This paper proposes a specific architecture of campus security management system based on WCF service of SOA and RFID technology, aiming at meeting the security and scalability requirement of the distributed environment of campus security management system. With the help of WCF service models, the underlying interaction among database, data access layer, RFID device information transaction and business logic processing are packaged seamlessly. Then the WCF service models provide platform-independent service to .Net MVC Framework Controller, which could be replaced by any type of caller, separating the presentation and implementation of this system. Because of the advantages of reducing the degree of coupling and greatly enhancing the security, scalability and reliability of the system, this architecture has been one of the recommended trends of software architecture.
This paper introduces a kind of round shape transformer for phase shifting and composing 24-step output voltage in inverter systems. It is proved that with the transformer the harmonics below the 25 th are eliminated at the output. The paper also discusses critical problems that should be considered before round shape transformers being designed and manufactured. The experiments on the prototype included in a multiple inverter system are carried out. The result shows the validity of the transformer in terms of waveform improvement. The performances of the inverter with the round shape transformer are investigated and primary assessments are made.
This paper designed a 3/12 phase circular phase shifting transformer applied to multi-pulse rectifier. The transformer is built by using rotating magnetic field principle, and the ferromagnetic structure is similar to an induction motor. Compared with the general column iron core phase shifting transformer, the circular phase shifting transformer has the advantages of compact structure, more symmetric magnetic circuit, and the design of primary and secondary winding is more simple. This paper established the mathematical model of the circular shifting transformer, the voltage equations are derived. Then analysis the inhibitory effect of harmonic wave in 24 pulse rectifier. Verify the feasibility of the circular phase shifting transformer through the experiment, when the circular phase shifting transformer is applied to multi-pulse rectifier, it is effective to suppress the harmonic wave of the Power grid.
Intelligent warehouse management can effectively improve the work efficiency and decreasing operating costs for a company, and the reasonableness of warehouse layout has played a very important role in it. This paper will aim at the warehouse layout problem, analyze the superiority of genetic algorithm and dynamic programming for the problem, and base on the genetic algorithm, integrating the thoughts of dynamic programming to put forward an optimization strategy. It can improve the accuracy and efficiency of genetic algorithm by a modified encoding scheme and fitness function, in order to put forward a more optimal scheme of warehouse layout, provide the information base for following operation of warehouse management, and improve the intelligent level of warehouse management system.
It is begin with the defining features of the embedded system,and then presented the system's developmental trend and applications,followed by a discussion of the development of the system design technology in current use.Also touched upon are the challenges that arise from the embedded system design,such as the design of the SOC,the instruments used and some environmental problems.
The role of social responsibility in kindergartens is critical for fostering parental loyalty, especially amid declining enrollment rates in China. However, the relationship between kindergarten social responsibility, brand trust, perceived value, and parental loyalty is not well understood. This study investigates the influence of kindergarten social responsibility on parental loyalty, focusing on the mediating roles of brand trust and perceived value. A nationwide survey was conducted, collecting 745 valid responses from parents across 27 provinces in China. Data were analyzed using the PROCESS macro, with mediation effects tested via the bias-corrected nonparametric percentile bootstrap method. The findings reveal that kindergarten social responsibility significantly enhances parental loyalty both directly and indirectly through brand trust and perceived value. Brand trust was identified as the strongest mediator, particularly in non-inclusive kindergartens, where its effect on loyalty was more pronounced. The study also found that parents with higher education levels and higher income tend to have lower perceptions of social responsibility and perceived value, affecting their loyalty. These results suggest that kindergartens must tailor their social responsibility strategies to different parent demographics and kindergarten types to maximize parental loyalty. The study emphasizes the importance of social responsibility in strengthening parental loyalty, with specific implications for inclusive and non-inclusive kindergartens. By understanding the mediating roles of brand trust and perceived value, kindergartens can develop targeted strategies to improve competitiveness and parental engagement.
In this paper, we select the quadrotor as the airbone geophysical exploration platform.By comparing the current quadrotor control algorithm, the classical closed-loop PID theory is selected.And then the platform flight control system is divided into three control loops, that is, position control loop, attitude control loop, and rotation speed control loop, which are respectively designed PID controller.The results that the controller simulated in the MATLAB / Simulink platform verify the effectiveness of the designed controller.
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