船舶專業外文翻譯--船舶設計優化-其他專業(編輯修改稿)

　

【文章內容簡介】 nufacturing environment has always been characterized by unpredictability. Today39。s manufacturing systems are based on idealized models where unpredictability is not taken into account but handled using plex and expensive logistics and buffering systems. Manufacturers are also being aware that one of the results of the topdown serial approach is an alienation of human workers. For example, some of the car manufacturers have experimented with having teams of human workers responsible for a particular car rather than performing repetitive operations in a production line. This model in fact better reflects the concurrency of the manufacturing process than the assembly line. 5 A Decision Support Tool for Ship Design Optimization Large ships are, together with aircraft, some of the most plex things ever built. A container ship consists of about million atomic ponents which are assembled in a hierarchy of increasingly plex ponents. Thus any support tool for the manufacturing process can be expected to be a large HPCN application. Ships are designed with both functionality and ease of construction in mind, as well as issues such as economy, safety, insurance issues, maintenance and even demissioning. Once a functional design is in place, a stepwise deposition of the overall design into a hierarchy of manufacturing ponents is perfor med. The manufacturing process then starts with the individual basic building blocks such as steel plates and pipes. These building blocks are put together into ever more plex structures and finally assembled in the dock to form the finished ship. Thus a very useful thing to know as soon as possible after design time are the manufacturing consequences of design decisions. This includes issues such as whether the intermediate structures can actually be built by the available production facilities, the implications on the use of material and whether or not the production can be efficiently scheduled [7]. . shows schematically how a redesign decision at a point in time during construction implies future costs, only some of which are known at the time. Thus a decision support tool is required to give better estimates of the implied costs as early as possible in the process. Simulation, both of the feasibility of the manufacturing tasks and the efficiency with which these tasks can be performed using the available equipment, is a very puteintense application of simulation and optimization. In the next section, we describe how a decision support tool can be designed and implemented as a parallel application by modeling the main actors in the process as agents. . Economic consequences of design decisions. A design decision implies a future mitment of economic resources which is only partially known at design time. 6 MultiAgent Systems The notion of a software agent, a sort of autonomous, dynamic generalization of an object (in the sense of Object Orientation) is probably unfamiliar to the typical