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Efficient VLSI Design and Implementation of Integer Motion Estimation for H.264 SDTV Encoder

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Efficient VLSI Design and Implementation of Integer Motion E...

2006 8th International Conference on Solid-State and Integrated Circuit Technology

作者： Chun-Gan Peng Dun-Shan Yu xi-xin cao Shi-Min Sheng SoC Lab. Department of MicroelectronicsPeking University

ISBN: (纸本)1424401607

＜正＞In this paper,the VLSI hardware complexity for H.264 integer motion estimation is analyzed,several hardware-reduction techniques are investigated and a Sot-SAD-Tree VLSI structure based on SAD-Tree is *** this Sot-SAD-Tree structure,the whole data path width is reduced to 50%,and the H.264 encoder with large frame and complex motion vector can be VLSI implementation with acceptable hardware cost. Finally,a complete H.264 SDTV integer motion estimation VLSI architecture with 16×256 parallelism is designed and implemented.

关键词： Very large scale integration Motion estimation Hardware Frequency Parallel processing Cost function Logic arrays Microelectronics Bellows Fellows

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沙漠砂混凝土力学性能试验研究

山西建筑 2025年第1期51卷 103-105,111页

作者：曹喜新疆兵团勘测设计院集团股份有限公司新疆乌鲁木齐830002

研究了不同沙漠砂单掺、沙漠砂-矿渣粉复掺以及沙漠砂-矿渣粉-钢纤维三掺量对沙漠砂混凝土(Desert Sand Concrete, DSC)抗压强度、劈裂抗拉强度的影响,结果表明,随着沙漠砂掺量的增加,混凝土的抗压强度先增加后减小,当掺量为20%时达到... 详细信息

研究了不同沙漠砂单掺、沙漠砂-矿渣粉复掺以及沙漠砂-矿渣粉-钢纤维三掺量对沙漠砂混凝土(Desert Sand Concrete, DSC)抗压强度、劈裂抗拉强度的影响,结果表明,随着沙漠砂掺量的增加,混凝土的抗压强度先增加后减小,当掺量为20%时达到最佳状态;矿渣粉掺量20%时显著提高了混凝土的强度;钢纤维掺量在0.8%时对抗压强度和劈裂抗拉强度的提升效果最为显著。沙漠砂、矿渣粉钢纤维的加入能够改善混凝土的孔隙结构,钢纤维的桥接作用有效阻止裂缝扩展,对增强材料韧性最为显著。

关键词：沙漠砂矿粉钢纤维抗压强度劈拉强度

Orbitronics for energy-efficient magnetization switching

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Science China(Information Sciences) 2025年第1期 398-399页

作者： Yuxuan YAO Daoqian ZHU Qingtao xiA Jianing LIANG Yuhao JIANG Zhiyang PENG Jiaxu LI Chen xiAO Renyou XU Wenwen WANG xiantao SHANG Shiyang LU Dapeng ZHU Hong-xi LIU Kaihua cao Weisheng ZHAO Fert Beijing Institute School of Integrated Circuit Science and Engineering Beihang University National Key Lab of Spintronics Institute of International Innovation Beihang University Qingdao Research Institute Beihang University Truth Memory Corporation

Spin-orbit torque （SOT）,as a promising writing method for magnetic random-access memory （MRAM）,has garnered widespread interest for over a decade [1].Heavy metals,such as β-W,have been broadly adopted as spin current sources,but suffer from phase change at a limited thickness,resulting in a dramatic reduction of the charge-tospin conversion efficiency θSH[2].The thickness limitation leads to stringent etching conditions and large distribution among devices,posing challenges for simultaneously satisfying SOT efficiency,etching-stop margins,and back-end-ofline （BEOL） compatibility.

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Electromagnetic Radiation Mechanism Analysis and Field Strength Prediction of an Elementary Digital Inverter with Cables

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Chinese Journal of Electrical Engineering 2022年第3期8卷 37-48页

作者： Junping He xin Li Sili Tao Lingling cao xi Wang Power Electronics Center Harbin Institute of TechnologyShenzhenShenzhen 518055China

In this paper,common mode(CM)and differential mode(DM)far-field radiation models of a typical digital inverter with cables are built up to predict electromagnetic field strength and analyze field *** CM current model and its analyses are based on the imbalance difference *** is found out that the voltage between the drain and the source electrodes of upper transistor is the key equivalent source of electromagnetic interference(EMI).Far-field radiation strength of the digital inverter in free space is predicted by using the asymmetrical antenna radiation method and current loop radiation *** accuracy of these methods is verified by the CST electromagnetic simulation results in the frequency range from 1 MHz to 400 ***,the radiation models are improved by using the mirror method,which enables to include the reflection effect of the metal ground plane at the electromagnetic compatibility(EMC)test *** the results of measurements in a semi-anechoic chamber and the simulation results confirm the proposed electromagnetic radiation prediction method.

关键词： Far-field radiation common mode model prediction of electromagnetic radiation digital inverter

Synthesis,Crystal Structure and Antitumor Activity of a Ca(Ⅱ) Coordination Polymer Based on 4-Acetylphenoxyacetate Ligands

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Chinese Journal of Structural Chemistry 2021年第3期40卷 324-328,272页

作者： cao Shu-Hua TAI xi-Shi xin Chun-Ling College of Chemistry and Chemical Engineering Weifang UniversityWeifang 261061China

A novel Ca(Ⅱ) coordination polymer,[Ca L_(2)(H_(2)O)_(2)]_(n) (1,HL=4-acetylphenoxyacetic acid) has been synthesized with 4-acetylphenoxyacetic acid,Ca(ClO_4)_(2)·4H_(2)O and Na OH as raw *** 1 was characterized by elemental analysis and single-crystal X-ray diffraction *** results show that the Ca(Ⅱ)ion is eight-coordinated in a distorted triangular dodecahedral geometric configuration with six carboxylate Oatoms of four L ligands and two O atoms of two coordinated water *** 1 forms a one-dimensional chained structure by the bridging effect of carboxylate O *** antitumor activity of HLligand and complex 1 has also been investigated.

关键词： 4-acetylphenoxyacetic acid Ca(Ⅱ)coordination polymer synthesis crystal structure antitumor activity

Structural characteristics,dispersion,and modification of fibrous brucite

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International Journal of Minerals,Metallurgy and Materials 2014年第1期21卷 82-88页

作者： xi cao xiu-yun Chuan Key Laboratory of Orogen and Crust Evolution of the Education Ministry of China School of Earth and Space SciencesPeking University

Fibrous bmcite has very unique structure and physical properties. Brucite fibers were exfoliated into single nanofibers by using dioctyl sodium sulfosuccinate （AOT） as a dispersant through mechanical agitation and ultrasonic dispersion; and then, the nanofibers were modified by stearic acid and （3-aminopropyl）triethoxysilane （y-APS） compound modification agent. The nanofibers were characterized by using X-ray diffraction （XRD）, scanning electron microscopy （SEM）, transmission electron microscopy （TEM）, Fourier transform infrared spectroscopy （FTIR）, and thermal gravimetric analysis. It is found that AOT has good effect on the dispersion. The single fiber has a consis- tent morphology, and fibrous bmcite is dispersed and modified without destroying the crystal structure. Infrared and thermal analysis shows that the surface modification of fibrous brucite is achieved by forming chemical bonds between the coupling agent and magnesium hydroxide.

关键词： fibrous brucite dispersion nanofibers surface treatment modification

Selective CO_(2)Electroreduction to Multi-Carbon Products on Organic-Functionalized CuO Nanoparticles by Local Micro-Environment Modulation

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Nano-Micro Letters 2024年第12期16卷 120-132页

作者： Shan Ren xi cao Qikui Fan Zhimao Yang Fei Wang xin Wang Licheng Bai Jian Yang Materials Interfaces Center Shenzhen Institutes of Advanced TechnologyChinese Academy of SciencesShenzhen 518055GuangdongPeople’s Republic of China Key Laboratory of Functional Molecular Solids Ministry of EducationCollege of Chemistry and Materials ScienceAnhui Normal UniversityWuhu 241002AnhuiPeople’s Republic of China School of Physics Xi’an Jiaotong UniversityXi’an 710049ShaanxiPeople’s Republic of China College of Materials Science and Engineering Shenzhen UniversityShenzhen 518071GuangdongPeople’s Republic of China

Surface functionalization of Cu-based catalysts has demonstrated promising potential for enhancing the electrochemical CO_(2)reduction reaction(CO_(2)RR)toward multi-carbon(C2+)products,primarily by suppressing the parasitic hydrogen evolution reaction and facilitating a localized CO_(2)/CO concentration at the *** upon this approach,we developed surface-functionalized catalysts with exceptional activity and selectivity for electrocatalytic CO_(2)RR to C_(2+)in a neutral *** CuO nanoparticles coated with hexaethynylbenzene organic molecules(HEB-CuO NPs),a remarkable C_(2+)Faradaic efficiency of nearly 90%was achieved at an unprecedented current density of 300 mA cm^(-2),and a high FE(>80%)was maintained at a wide range of current densities(100-600 mA cm^(-2))in neutral environments using a flow ***,in a membrane electrode assembly(MEA)electrolyzer,86.14%FEC2+was achieved at a partial current density of 387.6 mA cm^(-2)while maintaining continuous operation for over 50 h at a current density of 200 mA cm^(-2).In-situ spectroscopy studies and molecular dynamics simulations reveal that reducing the coverage of coordinated K⋅H2O water increased the probability of intermediate reactants(CO)interacting with the surface,thereby promoting efficient C-C coupling and enhancing the yield of C_(2+)*** advancement offers significant potential for optimizing local micro-environments for sustainable and highly efficient C_(2+)production.

关键词： CO_(2)electroreduction to C_(2+) Neutral electrolyte Organic-functionalized CuO nanoparticles Local micro-environment

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Geoscience Frontiers 2023年第5期14卷 91-107页

作者： Miruo Lin Kelai xi Yingchang cao Rukai Zhu xiaobing Niu Honggang xin Weijiao Ma Key Laboratory of Deep Oil and Gas China University of Petroleum(East China)Qingdao 266580China Research Institute of Petroleum Exploration and Development PetroChinaBeijing 100083China PetroChina Changqing Oilfield Company Xi’an 700018China

The formation mechanism of micron-to centimeter-scale sedimentary cycles in lacustrine shales is a hot topic of research,because these small-scale sedimentary cycles significantly influence shale-oil distribution ***-frequency paleoenvironmental evolution is an important controlling factor for the formation of small-scale sedimentary ***,the driving factors of high-frequency paleoenvironmental evolution and the formation process of sedimentary cycles under its constraint remain *** this study,which focuses on lacustrine shales,we find that the alternating deposition of variable thickness of organic-rich lamina(ORL)and silty-grained felsic lamina(SSFL)form sedimentary cycles on the micron to centimeter scale in the Chang 73 sub-member of the Yanchang Formation in the Ordos *** on detailed petrographic characterization,in-situ geochemical parameter testing,and high-resolution cycle analysis,the formation process of cyclical sedimentary records and related paleoenvironmental evolution are *** solar activity cycles were identified from the shales,namely the 360–500 yr,81–110 yr,and 30–57 yr cycles(cycles I,II,and III,respectively).Highfrequency paleoenvironmental evolution caused by solar activity induced lake-level fluctuation,which further controlled silty-grained sediment deposition and organic matter preservation in deep lake *** I controlled relatively long-term lake-level fluctuation,driving several pairs of SSFL and ORL deposition at the centimeter *** II and III were short-term cycles and acted on the millimeter to micrometer scale,further complicating the sedimentary strata forming during the period of lake-level fall induced by cycle *** cyclic deposition of SSFL and ORL correspond to cycle ***-level fluctuation influenced by cycle II mainly caused SSFL thickness variation in each lamina *** the period of lake-level rise induced by cycle I,periods of lake level rise

关键词： Triassic Lacustrine shales Solar activity Lake-level fluctuation Shale-oil exploration

Application of Te-Based Glass in Silicon Solar Cells

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Acta Metallurgica Sinica(English Letters) 2015年第2期28卷 223-229页

作者： xin-xin Pi xiu-Hua cao Zhen-xiao Fu Le Zhang Peng-De Han Li-xi Wang Qi-Tu Zhang College of Materials Science and Engineering Nanjing University of Technology Guangdong Fenghua Advanced Technology Company Limited

（90-x）TeO2-xZnO-lOBi203 （x = 15, 17.5, 20 and 22.5, in mol%） and 70TeOz-2OZnO-（10-y）Bi2O3-y Na2O （y = 1, 3, 5, 7, and 10, in mol%） glasses, and the corresponding Ag paste were prepared in order to prove that the Te-based glass frit could be applied to Ag pastes to fabricate Ag electrode. The relationship between structure and properties of the glasses was analyzed. The effects of glass frit on the microstructure, adhesion force, and resistivity of the Ag electrode were studied. The microstructure of Ag electrodes and the phase analysis of interface between Ag electrodes and the Si wafer were investigated using SEM and XRD. Finally, the 70TeO2-20ZnO-5Bi2O3-5Na2O glass showed better performance in the paste. What is more, Ag crystallites could be found on the Si wafer. These results suggested that the Te-based glass frit could react with SiNx anti-reflecting coating and Si to serve as a medium for forming Ag crystallites.

关键词： Solar cells Ag electrode Silver paste Tellurite glass Ag crystallites