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A field-based service management and discovery method in multiple clouds context
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作者 Shuai ZHANG Xinjun MAO +1 位作者 Fu HOU Peini LIU 《中国计算机科学前沿:英文版》 SCIE EI CSCD 2019年第5期976-995,共20页
In diverse and self-governed multiple clouds context, the service management and discovery are greatly challenged by the dynamic and evolving features of services. How to manage the features of cloud services and supp... In diverse and self-governed multiple clouds context, the service management and discovery are greatly challenged by the dynamic and evolving features of services. How to manage the features of cloud services and support accurate and efficient service discovery has becomean open problem in the area of cloud computing. This paper proposes a field model of multiple cloud services and corresponding service discovery method to address the issue. Different from existing researches, our approach is inspired by Bohr atom model. We use the abstraction of energy level and jumping mechanism to describe services status and variations, and thereby to support the service demarcation and discovery. The contributions of this paper are threefold. First, we propose the abstraction of service energy level to represent the status of services, and service jumping mechanism to investigate the dynamic and evolving features as the variations and re-demarcation of cloud services according to their energy levels. Second, we present user acceptable service region to describe the services satisfying users' requests and corresponding service discovery method, which can significantly decrease services search scope and improve the speed and precision of service discovery. Third, a series of algorithms are designed to implement the generation of field model, user acceptable service regions, service jumping mechanism, and user-oriented service discovery. We have conducted an extensive experiments on QWS dataset to validate and evaluate our proposed models and algorithms. The results show that field model can well support the representation of dynamic and evolving aspects of services in multiple clouds context and the algorithms can improve the accuracy and efficiency of service discovery. 展开更多
关键词 SERVICE FIELD SERVICE energy level SERVICE JUMPING SERVICE management SERVICE discovery MULTIPLE CLOUDS
服务的经济学说史
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作者 高晨曦 《海派经济学》 2019年第1期192-209,共18页
本文旨在系统性地梳理自古典时代以来经济学家们对服务和服务劳动的理论。第一部分从斯密对服务劳动的二重规定出发,考察以萨伊等为代表的素材主义视角及其缺陷,以及以马克思为代表的形态论视角及其历史背景,明确了斯密和马克思的服务... 本文旨在系统性地梳理自古典时代以来经济学家们对服务和服务劳动的理论。第一部分从斯密对服务劳动的二重规定出发,考察以萨伊等为代表的素材主义视角及其缺陷,以及以马克思为代表的形态论视角及其历史背景,明确了斯密和马克思的服务劳动是生产劳动的对立概念,是消费资本家的财富的非生产劳动。第二部分首先介绍马克思的服务论,马克思认为服务是消费使用价值时的有用作用,与使用价值是商品还是劳动、是否采取对象形态无关。其次,本文指出斯密和马克思的服务劳动论建立在以消费使用价值为目的的服务关系上,它与以生产剩余价值为目的的资本主义关系无法共存,不应该混同马克思的服务论和服务劳动论。第三部分介绍'服务业'概念形成后,经济学、社会学和人类学对服务论的新贡献,指出只有超越服务劳动生产性的争论,才能建立现代的马克思主义服务理论。 展开更多
关键词 服务 服务劳动 服务关系 有用作用 生产劳动
Cloud service selection using cloud service brokers: approaches and challenges
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作者 Meysam VAKILI Neda JAHANGIRI Mohsen SHARIFI 《中国计算机科学前沿:英文版》 SCIE EI CSCD 2019年第3期599-617,共19页
Cloud computing users are faced with a wide variety of services to choose from. Consequently, a number of cloud service brokers (CSBs) have emerged to help users in their service selection process. This paper reviews ... Cloud computing users are faced with a wide variety of services to choose from. Consequently, a number of cloud service brokers (CSBs) have emerged to help users in their service selection process. This paper reviews the recent approaches that have been introduced and used for cloud service brokerage and discusses their challenges accordingly. We propose a set of attributes for a CSB to be considered effective. DifFerent CSBs' approaches are classified as either single service or multiple service models. The CSBs are then assessed, analyzed, and compared with respect to the proposed set of attributes. Based on our studies, CSBs with multiple service models that support more of the proposed effective CSB attributes have wider application in cloud computing environments. 展开更多
关键词 CLOUD SERVICE BROKER (CSB) CLOUD SERVICE SELECTION CLOUD computing quality of SERVICE (QoS)
The Upgraded CIFTIS As A Platform for Global Service Trade 预览
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作者 Lily Wang 《中国对外贸易:英文版》 2019年第3期32-33,共2页
The 2019 CIFTIS(China International Fair for Trade in Service)themed on 'openness,innovation,wisdom and integration' has recently closed down in Beijing.This year CIFTIS has been upgraded to national exhibitio... The 2019 CIFTIS(China International Fair for Trade in Service)themed on 'openness,innovation,wisdom and integration' has recently closed down in Beijing.This year CIFTIS has been upgraded to national exhibition and witnessed the signing of 440 project contracts with the total contract value of USD 105.06billion,a record high in the event history.There are 134 projects in foreign countries with total contract value of USD 17.55 billion. 展开更多
关键词 SERVICE The Upgraded CIFTIS AS A PLATFORM for GLOBAL SERVICE TRADE SERVICE
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马克思的服务理论适用于当代服务业分析吗?--消费过程中国民收入的再分配与神秘化 预览
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作者 高晨曦 《西部论坛》 CSSCI 北大核心 2019年第4期39-52,共14页
本文从“服务是什么”、“服务提供的资本主义形态”、“围绕服务提供的国民收入的分配和再分配”三个方面出发,探讨马克思的服务论和服务劳动论是否适用于当代服务业分析。首先,马克思把服务看作使用价值的有用作用,看作消费过程而非... 本文从“服务是什么”、“服务提供的资本主义形态”、“围绕服务提供的国民收入的分配和再分配”三个方面出发,探讨马克思的服务论和服务劳动论是否适用于当代服务业分析。首先,马克思把服务看作使用价值的有用作用,看作消费过程而非直接生产过程的范畴,因此把“服务”视作商品、“精神劳动”产品的观点与庸俗经济学并无二致。学界应区分“服务”和“提供服务的劳动”的概念。其次,从资本主义制度下消费者“购买服务”时的经济关系来看,资本主义下提供服务的形式是将消费资料和服务工人劳动力的短期使用权以实物形式租赁给消费者。在提供服务前,消费者就已经支付包含服务资本利润在内的租赁费用。在这个过程中,处于资本-雇佣劳动关系下的消费者将受到“二次剥削”。最后,本文将服务提供部门视作非生产部门,将其附加在再生产公式中,通过模拟社会再生产以及货币的预付和回流过程,揭示购买“服务”行为背后国民收入的分配和再分配的规律。 展开更多
关键词 服务 使用价值 实物租赁 服务商品 国民收入
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一种Android进程保护方案 预览
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作者 任雁军 欧添翼 《信息与电脑》 2019年第3期126-128,131共4页
Android(安卓)是移动和便携设备中应用最广的操作系统。笔者从一个Android应用开发者的角度,简要介绍了Android系统的来源及主要优点,详细说明了其进程管理机制特别是进程优先级与进程分类和进程回收机制之间的关系,提出了进程保护概念... Android(安卓)是移动和便携设备中应用最广的操作系统。笔者从一个Android应用开发者的角度,简要介绍了Android系统的来源及主要优点,详细说明了其进程管理机制特别是进程优先级与进程分类和进程回收机制之间的关系,提出了进程保护概念,并归纳了常用的进程保护方法,提出了一种行之有效的进程保护方案,并详细分析、解读了该方案的原理、实现方法以及核心源代码。 展开更多
关键词 ANDROID 进程保护 SERVICE 广播 APP
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服役期内压力容器壳体材料力学性能的评估与分析 预览
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作者 刘铁映 王广林 王良超 《电站辅机》 2019年第1期1-3,33共4页
评估服役多年压力容器壳体材料剩余的使用期,均基于腐蚀及疲劳损伤的原理进行评测。对于服役多年的压力容器壳体,当壳体材料的力学性能指标下降后,如何合理地评估,在国内外标准中,尚未有明确的规定。现以某型高压加热器为例,评估了旧壳... 评估服役多年压力容器壳体材料剩余的使用期,均基于腐蚀及疲劳损伤的原理进行评测。对于服役多年的压力容器壳体,当壳体材料的力学性能指标下降后,如何合理地评估,在国内外标准中,尚未有明确的规定。现以某型高压加热器为例,评估了旧壳体材料的力学性能。 展开更多
关键词 压力容器 壳体 材料 力学性能 强度 评估 服役期内 使用寿命
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Valuating service loss of snow cover in Irtysh River Basin 预览
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作者 YANG Yang WU Xue-Jiao +2 位作者 LIU Shi-Wei XIAO Cun-De WANG Xiaoming 《气候变化研究进展:英文版》 CSCD 2019年第2期109-114,共6页
Snow cover provides essential resources and services for human well-being and socioeconomic development in arid areas. With the change in snow cover resulting from climate change that causes concerns about its consequ... Snow cover provides essential resources and services for human well-being and socioeconomic development in arid areas. With the change in snow cover resulting from climate change that causes concerns about its consequences, there is a pressing need to analyze and understand its impact on the benefits that people has been enjoying from snow cover. These can be derived from the variation in economic value of snow services, that are demanded to meet socioeconomic activities. Based on the average decline mass of snow cover from 1979 to 2016 in Irtysh River Basin, we use the approach by applying economic evaluation to estimate the annual value loss of snow services. Considering the decreasing trend of snow cover mass at rates of 10.2 Mt per year (p < 0.05) or 0.3% per year, the annual service loss in Irtysh River Basin is currently worth up to CN 196 million. Within it, the service loss of climate regulation contributes the most, or about CN 84.7 million. The loss of freshwater service contributes only about 19%, implying that there would be a significant underestimation of service loss if only water supply would be considered. This may cause biased decision-making when we are facing the challenges of declining services as a result of climate change, impacting on the balancing of socioeconomic development and environment conservation for the sustainability over a long term. 展开更多
关键词 CRYOSPHERE science Climate change SNOW COVER CRYOSPHERE SERVICE SERVICE value Irtysh river basin
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基层开放大学班主任工作的实践与思考--以佛山开放大学为例 预览
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作者 孙文政 《广东开放大学学报》 2019年第2期16-19,共4页
随着开放教育的不断发展,基层开放大学班主任开展学习支持服务还面临着诸多困境。通过对各类班主任模式的分析,结合佛山开放大学三个阶段的实践,研究提出基层开放大学应着力优化班主任队伍建设,提高专业素养,加强各团队间的互通联动,增... 随着开放教育的不断发展,基层开放大学班主任开展学习支持服务还面临着诸多困境。通过对各类班主任模式的分析,结合佛山开放大学三个阶段的实践,研究提出基层开放大学应着力优化班主任队伍建设,提高专业素养,加强各团队间的互通联动,增强服务意识。同时,对学生开展补偿性和可扩展性教育服务,系统地融合各类学习资源,营造良好的环境和机制以提升班主任职业能力,以更加有效地提高班主任的学习支持服务质量和效果。 展开更多
关键词 开放大学 班主任 服务 学习支持服务
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定义“服务设计” 预览
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作者 胡飞 李顽强 《包装工程》 CAS 北大核心 2019年第10期37-51,共15页
目的厘清"服务设计"的概念缘起、定义辨析、本质属性、内在逻辑。方法通过文献法,全面梳理经济学、管理学、设计学等不同学科关于"服务"的研究脉络,如服务活动-服务产业-服务经济、管理服务-服务营销-服务管理、服... 目的厘清"服务设计"的概念缘起、定义辨析、本质属性、内在逻辑。方法通过文献法,全面梳理经济学、管理学、设计学等不同学科关于"服务"的研究脉络,如服务活动-服务产业-服务经济、管理服务-服务营销-服务管理、服务工程-服务科学-服务学等,重在概念溯源;借助比较法,对比服务经济、服务营销、服务管理、服务科学等不同领域中的服务定义,重在定义辨析;广泛比较了设计学科中不同的服务设计定义,并归纳为5个方面,进而比较了设计学与不同学科中服务研究的关注点异同,重在本质属性。结论总结出服务研究的共性特征,归纳出"服务"的一般定义;据此确定了服务设计定义的学理依据,进而对服务设计的定义进行了修正。 展开更多
关键词 服务 服务设计 定义 研究脉络
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诉前约定送达地址问题研究
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作者 刘学在 刘鋆 《河北法学》 CSSCI 北大核心 2019年第1期46-54,共9页
在“送达难”的现实背景下,当事人诉前在合同中约定送达地址,法院据此地址进行送达不失为缓解“送达难”问题的一个新路径.送达地址之约定行为属于与效性诉讼行为,约定送达地址之条款具备诉讼契约之性质,法院据此进行法律文书的送达也... 在“送达难”的现实背景下,当事人诉前在合同中约定送达地址,法院据此地址进行送达不失为缓解“送达难”问题的一个新路径.送达地址之约定行为属于与效性诉讼行为,约定送达地址之条款具备诉讼契约之性质,法院据此进行法律文书的送达也因此产生诉讼法上的效力。诉前约定送达地址制度具有正当性根据,但目前该制度的推广仅停留在司法建议与内部工作方法层面,其效力在立法层面并未明确得到认可。为协调当事人的合意与产生诉讼法上的效果之间的关系,未来立法上应当对诉前约定送达地址的适用范围、适用程序、必要条款、违反该约定后的法律救济等问题进行规制,以便充分发挥其应有功能。 展开更多
关键词 送达 民事合同 约定送达地址 诉讼契约
少数民族地区研究生教育全面服务质量管理研究 预览
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作者 武启帆 丰佳栋 张慧 《内蒙古财经大学学报》 2019年第4期82-85,共4页
教育属于现代服务的研究领域,通过实现知识的传承取得经济效益,实现社会目标。基于服务管理的定义,接受研究生教育的学生就是其顾客,服务过程的质量标准就是学生(顾客)满意。由于招生规模的扩大,目前我国的研究生教育存在着质量下降的趋... 教育属于现代服务的研究领域,通过实现知识的传承取得经济效益,实现社会目标。基于服务管理的定义,接受研究生教育的学生就是其顾客,服务过程的质量标准就是学生(顾客)满意。由于招生规模的扩大,目前我国的研究生教育存在着质量下降的趋势,特别是民族地区的研究生教育普遍存在目标不清晰的问题。因此,本文通过研究以现代服务管理的思想进行教育创新.以学生顾客中心的质量标准,建立多目标的新型研究生教育管理体系,以培养综合能力为基础设计全面服务质量管理管理目标,解决目前研究生教育与社会实际和学生期望脱节等问题,实现社会责任和公共服务的教育任务。 展开更多
关键词 研究生教育 服务 全面服务质量
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Discussion on Improving Decision-making Meteorological Service Level of County-level Meteorological Station 预览
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作者 Zhu Hexiang Wang Chufeng +1 位作者 Fu Zhaoguang Lv Xiaohua 《气象与环境研究:英文版》 CAS 2019年第2期41-43,共3页
Based on experience of meteorological service at county-level meteorological station in recent 20 years,status quo of decision-making meteorological service,main influence factors of decision-making meteorological ser... Based on experience of meteorological service at county-level meteorological station in recent 20 years,status quo of decision-making meteorological service,main influence factors of decision-making meteorological service and writing of decision-making meteorological service materials are analyzed,and measures and suggestions of improving decision-making meteorological service level are proposed. The research aims to improve public meteorological service level at grass-roots level,provide scientific decision-making basis for government departments preventing and reducing disaster,and reduce loss of life and property of the country and people caused by meteorological disasters to the maximum extent. 展开更多
关键词 METEOROLOGICAL station DECISION-MAKING SERVICE DISASTER prevention and MITIGATION SERVICE LEVEL
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LCCFS: a lightweight distributed file system for cloud computing without journaling and metadata services
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作者 Li WANG Jingling XUE +2 位作者 Xiangke LIAO Yunchuan WEN Min CHEN 《中国科学:信息科学(英文版)》 SCIE EI CSCD 2019年第7期142-155,共14页
The major usage of a file system integrated with a cloud computing platform is to provide the storage for VM(virtual machine) instances. Distributed file systems, especially those implemented on top of object storage ... The major usage of a file system integrated with a cloud computing platform is to provide the storage for VM(virtual machine) instances. Distributed file systems, especially those implemented on top of object storage have many potential advantages over traditional local file systems for VM instance storage. In this paper, we make an investigation in the requirements imposed on a file system in cloud computing scenario,and claim that the implementation of a file system for VM instance storage could be reasonably simplified. We demonstrate that on top of an object storage with simple object-granularity transaction support, a lightweight distributed file system, which requires neither journaling nor dedicated metadata services, can be developed for cloud computing. We have implemented such a distributed file system, called LCCFS(lightweight cloud computing file system), based on the RADOS(reliable autonomic distributed object storage) object storage.Our experimental results show that for the main workloads in cloud computing, LCCFS achieves almost the same or slightly higher performance than CephFS(ceph filesystem), another published distributed file system based on RADOS. Compared to CephFS, LCCFS has only one tenth of its LOCs(lines of code). This theoretical simplicity makes it easy to implement LCCFS correctly and stably by avoiding the sheer design and implementation complexity behind CephFS, thereby making LCCFS a promising candidate in the cloud computing production environment. 展开更多
关键词 cloud COMPUTING distributed file system journaling METADATA service GARBAGE COLLECTION
Language Service Turn of Translation Studies 预览
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作者 任素文 《海外英语》 2019年第8期41-42,共2页
With the development of the society, translation becomes more and more important. This thesis aims at the development of translation with the aspects of“Belt and Road”Initiative and contributes to the language servi... With the development of the society, translation becomes more and more important. This thesis aims at the development of translation with the aspects of“Belt and Road”Initiative and contributes to the language services. 展开更多
关键词 LANGUAGE service TURN TRANSLATION TURN “One BELT and ONE Road”strategy
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宗教慈善与社会工作:历史、流变与关系互嵌 预览
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作者 吴限红 杨克 李芹 《华东理工大学学报:社会科学版》 CSSCI 北大核心 2019年第2期20-27,共8页
本文通过历史性动态视角审视宗教慈善与社会工作的会通性,演绎宗教与社会服务的关联性,基督教神学教义塑造了社会工作伦理的核心维度、社会工作服务中的个案方法、小组方法和社区方法,发端于教会的济贫实践。本文剖析了社会工作由于职... 本文通过历史性动态视角审视宗教慈善与社会工作的会通性,演绎宗教与社会服务的关联性,基督教神学教义塑造了社会工作伦理的核心维度、社会工作服务中的个案方法、小组方法和社区方法,发端于教会的济贫实践。本文剖析了社会工作由于职业独立性、服务专业性与宗教渐行渐远,后受福利国家理念变革而重构关系,并阐释了影响宗教慈善与社会工作关系互嵌的三个核心变量:福利制度载体促动,宗教灵性与小团体的推动和社会工作价值矫正需求。 展开更多
关键词 宗教 慈善 服务 社会工作
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服役后HR3C钢高温持久组织的研究
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作者 李新梅 张忠文 +3 位作者 李文 谢清宽 杜宝帅 魏玉忠 《热加工工艺》 北大核心 2019年第4期61-63,共3页
通过高温持久试验、金相显微镜、扫描电镜及能谱仪、X-射线衍射仪,研究了服役5万小时后HR3C钢在650℃条件下的高温持久组织。结果表明,服役后HR3C钢的高温持久断口主要为沿晶断裂,断口区域处的组织已经处于严重脆化状态。服役后HR3C钢... 通过高温持久试验、金相显微镜、扫描电镜及能谱仪、X-射线衍射仪,研究了服役5万小时后HR3C钢在650℃条件下的高温持久组织。结果表明,服役后HR3C钢的高温持久断口主要为沿晶断裂,断口区域处的组织已经处于严重脆化状态。服役后HR3C钢持久过程中的析出相主要有NbCrN、Nb(C,N)和M23C6。细小弥散分布的NbCrN和Nb(C,N)有利于提高高温强度,而沿晶呈链条状分布的M23C6可严重削弱HR3C钢的高温强度。 展开更多
关键词 服役:HR3C钢 持久 组织 析出相
Pricing and Service Strategies for Two-sided Platforms
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作者 Xiaogang Lin Chuanying Chen +1 位作者 Zhaozhan Lin Yongwu Zhou 《系统科学与系统工程学报:英文版》 SCIE EI CSCD 2019年第3期299-316,共18页
Nowadays,more and more transactions or interactions like online dating and shopping are completed on two-sided platforms involving two groups of agents.On these two-sided platforms,there often exist cross-network effe... Nowadays,more and more transactions or interactions like online dating and shopping are completed on two-sided platforms involving two groups of agents.On these two-sided platforms,there often exist cross-network effects,i.e., the benefits that agents at one side receive are positively related to the number of agents at the other side,and vice versa.This paper considers such two-sided platforms,where the platforms offer a certain service to attract agents of both sides to join the platforms,and then charge agents who join the platforms a lump-sum fee to gain the profit.We present service and pricing strategies for both monopolistic and duopolistic platforms,respectively.We also investigate the impact of platforms'life cycle on their service and pricing strategies.Some managerial implications are shown. 展开更多
关键词 Two-sided MARKETS cross-network effects SERVICE level PLATFORM PRICING MULTI-HOMING
Risk Assessment and Service Benefit Evaluation of Forestry Meteorological Disasters in Guangxi 预览
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作者 Shuyan HUANG Yanjun LI +2 位作者 Youhua LI Shan GAO Wei LI 《亚洲农业研究:英文版》 2019年第4期34-39,共6页
In order to strengthen the construction of forestry meteorological service capacity and improve the quality of forestry meteorological services,the national forestry meteorological disaster risk survey and service ben... In order to strengthen the construction of forestry meteorological service capacity and improve the quality of forestry meteorological services,the national forestry meteorological disaster risk survey and service benefit assessment were carried out from November 2016 to May2017. A total of 196 risk sites in Guangxi were collected by means of questionnaire survey,expert evaluation and field survey. The results showed that fire,pest and wind hazards are the main types of risk points in Guangxi. The survey showed that there were 77 monitoring stations around the disaster risk sites belonging to the Forestry Sector,which mainly monitor fire hazards,while other disasters had no monitoring point yet. Early warning facilities were still constantly improving. The meteorological disasters that affecting forestry production were drought,gale,and heavy rainfall,and the main meteorological hazard factors were temperature,wind speed,and precipitation. Forest fire prevention,forestry resources development and utilization,forestation and tending demand for meteorological services were relatively large. It was hoped that forestry meteorological service products would be obtained through telephone,SMS and early warning systems. In addition,experts objectivly evaluated the contribution rate of meteorological services in Guangxi. The contribution rate of forest meteorological services in the whole region was8. 41%. The scale of Guangxi’s total forestry output value was 31. 478 billion yuan in 2016. According to the calculation of this value,the service benefit value had reached 2. 647 billion yuan. In conclusion,strengthening the cooperation in forestry meteorological monitoring,technology development,and emergency response,and further improving forestry meteorological services and effective reducing forestry disaster losses are the top priorities of the meteorological department. 展开更多
关键词 FORESTRY Risk CENSUS METEOROLOGICAL SERVICE BENEFIT evaluation
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新时代地震档案开发与利用--传承"地震文化"服务防震减灾 预览
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作者 梁营 李学勤 《山西档案》 2019年第4期153-156,共4页
“地震文化”是人类与地震奋勇抗争的历史记录,承载着地震工作者开拓创新、不惧艰险、求真务实和坚守奉献的行业精神,凝聚着为人民谋幸福、谋安全的初心使命。传承“地震文化”,激发青年一代脚踏实地、专注学术、用科研创新支撑事业、... “地震文化”是人类与地震奋勇抗争的历史记录,承载着地震工作者开拓创新、不惧艰险、求真务实和坚守奉献的行业精神,凝聚着为人民谋幸福、谋安全的初心使命。传承“地震文化”,激发青年一代脚踏实地、专注学术、用科研创新支撑事业、引领发展的热忱,也推进研究所档案史料编研和利用工作,服务新时代防震减灾现代化建设,推动社会主义文化兴盛繁荣。 展开更多
关键词 地震 文化 防震减灾 服务
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