基于C8051F330的机动车速度监测及无线传输系统

为实现对高速公路机动车行驶速度的全程监测及预警,设计了一种以C8051F330为控制核心的机动车速度监测及无线传输系统;详细叙述了系统设计原理与软硬件的实现方法,系统利用C8051F330单片机控制传感器实时采集机动车行驶速度信号并进行处理,通过RFID标签和读写器无线传输车辆速度、身份信息以及前方路况限速信息,从而实现对高速公路机动车速度的实时监测和预警功能;实验调试表明系统反应速度快、运行可靠且成本低,具有良好的应用前景.     

A leakage-aware L2 cache management technique for producer-consumer sharing in low-power chip multiprocessors

This paper proposes a novel leakage management technique for applications with producer-consumer sharing patterns. Although previous research has proposed leakage management techniques by turning off inactive cache blocks, these techniques can be further improved by exploiting the various run-time characteristics of target applications in CMPs. By exploiting particular access sequences observed in producer-consumer sharing patterns and the spatial locality of shared buffers, our technique enables a more aggressive turn-off of L2 cache blocks of these buffers. Experimental results using a CMP simulator show that our proposed technique reduces the energy consumption of on-chip L2 caches, a shared bus, and off-chip memory by up to 31.3% over the existing cache leakage power management techniques with no significant performance loss.     

On the convective nature of the instability of a front undergoing a supercritical Turing bifurcation

Fronts are traveling waves in spatially extended systems that connect two different spatially homogeneous rest states. If the rest state behind the front undergoes a supercritical Turing instability, then the front will also destabilize. On the linear level, however, the front will be only convectively unstable since perturbations will be pushed away from the front as it propagates. In other words, perturbations may grow but they can do so only behind the front. It is of interest to show that this behavior carries over to the full nonlinear system. It has been successfully done in a case study by Ghazaryan and Sandstede [A. Ghazaryan, B. Sandstede, Nonlinear convective instability of Turing-unstable fronts near onset: a case study, SIAM J. Appl. Dyn. Syst. 6 (2007) 319–347]. In the present paper, analogous results are obtained for the same system as in Ghazaryan and Sandstede (2007), but for a different parameter regime.     

General linear methods for ordinary differential equations

General linear methods were introduced as the natural generalizations of the classical Runge–Kutta and linear multistep methods. They have potential applications, especially for stiff problems. This paper discusses stiffness and emphasises the need for efficient implicit methods for the solution of stiff problems. In this context, a survey of general linear methods is presented, including recent results on methods with the inherent RK stability property.     

半自动生化分析仪中生化参数检测系统的设计

为了实现生化参数的精确检测,采用分光光度法检测样品对某种单色光的吸收程度,并根据反应过程中样品吸光度的变化来计算样品中待测成分的含量,从而得出检验结果。首先,入射光由光电二极管转换成微弱电流信号;然后信号经调理放大、模数转换后,送入单片机进行处理;最后,通过网络端口将测试结果传输给上位机（PC）进行处理,由上位机显示并生成数据报表。实验表明,该系统检测结果可靠、系统结构简单、使用方便。     

汽车电动助力转向器的控制器研制

研究了日本N4样机的电动助力转向系统的电机电流-输入扭矩特性.采用ATmega16L单片机为处理器,以直流有刷电机为执行器,应用PID补偿算法,设计了电动助力转向控制器.在试验台上进行了电机电流-输入扭矩特性试验,试验结果表明,该控制器的助力曲线接近日本N4样机,能取得比较满意的助力效果.     

基于nRF24LE1的智能双向汽车遥控系统

基于射频系统芯片nRF24LE1,设计了一种具有双向通信功能的汽车遥控器和车锁控制系统,重点研究了系统的结构和软、硬件设计。遥控器不仅可以发送控制信息,还可以接收车锁的反馈信息,比目前普遍使用的单向遥控器功能强大。同时在车锁部分,增加了GSM模块,实现GSM网络与遥控器的双重控制,更能确保汽车的安全。     

基于ATmega16L的PID温控系统设计

详细介绍了基于ATmega16L为核心的温度控制系统设计,传感器用Pt100并以PID算法进行温控,上位机PC与ATmega16L单片机之间通过串口通信。可对工作现场实时监控、温度曲线显示。参数设定后下位机可独立进行相应的PID控制运算控制PWM,来控制调节温度。应用于样品烘制的温度控制,具有成本低精度高、易于维护的特点。     

基于PIC单片机的DNS客户端的研究与实现

主要论述了以PIC单片机为载体的DNS客户端的软件设计、系统编程等内容。DNS客户端是采用Microchip公司的PIC24FJ256GA106单片机作为处理器来控制并实现的,软件方面采用的是MPLAB IDE,可以用来为Microchip单片机开发应用程序,也可以提供单一的集成环境来为嵌入式单片机开发程序代码。经过试验调试证明,该DNS客户端可以实现域名与IP地址的解析,且稳定可靠,对用户透明,操作简单。     

基于MSP430单片机的无线表决系统设计

介绍了一种基于MSP430F123和nRF905的无线表决系统的软硬件设计与实现.系统通过主控器、表决器和PC机实现对表决信息的采集、处理和显示.本系统具有低功耗、功能强、可靠性高和使用方便的优点,在各种机关和企事业单位中有很高的推广和应用价值.