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基于改进SHRP融冰试验的氯盐融雪剂性能研究

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中外公路 2024年第3期44卷 262-269页

作者：吕悦晶党博张志伟汤文樊宇武汉科技大学汽车与交通工程学院湖北武汉430065 青海省公路局青海西宁810001

氯盐融雪剂因其融冰除雪性能优异、价格低廉、易于获取而得到广泛应用。为探究氯盐融雪剂的温度适用性不同、标准不统一、撒布方式粗略等问题,该文通过改进的SHRP融冰试验,分析了温度、固液态及撒布方式对NaCl、CaCl_(2)、MgCl_(2) 3种... 详细信息

氯盐融雪剂因其融冰除雪性能优异、价格低廉、易于获取而得到广泛应用。为探究氯盐融雪剂的温度适用性不同、标准不统一、撒布方式粗略等问题,该文通过改进的SHRP融冰试验,分析了温度、固液态及撒布方式对NaCl、CaCl_(2)、MgCl_(2) 3种常用氯盐融雪剂除冰性能的影响。试验结果表明:氯盐融雪剂的除冰性能对温度具有显著的敏感性;MgCl_(2)、CaCl_(2)两种融雪剂在融化过程中存在“放热”效应;同种氯盐融雪剂在固态下的融冰效率高于液态下的;同种氯盐融雪剂在不同撒布方式下融冰效率不同,其中,在线性撒布下除冰能力最强。根据试验结果,建议使用固态线性撒布的方式,并根据环境温度选择适宜的融雪剂。

关键词：融冰除雪氯盐融雪剂 SHRP融冰试验撒布方式

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海上风电场中的远程集成监控系统设计

电子技术（上海） 2024年第4期53卷 56-57页

作者：张智伟黄琛杨武炳杨金宝上海海湾新能风力发电有限公司上海202156 江苏金风科技有限公司江苏224100 北京金风慧能技术有限公司北京102600

阐述结合海上风电场系统现状和基本需求,设计一种海上风电场远程集成监控系统。系统采用B/S体系架构,通过信息交换模型协调OPC-UA映射方式实现对海上风电场信息的实时获取,系统通信中选择使用GPRS技术为设备提供收发功能。

关键词：远程监控通信网络海上风电场

Analytical solution for longitudinal deformation of shield tunnel induced by overcrossing tunnelling considering circumferential joints

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Journal of Rock Mechanics and Geotechnical Engineering 2023年第9期15卷 2355-2374页

作者： zhiwei zhang Rongzhu Liang Zhongchao Li Cheng Kang MHEl Naggar Mingzhao Xiao Wenbing Wu Faculty of Engineering China University of GeosciencesWuhan430074China Wuhan Municipal Construction Group Co. Ltd.Wuhan340023China Geotechnical Research Centre Faculty of EngineeringThe University of Western OntarioLondonONN6A 5B9Canada

This paper presents a new analytical solution for assessing the longitudinal deformation of shield tunnel associated with overcrossing tunnelling in consideration of circumferential joints.A simplified longitudinal beam-spring model(SLBSM)is established to model the longitudinal behaviours of shield tunnel,which can consider the opening and dislocation between segmental rings ***,the existing tunnel is treated as the SLBSM resting on the elastic *** state equations including tunnel displacements and internal forces are constructed to solve the discontinuous deformation of circumferential joint-segmental *** feasibility of the proposed solution is verified through three well-documented *** predictions from the proposed method are also compared with other analytical *** is found that the proposed method can well capture the deformation of tunnel segmental rings and joints,where the rigid displacement mainly occurs in the segmental rings while the rotation and dislocation occur in the circumferential *** dominant parameters are also analysed to explore the effects on existing tunnel deformation,including the rotation stiffness and shearing stiffness of joints,the skew angle and the clearance between new and old tunnels.

关键词： Overcrossing tunnelling Shield tunnel Circumferential joints Longitudinal beam-spring model(LBSM) Opening Dislocation

Potential biomarkers predicting risk of pulmonary hypertension in congenital heart disease： the role of homocysteine and hydrogen sulfide

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Chinese Medical Journal 2014年第5期127卷 893-899页

作者： Sun Ling Sun Shuo Li Yufen Pan Wei Xie Yumei Wang Shushui zhang zhiwei Southern Medical University Guangzhou Guangdong 510080 China Department of Cardiac Pediatrics Guangdong General Hospital Guangdong Academy of Medical Sciences Guangzhou Guangdong 510080 China

Background Pulmonary hypertension （PH） is a common complication of congenital heart disease （CHD）.Although risk stratification is vital for prognosis and therapeutic guidance,the need for understanding the role of novel biomarkers cannot be *** aim of the present study was to investigate the changes of homocysteine and hydrogen sulfide levels and find potential biomarkers for early detection and *** Between September 2012 and April 2013,we prospectively collected data on 158 pediatric patients with left to right shunt CHD at our *** right heart catheterizations were performed in all ***-seven cases were associated with *** levels of homocysteine and hydrogen sulfide were detected with fluorescence polarization immunoassay and a sensitive silver-sulphur electrode,***-linked immunosorbent assay was used to determine the expression of methylenetetrahydrofolate reductase （MTHFR）,cystathionine β-synthase （CBS）,and cystathionine gamma-lyase （CSE）.Radioimmunoassays were used to obtain folic acid and vitamin B12 *** The difference in the levels of homocysteine,folic acid,vitamin B12,hydrogen sulfide,as well as the MTHFR and CSE expression between patients with PH and without PH were statistically significant （all P ＜0.05）.Homocysteine had the best sensitivity and specificity to predict PH （P ＜0.001）.Subgroup analysis showed that the levels of homocysteine and hydrogen sulfide,and the expression of CSE and MTHFR between patients with dynamic and obstructive PH were significantly different （all P ＜0.05）.Based on the ROC curve,homocysteine had the best sensitivity and specificity to predict obstructive PH （P=0.032）,while CSE had the most significant sensitivity and specificity to predict the dynamic PH （P=0.008）.Conclusions Increased levels of homocysteine and decreased levels of hydrogen sulfide were significantly negatively correlated in PH associated with *** underlying mechanism involved

关键词： congenital heart disease pulmonary hypertension children homocysteine hydrogen sulfide biomarkers

Application of surfactant for improving leaching process of weathered crust elution-deposited rare earth ores

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Journal of Rare Earths 2024年第1期42卷 181-190,I0007页

作者： Fang Zhou Lisen zhang zhiwei Wang Yixin zhang Ru'an Chi Xiaoyan Wu Key Laboratory for Green Chemical Process of Ministry of Education Wuhan Institute of TechnologyWuhan430073China

Weathered crust elution-deposited rare earth ores(WREOs)in China are the main source of medium and heavy rare earths in the *** order to improve the seepage and the mass transfer of traditional ammonium salt leaching process of WREOs,surfactants were added in the ammonium sulfate leaching solution and the ammonium chloride leaching *** leaching kinetics,the mass transfer process,and the adhesion work reduction factor calculated from the interfacial properties were studied to reveal the strengthening mechanism of *** the presence of the tested five surfactants,cetyl trimethyl ammonium bromide(CTAB),dodecyl trimethyl ammonium bromide(DTAB),sodium dodecyl sulfate(SDS),sodium oleate and oleic acid,the permeability of WREOs is improved,the rare earth(RE)leaching efficiency increase and the impurity aluminum(Al)leaching efficiency decrease,indicating its promotional effect on the leaching process of ***,CTAB shows a better leaching enhancement,and the optimal addition dosage is 0.4 g/L for the two ammonium salt leaching agent *** kinetics analysis shows the internal diffusion controls model of RE and Al leaching process,and the leaching kinetics equations of RE and Al related to CTAB concentration were obtained for the two ammonium salt leaching *** to the chromatographic plate theory,the mass transfer efficiency of RE increases with the CTAB concentration increasing until 0.4 g/L,which confirms that the optimal CTAB addition is 0.4 g/*** adhesion work and adhesion work reduction factor indicate more favorable permeation as well as the leaching process.

关键词： Weathered crust elution-deposited rare earth ores Surfactant Kinetics Mass transfer

PVT1通过TGF-β1/SMAD通路促进子宫内膜基质细胞过度纤维化的研究

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中国性科学 2024年第1期33卷 82-86页

作者：杨强张志伟邱娟娟王雨潇山东第一医科大学第一附属医院妇产科济南250014 山东第一医科大学第一附属医院产科济南250014

目的探讨长链非编码RNA(lncRNA)浆细胞瘤多样异位基因1(PVT1)在调控子宫内膜基质细胞纤维化中的病理生理作用及分子机理。方法通过实时荧光定量聚合酶链反应(qRT-PCR)检测人子宫内膜基质细胞(HESCs)中PVT1、胶原蛋白Ⅰ、胶原蛋白Ⅲ、转... 详细信息

目的探讨长链非编码RNA(lncRNA)浆细胞瘤多样异位基因1(PVT1)在调控子宫内膜基质细胞纤维化中的病理生理作用及分子机理。方法通过实时荧光定量聚合酶链反应(qRT-PCR)检测人子宫内膜基质细胞(HESCs)中PVT1、胶原蛋白Ⅰ、胶原蛋白Ⅲ、转化生长因子-β1(TGF-β1)、SMAD2及SMAD3的表达水平。结果PVT1过表达促进HESCs增殖(P<0.05),而PVT1沉默抑制HESCs增殖(P<0.05)。过表达PVT1在HESCs中上调胶原蛋白Ⅰ和胶原蛋白ⅢmRNA的表达(P<0.05),而PVT1被敲除时,胶原蛋白Ⅰ和胶原蛋白ⅢmRNA的表达水平被显著下调(P<0.05)。过表达PVT1在HESCs中可以进一步上调TGF-β1/SMAD信号相关基因(TGF-β1、SMAD2、SMAD3)的表达(P<0.05)。当PVT1被敲除时,TGF-β1/SMAD信号相关基因胶原蛋白Ⅰ和胶原蛋白ⅢmRNA的表达水平被显著下调(P<0.05)。PVT1可诱导HESCs上清液中TGF-β1的产生(P<0.05)。结论PVT1可通过TGF-β1/SMAD通路促进子宫内膜基质细胞过度纤维化而产生胶原蛋白。同时,PVT1可能是一个用于治疗子宫内膜粘连的新靶点。

关键词：长链非编码RNA 浆细胞瘤多样异位基因1 纤维化子宫内膜基质细胞转化生长因子-β1/SMAD通路

基于建筑信息模型技术与智慧工地理念的地铁施工人员安全管理系统

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城市轨道交通研究 2024年第1期27卷 229-233页

作者：代永双张志伟北京市轨道交通建设管理有限公司北京100068 城市轨道交通全自动运行系统与安全监控北京重点实验室北京100068

[目的]人员的不安全行为是导致轨道交通工程施工安全事故的重要因素。为解决现存的视频图像监控系统依赖人工识别、安全质量问题发现不及时、不能及时报警等问题,需要对地铁施工人员安全管理系统展开研究。[方法]从整体架构、采集模块... 详细信息

[目的]人员的不安全行为是导致轨道交通工程施工安全事故的重要因素。为解决现存的视频图像监控系统依赖人工识别、安全质量问题发现不及时、不能及时报警等问题,需要对地铁施工人员安全管理系统展开研究。[方法]从整体架构、采集模块的设备安装、BIM(建筑信息模型)的建立及软件平台等方面,阐述了地铁施工人员安全管理系统的搭建方案。分析了地铁施工人员安全管理系统在具体工程试点的应用情况,进而验证该系统的智能识别准确性。[结果及结论]施工现场应用情况表明,地铁施工人员安全管理系统能智能识别未佩戴安全帽、进入禁止区域、睡岗离岗等人员不安全行为并自动报警,且报警正确率超过98%,大幅提高了安全隐患识别的精度和效率。相关人员通过交互终端即可实时查阅监控视频,实时接收报警信息,快速定位隐患发生位置并处置。

关键词：地铁安全管理系统安全隐患识别建筑信息模型智慧工地

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Partial Anomalous Pulmonary Venous Connection and the Nature of Associated Sinus Venosus Defect

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Congenital Heart Disease 2022年第2期17卷 201-214页

作者： Ling Sun Chengcheng Pang Xiaoyan Wang Mingguo Xu zhiwei zhang Shushui Wang Department of Pediatric Cardiology Guangdong Provincial People’s HospitalGuangdong Academy of Medical SciencesGuangdong Cardiovascular InstituteGuangdong Provincial Key Laboratory of South China Structural Heart DiseaseGuangzhouChina Department of Pediatric Cardiology Chengdu Women’s and Children’s Central HospitalThe Affiliated Women’s and Children’s HospitalSchool of MedicineUniversity of Electronic Science and Technology of ChinaChengduChina Department of Pediatric Cardiology Shenzhen Children’s HospitalShenzhenChina

Background:Partial anomalous pulmonary venous connection(PAPVC)is frequently associated with atrial septal defect(ASD),especially sinus venosus defect(SVD).Although Waggstaffe described the pathology of SVDs in 1868,the exact anatomic features and the nature of SVD remains *** with no posterior atrial rim were observed in recent ***,no studies suggested that absence of the residual posterior atrial septal tissue might be the key feature of *** aims of this study were to investigate if absence of posterior rim of atrial septum played a crucial role in patients with ***:From January 2011 to December 2019,256 children with PAPVC combined ASD and 878 children with isolated ASD who underwent corrective cardiac surgery were consecutively *** review of preoperative transthoracic echocardiography,computed-tomography images and surgical findings were performed by experienced pediatric *** subtypes of PAPVC,locations and types of ASD,and presence of posterior atrial rim of associated ASD were ***:PAPVC was right-sided in 244 children,left-sided in 6 children,and bilateral in 6 *** PAPVC cases,ASD without posterior atrial rim existed in 226 SVD *** without posterior atrial septum only existed in cases with one or more right pulmonary veins returning to right atrium(RA)or to RA-superior vena cava *** cases with isolated ASD,there were 3 SVD,and the other 875 cases were secundum ***:ASD without posterior atrial rims was associated with one or more right pulmonary veins returning to RA or RA-superior venous cava(SVC)*** SVD,the key feature is that the defect is in the posterior of the interatrial septum with no posterior septal rim,rather than adjacent to the SVC or to the inferior vena cava.

关键词： Partial anomalous pulmonary venous connection sinus venosus atrial septal defect echocardiography right atrium inferior vena cava

Advanced all-solid-state lithium-selenium batteries enabled by selenium-nitrogen doped hierarchic meso-microporous carbon nanospheres composite cathode

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中国化学快报:英文版 2023年第9期34卷 289-293页

作者： Chongxing Li Renbo Liu Shuxian zhang Qingyu Li Cong Wang zhiwei zhang Chengxiang Wang Longwei Yin Rutao Wang Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials Ministry of EducationSchool of Materials Science and EngineeringShandong UniversityJi’nan 250061China

Selenium,an element belonging to the same group in the periodic table as sulfur,has a high electronic conductivity(1×10^(-5)S/cm)and a high volumetric energy density(3253 mA h/cm^(3)),which is a prospective cathode material for high-energy all-solid-state rechargeable ***,its wide use is hindered by large volume expansion and low utilization *** this work,Se-infused nitrogen-doped hierarchical meso-microporous carbon composites(Se/NHPC)are prepared by a melt-diffusion *** Se is uniformly dispersed in meso-micropores of NHPC with a high mass loading of 81%.All-solid-state Li-Se batteries fabricated by using Se/NHPC as the cathode,a Li-In alloy as the anode,and Li_(6)PS_(5)Cl as the solid-state electrolyte,deliver a highly reversible capacity of 621 m Ah/g(92%of theoretical capacity),a good rate capability and a high capacity retention value of 80.9%after 100 *** is found that the capacity decay of Se cathode is mainly related to the interfacial degradation and the separation of Se from the carbon substrate,as suggested by the continuous increase of interfacial resistance and the structural transformation from amorphous Senchains to Se8rings initial discharge/charge cycle and then to the trigonally crystalline Se chains structure after the long-term cycles.

关键词： L-Se battery Solid-state electrolyte Carbon nanospheres Li_(6)PS_(5)Cl Composite