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1.
Toward a ubiquitous consumer wireless world   总被引:1,自引:0,他引:1  
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2.
分析了CIM模型在自主计算中的研究现状和存在的问题,在GLanfranchi和ACali的基础上提出了一种具有演化功能的CIM模型。针对CIM模型的特点和需求,提出了一种基于描述逻辑DLRifd的CIM模型,即给出了将CIM模型转化为描述逻辑DLRifd知识库的方法,证明了该转化方法的正确性。以及给出了自动判断CIM模型一致性、冗余性、包含关系的方法,也证明了这些判断方法的正确性。  相似文献   

3.
Computer-integrated manufacturing (CIM) is introduced, and the communications needed to support CIM applications described. The GMT400 project, a CIM experiment which is intended to investigate the applicability of MAP (manufacturing automation protocol) technology in automotive manufacturing, is presented. Several other development projects in the CIM area are identified. Research and development issues in CIM are summarized  相似文献   

4.
The documentation effort undertaken by the Danish CIM/GEMS (computer-integrated manufacturing: general methods for specific solutions) project to drive, direct, and support its CIM-technology development and transfer activities is described. The project recognized that in the phases of CIM development-from planning through maintenance-the primary deliverable is not the CIM system itself, but the documentation used to describe, specify, justify, and support its development and use. As a result, the project organized itself so that it would transfer to its industry participants the information needed to build CIM systems, and not CIM technology alone. Because this information best resides in well-written and complete documentation, the CIM/GEMS project adopted a management-by-document approach, treating documentation activities as part of system development and assigning professional personnel to the task. As an archive of CIM-system development, the documents captured the project's in-progress work and the knowledge of developers who performed that work. As a deliverable, the documents were the principal means for carrying CIM knowledge and experience off-site  相似文献   

5.
文章对基于CIM智慧城市的规划领域进行研究,指出目前CIM仍停留在BIM和GIS阶段。通过对CIM应用场景的调研,阐述在基于CIM的智慧城市业态下,如何能够更好的开展“智慧城市”规划,以提升城市规划水平。文章指出,把智能化手段融入到传统城市规划的过程中,应把CIM相关内容(BIM、GIS和IOT)与AI、大数据和云计算等技术相结合,在多场景下对规划方案优选,实现规划精准、要素全面、场景真实的规划效果。还提出CIM不仅应用在智慧城市的规划建筑行业,还覆盖政务服务、城市治理、公共服务、产业经济等多个智慧城市的其他领域,通过基于CIM的智慧城市相关规划手段,可加快智慧城市向前演进的速度。  相似文献   

6.
Computer-integrated manufacturing (CIM) is the harmonious connection, integration, and interoperation of automation equipment within a manufacturing facility. In a semiconductor wafer fab, this includes integration of the processing equipment with all of the supporting systems for product and process specification, production planning and scheduling, and material handling and tracking. Traditionally, CIM systems have been characterized as monolithic mainframe-based systems and/or inflexible islands of automation with limited interoperability. Today's manufacturing demands fully integrated dynamic systems which directly support the concepts of lean, flexible and agile manufacturing to high quality standards. These requirements drove the design of a new CIM system which was developed for the Microelectronics Manufacturing Science and Technology (MMST) program. This paper provides an overview of the MMST CIM system framework which is based on open distributed system and object technologies. The CIM system was demonstrated in a 1000 wafer pilot production run in 1993 which achieved world record cycle time, and is now being commercialized as part of the WORKS product family from Texas Instruments  相似文献   

7.
For pt.I see ibid., vol.32, no.2, p.83-93 (1991). The authors explore the two-year Danish CIM/GEMS project in computer-integrated manufacturing (CIM) at the Technical University of Denmark to show how writing is an act of technology and knowledge representation, a vehicle of their transfer to a user community, and, if successful, an accommodation of technology to its users. They address creators and users of system documentation who need documentation for CIM implementation. The authors argue that documentation is often better for representing and explaining a CIM system than the actual system itself, and they recommend that documentation production be viewed not as a separate, end-of-project activity but as an integrated part of technical development. Planned and regular documentation production can in fact be a stimulus and aid to technical development, possibly even shortening the project life cycle  相似文献   

8.
随着信息安全问题受到越来越多的关注,安全管理工具也得到广泛应用。公共信息模型(CIM)目前仍是一个较新的发展领域,近年来越来越多地被应用到各项管理平台。针对信息安全管理的现状和需求,论文提出了一种基于CIM的安全预警系统的构思和建模:利用CIM对系统状态、攻击策略等对象进行建模,从关联关系和状态变化事件中发现安全隐患,从而实现对潜在的安全威胁的预警。  相似文献   

9.
随着“算力时代”到来,大规模数据需要在存储器和处理器之间往返,然而传统冯·诺依曼架构中计算与存储分离,无法满足频繁访问的需求。存内计算(CIM)技术的诞生突破了冯·诺依曼瓶颈,打破了传统计算架构中的“存储墙”,因此对于“算力时代”具有革命性意义。由于静态随机存取存储器(SRAM)读取数据的速度快且与先进逻辑工艺具有较好的兼容性,因此基于SRAM的存内计算技术受到国内外学者的关注。该文主要概述了基于SRAM的存内计算技术在机器学习、编码、加解密算法等方面的应用;回顾了实现运算功能的各种电路结构,比较了各类以模数转换器(ADC)为核心的量化技术;之后分析了现有存内计算架构面临的挑战并且给出了现有的解决策略,最后从不同方面展望存内计算技术。  相似文献   

10.
Cathode interfacial material (CIM) is critical to improving the power conversion efficiency (PCE) and long‐term stability of an organic photovoltaic cell that utilizes a high work function cathode. In this contribution, a novel CIM is reported through an effective and yet simple combination of triarylphosphine oxide with a 1,10‐phenanthrolinyl unit. The resulting CIM possesses easy synthesis and purification, a high T g of 116 °C and attractive electron‐transport properties. The characterization of photovoltaic devices involving Ag or Al cathodes shows that this thermally deposited interlayer can considerably improve the PCE, due largely to a simultaneous increase in V oc and FF relative to the reference devices without a CIM. Notably, a PCE of 7.51% is obtained for the CIM/Ag device utilizing the active layer PTB7:PC71BM, which far exceeds that of the reference Ag device and compares well to that of the Ca/Al device. The PCE is further increased to 8.56% for the CIM/Al device (with J sc = 16.81 mA cm?2, V oc = 0.75 V, FF = 0.68). Ultraviolet photoemission spectroscopy studies reveal that this promising CIM can significantly lower the work function of the Ag metal as well as ITO and HOPG, and facilitate electron extraction in OPV devices.  相似文献   

11.
公共信息模型在LDAP目录中的映射设计   总被引:2,自引:0,他引:2  
分布管理任务组(Distributed Management Task Force,DMTF)提出的公共信息模型(Common Information Model,CIM)是提高网络管理互操作的基础.介绍了CIM和轻量级目录访问协议(LDAP)的相关概念和发展现状,对CIM到LDAP的存储映射机制进行了阐述和分析.最后,给出了一个策略规则与系统关联的映射设计方案.  相似文献   

12.
Today many enterprises are forced to produce products which fulfill individual customer requirements. This situation results in an exploding number of variant parts of a product again resulting in a huge number of product data. To meet these new requirements, many enterprises introduce powerful CIM systems. Normally, this leads to heterogeneous EDP concepts which are characterized by autonomous CIM components, each with its own database. This paper illustrates how rule-based management of product data on the one hand significantly reduces the amount of product data and how rule-based management of product on the other hand allows to automate data exchange between several CIM components. One important consequence of this approach is that the integration of business-oriented and technical components within a CIM system is significantly improved.  相似文献   

13.
The Fusion program, a method for agile, flexible computer integrated manufacturing (CIM) at Motorola's Paging Products Group, is discussed. Fusion's CIM and automated assembly system can manufacture a wide variety of different products on the same production line. The development of the Fusion program and how it differs from its predecessor, the Bandit program, are described  相似文献   

14.
This paper presents & evaluates composite importance measures (CIM) for multi-state systems with multi-state components (MSMC). Importance measures are important tools to evaluate & rank the impact of individual components within a system. For multi-state systems, previously developed measures do not meet all user needs. The major focus of the study is to distinguish between two types of importance measures which can be used for evaluating the criticality of components in MSMC with respect to multi-state system reliability. This paper presents Type 1 importance measures that are involved in measuring how a specific component affects multi-state system reliability. A Monte Carlo (MC) simulation methodology for estimating the reliability of a MSMC is used for computing the proposed CIM metrics. Previous approaches (Type 2) have focused on investigating how a particular component state or set of states affects multi-state system reliability. For some systems, it is not clear how to prioritize system component importance, collectively considering all of its states, using the previously developed importance measures. That detracts from those measures. Experimental results show that the proposed CIM can be used as an effective tool to assess component criticality for MSMC. Examples are used to illustrate & compare the proposed CIM with previous multi-state importance measures.  相似文献   

15.
新一代信息技术与实体经济的加速融合将在CIM平台及其关联的应用体系中找到坚实落脚点。以尊重社会组成单元(个人、企业、政府机构等)需求为特点的科技创新正成为驱动城市发展的原始驱动力,知识驱动型社会正在加速形成,以人为本的新型城镇化正被加速推进,CIM为智慧社会的构建形成提供了城市载体。  相似文献   

16.
《IEEE network》1988,2(3):23-31
The distributed computing communication needs of computer-integrated manufacturing (CIM) are discussed. The capabilities of MAP/TOP (manufacturing automation protocol/technical and office protocol) as a communications architecture are examined. An example of how MAP/TOP operates in a hypothetical CIM enterprise is presented  相似文献   

17.
通用信息模型(cIM)为综合网络管理提供了一种通用的数据描述机制,其标准数据模型可以用来表示异构网络中的行种被管对象。论文在对综合网管系统的性能管理功能进行分析和归纳的基础上,采用面向对象的方法,基于CIM核心模型建^了一个综龠网管的性能管理模型框架,并在模型的文现方面给出了映射为Java代码和转换为CORBA IDL组件集合两种解决思路。  相似文献   

18.
Network Management Information Models   总被引:1,自引:0,他引:1  
In the first part of this paper, a basic introduction to network management is given and the demand for standards and models of management information is addressed. Existing and new network management standards are then classified, and an overview on the Common Information Model CIM and the Web-Based Enterprise Management WBEM is given. Furthermore, classes for a Network Security Service and finally a Firewall Policy Model are proposed. The proposals are CIM extensions for security management and are being discussed with the Distributed Management Task Force DMTF to become a standard.  相似文献   

19.
针对码索引调制(Code Index Modulation, CIM)相对于直接序列扩频在提升频谱利用率时,造成误比特率性能明显下降的问题,该文提出非正交-码索引调制(Non-orthogonal-Code Index Modulation, N-CIM)。发射端信息比特分割为伪随机(Pseudo Noise, PN)码映射块和调制信息块,并分别映射为PN码的索引和调制符号,调制符号的实部与虚部再选择相同的激活的PN码进行扩频。仿真与分析结果表明,在相同频谱效率时,N-CIM的误比特率性能比CIM在加性高斯白噪声信道中当误比特率为10–5时具备约2~3 dB的优势,在瑞利衰落信道中当误比特率为10–2时具备约2 dB的优势。  相似文献   

20.
随着现阶段码分多址(CDMA)网络业务的大力发展,软交换架构的综合关口局被大量采用。其具有CDMA网络寻址功能,所以组网方面更加复杂。根据CDMA综合关口局进行系统组网的工程实践,在了解综合关口局整体组网的基础上,介绍了综合关口局的会话初始化协议(SIP)组网方案,分析了SIP组网应遵循的基本技术要求,提出了SIP组网的应用场景。通过现场大话务量测试,得出SIP组网情况下软交换关口局的话务负荷正常和设备性能稳定。研究结果为CDMA综合关口局SIP组网提供了参考依据。  相似文献   

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