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This guide provides information on selection, sizing, installation design, installation, maintenance, and testing of stationary standby batteries used in uninterruptible power supply (UPS) systems having an ac output. Design requirements of the UPS components are beyond the scope of this document. While this document applies to all UPS systems, it may be impractical to implement some of its guidance and recommendations with small, self-contained systems, such as products intended to back up individual personal computers.

定价： 116元 / 折扣价： 99 元

This standard defines a baseline architectural framework and defines functional roles for blockchain-driven supply chain finance (SCF) implementations based on the account payable, e.g., core enterprise, supplier, bank, blockchain platform provider and so on. In addition, this standard outlines use cases and business flows for SCF based on blockchain, and specifies the functional implementation and security requirements.

定价： 59元 / 折扣价： 51 元