2-4].Unfortunately,the electrogeneration of H2O2 from two-electron reduction of oxygen feedstock is kinetically sluggish and therefore requires electrocatalysts with high reactivity,high selectivity,and good stability[5,6].

关键词： Hydrogen peroxide electrosynthesis Oxygen reduction reaction Carbon nanotubes Electrocatalysis Oxygen functional groups

Synthesis of urea acetates as potential PPARα/γ dual agonists

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Chinese Chemical Letters 2008年第2期19卷 166-168页

作者： chang Yan zhao chang Qing Shi Yuan Wei Chen Key Laboratory of Asymmetric Synthesis ＆ Chirotechnology of Sichuan Province and Union Laboratory of Asymmetric Synthesis Chengdu Institute of Organic Chemistry Chinese Academy of Sciences Chengdu 610041 China Graduate School of Chinese Academy of Sciences Beijing 100049 China

In the quest for novel PPARα/γ dual agonists as putative drugs for the treatment of type 2 diabetes and dyslipidemia, we designed and synthesized a series of urea acetates as potential PPARα/γ dual agonists. The s... 详细信息

关键词： Oxazolc PPAR agonist Type 2 diabetes Urea Ammonolysis Synthesis

On the Linear Complexity of a Class of Periodic Sequences Derived from Euler Quotients

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Chinese Journal of Electronics 2023年第2期32卷 262-272页

作者： LUO Bingyu ZHANG Jingwei zhao chang'an School of Mathematics Sun Yat-sen University School of Information Science Guangdong University of Finance and Economics Guangdong Key Laboratory of Information Security State Key Laboratory of Information Security Institute of Information Engineering Chinese Academy of Sciences

In this paper, a family of binary sequences derived from Euler quotients with RSA modulus pq is introduced. Here two primes p and q are distinct and satisfy gcd(pq,(p-1)(q-1))=1. The linear complexities and minimal polynomials of the proposed sequences are determined. Besides, this kind of sequences is shown not to have correlation of order four although there exist some special relations by the properties of Euler quotients.

关键词： Correlation Complexity theory Cryptography Random sequences

Molecular Understanding of Charge Storage in MoS_(2)Supercapacitors with Ionic Liquids

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Energy & Environmental Materials 2021年第4期4卷 631-637页

作者： Zhun Liang chang zhao Wei zhao Yuan Zhang Pattarachai Srimuk Volker Presser Guang Feng State Key Laboratory of Coal Combustion School of Energy and Power EngineeringHuazhong University of Science and TechnologyWuhan Hubei 430074China Nano Interface Center for Energy School of Energy and Power EngineeringHuazhong University of Science and TechnologyWuhan Hubei 430074China Department of Chemical and Biomolecular Engineering Vanderbilt University2201 West End AvenueNashville TN 37235USA INM-Leibniz Institute for New Materials Campus D22Saarbrucken 66123Germany Saarland University Campus D22Saarbrucken 66123Germany

Owing to high electrical conductivity and ability to reversibly host a variety of inserted ions,2D metallic molybdenum disulfide(1 T-MoS_(2))has demonstrated promising energy storage performance when used as a supercapacitor ***,its charge storage mechanism is still not fully understood,in particular,how the interlayer spacing of 1 T-MoS_(2)would affect its capacitive *** this work,molecular dynamics simulations of 1 T-MoS_(2)with interlayer spacing ranging from 0.615 to 1.615 nm have been performed to investigate the resulting charge storage capacity in ionic *** reveal a camel-like capacitance-potential relation,and MoS_(2)with an interlayer spacing of 1.115 nm has the highest volumetric and gravimetric capacitance of118 F cm^(-3)and 42 F g^(-1),*** ions in MoS_(2)with an interlayer spacing of 1.115 nm diffuse much faster than with interlayer spacings of 1.365 and 1.615 nm,the MoS_(2)with larger interlayer spacing has a much faster-charging *** analyses reveal that the ion number density and its charging speed,as well as ion motion paths,have significant impacts on the charging *** work helps to understand how the interlayer spacing affects the interlayer ion structures and the capacitive performance of MoS_(2),which is important for revealing the charge storage mechanism and designing MoS_(2)supercapacitor.

关键词： charge storage mechanism ionic liquids molecular dynamics simulation molybdenum disulfide supercapacitors