Abstract: Threshold distributed elliptic curve key generation and signature system and method are disclosed where nodes can generate their own key pairs without the participation of a trust center, each node can process its own key pair according to a secret sharing protocol, complete conversion of the (n, n) threshold to the (t, n) threshold, after determining t signature node, generates a (t, t) threshold private key according to a threshold logic, complete mapping of ptki to ptki?, and according to a signature logic, use ptki? to complete the communication and calculation in the signature protocol, store the relevant calculation results, and complete an overall signature.

Abstract: The present disclosure provides a method and system for decentralized digital asset storage and transfer. An exemplary system includes a platform including at least three dedicated and computationally independent computing nodes, and a first access gateway communicably coupled to the platform. The platform is configured to, upon receipt of a digital asset storage or transfer instruction via said first access gateway, perform a method including: performing, by each said node independently, a verification process in respect of said instruction to determine a verification result, and broadcasting said verification result thereof to the other nodes; determining a consensus between verification results determined by said nodes; and in the event of a consensus, each node processing said instruction, independently of said other nodes.

Abstract: A new type of progressive cavity compressor is intended primarily for 3 to 10 ton vapor-cycle air conditioning systems. Major working section elements include a rotor, a stator, inlet ports, an outlet endplate, and outlet check valves. The helical rotor is driven in an eccentric orbital path inside the helical stator. In the preferred embodiment, the rotor and stator helices have varying (non-uniform) pitch in the working section. Rotor-stator running clearances are tight, to minimize leakage. Two outlet check valves regulate refrigerant discharge flow and pressure. Efficient compression is provided over a wide range of compression ratios, corresponding to a wide range of ambient temperatures in an air conditioning application. The invention can improve the energy efficiency of air conditioning systems, especially at off-design conditions.

Abstract: A new type of progressive cavity compressor is intended primarily for 3 to 10 ton vapor-cycle air conditioning systems. Major working section elements include a rotor, a stator, inlet ports, an outlet endplate, and outlet check valves. The helical rotor is driven in an eccentric orbital path inside the helical stator. In the preferred embodiment, the rotor and stator helices have varying (non-uniform) pitch in the working section. Rotor-stator running clearances are tight, to minimize leakage. Two outlet check valves regulate refrigerant discharge flow and pressure. Efficient compression is provided over a wide range of compression ratios, corresponding to a wide range of ambient temperatures in an air conditioning application. The invention can improve the energy efficiency of air conditioning systems, especially at off-design conditions.