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Synthesis of Size-Controllable NiCo2S4 Hollow Nanospheres Toward Enhanced Electrochemical Performance

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Energy & Environmental Materials 2020年第3期3卷 421-428页

作者： Lei Zhang Haitao Zhang Xiang Chu Fangyan Liu chunsheng guo Weiqing Yang Key Laboratory of Advanced Technologies of Materials(Ministry of Education) School of Materials Science and EngineeringSouthwest Jiaotong UniversityChengdu 610031China School of Physic Science&Technology Superconductivity and New Energy R&D CenterSouthwest Jiaotong UniversityChengdu Sichuan 610031China State Key Laboratory of Traction Power Southwest Jiaotong UniversityChengdu 610031China

Although the synthesis of novel nanostructured metal sulfides has been well established,further size-controllable optimization is still valuable to enhance their performance for various ***,a self-template method to size-controllably synthesize the hollow NiCo2S4 nanospheres is *** monodisperse Ni Co precursors with diameter widely ranging from 97 to 550 nm are controllably synthesized and subsequently transformed into hollow NiCo2S4 nanospheres through in situ *** nanoparticles’diameter results in the hollow NiCo2S4 nanospheres larger surface area and thinner shell thickness and hence provides much more electrochemical active sites as well as facilitate the ion and electron ***,the hollow NiCo2S4 nanospheres—used as the electrode materials in supercapacitors—achieve 19%enhancement of specific capacity from 484.8 to 575.1 C g-1 through lowering the 42.5%diameter of hollow NiCo2S4 nanospheres from 407 to 234 ***,the hollow NiCo2S4 nanospheres with 234 nm diameter exhibit superior rate capacity indicated by 49%capacity retention from 1 to 50 A g-1 and excellent cycling stability(77%after 2000 cycles).Furthermore,this method is a potentially general strategy in the size-controllable synthesis of the metal sulfides hollow nanostructures and results in the remarkable electrochemical applications.

关键词： nickel-cobalt sulfides self-template method size-controllable supercapacitor

Sonar Image Registration and Mosaic Based on Line Detection and Triangle Matching

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Instrumentation 2020年第2期7卷 20-35页

作者： LIU Tao ZHANG Xuguang WANG Yuxi FANG Yinfeng guo chunsheng School of Communication Engineering Hangzhou Dianzi UniversityHangzhouChina

Image registration is an important research topic in the field of computer vision,in which the registration and mosaic of side-scan sonar images is the keypoints of underwater ***,the image registration method of keypoints is not suitable for sonar images which do not have obvious feature ***,a method of sonar-image registration and mosaic based on line segment extraction and triangle matching is proposed in this ***,in order to extract features from sonar image,the LSD method is introduced to detect line feature from images,and line segments are filtered by the principle of attention;after that,triangles are formed from line segments,an image transformation matrix can be calculated through the heuristic greedy algorithm from these triangles;finally,images are merged based on the transformation *** the basis of practical tests,it is found that,the feature extraction method used in this paper can better describe the outline of underwater terrain,and there is no obvious stitching gap between the result of sonar images *** results show that the proposed method is effective than the keypoints method of the registration and mosaic of sonar images.

关键词： Sonar Image Image Registration Line Segment Detector Triangle Matching

Highly efficient flexible structured metasurface by roll-to-roll printing for diurnal radiative cooling

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eLight 2023年第1期3卷 45-56页

作者： Keng-Te Lin Xianbo Nian Ke Li Jihong Han Nan Zheng Xiaokang Lu chunsheng guo Han Lin Baohua Jia Centre for Atomaterials and Nanomanufacturing(CAN) School of ScienceRMIT UniversityMelbourneVIC 3000Australia Centre for Translational Atomaterials Faculty of ScienceEngineering and TechnologySwinburne University of TechnologyP.O.Box 218HawthornVIC 3122Australia School of Mechanical Electrical&Information EngineeringShandong UniversityWeihai 264209ShandongChina Suzhou Research Institute Shandong UniversitySuzhou 215123JiangsuChina The Australian Research Council(ARC)Industrial Transformation Training Centre in Surface Engineering for Advanced Materials(SEAM) RMIT UniversityMelbourneVIC 3000Australia

An ideal radiative cooler requires accurate spectral control capability to achieve efficient thermal emission in the atmospheric transparency window(8-13μm),low solar absorption,good stability,scalability,and a simple structure for effective diurnal radiative *** cooling films made from polymer relying on polymer intrinsic absorbance represent a cost-effective solution but lack accuracy in spectral ***,we propose and demonstrate a metasurface concept enabled by periodically arranged three-dimensional(3D)trench-like structures in a thin layer of polymer for high-performance radiative *** structured polymer metasurface radiative cooler is manufactured by a roll-to-roll printing *** exhibits superior spectral breadth and selectivity,which offers outstanding omnidirectional absorption/emission(96.1%)in the atmospheric transparency window,low solar absorption(4.8%),and high *** cooling power of 129.8 W m^(-2) and temperature deduction of 7℃ on a clear sky midday have been achieved,promising broad practical applications in energy saving and passive heat dispersion fields.

关键词： Radiative cooling Metasurface Roll-to-roll printing Energy saving

Bipolar Resistive Switching Effect in BiFeO_3/Nb:SrTiO_3 Heterostructure by RF Sputtering at Room Temperature

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Journal of Wuhan University of Technology(Materials Science) 2018年第6期33卷 1360-1364页

作者： WANG Pcngfei ZHU Hui Faculty of Information Technology Beijing University of Technology National Engineering Research Center for Optoelectronics Devices Institute of Semiconductors Chinese Academy of Sciences

The(001) oriented BiFeO_3 thin film was deposited on the Nb: SrTiO_3 substrate by radio frequency magnetron sputtering technology, and the bipolar resistive switching effect was observed in the BiFeO_3/Nb: SrTiO_3 heterostructure. The results showed that the ratio between the high resistance and low resistance was more than two orders at a reading pulse of-0.5 V and it exhibited excellent retention over 3600 s. The current density-voltage characteristic was dominated by the space-charge-limited conduction. The resistive switching effect of the structure was attributed to the trapping/detrapping of the charge carriers.

关键词： BiFeO3 films sputter bipolar resistive switching space-charge-limited conduction

Two-Stream Numerical Simulation of a New Type Drum Dryer

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Journal of Applied Mathematics and Physics 2019年第8期7卷 1606-1624页

作者： Fengjian Chu Yaokuan Zhang Qian Lin Xuan Zhou chunsheng guo School of Mechanical Electronic & Engineering Shandong University at Weihai Weihai China

In recent years, the new type of tumble waste dryer has been promoted and developed. Heat generation through phase transition is an environmental, friendly and efficient heat transfer drying method. In order to know under what conditions the water vapor has higher heat transfer efficiency in the semi-circular cylinder and more sufficient liquid phase transition, and under what conditions the quantity of heat transferred can be exactly controlled, we carried out relevant work. Based on the analysis of two-phase heat transfer of rotating body, a three-dimension model of garbage dryer is established. Then, the commercial CFD software ANSYS Fluent is used to simulate the two-phase flow in the semi-circular cylinder, and the simulation calculation is carried out. Finally, the theoretical calculation results are verified by experiments. Calculated by the simulation results analysis: according to the industrial use of setting conditions, simulation calculation results can achieve convergence, namely water vapor through the pipe wall heat conduction. Finally condense into liquid water, and to ensure that the liquid cavity in the body has a higher volume fraction, water vapor phase change rate is of more than 90%, the Nusselt number of the heat transfer surface is 60 to 300.

关键词： Dryer Two-Phase Flow Model Roller Type Heat Transfer

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论二战后社会主义改革的开端

当代世界与社会主义 2020年第1期 59-64页

作者：郭春生中国人民大学国际关系学院

二战结束后,随着新科技革命时代的到来和人类对和平幸福生活的向往,受到苏联强大影响的东欧国家一方面接受苏联社会主义模式,另一方面又普遍存在着对苏联社会主义模式的改革要求。在东欧国家中,南斯拉夫最早接受苏联模式,却又在内外因... 详细信息

二战结束后,随着新科技革命时代的到来和人类对和平幸福生活的向往,受到苏联强大影响的东欧国家一方面接受苏联社会主义模式,另一方面又普遍存在着对苏联社会主义模式的改革要求。在东欧国家中,南斯拉夫最早接受苏联模式,却又在内外因素的作用下最早开始了对苏联模式的改革。南斯拉夫改革开启了二战后世界社会主义改革的进程。

关键词：苏联社会主义模式东欧南斯拉夫社会主义改革

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吉拉克凝析气田地面工艺技术

天然气工业 2005年第10期25卷 127-129页

作者：郭春生中国石油天然气集团公司辽河石油工程有限公司

吉拉克气田位于新疆轮台县境内,是中国石油塔里木油田分公司早期发现的高压、高产凝析气田,油气资源比较丰富,是'西气东输'工程的主要气源之一.在概述吉拉克凝析气田地面工程基本情况的基础上,详细介绍了凝析气的集输工艺、制冷回收轻... 详细信息

吉拉克气田位于新疆轮台县境内,是中国石油塔里木油田分公司早期发现的高压、高产凝析气田,油气资源比较丰富,是'西气东输'工程的主要气源之一.在概述吉拉克凝析气田地面工程基本情况的基础上,详细介绍了凝析气的集输工艺、制冷回收轻烃和凝析油稳定工艺,并列出了单位能耗指标.经过多方案比较最终确定:①集气部分采用适当高压保温集输或加热节流后集输进站,合理利用压力能可以保证站内凝析气处理时最大限度的节能;②石炭系和三叠系凝析气采用分别处理的生产工艺;③合理确定丙烷收率为85%,既有良好的经济效益又可节约能源.该工程于2005年5月1～9日一次投产成功,已创造了可观的经济和社会效益.

关键词：轮台吉拉克凝析气田地面工程工艺技术轻烃回收低温分离节流制冷凝析气田

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论“布拉格之春”对苏联内政的影响

俄罗斯东欧中亚研究 2002年第3期 74-79+96页

作者：郭春生中国社会科学院研究生院

“布拉格之春”这一发生在捷克斯洛伐克的改革事件与赫鲁晓夫的非斯大林化的改革及柯西金的“新经济体制”改革同根同源 ,都是冲击斯大林模式的重要尝试。“布拉格之春”及苏联的出兵镇压对苏联内政产生了重大影响 :它使得苏联反改革力... 详细信息

“布拉格之春”这一发生在捷克斯洛伐克的改革事件与赫鲁晓夫的非斯大林化的改革及柯西金的“新经济体制”改革同根同源 ,都是冲击斯大林模式的重要尝试。“布拉格之春”及苏联的出兵镇压对苏联内政产生了重大影响 :它使得苏联反改革力量占了优势 ,停止了“新经济体制”改革的步伐 ;它还使得苏联由“三驾马车”的集体领导体制走向了勃列日涅夫的个人集权政治 ;同时 ,它使苏联的意识形态领域走向全面保守 ,空洞的意识形态宣传代替了理论上的探索。苏联出兵镇压“布拉格之春”是苏联走向全面停滞的重要转折点。

关键词： “布拉格之春” 勃列日涅夫集权停滞

列宁领导布尔什维克党建立新型苏维埃国家的伟大创举

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当代世界与社会主义 2024年第2期 31-38页

作者：郭春生山东大学当代社会主义研究所

从创建布尔什维克党开始,列宁就把在俄国建立新型国家作为党的重大使命。在列宁的建党思想指导下,布尔什维克党逐渐成长为一个具有强大行动力和执行力的无产阶级革命型政党。在1917年二月革命后,列宁进一步创新他的以党建国思想,引导布... 详细信息

从创建布尔什维克党开始,列宁就把在俄国建立新型国家作为党的重大使命。在列宁的建党思想指导下,布尔什维克党逐渐成长为一个具有强大行动力和执行力的无产阶级革命型政党。在1917年二月革命后,列宁进一步创新他的以党建国思想,引导布尔什维克党发动并取得十月革命的胜利,创建了新型苏维埃国家。布尔什维克党领导国家的体制凝聚了巨大的力量,不仅在短短几年内巩固了新生的国家政权,而且开创了社会主义改革的道路。

关键词：列宁布尔什维克党以党建国苏维埃