This standard defines a conceptual model for interpreting externalized representations of digital aggregations of resources for learning, education, and training. The conceptual model defines a set of concepts and the relationships among them and is expressed as a formal ontology. Internal compositions and uses of digital resources are not specified nor are processing methods for resource aggregations.

定价： 183元 / 折扣价： 156 元

This Standard defines a data model for describing, referencing, and sharing competency definitions, primarily in the context of online and distributed learning. This Standard provides a way to represent formally the key characteristics of a competency, independently of its use in any particular context. It enables interoperability among learning systems that deal with competency information by providing a means for them to refer to common definitions with common meanings. This Standard enables… read more information about competencies to be encoded and shared. This Standard does not define whether a competency is a skill, knowledge, ability, attitude, or learning outcome, but it can be used to capture information about any of these. Policies regarding reusable competency definitions (RCDs), such as the best practice to look for an existing definition to reuse instead of inventing a new one for the same purpose, are outside of the scope of this Standard. read less

定价： 134元 / 折扣价： 114 元

This standard provides a detailed description of interfaces and service access points defined in the baseline, IEEE Std 1900.4TM, enabling distributed decision making in heterogeneous wireless networks and obtaining context information for this decision making.

定价： 191元 / 折扣价： 163 元

This document defines a standard for a formal language to specify policies for radio devices that use cognitive patterns in their operating behavior. IEEE Std 1900.5-2011 defines cognitive radios as a type of radio in which the device is aware of the radio's environment (which can include location, time, or other operational parameters related to communication systems) and internal state and can make decisions about the radio operating behavior based on that information and predefined… read more objectives. To facilitate productive, cooperative behavior in a dynamic ecosystem of communicating devices, the process of decision-making in cognitive radios requires dynamically adaptable guidelines, expressed as policies. Adaptive knowledge capturing, organization, representation, and reasoning is required as environmental awareness and dynamic, objective-steered, decision-making cannot be achieved on a basis of static data and procedures. This standard uses ontological modeling in conjunction with logic rules to provide the informational basis for knowledge representation and entailing statements for cognitive radios. Among other desired operating features that provide significant enhancements over classic hardware-defined radios, cognitive radios are capable of dynamically assessing and accessing available spectrum in wireless communications. A set of base policies augmented by dynamic updates serves as foundation for a cognitive behavior. Dynamic updates solicited by the local device or received asynchronously by other remote cognitive radios can result in local policy and data amendments. Evidently, cognitive radios need to operate under real-time conditions. Therefore, all computational processes involved in information processing including cognition relevant algorithms and their respective underlying structures are required to facilitate these operating requirements in terms of efficiency and effectiveness. read less

定价： 172元 / 折扣价： 147 元

This standard specifies a suite of conformance tests for system-level requirements of Ethernet Passive Optical Network (EPON) equipment, defined in IEEE 1904.1 Package B.

定价： 136元 / 折扣价： 116 元

This standard specifies a suite of conformance tests for system-level requirements of Ethernet Passive Optical Network (EPON) equipment, defined in IEEE 1904.1 Package C.

定价： 198元 / 折扣价： 169 元

This standards identifies terms and concepts pertinent to the resolution of the Year 2000 issue and provides definitions of these terms and description of these concepts.

定价： 141元 / 折扣价： 120 元

This standard specifies requirements for interoperability of devices utilized within utility control systems, which implement the Internet Protocol Security (IPsec) protocol suite within an IPv4 environment.

定价： 59元 / 折扣价： 51 元

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

This guide explains and clarifies the contents of each section of an SQAP that satisfies the requirements of IEEE Std 730-1989 . The guide supersedes IEEE Std 983-1986 and does not constitute further requirements than those stated in IEEE Std 730-1989 . An organization can claim compliance with IEEE Std 730-1989 without following this guide completely.

定价： 68元 / 折扣价： 58 元

This standard specifies radio technology independent methods for network-based coexistence among dissimilar or independently operated networks of unlicensed devices and dissimilar unlicensed devices. The standard is defined for geolocation-capable devices operating under general authorization such as television white spaces (TVWS), the 5 GHz license-exempt bands, and the general authorized access in the 3.5 GHz bands.

定价： 369元 / 折扣价： 314 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(TM)-2017 to optimize the performance of such services.

定价： 260元 / 折扣价： 221 元

定价： 151元 / 折扣价： 129 元

This guide provides information of special relevance to planning, design, testing, installation, operation and maintenance of gas-insulated substations (GISs) and equipment. This guide is intended to supplement IEEE Std C37.122(TM). This guide is applicable to all GISs above 52 kV. However, the importance of topics covered varies with application category. For example, the issues related to advanced field test techniques and very fast transients (VFT) are of particular interest for extra-high voltage (EHV) GISs.

定价： 141元 / 折扣价： 120 元