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Dwell scheduling algorithm for multifunction phased array radars based on the scheduling gain

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Journal of Systems Engineering and Electronics 2008年第3期19卷 479-485页

作者： cheng Ting he Zishu tang Ting School of Electronic Engineering Univ. of Electronic Science and Technology Chengdu 610054 P. R. China

A real-time dwell scheduling model, which takes the time and energy constraints into account is founded from the viewpoint of scheduling gain. Scheduling design is turned into a nonlinear programming procedure. The real-time dwell scheduling algorithm based on the scheduling gain is presented with the help of two heuristic rules. The simulation results demonstrate that compared with the conventional adaptive scheduling method, the algorithm proposed not only increases the scheduling gain and the time utility but also decreases the task drop rate.

关键词： multifunction phased array radar dwell scheduling pulse interleaving time and energy constraint.

Comparison of acute pneumonia caused by SARS-CoV-2 and other respiratory viruses in children:a retrospective multi-center cohort study during COVID-19 outbreak

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Military Medical Research 2021年第4期8卷 468-480页

作者： Guang-Li Ren Xian-Feng Wang Jun Xu Jun Li Qiong Meng Guo-Qiang Xie Bo Huang Wei-Chun Zhu Jing Lin cheng-he tang Sheng Ye Zhuo Li Jie Zhu Zhen tang Ming-Xin Ma Cong Xie Ying-Wen Wu Chen-Xi Liu Fang Yang Yu-Zong Zhou Ying Zheng Shu-Ling Lan Jian-Feng Chen Feng Ye Yu he BenQing Wu Long Chen Si-Mao Fu cheng-Zhong Zheng Yuan Shi Department of Pediatrics General Hospital of Southern Theater Command of PLA111 Liuhua RoadYuexiu DistrictGuangzhou 510010GuangdongChina. Department of Pediatrics the Third People’s Hospital of ShenzhenShenzhen 518100GuangdongChina. Pediatric Intensive Care Unit Wuhan Children’s HospitalTongji Medical CollegeHuazhong University of Science&TechnologyWuhan 430010China. Pediatric Intensive Care Unit Maternal and Child Health Hospital of HuangshiHuangshi 435000HubeiChina. Department of Pediatrics the Second People’s Hospital of Guangdong ProvinceGuangzhou 510317China. Department of Pediatrics the Third Affiliated Hospital of Zunyi Medical University(the First People’s Hospital of Zunyi)Guizhou 563000China. Department of Pediatrics the Eighth People’s Hospital of GuangzhouGuangzhou 510440China. Department of Pediatrics the First Affiliated Hospital of Xinxiang Medical UniversityXinxiang 453100HenanChina. Pediatric Intensive Care Unit the Children’s Hospital Zhejiang University School of MedicineHangzhou 310000China. Department of Emergency/Critical Medicine Children’s Hospital of Nanjing Medical UniversityNanjing 210008China. Department of Pediatrics the Second Affiliated Hospital of Guangzhou Medical UniversityGuangzhou 510260China. Department of Medical information date room General Hospital of Southern Theater Command of PLAGuangzhou 510010China. Department of Pediatrics the First Affiliated Hospital of Jinan UniversityGuangzhou 510632China. Department of Pediatrics Maternal and Child Health Hospital of YangjiangYangjiang 529500GuangdongChina. Department of Pediatrics Shenzhen Hospital Affiliated to the University of Chinese Academy of SciencesShenzhen 518107GuangdongChina. Department of Pediatrics Nanfang Hospital of Southern Medical UniversityGuangzhou 510515China. Department of Pediatrics Zhujiang Hospital of Southern Medical UniversityGuangzhou 510280China. Department of Pediatrics Military Hospital of 74 Group of PLAGuangzhou 510318China. Department of Neonatology

Background:Until January 18,2021,coronavirus disease-2019(COVID-19)has infected more than 93 million individuals and has caused a certain degree of *** pneumonia caused by common viruses such as respiratory syncytial virus,rhinovirus,human metapneumovirus,human bocavirus,and parainfluenza viruses have been more common in ***,the incidence of COVID-19 in children was significantly lower than that in *** purpose of this study was to describe the clinical manifestations,treatment and outcomes of COVID-19 in children compared with those of other sources of viral pneumonia diagnosed during the COVID-19 ***:Children with COVID-19 and viral pneumonia admitted to 20 hospitals were enrolled in this retrospective multi-center cohort study.A total of 64 children with COVID-19 were defined as the COVID-19 cohort,of which 40 children who developed pneumonia were defined as the COVID-19 pneumonia *** 284 children with pneumonia caused by other viruses were defined as the viral pneumonia *** epidemiologic,clinical,and laboratory findings were compared by Kolmogorov-Smirnov test,t-test,Mann-Whitney U test and Contingency table *** usage,immunotherapy,blood transfusion,and need for oxygen support were collected as the treatment ***,intensive care needs and symptomatic duration were collected as the outcome ***:Compared with the viral pneumonia cohort,children in the COVID-19 cohort were mostly exposed to family members confirmed to have COVID-19(53/64 vs.23/284),were of older median age(6.3 years vs.3.2 years),and had a higher proportion of ground-glass opacity(GGO)on computed tomography(18/40 vs.0/38,Phe COVID-19 pneumonia cohort had a lower proportion of severe cases(1/40 vs.38/284,P=0.048),and lower cases with high fever(3/40 vs.167/284,Phe propor

关键词： Children Severe acute respiratory syndrome Coronavirus disease-2019 Viral pneumonia

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响应面法优化核桃青皮色素的羊毛染色工艺

毛纺科技 2017年第3期45卷 25-29页

作者：程茹严成何微唐周刚唐蜀智唐玲玲西南科技大学生命科学与工程学院四川绵阳621010 盐亭县金土地农业发展有限公司四川绵阳621010

在单因素预实验基础上,通过UV扫描图谱研究核桃青皮色素的热稳定性,采用响应面法进一步优化不同温度(80~100℃)、染液质量浓度(10~30 mg/m L)、时间(50~70 min)、p H值(3~5)下羊毛的染色工艺,以未染色羊毛为标准品,ΔE(总色差)为指标,... 详细信息

在单因素预实验基础上,通过UV扫描图谱研究核桃青皮色素的热稳定性,采用响应面法进一步优化不同温度(80~100℃)、染液质量浓度(10~30 mg/m L)、时间(50~70 min)、p H值(3~5)下羊毛的染色工艺,以未染色羊毛为标准品,ΔE(总色差)为指标,通过扫描电镜图对比分析羊毛染色前后形貌变化。结果表明:核桃青皮色素在100℃内热稳定性良好;优化的染色条件为p H值5,时间70 min,温度100℃,染液质量浓度13.20 mg/m L,此条件下,ΔE值为75.012,与模型预测值相符,对ΔE值而言,温度是影响它的最显著因素,时间和染液浓度交互作用极显著(P<0.01);扫描电镜图表明羊毛染色前后形貌未发生改变,实验结果可作为羊毛染色的最佳工艺。

关键词：核桃青皮色素羊毛响应面设计稳定性扫面电镜

Effects of isoproterenol on cardiac function in ovariectomized rats

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Effects of isoproterenol on cardiac function in ovariectomiz...

中国生理学会第23届全国会员代表大会暨生理学学术大会

作者： Qin WU,cheng-he tang,Chun-Ye QIAN Department of Physiology,Yancheng health Vocational and Technical College,Yancheng,China,224005

Objective To investigate the effects of different dose isoproterenol(ISO) on cardiac function in ovariectomized *** Ninety health female Sprague-Dawley rats were randomly divided into normal control group (Control),sham operation group(Sham) and bilateral ovariectomy group(Ovx).Four weeks later,the rat hearts were quickly removed,mounted on Langendorff apparatus,and perfused with Krebs-henseleit(K-H) solution.A computer-based electrophysiological recorder system was used to measure changes of maximal rate of the pressure increase in systole phase(+dp/dt),maximal rate of the pressure decrease in diastole phase(-dp/dt), mean arterial blood pressure(MAP),left ventricular end diastolic pressure(LVEDP) and left ventricular developed pressure(LVDP).Then,Cardiomyocytes from these hearts were isolated through 5 min of Ca-free buffer perfusion and 25 min of collagenase *** ventricles were chopped and *** cardiomyocytes were resuspended in KB *** cardiomyocytes shortening amplitude were evaluated including basal and ISO stimulation *** some ventricular myocytes from every group rats had incubated with ISO at 5μmol/L for 2 hours,the viability of cardiomyocytes were *** test effects of chronicβ-adrenergic stimulation following estrogen depletion,mortality rate curves were examined after chronic treatment with ISO(5 mg/kg per day,28 days) in every *** Ovx promoted body weight gain associated with reduced serum estrogen and uterine weight,but had no effects on MAP,LVEDP,LVDP and±dp/*** increased both basal and ISO stimulation *** increased the myocellular shortening amplitude in a concentration-dependent manner and 100 nmol/L of the drug exerted a maximal *** myocellular ISO-elicited change in contraction was significantly higher from Ovx rats than from Control and Sham ***-elicited changes in contraction were higher than the basal contraction in every *** viability of cardiomyocyte

关键词： Isoproterenol Ovariectomy Cardiac function

来源： cnki会议评论

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论人力资本产权

四川大学学报（哲学社会科学版） 2000年第3期 5-12页

作者：何承金唐志红四川大学管理学院四川大学经济学院四川成都610064

人力资本和物质资本一样存在产权问题。忽略人力资本产权及有关问题是我们改革中存在的一个失误。人力资本产权是一个由所有权、经营权、收益权、发展权等一系列权利组成的产权束，所有权是其他一切权利的基础，经营权是核心，收益权是... 详细信息

人力资本和物质资本一样存在产权问题。忽略人力资本产权及有关问题是我们改革中存在的一个失误。人力资本产权是一个由所有权、经营权、收益权、发展权等一系列权利组成的产权束，所有权是其他一切权利的基础，经营权是核心，收益权是要害。

关键词：人力资本产权所有权经营权收益权企业

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混合动力汽车真彩液晶数字仪表软件设计

上海交通大学学报 2008年第7期42卷 1081-1084页

作者：曹成昆何彬唐航波冒晓建上海交通大学汽车电子技术研究所上海200240

设计了混合动力汽车真彩液晶(LCD)数字仪表的软件流程.该仪表系统具有仪表显示、故障诊断显示、车辆行驶参数记录与分析、数据保存与回放等功能,实现了汽车仪表的数字化与智能化.该数字仪表经扩充后兼具整车管理系统、行驶记录仪、信息... 详细信息

设计了混合动力汽车真彩液晶(LCD)数字仪表的软件流程.该仪表系统具有仪表显示、故障诊断显示、车辆行驶参数记录与分析、数据保存与回放等功能,实现了汽车仪表的数字化与智能化.该数字仪表经扩充后兼具整车管理系统、行驶记录仪、信息媒体播放器等功能.

关键词：混合动力汽车控制局域网总线液晶显示数字仪表

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城际铁路土工格栅加筋土挡墙变形数值模拟

石家庄职业技术学院学报 2020年第6期32卷 7-12页

作者：沈立森程和堂齐兴敏石家庄职业技术学院建筑工程系河北石家庄050081 中国铁路南昌局集团有限公司鹰潭工务段江西南昌335000 河北轨道运输职业技术学院机电工程系河北石家庄052165

结合青荣线城际铁路工程实际,简述了土工格栅的3种特性和加筋土挡墙的4种破坏形式,选取典型断面,借用有限元软件建立了有限元模型;揭示了加筋土挡墙的变形规律,即挡墙最大沉降点位于中上部,最大水平位移点位于挡墙面板附近.分析了不同... 详细信息

结合青荣线城际铁路工程实际,简述了土工格栅的3种特性和加筋土挡墙的4种破坏形式,选取典型断面,借用有限元软件建立了有限元模型;揭示了加筋土挡墙的变形规律,即挡墙最大沉降点位于中上部,最大水平位移点位于挡墙面板附近.分析了不同加筋间距与挡墙变形的关系,即加筋间距不超过0.6 m时,水平位移量随间距增大而增大,竖向沉降不变;当间距超过0.6 m时.水平位移量迅速增大,竖向沉降也有所增大.阐明了不同墙顶荷载作用下潜在破裂面的分布规律,即随墙顶荷载的增大,破裂面逐渐偏离面板.

关键词：城际铁路土工格栅加筋土挡墙有限元潜在破裂面

A novel flexible nerve guidance conduit promotes nerve regeneration while providing excellent mechanical properties

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Neural Regeneration Research 2025年第7期20卷 2084-2094页

作者： Tong Li Quhan cheng Jingai Zhang Boxin Liu Yu Shi Haoxue Wang Lijie Huang Su Zhang Ruixin Zhang Song Wang Guangxu Lu Peifu tang Zhongyang Liu Kai Wang Department of Orthopedics the Fourth Medical Center of Chinese PLA General HospitalBeijingChina Department of Training and Sports Medicine Characteristic Medical Center of Chinese People’s Armed Police ForceTianjinChina Medical School of Chinese PLA BeijingChina Key Laboratory of Bioactive Materials for the Ministry of Education College of Life SciencesNankai UniversityTianjinChina Department of Orthopedics Tianjin HospitalTianjinChina Department of Rehabilitation Medicine Er Quan Hospital of PAPWuxiJiangsu ProvinceChina

Autografting is the gold standard for surgical repair of nerve defects>5 mm in length;however,autografting is associated with potential complications at the nerve donor *** an alternative,nerve guidance conduits may be *** ideal conduit should be flexible,resistant to kinks and lumen collapse,and provide physical cues to guide nerve *** designed a novel flexible conduit using electrospinning technology to create fibers on the innermost surface of the nerve guidance conduit and employed melt spinning to align ***,we prepared disordered electrospun fibers outside the aligned fibers and helical melt-spun fibers on the outer wall of the electrospun fiber *** presence of aligned fibers on the inner surface can promote the extension of nerve cells along the *** helical melt-spun fibers on the outer surface can enhance resistance to kinking and compression and provide *** novel conduit promoted nerve regeneration and functional recovery in a rat sciatic nerve defect model,suggesting that it has potential for clinical use in human nerve injuries.

关键词： aligned fibers anti-kinking helical fibers nerve guidance conduit nerve regeneration peripheral nerve injury topological guidance

Microstructure Transformation and Refinement Mechanism of Undercooled Cu-Ni-Co Alloy Based on Simulation of Critical Cutting Speed in Ultrasonic Machining

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Journal of Wuhan University of Technology(Materials Science) 2023年第6期38卷 1472-1483页

作者： he Xiaoyu HOU Kai XU Xuguang tang cheng ZHU Xijing School of Mechanical Engineering North University of ChinaTaiyuan 030051China

Both Cu60Ni38Co2 and Cu60Ni40 alloy were naturally cooled after rapid solidification from the liquid *** transformation law of the microstructure characteristics of the rapidly solidified alloy with the change of undercooling(ΔT)was systematically *** is found that the two alloys experience the same transformation *** refinement structures under different undercoolings were characterized by electron backscatter diffraction(EBSD).The results show that the characteristics of the refinement structure of the two alloys with low undercooling are the same,but the characteristics of the refinement structure with high undercooling are *** transmission electron microscopy(TEM)results of Cu60Ni38Co2 alloy show that the dislocation network density of low undercooled microstructure is lower than that of high undercooled *** combining EBSD and TEM,it could be confirmed that the dendrite remelting fracture is the reason for the refinement of the low undercooled structure,while the high undercooled structure is refined due to *** this basis,in the processing of copper base alloys,there will be serious work hardening phenomenon and machining hard problem of consciousness problems caused by excessive cutting force.A twodimensional orthogonal turning finite element model was established using ABAQUS software to analyze the changes in cutting speed and tool trajectory in copper based alloy ultrasonic elliptical vibration *** results show that in copper based alloy ultrasonic elliptical vibration turning,cutting process parameters have a significant impact on cutting *** reasonable process parameters can effectively reduce cutting force and improve machining quality.

关键词： rapid solidification undercooling microstructure refinement structure ultrasonic elliptical vibration turning cutting speed finite element analysis