This document provides alternative approaches and practices for design, operation, maintenance, integration, and interoperability, including distributed resources interconnection of stationary or mobile battery energy storage systems (BESS) with the electric power system(s) (EPS)1 at customer facilities, at electricity distribution facilities, or at bulk transmission electricity facilities. This standard involves BESSs and applications meeting the requirements of IEEE Std 1547(TM)-2018 on… read more distributed resource (DR) interconnection. IEEE Std 1547(TM)-2018, IEEE Std 2030-2011, and other IEEE standards related to DR or battery are indispensable for application of this standard. read less

定价： 66元 / 折扣价： 57 元

This standard establishes methods for quality assessment of 3D and UHD contents based on physiological mechanisms such as perceptual quality and visual attention. This standard identifies and quantifies the following causes and visual attention of perceptual quality degradation for 3D and UHD image and video contents: -- Compression distortion, such as multi-view image and video compression -- Interpolation distortion by intermediate-view rendering, such as 3D and UHD warping, view synthesis --… read more Structural distortion, such as bit errors on wireless/wired transmission errors -- Visual attention according to the quality degradation Key items are needed to characterize the 3D and UHD database in terms of the human visual system. These key factors are constructed in conjunction with the visual factors used to perceive quality and visual attention. read less

定价： 83元 / 折扣价： 71 元

定价： 66元 / 折扣价： 57 元

This part of IEC 60255 is for synchronized phasor measurement systems in power systems. It defines a synchronized phasor (synchrophasor), frequency, and rate of change of frequency measurements. It describes time tag and synchronization requirements for measurement of all three of these quantities. It specifies methods for evaluating these measurements and requirements for compliance with the standard under both static and dynamic conditions. It defines a phasor measurement unit (PMU), which can be a stand-alone physical unit or a functional unit within another physical unit. This document does not specify hardware, software or a method for computing phasors, frequency, or rate of change of frequency.

定价： 104元 / 折扣价： 89 元

This standard defines the general requirements and test methods for measuring conformance to ISO/IEC 9945-1 :1990 (IEEE Std 1003.1-1990) hereinafter referred to as "POSIX.1" {3}.1 It also defines the test assertions for measuring conformance to POSIX.1 {3}. This standard is intended for use by --Developers of POSIX.1 {3} test methods; --Implementors of POSIX.1 {3} implementations; --Application writers for POSIX.1 {3} conforming implementations; --POSIX.1 {3} testing laboratories; and --Otheres… read more interested in validating the conformance of a vendor-claimed POSIX.1 {3} implementation The purpose of this standard is to specify the test assertions and related test methods for measuring conformance of an implementation to POSIX.1 {3}. Testing conformance of an implementation to a standard includes testing the claimed capabilities and behavior of the implementation with respect to the conformance requirements of the standard. These test methods are intended to provide a reasonable, practical assurance that the implementation conforms to the standard. Use of these test methods will not guarantee conformance of an implementation to POSIX.1 {3}; that normally would require exhaustive testing, which is impractical for both technical and economic reasons. The technical specifications for a POSIX System Application Program Interface are defined in POSIX.1 {3}. IEEE Std 2003.1-1992 defines a means of measuring conformance to the POSIX.1 {3} technical specifications. Any question of interpretation of those technical specifications arising from the use of this standard is a question of interpretation of POSIX.1 {3}. read less

定价： 423元 / 折扣价： 360 元

定价： 428元 / 折扣价： 364 元

This document specifies general concepts in software testing and presents key concepts for the ISO/IEC/IEEE 29119 series.

定价： 81元 / 折扣价： 69 元

This standard covers the conformance test procedures for alternating-current high-voltage motor-starter fuses covered in the applicable American National Standards listed in 2.1. High-voltage motor-starter fuses are backup, current limiting fuses used in conjunction with high-voltage Class E2 motor starters. This standard does not cover installations under the exclusive control of electric utilities for the purposes of communication or metering, or for the generation, control, transformation,… read more transmission, and distribution of electric energy located in buildings used exclusively by utilities for such purposes, or located outdoors on property owned or leased by the utility or on public highways, streets, roads, and the like, or located outdoors by established rights on private property. read less

定价： 56元 / 折扣价： 48 元

This part of IEC 60079 specifies general and testing requirements for electrical resistance trace heaters for application in explosive atmospheres with the exclusion of those for EPL Ga and Da. This standard covers trace heaters that comprise either factory or field (work-site) assembled units, and which may be series trace heaters, parallel trace heaters, trace heater pads, or trace heater panels that have been assembled and/or terminated in accordance with the manufacturer's instructions. This standard also includes requirements for termination assemblies and control methods used with trace heating systems. The explosive atmospheres referred to in this standard are those defined in IEC 60079-10-1 and IEC 60079-10-2. Annexes D and E outline the application of this standard for those users applying the Division method of area classification. This standard supplements and modifies the general requirements of IEC 60079-0, except as indicated in Table 1. Where a requirement of this standard conflicts with a requirement of IEC 60079-0, the requirement of this standard takes precedence.

定价： 104元 / 折扣价： 89 元

This document defines assurance-related terms and establishes an organized set of concepts and relationships to form a basis for shared understanding across user communities for assurance. It provides information to users of the other parts of ISO/IEC/IEEE 15026 including the combined use of multiple parts. The essential concept introduced by ISO/IEC/IEEE 15026 (all parts) is the statement of claims in an assurance case and the support of those claims through argumentation and evidence. These claims are in the context of assurance for properties of systems and software within life cycle processes for the system or software product. Assurance for a service being operated and managed on an ongoing basis is not covered in ISO/IEC/IEEE 15026 (all parts). A variety of potential users of ISO/IEC/IEEE 15026 (all parts) exists including developers and maintainers of assurance cases and those who wish to develop, sustain, evaluate or acquire a system that possesses requirements for specific properties in such a way as to be more certain of those properties and their requirements. ISO/IEC/IEEE 15026 (all parts) uses concepts and terms consistent with ISO/IEC/IEEE 12207 and ISO/IEC/IEEE 15288 and generally consistent with the ISO/IEC 25000 series, but the potential users of ISO/IEC/IEEE 15026 (all parts) need to understand the differences from concepts and terms to which they may be accustomed. This document attempts to clarify these differences. The primary purpose of this document is to aid users of the other parts of ISO/IEC/IEEE 15026 by providing context, concepts and explanations for assurance, assurance cases and integrity levels. While essential to assurance practice, details regarding exactly how to measure, demonstrate or analyse particular properties are not covered. These are the subjects of more specialized standards of which a number are referenced and included in the Bibliography.

定价： 66元 / 折扣价： 57 元

This document provides guidelines for the life cycle management of systems and software, complementing the processes described in ISO/IEC/IEEE 15288 and ISO/IEC/IEEE 12207. This document: - addresses systems concepts and life cycle concepts, models, stages, processes, process application, key points of view, adaptation and use in various domains and by various disciplines; - establishes a common framework for describing life cycles, including their individual stages, for the management of… read more projects to provide, or acquire either products or services; - defines the concept and terminology of a life cycle; - supports the use of the life cycle processes within an organization or a project. Organizations and projects can use these life cycle concepts when acquiring and supplying either products or services; - provides guidance on adapting a life cycle model and the content associated with a life cycle or a part of a life cycle; - describes the relationship between life cycles and their use in applying the processes in ISO/IEC/IEEE 15288 (systems aspects) and ISO/IEC/IEEE 12207 (software aspects); - shows the relationships of life cycle concepts to the hardware, human, services, process, procedure, facility and naturally occurring entity aspects of projects; and - describes how its concepts relate to detailed process standards, for example, in the areas of measurement, project management and risk management. read less

定价：

This document provides guidance for the life cycle management of systems and software, complementing the processes described in ISO/IEC/IEEE 15288 and ISO/IEC/IEEE 12207. This document:--addresses systems concepts and life cycle concepts, models, stages, processes, process application, key points of view, adaptation and use in various domains and by various disciplines;--establishes a common framework for describing life cycles, including their individual stages, for the management of projects… read more that provide or acquire either products or services;--defines the concept of a life cycle;--supports the use of the life cycle processes within an organization or a project; organizations and projects can use these life cycle concepts when acquiring and supplying either products or services;--provides guidance on adapting a life cycle model and the content associated with a life cycle or a part of a life cycle;--describes the relationship between life cycles and their use in applying the processes in ISO/IEC/IEEE 15288 (systems aspects) and ISO/IEC/IEEE 12207 (software systems aspects);--shows the relationships of life cycle concepts to the hardware, human, services, process, procedure, facility and naturally occurring entity aspects of projects;--describes how its concepts relate to detailed process standards, for example, in the areas of measurement, project management, risk management and model-based systems and software engineering. read less

定价： 103元 / 折扣价： 88 元

The body of the standard describes the modeling language (syntax and semantics) that supports the IDEF0 method for developing graphical representations of a system or subject area. The clauses that follow govern the physical construction of IDEF0 models that represent functions, functional relationships, and the physical and data objects required by those relationships. This part of the document is divided into 10 clauses. Clause 1 provides an overview of this part of the standard. Clause 2… read more defines key terms. Clause 3 discusses the concept of an IDEF0 model. Clause 4 defines the syntax of the IDEF0 language. Clause 5 defines the semantics of the language. Clause 6 describes the different types of IDEF0 diagrams. Clause 7 presents the different types of IDEF0 model pages. Clause 8 provides details on the various features of an IDEF0 diagram. Clause 9 defines IDEF0 reference expressions. Finally, Clause 10 defines IDEF0 diagram feature references. Documentation of best commercial practices and guides to recommended usage are beyond the scope of this document. read less

定价： 292元 / 折扣价： 249 元

a. Clause 4.10.4 the ratio of zero and positive sequence currents in single phase capacitive switching procedure should be less than 3.0 rather than greater than 3.0. b. Errors in clause 4.10.9.1.8 and 4.10.9.2.7 regarding reference to the procedure for separate making tests. c. 4.10.9.1.3 change in punctuation for clarity d. Throughout document unify terms for rated voltage, including in equations to use "Ur" rather than "V" f. Clause 4.1.2 i) is missing some words required for clear meaning.… read more g. Correct references and terms used by both C37.04 and C37.09 so they are identical h. Remove classification of tests in the Scope as only design tests are covered. i. Clauses 4.5.7 and 4.5.8.1 to make clear that average of the test impulses shall be equal or higher than rated value j. clarify in 4.8.2.7. which tests to be performed at minimum control voltage k. Correct item list in 4.8.2.3.3 l. Correct title of Figure 3 and correct Figure 4 (example for incorrect grounding condition given) m. Correct arcing window/multiplier in Table 5 n. Correct item list in 4.8.5.4.3 o. correct the steps of electrical degrees for capacitance switching duties in 4.10.9.2.7 (30° for single- and 10° for three phase) p. further minor items depending upon agreement in the WG read less

定价： 0元 / 折扣价： 0 元

This standard defines several media independent services (MIS); handover, home energy management system (HEMS), software-defined radio access networks (SDRANs), radio resource management (RRM), and device-to-device (D2D) communication that shall be implemented in conjunction with the MIS framework as defined in IEEE Std 802.21™-2017 to optimize the performance of such services.

定价： 207元 / 折扣价： 176 元