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Synthesis of high molecular weight polylactic acid from aqueous lactic acid co-catalyzed by tin(II)chloride dihydrate and succinic anhydride

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Chinese Science Bulletin 2005年第20期50卷 2390-2392页

作者： LEI ziqiang bai Yanbin WANG Shoufeng Key Laboratory of Polymer Materials of Gansu Province College of Chemistry and Chemical Engineering Northwest Normal University Lanzhou 730070 China

Polylactic acid was synthesized from commer- cial available cheap aqueous lactic acid (85%―90% w/w) using succinic anhydride and SnCl2·2H2O as catalyst in the absence of organic solvents. As a result, polylactic acid with a molecular weight of 60000 was prepared in 10 h. The new procedure is much simple, cheap and outstanding in that the start material is aqueous lactic acid; the catalytic system is environmentally benign.

关键词：聚合物催化剂有机溶剂分子结构乳酸

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基于超声波传感器的AGV模糊避障设计

自动化应用 2024年第15期65卷 24-27页

作者：白自强邢希达李敏商宝富周晓迪王兴宾山东北方光学电子有限公司山东泰安271000

根据工业现场实际生产状况,设计了一款用于避障的AGV小车。四传感器融合的模糊控制系统用于AGV避障,通过远程API控制AGV在CoppeliaSim中进行避障仿真,实现了MATLAB(客户端)和CoppeliaSim(服务器)跨越两平台联合实时仿真,论证了该四传感... 详细信息

根据工业现场实际生产状况,设计了一款用于避障的AGV小车。四传感器融合的模糊控制系统用于AGV避障,通过远程API控制AGV在CoppeliaSim中进行避障仿真,实现了MATLAB(客户端)和CoppeliaSim(服务器)跨越两平台联合实时仿真,论证了该四传感器融合模糊控制可用于行进过程中躲避障碍物,为后期的控制系统优化提供了一定依据。

关键词：四传感器融合模糊逻辑控制器远程 API 避障

Application of geophysical well logs in solving geologic issues:Past,present and future prospect

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Geoscience Frontiers 2024年第3期15卷 85-118页

作者： Jin Lai Yang Su Lu Xiao Fei Zhao Tianyu bai Yuhang Li Hongbin Li Yuyue Huang Guiwen Wang ziqiang Qin National Key Laboratory of Petroleum Resources and Engineering China University of Petroleum(Beijing)Beijing 102249China College of Geosciences China University of Petroleum(Beijing)Beijing 102249China Department of Petroleum Engineering University of WyomingLaramieWY 82071USA

Geophysical well logs are widely used in geological fields,however,there are considerable incompatibilities existing in solving geological issues using well log *** review critically fills the gaps between geology and geophysical well logs,as assessed from peer reviewed papers and from the authors’personal experiences,in the particular goal of solving geological issues using geophysical well *** origin and history of geophysical logging are *** follows a review of the state of knowledge for geophysical well logs in terms of type of specifications,vertical resolution,depth of investigations and demonstrated *** the current status and advances in applications of geophysical well logs in fields of structural geology,sedimentary geology and petroleum geology are *** logs are used in structural and sedimentary geology in terms of structure detection,in situ stress evaluation,sedimentary characterization,sequence stratigraphy division and fracture *** logs can also be applied in petroleum geology fields of optimizing sweet spots for hydraulic fracturing in unconventional oil and gas *** well logs are extending their application in other fields of geosciences,and geological issues will be efficiently solved via well logs with the improvements of advanced well log *** work is required in order to improve accuracy and diminish uncertainties by introducing artificial *** review provides a systematic and clear descriptions of the applications of geophysical well log data along with examples of how the data is displayed and processed for solving geologic problems.

关键词： Geophysical well logs Sequence stratigraphy Source rock Unconventional oil and gas resources Artificial intelligence

Synthesis of high molecular weight polylactic acid from aqueous lactic acid co-catalyzed by tin(II)chloride dihydrate and succinic anhydride

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Science Bulletin 2005年第20期 136-138页

作者： LEI ziqiang, bai Yanbin & WANG Shoufeng Key Laboratory of Polymer Materials of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China

关键词： polylactic acid bulk polymerization catalytic polymeri- zation.

基于Matlab和V-REP平台的AGV运动学分析

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北京信息科技大学学报（自然科学版） 2020年第3期35卷 80-84,88页

作者：白自强韩秋实北京信息科技大学机电工程学院北京100192

设计了一款用于智能焊接车间的自动导引运输车(AGV)。运用SolidWorks软件进行三维建模,建立了差速驱动AGV的运动学方程,并运用Simulink搭建了运动学模型。在V-REP(virtual robot experimentation platform)软件中建立了AGV虚拟样机,Mat... 详细信息

设计了一款用于智能焊接车间的自动导引运输车(AGV)。运用SolidWorks软件进行三维建模,建立了差速驱动AGV的运动学方程,并运用Simulink搭建了运动学模型。在V-REP(virtual robot experimentation platform)软件中建立了AGV虚拟样机,Matlab通过远程API,控制AGV在V-REP中进行仿真,通过AGV理论计算和仿真结果的对比,验证了运动学理论分析的正确性,对AGV的控制具有一定的参考价值,为AGV控制系统的设计提供了依据。

关键词： AGV运动学方程 Simulink模型 V-REP模型远程API

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基于基金项目数据的研究前沿主题探测方法

图书情报工作 2017年第13期61卷 87-98页

作者：王效岳刘自强白如江徐路路陈军营山东理工大学科技信息研究所淄博255049

[目的 /意义]根据基金项目数据的特点,提出基于基金项目数据的研究前沿主题探测方法,以期识别出前瞻价值更高的研究前沿,为研究前沿识别相关研究提供借鉴思路。[方法/过程]首先,基于PLDA模型识别蕴含在基金项目文本中的研究主题;然后基... 详细信息

[目的 /意义]根据基金项目数据的特点,提出基于基金项目数据的研究前沿主题探测方法,以期识别出前瞻价值更高的研究前沿,为研究前沿识别相关研究提供借鉴思路。[方法/过程]首先,基于PLDA模型识别蕴含在基金项目文本中的研究主题;然后基于主题-文档矩阵建立主题和基金项目文档的映射关系,在此基础上,利用主题的资助时间、资助金额和中心性指标进行研究前沿主题探测,从而识别出值得关注的研究前沿主题;最后,利用主题演化可视化分析方法,对研究前沿主题进行演化分析,以预测其发展趋势。[结果 /结论]研究结果表明,该方法可以根据基金项目数据的特点识别出蕴含在其中的研究前沿主题,并且能够分析研究前沿主题的分裂、融合等演化过程。

关键词：研究前沿主题探测指标体系演化分析可视化

Detrital zircon U-Pb dating in the southern Hefei Basin: Evidence for exhumation of HP-UHP rocks of the Dabie Orogen

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Science China Earth Sciences 2020年第7期63卷 954-968页

作者： Yongsheng WANG Qiao bai ziqiang TIAN Hui DU School of Resources and Environmental Engineering Hefei University of TechnologyHefei 230009China

The Hefei Basin of eastern China developed in response to uplift of the Dabie Orogen,and zircon dating can be used to assess the exhumation history of the *** were collected from samples of the Lower Jurassic Fanghushan Formation and Middle Jurassic Sanjianpu Formation in the southern Hefei Basin,and mica-quartz schist and biotite granite gneiss from the Susong Complex of the Dabie *** zircon U-Pb dating was undertaken using laser ablation-inductively coupled plasma-mass *** detrital zircons from conglomerates of the Fanghushan Formation and from clasts within the conglomerates have age-frequency distributions with the main clusters between 2.0 and 1.8 Ga,similar to age data of the Susong *** the other hand,the zircons of the Fanghushan Formation do not show the age cluster at 1000–900 Ma that characterizes zircons in the underlying metasediments of the lower Paleozoic Foziling Group.A cluster of Triassic zircon ages also appears in the arkosic sandstones of the Fanghushan *** data indicate that the provenance of the Fanghushan Formation was a mixture of high-pressure(HP)and ultrahigh-pressure(UHP)Triassic metamorphic rocks,Paleozoic magmatic rocks,and the Susong Complex,but not the lower Paleozoic Foziling Group even though it directly underlies the sediments of the Hefei *** samples from the Sanjianpu Formation show zircon age clusters at 797 and 791 Ma(middle Neoproterozoic)and 226 Ma(Triassic),and again,these are markedly different from the age clusters that characterize the Foziling *** seems,therefore,that despite the Foziling Group being at the surface in the underwater depositional area of the Hefei Basin,it was not exposed in the source area of the Hefei basinal sediments during the Jurassic,and there are two possible reasons for ***,the exhumation of the Dabie Orogen was directed partly towards the north,in the process of which some of the Foziling Group was ***,the Susong Compl

关键词： Dabie Orogen Exhumation of HP-UHP rocks Hefei Basin Lower-Middle Jurassic Zircon dating

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热消融治疗肺癌的研究进展

中国胸心血管外科临床杂志 2024年第1期31卷 166-172页

作者：洪子强金大成白向豆崔百强苟云久甘肃中医药大学第一临床医学院兰州730000 甘肃省人民医院胸外科兰州730000

虽然手术切除仍是Ⅰ期非小细胞肺癌(non-small cell lung cancer,NSCLC)的最佳治疗策略,但经皮热消融治疗为无法行手术切除的患者提供了重要选择。目前,主要有3种热消融方法用于肺癌治疗:射频消融(radiofrequency ablation,RFA)、微波消... 详细信息

虽然手术切除仍是Ⅰ期非小细胞肺癌(non-small cell lung cancer,NSCLC)的最佳治疗策略,但经皮热消融治疗为无法行手术切除的患者提供了重要选择。目前,主要有3种热消融方法用于肺癌治疗:射频消融(radiofrequency ablation,RFA)、微波消融(microwave ablation,MWA)和氩氦刀冷冻消融(argon-helium cryoablation,AHC)。随着技术的改进和经验的积累,在最初应用的RFA中观察到的一些局限性,如热沉效应、皮肤灼伤和快速碳化等在MWA和AHC的发展中得以克服。热消融治疗肺癌的可行性和安全性已得到验证并且疗效显著提高(尤其肿瘤直径≤3 cm时)。本文将主要讨论这些消融技术在肺癌治疗中的应用和研究进展。

关键词：肺癌转移癌热消融射频消融微波消融氩氦刀冷冻消融综述

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非小细胞肺癌生物标志物的研究进展

中国胸心血管外科临床杂志 2024年第2期31卷 311-318页

作者：洪子强金大成白向豆崔百强苟云久甘肃中医药大学第一临床医学院兰州730000 甘肃省人民医院胸外科兰州730000

肺癌是全球癌症相关死亡的主要原因。尽管通过筛查高危人群进行早期检测越来越普遍,但大多数肺癌患者确诊时已是晚期。在过去10年中,非小细胞肺癌(non-small cell lung cancer,NSCLC)治疗有了显著进步。新出现的靶向治疗和免疫治疗方案... 详细信息

肺癌是全球癌症相关死亡的主要原因。尽管通过筛查高危人群进行早期检测越来越普遍,但大多数肺癌患者确诊时已是晚期。在过去10年中,非小细胞肺癌(non-small cell lung cancer,NSCLC)治疗有了显著进步。新出现的靶向治疗和免疫治疗方案已使NSCLC治疗更具个体化,这显著影响了NSCLC患者的病程和结局。目前,分子生物标志物已经成为诊断癌症、预测治疗反应结果和评估预后的有利工具。本文总结了NSCLC诊断、预测和预后相关的生物标志物以及新型潜在预测性生物标志物。

关键词：生物标志物非小细胞肺癌靶向治疗免疫疗法诊断预后综述