发酵乳杆菌HCS08-005耐逆性及对体外细胞免疫调节作用的研究

目的 研究发酵乳杆菌(Lactobacillus fermentum) HCS08-005耐逆性及对体外细胞的免疫调节作用。方法 考察发酵乳杆菌HCS08-005的耐酸耐胆盐能力，并应用发酵乳杆菌HCS08-005细胞裂解物，处理小鼠单核巨噬细胞RAW264.7和小鼠脾脏细胞，用酶联免疫吸附测定试剂盒检测各类炎症因子包括肿瘤坏死因子-α (tumor necrosis factor-α，TNF-α)、白细胞介素-2 (inter-leukin-2，IL-2)、白细胞介素-12 (inter-leukin-12，IL-12)、γ干扰素(interferon-γ，IFN-γ)的表达水平。结果 显示发酵乳杆菌HCS08-005有较好的耐逆性，能够耐受酸和胆盐环境到达肠道发挥作用。不同浓度的发酵乳杆菌HCS08-005细胞裂解物对小鼠脾脏细胞和巨噬细胞分泌炎症因子均有极显著影响(P<0.01)，在质量浓度为100 μg/g时，IL-2分泌量为421.49 pg/g，TNF-α分泌量为161.23 pg/g，IFN-γ分泌量为846.14 pg/g，IL-12分泌量为12.88 pg/g，因子水平极显著提高(P<0.01)。结论 在体外细胞试验中，发酵乳杆菌HCS08-005有较好的耐逆性，对体外细胞有免疫调节作用。     

A downlink beamforming assisted by locally positioned communication devices

Recently, multiple cell types with overlapping coverage have been deployed simultaneously to increase cellular network capacity. Cross‐tier interference is one of the key technical challenges in the use of this method. A simple and practical beamforming scheme assisted by locally positioned communication devices for the downlink of a multi‐cell wireless hierarchical cell structure system is proposed in this paper to maximize the capacity of the embedded small cell and simultaneously ensure minimal impact on the performance of existing macrocells. The locally positioned communication devices can be implemented with low complexity and at low cost and can continuously provide helpful and accurate information to base stations for the proper configuration of geographical cell coverage, allowing neighboring cells to cooperate effectively with each other. Simulation results verify that the proposed scheme can provide a significant gain over conventional systems not using the proposed algorithm. Copyright © 2013 John Wiley & Sons, Ltd.     

基于视觉的智能车模糊PID控制算法

基于freescale公司的16位HCS12单片机设计一种智能车系统。系统摄像头采集路径信息，通过单片机的模糊推理机在线整定PID参数，使小车能按照任意给定的黑色引导线平稳地寻迹。实验证明：系统能很好地满足智能车对路径识别性能和抗干扰能力的要求，舵机调节响应时间快，稳态误差小，具有较好的动态性能和良好的鲁棒性。     

基于KEELOQ技术的遥控门禁系统的实现

基于KEELOQ技术的解码运算,采用滚动码技术,通过HCS301进行跳码编码并对其进行解码,同时采用芯片PIC16F630,设计了一个遥控门禁系统。给出了系统流程图和部分硬件原理图,详细描述了密钥的产生和解码的过程。本系统具有保密性高、使用方便、成本低的特点。     

CAN控制器驱动程序开发

开发了通用MSCAN模块驱动程序，阐述了驱动程序文件组成、主要数据结构和功能函数，并给出了主要函数程序流程图。     

一种引入停止机制的改进爬山算法

针对爬山法(hill-climbing searching,HCS)在最大功率点(maximum power point,MPP)处存在的转速振荡和风速变化导致搜索方向误判的问题,提出1种具有扰动停止机制的改进爬山算法。该算法不仅继承了变步长爬山法快速搜索至MPP附近的优点,还具有MPP检测和停止机制。在风机跟踪至MPP附近时,该机制不仅可以有效降低转速振荡对风机系统机械部件的磨损,而且克服了算法停止机制生效后风速再次变化时对搜索方向判断的干扰,从而进一步提高了风能捕获效率。在简化风电系统模型的基础上,仿真结果验证了该算法的有效性和优越性。     

基于红外传感器的智能车系统设计

以飞思卡尔半导体公司的MC9S12DG128B系列MCU为核心,设计智能车的系统框架,软件和硬件的设计方案。详细介绍了电源模块和电机驱动模块在设计过程中遇到的问题和解决方案。     

Enhanced radial fuzzy wavelet neural network with sliding mode control for a switched reluctance wind turbine distributed generation system

In this article, an Enhanced Radial Fuzzy Wavelet Neural Network with Sliding Mode (RFWNNSM) and hill-climb searching (HCS) maximum power point tracking (MPPT) strategy are proposed for a switched reluctance generator (SRG) in a variable-speed wind energy conversion system (WECS). The implemented MPPT control is an HCS algorithm that does not require the knowledge of turbine or generator characteristics. However, this study proposes a simple optimal DC-Link voltage search type HCS control, and therefore a faster convergence to MPPT is achieved. A high-performance online training Enhanced Radial Fuzzy Wavelet Neural Network (RFWNN) using a back-propagation learning algorithm with a sliding mode regulating controller is designed for an SRG. The MPPT strategy locates the system operation points along the maximum power curves based on the DC-Link voltage of the inverter, thus avoiding the need to detect the generator speed.     

HCS12X单片机的SD卡FAT文件系统读写设计

基于HCS12X单片机SPI模块读取Micro SD卡与SD卡,并解析SD卡上FAT文件系统以实现文件的读取与写入。测试证明,系统对FAT文件系统的读取稳定,误差小,速度较快。使用HCS12X类单片机对SD卡进行读取,在汽车智能设计和单片机调试方面有较高的应用价值。     

HCS08 MCU背景调试技术的研究与底层设计

介绍了Freescale的MC9S08系列MCU的背景调试技术,分析了背景调试技术的实现方法,并阐述了相关的要点。