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基于多线程消息框架的相控阵天线测试系统优化设计

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火控雷达技术 2024年第1期53卷 116-122页

作者：郑晓波吴文超贾守波徐立航王鹏飞王俊琪上海无线电设备研究所上海201109

相控阵天线测试是天线研制生产过程中必须的一个环节。为解决现有某型号相控阵天线方向图测试时间长的问题,根据测试方向图所处理指标要求、波控指令发送以及测量仪表数据采集特点,对测试方法、流程、时序进行重新合理设计,提出了一种... 详细信息

相控阵天线测试是天线研制生产过程中必须的一个环节。为解决现有某型号相控阵天线方向图测试时间长的问题,根据测试方向图所处理指标要求、波控指令发送以及测量仪表数据采集特点,对测试方法、流程、时序进行重新合理设计,提出了一种基于多线程消息框架的测试系统设计方法,得到了一套效率更高的相控阵天线测试系统。文中详细介绍了相控阵天线测试系统的硬件及功能、测试方法优化、系统软件中设计的各功能模块具体实现过程,对模块中的线程执行任务进行了说明。经实际生产使用验证,系统运行稳定、使用情况良好,方向图测试数据可靠、测试稳定性高、测试时间短,具有一定的应用参考意义。

关键词：相控阵天线多线程模块化测试系统优化消息

机器人辅助腹腔镜结合吲哚菁绿荧光显影技术在复杂性输尿管狭窄修复重建中的应用

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徐州医科大学学报 2024年第7期44卷 514-519页

作者：秦旭李港刘译文戚聂聂王军起李海龙卢猛徐州医科大学附属医院泌尿外科江苏徐州221002

目的评价机器人辅助腹腔镜结合吲哚菁绿荧光显影技术治疗复杂性输尿管狭窄的有效性和安全性。方法回顾性分析徐州医科大学附属医院2022年12月—2023年10月收治的13例复杂性输尿管狭窄患者的临床资料,所有患者均为内镜手术治疗结石后... 详细信息

目的评价机器人辅助腹腔镜结合吲哚菁绿荧光显影技术治疗复杂性输尿管狭窄的有效性和安全性。方法回顾性分析徐州医科大学附属医院2022年12月—2023年10月收治的13例复杂性输尿管狭窄患者的临床资料,所有患者均为内镜手术治疗结石后发生医源性输尿管狭窄,或输尿管狭窄手术治疗后再次发生狭窄。全部病例均经腹腔入路,吲哚菁绿溶液于术中通过肾造瘘管、输尿管支架或静脉通路注入患侧输尿管,利用彩色荧光模式辅助辨认输尿管狭窄段。6例行机器人辅助腹腔镜下输尿管狭窄段切除并端端吻合术,3例行机器人辅助腹腔镜下输尿管膀胱再植术,2例行机器人辅助腹腔镜下膀胱肌瓣输尿管成形术,1例行机器人辅助腹腔镜下舌黏膜输尿管成形术,1例行机器人辅助腹腔镜下输尿管阑尾补片修补术。结果 13例手术均成功完成,无术中和术后并发症,无中转开放手术,术中运用荧光显影技术,输尿管狭窄段及吻合端血运显影均良好,平均手术时间163(110~285)min,平均术中出血量40(20~110)mL,随访3~12个月,行腹部CT、静脉肾盂造影、彩超泌尿系检查,患者肾积水均明显减轻,无再狭窄发生。结论机器人辅助腹腔镜治疗复杂性输尿管狭窄安全有效,吲哚菁绿荧光显影技术有助于精准定位输尿管狭窄段,明确血运情况,从而有效缩短手术时间,该技术操作简便、安全,值得推广。

关键词：机器人辅助腹腔镜手术吲哚菁绿荧光显影技术输尿管狭窄重建预后

Langasite-based SAW high-temperature vibration sensor with temperature decoupling

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Science China(Technological Sciences) 2024年第6期67卷 1946-1956页

作者： ZHANG Juan CHENG WenHua wang Hao ZHANG Lei LI XiangRong MA HongShuai PANG junqi TAN QiuLin State Key Laboratory of Dynamic Measurement Technology North University of ChinaTaiyuan030051China Department of Mechanical Engineering Taiyuan Institute of TechnologyTaiyuan030008China

Monitoring high-temperature vibrations is critical in aerospace engineering,industrial manufacturing,and energy production,where harsh conditions necessitate robust vibration sensors for detecting anomalous ***,the accuracy of such sensors is often compromised by crosstalk between temperature and vibration *** study introduces a high-temperature vibration sensor based on langasite(LGS)surface acoustic wave(SAW)technology,designed to withstand temperatures up to 500℃.The sensor demonstrates high sensitivity,ranging from 12.54 kHz/g at 25℃ to 15.63 k Hz/g at 500℃.A comprehensive mechanical and electrical coupling model for the SAW vibration sensor was developed by integrating theoretical equations with numerical simulations to optimize the sensor's ***,a novel decoupling algorithm for temperature and vibration was established,achieving thermomechanical decoupling with precise vibration *** results indicated a maximum relative deviation of 4.67%for the *** conclusion,the proposed LGS SAW vibration sensor emerges as a promising solution for the accurate detection of multiple parameters in high-temperature vibration monitoring.

关键词： high temperature langasite(LGS) surface acoustic wave(SAW) piezoelectric vibration sensor temperature decoupling

Observer design and interval estimation of time-delay discrete-time linear systems with external disturbance and measurement noise

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Control Theory and Technology 2024年第1期22卷 69-80页

作者： junqi Yang Jianhao Xie Feiyang Liu School of Electrical Engineering and Automation Henan Key Laboratory of Intelligent Detection and Control of Coal Mine EquipmentHenan Polytechnic UniversityJiaozuo454003HenanChina

For a class of time-delay discrete-time linear systems with external disturbance and measurement noise, the interval estimation problems of state and measurement noise are investigated in this paper. First, the system state together with the time-delay term and measurement noise is augmented as a new state, and a singular system is then constructed. Subsequently, a kind of decoupling technique is employed to eliminate the effect of external disturbance, and an observer is designed to simultaneously estimate the system state and measurement noise. Based on the estimated state and measurement noise, the interval estimations of system state and measurement noise are obtained by reachability analysis technique. Finally, the effectiveness of the proposed method is verified by a four-tank liquid level system.

关键词： Interval estimation Time-delay system Observer design Reachability analysis

Compact prototype microfabricated gas chromatographic analyzer for autonomous determinations of VOC mixtures at typical workplace concentrations

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Microsystems & Nanoengineering 2018年第1期4卷 390-399页

作者： junqi wang Jonathan Bryant-Genevier Nicolas Nuñovero Chengyi Zhang Bruce Kraay Changhua Zhan Kee Scholten Robert Nidetz Sanketh Buggaveeti Edward T.Zellers Department of Chemistry University of MichiganAnn ArborMI 48109USA Department of Environmental Health Sciences University of MichiganAnn ArborMI 48109USA Applied Physics Program University of MichiganAnn ArborMI 48109USA Department of Mechanical Engineering University of MichiganAnn ArborMI 48109USA Center for Wireless Integrated MicroSensing and Systems University of MichiganAnn ArborMI 48109USA

This report concerns a benchtop prototype instrument containing a gas chromatographic microanalytical system(μGC)designed for the selective determination of multiple airborne volatile organic compounds(VOCs)at concentrations in the vicinity of recommended occupational exposure *** core microsystem consists of a set of discrete Si-microfabricated devices:a dualcavity,adsorbent-packed micro-preconcentrator-focuser(μPCF)chip that quantitatively captures and thermally desorbs/injects VOCs with vapor pressures between~0.03 and 13 kPa;tandem micro-column(μcolumn)chips with cross-linked PDMS wall-coated stationary phases capable of temperature-programmed separations;and an integrated array of fiveμchemiresistors(μCR)coated with different thiolate-monolayer protected gold nanoparticle(MPN)interface films that quantifies and further differentiates among the analytes by virtue of the response patterns *** key components include a pre-trap for low-volatility interferences,a split-flow injection valve,and an onboard He carrier–gas *** assembled unit measures 19×30×14 cm,weighs~3.5 kg,operates on AC power,and is laptop/LabVIEW ***-and system-level tests of performance demonstrated injection bandwidths o1 s,aμcolumn capacity of≥8μg injected mass,linear calibration curves,no humidity effects,excellent medium-term(that is,1 week)reproducibility,autonomous operation for 8 h,detection limits below Threshold Limit Values(TLV)for 10 mL air samples collected in 1 min,and response patterns that enhanced vapor *** determination of a 17-VOC mixture in the presence of seven interferences was performed in 4 *** augur well for adapting the microsystem to an all-MEMS wearableμGC currently under parallel development.

关键词： gas chromatography micro-GC microsystem mixtures sensor array VOCs

A Judgment of Attribution of Increase in Urine β_2-Microglobulin after Environmental Cadmium Exposure

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Biomedical and Environmental Sciences 1992年第2期5卷 130-135页

作者： CAI SHIWEN, wang JINGJING, XUE JINRONG, ZHU XUELI, wang junqi, wang YOUBINInstitute of Environmental Health and Engineering, Chinese Academy of Preventive Medicine, 29 Nan Wei Road, Beijing 100050, China Institute of Environmental Health and Engineering Chinese Academy of Preventive Medicine Beijing.

Urineβ_2-microglobulin (β_2-m) was measured in 433 persons with low-level, long-term environmental exposure to Cd, and in 124 control persons from unpolluted area. In 152 of the exposed persons, and some of the controls, the urine β-m exceeded the limit. Of the 433 exposed persons, 74 cases with both urine Cd and β_2-m exceeding the limit were matched by the control. This study suggests that after the stratification of the degrees of renal tubular injury according to the fractional β_2-m excretion (FE β_2-m) and coordination of clinical examination, FE β_2-m could contribute to identifying renal tubular dysfunction due to Cd exposure and kidney lesion when both Cd exposure and original nephropathy exist.

关键词： Microglobulin after Environmental Cadmium Exposure A Judgment of Attribution of Increase in Urine

基于膀胱癌二次电切术后病理灌注化疗方案的改良研究

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国际泌尿系统杂志 2024年第5期44卷 838-842页

作者：卢猛李震郭庆祥朱嘉伟王军起李海龙徐州医科大学附属医院泌尿外科徐州221002 徐州医科大学研究生院徐州221002

目的探讨继续首次经尿道膀胱肿瘤电切术(TURBT)后灌注与重新开始新一轮灌注周期对膀胱肿瘤二次电切术(re-TURBT)后病理结果中含有残余肿瘤成分的膀胱癌患者的治疗效果比较。方法回顾性分析2014年至2022年徐州医科大学附属医院就诊的82... 详细信息

目的探讨继续首次经尿道膀胱肿瘤电切术(TURBT)后灌注与重新开始新一轮灌注周期对膀胱肿瘤二次电切术(re-TURBT)后病理结果中含有残余肿瘤成分的膀胱癌患者的治疗效果比较。方法回顾性分析2014年至2022年徐州医科大学附属医院就诊的82例非肌层浸润性膀胱癌患者的临床资料。根据灌注方案的不同将患者分为重新灌注组(重新开始新一轮灌注化疗方案,47例)和继续灌注组(继续首次膀胱肿瘤电切术后灌注化疗,35例)。所有接受二次膀胱肿瘤电切术的患者每3个月进行一次膀胱镜检和影像学检查,分析两组患者的膀胱肿瘤的复发情况及影响因素。结果重新灌注组和继续灌注组的中位随访时间分别为68和44个月,复发率分别为15%和60%。Kaplan-Meier生存曲线结果显示,重新灌注组的无复发生存率(RFS)高于继续灌注组(P<0.001)。单因素Cox回归分析结果显示,BMI、灌注方案及膀胱肿瘤二次电切术后病理分期是膀胱癌复发的影响因素(均P<0.05)。多因素Cox回归分析结果显示,灌注方案及术后病理分期均是膀胱癌复发的重要危险因素(均P<0.05)。结论在二次电切病理结果中提示有肿瘤成分存在时,相比于继续首次电切术后灌注方案的患者,重新开始新一轮灌注化疗方案患者的RFS更高,且复发率更低,因此对于接受re-TURBT术后病理阳性的患者进行重新灌注周期可能有助于改善其预后。

关键词：膀胱肿瘤膀胱切除术灌注化疗

铝板表面无机与有机硅烷复合杂化膜的制备与性能

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材料保护 2024年第2期57卷 123-127页

作者：徐英男于海郭承鑫刘光政潘文波王军淇侯传金大连高佳化工有限公司辽宁大连116308 大连工业大学轻工与化学工程学院辽宁大连116034

为替代对环境污染严重的传统磷化和六价铬钝化技术,制备了一种由氨基硅树脂、聚氨酯树脂和无机金属组成的硅烷钝化液,将该钝化液涂布于脱脂后的铝板表面使其形成有机无机杂化膜。研究了钝化液pH值、氨基硅树脂的质量分数、聚氨酯树脂的... 详细信息

为替代对环境污染严重的传统磷化和六价铬钝化技术,制备了一种由氨基硅树脂、聚氨酯树脂和无机金属组成的硅烷钝化液,将该钝化液涂布于脱脂后的铝板表面使其形成有机无机杂化膜。研究了钝化液pH值、氨基硅树脂的质量分数、聚氨酯树脂的质量分数和无机金属离子Zn^(2+)、Mn^(2+)、Ni^(2+)和Ce^(3+)的种类对杂化膜耐腐蚀性能的影响,并用IR、SEM和TGA对杂化膜进行形貌和结构的表征,通过电化学实验测出不同条件下涂覆杂化膜的铝板的开路电位、EIS谱和Tafel极化曲线对杂化膜进行耐腐蚀性能表征。结果表明:pH值趋于4.5、氨基硅树脂质量分数占15.0%、聚氨酯树脂质量分数占10.0%、金属离子为1.5%Zn^(2+)时所得杂化膜耐腐蚀性能较好。

关键词：硅烷钝化液杂化膜氨基硅树脂聚氨酯树脂耐蚀性

Reversibly Cross-Linking Polyimide and Cyclophosphazene Toward Closed-Loop Recyclable Plastics with High Mechanical Strength,Excellent Flame Retardancy,and Chemical Resistance

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CCS Chemistry 2024年第4期6卷 976-987页

作者： Tingting Guan Xiaohan wang Xi Zhao Xingyuan Lu Xiu-Li wang Yu-Zhong wang junqi Sun State Key Laboratory of Supramolecular Structure and Materials College of ChemistryJilin UniversityChangchun 130012 The Collaborative Innovation Center for Eco-Friendly and Fire-Safety Polymeric Materials(MoE) National Engineering Laboratory of Eco-Friendly Polymeric Materials(Sichuan)State Key Laboratory of Polymer Materials EngineeringCollege of ChemistrySichuan UniversityChengdu 610064

Traditional flame-retardant plastics are technically difficult to chemically *** development of newtypes of flame-retardant plastics that are intrinsically capable of being closed-loop recycled and are sufficiently robust and stable to satisfy their practical application is urgently *** this study,closed-loop recyclable flame-retardant plastics with high mechanical strength and excellent chemical resistance are fabricated by cross-linking amino-terminated polyimide(PI-NH_(2))and aldehyde-terminated cyclophosphazene(CP-CHO)with imine *** resultant flame-retardant plastic,which is denoted as PI-CP,exhibits a tensile strength of∼115.6 MPa,Young’s modulus of∼2.5 GPa,and glass transition temperature of 316°*** the PI-CP plastic,the imine bonds are isolated within hydrophobic microenvironments generated by the rigid and hydrophobic polyimide chains and the benzene ring of *** a result,the PI-CP plastics are highly stable in highly acidic and basic aqueous solutions and other commonly used organic *** PI-CP plastic shows outstanding flame retardancy with a limiting oxygen index value of 48.8%.More importantly,the PI-CP plastic can be depolymerized to generate the original PI-NH_(2)and CPCHO monomers in high yields(∼97%)and *** recovered monomers can be used to refabricate the original plastics,establishing highly efficient polymer-monomer-polymer circulation and a sustainable plastics economy.

关键词： closed-loop recyclable plastics recyclable polymers reversibly cross-linked polymers flame retardancy supramolecular polymers