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DV-Hop Localization Algorithm with Weight-based Oriented Cuckoo Search Algorithm 36

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DV-Hop Localization Algorithm with Weight-based Oriented Cuc...

Group tracking control of second-order multi-agent systems 36

第36届中国控制会议

作者： Maoqing Zhang Zhuanghua Zhu Zhihua cui Complex System and Computational Intelligence Laboratory Taiyuan University of Science and Technology Shanxi Finance & Taxation College

ISBN: (纸本)9781538629185

Oriented cuckoo search algorithm（OCS） is a newly proposed variant of cuckoo search algorithm,to avoid the premature convergence,weighted-based oriented cuckoo search（WOCS） is proposed which is a combination of OCS and the standard *** achieves a balance between exploration and *** test the performance,WOCS is incorporated into the methodology of DV-Hop localization algorithm for node localization in wireless sensor *** simulation results show that DV-Hop localization with WOCS achieves best positioning accuracy when compared with other two algorithms.

关键词： DV-Hop localization algorithm Wireless sensor network Weighted-based oriented cuckoo search Premature convergence Positioning accuracy

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Group tracking control of second-order multi-agent systems

A New Fluorescence Resonance Energy Transfer Probe for Detection of Hg2+ and Al3+ Based on 1,8-Naphthalimide-Rhodamine dyads

第36届中国控制会议

作者： Lin Shi Qing cui Dongmei Xie Department of Mathematics Tianjin University

ISBN: (纸本)9781538629185

This paper focuses on studying the group consensus tracking issue of discrete time second-order multi-agent systems（MASs） under directed fixed and Markovian switching topologies, respectively. For MASs with m leaders, we first introduce a method to divide the whole MASs into m subgroups. Based on the subgroup-divided method, the condensation directed graph G of the communication topology of the whole MASs becomes a directed acyclic graph（DAG）. Then, for MASs with fixed/Markovian switching topology, some sufficient/necessary and sufficient group consensus tracking criteria are established.

关键词： Multi-agent systems(MASs) subgroup-divided method group tracking Markovian switching topologies

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A New Fluorescence Resonance Energy Transfer Probe for Detec...

Role of the reduction site in the fluorinated or sulfated TiO_2 photocatalytic process

河南省化学会2016年学术年会

作者： cui jingjing Zhengkang Liu Yunchang Fan lei Zhang Jichuan Kong College of Chemistry and Chemical Engineering Henan Polytechnic University

The research of fluorescent probe has received tremendous attention of chemists in the last two decades. The fluorescent probe has excellent properties such as good selectivity, high sensitivity, easy to operate and low toxicity et al. It has been widely used in the recognition and sensing of biologically and environmentally important species such as metal ions, anion, small biological activity *** this paper, the fluorescent probe L1, using Rh B and 1, 8-naphthalene as raw material, was synthesized, which has a sensitive fluorescent response to Hg, Al. In acetonitrile/4-hydroxy-1-piperazineethanesulfonic acid buffer solution, Compound L1 has a dual response to the metal ions with the colormetry and the fluorometry, After addition of Hg and Al, the UV Vis spectra of the compound L1 exhibanted strongly absorb spectrum at about 561 nm, and the solution turned from light green to orange. The fluorescence spectrum of compound L1 appeared the characteristic peak of naphthalene at 540nm;upon the addition of Hg and Al, the emission band of 540 nm disappeared gradually, followed by the strong fluorescence at 583 nm, as a result, the fluorescent color changed from green to orange, due to the fluorescence resonance energy from naphthalimide to rhodamine B(FRET).

关键词： Rh B 1 8-naphthalene fluorescence resonance energy transfer Hg2+ Al3+

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Journal of Environmental Sciences 2007年第10期19卷 1239-1244页

作者： YANG Shi-ying HU Hong CHEN You-yuan ZHENG Jian-guo cui Ying-jie Key Lab of Marine Environmental Science and Ecology Ministry of Education Ocean University of China Qingdao 266100 China College of Environmental Science and Engineering Ocean University of China Qingdao 266100 China

In this article, the effects of ZiO2 surface fluorination and sulfation, on the active oxygen species formed at the reduction site in the photocatalytic process, namely O2^＊- and H2O2, were investigated from a new perspective. The superoxide radical, （O2^＊-）, was determined by colorimetry of nitroblue tetrazolium, a prominent O2^＊- scavenger. Hydrogen peroxide （H2O2） was estimated by using the iodide-starch method. In the naked TiO2 photocatalysis, O2^＊-, though less reactive, was a very important intermediate. When the TiO2 surface was fluorinated, more O2^＊- and H2O2 were produced, which indicated that the surface modification could greatly reduce the recombination of photogenerated electrons and holes, thus enhancing the photocatalytic rate. In the sulfated system, photocatalysis proceeded with a more complicated mechanism. These results added support to the view of fluoride-induced enhancement and sulfide＇s nonappreciable inhibition effect.

关键词： TiO2 photocatalysis superoxide radicals surface modification initial mechanism

Ultrafast one-step synthesis of N and Ti^3＋ codoped TiO2 nanosheets via energetic material deflagration

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Nano Research 2018年第9期11卷 4735-4743页

作者： Yousong Liu Shuxin Ouyang Wencan Guo Hehou Zong Xudong cui Zhong Jin Guangcheng Yang Institute of ChemicaI Materials China Academy of Engineering Physics Mianyang 621900 China TU-NIMS Joint Research Center School of Materials Science and Engineering Tianjin University Tianjin 300072 China Institute of Fluid Physics China Academy of Engineering Physics Mianyang 621900 China Key Laboratory of Mesoscopic Chemistry of MOE and Collaborative Innovation Center of Chemistry for Life Sciences School of Chemistry and Chemical Engineering Nanjing University Nanjing 210023 China

An energetic-material （NAN3） deflagration method for preparing N- and Ti3＋-codoped TiO2 nanosheets （NT-TiO2） was developed. In this method, N radicals filled the crystal lattice, and Na clusters captured partial O from TiO2. The deflagration process was fast and facile and can be completed within 〈 I s after ignition. The obtained NT-TiO2 exhibited rough surfaces with nanopits and nanoholes. The doping concentration can be regulated by controlling the NaN3 addition. The NT-TiO2 samples showed significant enhancements in the visible-light absorption and photoelectric response. The simultaneously produced N radicals and Na clusters from NaN3 deflagration served as N sources and reduction agents, respectively. Additionally, the high deflagration temperature/ pressure improved the reactivity of N radicals and Na dusters. Thus, the present NaN3 deflagration method was demonstrated as an ultrafast and effective approach to fabricate NT-TiO2 with a visible-light response. The proposed NaN3 deflagration method allows the ultrafast synthesis of new functional materials via the efficient deflagration of energetic materials.

关键词： NaN3 deflagration N radicals and Na nanoclusters ultrafast doping N Ti^3+ codoped TiO2 visible-light response

一种快速高精度激光CCD自准直仪圆目标中心的定位方法

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光学学报 2007年第2期27卷 253-258页

作者：敖磊谭久彬崔继文康文静哈尔滨工业大学超精密光电仪器工程研究所哈尔滨150001

为满足高精度测量和瞄准跟踪系统中对激光CCD自准直仪的测量精度和实时性的要求,提出一种快速高精度激光CCD自准直仪圆目标中心的定位方法。首先利用变结构元广义形态学边缘检测算法,充分提取图像边缘细节信息的同时抑制图像噪声的影响... 详细信息

为满足高精度测量和瞄准跟踪系统中对激光CCD自准直仪的测量精度和实时性的要求,提出一种快速高精度激光CCD自准直仪圆目标中心的定位方法。首先利用变结构元广义形态学边缘检测算法,充分提取图像边缘细节信息的同时抑制图像噪声的影响,然后采用多项式插值算法对圆目标轮廓进行快速亚像素定位,最后利用最小二乘拟合方法实现了圆目标中心的精确定位。实验结果表明,该定位方法稳定性好,定位精度高且实时性强,应用该方法改进后激光CCD自准直仪的测量精度由2″提高到±0.25″,且单次测量时间小于0.23s,可满足激光CCD自准直仪在小角度测量和瞄准跟踪等领域的高精度实时测量需求。

关键词：激光CCD自准直仪变结构元广义形态学多项式插值亚像素定位最小二乘拟合

Pressure-induced bimetallic carbon nanotubes from metalorganic frameworks as optimized bifunctional electrocatalysts for water splitting

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Rare Metals 2023年第1期42卷 155-164页

作者： Hong-Xu Chen Hui Xu Zhi-Rong Song Yi Liu Hui cui Jun-Kuo Gao Key Laboratory of Rare Earth Optoelectronic Materials and Devices of Zhejiang Province Institute of Optoelectronic Materials and DevicesCollage of Optical and Electronic TechnologyChina Jiliang UniversityHangzhou310018China Institute of Functional Porous Materials School of Materials Science and EngineeringZhejiang Sci-Tech UniversityHangzhou310018China Institute for Composites Science Innovation School of Materials Science and EngineeringZhejiang UniversityHangzhou310027China Argonne National Laboratory Physics DivisionLemontIL60439USA Department of Chemistry and International Institute for Nanotechnology(IIN) Northwestern UniversityEvanstonIL60208USA

Carbon nanotubes(CNTs)have attracted great interest in numerous applications due to their excellent electronic and structural ***,harsh synthesis conditions and high energy consumption limit the further application of ***,we developed a facile and innovative strategy to generate CNTs by physically pressurizing metal-organic frameworks(MOFs)and then *** synthesized bimetallic nitrogen/sulfur double-doped carbon nanotubes are denoted as Fe_(x)Co_(1-x)P(x=0.5,0.6,0.7,0.8,0.9).The introduction of pressure not only revolutionized the morphology of the electrocatalysts,but also enhanced the activity of oxygen evolution reaction(OER)and hydrogen evolution reaction(HER)in alkaline ***_(0.6)Co_(0.4)-P exhibits superior OER and HER performances in 1.0 mol·L^(-1)KOH solution with overpotentials of 364 and 346 mV at 10 mA·cm^(-2),which are 28 and 5 mV lower than unpressurized Fe0.6Co0.4.

关键词： Metal-organic frameworks(MOFs) Carbon nanotubes(CNTs) Bifunctional Pressurizing Oxygen evolution reaction(OER) Hydrogen evolution reaction(HER)

A CODING SCHEME USING GLOBAL MOTION ESTIMATION FOR AVS P-FRAME

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Journal of Electronics(China) 2007年第6期24卷 815-820页

作者： Gong Shengrong Guo Li cui Zhiming School of Computer Science and Technology Soochow University Suzhou 215006 China

Block matching has been used for motion estimation and motion compensation in the Au- dio and Video Standard (AVS) for years. While having an acceptable performance in describing mo- tion between frames, it requires quite a few bits to represent the motion vectors. In certain circum- stances, the use of global motion estimation and compensation would perform equally well or even better than the block matching in terms of motion accuracy, while it results in the coding of global motion model parameters. In this letter, we modify an AVS coder by adding (1) six global motion model parameters to the frame header, and (2) mode selection among INTRA, SKIP, INTER-16×16, INTER-16×8, INTER-8×16, INTER-8×8, and Global Motion Compensation (GMC) modes by La- grange optimal rate-distortion criteria. Simulation results demonstrate that over 0.1dB improvement in PSNR is obtained compared to the AVS coder for an average coded P-frame with the same bit- rate.

关键词： Coding scheme Motion compensation Motion estimation Audio and Video Standard (AVS)

Precipitation-dissolution behaviors of rare earth ions in H_3PO_4-Ca(H_2PO_4)_2 solutions

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Journal of Rare Earths 2019年第5期37卷 520-527页

作者： Shengxi Wu Longsheng Zhao Liangshi Wang Xiaowei Huang Yunhan Zhang Zongyu Feng Dali cui National Engineering Research Center for Rare Earth Materials General Research Institute for Nonferrous Metals School of Metallurgical and Ecological Engineering University of Science and Technology Beijing (USTB)

In order to achieve deeper understanding of rare earth elements(REEs) behaviors during phosphate rock processing with H_3PO_4. The solubility of REEs in Ca(H_2PO_4)_2-H_3PO_4 solutions with various concentrations of Ca(H_2PO_4)_2 at different temperatures were tested. The results demonstrate that REEs solubility decreases sharply with the increasing concentration of Ca(H_2PO_4)_2. Equations between [REE^(3+)] and [H^+],[H^+] and [Ca^(2+)] in Ca(H_2PO_4)_2-H_3PO_4 solutions were built based on the precipitation-dissolution equilibrium of rare earth phosphates and the ionization equilibrium of H_3PO_4. According to the equations, the decreasing mechanism of REEs solubility caused by elevated concentration of Ca(H_2PO_4)_2 was determined. The mechanism can be illustrated as that the elevated concentration of [H_2 PO_4^-] decreases the concentration of hydrogen ion by retarding the ionization process of H_3PO_4 and directly promotes the precipitation of rare earth phosphates. Furthermore, it can be easy deduced that similar effect would be caused by the other cation impurities(Fe^(3+), Al^(3+), etc.) on REEs solubility based on the mechanism. In addition, superimposed reduction effect on REEs solubility caused by the elevated concentration of Ca(H_2PO_4)_2 and the elevated temperature is found. This superimposed effect leads to a super low solubility of REEs in Ca(H_2PO_4)_2-H_3PO_4 solution. On the basis of the experimental study, outlooks and suggestions for further development of REEs recovery method are given.

关键词： Rare earth elements Phosphoric acid Monocalcium phosphate Solubility Temperature