整机柜定制化服务器应用实践研究

整机柜定制化服务器在机柜层面统一了服务器的硬件设计方案,具有更高的集成度和更低的平均能耗。因此,介绍整机柜定制化服务器的发展应用现状,通过某资源池工程的安装部署情况,分析整机柜定制化服务器相对于传统服务器的优点及部署应用时存在的问题,最后结合工程实践提出了后续部署优化建议。     

一种基于图像的无损隐秘传输方法

提出了一种新的基于预测编码的图像无损隐秘传输方法.该方法用线性预测误差扩展和嵌入/提取算法,在图像无损编码压缩过程中嵌入大数据量的秘密信息,提取秘密信息后,原宿主图像信息能无损恢复.该方法已在局域网上进行了实验,结果表明,与以往的无损嵌入算法相比,其提高了秘密信息的可嵌入容量,且对隐藏信息后的图像质量影响较小.     

运营商网络云化架构演进分析

针对运营商现有烟囱式、封闭式、资源独占式网络无法适应互联网应用的需求,提出一套开放的、解耦的、资源共享的新网络架构,并给出向该网络架构演进的实施规划。该架构以SDN(软件定义网络)/NFV(网络功能虚拟化)为技术抓手,以网元云化部署、软件定义网络、新一代运营支撑系统、网络DC(数据中心)化改造为切入点,推进网络云化演进,降低网络成本,提升运营商自身竞争力。     

特种加工线切割机床智能渐进式走丝控制方案及控制器硬件电路设计

针对特种加工设备中走丝线切割机床升级改造需求大,成本高的问题,提出了一种低成本的设备改造方案。在不增加硬件投资的前提下,提出了精粗加工渐进使用电极丝的改造方案,并设计出智能渐进走丝控制器的硬件电路原理图和PCB板。通过与相关厂家的合作改造表明,该智能渐进走丝控制方案和硬件电路能够最大限度的降低改造成本,并能提升机床的加工精度、表面光洁度和加工的一致性。     

人工智能技术研发实践与产品规划战略思考

人工智能技术在各个行业的应用均体现出爆发趋势,但是AI技术的性能局限同时约束着相关产品的应用场景。在感知方面,识别算法的准确率无法达到100%,召回率更低;在认知方面,知识难以100%覆盖业务场景,因此如何开展商业化应用就需要精心规划。本文首先介绍几项AI产品研发应用,并总结相关的经验和问题。在此基础上,按照面向任务关键应用(MCA)和非任务关键应用(NMCA)2个维度,针对4个应用类型(决策支持与增强、智能代理、决策自动化、智慧产品),围绕3类商业价值和2类应用假设,分析AI类应用产品的战略规划决策要素,为AI应用领域决策者提供帮助。     

Linear Size Optimal $q$-ary Constant-Weight Codes and Constant-Composition Codes

An optimal constant-composition or constant-weight code of weight w has linear size if and only if its distance d is at least 2w-1. When d ? 2w, the determination of the exact size of such a constant-composition or constant-weight code is trivial, but the case of d=2w-1 has been solved previously only for binary and ternary constant-composition and constant-weight codes, and for some sporadic instances. This paper provides a construction for quasicyclic optimal constant-composition and constant-weight codes of weight w and distance 2w-1 based on a new generalization of difference triangle sets. As a result, the sizes of optimal constant-composition codes and optimal constant-weight codes of weight w and distance 2w-1 are determined for all such codes of sufficiently large lengths. This solves an open problem of Etzion. The sizes of optimal constant-composition codes of weight w and distance 2w-1 are also determined for all w ? 6, except in two cases.     

浅析内联网安全问题与管理

在现今社会环境下,各个单位的业务系统对网络系统的依赖性不断增加,人们在享受网络技术带来的便捷、高效时,也面临着网络安全方面的巨大风险。而作为业务主要承载体的内联网,也成为安全问题高发的区域,内联网的安全问题也成为整个信息系统安全的首要考虑方面。文中从几方面研究内联网安全与防范措施:其一是保密性,即保证非授权操作不能获取受保护的信息或计算机资源;其二是完整性,即保证非授权操作不能修改数据;其三是有效性,即保证非授权操作不能破坏信息或计算机资源。     

ZigBee技术在煤矿安全领域的应用研究

安全管理已经成为煤矿生产中的重要一环.在煤矿井下发生安全事故后,及时准确地获知井下作业人员的位置信息是至关重要的.本文在对ZigBee技术的研究基础上,提出了一种煤矿管理服务系统的构建设计,具有矿井人员定位,考勤管理,环境信息采集等功能.     

基于BOTDA的电力特种光缆应力应变研究

为解决光缆机械特性监测盲区,防止因机械性能劣化而产生的故障隐患,对光缆中光纤余长理论和BOTDA(布里渊光时域分析仪)、OTDR(光时域反射仪)监测原理进行研究。采用BOTDA监测技术,对光缆中光纤的应变进行了监测实验。结合理论分析,得出光纤应变随光缆的应力应变及机械特性变化的关系,能够对光缆机械性能劣化起到预警作用,防患于未然。     

Crumple Durable Ultraflexible Organic Solar Cells with an Excellent Power-per-Weight Performance

Ultraflexible and ultra-lightweight organic solar cells (OSCs) have attracted great attention in terms of power supply in wearable electronic systems. Here, ultrathin and ultra-lightweight OSCs, with a total thickness of less than 3 µm, with excellent mechanical properties in terms of their flexibility and ability to be stretched are demonstrated. A stabilized power conversion efficiency (PCE) of 15.5% and unprecedented power-per-weight of 32.07 W g⁻¹ at a weight of 4.83 g m⁻² is achieved, which represents one of the best-performing OSCs based on ultrathin foils substrate reported to date. The ternary strategy introduces the third component of amorphous conformation of the PC₇₁BM molecule, which can slightly reduce crystallization and aggregates without decreasing the electron mobility, thereby reducing rigidity and brittleness of the active layer. The increase in the ductility of the active layer significantly improves the mechanical flexibility of the device, resulting in over 90% retention in the PCE after 200 stretching–compression cycles. In addition, the ternary device exhibits excellent stability when stored in a N₂-filled glove box, resulting in the PCE retaining over 95% of its initial efficiency even after 1000 h. This ultraflexible and ultra-lightweight photovoltaic foils constitute a major step toward the integration of power supply into malleable electronic textiles.