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Efficient acetylene/carbon dioxide separation with excellent dynamic capacity and low regeneration energy by anion-pillared hybrid materials

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Frontiers of Chemical Science and Engineering 2022年第11期16卷 1616-1622页

作者： Yijian Li Jianbo Hu Jiyu Cui Qingju Wang Huabin Xing Xili Cui Zhejiang Key Laboratory of Smart Biomaterials Key Laboratory of Biomass Chemical Engineering of Ministry of EducationCollege of Chemical and Biological EngineeringZhejiang UniversityHangzhou 310027China ZJU-Hangzhou Global Scientific and Technological Innovation Center Hangzhou 311215China

Adsorptive separation of acetylene/carbon dioxide mixtures by porous materials is an important and challenging task due to their similar sizes and physical properties.Here,remarkable acetylene/carbon dioxide separation featuring a high dynamic breakthrough capacity for acetylene(4.3 mmol·g^(–1))as well as an ultralow acetylene regeneration energy(29.5 kJ·mol^(–1))was achieved with the novel TiF_(6)^(2–)-pillared material ZU-100(TIFSIX-bpy-Ni).Construction of a pore structure with abundant TiF_(6)^(2–)anion sites and pores with appropriate sizes enabled formation of acetylene clusters through hydrogen bonds and intermolecular interactions,which afforded a high acetylene capacity(8.3 mmol·g^(–1))and high acetylene/carbon dioxide uptake ratio(1.9)at 298 K and 1 bar.Moreover,the NbO_(5)^(2–)anion-pillared material ZU-61 investigated for separation of acetylene/carbon dioxide.In addition,breakthrough experiments were also conducted to further confirm the excellent dynamic acetylene/carbon dioxide separation performance of ZU-100.

关键词： acetylene carbon dioxide separation dynamic capacity anion-pillared hybrid material

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Optimal Design of Tapered Roller Bearings Based on Multi⁃Physics Objectives Using Evolutionary Algorithms

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Journal of Harbin Institute of Technology(New Series) 2023年第1期30卷 73-84页

作者： Rajiv Tiwari Rahul M.P.Chandran Department of Mechanical Engineering Indian Institute of Technology GuwahatiGuwahati 781039India

Rolling element bearing is the most common machine element in rotating machinery.An extended life is among the foremost imperative standards in the optimal design of rolling element bearings,which confide on the fatigue failure,wear,and thermal conditions of bearings.To fill the gap,in the current work,all three objectives of a tapered roller bearing have been innovatively considered respectively,which are the dynamic capacity,elasto-hydrodynamic lubrication(EHL)minimum film⁃thickness,and maximum bearing temperature.These objective function formulations are presented,associated design variables are identified,and constraints are discussed.To solve complex non⁃linear constrained optimization formulations,a best⁃practice design procedure was investigated using the Artificial Bee Colony(ABC)algorithms.A sensitivity analysis of several geometric design variables was conducted to observe the difference in all three objectives.An excellent enhancement was found in the bearing designs that have been optimized as compared with bearing standards and previously published works.The present study will definitely add to the present experience based design followed in bearing industries to save time and obtain assessment of bearing performance before manufacturing.To verify the improvement,an experimental investigation is worthwhile conducting.

关键词： dynamic capacity evolutionary algorithm optimum design tapered roller bearings temperature tolerance analysis

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Obstacles to the Success of Organizational and Managerial Innovation in Construction SMEs in Burkina Faso

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Journal of Modern Accounting and Auditing 2020年第12期16卷 542-554页

作者： Some Lucain Universite Aube Nouvelle OuagadougouBurkina Faso

This research is based on a qualitative approach based on the exploitation of secondary data.The objective of the research is to determine the factors likely to influence the success of innovation in small and medium enterprises(SMEs)of Building and Public Works(BTP)in Burkina Faso.To do this,we issued two research proposals that served as a guide for our research.It emerged that 77% of SMEs reported having innovated in 2019,while the same study concluded to the underperformance of these companies.Hence,there is the need to distinguish between innovation actions and the success of innovation.For us,the success of innovation is based on information transparency in the company and the development of human resources.The results showed that the information does not circulate the construction companies and it results in a lack of meeting place.In addition,construction and civil engineering SMEs lack competent and qualified staff and are not very motivated.Indeed,only 52% of business leaders are satisfied with the motivation of their staff.In terms of competence,97% business leaders say that they have qualified staff and even 87% say not to delegate because they lack qualified staff.In fact,obtaining approval requires the existence of qualified personnel in the company,which justifies this assertion to 97%.And yet,the staff presented for the approval is not the one available in the company.Moreover,the lack of competent and motivated staff is confirmed by the MOE and MOD.Our two research proposals have been validated.However,we noted that this is a partial search for the factors that influence the success of innovation in construction SMEs that could be complemented by other research.

关键词： construction and civil engineering SMEs organizational and managerial innovation dynamic capacity

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酒店如何在制度环境变迁中构建动态能力

旅游管理

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旅游管理 2021年第5期

作者：李浩铭曾国军张家旭杨学儒刘博

现有研究多聚焦于动态能力对产品架构和组织操作常规的影响，对制度环境变迁如何影响酒店动态能力形成的内在机理以及管理者推动动态能力建构的过程机制缺乏系统讨论。该文以东莞著名五星级酒店美思威尔顿为案例研究对象，构建制度环境... 详细信息

现有研究多聚焦于动态能力对产品架构和组织操作常规的影响，对制度环境变迁如何影响酒店动态能力形成的内在机理以及管理者推动动态能力建构的过程机制缺乏系统讨论。该文以东莞著名五星级酒店美思威尔顿为案例研究对象，构建制度环境变迁推动酒店动态能力的关系模型，剖析了酒店动态能力构建的内在逻辑和演变机理。文章从外部正式制度环境、外部非正式制度环境、内部正式制度环境和内部非正式制度环境4个方面诠释了动态能力构建过程。研究发现：(1)制度环境变迁下的酒店业应根据不同的制度环境，结合自身发展特点，进行战略澄清与拆解从而各个击破，构建适应性战略模式；(2)在酒店动态能力的构建过程中，企业家精神与创新意识是有序不紊经营的根本动力；(3)面对制度环境逆境，酒店业不仅需要重构自身内外部资源，还应重视各方利益相关者诉求，解决社会问题，共同抵御冲击，推动企业持续成长。这无疑对处于制度环境变迁中的中国酒店企业成长和发展提供了新的洞见。

关键词：制度环境变迁动态能力中国情境战略管理　　institutional environment change dynamic capacity Chinese context strategic management

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