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掺烧二代生物柴油对船用柴油机性能的影响研究

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广州航海学院学报 2024年第2期32卷 33-38页

作者：胡哲彰高占斌施炜彬集美大学轮机工程学院福建厦门361021 福建省船舶与海洋工程重点实验室福建厦门361021 福建省能源材料科学与技术(嘉庚)创新实验室福建厦门361102

基于TBD234V6型船用增压柴油机,运用GT-Power软件建立其仿真模型,设立推进特性25%、50%、75%、100%负荷率4个工况点,在各工况下对纯柴油和10%、20%、30%、40%共5组二代生物柴油掺混比进行仿真模拟研究,探究不同掺混比例二代生物柴油对... 详细信息

基于TBD234V6型船用增压柴油机,运用GT-Power软件建立其仿真模型,设立推进特性25%、50%、75%、100%负荷率4个工况点,在各工况下对纯柴油和10%、20%、30%、40%共5组二代生物柴油掺混比进行仿真模拟研究,探究不同掺混比例二代生物柴油对船用柴油机性能的影响.研究显示随着二代生物柴油掺混比的升高,柴油机的动力性和经济性得到提升,排放性能中的NO_(x)排放下降.该仿真研究可以为之后二代生物柴油在船用发动机上的实际测试提供一定参考.

关键词：船用柴油机 GT-POWER 二代生物柴油性能影响

Non-metallic inclusions in electroslag remelting:a review

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Journal of Iron and Steel Research International 2021年第12期28卷 1483-1503页

作者： Cheng-bin shi shi-jun Wang Jing Li Jung-wook Cho Institute of Advanced Steel State Key Laboratory of Advanced MetallurgyUniversity of Science and Technology Beijing(USTB)Beijing100083China Graduate Institute of Ferrous and Energy Materials Technology Pohang University of Science and Technology(POSTECH)Pohang790-784Republic of Korea

Non-metallic inclusion in electroslag remelting is a constant topic that has been studied for *** results and conclusions are obtained on some of the subjects from these previous *** differences originate in part from different experimental conditions,including original inclusion chemistries in consumable electrode,slag composition,oxygen level,liquid metal compositions,deoxidation schemes,and melting rates of electroslag *** advances in the operating practices of inclusion control in electroslag remelting production are *** evolution during the electroslag remelting and related processing parameters are also reviewed and *** role of the reoxidation of liquid steel during electroslag remelting on oxide inclusion composition is *** generation of inclusions in remelted ingot is critically *** and remaining issues are noted.

关键词： Non-metallic inclusion Electroslag remelting Inclusion removal Reoxidation

Progress of remanufacturing engineering and future technology expectation

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Advances in Manufacturing 2013年第1期1卷 8-12页

作者： bin-shi Xu National Key Laboratory for Remanufacturing The Academy of Armored Forces Engineering

After development for decades, abroad remanufacturing has formed a complete industrial system. At present, the research emphases are on marking logistics management and market cultivation theory of remanufacturing products, and so on. The Chinese remanufacturing starts fairly late. After 10 years of development, it formed a remanufacturing mode with Chinese characteristics that is sustained by high-tech industries, using the surface engineering technology to restore the size and improve properties, and combining manufacturing, study and research together. The remanufacturing mode is not only circular but also economic. With the development of science and technology, future remanufacturing technology will break the previous limits, explore and understand the limits of micro machining. It will carry out the waste product remanufacturing in the micro-nano scale, and extend the remanufacturing industry to a more broad space.

关键词： Sustainable development Remanufacturingindustry - Surface engineering - Micro-nano machining

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弹性机翼阵风减缓系统故障影响分析

计算机仿真 2024年第6期41卷 64-70页

作者：杨建忠陈世康杨士斌中国民航大学安全科学与工程学院天津300000 中国民航大学中欧航空工程师学院天津300000

针对弹性机翼阵风响应问题,采用最小状态法近似非定常气动力得到机翼状态空间方程,通过PI控制减缓“1-cos”离散阵风和连续阵风下翼根弯矩响应,考虑舵面卡阻、漂浮、振荡和控制受限四种典型故障模式对于机翼结构完整性的影响。结果表明... 详细信息

针对弹性机翼阵风响应问题,采用最小状态法近似非定常气动力得到机翼状态空间方程,通过PI控制减缓“1-cos”离散阵风和连续阵风下翼根弯矩响应,考虑舵面卡阻、漂浮、振荡和控制受限四种典型故障模式对于机翼结构完整性的影响。结果表明卡阻故障下最大增加28.7%额外载荷;漂浮故障下飞行包线减小影响系统稳定性;振荡故障下最大增加23.7%额外载荷并会影响机翼疲劳寿命;控制受限故障下最大增加1.7%额外载荷,速率受限可能引发系统不稳定。

关键词：阵风响应弹性机翼控制故障分析

烟粉虱MED隐种14-3-3基因克隆及时空表达谱分析

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昆虫学报 2024年第5期67卷 595-602页

作者：韦焕文王培陈建斌杜娇张德咏刘勇史晓斌湖南大学生物学院隆平分院长沙410125 岳麓山实验室长沙410125 湖南省农业科学院植物保护研究所长沙410125

【目的】真核生物中,14-3-3蛋白是一类可与多种蛋白互作的调节蛋白,能够参与信号转导、免疫反应、生长发育和胁迫响应等。本研究旨在克隆烟粉虱Bemisia tabaci MED隐种的14-3-3基因的全长cDNA序列,了解该基因编码的蛋白特征和该基因的... 详细信息

【目的】真核生物中,14-3-3蛋白是一类可与多种蛋白互作的调节蛋白,能够参与信号转导、免疫反应、生长发育和胁迫响应等。本研究旨在克隆烟粉虱Bemisia tabaci MED隐种的14-3-3基因的全长cDNA序列,了解该基因编码的蛋白特征和该基因的时空表达模式。【方法】使用RT-PCR技术克隆烟粉虱MED隐种的14-3-3基因全长cDNA序列,通过生物信息学软件和在线网站分析14-3-3基因的生物学特性;使用RT-qPCR测定14-3-3基因在烟粉虱MED隐种不同发育阶段(卵、1-4龄若虫和成虫)、雌雄成虫以及雌成虫头、胸和腹中的表达量。【结果】克隆并鉴定了烟粉虱MED隐种14-3-3基因的两个亚型:Bt14-3-3 epsilon(GenBank登录号:XM_019046102.1)和Bt14-3-3 zeta(GenBank登录号:XM_019057395.1),开放阅读框(ORFs)分别长771和744 bp,分别编码256和247个氨基酸,编码的蛋白是无跨膜螺旋区和信号肽的亲水性蛋白,其二级结构主要由α旋螺旋组成。系统发育树分析表明,Bt14-3-3 epsilon与褐飞虱Nilaparvata lugens、温带臭虫Cimex lectularius和茶翅蝽Halyomorpha halys的14-3-3 epsilon聚为一支,同源性较高;Bt14-3-3 zeta与褐飞虱的14-3-3 zeta的亲缘关系更近。RT-qPCR结果表明,Bt14-3-3 epsilon和Bt14-3-3 zeta在烟粉虱MED隐种的卵、雌成虫和雌成虫腹部中的表达量较高。【结论】明确了烟粉虱MED隐种14-3-3基因的两个亚型的全长序列、编码蛋白特征及时空表达特点,为后续研究14-3-3蛋白的分子功能奠定了基础。

关键词：烟粉虱基因克隆 14-3-3蛋白生物信息学时空表达

“平台依附”时代的新闻自主：人工智能如何重塑新闻业生态

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未来传播 2024年第5期31卷 24-30+137页

作者：史安斌刘勇亮清华大学新闻与传播学院荷兰阿姆斯特丹大学传播学院

人工智能正在重塑新闻、平台与用户的关系，再造新闻业的未来。基于制度同构的理论视角，对中国、美国、荷兰媒体在2022年11月至2024年3月发布的有关新闻业和人工智能的新闻报道进行主题分析，探索人工智能影响下新闻机构和平台公司的... 详细信息

人工智能正在重塑新闻、平台与用户的关系，再造新闻业的未来。基于制度同构的理论视角，对中国、美国、荷兰媒体在2022年11月至2024年3月发布的有关新闻业和人工智能的新闻报道进行主题分析，探索人工智能影响下新闻机构和平台公司的关系。伴随着人工智能技术的发展，平台公司对新闻机构的控制扩展到了内容、渠道和新闻生产三个层面；同时，新闻机构也通过自建平台、多模态新闻和版权保护的方式展开“去依附”的自救；新闻用户一方面面临着新闻过载的挑战，另一方面也参与了新闻再生产和新闻消费设备的革新。在技术影响下，新闻与平台的关系变革是新闻业参与和抗争制度重构的过程。

关键词：智能传播新闻生产自动化新闻去新闻化制度重构

Properties and strengthening mechanism of brush plated nanoparticle reinforced composite coatings

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中国有色金属学会会刊：英文版 2004年第z1期14卷 182-185页

作者： DONG shi-yun XU bin-shi MA shi-ning TU Wei-yi National Key Laboratory for Remanufacturing Academy of Armored Force Engineering Beijing 100072 China National Key Laboratory for RemanufacturingAcademy of Armored Force Engineering Beijing 100072 China National Key Laboratory for RemanufacturingAcademy of Armored Force Engineering Beijing 100072 China National Key Laboratory for RemanufacturingAcademy of Armored Force Engineering Beijing 100072 China

Nanoparticle reinforced nickel matrix composite coatings, such as n-Al2O3/Ni, n-SiO2/Ni, n-SiC/Ni and n-TiO2/Ni, were fabricated by brush plating technique. Hardness, wear resistance and contact-fatigue resistance of the composite coatings were determined, and strengthening mechanism of the composite coatings was discussed. Results show that the composite coatings have superior properties to the Ni metal coating. Compared with properties of brush plated Ni metal coating, the composite coatings have hardness over 1.5 times and wear resistance capability of about 2.5 times. The strengthening mechanism of the composite coatings mainly includes fine-crystal grain effect, nanoparticle dispersion effect and dislocation effect.

关键词： nanoparticles brush plated coatings strengthening mechanism

Influence of cerium treatment on inclusion modification and as-cast microstructure of high-strength low-alloy steel

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Journal of Iron and Steel Research International 2022年第10期29卷 1659-1668页

作者： Ru-ming Geng Jing Li Cheng-bin shi State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing100083China

The influence of cerium treatment on the inclusion evolution and as-cast microstructure of high-strength low-alloy steel was *** including the inclusions characteristics,element distribution,and the in situ solidification were analyzed by scanning electron microscopy,energy-dispersive spectroscopy,and high-temperature confocal laser scanning microscopy,*** results indicated that,after the addition of Ce,the Al_(2)O_(3) inclusions evolved to form Ce_(2)O_(2)S and CeAlO_(3) inclusions,which exhibited a decrease in size alongside corresponding increase in their number *** equiaxed grain ratio exhibited by the as-cast microstructure increased significantly upon the addition of Ce,while a reduction in the segregation and a corresponding increase in the homogeneity of the carbon distribution within the as-cast microstructure were also *** results of the in situ observation of the solidification suggested that the addition of Ce significantly reduced the solidification temperature range,thus reducing the carbon *** nucleation effect imparted by Al_(2)O_(3),Ce_(2)O_(2)S,and CeAlO_(3) on theδ-Fe formation was discussed in the context of the disregistry theory,which revealed that the formation of a large number of fine Ce_(2)O_(2)S inclusions promotedδ-Fe formation via heterogeneous nucleation.

关键词： Ce treatment Non-metallic inclusion As-cast microstructure In situ observation Disregistry theory

Lifetime prediction and failure analysis of organic coatings by EIS

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中国有色金属学会会刊：英文版 2004年第z1期14卷 455-458页

作者： YAN Rui WU Hang MA shi-ning XU bin-shi Surface Engineering Research Institute of CMES Chinese Mechanical Engineering Society Beijing 100072 China Surface Engineering Research Institute of CMES Chinese Mechanical Engineering Society Beijing 100072 China Surface Engineering Research Institute of CMES Chinese Mechanical Engineering Society Beijing 100072 China Surface Engineering Research Institute of CMES Chinese Mechanical Engineering Society Beijing 100072 China

Organic coatings are widely used to control the corrosion of steel structure. The anticorrosive property of these coatings depends on their barrier properties, making a separation between the corrosive medium and the substrate. But unavoidable completely small pores, cracks and other defects in organic coatings may cause ions, water, gases, and other corrosive species penetrate and distribute in the coatings, causing accumulation and swelling of coatings, so leading to the degradation of coatings. In addition, water affects the permeation of oxygen and other corrosive medium, consequently the presence of such substances at coating-metal interface promotes corrosion of metal substrate. So the absorbability of the coatings to water may be one of the most important factors in undercoating corrosion. In recent years, electrochemical impedance spectroscopy (EIS) has been established and frequently used as a non-destructive testing method for assessing the performance of organic coatings, especially for the determination of the water content in organic coatings, since the capacitance of the coatings is sensitive to the penetration of water. So from EIS it can extract a wealth of information on the electrochemical corrosion of coated steels, especially, it can be utilized to assess organic coatings used under particular surroundings. The principle, methods and application of EIS on evaluating life-span and analyzing failure mechanism of organic coatings are also introduced briefly. Combining other analysis techniques such as XRD, SEM and FTIR with electrochemical technique, it will blaze a way in studying degradation mechanism of organic coatings and estimating their lifetime.

关键词： organic coatings lifetime prediction failure analysis electrochemical impedance spectro scopy