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Recent progress towards mild-condition ammonia synthesis 预览
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作者 Qianru Wang Jianping Guo Ping Chen 《能源化学:英文版》 SCIE EI CAS CSCD 2019年第9期25-36,共12页
Ammonia is essential for food and energy.Industrial ammonia synthesis via Haber–Bosch process is energy-intensive and releases large amount of CO2.Increasing research efforts are devoted to "green"ammonia s... Ammonia is essential for food and energy.Industrial ammonia synthesis via Haber–Bosch process is energy-intensive and releases large amount of CO2.Increasing research efforts are devoted to "green"ammonia synthesis.The present article reviews the recent progress in the fields of thermocatalytic, electrocatalytic, photocatalytic and chemical looping processes for dinitrogen reduction towards ammonia formation and discusses the challenges borne for mild-condition synthesis. 展开更多
关键词 AMMONIA synthesis Thermocatalytic PROCESS ELECTROCATALYTIC PROCESS PHOTOCATALYTIC PROCESS Chemical LOOPING PROCESS
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Process Management in Insurance Companies 预览
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作者 Lech Gasiorkiewicz Marta Kruk 《管理研究:英文版》 2019年第5期486-495,共10页
The importance of insurance activity is constantly growing, generating new problems and setting new challenges. One of these challenges is to meet the growing requirements and expectations of customers. This requires ... The importance of insurance activity is constantly growing, generating new problems and setting new challenges. One of these challenges is to meet the growing requirements and expectations of customers. This requires the efficient management of insurance companies. This means the necessity of applying modern management concepts, first and foremost, the concept of process management and instruments related to this process. This article describes the results of research on process management in insurance companies operating in Poland that was conducted by the Faculty of Management at the Warsaw University of Technology and presents the concept of the identification of processes carried out in insurance companies encompassing management, basic and auxiliary processes, as well as the objectives of the processes and the relationships between the basic processes and other processes carried out in insurance companies. 展开更多
关键词 MANAGEMENT of PROCESSES PROCESS MANAGEMENT PROCESS identification of INSURANCE ACTIVITIES goals of PROCESS implementation RELATIONSHIPS between PROCESSES
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A Tree-valued Markov Process Associated with an Admissible Family of Branching Mechanisms
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作者 Hong Wei BI Hui HE 《数学学报:英文版》 SCIE CSCD 2019年第1期135-160,共26页
Let E■R be an interval. By studying an admissible family of branching mechanisms{ψt,t ∈E} introduced in Li [Ann. Probab., 42, 41-79(2014)], we construct a decreasing Levy-CRT-valued process {Tt, t ∈ E} by pruning ... Let E■R be an interval. By studying an admissible family of branching mechanisms{ψt,t ∈E} introduced in Li [Ann. Probab., 42, 41-79(2014)], we construct a decreasing Levy-CRT-valued process {Tt, t ∈ E} by pruning Lévy trees accordingly such that for each t ∈E, Tt is a ψt-Lévy tree. We also obtain an analogous process {Tt*,t ∈E} by pruning a critical Levy tree conditioned to be infinite. Under a regular condition on the admissible family of branching mechanisms, we show that the law of {Tt,t ∈E} at the ascension time A := inf{t ∈E;Tt is finite} can be represented by{Tt*,t∈E}.The results generalize those studied in Abraham and Delmas [Ann. Probab., 40, 1167-1211(2012)]. 展开更多
关键词 PRUNING ADMISSIBLE FAMILY branching PROCESS random TREE Levy TREE tree-valued PROCESS ascension PROCESS
A controlled, efficient and robust process for the synthesis of an epidermal growth factor receptor inhibitor: Afatinib Dimaleate 预览
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作者 Pawan Kumar Premnath Dhande +7 位作者 Muhammad Taufiq F. Mazlee Suhaila M. Yaman Nurul Syazwani Nadirah Binti Muhammad Syafiq Chandran Mohd Zulfadli Bin Makhtar Dhramveer Singh Shekhawat Sunil Vasudeorao Lanke Ramesh Kumar Sandeep Mhetre 《化学报告(英文)》 2019年第1期3-12,共10页
A simple, controlled, robust and scalable three-stage manufacturing process of Afatinib Dimaleate was assessed and optimized leading to improved yield and quality. The synthetic process involves sequence of reactions ... A simple, controlled, robust and scalable three-stage manufacturing process of Afatinib Dimaleate was assessed and optimized leading to improved yield and quality. The synthetic process involves sequence of reactions as nitro-reduction, amidation and salification. The developed and optimized route was demonstrated on 300 g scale with over all isolated yield of 84% for Afatinib free base. The developed process has the capability to control not only the process related impurities but also the degradation impurities. One new impurity was identified during the process development studies and characterized as acetamide impunity, chemically known as (S)-N-(4-((3-chloro-4-fluorophenyl) amino)-7-((tetrahydrofuran-3-yl) oxy) quinazolin-6-yl) acetamide. Other impurities were identified as degradation impurities, Process impurities and were labeled as 1-(4-((3-chloro-4-fluorophenyl) amino)-7-(((S)-tetrahydrofuran-3-yl) oxy) quinazoline-6-yl)-5-Hydroxypyrrolidin- 2-one (hydroxy impurity), Afatinib N-Oxide impurity and N4-(3-chloro-4-fluorophenyl)-7-[[(3S)-tetrahydro- 3-furanyl] oxy]-4,6-quinazolinediamine (Intermediate-1). 展开更多
关键词 AFATINIB Dimaleate HPLC DEGRADATION IMPURITIES NMR LC-MS new PROCESS IMPURITY improved PROCESS
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车辆辅助系统生产线装配和检测工艺研究 预览
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作者 韦军 杜玉峰 王丽华 《科技创新与应用》 2019年第21期95-97,共3页
随着汽车市场对车辆辅助系统的需求日益增大,汽车厂越来越多的生产线需部署相关的制造工艺。文章围绕车辆辅助系统的零件安装、校准和检测等关键问题进行研究,研究驾驶辅助系统的零件从来料接收到整车下线所涉及的工艺环节,制订生产线... 随着汽车市场对车辆辅助系统的需求日益增大,汽车厂越来越多的生产线需部署相关的制造工艺。文章围绕车辆辅助系统的零件安装、校准和检测等关键问题进行研究,研究驾驶辅助系统的零件从来料接收到整车下线所涉及的工艺环节,制订生产线车辆辅助系统工艺管控办法。 展开更多
关键词 ADAS 工艺流程 装配工艺 下线校准
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Invariant diffusion processes under Lie group actions
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作者 Ming Liao 《中国科学:数学英文版》 SCIE CSCD 2019年第8期1493-1510,共18页
We study a decomposition of a diffusion process in a manifold that is invariant under the action of a Lie group. As applications, we consider a diffusion process in a Euclidean space that is invariant under translatio... We study a decomposition of a diffusion process in a manifold that is invariant under the action of a Lie group. As applications, we consider a diffusion process in a Euclidean space that is invariant under translations in a subspace, and a skew-product in a general setting. 展开更多
关键词 diffusion PROCESS LIE group MARKOV PROCESS
高校一站式服务大厅的流程治理 预览
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作者 魏孔鹏 谷洪彬 李啸龙 《辽宁高职学报》 2019年第9期75-78,87共5页
一站式服务大厅的建设是高校加快推进教育现代化的重要抓手,也是高校推进现代化治理体系建设和提高现代化治理能力的重要组成部分。通过对一站式服务大厅实施流程治理,实现校园业务流程从流程战略、流程设计、流程执行和流程控制的全生... 一站式服务大厅的建设是高校加快推进教育现代化的重要抓手,也是高校推进现代化治理体系建设和提高现代化治理能力的重要组成部分。通过对一站式服务大厅实施流程治理,实现校园业务流程从流程战略、流程设计、流程执行和流程控制的全生命周期管理,促进高校内部机构改革和职能转变,推进高校内涵发展。 展开更多
关键词 一站式服务 流程 流程治理
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The measure of friction angles for different types of granular material
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作者 DEGANUTTI Andrea Maria TECCA Pia Rosella GENEVOIS Rinaldo 《山地科学学报:英文版》 SCIE CSCD 2019年第4期769-777,共9页
The aim of this research is to deepen the knowledge of the role of friction on the dynamics of granular media;in particular the friction angle is taken into consideration as the physical parameter that drives stabilit... The aim of this research is to deepen the knowledge of the role of friction on the dynamics of granular media;in particular the friction angle is taken into consideration as the physical parameter that drives stability, motion and deposition of a set of grains of any nature and size. The idea behind this work is a question: is the friction angle really that fundamental and obvious physical parameter which rules stability and motion of granular media as it seems from most works which deal with particle dynamics? The experimental study tries to answer this question with a series of laboratory tests, in which different natural and artificial granular materials have been investigated in dry condition by means of a tilting flume. The characteristic friction angles, both in deposition(repose) and stability limit(critical) conditions, were measured and checked against size, shape, density and roughness of the considered granular material. The flume tests have been preferred to 'classical' geotechnical apparatuses(e.g. shear box) since the flume experimental conditions appear closer to the natural ones of many situations of slope stability interest(e.g. a scree slope). The results reveal that characteristic friction angles depend on size and shape of grains while mixtures of granules of different size show some sorting mechanism with less clear behaviour. 展开更多
关键词 RHEOLOGY GRANULAR material FRICTION angle DEPOSITION PROCESS YIELDING PROCESS
基于过程的“条块化”医院管理模式 预览
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作者 郭骁 《北京社会科学》 CSSCI 北大核心 2019年第4期116-128,共13页
《医院评审暂行办法》以及配套制定的一揽子评审标准与实施细则,是目前医院管理制度的汇总与集成。因此,评审办法的利弊得失直接反映了目前医院管理模式存在的问题,包括医院管理视角的'线性化'而非'系统化',医院管理实... 《医院评审暂行办法》以及配套制定的一揽子评审标准与实施细则,是目前医院管理制度的汇总与集成。因此,评审办法的利弊得失直接反映了目前医院管理模式存在的问题,包括医院管理视角的'线性化'而非'系统化',医院管理实践的'法条化'而非'权变化',医院管理思维的'医学化'而非'管理化',以及医院管理抓手的'结果导向'而非'过程导向'。为解决这些问题,有必要构建基于'过程'的医院管理模式,将'过程'作为医院管理与考核的单元并明确过程所有者,由此形成'部门'和'过程'相结合的二维'矩阵型'管理模式。在此基础上,基于三元分类维度和四元设计维度可以对医疗服务('大医疗')依'过程'拆解并重新整合为若干医疗服务子类('小医疗'),形成'条块化'分类,进而分类制定差别化的管理制度、评审办法以及改革政策。 展开更多
关键词 医院管理模式 过程 过程所有者 矩阵型 条块化
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玻璃配合料水分与均匀度的相关性探究 预览
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作者 何旭远 任红 《中国玻璃》 2019年第4期3-8,共6页
玻璃配合料的均匀度是多因素综合影响的结果,如配合料水分、原料粒级配比、搅拌设备类型、混料时间、加料顺序、原料种类等。配合料水分受原料含水量和制备工序补水量的影响,原料方面又受石英砂含水量的影响,这是配合料水分含量波动的... 玻璃配合料的均匀度是多因素综合影响的结果,如配合料水分、原料粒级配比、搅拌设备类型、混料时间、加料顺序、原料种类等。配合料水分受原料含水量和制备工序补水量的影响,原料方面又受石英砂含水量的影响,这是配合料水分含量波动的主要原因,由此波及到配合料制备均匀度的变化。因此,探究配合料水分与均匀度的相关性,对于优化配合料制备工序管制目标、有效提升配合料制备均匀度具有非常重要的意义。 展开更多
关键词 水分均匀度 相关性 工序 过控
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制备橡胶符合PV3900:2000气味标准生产影响因素及过程控制 预览
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作者 孟程龙 《橡塑技术与装备》 CAS 2019年第19期49-51,共3页
为保障橡胶产品气味质量的合格与稳定,符合PV3900:2000标准的要求,本文通俗易懂的说明了配合工序、混炼工序、加硫工序、成型工序、二次烘烤工艺、物料存储、周转、包装等可能遇到的问题点、影响因素以及如何避免导致质量问题,并通过提... 为保障橡胶产品气味质量的合格与稳定,符合PV3900:2000标准的要求,本文通俗易懂的说明了配合工序、混炼工序、加硫工序、成型工序、二次烘烤工艺、物料存储、周转、包装等可能遇到的问题点、影响因素以及如何避免导致质量问题,并通过提高操作人员生产质量意识,进行全流程的质量管控,按照标准操作规格操作。以此满足产品性能要求。 展开更多
关键词 气味 工序 影响因素 过程控制
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A Kind of Lean Approach for Removing Wastes From Non-Manufacturing Process With Various Facilities 预览
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作者 Guangyu Xiong Xiuqin Shang +1 位作者 Gang Xiong Timo R.Nyberg 《自动化学报:英文版》 CSCD 2019年第1期307-315,共9页
It is important to identify and remove the wastes not only from manufacturing process, but also from nonmanufacturing process. In the last several decades, significant research achievements and practice benefits have ... It is important to identify and remove the wastes not only from manufacturing process, but also from nonmanufacturing process. In the last several decades, significant research achievements and practice benefits have been achieved about removing wastes from manufacturing process. Since the1990 s, some researchers and lean practitioners have paid more attention to removing waste from non-manufacturing process.Based on the authors’ research work and industrial practice, the paper introduces a kind of lean approach for removing waste from non-manufacturing process. In its case study, the order handling process in a value chain is described with respect to a factory and its downstream distribution centers(DCs). The paper proposes a lean approach solution for creating the improved order handling process, and analyze how great improvements in performance can be achieved. As a result, the significant achievement has created a win-win scenario for both the nonmanufacturing process in a factory and non-manufacturing facilities(like DCs) across the value chain. It demonstrates that improvements have been made by removing waste from the non-manufacturing process that takes place within a factory as well as with external participants through the whole value chain. Likewise, the proposed lean approach has helped the case companies to achieve greater levels of efficiency and more benefits. Finally, some conclusions are drawn. 展开更多
关键词 LEAN APPROACH non-manufacturing PROCESS optimized order handling PROCESS removing WASTES value chain win-win scenario
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Software Reliability Growth Model Considering First-Step and Second-Step Fault Dependency
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作者 彭锐 马晓洋 +1 位作者 翟庆庆 高凯烨 《上海交通大学学报:英文版》 EI 2019年第4期477-479,共3页
As one of the most important indexes to evaluate the quality of software, software reliability experiences an increasing development in recent years. We investigate a software reliability growth model(SRGM). The appli... As one of the most important indexes to evaluate the quality of software, software reliability experiences an increasing development in recent years. We investigate a software reliability growth model(SRGM). The application of this model is to predict the occurrence of the software faults based on the non-homogeneous Poisson process(NHPP). Unlike the independent assumptions in other models, we consider fault dependency. The testing faults are divided into three classes in this model: leading faults, first-step dependent faults and second-step dependent faults. The leading faults occurring independently follow an NHPP, while the first-step dependent faults only become detectable after the related leading faults are detected. The second-step dependent faults can only be detected after the related first-step dependent faults are detected. Then, the combined model is built on the basis of the three sub-processes. Finally, an illustration based on real dataset is presented to verify the proposed model. 展开更多
关键词 software reliability growth model (SRGM) FAULT DEPENDENCY NON-HOMOGENEOUS Poisson PROCESS (NHPP) FAULT detection PROCESS (FDP)
Process intensification in vapor–liquid mass transfer: The state-of-the-art
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作者 Hong Li Chuanhui Wu +2 位作者 Zhiqiang Hao Xingang Li Xin Gao 《中国化学工程学报:英文版》 SCIE EI CAS CSCD 2019年第6期1236-1246,共11页
The concept of process intensification(PI) has absorbed diverse definitions and stays true to the mission—'do more with less', which is an approach purposed by chemical engineers to solve the global energy &a... The concept of process intensification(PI) has absorbed diverse definitions and stays true to the mission—'do more with less', which is an approach purposed by chemical engineers to solve the global energy & environment problems. To date, the focus of PI has been on processes mainly involving vapor/liquid systems. Based on the fundamental principles of vapor–liquid mass transfer process like distillation and absorption, there are three strategies to intensify interphase mass transfer: enhancing the overall driving force, improving the mass transfer coefficient and enlarging the vapor–liquid interfacial area. More specifically, this article herein provides an overview of various technologies to strengthen the vapor–liquid mass transfer, including application of external fields, addition of third substances, micro-chemical technology and usage of solid foam, with the objective to contribute to the future developments and potential applications of PI in scientific research and industrial sectors. 展开更多
关键词 Mass TRANSFER Transport PROCESS TWO-PHASE flow PROCESS INTENSIFICATION MICROWAVE field Foam
High density γ-ray emission and dense positron production via multi-laser driven circular target
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作者 侯雅娟 谢柏松 +5 位作者 吕冲 弯峰 王莉 Nureli YASEN 桑海波 夏国兴 《等离子体科学与技术:英文版》 SCIE EI CAS CSCD 2019年第8期34-42,共9页
A diamond-like carbon circular target is proposed to improve γ-ray emission and pair production with a laser intensity of 8×1022 W cm-2by using 2D particle-in-cell simulations with quantum electrodynamics.It is ... A diamond-like carbon circular target is proposed to improve γ-ray emission and pair production with a laser intensity of 8×1022 W cm-2by using 2D particle-in-cell simulations with quantum electrodynamics.It is found that the circular target can enhance the density of γ-photons significantly more than a plane target, when two colliding circularly polarized lasers irradiate the target.By multi-laser irradiating the circular target, the optical trap of lasers can prevent the high energy electrons accelerated by laser radiation pressure from escaping.Hence, γ-photons with a high density of beyond 5000 ncare obtained through nonlinear Compton backscattering.Meanwhile, 2.7×1011 positrons with an average energy of 230 MeV are achieved via the multiphoton Breit-Wheeler process.Such an ultrabright γ-ray source and dense positron source can be useful in many applications.The optimal target radius and laser mismatching deviation parameters are also discussed in detail. 展开更多
关键词 e+e-pairs PRODUCTION Γ-RAY EMISSION Breit-Wheeler(BW) PROCESS COMPTON backscattering(NCBS) PROCESS particle-in-cell(PIC)
油气集输工艺过程及流程选用探讨 预览
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作者 平森 《石化技术》 CAS 2019年第8期12-12,62,共2页
油气集输是对油气能源收集、处理以及运输的过程。在这个过程中处理工艺及流程的选用是非常重要的,这将直接关系到油气集输的效果和质量。具体的处理方式是利用相应的技术手段将油气的混合物集中起来进行处理,使之与国家的相关要求与质... 油气集输是对油气能源收集、处理以及运输的过程。在这个过程中处理工艺及流程的选用是非常重要的,这将直接关系到油气集输的效果和质量。具体的处理方式是利用相应的技术手段将油气的混合物集中起来进行处理,使之与国家的相关要求与质量检测标准相符合,然后将油气输入管道,为工业和生产生活服务。 展开更多
关键词 油气集输 工艺过程 流程选用
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Process intensification and energy saving of reactive distillation for production of ester compounds
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作者 Chunli Li Cong Duan +1 位作者 Jing Fang Hongshi Li 《中国化学工程学报:英文版》 SCIE EI CAS CSCD 2019年第6期1307-1323,共17页
Reactive distillation(RD) process is an innovative hybrid process combining reaction with distillation, which has recently come into sharp focus as a successful case of process intensification. Considered as the most ... Reactive distillation(RD) process is an innovative hybrid process combining reaction with distillation, which has recently come into sharp focus as a successful case of process intensification. Considered as the most representative case of process intensification, it has been applied for many productions, especially for production of ester compounds. However, such problems existing in the RD system for ester productions are still hard to solve,as the removal of the water which comes from the esterification, and the separation of the azeotropes of ester–alcohol(–water). Many methods have been studying on the process to solve the problems resulting in further intensification and energy saving. In this paper, azeotropic–reactive distillation or entrainer enhanced reactive distillation(ERD) process, reactive extractive distillation(RED) process, the method of co-production in RD process, pressure-swing reactive distillation(PSRD) process, reactive distillation–pervaporation coupled process(RD–PV), are introduced to solve the problems above, so the product(s) can be separated efficiently and the chemical equilibrium can be shifted. Dividing-wall column(DWC) structure and novel methods of loading catalyst are also introduced as the measures to intensify the process and save energy. 展开更多
关键词 REACTIVE DISTILLATION PROCESS INTENSIFICATION PROCESS COUPLING THERMAL COUPLING
赛络纺中空涤纶/维劳伏特70/30 14.8 tex纱生产实践 预览
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作者 许洪福 《纺织器材》 2019年第1期49-51,共3页
为提高赛络纺中空涤纶/维劳伏特70/30 14.8tex混纺纱的成纱质量,介绍中空涤纶和维劳伏特2种纤维的特性,以及该混纺纱的纺纱工艺流程,分析开清棉、梳棉、并条、粗纱、细纱和络筒等各工序的主要工艺配置及技术措施,并探讨各工序的温湿度... 为提高赛络纺中空涤纶/维劳伏特70/30 14.8tex混纺纱的成纱质量,介绍中空涤纶和维劳伏特2种纤维的特性,以及该混纺纱的纺纱工艺流程,分析开清棉、梳棉、并条、粗纱、细纱和络筒等各工序的主要工艺配置及技术措施,并探讨各工序的温湿度控制原则。指出:纺赛络纺中空涤纶/维劳伏特70/30 14.8tex混纺纱,开清棉工序应降低打手速度、放大隔距以减少纤维损伤,梳棉工序应控制生条的棉结和短绒,并粗工序合理配置牵伸工艺和粗纱捻系数,细纱工序应合理选用喇叭口、捻系数、钢领、钢丝圈、整顿机械状态以减少断头,络筒工序应合理设置清纱曲线和络纱速度以减少毛羽的增长,控制各工序温湿度和操作管理等保证成纱质量稳定。 展开更多
关键词 赛络纺 中空涤纶 维劳伏特 混纺 工序 工艺参数 温湿度
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LONG-TIME ASYMPTOTIC OF STABLE DAWSON-WATANABE PROCESSES IN SUPERCRITICAL REGIMES 预览
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作者 Khoa Lê 《数学物理学报:B辑英文版》 SCIE CSCD 2019年第1期37-45,共9页
Let W =(Wt)t≥0 be a supercritical a-stable Dawson-Watanabe process(withα∈(0,2]) and f be a test function in the domain of-(-△)α/2 satisfying some integrability condition. Assuming the initial measure W0 has a fin... Let W =(Wt)t≥0 be a supercritical a-stable Dawson-Watanabe process(withα∈(0,2]) and f be a test function in the domain of-(-△)α/2 satisfying some integrability condition. Assuming the initial measure W0 has a finite positive moment, we determine the long-time asymptotic of arbitrary order of Wt(f). In particular, it is shown that the local behavior of Wt in long-time is completely determined by the asymptotic of the total mass Wt(1), a global characteristic. 展开更多
关键词 Dawson-Watanabe PROCESS α-stable PROCESS
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Evolutionary game dynamics of combining the Moran and imitation processes
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作者 王先甲 顾翠伶 +1 位作者 吕少杰 全吉 《中国物理B:英文版》 SCIE EI CAS CSCD 2019年第2期94-105,共12页
One of the assumptions of previous research in evolutionary game dynamics is that individuals use only one rule to update their strategy. In reality, an individual’s strategy update rules may change with the environm... One of the assumptions of previous research in evolutionary game dynamics is that individuals use only one rule to update their strategy. In reality, an individual’s strategy update rules may change with the environment, and it is possible for an individual to use two or more rules to update their strategy. We consider the case where an individual updates strategies based on the Moran and imitation processes, and establish mixed stochastic evolutionary game dynamics by combining both processes. Our aim is to study how individuals change strategies based on two update rules and how this affects evolutionary game dynamics. We obtain an analytic expression and properties of the fixation probability and fixation times(the unconditional fixation time or conditional average fixation time) associated with our proposed process. We find unexpected results. The fixation probability within the proposed model is independent of the probabilities that the individual adopts the imitation rule update strategy. This implies that the fixation probability within the proposed model is equal to that from the Moran and imitation processes. The one-third rule holds in the proposed mixed model. However, under weak selection, the fixation times are different from those of the Moran and imitation processes because it is connected with the probability that individuals adopt an imitation update rule. Numerical examples are presented to illustrate the relationships between fixation times and the probability that an individual adopts the imitation update rule, as well as between fixation times and selection intensity. From the simulated analysis, we find that the fixation time for a mixed process is greater than that of the Moran process, but is less than that of the imitation process. Moreover, the fixation times for a cooperator in the proposed process increase as the probability of adopting an imitation update increases;however, the relationship becomes more complex than a linear relationship. 展开更多
关键词 EVOLUTIONARY game dynamics MORAN PROCESS IMITATION PROCESS FIXATION PROBABILITY FIXATION time
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