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Rare Metals 2015年第6期34卷 395-399页

作者： Sheng-Chu Li Shui-Jiang Hu Ning Du Jia-Neng Fan Li-Jun Xu Jun Xu shaoxing test institute of quality and technical supervision State Key Laboratory of Silicon Materials and Department of Materials Science and Engineering Zhejiang University

A novel and simple chemical reaction method was developed to synthesize dendrite-like La（OH）3 nanostructures which was composed of centripetal arranged La（OH）3 nanorods with diameters of 50-100 nm and lengths of several micrometers. The effect of different alkaline sources on the morphology of La（OH）3 nanostructures was investigated. It is indicated that diethyl- enetriamine acts not only as an alkaline source, but also as a surfactant which induces the centripetal growth of La（OH）3 nanostructures. Moreover, dendrite-like La203 nanostructures were prepared by the calcination of La（OH）3 nanostructures at 750 ℃. The morphology, structure, and composition of the as-synthesized products were characterized by transmission electron microscopy （SEM）, high-resolution transmission electron microscopy, field emission scanning electron microscopy （FESEM）, and X-ray powder diffraction （XRD）.

关键词： Crystal growth Nanomaterials Kinetics

Applications of Mass Spectrometry in Textile Analysis: An Overview

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Journal of Analysis and testing 2024年第4期8卷 518-537页

作者： Yudi Ruan Xianshuang Meng Jiangang Wang Hongwei Wang Qiong Ye Qianyi Shou Qiang Ma Chinese Academy of Inspection and Quarantine shaoxing testing institute of quality and technical supervision

Mass spectrometry (MS) stands as a pivotal tool for chemical analysis in the textile industry, capable of scrutinizing the vast majority of reported harmful chemicals. With the ever-increasing number of banned chemicals in textiles, there is a pressing need for a more systematic compilation of relevant literature on MS utilization to identify and quantify harmful substances in textiles. This article comprehensively reviews the role of MS in textile analysis over the past two decades, encompassing a wide range of sample preparation techniques, such as energy-assisted extraction, solid-phase microextraction, liquid-phase microextraction, and QuEChERS. Furthermore, it delves into MS techniques, such as gas chromatography–MS, liquid chromatography–MS, inductively coupled plasma–MS, ion mobility spectrometry–MS, and ambient ionization MS. Moreover, it offers a brief glimpse into the future of MS development in this field, highlighting ongoing research into additional sample preparation techniques for detecting hazardous chemicals in textiles. Notably, it underscores the growing interest in ambient ionization MS and the coupling of chromatography with high-resolution MS.

关键词： Harmful chemicals Mass spectrometry Sample preparation Textiles

MCM-41 supported nano-sized CuO-CeO2 for catalytic combustion of chlorobenzene

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Journal of Rare Earths 2020年第9期38卷 933-940,I0001页

作者： Jie Zheng Zhu Chen Jianfei Fang Zhuo Wang Shufeng Zuo Zhejiang Key Laboratory of Alternative Technologies for Fine Chemicals Process Shaoxing UniversityShaoxing 312000China quality and technical supervision Inspection Center of Yongkang Yongkang 321300China

In this paper,MCM-41 was synthesized by a soft template technique and MCM-41 supported CuO-CeO2 nano-sized catalysts with different Cu/Ce molar ratios were prepared by a deposition-precipitation method.N2 adsorption,HRTEM-EDS,H2-TPR,XPS characterization,as well as catalytic activity and durability tests for the catalytic combustion of chlorobenzene(CB)were conducted to explore the relationship between the structure and catalytic performance of the *** is revealed that cuCe(6:1)/MCM-41 has the highest activity and can completely catalyze the degradation of CB at 260℃.The reasons for the high activity of the catalysts are as follows:MCM-41,a type of mesoporous material which has large pore size and large specific surface area,is suitable as a catalyst *** average diameter of nano-sized CuO and CeO2 particles is about 3-5 nm and adding CeO2 improves the dispersion of active component CuO,which are highly and evenly dispersed on the surface of *** results also explain why MCM-41 supported CuO-CeO2 with appropriate proportion can highly enhance the catalytic *** reason is that CeO2 acting as an oxygen-rich material can improve the mobility of oxygen species through continuous redox between Ce4^+and Ce3^+,and improve the catalytic performance of CuO for CB ***,CuCe(6:1)/MCM-41 also displays good durability for CB combustion,both in the humid condition and in the presence of benzene,making it a promising catalytic material for the elimination of chlorinated VOCs.

关键词： CuO-CeO2 MCM-41 Nano-sized Chlorobenzene Catalytic combustion Rare earths

A Parzen Window-based Approach to Detection of Infrared Dim Target Under Sea-sky Background

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International Journal of Automation and computing 2016年第5期13卷 447-456页

作者： He Deng Huang Yao Yan-Tao Wei Ji-Dong Chen Department of Information Technology Central China Normal University Wuhan 430079 China Wuhan institute of Physics and Mathematics Chinese Academy of Sciences Wuhan 430079 China shaoxing testing institute of quality and technical supervision Shaoxing 312071 China

People attach great importance to high detection probability and low false alarm probability for infrared dim target detection. Consequently, a novel approach is proposed based on inverted local information entropy map and the improved region growing technique. The idea originates from the intrinsic property of natural image, the visual mechanism of flying insects and the information entropy theory. Besides qualitative analyses, other methods including the norms of local signal-to-background ratio, local signal-to-noise ratio, region non-uniformity, single-frame detection probability and single-frame false alarm probability are adopted to quantitatively evaluate the proposed approach. Both qualitative and quantitative comparisons confirm the validity and efficiency of the proposed approach.

关键词： Dim target detection information entropy Parzen window region growing visual mechanism.

Effect of substitution of aluminum for nickel on electrochemical properties of La_(0.75)Mg_(0.25)Ni_(3.5–x)Co_(0.2)Al_x hydrogen storage alloys

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Journal of Rare Earths 2011年第2期29卷 143-149页

作者：董小平杨丽颖李小亭王青马力辉林玉芳 College of quality and technical supervision Hebei University Department of Functional Material Research Central Iron and Steel Research Institute

La0.75Mg0.25Ni3.5–xCo0.2Alx （x=0–0.09） hydrogen storage alloys were prepared by induction melting and effect of Al substitution for Ni on phase constitution and electrochemical property was *** the substitution of Al for Ni,LaNi5 and LaNi2 phases occurred and （La,Mg）2（Ni,Co,Al）7 phase with hexagonal Ce2Ni7-type structure replaced （La,Mg）2（Ni,Co）7 *** cell volumes of LaNi5 and （La,Mg）2（Ni,Co,Al）7 main phases increased with increasing Al *** electrochemical properties and kinetic parameters of the alloys,including discharge capacity,high rate discharge ability （HRD）,loss angle （ψ）,exchange current density （I0） and limiting current density （IL）,decreased with increasing amount of substitution of Al for *** of Al for Ni could be favorable for positive shift in corrosion potential of the alloy electrode,and prolonged cyclic lifetime of La0.75Mg0.25Ni3.5–xCo0.2Alx （x=0–0.09） alloy electrodes.

关键词： La-Mg-Ni-system alloy hydrogen storage electrode alloys electrochemical property rare earths

Electroencephalogram characters of parallax stereo watching asthenopia

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Journal of Beijing institute of Technology 2014年第2期23卷 196-202页

作者：刘霜吴平东黄杰张贵鑫杨秋玲 School of Mechanical Engineering Beijing Institute of Technology School of quality and technical supervision HeBei University

The electroencephalogram（EEG）characters value of observers can be deduced by collecting brain electrical information when the observers are watching parallax stereo *** characters value will change clearly when watching asthenopia *** investigate the characters of parallax stereo watching asthenopia,the EEG of observers were recorded through the whole watching process of parallax stereo films until watching asthenopia *** recorded EEG data of observers belongs to time-domain *** transform can process these data to frequency spectrum ***αandβwaves average power can be got by Newton-Cotes equation from the *** ratio ofβpower to the sum ofαandβpower,CV,can be defined as EEG characters value of parallax stereo watching asthenopia and used to estimate the asthenopia degree of *** experiments show that the smaller the CVis,the more serious the asthenopia is.

关键词： parallax stereo asthenopia electroencephalogram eigenvalue

Control of magnetic levitation positioning stage with an eddy current damper

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Journal of Beijing institute of Technology 2012年第3期21卷 315-320页

作者：王伟明闪明才马树元唐水源 School of Mechanical Engineering Beijing Institute of Technology School of quality and technical supervision Hebei University

To enhance the system damping,a permanent magnet set which served as an eddy current damper was added to the magnetic levitation positioning stage which consists of a moving table,four Halbach permanent magnetic arrays,four stators and displacement *** dynamics model of this stage was a complex nonlinear,strong coupling system which made the control strategy to be a focus *** nonlinear controller of the system was proposed based on the theory of differential *** simulation and experimental results show that either the decoupling control of the movement can be realized in horizontal and vertical directions,and the control performance was improved by the damper,verifying the validity and efficiency of this method.

关键词： magnetic levitation(maglev) positioning stage eddy current damper nonlinear control feedback linearization

Structures and catalytic performances of Me/SAPO-34(Me=Mn,Ni,Co)catalysts for low-tem perature SCR of NO_x by ammonia

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Journal of Environmental Sciences 2021年第6期33卷 137-149页

作者： Xuesong Liu Zhiming Sui Hongfeng Chen Yong Chen Haigang Liu Peng Jiang Zhongyun Shen Wensheng Linghu Xiaodong Wu College of Chemistry and Chemical Engineering Shaoxing UniversityShaoxing 312000China Key Laboratory of Advanced Materials of Ministry of Education School of Materials Science and EngineeringTsinghua UniversityBeijing 100084China Zhejiang Hailiang Eco.Mater.Co. Ltd.Zhuji 311814China shaoxing testing institute of quality and technical supervision Shaoxing 312000China Chemical Design and Research institute of Qinghai Province Xining 810008China

Me/SAPO-34(Me=Mn,Ni,Co)series of catalysts were prepared by a wetness impregnation method and investigated for the selective catalytic reduction of nitrogen oxides with ammonia(NH 3-SCR).Among them,Mn/SAPO-34 catalyst was found as the most promising candidate based on its superior low-temperature *** catalysts were characterized by X-ray diffraction(XRD),transmission electron microscopy images(TEM),nuclear magnetic resonance(NMR),X-ray photoelectron spectroscopy(XPS),temperature programmed reduction and desorption(TPR and TPD),and diffuse reflectance infrared Fourier transformed spectroscopy(DRIFTS)of NH_(3)/NO_(x)***/SAPO-34 is obviously different from Ni/SAPO-34 and Co/SAPO-34 in the active species state and *** MnO_(x)species which play an essential role in NO oxidation and NO_(2)adsorption,act as better active sites than nickel and cobalt mostly in the form of the aluminates and silicates.

关键词： SAPO-34 Transition metals Low-temperature activity Fast SCR Surface species

Thermo-oxidative ageing behavior of cerium oxide/silicone rubber

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Journal of Rare Earths 2020年第4期38卷 436-444页

作者： Qiang He Guangfei Wang Yong Zhang Zhanjun Li Linghao Kong Wei Zhou Key Laboratory of Aeronautical Special Rubber Anyang Institute of TechnologyAnyang 455000China College of quality and technical supervision Hebei UniversityBaoding 071002China

Cerium oxide/silicon rubber was prepared via mechanical *** and frictional properties,as well as thermal stability after thermo-oxidative ageing were investigated in this rubber composite.3D surface profilometry,scanning electron microscopy(SEM)and thermogravimetry analysis(TGA)were used to study the friction surface characteristics,friction mechanism and thermal stability,***,swelling experiments were carried out to investigate the variation of crosslinking *** thermo-oxidative ageing,the tear strength of cerium oxide/silicon rubber ***,in the early ageing stage,improvements in tensile strength,elongation at break,and frictional performance are caused by crosslinking density ***,the addition of cerium oxide remarkably improves the re-cross linking degree during ageing process,which in turn decreases the number of holes on the friction surface and endows the silicon rubber with better mechanical and frictional properties,as well as thermo-oxidative ageing resistance.

关键词： Cerium oxide/silicone rubber Thermo-oxidative ageing Mechanical property Frictional property Thermal stability Rare earths

Fabrication and Photoluminescence Properties of Hexagonal Micro-pyramids ZnO Powders by Combustion Synthesis

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Journal of Wuhan University of Technology(Materials Science) 2011年第4期26卷 700-702页

作者：陈皑张英 Zhoushan institute of Calibration and testing for Qualitative and technical supervision

The ZnO powder with hexagonal-pyramids structure was prepared by the low-temperature combustion process. Ammonium acetate was used as the fuels, whereas zinc nitrate acted as the oxidant. The effect of different ration between fuel and oxidant on the morphology and photoluminescence （PL） characteristic was studied. The formation of hexagonal-pyramids structure was discussed. The optimum preparing parameter for fine morphology is that the ratio of zinc nitrate and ammonium acetate is 1：5, and ignition temperature is 500 ℃. The PL measurement indicates all samples have the strong blue and yellow emission peak. The changes of surface energy of the polar surfaces result in the formation of micro-pyramids structure.

关键词： ZnO combustion synthesis PL morphology