拟青霉β-1,3(4)-葡聚糖酶同源模建、分子对接与分子动力学模拟

在同源模建得基础上,采用分子对接和分子动力学(MD)模拟方法研究了拟青霉β-1,3(4)-葡聚糖酶与β-1,3(4)-葡聚糖(G4G4G3G4G4G)和β-1,3-葡聚糖(G3G3G3G3G3G)的相互作用机制。对接结果显示,该酶对β-1,3(4)-葡聚糖具有较β-1,3-葡聚糖更高的结合力,动力学轨迹分析显示,葡聚糖酶催化β-1,3(4)-葡聚糖的机制要比催化β-1,3-葡聚糖更为复杂。     

基于多方向复支持度变换的多聚焦图像融合

针对支持度变换应用于多聚焦图像融合存在的不足,提出复方向滤波器组与支持度变换相结合的图像融合方法.采用支持度变换对图像进行多尺度分解以提取高频和低频分量,运用复方向滤波器组对各级高频分量进行分解,提取各方向图像信息,对源图像各对应频带的分解信息按照规则融合,并重构得到融合图像.实验结果表明,该方法不仅可取得较好的主观融合效果,而且客观融合指标也优于支持度变换方法.     

基于ARM7的磁浮列车空压系统CAN通信研究

针对磁浮列车空压系统的特点,将ARM7作为CAN总线的控制器,研究了一种基于CAN总线的网络监控通信.在理论上对各节点的应用进行了分析,选择了相应的硬件并对对象字典进行了优化配置.最后通过对各节点参数的配置并利用软件对boot-up过程进行仿真,证明了方案的实用性.     

无创胃液隐血检测传感器的设计

基于胶囊内窥镜与隐血检测原理,提出了一种能够智能识别胃液隐血(GOB)信息的智能电子胶囊,设计了基于胶体金免疫原理的胃液隐血检测传感器,该传感器主要包括隐血检测模块与隐血识别模块,隐血检测模块特异性针对人体血红蛋白.在离体状态下对传感器样机进行了原理性实验.结果表明:该胃液隐血检测传感器能够较好地识别血红蛋白浓度为6-1 800 mg/L的胃液隐血.整个系统结构设计简单、可靠,为早期胃癌的普查初筛提供了一个新的思路.     

基于霍尔传感器微阵列的呼吸频率检测系统设计

基于呼吸感应体积描记技术原理,在一条腹带内部嵌入了永磁铁,腹带系在患者腰部,在呼吸过程中,由于体积的变化引起腹带中永磁铁的位置运动,通过霍尔传感器阵列对永磁铁位置进行检测,从而判断呼气和吸气的过程,采用单片机对传感器信号进行分析处理,计算出呼吸频率。经10名受试者重复实验,并与呼吸检测设备的检测结果进行比较,本系统的平均精确度高于95%,证明了本系统的可靠性。所设计的呼吸频率检测系统可用于睡眠呼吸检测仪、慢呼吸高血压治疗仪等设备。     

Study on optimization‐based layered classification for separation of wetlands

The classification and dynamics monitoring of wetlands using remotely sensed data is a complicated, time‐consuming process involving high costs, and the accuracy varies depending on the techniques used for image processing and analysis, and the time and costs required for training, etc. This paper presents an optimization‐based layered classification method for the classification and dynamics monitoring of wetlands based on a decision procedure of multiple objectives. Four driven factors including techniques to be used, classification accuracy, and the time and cost needed for the classification, were selected as the indicators of criteria in optimization of the layered classification. This method was applied to Thematic Mapper (TM) image classification of the wetlands in Minjiang River estuary and led to the overall correct percentage of 85.13% for seven categories of the wetlands.     

Global decentralised stabilisation for a class of uncertain large-scale feedforward nonlinear systems

In this paper, the problem of global decentralised stabilisation for a class of uncertain large-scale feedforward nonlinear systems is investigated. The system under consideration is allowed to contain unknown non-Lipschitz continuous nonlinear terms. The design of the global decentralised controllers takes a two steps procedure. First of all, based on the adding a power integrator technique and the homogeneous domination approach a local homogeneous decentralised controller is proposed for each subsystem of the large-scale feedforward nonlinear system. Then, we integrate a series of nested saturation functions with the homogeneous decentralised controllers and adjust the saturation levels to ensure globally asymptotic stability of the closed-loop system. Simulation studies are conducted to illustrate the effectiveness of the proposed control method.     

网线吸收和端口占用分析驱动的FPGA装箱算法

为了减少电路连线寻路距离,提高FPGA装箱算法布通率,根据网线相连节点的分布情况分析了装箱操作对网线吸收和端口占用的影响,构造了布通率驱动吸引函数;并通过对关键路径的吸收来满足路径时延要求,利用爬山法提高资源利用率,提出一种FPGA装箱算法.实验结果验证了该算法的有效性.     

细号高密涤棉横条织物的生产实践

探讨细号高密涤棉横条织物的生产技术要点.通过分析细号高密涤棉横条织物的风格、特点以及生产过程中出现的问题,整经采用“中车速、中张力、小伸长”的工艺原则,浆纱采用“两高一低”的工艺配置,织造采用“早开口、晚引纬、合理配置经位置线”的工艺原则,较好地解决了经缩和纬停问题.织机综合效率达到90％以上,下机一等品率达到93％以上.