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B(C_2h_5)_3等离子辅助渗硼的研究

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热加工工艺 1999年第4期28卷 16-17页

作者：乔学亮 h.-r.Stock C.Jarms 华中理工大学模具技术国家重点实验室

对新型渗硼剂Ｂ（Ｃ２Ｈ５）３的渗硼工艺进行了研究。结果表明：在正常渗硼工艺条件下，基体表面没有形成连续致密的渗硼层，而是形成了一层数μｍ厚的硼碳层；在间歇渗硼工艺条件下，基体表面形成了一层致密的渗硼层，这是因为通过溅... 详细信息

对新型渗硼剂Ｂ（Ｃ２Ｈ５）３的渗硼工艺进行了研究。结果表明：在正常渗硼工艺条件下，基体表面没有形成连续致密的渗硼层，而是形成了一层数μｍ厚的硼碳层；在间歇渗硼工艺条件下，基体表面形成了一层致密的渗硼层，这是因为通过溅射消除了在渗硼过程中沉积在基体表面的硼碳层。

关键词： PACVD 间歇渗硼 B(C2h5)3 渗硼

ISOTh.rMAL SECTION OF Mg-Zn-La SYSTEM IN Mg rICh COrNEr AT 350℃

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Acta metallurgica Sinica(English Letters) 2008年第5期21卷 329-335页

作者： M.L. huang h.X. Li h. Ding Y.P. ren S.M. hao School of Materials and metallurgy Northeastern University Shenyang 110004 China

Alloys of Mg-Zn-La system in Mg rich corner at 350℃ have been prepared in this study. Scanning electron microscopy （SEM）, electron probe microanalysis with energy dispersive X-ray spectroscopy （EPMA-EDS）, and X-ray diffraction （XrD） have been used to identify the phase equilibrium and the composition of each phase in the alloys. As a result, the isoth.rmal section of Mg-Zn-La system in Mg rich corner at 350℃ has been determined. The result shows that, in addition to some binary phases, th.re exists a linear ternary compound called T-phase in Mg-Zn-La system at 350℃, in which the La content is about 8 at. pct ±0.4 at. pct and the Zn content is 8 at. pct- 48 at. pct. The T-phase has a C-centered orth.rhombic crystal structure, and the lattice parameters are a=0.965-1.020 nm, b=1.121 1.142 nm, c=0.950-0.977 nm.

关键词： Mg-Zn-La system Phase equilibrium T-phase Isoth.rmal section

Enhanced cavitation erosion resistance of a friction stir processed high entropy alloy

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International Journal of Minerals,metallurgy and Materials 2020年第10期27卷 1353-1362页

作者： rakesh B.Nair h.S.Arora h.rpreet Singh Grewal Surface Science and Tribology Lab Department of Mechanical EngineeringShiv Nadar UniversityGautam Buddha NagarUttar Pradesh 203207India

Friction stir processing of an Al0.1CoCrFeNi high entropy alloy(hEA)was performed at controlled cooling conditions(ambient and liquid submerged).Microstructural and mechanical ch.racterization of the processed and as-cast hEAs was evaluated using electron backscatter diffraction,micro-h.rdness testing and *** under the submerged cooling condition showed elongated grains(10μm)with fine equiaxed grains(2μm)along the boundary compared to the coarser grain(~2 mm)of as-cast *** h.rdness showed remarkable improvements with four(submerged cooling condition)and three(ambient cooling condition)times that of as-cast hEA(hV^150).The enhanced h.rdness is attributed to the significant grain refinement in the processed *** erosion behavior was observed for samples using an ultrasonication *** of the hEAs showed better cavitation erosion resistance than the stainless steel *** sample processed under a submerged liquid condition showed approximately 20 and 2 times greater erosion resistance than stainless steel 316L and ascast hEA,*** enhanced erosion resistances of the processed hEAs correlate to their increased h.rdness,resistance to plasticity,and better yield strength than the as-cast *** surface of the tested samples showed nucleation and pit growth,and plastic deformation of the material followed by fatigue-controlled disintegration as the primary material removal mechanism.

关键词： cavitation erosion microstructure mechanical properties surface engineering

The magnetic properties of diluted CoFe_2O_4 nanomaterials

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Chinese Physics B 2012年第4期21卷 513-518页

作者： r.Masrour M.hamedoun A.Benyoussef Laboratory of Materials ProcessesEnvironment and QualityCady Ayyed UniversityNational School of Applied SciencesRoute Sidi Bouzid-BP 6346000 SafiMorocco LMPhE(UrAC 12) Facultédes SciencesUniversitéMohamed V-AgdalRabatMorocco Institute for Nanomaterials and Nanotechnologies RabatMAScIRMorocco Academie hassanⅡdes Sciences et Techniques RabatMorocco Academie hassanⅡdes Sciences et Techniques RabatMorocco

The magnetic properties of （Cox Fe1-x）A （Zn1-x Fe1＋x）B O4 are studied using mean-field theory and the probability distribution law to obtain the saturation magnetization, the coercive field, the critical temperature, and the exchange interactions with different values of D （nm） and x. high-temperature series expansions （hTSEs） combined with the Pade approximant are used to calculate the critical temperature of （CoxFe1-x）A（Znl-xFe1＋x）BO4, and the critical exponent associated with magnetic susceptibility is obtained.

关键词： (CoxFe1-x)a(Zn1-xFe1+x)BO4 probability law saturation magnetization coercive field high-temperature series expansions

瑞士马铃薯晚疫病监测及决策支持系统PhytoPrE + 2000在网络上的实现(英文)

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河北农业大学学报 2001年第2期24卷 38-43页

作者： FOrrEr h.r STEENBLOCK T FrIED P M 瑞士联邦农业生态和农业研究所生态农业系统研究组瑞士苏黎世CH-8046

1990年以来 ,瑞士在全国范围内保留了一些不经防治的马铃薯田并设立了晚疫病监测网。商品生产基地马铃薯晚疫病的首次侵染信息被用来指导防治区域性病害。近 12年期间 ,有 10年晚疫病始发于 5月份 ,其中 9年是由保护地扩散到大田的。从 ... 详细信息

1990年以来 ,瑞士在全国范围内保留了一些不经防治的马铃薯田并设立了晚疫病监测网。商品生产基地马铃薯晚疫病的首次侵染信息被用来指导防治区域性病害。近 12年期间 ,有 10年晚疫病始发于 5月份 ,其中 9年是由保护地扩散到大田的。从 2 0 0 1年起 ,农民们能够在网络上得到PhytoPrE +2 0 0 0决策支持系统的服务。系统的核心是国家范围晚疫病发生的实际状态、过去及未来的天气预报资料。用晚疫病菌侵染和产孢所需的关键性气象条件 (MISP)来衡量未来天气状况的满足程度。自 1996年至 2 0 0 0年 ,MISP模型被用来指导田间晚疫病的防治。与PhytoPrE +95相比 ,在多雨年份防治次数未能减少 ,但是在干旱年份能节省 40 %以上的药剂使用。在田间试验当中 ,MISP模型在指导首次用药方面与PhytoPrE +95不相上下 ,在连续用药方面优于其它决策支持系统。在 1999年和 2 0 0 0年 ,MISP模型被整合到PhytoPrE +2 0 0 0决策支持系统。为了使信息快速传递 ,采用了网络技术。PhytoPrE+2 0 0 0是一个针对特定区域和特定地块并集建议、信息和预警为一体的决策支持系统。每日的实际病害发生图以及通过MISP预测的晚疫病发生预警图能够通过网络显示给瑞士所有马铃薯种植户。

关键词：马铃薯晚疫苗疫霉决策支持系统瑞士网络技术

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云南

云南

Discrete Improved Grey Wolf Optimizer for Community Detection

2017年

作者：（英）h. r. 戴维斯

本书是一本译著，讨论了1895-1900年英国在云南修建铁路的可行性。全书主要内容为云南几乎所有的重要线路基本情况。考察人员在几年时间里攀山越岭，不辞劳苦，跨越了5500英里，考察了云南几乎所有的重要线路，而且对所经之处的民族、... 详细信息

ISBN: (纸本)9787548231745

本书是一本译著，讨论了1895-1900年英国在云南修建铁路的可行性。全书主要内容为云南几乎所有的重要线路基本情况。考察人员在几年时间里攀山越岭，不辞劳苦，跨越了5500英里，考察了云南几乎所有的重要线路，而且对所经之处的民族、风俗、气候、物产、语言等都做了认真的记录。

关键词：铁路运输交通运输史史料云南 1895~1900

来源：汇雅图书（南通市图书馆... 评论

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Journal of Bionic Engineering 2023年第5期20卷 2331-2358页

作者： Mohammad h.Nadimi-Shahraki Ebrahim Moeini Shokooh Taghian Seyedali Mirjalili Faculty of Computer Engineering Najafabad BranchIslamic Azad UniversityNajafabad***Iran Big Data research Center Najafabad BranchIslamic Azad UniversityNajafabad***Iran Centre for Artificial Intelligence research and Optimisation Torrens UniversityBrisbane4006Australia Yonsei Frontier Lab Yonsei UniversitySeoulSouth Korea

Detecting communities in real and complex networks is a highly contested topic in network *** many metaheuristic-based algorithms for community detection have been proposed,they still cannot effectively fulfill large-scale and real-world ***,this paper presents a new discrete version of the Improved Grey Wolf Optimizer(I-GWO)algorithm named DI-GWOCD for effectively detecting communities of different *** the proposed DI-GWOCD algorithm,I-GWO is first armed using a local search strategy to discover and improve nodes placed in improper communities and increase its ability to search for a better *** a novel Binary Distance Vector(BDV)is introduced to calculate the wolves’distances and adapt I-GWO for solving the discrete community detection *** performance of the proposed DI-GWOCD was evaluated in terms of modularity,NMI,and the number of detected communities conducted by some well-known real-world network *** experimental results were compared with the state-of-the-art algorithms and statistically analyzed using the Friedman and Wilcoxon *** comparison and the statistical analysis show that the proposed DI-GWOCD can detect the communities with high.r quality than oth.r comparative algorithms.

关键词： Community detection Complex network Optimization metaheuristic algorithms Swarm intelligence algorithms Grey wolf optimizer algorithm

hybridized Nano-Structure Composed of metal and Polydiacetylene

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复旦学报（自然科学版） 2005年第5期44卷 821-822页

作者： h. Oikawa A. Masuh.rat T. Onodera h. Kasai h. Nakanishi Nanomaterials Lab. National Institute for Materials Science Tsukuba 305 - 0044 Japan IMrAM Tohoku University Sendai 980 - 8577 Japan CrEST Japan Science and Technology Agency Tokyo 110-0015 Japan

Polydiacetylene (PDA) is one of the promising candidates for organic th.rd-order nonlinear optical (NLO) material, due to fast optical responsibility and easy processability in comparison with semiconductors etc. The magnitude of NLO property, however, is not still sufficient for the devices applications. Neeves, et al[1] theoretically predicted the enhancement of NLO property for core-shell type hybridized nanocrystal (NC) composed of PDA and metal. In the present study, we have prepared the two kinds of core-shell type hybridized nano-structure, and investigated their optical properties.

关键词：金属纳米结构聚乙烯丁二炔纳米晶体表面胞质基因

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新中国式摩登

中国黄金珠宝 2009年第1期 98-99页

作者： U&me U&me

2008中国的浪漫、唯美不只是北京奥运会的开、闭幕式。没有哪个元素比“中国”在今年更获得世界的热捧，在世界这个最长的“T台”上，难道不是中国最精彩？

关键词：中国式北京奥运会闭幕式世界