定价： 元 加购物车

Precipitators and baghouses are two systems designed to remove fly ash from boiler flue gas. Air pollution control regulations require that these precipitators and baghouses operate efficiently and reliably. Malfunctions or equipment failures could lead to boiler de-rating or complete shutdown, which increase the operation and maintenance expenses for the operating company. Problems related to fly ash collection in the hoppers, such as fly ash agglomeration and fly ash solidification, can lead… read more to precipitator and baghouse shutdowns. The proper design and installation of hopper heating systems can significantly reduce the maintenance problems associated with fly ash plugging in hoppers. read less

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This Standard is intended as a guide for the industry in the determination and presentation of test data and ratings of magnetic amplifiers. While these Standards are intended mainly for self-saturating linear and/or bistable magnetic amplifiers, appropriate items may be applied to simple saturable reactor circuits. It is not the intent of this Standard to require a certain fixed number of ratings or tests for the complete specification of a particular amplifier; rather it is the intent to… read more standardize the most common ratings and tests so that when they are applied by the equipment manufacturer or by the user, the significance of the rating or test will always be the same. read less

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Provide the industry with a generic specification, including design and testing, for transmission modular restoration structure components being widely used today by many electric utilities.

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This guide will provide the industry with a generic specification, including design and testing, for transmission modular restoration structure components.

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This application guide provides recommendations and guidance on safety considerations for the planning, training and installation of ETRS as part of a restoration program. In addition, this guide outlines key elements to the proper maintenance and storage of restoration structures.

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The scope of this project is to define a nomenclature for communications of information from point-of-care medical devices. Primary emphasis is placed on acute care medical devices and patient vital signs information. The nomenclature also supports concepts in an object oriented information model that is for medical device communications.

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This standard provides a process for creating a software project life cycle process (SPLCP). It is primarily directed at the process architect for a given software project. It is the function of the process architect to develop the SPLCP. This methodology begins with the selection of an appropriate software project life cycle model (SPLCM)for use on the specific project. It continues through the definition of the software project life cycle (SPLC),using the selected SPLCM, the activities… read more provided in Annex A, and the portion of the software life cycle that is relevant to the project. The methodology concludes with the augmentation of the software life cycle with organizational process assets (OPAs) to create the SPLCP. The activities that are provided in Annex A cover the entire life cycle of a software system, from concept exploration through the eventual retirement of the software system. This standard does not address nonsoftware activities, such as contracting, purchasing, or hardware development. It also does not mandate the use of a specific SPLCM, nor does it provide a selection of, or a tutorial on, SPLCMs. This standard presumes that the process architect is already familiar with a variety of SPLCMs, with the criteria for choosing among them and with the criteria for determining the attributes and constraints of the desired end system and the development environment that affects this selection. Finally, this standard does not prescribe how to perform the software activities in Annex A. read less

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定价： 元 加购物车

This standard defines standard practices for synthesizing binary digital electronic circuits from VHDL source code. It includes the following: a) The hardware interpretation of values belonging to the BIT and BOOLEAN types deÞned by IEEE Std 1076-1993 and to the STD_ULOGIC type defined by IEEE Std 1164-1993. b) A function (STD_MATCH) that provides "don't care" or "wild card" testing of values based on the STD_ULOGIC type. c) Standard functions for representing sensitivity to the edge of a… read more signal. d) Two packages that deÞne vector types for representing signed and unsigned arithmetic values, and that define arithmetic, shift, and type conversion operations on those types. This standard is designed for use with IEEE Std 1076-1993. Modifications that may be made to the packages for use with the previous edition, IEEE Std 1076-1987, are described in 7.2. read less

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The standard describes a standard syntax and semantics for VHDL RTL synthesis. It defines the subset of IEEE 1076 (VHDL) that is suitable for RTL synthesis and defines the semantics of that subset for the synthesis domain. The intent of this revision is to include a maximum subset of VHDL that can be used to describe synthesizable RTL logic. This includes considering new features introduced by IEEE Std 1076-1993, IEEE Std 1076-2002, new semantics based on algorithmic styles rather than template-… read more driven, and a set of synthesis attributes that can be used to annotate an RTL description. read less

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定价： 元 加购物车

定价： 元 加购物车

The Subsystem Bus of the IEC 821 BUS (IEC 821-1987 [2],1 henceforth referred to as the VSB) is a local subsystem extension bus. It allows a processor board to access additional memory and I/O over a local bus, removing traffic from the global bus and improving the total throughput of the system. The system has been conceived with the following objectives: 1) To improve the performance of multiprocessor systems by allowing the design of local subsystems. 2) To specify the electrical… read more characteristics required to design boards that will reliably transfer data over the VSB. 3) To specify the mechanical requirements to be compatible with VSB systems. 4) To specify protocols that precisely define the interaction between the VSB and devices interfaced to it. 5) To provide terminology and definitions that describe VSB protocols read less

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To correct printing errors causing dimensional relationships to be misunderstood.

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