Discrete droplet transport has drawn much interest in a broad range of applications.

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Against the T-joint connection problem, the CO2 laser and TIG arc hybrid welding Experiment Platform is set up. The implemented T-joint titanium alloy connection test adopts a novel fashion that while welding the upside of the sheet the bilateral back formed well. The preferred solution is presented based on studies such as arrangement of heat source, wire feeding, shielding gas selection and gap adaptability. The results reveal that the technology provides a new efficient method for the T-joint titanium alloy connection.

Abstract. This paper builds an efficient agent-based flexible scheduling for real-world manufacturing systems. Considering the alternative processes and alternative machines, the allocation of manufacturing resources is achieved through negotiation among the job and machine agents in a multi-agent system (MAS). Ant Colony Intelligence (ACI) is proposed to be combined with Contract Net Protocol (CNP) so as to make agents adaptive to changing circumstances. ACI is integrated into both machine agents and job agents to solve the task allocation and sequencing problem. CNP is introduced to allow the agents to cooperate and coordinate their local schedules in order to find globally near-optimal robust schedules. The negotiation protocol is an interactive bidding mechanism based on the hybrid contract net protocol. The implementation of the issues using CNP model is discussed. Experimental results verify the effectiveness and efficiency of the proposed algorithm integrated with ant-inspired coordination. IntroductionFlexible job-shop scheduling problem (FJSP) is an extension of the classical job-shop scheduling problem (JSP) which allows an operation to be processed by any machine from a given set. This study aims at building an efficient agent-based flexible scheduling model for real-world manufacturing systems with various products and processes. In consideration of the alternative processes and alternative machines, the actual selection of the schedule and allocation of manufacturing resources is achieved through negotiation among the job and machine agents in a multi-agent system.A MAS not only provides parallel execution of commands but also has the intelligence of negotiation to enhance system performance. A hybrid algorithm is developed to support MAS architectures. This new negotiation protocol enables multi-task many-to-many negotiations, where global control is incorporated into the decentralized negotiation. In this work, ACI is proposed to be combined with local agent coordination so as to make autonomous agents to give rise to efficient global performance.The structure of this paper is as follows: in section 2, the ant colony intelligence, especially ant colony intelligence-based approach in flexible manufacturing system is presented. The definition of contract net protocol and the combination of ACI and CNP is given in section 3. Section 4 presents a case study of FJSP, also the results analysis and discussion are given. Finally, conclusions and ideas for future work are presented in section 5.

The position and application of hydraulic system on the engineering machinery are analyzed while the current situation and application of electric technology are discussed. A new idea is proposed in which the end effectors are driven by electric motors while the restriction of hydraulic system is taken over. Several key problems are analyzed during the refitting of engineering machinery such as the high-power, the distribution and focus of energy, the source of energy and the redesign of the control system. The detail is discussed with the Komatsu excavator PC200-8. The advantages of electric engineering machinery are also summarized.