检索结果-南通市图书馆

International Journal of Minerals,Metallurgy and Materials 2011年第1期18卷 42-47页

作者： Xue-qun cheng cheng-tao li Chao-fang Dong Xiao-gang li Corrosion and Protection Center University of Science and Technology Beijing Beijing 100083 China Key Laboratory of the Ministry of Education of China for Corrosion and Protection Beijing 100083 China

The passive film formed on 2205 duplex stainless steel（DSS） in 0.5 M NaHCO3＋0.5 M NaCl aqueous solution was characterized by electrochemical measurements,including potentiodynamic anodic polarization and dynamic electrochemical impedance spectroscopy（DEIS）.The results demonstrate that there is a great difference between the passive film evolutions of ferrite and *** impedance values of ferrite are higher than those of *** impedance peaks of ferritic and austenitic phases correspond to the potential of 0.15 and 0.25 V in the low potential range and correspond to 0.8 and 0.75 V in the high potential *** evolutions of the capacitance of both phases are reverse compared to the evolutions of *** thickness variations obtained from capacitance agree well with those of impedance *** results can be used to explain why pitting corrosion occurs more easily in austenite phase than in ferrite phase.

关键词： stainless steel electrochemical impedance spectroscopy ferrite austenite passivation films

Ultrasonic interventional analgesia in pancreatic carcinoma with chemical destruction of celiac ganglion

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2006年第20期12卷 3288-3291页

作者： tao Wang Fu-Zhou Tian Zhong-Hong Cai Xu li tao cheng li Shi Qi cheng Department of The General Hospital of chengdu Military Command Area Chengdu 610085 Sichuan Province China

AIM： To detect the therapeutic effects of chemical destruction of celiac ganglion in patients with pancreatic carcinoma with intractable pain. METHODS： Ninety-seven cases with advanced pancreatic carcinoma received chemical destruction of celiac ganglion-5 mL pure alcohol injection around celiac artery under ultrasonic guidance. The changes of visual analogue scale （VAS）, serum substance P （Sub P）, β-endopeptide （β-EP） and T-lymphocyte subtypes level were compared between pre- and post-therapy. RESULTS： Successful rate of puncture was 98.7%, with one failure. No serious complications such as traumatic pancreatitis, pancreatic fistula, abdominal cavity hemorrhage or peritoneal infection occurred. VAS, serum Sub P and β-EP level significantly changed after treatment （8.0 ± 2.3 vs 4.6 ± 2.1, 254.1 ± 96.7 vs 182.4 ± 77.6, 3.2 ± 0.8 vs 8.8 ± 2.1, P 〈 0.01, P 〈 0.05, P 〈 0.01） with complete relief rate 54.2%, partial relief rate 21.9%, ineffective rate 12.5% and recurrent rate 10.7%. The T-lymphocyte subtypes level remarkably increased when compared with that of pre-therapy （46.7 ± 3.7 vs 62.5 ± 5.5, P 〈 0.01）. CONCLUSION： Our study suggests that chemical destruction of celiac ganglion under ultrasonic guidance is highly safe, and can evidently relieve cancer pain and improve the cellular immunity in patients with advanced pancreatic carcinoma.

关键词： Pancreatic carcinoma Analgesia Chemical destruction Ultrasonic intervention Celiac ganglion

Study on pitting process of 316L stainless steel by means of staircase potential electrochemical impedance spectroscopy

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Minerals,Metallurgy and Materials 2011年第1期18卷 48-52页

作者： Zhi-jun Jia Cui-wei Du cheng-tao li Zou Yi Xiao-gang li School of Materials Science and Technology University of science and Technology Beijing Beijing 100083 China

Pitting corrosion of 316L stainless steel in NaCl solution was investigated by means of staircase potential electrochemical impedance spectroscopy（SPEIS）.The investigation focused on the transition of stainless steel from the passive state to pitting *** on the evolution of electrical parameters of the equivalent electrical circuit,it is suggested that the most probable mechanism of pit creation is the film breaking *** result demonstrates that staircase potential electrochemical impedance spectroscopy is an effective method for the investigation of pitting corrosion.

关键词： stainless steel passivation film steel corrosion pitting electrochemical impedance spectroscopy

Effect of rare earth content on microstructure and corrosion resistance of hot-dip Zn-5Al alloy coated steel wire for bridge cables

在线全文

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research International 2023年第10期30卷 2101-2110页

作者： Xiao-xiong Zhu Yi-fu Shen cheng-tao li Xiang Dai Guo-hao Xiao College of Materials Science and Technology Nanjing University of Aeronautics and Astronautics(NUAA)Nanjing 211106JiangsuChina Jiangsu Tokyo Rope Co. Ltd.Jiangyin 214425JiangsuChina Nanjing Vocational University of Industry Technology Nanjing 210023JiangsuChina

The effects of the content of rare earth elements on the microstructure and properties of hot-dip Zn-5 Al alloy steel wire for bridge cables were *** microstructure of the hot-dip coating was analyzed using an optical microscope and a scanning electron microscope equipped with an energy-dispersive *** bonding force between the hot-dip coating and steel wire was determined by the winding *** corrosion resistance of the steel wire hot-dip coating was tested by the electrochemical *** hot-dip Zn-5A1 alloy coating has a corrosion-resistant structure composed of a zinc-rich phase and an aluminum-rich *** to the enhanced bonding force,the micro structure of the hot-dip coating of the Zn-5A1 alloy with rare earth elements is more compact and uniform than that without rare earth *** addition of rare earth elements improves the corrosion resistance of Zn-5A1 alloy coated steel *** to the rare earth segregation,which prevents the corrosion of the grain boundary and enhances the anti-intergranular corrosion performance,steel wire exhibits the optimum corrosion resistance when the content of rare earth elements is 0.08 wt.%.

关键词： Bridge cable steel wire Hot dipping Rare earth content Corrosion resistance Microstructure

Prospective use of skin-derived precursors in neural regeneration

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Medical Journal 2012年第24期125卷 4488-4496页

作者： LU Xiao-cheng tao Yi li li-xin Department of Neurosurgery First Affiliated Hospital of Nanjing Medical University Nanjing Jiangsu 210029 China

Objective To review recent studies concerning the origins of skin-derived precursors （SKPs）, their differentiation characteristics, and their potential application in neural regenerative medicine. Data sources Data were retrieved from studies reported in PubMed published between April, 1974 and June, 2012. The search terms used were ＂skin-derived precursors＂, ＂stem cells＂, and ＂neural diseases＂. Study selection Articles were included in the review if they were relevant to SKPs as stem cells, as well as their applications in neural regenerative medicine, such as in the treatment of spinal cord injury, Parkinson＇s disease, spinal muscular atrophy and Shah-Waardenburg syndrome. Results SKPs are a novel population of neural crest-derived precursors that arise during embryogenesis and persist into adulthood. They can generate both neural cells and mesodermal lineage cells （including smooth muscle cells and adipocytes）. Compared with other stem cells, SKPs are abundant in adult skin, can differentiate easily into neural cells, and are not associated with any ethical controversies. Conclusion SKPs may provide an alternative source of stem cells to embryonic stem cells for transplantation therapy for neurological diseases.

关键词： skin neural crest stem cells cell transplantation neural regeneration

Physical modeling and spectrum spread analysis of surface clutter in forward scattering radar

在线全文

学校读者我要写书评

暂无评论

Science China(Information Sciences) 2010年第11期53卷 2310-2322页

作者： LONG Teng, HU cheng, ZENG tao & li Xiaoliang Radar Research Laboratory, Department of Electronic Engineering, Beijing Institute of Technology, Beijing 100081, China Radar Research Laboratory Department of Electronic Engineering Beijing Institute of Technology Beijing China

In this paper, based on the processing results of measured clutter data in forward scattering radar, a special phenomenon that the clutter spectrum spread is insensitive to the wind speed and carrier frequency is observed. The pendulum model is first time introduced into the physical modeling and formation mechanism analysis of surface clutter, and the quantitative expression of clutter spectrum spread is analytically obtained. Under the assumption of pendulum model, the processing results of measured clutter data agree well with the results of theoretical analysis, which fully verifies the correctness of pendulum model and reveals the formation mechanism of surface clutter spectrum in forward scattering radar. Furthermore, according to the stability of clutter spectrum spread with respect to carrier frequencies and wind speed, the optimal cutofrequencies of clutter filter can be obtained, which establishes the basis for moving target detection and accurate parameters estimation.

关键词： forward scattering radar clutter spectrum pendulum model formation mechanism

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

技术享乐主义价值观批判

教学与研究 2012年第12期 68-73页

作者：程立涛河北师范大学法政学院河北石家庄050024

现代技术在生活领域的广泛应用,一方面促进了日常生活的现代化,提升了人们的愉悦度和幸福指数;另一方面也导致对技术的过度依赖,为技术享乐主义价值观提供了温床。无处不在的新技术的应用,很容易使一些人尤其是青少年沉迷于技术所带来... 详细信息

现代技术在生活领域的广泛应用,一方面促进了日常生活的现代化,提升了人们的愉悦度和幸福指数;另一方面也导致对技术的过度依赖,为技术享乐主义价值观提供了温床。无处不在的新技术的应用,很容易使一些人尤其是青少年沉迷于技术所带来的舒适、便利与快捷,忽视它可能造成的诸多危害,如自我的迷失、对优良生活习俗的侵蚀、拜金主义和享乐主义观念的盛行、共同生活纽带的松弛以及社会的原子化趋势等。必须结合对现代性的深刻反思,理智地分析新技术成果的利弊,重视对青少年价值选择的引导,克服技术对生活的殖民化,实现技术运用与人类进步的内在和谐。

关键词：技术元素欲望享乐主义价值观

在线全文

学校读者我要写书评

暂无评论

转型期社会公德问题的矛盾分析

教学与研究 2006年第7期 23-28页

作者：程立涛河北师范大学法政学院河北石家庄050091

按照矛盾分析法的理论考察,我国转型期的社会公德问题表现为两对矛盾,即公德规范与个人行为的矛盾、公德需求与公德供给的矛盾,两对矛盾相互依存、相互影响。产生矛盾的社会根源在于,由实践所推动的公共生活拓展、科学技术进步与传统行... 详细信息

按照矛盾分析法的理论考察,我国转型期的社会公德问题表现为两对矛盾,即公德规范与个人行为的矛盾、公德需求与公德供给的矛盾,两对矛盾相互依存、相互影响。产生矛盾的社会根源在于,由实践所推动的公共生活拓展、科学技术进步与传统行为模式及价值观的冲突。实施有效的角色行为教育,推进社会公德制度化以及社区公共生活的开展等,是解决目前社会公德矛盾的主要思路。

关键词：社会公德矛盾分析公共生活角色行为社区建设转型期中国

在线全文

学校读者我要写书评

暂无评论

个人偏好与社会公德

道德与文明 2007年第5期 63-66页

作者：程立涛河北师范大学法政学院副教授河北石家庄050091

个人偏好是人的个性中能够表现出来的比较稳定的特征。社会公德作为全社会的基础道德共识,发挥着调节人际关系、限制和引导个人偏好、维护公共利益的职能。个人偏好的自发性和随意性、自我中心的潜在价值取向、偏离"常规"的行为方式等,... 详细信息

个人偏好是人的个性中能够表现出来的比较稳定的特征。社会公德作为全社会的基础道德共识,发挥着调节人际关系、限制和引导个人偏好、维护公共利益的职能。个人偏好的自发性和随意性、自我中心的潜在价值取向、偏离"常规"的行为方式等,不可避免地导致对公共秩序的侵蚀。适时更新社会公德规范,使其符合人性化的发展要求;适度限制和矫正个人偏好,使其向维护公共秩序的方向发展,有机协调二者的内在冲突,是建设和谐社会的内在要求,也是实现人的全面发展的必然趋势。

关键词：个人偏好社会公德个性行为公共利益

Effect of lamellarization on the microstructure and mechanical properties of marine 10Ni5CrMoV steel

在线全文

学校读者我要写书评

暂无评论

International Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 402-413页

作者： tao Zou Yanwu Dong Zhouhua Jiang Shuyang Du Yushuo li School of Metallurgy Northeastern UniversityShenyang 110819China Key Laboratory of Rolling and Automation Northeastern UniversityShenyang 110819China Key Laboratory for Ecological Metallurgy of Multimetallic Ores(Ministry of Education) Northeastern UniversityShenyang 110819China

Multistage heat treatment involving quenching(Q),lamellarizing(L),and tempering(T)is applied to marine 10Ni5CrMoV *** microstructure and mechanical properties were studied by multiscale characterizations,and the kinetics of reverse austenite transformation,strain hardening behavior,and toughening mechanism were further *** lamellarized specimens possess low yield strength but high toughness,especially cryogenic *** leads to the development of film-like reversed austenite at the martensite block and lath boundaries,refining the martensite structure and lowering the equivalent grain *** analysis of austenite reversion based on the JMAK model shows that the isothermal transformation is dominated by the growth of reversed austenite,and the maximum transformation of reversed austenite is reached at the peak temperature(750℃).The strain hardening behavior based on the modified Crussard-Jaoul analysis indicates that the reversed austenite obtained from lamellarization reduces the proportion of martensite,significantly hindering crack propagation via martensitic transformation during the *** a consequence,the QLT specimens exhibit high machinability and low yield *** with the QT specimen,the ductile-brittle transition temperature of the QLT specimens decreases from-116 to-130℃due to the low equivalent grain size and reversed austenite,which increases the cleavage force required for crack propagation and absorbs the energy of external load,*** work provides an idea to improve the cryogenic toughness of marine 10Ni5CrMoV steel and lays a theoretical foundation for its industrial application and comprehensive performance improvement.

关键词： 10Ni5CrMoV steel lamellarizing reversed austenite cryogenic toughness ductile-brittle transition temperature