基于DSP的异步串行通讯系统设计

利用DSP器件-TMS320C5416以及异步串行通讯器件-ST16C654实现了系统间多路数据的异步串行通讯,为系统中存在的各个分系统提供信息传输纽带.TMS320C5416的高速运算速度以及庞大的数据吞吐量为系统提供稳定的运算平台,ST16C554为系统扩展多路异步串行通讯端口,外部FLASH器件为系统程序提供存储空间,而电平转换芯片以及电源转换芯片则为系统提供外部接口需要的电平格式以及芯片工作所需要的各种电源幅值.     

控制局域网(CAN)中的数据转换的设计与实现

给出了一种实现CAN总线与RS232之间数据的转换的方法及过程．主控单元为单片机P89C51，其中涉及到CAN芯片SJA1000以及串口扩展芯片ST16C654的应用。作者分别以设计原理、硬件设计及软件设计三部分来介绍．并着重介绍了软件部分的功能实现过程，其中CAN接口部分按照CAN的2．0B协议来执行。     

G.654.E光纤承载超100Gbit/s OTN系统应用分析

针对G.654.E光纤即将商用于超100 Gbit/s OTN系统而无相应规范标准的问题,本文首先利用香农定理和光信噪比公式理论分析传输速率的受制因素,接着分析OTN系统的最大光放段损耗值中的中继段损耗、活接头损耗和色散补偿光纤插损,然后推算出G.654.E光纤承载超100 Gbit/s OTN系统中不同传输速率下的复用段距离,并与实际测试值进行对比分析,最后结合骨干网络现状情况,提出G.654.E光纤承载超100 Gbit/s OTN技术应用建议。     

Comprehensive Analysis of hsa-miR-654-5p’s Tumor-Suppressing Functions

The pivotal roles of miRNAs in carcinogenesis, metastasis, and prognosis have been demonstrated recently in various cancers. This study intended to investigate the specific roles of hsa-miR-654-5p in lung cancer, which is, in general, rarely discussed. A series of closed-loop bioinformatic functional analyses were integrated with in vitro experimental validation to explore the overall biological functions and pan-cancer regulation pattern of miR-654-5p. We found that miR-654-5p abundance was significantly elevated in LUAD tissues and correlated with patients’ survival. A total of 275 potential targets of miR-654-5p were then identified and the miR-654-5p-RNF8 regulation axis was validated in vitro as a proof of concept. Furthermore, we revealed the tumor-suppressing roles of miR-654-5p and demonstrated that miR-654-5p inhibited the lung cancer cell epithelial-mesenchymal transition (EMT) process, cell proliferation, and migration using target-based, abundance-based, and ssGSEA-based bioinformatic methods and in vitro validation. Following the construction of a protein–protein interaction network, 11 highly interconnected hub genes were identified and a five-genes risk scoring model was developed to assess their potential prognostic ability. Our study does not only provide a basic miRNA-mRNA-phenotypes reference map for understanding the function of miR-654-5p in different cancers but also reveals the tumor-suppressing roles and prognostic values of miR-654-5p.     

G.654光纤连接熔纤损耗分析

针对G.654光纤连接熔纤损耗值无数据参考的问题,首先分析了G.654光纤连接熔纤测试损耗值,然后与G.654光纤连接熔纤损耗的理论分析数据进行对比,同时结合光纤熔接机型号,最后给出G.654光纤连接自身熔纤损耗值和G.652光纤与G.654光纤连接混接熔纤损耗值。     

基于TMS320LF2407A的可燃性气体浓度检测系统的设计

中介绍了一种用于可燃性气体浓度检测系统的设计．它采用TCS813为可燃性气体传感器来检测气体的浓度、以AD654为电压与频率转换元件，以DSP(TMS320LF2407A)为徽处理器，对相关的硬件设计、参数设置和软件流程的编写进行了介绍。     

TMP01温度控制器及其应用

介绍TMP01可编程温度控制器的工作原理及控制点的设置方法，分析了TMP01在温控和传输中的典型应用电路。     

基于新型光纤的长距高速传输系统部署实践

为满足光传送网(OTN)系统截面容量大幅提升的需求,探索具有代表性的技术演进方向,中国移动在现网环境下基于G.654E新型光纤部署了长距离超100 Gbit/s干线OTN系统,集中应用一批OTN应用领域的前沿新技术,组织测试,得到了新型光纤的承载性能优势、实用传输距离、多种波道类型并存、能效和在线测量功能等实测结果,对关键新技术的应用价值评估和具体引入策略建议可作为下一阶段系统部署的参考。     

Precipitated phases of superaustenitic stainless steel 654SMO

The phase diagram of superaustenitic stainless steel 654SMO was calculated by thermodynamic software and the precipitated phases in the specimens aged at 800-1100°C for 1hwere studied by methods of physicochemical phase analysis,scanning electron microscopy and transmission electron microscopy.The results showed that the size of precipitated particles increased with increasing the temperature.The amount of second phases reached the maximum value at 900°C,but decreased above 900°C.There were about eight kinds of precipitated phases in 654SMO includingσphase,Cr_2N,μphase,χphase,Laves phase,M_(23)C_6,M_6C and M_3C,in which theσphase and Cr_2N were the dominant precipitated phases.     

Ad654在温度巡检系统中的应用

AD654是一种V/F变换器,使用该芯片实现对铂热电阻传感器信号的模数转换,完成对温度信号的采集,具有电路简单、精度高、抗干扰能力强,同单片机接口简单等一系列优点。