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无线网络中基于流媒体传输的自适应TFRC机制

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计算机系统应用 2013年第7期22卷 161-167页

作者：王万良张小玮姚信威岑跃峰浙江工业大学信息工程学院杭州310023

在无线网络高误码率的环境下,经典TFRC机制会将无线误码丢包误认为拥塞丢包,导致吞吐量过度降低.针对无线网络实时流媒体业务的传输控制问题,提出了一种改进型动态自适应TFRC机制(Adaptive-TFRC).它在接收端利用丢包区分参数来真实反映... 详细信息

在无线网络高误码率的环境下,经典TFRC机制会将无线误码丢包误认为拥塞丢包,导致吞吐量过度降低.针对无线网络实时流媒体业务的传输控制问题,提出了一种改进型动态自适应TFRC机制(Adaptive-TFRC).它在接收端利用丢包区分参数来真实反映网络的状态(即拥塞或者误码),然后反馈至发送端,同时对经典TFRC机制的吞吐量模型公式进行改进,最终能够根据实时网络条件动态自适应地调节传输速率.仿真结果表明,Adaptive-TFRC机制能够有效地提高网络吞吐量,降低实时业务流的延时抖动,同时能够进一步改善TCP业务的友好性传输,从而保证无线网络实时流媒体的服务质量.

关键词： TFRC机制单向传输时延 Adaptive-TFRC 无线网络流媒体

Poorly controlled type II diabetes mellitus significantly enhances postoperative chemoresistance in patients with stage III colon cancer

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World Journal of Gastroenterology 2025年第3期31卷 29-41页

作者： Ruo-Yu Guan Jia-wei Wu Zi-Yun Yuan Zhi-Yuan Liu Zi-Zhu Liu Zhi-Cong Xiao Jing-Hui Li Cheng-Zhi Huang Jun-Jiang Wang Xue-Qing yao Guangdong Cardiovascular Institute Guangdong Provincial People’s HospitalGuangdong Academy of Medical SciencesSouthern Medical UniversityGuangzhou 510080Guangdong ProvinceChina Department of Gastrointestinal Surgery Department of General SurgeryGuangdong Provincial People’s Hospital(Guangdong Academy of Medical Sciences)Southern Medical UniversityGuangzhou 510080Guangdong ProvinceChina Department of General Surgery Guangdong Provincial People’s Hospital Ganzhou Hospital(Ganzhou Municipal Hospital)Ganzhou 341000Jiangxi ProvinceChina Shantou University Medical College Shantou 515041Guangdong ProvinceChina School of Medicine South China University of TechnologyGuangzhou 510006Guangdong ProvinceChina Gannan Medical University Ganzhou 341000Jiangxi ProvinceChina

BACKGROUND Type II diabetes mellitus(T2DM)has been associated with increased risk of colon cancer(CC)and worse prognosis in patients with *** effects of T2DM on postoperative chemoresistance rate(CRR)and long-term disease-free survival(DFS)and overall survival(OS)in patients with stage III CC who receive curative resection remain *** To investigate whether T2DM or glycemic control is associated with worse postoperative survival outcomes in stage III *** This retrospective cohort study included 278 patients aged 40-75 years who underwent surgery for stage III CC from 2018 to *** on preoperative T2DM history,the patients were categorized into non-DM(n=160)and DM groups(n=118).The latter was further divided into well-controlled(n=73)and poorly controlled(n=45)groups depending on the status of glycemic ***,OS,and CRR were compared between the groups and Cox regression analysis was used to identify risk *** Patients in the DM and non-DM groups demonstrated similar DFS,OS,and CRR(DFS:72.03%vs 78.75%,P=0.178;OS:81.36%vs 83.12%,P=0.638;CRR:14.41%vs 7.5%,P=0.063).Poorly controlled DM was associated with a significantly worse prognosis and higher CRR than well-controlled DM(DFS:62.22%vs 78.07%,P=0.021;OS:71.11%vs 87.67%,P=0.011;CRR:24.40%vs 8.22%,P=0.015).High preoperative fasting plasma glucose[DFS:Hazard ratio(HR)=2.684,P<0.001;OS:HR=2.105,P=0.019;CRR:HR=2.214,P=0.005]and glycosylated hemoglobin levels(DFS:HR=2.344,P=0.006;OS:HR=2.119,P=0.021;CRR:HR=2.449,P=0.009)indicated significantly poor prognosis and high CRR,while T2DM history did not(DFS:HR=1.178,P=0.327;OS:HR=0.933,P=0.739;CRR:HR=0.997,P=0.581).CONCLUSION Increased preoperative fasting plasma glucose and glycosylated hemoglobin levels,but not T2DM history,were identified as risk factors associated with poor postoperative outcomes and high CRR in patients with stage III CC.

关键词： Colon cancer Chemoresistance Diabetes mellitus Prognosis Type II diabetes mellitus

Supercritical carbon dioxide as a new working medium for pneumatic launch:A theoretical study

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Defence Technology（防务技术） 2021年第4期17卷 1296-1306页

作者： Hong-xin yao Xue-zhong wei Hong Ye Department of Thermal Science and Energy Engineering University of Science and Technology of ChinaHefei230027People’s Republic of China

Compared with the conventionally gaseous or liquid working media,the specific internal energy of supercritical carbon dioxide(SCD)is higher at the same temperature and pressure,and the critical temperature of carbon dioxide is close to room temperature,making SCD a potential new working medium for pneumatic *** analyze the feasibility of this conception,an analytical model of a pneumatic catapult is established on basis of the conservations of mass and *** model consists of a high-pressure chamber and a low-pressure chamber connected by multiple valves,and there is a movable piston in the low-pressure chamber that can push an aircraft to *** effects of the launch readiness state of SCD in the high-pressure chamber,the initial volume of the low-pressure chamber and the valve control on the movement of the aircraft are *** is found that there is a restrictive relation between the temperature and pressure of the launch readiness state of SCD,i.e.,there is a maximum allowable launch readiness pressure when the launch readiness temperature is *** this restrictive relation is not satisfied,the working medium in the low-pressure chamber will drop to its triple point within a few milliseconds,leading to a launch *** to this restrictive relation,there is an optimal launch readiness state of SCD with the highest working capacity for any allowable launch readiness *** pressure of the low-pressure chamber will decrease significantly as the initial volume increases,leading to a decreased acceleration of the *** acceleration can be controlled below a critical value by a designed sequential blasting technique of multiple *** calculated results show that a 500 kg aircraft can be accelerated from 0 to 58 m/s in 0.9 s with 36 kg of carbon *** research provides a new technique for the controllable cold launch of an aircraft.

关键词： Pneumatic launch Supercritical carbon dioxide Restrictive relation of the launch readiness state Optimal launch readiness state High working capacity

Selection Method for New Energy Output Guaranteed Rates Considering Optimal Energy Storage Configuration

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CSEE Journal of Power and Energy Systems 2024年第2期10卷 539-547页

作者： xin Cheng Tong Wu wei yao Yan Yang Guangdong Power Grid Corporation Guangzhou 510620China State Key Laboratory of Advanced Electromagnetic Engineering and Technology and School of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuhan 430074China

The output of new energy represented by wind power and photovoltaic power features volatility and randomness. It is a practical approach to use the guaranteed rate with statistical characteristics to analyze the output coefficient of new energy. However, there is a lack of analysis and demonstration on the value of the new energy output guaranteed rate. To solve this problem, a selection method for the new energy output guaranteed rate considering optimal energy storage configuration is proposed. First, the influence of the new energy output guaranteed rate on the new energy output coefficient is analyzed. Secondly, with the goal of minimizing the comprehensive costs, an optimal configuration model of energy storage based on the output guaranteed rate of new energy is constructed, and particle swarm optimization is used for the optimization solution. Then, according to the optimal energy storage configuration results under different guaranteed rates, a reasonable new energy output guaranteed rate is determined by maximizing the comprehensive benefits obtained from energy storage. Finally, an example applied to the power grid in an area of Guangdong in Southern China is provided to illustrate the effectiveness of the proposed method.

关键词： Energystorage optimization guaranteed output guaranteed rate new energy consumption

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成都金沙遗址钢结构制作安装关键工序控制

施工技术 2006年第3期35卷 73-74页

作者：郭广荣孙晋一杨学俭李广云姚新伟山西汾阳市建筑金属结构有限公司山西汾阳032200

成都金沙遗址大棚钢结构工程为圆钢管相贯节点桁架结构,环桁架弦杆为不规则空间曲线,通过采取弯管与胎具双重控制的方法,使环桁架尺寸得到精确控制;由于施工条件限制,采取了钢丝绳加固、结合已有结构辅助的方法将平面桁架移动到指定位置。

关键词：钢结构相贯节点制作安装滑移法

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基于决策树的HEVC编码单元划分算法

计算机科学 2016年第4期43卷 308-312页

作者：岑跃峰王万良姚信威王超超潘铁强浙江工业大学计算机科学与技术学院杭州310023 衢州学院电气与信息工程学院衢州324000

为了有效降低高效视频编码标准HEVC编码过程中的计算复杂度,提出了一种基于决策树的编码单元划分算法。该算法将编码单元划分问题归为分类问题,提取编码单元的划分信息到决策树模型中进行学习,得到决策树分类器。利用分类器对满足分类... 详细信息

为了有效降低高效视频编码标准HEVC编码过程中的计算复杂度,提出了一种基于决策树的编码单元划分算法。该算法将编码单元划分问题归为分类问题,提取编码单元的划分信息到决策树模型中进行学习,得到决策树分类器。利用分类器对满足分类条件的编码单元进行划分,跳过了率失真计算,从而降低了视频编码的计算复杂度。实验结果表明,本算法在保证视频质量的同时有效降低了编码计算复杂度。

关键词： HEVC 计算复杂度决策树率失真信噪比

金川镍矿尾砂膏体充填系统工艺技术改造与应用研究

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有色金属科学与工程 2014年第2期5卷 1-9页

作者：杨志强王永前高谦陈得信姚维信北京科技大学金属矿山高效开采与安全教育部重点实验室北京100083 金川集团股份有限公司甘肃金昌737100

膏体充填技术是目前最先进和技术难度最大的充填采矿技术之一.从20世纪80年代末期到90年代中,金川矿山首次开展了尾砂膏体充填技术的引进、研究、系统建设和工业化应用研究.由于膏体充填技术在我国首次应用,因此在设计和工程应用中存在... 详细信息

膏体充填技术是目前最先进和技术难度最大的充填采矿技术之一.从20世纪80年代末期到90年代中,金川矿山首次开展了尾砂膏体充填技术的引进、研究、系统建设和工业化应用研究.由于膏体充填技术在我国首次应用,因此在设计和工程应用中存在很多问题,导致膏体充填系统投产6年来一直处于非常生产状态.虽然开展了不间断研究和技术改造,但一直未取得突破性进展.针对在生产中暴露出的问题以及总结前期研究经验,从2005年4月开展了为期1年多的膏体充填技术攻关和系统改造,由此获得重大成果.改造后的膏体充填系统实现了正常生产,充填生产能力逐年提高,从2006年充填9万m3到2011年达到20万m3,达到了设计生产能力,解决了长期困扰尾砂膏体充填中的技术难题.文中首先简要概述我国目前膏体充填矿山应用现状,然后重点总结金川矿山尾砂膏体充填技术研究进展以及所取得的技术攻关成果.在此基础上,最后展望了金川矿山充填采矿技术的发展趋势.

关键词：金川镍矿尾砂膏体充填工艺技术改造工程应用

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金川镍矿尾砂膏体充填采矿技术进步与展望

徐州工程学院学报（自然科学版） 2014年第3期29卷 1-8页

作者：杨志强高谦王永前姚维信陈得信北京科技大学金属矿山高效开采与安全教育部重点实验室北京100083 金川集团股份有限公司甘肃金昌737100

膏体充填是充填法采矿中技术最先进和难度最大的采矿技术.从20世纪80年代末期到90年代中期,金川矿山在我国首次开展了尾砂膏体充填技术的引进、研究、建设和工业化应用.由于膏体充填在我国尚属首次,因此在系统设计和工程应用中存在诸多... 详细信息

膏体充填是充填法采矿中技术最先进和难度最大的采矿技术.从20世纪80年代末期到90年代中期,金川矿山在我国首次开展了尾砂膏体充填技术的引进、研究、建设和工业化应用.由于膏体充填在我国尚属首次,因此在系统设计和工程应用中存在诸多问题,导致膏体充填系统于1999年投产6年来一直处于非正常生产状态.虽然矿山开展了不间断研究和技术改造,但一直未取得突破性进展.针对在生产中暴露出的问题以及前期研究经验,从2005年4月开展为期1年多的膏体充填技术攻关和系统改造,由此获得重大突破.改造后的膏体充填系统不仅实现正常生产,充填生产能力逐年提高,而且在2011年达到设计生产能力,从而解决了长期困扰尾砂膏体充填的技术难题.首先简要概述我国目前尾砂膏体充填技术应用现状,然后重点总结金川矿山尾砂膏体充填技术研究进展以及所取得的攻关成果,展望金川矿山充填采矿技术的发展趋势.

关键词：金川矿山膏体充填研究进展技术改造发展展望

Evaporate prediction and compensation of intake port wall-wetting fuel film for spark ignition engines fueled with ethanol-gasoline blends

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2012年第8期13卷 610-619页

作者： Dong-wei yao xin-chen LING Feng WU Institute of Power Machinery and Vehicular Engineering Zhejiang UniversityHangzhou 310027China

The fuel dynamic transfer process,including fuel injection,fuel film deposition and evaporation in the intake port,was analyzed for spark ignition(SI) engines with port fuel injection(PFI).The influence of wall-wetting fuel film,especially its evaporation rate,upon the air-fuel ratio of in-cylinder mixtures was also *** to the similarity principle,Fick's law,the ideal gas equation and the Gilliland correlation,an evaporate prediction model of wall-wetting fuel film was set up and an evaporate prediction based dynamic fuel film compensator was *** engine cold start tests,the wall-wetting temperature,which is the key input of the fuel film evaporate prediction model,was also modeled and *** with the experimental data of the evaporation characteristics of ethanol-gasoline blends and engine calibration tests,all the parameters of the wall-wetting fuel film evaporate prediction model used in the fuel film compensator were ***-wave disturbance tests of fuel injection showed that with the help of the fuel film compensator the response of the in-cylinder air-fuel ratio was significantly improved and the real air-fuel ratio always closely matched the expected *** fuel film compensator was then integrated into the final air-fuel ratio controller,and the engine tests showed that the air-fuel ratio control error was less than 2% in steady-state conditions,and less than 4% in transient *** fuel film compensator also showed good adaptability to different ethanol-gasoline blends.

关键词： Spark ignition (SI) engine Ethanol-gasoline blend Wall-wetting effect Evaporate prediction Fuel film compensation