Spectroscopic characterisation of a cross-flow plasma jet

The aim of this work is to study the thermal characteristics and electron density based on atomic and molecular emission of a new plasma jet at atmospheric pressure. The novelty of our jet is its generation with a single electrode, the plasma gas flowing perpendicularly to the RF powered electrode (13.56 MHz, 10³ V). Optical emission of the plasma was collected in two ways: the normal viewing mode and the axial viewing mode. The plasma characteristic parameters as function of helium flow-rate, plasma power and position of the investigated zone were studied. The excitation, vibrational and rotational temperatures are in the range of 1500-2350 K, 3500-4400 K and 450-1100 K, respectively. The electron number densities are in the range of 10¹³-10¹⁴ cm⁻³. For qualitative observations regarding the atomic and molecular processes in the plasma we used the relative intensities of the most representative lines of He, N₂, O, H and .     

Pi—Sigma模糊神经网络及其在态势评估中的应用

应用模糊理论和神经网络理论构造基于高木－关野模糊系统的Ｐｉ－Ｓｉｇｍａ模糊神经网络,根据模糊决策表选用不同的网络计算目标的威胁度,选用了几种典型样本的参数集中了专家的经验,对样本进行训练,效果良好。     

覆盆子发酵酒发酵工艺响应面优化研究

以覆盆子干果为原料,通过响应面设计对覆盆子发酵酒的发酵工艺条件（温度、酵母菌接种量、蔗糖添加量）进行优化。研究结果表明,优化后的覆盆子发酵酒工艺条件为：覆盆子干果经粉碎至60目,料水比（1∶40）,发酵温度为25.3℃,接种量0.72%,蔗糖添加量20.53%,此条件下,乙醇浓度为13.19%vol,总黄酮含量2.58 mg/mL。得到的覆盆子发酵酒澄清透明,色泽金黄,爽口协调,口味纯正,理化卫生指标均符合果酒要求。     

基于Raspberry Pi的智能灭蚊飞行机器人

设计了一种基于Raspberry Pi的智能灭蚊虫飞行机器人,其能够携带灭蚊虫药水喷洒地面和沟渠区域,实现自动高效灭蚊虫的功能.主要介绍飞行机器人的设计及开发,包括飞行控制器设计、Raspberry Pi通信系统设计、Android控制端设计、电机驱动设计、喷药系统设计等.本系统设计及实现可以移植到其他农林药物喷洒作业中,具有一定的创新意义.     

k-选择网和Pi演算的表达能力

文中定义了Petri网的一子类系列:k-选择网,它形成一个后类包含前类的Petri网子类的无穷序列,证明了此无穷序列的并集等于Petri网类,自由选择网是k=1的k-选择网,即1-选择网.在证明自由选择网系统可以用Pi演算表达的基础上,文中进一步证明了所有2-选择网系统可以用Pi演算表达.     

用于输电线路监测设备的一种电场感应取能电源

文中提出了一种电场感应取能电源,可为输电线路监测设备供电。电源部分由电力杆塔顶端安装的金属感应极板和充电电路组成,针对极板的设计,文中利用Ansoft Maxwell软件建立塔架的模型进行仿真并计算相应的感应电流值,同时通过地面搭建的塔架模拟装置的实验和仿真验证极板的设计,结果表明模拟装置的感应电流仿真结果和实验值一致,从而表明电场感应取能技术的可行性及极板设计的正确性,充电电路基于电感续流模式的脉冲放电法进行设计。最后设计一套视频监测设备对该电源进行检测,结果表明该电源为监测设备提供足够电能完成线路状态监测的任务。     

Software for calculation of electric power systems parameters

The calculation of power transmission lines parameters of electric energy has a fundamental importance in the design, construction and simulation of electric power systems. Generally, the results obtained are used in the database for the studies of power flow, short circuit and stability.This paper presents a software with graphical interface which allows the estimation of parameters of power transmission lines of electric energy. By means of a tutorial, the user is oriented step by step about the input of data and other features of the line, passing to the calculation stage when the data are correctly and completely entered. The output of the results is shown on the screen on a Pi circuit and through graphics that simulate the voltage drop for a determined load.     

Application of Internet of Things Micropower Smart Switch in Temperature Monitoring

This study uses the smart phone with the Android system to construct a cloud-side smart switch system in the client-server architecture with the Android open platform system, using microprocessors (MCU 16F690) as the thermostat controller and combined with Raspberry Pi. The computing technology extends the control of the constant temperature from the local to the cloud, allowing the user to view the temperature status recorded by the cloud server using the smart phone application (App) or web browser. It can even remotely control the heating power of the smart switch for the heating device in the Internet control environment and use the proportional-integral-derivative (PID) control and the pulse-width modulation (PWM) technology to achieve intelligent constant temperature control. The proposed control system uses the expert PID control as the core to calculate the duty cycle of the PWM signal to control the power output of the smart switch for the constant temperature water tank. The experiment results verify the effectiveness of the proposed system.     

A lightweight portable intrusion detection communication system for auditing applications

The goal of this paper is to develop, deploy, test, and evaluatea a lightweight portable intrusion detection system (LPIDS) over wireless networks by adopting two different string matching algorithms: Aho‐Corasick algorithm and Knuth‐Morris‐Pratt algorithm (KMP). Thus, this research contributes in three ways. First, an efficient and lightweight IDS (LPIDS) is proposed. Second, the LPIDS was developed, implemented, tested, and evaluated using Aho‐Corasick and KMP on two different hardware platforms: Wi‐Fi Pineapple and Raspberry Pi. Third, a comparative analysis of proposed LPIDS is done in terms of network metrics such as throughput, power consumption, and response time with regard to their counterparts. Additionally, the proposed LPIDS is suggested for consultants while performing security audits. The experimental results reveal that Aho‐Corasick performs better than KMP throughout the majority of the process, but KMP is typically faster in the beginning with fewer rules. Similarly, Raspberry Pi shows remarkably higher performance than Wi‐Fi Pineapple in all of the measurements. Moreover, we compared the throughput between LPIDS and Snort, it is observed and analyzed that former has significantly higher throughput than later when most of the rules do not include content parameters. This paper concludes that due to computational complexity and slow hardware processing capabilities of Wi‐Fi Pineapple, it could not become suitable IDS in the presence of different pattern matching strategies. Finally, we propose modification of Snort to increase the throughput of the system.     

基于树莓派的人脸识别考勤系统的开发与实现

提出一种基于树莓派的人脸识别考勤系统,该系统通过使用人脸识别云服务可实时地对人员进行考勤.文中详细描述了该系统的搭建和实现过程,为相关产品提供了一套很好的解决方案.对所设计的系统进行模拟测试,其测试结果达到了设计目标.