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China Foundry 2025年

作者： Wen-tong Liu Yi-dong Wu Lei Gao jing-yang Chen cheng-bo Xiao Xi-dong Hui State Key Laboratory for Advanced Metals and Materials University of Science and Technology Beijing Science and Technology on Advanced High Temperature Structural Materials Laboratory Beijing Institute of Aeronautical Materials

The size and shape effect(SSE) of components has become a critical issue for mechanical properties, application reliability, and processing. In this study, the creep rupture life(CRL) of components with different wall thicknesses and positions in a combustion chamber casing simulator made of K439B superalloy was investigated. The intrinsic mechanisms of the SSE were explored from the dendrite structure, volume fraction and size of the γ' phase, and element segregation, etc. It is shown that this casting exhibits a strong SSE of creep rupture life, characterized by a significant difference in the CRL values up to 60% with the variation of wall thickness and position in the casing. In terms of casting technology, the influence of SSE on CRL is actually determined by the cooling rate. The SSE on the creep rupture life originates from the dendrite structure(such as the secondary dendrite arm spacing), volume fraction size of the γ' phase in the dendrite trunk, and elements segregation rate. This work may have implications for the design and application of engineering components with large sizes and complex structures.

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激光快速成型不锈钢零件的研究

特种铸造及有色合金 2001年第4期21卷 19-20页

作者：席明哲张永忠章萍芝石力开程晶北京有色金属研究总院

采用激光快速成型先进技术制造出 3 16L不锈钢薄壁金属零件。研究结果表明 ,所成型零件的组织致密 ,组织特征为枝晶组织并且化学成分分布均匀。同时 ,金属薄壁零件的力学性能与常规加工方法制造的零件的力学性能相当。

关键词：激光快速成型枝晶组织不锈钢

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区域政策对广东产业转移的推动机制研究

特区经济 2011年第7期 30-32页

作者：陈雪梅石竟成刘艳艳暨南大学经济学院广东广州510632

产业转移作为一类客观经济现象,不仅有利于我国地区产业结构的合理升级,而且有助于我国区域经济的协调发展。在产业转移的过程中,区域政策的实施发挥着重要的作用。本文从广东省产业转移的现状出发,探讨了区域政策对产业转移的推动作用... 详细信息

产业转移作为一类客观经济现象,不仅有利于我国地区产业结构的合理升级,而且有助于我国区域经济的协调发展。在产业转移的过程中,区域政策的实施发挥着重要的作用。本文从广东省产业转移的现状出发,探讨了区域政策对产业转移的推动作用及存在的问题,最后对广东省区域政策的创新提出建议。

关键词：区域政策产业转移推动机制

Catalytic atroposelective synthesis of indolyl quinazolinones bearing N-N/C-C diaxes

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Science China Chemistry 2025年

作者： Ning-Yi Wang Shuo Gao Zhu-Di Shu Bei-Bei cheng Chun Ma Yu-Chen Zhang Feng shi Research Center of Chiral Functional Heterocycles School of Chemistry and Materials Science Jiangsu Normal University School of Petrochemical Engineering Changzhou University School of Chemistry and Chemical Engineering Henan Normal University

The first catalytic atroposelective synthesis of indole derivatives bearing N-N/C-C diaxes has been established by the strategy of de novo ring formation. By this strategy, various indolyl quinazolinones bearing vicinal N-N/C-C diaxes were synthesized in high yields with overall good diastereoselectivities and excellent enantioselectivities via chiral phosphoric acid-catalyzed onepot asymmetric formal (5+1) cycloaddition/oxidation reaction. Moreover, such indolyl quinazolinones bearing vicinal N-N/CC diaxes have good configurational stability and could be converted into new chiral ligands with applications in asymmetric catalysis. Therefore, this work not only offered a new member for the family of diaxial atropisomers, but also provided a powerful strategy for catalytic asymmetric synthesis of atropisomers bearing N-N/C-C diaxes.

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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

基于GIS的中国中老年人糖尿病空间分布及其影响因素分析

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中华疾病控制杂志 2017年第11期21卷 1082-1087页

作者：程文炜闫晓芳史静琤刘晓丽刘晓芳中南大学湘雅公共卫生学院流行病与卫生统计学系湖南长沙410078 湖南省职业病防治院防治科湖南长沙410007

目的基于地理信息系统(geographic information system,GIS)技术了解中国45岁及以上中老年人糖尿病患病的空间分布状况,以及主要影响因素的空间分布异质性,为完善区域化糖尿病防控措施提供科学依据。方法采用2011年中国健康与养老追踪... 详细信息

目的基于地理信息系统(geographic information system,GIS)技术了解中国45岁及以上中老年人糖尿病患病的空间分布状况,以及主要影响因素的空间分布异质性,为完善区域化糖尿病防控措施提供科学依据。方法采用2011年中国健康与养老追踪调查的基线数据,共纳入11 538名受访者。采用Geoda和Arc GIS 10.2软件进行糖尿病患病及其主要影响因素的空间分析。结果 2011年,我国(除香港、澳门、台湾、海南、宁夏和西藏外)45岁及以上中老年人糖尿病及糖尿病前期患病率分别为15.1%(患病率范围为7.9%~33.5%)和40.0%(前期患病率范围为17.6%~61.3%)。局部空间分析显示糖尿病患病率的聚集区域主要集中在我国北部(天津市和河北省)。地理加权回归显示高学历人群比重、超重率、高C反应蛋白率为糖尿病患病主要影响因素且存在空间分布异质性。结论中国有半数以上(55.1%)中老年人受到糖尿病威胁。糖尿病患病率及其主要影响因素具有空间分布异质性,重点防控区域主要集中在东北和北部地区,不同地区防治措施侧重应该有所不同。

关键词：糖尿病患病率地理信息系统

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深圳市医药广告违法率影响因素分析

中国临床药理学杂志 2015年第9期31卷 762-764页

作者：刘堃彭丽爱孙振球史静琤李贤冠中南大学公共卫生学院长沙410078 深圳市卫生监督局广东深圳518020

目的对深圳市医药广告发布情况及相关信息进行研究,了解医药广告违法率的影响因素,为医药广告监管和相关政策制定提供参考。方法用率和构成比对监测数据进行描述性分析,医药广告违法率的单因素分析用χ2检验,多因素分析用二分类Logisti... 详细信息

目的对深圳市医药广告发布情况及相关信息进行研究,了解医药广告违法率的影响因素,为医药广告监管和相关政策制定提供参考。方法用率和构成比对监测数据进行描述性分析,医药广告违法率的单因素分析用χ2检验,多因素分析用二分类Logistic回归分析。结果医疗广告监测系统2年共监测到66家医疗机构共发布医药广告202502次,违法42141次,违法率为20.81%。医药广告违法率的高低与季节、医疗机构类别、所在地区、性质1(按资产所有权性质划分)、性质2(按业务范围划分)、医疗机构级别、媒体类别、广告科室等8个因素有关。结论应重视对医药广告违法率影响重大的因素(平面、内科、门诊部、肛肠科和宝安区等),加强定向监管,进一步做好医药广告监管工作。

关键词：医药广告违法率影响因素卫生监督

深圳市2010-2013年医药广告现状分析

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中国临床药理学杂志 2015年第5期31卷 388-391页

作者：刘堃彭丽爱孙振球史静琤李贤冠中南大学公共卫生学院长沙410078 深圳市卫生监督局广东深圳518020

目的通过对深圳市医药广告发布情况进行监测并统计分析,了解其现状,分析违法医药广告的特征,为进一步完善医药广告监督管理提供参考。方法用率和构成比对2010年6月至2013年5月的监测数据进行描述性分析;不同率之间差异的比较用χ2检验... 详细信息

目的通过对深圳市医药广告发布情况进行监测并统计分析,了解其现状,分析违法医药广告的特征,为进一步完善医药广告监督管理提供参考。方法用率和构成比对2010年6月至2013年5月的监测数据进行描述性分析;不同率之间差异的比较用χ2检验。结果医疗广告监测系统3年共监测到医药广告253080次,违法64371次,违法率为25.44%。发布医药广告的医疗机构有97家,媒体有42家(22家电视、14家广播和6家报纸)。年度每月平均发布医药广告违法率整体呈递减趋势。不同医疗机构所在地区、性质和媒介类型的医药广告违法率之间的差异均有统计学意义。结论医疗广告监测系统对广告的监管起到了很好的辅助作用,但仍需加强对广播、平面的医药广告的监管。对网络的监管应是以后的发展方向。

关键词：医药广告卫生监督现状

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深圳市医疗机构药事管理现状研究

中国临床药理学杂志 2016年第4期32卷 373-375页

作者：刘堃彭丽爱孙振球史静琤李贤冠中南大学公共卫生学院长沙410078 深圳市卫生监督局广东深圳518020 长沙市第四医院信息科长沙410006

目的了解深圳市医疗机构药事管理的现状,发现其存在的主要问题,为进一步完善药事管理提供方向。方法用量表对医疗机构进行现场评估。用均数和标准差对医疗机构药事管理得分进行描述。汇总各医疗机构的扣分项,以探讨药事管理中存在的问... 详细信息

目的了解深圳市医疗机构药事管理的现状,发现其存在的主要问题,为进一步完善药事管理提供方向。方法用量表对医疗机构进行现场评估。用均数和标准差对医疗机构药事管理得分进行描述。汇总各医疗机构的扣分项,以探讨药事管理中存在的问题。结果此次共对深圳市108家医疗机构药事管理进行了评估,平均得分为(83.25±7.03)分。医院存在自身管理制度不完善,专业人员数量严重不足,业务知识不够熟练,药学人员学历普遍偏低,信息化建设水平不高,重点药品或试剂的监测力度不够和药房工作条件欠缺等问题。结论虽然部分医院药事管理得分较高,但也存在一些不足。今后有必要以监督为中心,加大对医疗机构药事管理的管理力度,严厉打击违法行为,进一步促进医院药事管理。

关键词：医疗机构药事管理现状

Advanced Functional Electromagnetic shielding Materials:A Review Based on Micro‑Nano Structure Interface Control of Biomass Cell Walls

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Nano-Micro Letters 2025年第1期17卷 98-134页

作者： Yang shi Mingjun Wu Shengbo Ge Jianzhang Li Anoud Saud Alshammari jing Luo Mohammed A.Amin Hua Qiu Jinxuan Jiang Yazeed M.Asiri Runzhou Huang Hua Hou Zeinhom M.El‑Bahy Zhanhu Guo Chong Jia Kaimeng Xu Xiangmeng Chen Co‑Innovation Center of Efficient Processing and Utilization of Forest Resources College of Materials Science and EngineeringNanjing Forestry UniversityNanjing 210037People’s Republic of China State Key Laboratory of Efficient Production of Forest Resourced Beijing Forestry UniversityQinghua East Road 35Haidian DistrictBeijing 100083People’s Republic of China Department of Physics Faculty of Sciences‑ArarNorthern Border UniversityArar 91431Saudi Arabia Department of Chemistry College of ScienceTaif UniversityP.O.Box 1109921944 TaifSaudi Arabia Shaanxi Key Laboratory of Macromolecular Science and Technology School of Chemistry and Chemical EngineeringNorthwestern Polytechnical UniversityXi’anShaanxi 710072People’s Republic of China Integrated Composites Lab Department of Mechanical and Construction EngineeringNorthumbria UniversityNewcastle Upon Tyne NE18STUK College of Materials Science and Engineering Taiyuan University of Science and TechnologyTaiyuan 030024People’s Republic of China Department of Chemistry Faculty of ScienceAl-Azhar UniversityNasr CityCairo 11884Egypt Yunnan Provincial Key Laboratory of Wood Adhesives and Glued Products International Joint Research Center for Biomass MaterialsSouthwest Forestry UniversityKunming 650224People’s Republic of China School of Science Henan Agricultural UniversityZhengzhou 450002People’s Republic of China

Research efforts on electromagnetic interference(EMI)shielding materials have begun to converge on green and sustainable biomass *** materials offer numerous advantages such as being lightweight,porous,and *** to their porous nature,interfacial compatibility,and electrical conductivity,biomass materials hold significant potential as EMI shielding *** concerted efforts on the EMI shielding of biomass materials have been reported,this research area is still relatively new compared to traditional EMI shielding *** particular,a more comprehensive study and summary of the factors influencing biomass EMI shielding materials including the pore structure adjustment,preparation process,and micro-control would be *** preparation methods and characteristics of wood,bamboo,cellulose and lignin in EMI shielding field are critically discussed in this paper,and similar biomass EMI materials are summarized and *** composite methods and fillers of various biomass materials were *** paper also highlights the mechanism of EMI shielding as well as existing prospects and challenges for development trends in this field.

关键词： Biomass materials Electromagnetic interference shielding Micro-nano structure interface control Conductivity