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Power optimization and performance improvement for embedded Ethernet SOC

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The Journal of China Universities of Posts and Teleco.munications 2008年第2期15卷 102-106页

作者： ZHENG Zhao-xia ZOU Lian-ying GAO Jun Research Center for VLSI and Systems Huazhong University of Science andTechnology Wuhan 430074 China School of Electric and information Engineering Wuhan Institute ofTechnology Wuhan 430074 China

Information appliance is the co.bination of traditional home appliances and the internet technology. In this article, an Ethernet co.troller system-on-chip （SOC） solution for information appliances is presented. To achieve high performance, the embedded 8 bits 8051 micro co.trol unit （MCU） is optimized by an independent instruction bus and a data bus. Besides, a two-stage pipeline feature is added. co.pared with the existing 8051 co.e, the enhanced one-cycle MCU offers ten times improvement in instruction execution efficiency. Meanwhile, the performance of media access co.trol （MAC） circuit is greatly improved by adopting various techniques such as direct memory access （DMA） co.trol, paging strategy, etc. To reduce the power co.sumption, clock gating, low power supply, and multi-working-clock are adopted. Moreover, to achieve rapid data co.munication in different clock frequency circuits, a simple ping-pong first in first out （FIFO） circuit is realized. The chip is implemented using TSMC 0.25 μm two-poly four-metal mixed signal co.plementary metal oxide semico.ductor （CMOS） technology. Its die area is 4.8 min× 4.6 mm. The test results show that the maximum throughput of Ethernet packets can reach 7 Mb/s while the power co.sumption is rather low-the working current is just about 200 mA.

关键词： low power technology hardware/software co.design,circular buffer throughput

A Preliminary Discussion on the Geochemical Role of co.ntry-rock media in Cassiterite-polymetallic Sulphide Mineralization,Dachang Ore Field,Guangxi,China

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Acta Geochimica 1988年第1期7卷 19-28页

作者：叶绪孙严云秀 Prospecting Team No.215 Guangxi Geological Exploration co.

Our metallogenic studies of the Dachang ore field show that the co.ntry-rock media have greatinfluence on the process of *** can not only co.tribute part of the ore-formingmaterial,but also have influence on the geochemical evolution of granitic magma and ore fluids,TheDachang ore field can be taken as a typical example to show the influence of co.ntry-rock media *** field investigations indicate that where granites nitruded weakly alkalicco.ntry rocks(*** Devonian limestones and silico.ites of platform facies in the Dachang),instead of carbonaceous shales of reducing basin facies,Sn would be able to enter rock-formingminerals in large quantities to form cassiterite-sulfide ore deposits of co.mercial ***,it may beco.cluded that the process of magmatic differentiation-evolution,mineralization and tectonic settingsof ore deposits are,more or less,co.trolled by their co.ntry-rock media.

关键词： A Preliminary Discussion on the Geochemical Role of co.ntry-rock media in Cassiterite-polymetallic Sulphide Mineralization,Dachang Ore Field,Guangxi,China rock

Thirty Years of Science,Technology,and Academia in Disaster Risk Reduction and Emerging Responsibilities

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International Journal of Disaster Risk Science 2020年第4期11卷 414-425页

作者： Rajib Shaw Graduate School of media and Governance Keio UniversityFujisawa 252-0882Japan

The 1990 initiation of the International Decade for Natural Disaster Reduction marked its 30th year in *** three decades since then have seen significant developments in science and technology and their inco.poration into the decision making in the field of disaster risk *** disasters that have occurred during that time have enhanced the importance of the field,and new research and innovations have *** article summarizes this evolution through the review of specific *** the Sendai Framework for Disaster Risk Reduction 2015–2030 provides opportunities for synergies with the sustainable development agenda,the science and technology co.munities have also changed their roles from advisory to co.designing and co.delivering *** education plays an important role in developing new generations of professionals,and the role of thematic incubation in higher education institutions is highlighted along with the development of the professional society in disaster risk *** evolution from Society 4.0(information age)to Society 5.0 will see an enhanced role of the technology-driven approach in disaster risk reduction,while traditional knowledge and indigenous technologies still remain valid for *** and science co.munities need to be more sensitive to changing the“last mile”co.cept to“first mile”thinking with respect to the users’needs and perspectives.

关键词： co.design solutions in disaster risk reduction Professional society Science and technology in disaster risk reduction Society 5.0

Enhancing oxide scale growth and adhesion via electrochemically regulating ion diffusion

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Journal of Materials Science & Technology 2023年第27期158卷 133-144页

作者： Peilin Wang Kaifa Du Huayi Yin Dihua Wang School of Resource and Environmental Sciences Hubei International Scientific and Technological Cooperation Base of Sustainable Resources and EnergyWuhan UniversityWuhan 430072China

Pre-oxidation is a co.mon surface treatment approach to enhance the co.rosion resistance of met-als,which suffers from slow ion diffusion kinetics,bad oxide scale adhesion,and weak ***,we propose an electrochemical oxidation approach in molten carbonate to improve the oxide scale growth and adhesion via electrochemically regulating ion diffusion in the formed oxide *** anodic polarization applied at the metal substrate enlarges the chemical potential gradient of oxygen and offers a favorable electric field across the metal/oxide interface to the oxide scale/molten salt interface,thereby speeding up the oxide scale growth rate in terms of increasing the diffusion rate of metal cations and oxygen ions through the oxide *** the same time,the oxide scale adhesion is remarkedly im-proved because the metal vacancies at the oxide/alloy interface are filled by the newly formed *** being treated by electrochemical oxidation,the co.rosion rate of the Ni-16Fe-4Mo alloys in molten Li_(2) co.(3)-Na_(2) co.(3)-K_(2) co.(3) decreased ***,electrochemical oxidation enables the rapid formation of an adherent and co.rosion-resistant oxide scale on the metal substrate,offering a general and effective way to fabricate co.rosion-resistant films to survive in various aggressively co.rosive media.

关键词： Molten salt High-temperature oxidation Anodic polarization co.rosion protection Inert anode

HDR-Net-Fusion:Real-time 3D dynamic scene reco.struction with a hierarchical deep reinforcement network

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co.putational Visual media 2021年第4期7卷 419-435页

作者： Hao-Xuan Song Jiahui Huang Yan-Pei Cao Tai-Jiang Mu BNRist Department of Computer Science and TechnologyTsinghua UniversityBeiing 100084China Kuaishou Technology co. Ltd.Beijing 100085China

Reco.structing dynamic scenes with co.modity depth cameras has many applications in co.puter graphics,co.puter vision,and ***,due to the presence of noise and erroneous observations from data capturing devices and the inherently ill-posed nature of non-rigid registration with insufficient information,traditional approaches often produce low-quality geometry with holes,bumps,and *** propose a novel 3D dynamic reco.struction system,named HDR-Net-Fusion,which learns to simultaneously reco.struct and refine the geometry on the fly with a sparse embedded deformation graph of surfels,using a hierarchical deep reinforcement(HDR)*** latter co.prises two parts:a global HDR-Net which rapidly detects local regions with large geometric errors,and a local HDR-Net serving as a local patch refinement operator to promptly co.plete and enhance such *** the global HDR-Net is formulated as a novel reinforcement learning problem to implicitly learn the region selection strategy with the goal of improving the overall reco.struction *** applicability and efficiency of our approach are demonstrated using a large-scale dynamic reco.struction *** method can reco.struct geometry with higher quality than traditional methods.

关键词： dynamic 3D scene reco.struction deep reinforcement learning point cloud co.pletion deep neural networks

Studies on plasma-activated perilla seed oil:Diagnosis,optimisation,and validation of reactive species

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High Voltage 2023年第4期8卷 841-851页

作者： Xiaolong Wang Jun Liu Quanxin Li Lian Li Shanrui Li Yunhan Ding Tong Zhao Ying Sun Yuantao Zhang School of Electrical Engineering Shandong UniversityJinanChina State Grid Hubei Electric Power co. Ltd.WuhanChina The Seco.d Hospital of Shandong University Shandong UniversityJinanChina Key Laboratory of Chemical Biology(Ministry of Education) Institute of Biochemical and Biotechnological DrugsSchool of Pharmaceutical SciencesCheeloo College of MedicineShandong UniversityJinanChina

Recently,the applications of co.d atmospheric plasma(CAP)in liquid treatment have attracted increasing attention owing to its excellent medical *** has been proved that CAP can effectively enhance the biological activity of vegetable oils due to the generation of reactive *** the reactor parameter is an important approach to regulate reactive species in plasma-activated oil to obtain better biological *** this study,a self-made jet array driven by a pulsed power supply was used to generate large-area plasma to irradiate perilla seed oil(PSO),with the formation of plasmaactivated perilla seed oil(PAPSO).By means of laser-induced fluorescence and chemical titration,the relative density of hydroxyl radical radical in plasma jet,as well as the activity of PAPSO were measured under different discharge parameters,and realised the co.trol of the activity of *** vitro experiments showed that PAPSO significantly enhanced its ability to inhibit cancer cells proliferation and induce apoptosis after plasma treatment,which provides a reference for cancer *** study is helpful to further understand the influence of plasma dose effect on the activity of media and provide guidance for related plasma medical applications.

关键词： reactive cancer radical

The Organic Rankine Cycle System Development for Heavy-Duty Diesel Engine

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The Organic Rankine Cycle System Development for Heavy-Duty ...

JNeRF:An efficient heterogeneous NeRF model zoo based on Jittor

2014中国汽车工程学会年会

作者： Dong Junqi Wang Jianzhang Zhang Rongyou Wang Bin Zhejiang Yinlun Machinery co. Ltd.

ISBN: (纸本)9783662450420

Based on the waste heat characteristic of the co.lant and exhaust gas in heavy duty diesel engine,the Organic Rankine Cycle（ORC） co.mercial product systems is *** waste heat source is the engine jacket water and exhaust gas,and the jacket water are used as the heat source media which is used to heat the evaporator of ORC *** working fluid is the R245 fa,and the plate type co.denser and evaporators are *** the ORC system and 200 kw engine,the expander and generator can bring the14.5kW electric energy in the nonnal working *** efficiency based on the First Law of Thermodynamics is 7.2%;and the co.pletely generating efficiency is 6.25%.

关键词： diesel engine Organic Rankine Cycle waste heat electricity generation

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co.putational Visual media 2023年第2期9卷 401-404页

作者： Guo-Wei Yang Zheng-Ning Liu Dong-Yang Li Hao-Yang Peng Department of co.puter Science and Technology Tsinghua UniversityBeijing 100084China Fitten Tech co. Ltd.Beijing 100084China

Neural radiance fields(NeRFs)for novel-view synthesis have attracted the attention of researchers in co.puter vision and *** traditional methods using explicit expressions,NeRFs represent a scene as an implicit neural radiance *** rendering,NeRF queries the co.or density at every position in the scene through a neural *** brings a wide range of possibilities for real-world 3D reco.struction and rendering,but problems remain to be *** works have improved NeRF’s sampling technique,position enco.ing method,network structure,etc.,but these improvements are difficult to be co.bined as the different modules are not well *** works have significantly sped up the co.e GPU co.putation of NeRF,leaving the deep learning framework as a major co.putational ***,it has been suggested to replace the frameworks by pure CUDA programs,but this limits maintainability and ***,we propose JNeRF,a unified,efficient,framework-friendly NeRF model zoo based on Jittor.

关键词： neural graphics rendering

Numerical simulation and optimization design of the EGR co.ler in vehicle

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2008年第9期9卷 1270-1276页

作者： Yu-qi HUANG Xiao-li YU Guo-dong LU Power Machinery and Vehicular Engineering Institute Zhejiang University Hangzhou 310027 China Zhejiang Yinlun Machinery co. Ltd. Tiantai 317200 China

The EGR (exhaust gas recirculation) technique can greatly reduce the NOx emission of diesel engines, especially when an EGR co.ler is employed. Numerical simulations are applied to study the flow field and temperature distributions inside the EGR co.ler. Three different models of EGR co.ler are investigated, among which model A is a traditional one, and models B and C are improved by adding a helical baffle in the co.ling area. In models B and C the entry directions of co.ling water are different, which mostly influences the flow resistance. The results show that the improved structures not only lengthen the flow path of the co.ling water, but also enhance the heat exchange rate between the co.l and hot media. In co.clusion we suggest that the improved structures are more powerful than the traditional one.

关键词： Exhaust gas recirculation (EGR) co.ler co.putational fluid dynamics (CFD) Shell-and-tube heat exchanger Helical baffle