Abstract: A service deployment method determining an execution path of a to-be-deployed service, the execution path includes a first execution device and a second execution device; obtaining a first quality of service (QoS) of the first execution device; obtaining a second QoS of the second execution device; calculating a third QoS of the execution path based on the first QoS and the second QoS; obtaining a preset QoS of the to-be-deployed service; making a first determination that a first relationship between the third QoS and the preset QoS meets a preset rule; and deploying, in response to the first determination, the to-be-deployed service on the execution path.

Abstract: A method to control the cooldown of main heat exchangers in liquefied natural gas plant. The method provides for the automated control of a flow rate of a natural gas feed stream through a heat exchanger based on one or more process variables and set points. The flow rate of refrigerant streams through the heat exchanger is controlled by different process variables and set points, and is controlled independently of the flow rate of the natural gas feed stream.

Abstract: The invention relates to a low molecular weight sulfate chondroitin and a preparation method thereof. A low molecular weight chondroitin sulfate with the average molecular weight of less than 1000 Dalton can be obtained by a production process of chondroitin sulfate lyase degradation, deproteinization, filtration and sterilization and drying using macromolecular sulfate chondroitin as a raw material. The low molecular weight Chondroitin sulfate has a narrow molecular weight distribution range, the ratio of chondroitin sulfate disaccharide is 43˜60% and the ratio of chondroitin sulfate tetrasaccharide is 30˜45%, the sum of chondroitin sulfate disaccharide and chondroitin sulfate tetrasaccharide is more than 87%, the total oligosaccharide content of low molecular weight chondroitin sulfate is more than 97% and the protein content is less than 0.