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No external load measurement strategy for micro thermoelectric generator based on high-performance Si_(1-x-y)Ge_(x)Sn_(y) film

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Journal of Materiomics 2021年第4期7卷 665-671页

作者： Ying peng Sijing Zhu Huajun Lai Jie Gao Masashi Kurosawa Osamu Nakatsuka Sakae Tanemura Biaolin peng Lei Miao Guangxi Key Laboratory of Information Material School of Material Science and EngineeringGuilin University of Electronic TechnologyGuilin541004China Department of Materials Physics Graduate School of EngineeringNagoya UniversityNagoya464-8603Japan PRESTO Japan Science and Technology Agency4-1-8HonchoKawaguchiSaitama332-0012Japan Institute of Materials and Systems for Sustainability Nagoya UniversityNagoya464-8601Japan Japan Fine Ceramics Center 2-4-1 MutsunoAtsuta-kuNagoya456-8587Japan Center on Nanoenergy Research Guangxi Key Laboratory of Processing for Non-ferrous Metal and Featured MaterialsGuangxi Key Laboratory for Relativity AstrophysicsNanning530004China Department of Materials Science and Engineering SIT Research LaboratoriesInnovative Global ProgramFaculty of EngineeringShibaura Institute of TechnologyTokyo135-8548Japan

In this study,a micro in-plane p-type thermoelectric generator(TEG),which consists of thin-film Si_(1-x-y)Ge_(x)Sn_(y) ternary alloy semiconductor on insulator,is developed to make efficient use of waste heat such as human body.A power factor value as high as 1095 mWm^(-1) K^(-2) had been achieved using Bion implanted and short-term rapid thermal annealing(RTA)*** addition,a measuring scheme for micro TEG without external load resistance was *** one measuring session,multiple parameters can be *** micro single-arm TEG prepared by semiconductor process can output 0.29 nW power at a temperature difference of 15 K,and a cross-sectional power density has reached up to 0.58 mW/cm^(2),which is a superior value for wearable *** findings of this study have important reference value for wearable device performance improvement and output power measuring of micro TEG.

关键词： Si_(1-x-y)Ge_(x)Sn_(y) film P-type TEG No external load measurement Ambient power density

A high stability high voltage power supply design for HEPS injection system

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Radiation Detection Technology and Methods 2021年第4期5卷 564-569页

作者： peng Liu Jinhui Chen Guanwen Wang Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China University of Chinese Academy of Sciences Beijing 100049China

Purpose The high energy photon source(HEPS)uses the on-axial injection *** are two designs in this injection scheme that are critical to the performance of the HEPS injection *** is the strip line kicker and another is the high voltage fast pulse power supply *** the high voltage fast pulse power supply system,the design of high voltage power supply is very *** output voltage stability of high voltage power supply directly affects the stability of the pulse amplitude of the injection *** A high voltage power supply with high output voltage stability is designed in this paper,and the scheme is *** correctness of the design scheme is verified by simulation *** A prototype is built for full *** test results showed that the output voltage stability is lower than 58 *** output voltage is 6.4 mV(f≤3 kHz)/113.2 mV(f>3 kHz).Conclusions The designed high voltage power supply can fully meet the requirements of the HEPS injection system.

关键词： HEPS Injection system High stability Voltage ripple High voltage power supply

The Evaluation of a Resin-modified Glass Ionome Cement for Bonding Orthodontic Brackets

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Journal of Wuhan University of Technology(Materials Science) 2009年第6期24卷 986-991页

作者：李福军 Hospital of Stomatology Wuhan University

To evaluate the shear bond strength（SBS） and bond failure interface after the debonding of orthodontic brackets with a resin-modified glass ionomer cement（RMGIC） under six bonding conditions, 140 premolar teeth were randomly divided into seven groups. The brackets of all groups, except for control group, were bonded using a RMGIC. The teeth were debonded using a universal testing machine. The shear bond strength, adhesive remnant index （ARI） and enamel fracture were examined for each debonding. A significant difference existed in SBS under wet and dry conditions in two groups of Fuji Ortho LC. Different degree of enamel fracture was seen in groups of Fuji Ortho LC（dry/37% phosphoric acid treated） after debonding. Bond failed predominantly at the enamel-adhesive interface, except for phosphoric acid treated groups. The RMGIC achieve a clinically effective adhesion in orthodontics under different bonding conditions.

关键词： evaluation resin-modified glass ionomer bonding brackets

New Explorations on Cannon's Contributions and Generalized Solutions for Uniform Linear Motion Blur Identification

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Journal of Computer Science & Technology 2012年第1期27卷 174-186页

作者： Lu Wang Hong-Yan Zhang Si-Long peng The National Engineering and Technology Research Center for ASIC Design Institute of AutomationChinese Academy of SciencesBeijing 100190China The Key Laboratory of Complex Systems and Intelligence Science Institute of AutomationChinese Academy of Sciences Beijing 100190China Sino-European Institute of Aviation Engineering Civil Aviation University of ChinaTianjin 300300China

Existing frequency-domain-oriented methods of parameter identification for uniform linear motion blur （ULMB） images usually dealt with special scenarios. For example, blur-kernel directions were horizontal or vertical, or degraded images were of foursquare dimension. This excludes those identification methods from being applied to real images, especially to estimate undersized or oversized blur kernels. Pointing against the limitations of blur-kernel identifications, discrete Fourier transform （DFT）-based blur-kernel estimation methods are proposed in this paper. We analyze in depth the Fourier frequency response of generalized ULMB kernels, demonstrate in detail its related phase form and properties thereof, and put forward the concept of quasi-cepstrum. On this basis, methods of estimating ULMB-kernel parameters using amplitude spectrum and quasi-cepstrum are presented, respectively. The quasi-cepstrum-oriented approach increases the identifiable blur-kernel length, up to a maximum of half the diagonal length of the image. Meanwhile, directing toward the image of undersized ULMB, an improved method based on quasi-cepstrum is presented, which ameliorates the identification quality of undersized ULMB kernels. The quasi-cepstrum-oriented approach popularizes and applies the simulation-experiment- focused DFT theory to the estimation of real ULMB images. Compared against the amplitude-spectrum-oriented method, the quasi-cepstrum-oriented approach is more convenient and robust, with lower identification errors and of better noiseimmunity.

关键词： Fourier amplitude spectrum phase perpendicular relation uniform linear motion blur identification quasicepstrum

The development of residential space in the old town of Nanjing since 1978

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Frontiers of Architectural Research 2012年第3期1卷 280-286页

作者： Kun Liu Jianguo Wang peng Tang School of Architecture Southeast UniversityNanjing 210096China

Since the 1990s, with peopte＇s living requirements getting more and more advanced, the speed of the residential commercialization gets higher and higher, which promotes the residential construction deeply. To some extent, the construction of residential area has accelerated the urbanization and impacted the progress of urban renewal. It has already happened in most Chinese major cities and is progressing right now. But it has not been shown clearly in existing researches how and how deeply it impacts the development of urban construction. This article discussed how the development of urban residential space impacted the progress of urban renewal, based on the theoretic researches of urban renewal, taking the otd town of Nanjing for example, and using the methods of quantitative evidence method and kernel density estimation.

关键词： Residentiat space The old town of Nanjing Urban renewat Kernel density estimation

A New Highly-Enantioselective Synthetic Process for Producing (S)-2-Hydroxybutyric Acid Methyl Ester

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Wuhan University Journal of Natural Sciences 2015年第4期20卷 335-342页

作者： peng Hui GUI Houying ZHOU Qiuming School of Chemistry Chemical Engineering and Life SciencesWuhan University of Technology

（S）-2-aminobutyric acid being initial raw material,（S）-2-hydroxybutyric acid methyl ester was synthesized by means of a three step reaction of hydroxylation, salification and esterification. The product had a yield rate of 60.4%, purity of 99% and ee value higher than 99% by characterization of GC, HPLC and 1H NMR. This synthesis technique has advantages of high purity and ee value, low cost, short reaction time and mild reaction conditions so that it is suitable for production on industrial scale.

关键词： (S)-2-hydroxybutyric acid methyl ester (S)-2-hydroxyl butyric acid chiral drug intermediate esterification

Development of environmental management system in China’s financial sector

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Frontiers of Environmental Science & Engineering 2008年第2期2卷 172-177页

作者： Miao CHANG Lijuan peng Shiwen WANG Department of Environmental Science&Engineering Tsinghua UniversityBeijing 100084China Center for Environment and Development Chinese Academy of Social SciencesBeijing 100732China

The establishment of the environmental management system in the financial sector can be effectively promoted through the introduction of the environmental protection concept and its implementation by the financial *** impact of a sustainable development system on the sector is analyzed in this article from three aspects:environmental risk assessment,financing support for environmental protection projects,and financial services to environmentally friendly corporations and *** factors on the development of the environmental management system in China’s financial sector are discussed from the perspective of various entities such as financial institutions,financial regulation authorities,environmental protection departments,corporations,and the *** is pointed out that China’s financial sector is now in the transitional phase from a defensive attitude to a preventive *** governmental guidance,the supervision of regulators as well as public awareness of environmental protection should be used to enhance the initiative in the development of the environmental management system in the Chinese financial sector.

关键词： financial sector environmental management environmental risk assessment environmental protection project environmentally friendly behavior

Lightweight 3D bioprinting with point by point photocuring

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Bioactive Materials 2021年第5期6卷 1402-1412页

作者： peng Zhang Haoxuan Wang peng Wang Yating Zheng Linxiang Liu Jun Hu Yande Liu Qing Gao Yong He School of Mechatronics&Vehicle Engineering East China Jiaotong UniversityNanchang330013China State Key Laboratory of Fluid Power and Mechatronic Systems School of Mechanical EngineeringZhejiang UniversityHangzhou 310027China Engineering for Life Group(EFL) Suzhou215000China Zhejiang University Hospital Zhejiang UniversityHangzhouZhejiang 310027China

As photocrosslinkable materials,methacryloyl-modified hydrogels are widely used as bioinks in tissue *** printing methods to use these hydrogels,including changing the viscosity of the material or mixing them with other printing components,have been explored,but their application has been limited due to low printing quality or high *** addition,the complex operation of bulky equipment restricts the application of these existing printing *** study presents a lightweight stereolithography-based three-dimensional(3D)bioprinting system with a smart mechanical and structural *** developed bioprinter dimensions were 300 mm×300 mm×200 mm and it can be placed on a *** equipment has a mini bioink chamber to store a small amount of bioink for each *** systematically investigated the point-by-point curing process in the 3D bioprinting method,which can print mixed cells accurately and have good ***,we provide a compact,low-cost stereolithography bioprinting system with excellent biocompatibility for 3D bioprinting with methacryloyl-modified *** can be potentially used for drug screening,studying pathological mechanisms,and constructing biological disease models.

关键词： Three-dimensional(3D)bioprinting Stereolithography bioprinting system Compact Low-cost Tissue engineering Cell printing

Current control for a shunt hybrid active power filter using recursive integral PI

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控制理论与应用（英文版） 2009年第1期7卷 77-80页

作者： Wei ZHAO An LUO Ke peng Xia DENG College of Electrical and Information Engineering Hunan University Changsha Hunan 410082 China

This paper presents a current control method for a shunt hybrid active power filter （HAPF） using recursive integral PI algorithm. The method improves the performance of the HAPF system by reducing the influence of detection accuracy, time delay of instruction current calculation and phase displacement of output filter. Fuzzy logic based set-point weighing algorithm is combined in the control scheme to enhance its robustness and anti-interference ability. The proposed algorithm is easy to implement for engineering applications and easy to compute. Experiment results have verified the validity of the proposed controller. Furthermore, the proposed recursive integral PI algorithm can also be applied in the control of periodic current as in AC drivers.

关键词： Power electronics Shunt hybrid active power filter Recursive integral PI Fuzzy inference