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BIM technology has changed the traditional modeling thinking, realized the technological innovation of three-dimensional to multi-dimensional information modeling, and truly realized collaborative design. Through the promotion and application of technology, it has become an effective auxiliary tool for owners in the decision-making stage, and the necessary ability for design and construction units to undertake large projects. At present, foreign scholars pay more attention to the interdisciplinary and cross-domain comprehensive application of BIM technology to realize overall management in various aspects and to realize all-round cooperative work in various construction stages, various specialties and during operation. At present, foreign BIM technology is mainly applied to construction, design and operation management in subway.LINUX: Redhat uses the variable tcp_synack_retries to define the number of retransmissions, which defaults to 5, with a total timeout of 3 minutes.一边是彼此认定相互珍惜的新家人，一边是无法选择关系淡漠的亲生父母，他们艰难抉择却还是顾此失彼。他们不想新家人受到伤害，也不想人生被拖向深渊。大局已定，杨长帆才终于与家人拥抱团聚。OVR trains N classifiers by taking samples of one class as positive examples and samples of all other classes as counterexamples at a time. If only one classifier predicts a positive class during the test, the corresponding class mark will be taken as the final classification result. As shown in FIG. 3.4, if multiple classifiers predict as positive classes, the prediction confidence of each classifier is usually considered, and the category mark with the largest confidence is selected as the classification result.Physical Critical Hit Rate Treasure Pearl