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基于云监测平台的跨铁路桥梁转体智能监测技术及应用

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世界桥梁 2024年第4期52卷 69-76页

作者：李泽露李新伟李华鹏王克兵张美玲信阳城发路桥建设开发有限公司河南信阳464000 桥梁智能与绿色建造全国重点实验室湖北武汉430034 中铁大桥科学研究院有限公司湖北武汉430034

为实现跨铁路桥梁转体过程中的实时智能监测,以提高转体效率和精度,基于云监测平台的数字孪生理论,融合BIM+GIS、智能传感、物联网、边缘计算、云计算等信息化技术,研发了跨铁路桥梁转体智能监测系统。该系统通过智能设备对环境参数、... 详细信息

为实现跨铁路桥梁转体过程中的实时智能监测,以提高转体效率和精度,基于云监测平台的数字孪生理论,融合BIM+GIS、智能传感、物联网、边缘计算、云计算等信息化技术,研发了跨铁路桥梁转体智能监测系统。该系统通过智能设备对环境参数、转体参数、结构应力等进行实时监测和同步转体模拟展示,实现桥梁转体全过程智能感知、分析预警及可视化的控制目标。通过实时监测转体桥梁悬臂端位置三维坐标,提出转体角度、转体速度、转体距离等转体参数计算公式,计算结果更符合实际转体情况;针对双转体桥联动监测,给出了双幅桥转体时防碰撞距离计算公式。该系统已成功应用于多座转体桥梁工程,均实现了高效率转体、高精度对位。

关键词：跨线桥转体施工云监测平台信息化技术智能监测系统转体参数双转体桥联动监测工程应用

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新型桥塔临时横撑及永久斜撑施工控制研究

工程技术研究 2024年第8期9卷 1-4页

作者：杨黎明王伟王克兵李文涛甘肃五环公路工程有限公司甘肃兰州730050 中铁大桥科学研究院有限公司湖北武汉430034 桥梁结构健康与安全国家重点实验室湖北武汉430034 湖北工业大学湖北武汉430068

为保证桥塔临时横撑拆除及永久斜撑安装施工安全与稳定,文章以桑园子黄河大桥桥塔为例,运用Midas Civil软件对桥塔临时横撑拆除及斜撑混凝土浇筑进行施工方案优化。结果表明,永久斜撑的存在有利于提前拆除临时横撑,且封顶前的临时横撑... 详细信息

为保证桥塔临时横撑拆除及永久斜撑安装施工安全与稳定,文章以桑园子黄河大桥桥塔为例,运用Midas Civil软件对桥塔临时横撑拆除及斜撑混凝土浇筑进行施工方案优化。结果表明,永久斜撑的存在有利于提前拆除临时横撑,且封顶前的临时横撑拆除顺序对桥塔成桥应力的影响较小,对临时横撑拆除力影响较大;斜撑安装后进行斜撑内混凝土浇筑有利于斜撑适应后期桥塔的受力变化;采用优化后的施工方式,塔柱应力实测值与计算值的发展趋势基本一致,最大应力偏差为0.32 MPa,满足规范要求。

关键词：公路桥梁新型桥塔临时横撑永久斜撑横撑拆除力数值计算

Catalytic Systems Containing p-Toluenesulfonic Acid for the Coupling Reaction of Formaldehyde and Methyl Formate

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Journal of Natural Gas Chemistry 2007年第3期16卷 286-292页

作者： kebing wang Jie Yao Yue wang Gongying wang Chengdu Institute of Organic Chemistry Chinese Academy of Sciences Chengdu 610041 Sichuan China Graduate School of Chinese Academy of Sciences Beijing 100039 China

The coupling reaction of formaldehyde （FA） and methyl formate （MF） to form methyl glycolate （MG） and methyl methoxy acetate （MMAc）, catalyzed by p-toluenesulfonic acid （p-TsOH） as well as assisted by different kinds of solvents or Ni-containing compounds, had been investigated. The results showed that when the reaction was carried out at 140 ℃, with a molar ratio of FA to MF of 0.65 ： 1, molar fraction of p-TsOH to total feedstock of 11.0%, and reaction time of 3 h, the yield of MG and MMAc was 31.1% and 17.1%, respectively, p-TsOH catalyzed the coupling reaction by means of the synergistic catalysis of protonic acidity and soft basicity. Adding extra solvents to the reaction system was unfavorable for the reaction. The composite catalytic system consisting of p-TsOH and NiX2 （X=Cl, Br, I） exhibited a high catalytic performance for the coupling reaction, and NiX2 acted as a promoter in the reaction, whose promotion for the catalysis increased in the following order： NiCl2〈NiBr2〈NiI2. The present system is less corrosive when compared with the previous system, in which strong inorganic liquid acids were used as catalysts.

关键词： formaldehyde methyl formate methyl glycolate methyl methoxy acetate p-toluenesulfonicacid

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保护射精技术在前列腺等离子剜除术中的应用

中华腔镜泌尿外科杂志(电子版) 2024年第2期18卷 152-156页

作者：汪洋李志鹏张楠何海填杨伟锋张焕灵王可兵深圳市前海蛇口自贸区医院泌尿外科昆明医科大学第二附属医院泌尿外科

目的探讨保护射精技术在前列腺等离子剜除术中的应用效果。方法分析2015年6月至2022年9月在深圳市前海蛇口自贸区医院及昆明医科大学第二附属医院行经尿道前列腺等离子剜除术治疗的106例具有正常射精功能的前列腺增生患者临床资料，... 详细信息

目的探讨保护射精技术在前列腺等离子剜除术中的应用效果。方法分析2015年6月至2022年9月在深圳市前海蛇口自贸区医院及昆明医科大学第二附属医院行经尿道前列腺等离子剜除术治疗的106例具有正常射精功能的前列腺增生患者临床资料，术中均保留了精阜近端及两侧1 cm范围内的组织和黏膜。观察患者手术时间、膀胱冲洗时间、留置导尿时间、术后住院天数、手术并发症发生情况，术前和术后1、6个月的患者国际前列腺症状评分(IPSS)、生活质量评分(QOL)、最大尿流率(Qmax)、膀胱残余尿量(PVR)、国际勃起功能评分(IIEF-5)和术后6个月患者逆行射精比例。结果 106例患者均成功完成手术，无中转开放手术。手术时间36～115 min，平均(66±12)min；膀胱冲洗时间0～46 h，平均(29.3±2.8)h；留置尿管时间2～5 d，平均(3.8±0.7)d；术后住院天数3～7 d，平均(4.1±1.2)d。术后1、6个月患者Qmax、PVR、IPSS和QOL均较术前有明显改善(P0.05)；术后6个月106例患者射精量不变、减少、消失的例数分别为89例(83.96%)、6例(5.66%)、11例(10.38%)。术后有13例(12.26%)出现短暂性尿失禁，经提肛锻炼后1个月内控尿恢复正常。术中无大出血、无直肠和膀胱损伤病例，术后无输血、无尿道狭窄等并发症。结论经尿道前列腺等离子剜除术中采用保护射精技术不仅可缓解前列腺增生患者的临床症状，同时可有效的保护射精功能、减少术后逆行射精的比例，值得推广应用。

关键词：前列腺增生前列腺剜除术射精功能保护逆行射精

Cu^(Ⅱ)-loaded polydopaminecoatingswith in situ nitric oxidegenerationfunctionforimproved hemocompatibility

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Regenerative Biomaterials 2020年第2期7卷 153-160页

作者： Lei Zhou Xin Li kebing wang Fangyu Shen Lu Zhang Peichuang Li Tengda Shang Jin wang Nan Huang Key Laboratories of Advanced Technology for Materials of Education Ministry School of Materials Science and EngineeringSouthwest Jiaotong UniversityChengduSichuan 610031China

NO is the earliest discovered gas signal molecule which is produced by normal healthy endothelial cells,and it has many functions,such as maintaining cardiovascular homeostasis,regulating vasodilation,inhibiting intimal hyperplasia and preventing atherosclerosis in the blood *** NO release is often observed in the pathological environment,for instance *** was discovered that NO could be released from the human endogenous NO donor by many compounds,and these methods can be used for the treatment of certain diseases in the blood *** this work,a series of copper-loaded polydopamine(PDA)coatings were produced through self-polymerization time for 24,48 and 72 *** chemical composition and structure,coating thickness and hydrophilicity of the different copper-loaded PDA coatings surfaces were characterized by phenol hydroxyl quantitative,X-ray photoelectron spectroscopy,ellipsometry atomic force microscopy and water contact *** results indicate that the thickness and the surface phenolic hydroxyl density of the PDA coatings increased with the polymerization *** copperloaded coating has glutathione peroxidase-like activity,and it has the capability of catalyzing NO releasing from *** surface of the coating showed desirable hemocompatibility,the adhesion and activation of platelets were inhibited on the copper-loaded *** the same time,the formation of the thrombosis was also *** copper-loaded PDA coatings could provide a promising platform for the development of blood contact materials.

关键词： nitric oxide polydopamine coating copper ion hemocompatibility

Preparation of phospholipid-based polycarbonate urethanes for potential applications of blood-contacting implants

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Regenerative Biomaterials 2020年第5期7卷 491-504页

作者： Peichuang Li Wanhao Cai Xin Li kebing wang Lei Zhou Tianxue You Rui wang Hang Chen Yuancong Zhao Jin wang Nan Huang Key Lab.of Advanced Technology for Materials of Education Ministry Southwest Jiaotong UniversityChengdu 610031China School of Materials Science and Engineering Southwest Jiaotong UniversityChengdu 610031China Institute of Physical Chemistry University of FreiburgAlbertstraße 21aFreiburg 79104Germany

Polyurethanes are widely used in interventional devices due to the excellent physicochemical ***,non-specific adhesion and severe inflammatory response of ordinary polyurethanes may lead to severe complications of intravenous ***,a novel phospholipid-based polycarbonate urethanes(PCUs)were developed via two-step solution polymerization by direct synthesis based on functional raw ***,PCUs were coated on biomedical metal sheets to construct biomimetic anti-fouling *** results of stress–strain curves exhibited excellent tensile properties of PCUs *** scanning calorimetry results indicated that the microphase separation of such PCUs polymers could be well regulated by adjusting the formulation of chain extender,leading to different biological *** vitro blood compatibility tests including bovine serum albumin adsorption,fibrinogen adsorption and denaturation,platelet adhesion and whole-blood experiment showed superior performance in inhibition non-specific adhesion of PCUs *** cells and smooth muscle cells culture tests further revealed a good anti-cell adhesion ***,animal experiments including ex vivo blood circulation and subcutaneous inflammation animal experiments indicated a strong ability in anti-thrombosis and *** results high light the strong anti-adhesion property of phospholipid-based PCUs films,which may be applied to the blood-contacting implants such as intravenous catheter or antithrombotic surface in the future.

关键词： phospholipid polycarbonate urethanes non-specific adhesion anti-thrombosis histocompatibility

Adhesive and Self-Healing Polyurethanes with Tunable Multifunctionality

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Research 2023年第1期2022卷 427-443页

作者： Lei Zhou Lu Zhang Peichuang Li Manfred F.Maitz kebing wang Tengda Shang Sheng Dai Yudie Fu Yuancong Zhao Zhilu Yang Jin wang Xin Li School of Materials Science and Engineering Southwest Jiaotong UniversityDepartment of CardiologyThird People's Hospital of Chengdu Affiliated to Southwest Jiaotong UniversityChengdu610031 SichuanChina Heze Branch Qilu University of Technology(Shandong Academy of Sciences)Biological Engineering Technology Innovation Center of Shandong ProvinceHeze 274000China Max Bergmann Center of Biomaterials Dresden Leibniz Institute of Polymer Research DresdenHohe Strasse 601069DresdenGermany Affiliated Dongguan Hospital Southern Medical UniversityDongguanGuangdong 523059China Guangdong Provincial Key Laboratory of Cardiac Function and Microcirculation GuangzhouGuangdong 510080China

Many polyurethanes(PUs)are blood-contacting materials due to their good mechanical properties,fatigue resistance,cytocompatibility,biosafety,and relatively good *** functionalization of the PUs using chemical synthetic methods is especially attractive for expanding their ***,a series of catechol functionalized PU(CPU-PTMEG)elastomers containing variable molecular weight of polytetramethylene ether glycol(PTMEG)soft segment are reported by stepwise polymerization and further introduction of *** the molecular weight of PTMEG fragment enables a regulable catechol content,mobility of the chain segment,hydrogen bond and microphase separation of the C-PUPTMEG elastomers,thus offering tunability of mechanical strength(such as breaking strength from 1.3 MPa to 5.7 MPa),adhesion,self-healing eficiency(from 14.9%to 96.7%within 2 hours),anticoagulant,antioxidation,anti-inflammatory properties and cellular growth *** cardiovascular stent coatings,the C-PU-PTMEGs demonstrate enough flexibility to withstand deformation during the balloon dilation *** special importance is that the C-PU-PTMEG-coated surfaces show the ability to rapidly scavenge free radicals to maintain normal growth of endothelial cells,inhibit smooth muscle cell proliferation,mediate inflammatory response,and reduce thrombus *** the universality of surface adhesion and tunable multifunctionality,these novel C-PU-PTMEG elastomers should find potential usage in artificial heart valves and surface engineering of stents.

关键词： fatigue deformation catechol

基于政府不同补贴形式下的绿色产品制造商渠道选择策略分析

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中国管理科学 2024年第3期32卷 167-177页

作者：陈克兵王雨琦南京航空航天大学经济与管理学院江苏南京210016

为促进可持续供应链的发展,政府通常会根据企业的绿色研发成本尝试采用不同的补贴形式,制造商也会根据政府的补贴形式设计不同的渠道结构来销售产品。本文构建了一个由政府为领导者,制造商和零售商为跟随者组成的供应链博弈模型。根据... 详细信息

为促进可持续供应链的发展,政府通常会根据企业的绿色研发成本尝试采用不同的补贴形式,制造商也会根据政府的补贴形式设计不同的渠道结构来销售产品。本文构建了一个由政府为领导者,制造商和零售商为跟随者组成的供应链博弈模型。根据制造商绿色生产技术,政府提供其研发成本补贴或单位生产补贴,研究了制造商采取不同销售渠道结构下的政府补贴、制造商产品绿色度水平和直销渠道价格,及各个成员的利润或绩效。研究结果表明:政府补贴形式与制造商的绿色技术投入及渠道结构选择之间存在密切关联性。从制造商角度看,当政府向制造商提供研发成本补贴时,若制造商降低其绿色研发成本,则制造商采用双渠道结构模式能减少政府支出,并且是对制造商、零售商和政府都更优的策略。而当政府向制造商提供单位生产补贴时,制造商则需综合考虑消费者环保意识、价格弹性和绿色技术开发成本率等因素选择不同的渠道结构。此外,从政府绩效角度看,当绿色技术开发成本或环境改善的边际收益较低时,采用单位生产补贴将更利于政府和环保产品生产的政策,同时更有利于制造商和零售商的利益;否则,政府应采用研发成本补贴策略。

关键词：绿色供应链补贴渠道策略绿色度政府绩效

一步炭化磺化法制备煤基固体酸催化剂及其表征

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中国油脂 2022年第6期47卷 100-104页

作者：王雪王克冰钟源刘玉玲内蒙古农业大学理学院呼和浩特010018

以胜利褐煤为原料,通过浓硫酸一步炭化磺化法制备煤基固体酸催化剂,以油酸和甲醇的酯化反应评价催化剂的催化活性。采用单因素实验考察了固液比、磺化温度、磺化时间对催化活性的影响。采用红外光谱、元素分析、BET、SEM、XRD、热重分... 详细信息

以胜利褐煤为原料,通过浓硫酸一步炭化磺化法制备煤基固体酸催化剂,以油酸和甲醇的酯化反应评价催化剂的催化活性。采用单因素实验考察了固液比、磺化温度、磺化时间对催化活性的影响。采用红外光谱、元素分析、BET、SEM、XRD、热重分析等对煤基固体酸催化剂进行表征。结果表明,当磺化温度为110℃、磺化时间为90 min、固液比为1∶17时,煤基固体酸催化剂具有最优的催化活性,其催化油酸和甲醇的酯化反应的酯化率达到93.50%。煤基固体酸催化剂为具有较低石墨化程度的无定形碳结构,磺酸基已成功键合到了碳基载体上,同时具有丰富的含氧官能团,其表面呈现密集孔结构,且以介孔为主。煤基固体酸催化剂在低于140℃时具有较好的热稳定性,重复使用5次后,催化酯化率为57.21%。

关键词：煤基固体酸一步法炭化磺化催化剂酯化反应