可见分光光度检测离子色谱仪分析铬鞣液中铬含量

本文介绍了用可见分光光度检测离子色谱仪分析铬鞣液中铬含量,允其适用于大量样品的连续分析。实验证明,该方法精密度高,变异系数0.32%,线性关系好,回收率为98～100.25%,准确,快速,方便是该方法的特点。     

Organic Solid Solutions: Formation and Applications in Organic Light‐Emitting Diodes

To enhance the performance of organic devices, doping and graded mixed‐layer structures, formed by co‐evaporation methods, have been extensively adopted in the formation of organic thin films. Among the criteria for selecting materials systems, much attention has been paid to the materials' energy‐band structure and carrier‐transport behavior. As a result, some other important characteristics may have been overlooked, such as material compatibility or solubility. In this paper, we propose a new doping method utilizing fused organic solid solutions (FOSSs) which are prepared via high‐pressure and high‐temperature processing. By preparing fused solid solutions of organic compounds, the stable materials systems can be selected for device fabrication. Furthermore, by using these FOSSs, doping concentration and uniformity can be precisely controlled using only one thermal source. As an example of application in organic thin films, high‐performance organic light‐emitting diodes with both single‐color and white‐light emission have been prepared using this new method. Compared to the traditional co‐evaporation method, a FOSS provides us with a more convenient way to optimize the doping system and fabricate relatively complicated organic devices.     

一种基于ARM的救援探测机器人的设计

本文主要介绍了一种基于ARM内核的S3C44B0救援探测机器人的设计,该机器人由将实时性较高的操作系统Linux移植到S3C44B0的控制系统、多传感器系统、运行与避障电路系统、图像采集处理系统、无线数据收发系统组成.在Linux开发环境下编写应用程序,实现能远程控制救援探测机器人行走与自动避障、温度和湿度以及O2、H2S、C2H4O等几十种可燃和有毒气体含量的检测、现场图像的采集、无线传输与控制的功能,其特点是能够远程无线控制机器人和远程采集信息.     

基于Wi-Fi即时定位与映射像素模板匹配的室内运动地图构建与定位

传统指纹定位方法由于建库人力时间开销大、系统通用性不强约束着指纹定位系统的推广,为了解决该问题同时结合即时定位与映射(SLAM)技术的优势,该文提出一种新的Wi-Fi/微机电系统(MEMS)融合室内运动地图构建与定位方法。首先利用行人航迹推算(PDR)、最小描述长度(MDL)原则和基于密度的空间聚类算法(DBSCAN)对众包运动轨迹进行预处理,提出基于轨迹主路径的运动地图构建方法。之后提出基于像素模板的地图匹配方法获取地图的绝对位置,并采用抗差扩展卡尔曼滤波(EKF)对目标位置进行最优估计。实验结果表明,所提聚类方法可以准确构建各区域运动地图,在少量的人力时间开销下实现较高的定位精度。     

基于嵌入式系统的激光扫描检测系统

为了提高回转体零件的加工和检测精度,将光电检测技术与电子计算机技术相结合,设计并研制了一种基于嵌入式系统的激光扫描检测系统,给出了设计原理和软硬件设计方法,并利用该系统对轴径不同的六组标准工件进行测量.实验表明,该系统的平均测量误差为0.00283mm,满足设计指标要求的3μm,能够极大提高回转体零件的尺寸测量精度,具有较好的应用价值.     

An optimal scheduling and routing under adaptive spectrum-matching framework for MIMO systems

Multi-users (MUs) along the communication links cause noise and traffic in the channel. The prediction of availability and the optimal usage of channels are the main objectives of the multi-input multi-output (MIMO) system. Several optimisation algorithms select the optimal channel for the users effectively. But the high-error rate and the probability values are the two major problems in traditionally optimised channel selection methods. The bandwidth allotted for information transmission is minimum. Moreover, the outage probability values are maximum in traditional scheduling algorithms. This paper proposes the new optimisation algorithm that predicts the channels for transmission and adaptive spectrum matching concept to predict the suitable channel from allocated bands. Also, the prioritisation on high-spectrum intensity basis assures an efficient data delivery to the receiver. The scheduling of available channels and data prioritisation minimises the error probability rates. This paper investigates the effectiveness of proposed optimal channel utilisation against the different modulation schemes such as three-dimensional complementary codes, linear network coding with the quadrature phase shift keying in terms of the average block error probability and bit error rate.     

多目标宏形状特征点集快速检测技术研究

提出一种新的图像多目标特征点集检测技术。该技术研究了多目标分割、目标细微形状提取和宏形状提取,进而检测表示目标宏形状特征的特征点集。各目标宏形状特征点集进行识别与跟踪．研究了上述技术的快速实现。实际DSP跟踪系统处理结果表明该技术计算量小,抗噪能力强且准确性高,能准确识别目标,适用于实际图像目标特征点集的检测。     

基于时空搜索的红外微弱点状动目标检测技术

在背景杂波被抑制后的图像序列中,残留样本为相互独立、服从高斯分布的条件下,首先论述了理想三维时空搜索检测算法,并对其性能进行分析。结果表明,虽然它具有最佳的检测性能,但是由于需要事先知道关于噪声及目标先验知识的缘故,无法进行实际应用。对此．研究了直接利用观测样本来估计噪声及目标的一、二阶矩,从而无须事先知道噪声统计特性的三维时空搜索检测算法及其详细步骤,推导了二元判决统计量所服从的概率分布函数（结果为t分布）,对比分析了算法的检测性能,并给出了理想算法和本算法中共存的问题及其相应的改进方案。此种算法在连续多帧做任意运动的流星、人造卫星以及其他运动目标的光学检测与跟踪中应用广泛。     

A pilot-assisted non-Cyclic Prefixed MIMO-SCFDE system

A non-Cyclic Prefixed Multiple-Input Multiple-Output Single-Carrier Frequency-Domain Equalization (non-CP MIMO-SCFDE) system based on a recursive algorithm of Joint Channel Es- timation and Data Detection (recursive-JCEDD) is proposed in this paper. Unlike the traditional CP MIMO-SCFDE system, the transmitted block of the proposed system is designed in the way that block-type pilot sequences and Single-Carrier (SC) information sequences have been arranged alter- nately without any cyclic prefix before each ...     

复眼式UV-LED面光源的曝光机平行光系统

印制电路板生产设备紫外线曝光机的光源系统,其能耗大、使用维护成本高、含汞等缺陷,在倡导节能环保的当今,业界一直致力于改进。UV-LED面光源作为新一代绿色环保紫外线光源,为印制电路板曝光领域带来革命性的变化。文章通过分析传统平行光紫外曝光机光学系统特点,设计了一种平行光紫外线曝光机适用的UV-LED面光源系统,UV-LED灯珠光功率利用率大幅提高,光照均匀性优良,并且不改变曝光机结构的情况下,可直接安装使用。实验表明,采用了复眼式阵列光学透镜结构设计的UV-LED面光源系统,完全可替代传统平行光紫外曝光机光源。