计算机存储系统的9位字节单向错误检测码

本文介绍了一种计算机存储系统中的单向错误检测码，系统构成采用９位字节，其中８位数据位，１位校验位，并使用一个单独的附加奇偶校验字节。单向错误检测码有两类，一类每个字包含固定的奇偶校验位；另一类每个字节包含的检验位的构成方式是任意的。     

超长距、超大容量DWDM系统解决方案探讨

对上海贝尔阿尔卡特推出的超长距离、超大容量DWDM系统解决方案——1626LM系统设备的特点，从技术方面和系统角度作了较详细的分析。     

数字电视简介

对数字电视信号的取样、量化、编码、信源的编码、信道的编码以及信号的传输的整个过程作了较简单阐述。     

A flow cytometric assay technology based on quantum dots-encoded beads

A flow cytometric detecting technology based on quantum dots (QDs)-encoded beads has been described. Using this technology, several QDs-encoded beads with different code were identified effectively, and the target molecule (DNA sequence) in solution was also detected accurately by coupling to its complementary sequence probed on QDs-encoded beads through DNA hybridization assay. The resolution of this technology for encoded beads is resulted from two longer wavelength fluorescence identification signals (yellow and red fluorescent signals of QDs), and the third shorter wavelength fluorescence signal (green reporting signal of fluorescein isothiocyanate (FITC)) for the determination of reaction between probe and target. In experiment, because of QDs’ unique optical character, only one excitation light source was needed to excite the QDs and probe dye FITC synchronously comparing with other flow cytometric assay technology. The results show that this technology has present excellent repeatability and good accuracy. It will become a promising multiple assay platform in various application fields after further improvement.     

一种高可靠性数据采集系统的设计与实现

本文介绍了一种以电力线载波信道的多路监控楼宇报警系统,系统以89C51为核心,具有安装简单、功能较强、成本低、实用等特点。     

Characterizing the transmission of acupuncture signal: A combination of experimental and computational study

In order to reveal the underlying mechanisms about the conduction of acupuncture signal, manual acupuncture (MA) manipulations with different frequencies are taken at ‘Zusanli’ points of experimental rats. The induced electrical signal in spinal dorsal root ganglion is detected and recorded. It is found that rate coding features of acupuncture with different frequencies are different in PSTHs after spike sorting. Neuronal adaption and saturation phenomena are also observed. To elucidate the underlying mechanisms, we develop a delayed feedforward network model with plasticity for acupuncture signal transmission path. It is shown that this model could account for some important experimental phenomena and make further testable predictions. The underlying mechanisms of acupuncture are better understood by combining the experiment and simulation results.     

Encode–decode network with fully connected CRF for dynamic objects detection and static maps reconstruction

The key of robots operating autonomously in dynamic environments is understanding the dynamic characteristics of objects. This paper aims to detect dynamic objects and reconstruct 3D static maps from consecutive scans of scenes. Our work starts from an encode–decode network, which receives two range maps provided by a Velodyne HDL-64 laser scanner and outputs dynamic probability of each point. Since the soft segmentation produced by the network tends to be smooth, a 3D fully connected CRF (Conditional Random Field) is proposed to improve the segmentation performance. Experiments on both the public datasets and real-word platform demonstrate the effectiveness of our method.     

嵌入式平台下的安全媒体传输系统

Security video communication is a challenging task, especially for wireless video applications. An efficient security multimedia system on embedded platform is designed. By analyzing the hardware architecture and resource, the efficient DSP-based H.264/AVC coding is studied by efficient video coding techniques and system optimizing implementation.To protect the confidentiality and integrity of media information, a novel security mechanism is presented, which includes user identify authentication and a perceptual video encryption algorithm based on exploiting the special feature of entropy coding in H.264. Experimental results show that the proposed hardware framework has high performance and achieves a better balance between security and efficiency. The proposed security mechanism can achieve high security and low complexity cost, and has a little effect on the compression ratio and transmission bandwidth. What’s more, encoding and encryption at the same time, the performance of data process can meet real-time application.