摘要：介绍了一种MIPS体系结构下,北桥在SDRAM的操作规范下控制dual port RAM的新型系统结构设计方案,结合实际实现过程,较清楚地突出了设计的创新点,并介绍了测试结果,结论是该设计完全适用于MIPS系统下的数据交换系统,达到了国外同类产品的速度性能要求。

摘要：主要介绍了如何使用端口复用技术来实现MES系统(气象与环境监测系统)辐射数据采集软件的数据采集。I/O完成端口(I/O completion port)是一种能够帮助程序设计人员创建高性能而且伸缩性好的应用程序的技术,微软公司提供的这种技术可以让线程在读取和写入设备的时候不必等待设备(套接字、串口、匿名管道等)的响应,从而显著地提高吞吐量。将该技术应用于核电厂MES系统的数据采集,可以实现通过一个网络端口和少量的worker子线程采集到多个监测子站的辐射监测数据,解决了并发式服务器无法支持较多客户端连接以及系统Socket资源有限等问题。该技术在广西防城港、浙江三门等多个核电厂气象与环境监测系统中得到应用,为加快推进核电设备国产化,实践"中国制造2025"做出了有益的探索和努力。

摘要：Aim To design the home -made embedded real time operating system COSIX V2.O/RT developing platform,the Mach operating system interprocess communication mech- anism based on object-oriented technique was analyzed. Methods Not only being the trans-mission channel,but also being the abstract of all the entity in the Mach operating *** play the most important role in Mach IPC(interprocess communication).ports were de-vided into 4 types: system ports, privileged ports user ports and kernel *** these ports'creation,run and kill processes and the message transmission in IPC were *** IPC has been widely used in Client/Server run *** and unpacking inmessage transmission must restrict the run efficiency of IPC Conclusion To enhance IPC runefficiency and at the same time enhance the operating system's run efficiency,some of thesystem calls should be rewritten and implemented with trapped mode in *** the end the aim of designing real time operating system is achieved.

摘要：文章分析了芭蕾舞arabesque舞姿和port de bras旋转,通过活动或静止的方式,运用现代、古代风格和中国特色的动作设计,实现对人物内在心理和情感的表达,让观众品味视觉艺术,唤醒其审美意识,展现中外舞蹈文化艺术的特色。

摘要：With the rapid development of integrated circuits [1], low power consumption has become a constant pursuiting goal of the designer in chip design. As the memory almost takes up the area of the chip, reducing memory power consumption will significantly reduce the overall power consumption of the chip;according to ISSCC’s 2014 report about technology trends discussions, there two points of the super-low power SRAM design: 1) design a more effective static and dynamic power control circuit for each key module of SRAM;2) ensure that in the case of the very low VDD min, SRAM can operating reliably and stably. This paper makes full use reliable of 8T cell, and the single-port sense amplifier has solved problems in the traditional 8T cell structure, making the new structure of the memory at a greater depth still maintain good performance and lower power consumption. Compared with the designed SRAM the SRAM generated by commercial compiler, as the performance loss at SS corner does not exceed 10%, the whole power consumption could be reduced by 54.2%, which can achieve a very good effect of low-power design.

摘要：Aim: This paper discusses the design and Finite Element Analysis (FEA) of a Percutaneous Aor-tic Valve Stent. The aim of this study was to model a percutaneous aortic valve stent and subject it to finite element analysis. The design process was carried out to meet the functional and surgical requirements. Methods and Results: Analysis was done with different materials with loads ranging from 50 kgf/mm²to 73 kgf/mm². These forces were selected because these val-ues are far greater than the normal human blood pressure which ranges from 10kPa to 16kPa. It was also to understand the mechanical behavior of different stent materials under such high pressures. A stent model was generated and its physical, mechanical and behavioral properties were studied. Finite element analysis and simulation of the model enhanced the designer to optimize the geometry suitable for perform-ance during and after implantation. The design objective for the stent is to have long term du-rability, low thrombogenicity, resistance to mi-gration and paravalvular leak. Conclusion: The analysis performed in this paper may aid in understanding the stent’s tolerable pressures ranges in comparison with the physiological pressures exerted by the heart and cardiac blood flow during abnormal cardiovascular conditions.

摘要：SPI是一种高速、全双工、同步的串行通信接口.由于其简单易用的特性,现在越来越多的外围芯片集成了这种通信协议.但在实际应用中有相当一部分MCU因为自身不具备SPI接口而限制了其在SPI总线器件中的使用,出于产品体积、成本和可扩展性等方面的考虑,设计人员往往希望使用不具备SPI接口的MCU去控制具备SPI接口的外围器件.笔者介绍了SPI总线的特征和时序,给出了利用I/O port软件方式模拟三线SPI通信时序以实现串行通信的方法和程序流程.

摘要：介绍一款自主研发的三层以太网交换机SW 224的组播方案的设计与实现.针对我们的IP宽带社区接入网的应用要求,将三层以太网交换机的二层域组播和三层域组播有机地结合起来,以更为灵活的方式实现组播功能,并利用交换机的硬件支持,通过优化驱动算法等手段保证IP组播的服务质量.

摘要：本文介绍利用TMS320VC5402中主机接口HPI实现与主机通信,不需要增加太多额外的硬件设备和软件开销,外部主机通过HPI口对DSP系统的RAM进行访问,不会影响DSP的其它处理过程。实现了一种TMS320VC5402DSP与AT89C51单片机通信的硬件连接方案和软件实现方法,给出了部分程序代码。实验结论证明这种方案可行、有效,对于一些复杂系统的设计具有很好的借鉴意义。

摘要：在芭蕾教学中,学生下身及脚下的训练一直是重中之重,但对上身及手臂的练习极为缺乏。笔者认为,芭蕾舞者的表演,除了要具备极为有修养的脚下功夫,上身及手臂的训练也应如此。由于占绝大多数的普通观众,对芭蕾的认知相对浅薄,所以常常"关注点"多集中于芭蕾舞者的上身,而只有少数的观众才会注重芭蕾舞者的脚下功夫。平日芭蕾教学中对脚下功夫严谨训练的同时,上身及手臂的练习也绝不可以被轻易忽视。