基于Socket接口的局域网聊天系统设计

文章在对TCP/IP通信协议研究的基础上,设计一种基于Java平台的局域网即时聊天系统,系统利用Wi-Fi局域网络,采用C/S框架,各Java客户端基于Socket传输文本消息,能够实现注册、登录、在线聊天以及离线消息获取等功能。本系统还采用了多线程技术实现多客户端与服务器的并发式通信,能有效地提高网络资源利用率,以此来缓解服务器的通信压力。

Superior rectus/levator complex in acquired anophthalmic socket repaired with spheric implant—a computed tomography scan and topographic study

AIM:To determine whether the levator palpebrae superioris(LPS)/superior rectus(SR)muscle complex,can influence the position of the upper lid and fornix in acquired anophthalmic sockets.METHODS:This comparative non-randomized and non-interventional study included retrospective data of 21 patients with unilateral acquired anophthalmic sockets repaired with spheric implants.High-resolution computed tomography(CT)measurements of the LPM/SR muscle complex and clinical topographic position of the upper lid,superior and inferior fornix depth in primary gaze position were evaluated.Demographic data were presented as frequency and percentage proportions and quantitative variables comparing the socket measurements with the normal contralateral orbit was statistically analyzed using non-parametric tests considering P<0.05.RESULTS:The anophthalmic orbits had a significantly shorter LPS length(P=0.01)and significantly thicker SR(P=0.02)than the normal orbit.Lagophthalmos was present in anophthalmic sockets but not in normal orbits(P=0.002),while levator function was normal in both(P>0.05,all comparisons).The superior fornix depth was similar in the anophthalmic socket and the contralateral normal orbit(P=0.192)as well the inferior fornix depth(P=0.351).CONCLUSION:Acquired anophthalmic sockets repaired with spheric implants have shorter LPS,thicker SR,and more lagophthalmos than normal orbits.The relationship of the LPS and SR with other orbital structures,associated with passive or active forces acting in the final position of the lids and external ocular prosthesis should be further investigated.

基于IPv6的Socket网络编程接口技术与实现

本文主要探讨基于互联网协议第6版(Internet Protocol Version 6,IPv6)的Socket网络编程接口技术与实现。首先介绍了IPv6和Socket编程的基础知识,分析了IPv6环境下Socket编程的特点与关键技术。然后讲述了基于IPv6的Socket网络编程接口的实现过程,包括环境搭建、客户端与服务器端的编程实现。最后进行了性能测试与优化分析,为IPv6网络环境下的Socket编程提供了理论与实践的参考。

一种基于Socket通信的嵌入式设备测试方案

嵌入式设备的一个主要特征就是其对高实时性的要求。这样嵌入式测试程序就无法在传统的非实时操作系统上运行,而是需要运行在一款实时操作系统上,因此,在嵌入式测试人机交互界面上易用性方面就会受限。目前主流的方案是测试程序采用上位机加下位机分离的体系结构来解决操作和可视问题。研究了一种基于Socket通信的嵌入式设备自动化测试方案,解决了上位机加下位机测试结构上的通信难题。

vsocket:一种基于RDMA的兼容标准套接字加速方法

为了兼容Linux标准套接字,同时利用RDMA提高使用套接字的程序的性能,提出在上层应用与底层RDMA之间搭建一个中间件——Viscore Socket adaptor(简称vsocket);通过拦截socket API,将上层应用通过套接字收发的数据流无缝转接到RDMA承载上。vsocket绕过管理收发缓冲区的内核,针对TCP和UDP分别实现了用户空间的内存管理机制,使用RC类型的RDMA网络支持TCP加速,使用UD类型的RDMA网络支持UDP加速,并重用Linux UDP来辅助其路由。实验结果表明vsocket能够保证Linux标准套接字接口的兼容性,提升网络性能,摆脱Linux内核网络协议栈的限制,改善收发数据的延迟与带宽。

Socket技术在医疗检验设备远程管理中的应用研究

本文介绍了Socket技术在医疗设备远程管理中的应用,并从Socket技术的历史、结构、优缺点、Socket技术在医疗检验设备远程管理中的应用等方面进行了深入的分析。在医院检验科的医疗检验设备中,Socket技术的应用可以有效地提高医院检验科的工作效率,实现医院检验科医疗检验设备的自动化操作,改善医疗检验设备的管理水平,提高安全性。

Strictly non-blocking 4×4 silicon electro–optic switch matrix

The first path-independent insertion-loss（PILOSS） strictly non-blocking 4×4 silicon electro–optic switch matrix is reported. The footprint of this switch matrix is only 4.6 mm×1.0 mm. Using single-arm modulation, the crosstalk measured in this test is-13 dB --27 dB. And a maximum crosstalk deterioration of 6d B caused by two-path interference is also found.

Non-Blocking Join Algorithm Based on Hash-Merge for Improving Query Response Times

In data streams or web scenarios at highly variable and unpredictable rates, a good join algorithm should be able to ＂hide＂ the delays by continuing to output join results. The non-blocking algorithms allow some tuples to be flushed onto disk, with the goal of producing results continuously when data transmission is suspended. But state-of-the-art algorithms have trouble with the constraint of allocated memory. To make better use of memory, a novel non-blocking join algorithm based on hash-merge for improving query response times is proposed. The reduced data structure of in-memory tuples helps to improve memory utility. A replacement selection tree is applied to adjust memory by expanding or shrinking the size of the tree and separates one external join transaction into multi-subtasks. In addition, a cost model to estimate task output rate is proposed to select the in-disk portion that promises to produce the fastest results in the external join stage. Experiments show that the technique, with far less memory, delivers results faster than the three non-blocking join algorithms （ XJoin, HMJ and RPJ ） , with up to almost two-fold improvement in reliable network and one order of magnitude improvement in unreliable network in terms of the number of the reported tuples.

MSONoC: a non-blocking optical interconnection network for inter cluster communication

Electric router is widely used for multi-core system to interconnect each other. However, with the increasing number of processor cores, the probability of communication conflict between processor cores increases, and the data delay increases dramatically. With the advent of optical router, the traditional electrical interconnection mode has changed to optical interconnection mode. In the packet switched optical interconnection network, the data communication mechanism consists of 3 processes: link establishment, data transmission and link termination, but the circuit-switched data transmission method greatly limits the utilization of resources. The number of micro-ring resonators in the on-chip large-scale optical interconnect network is an important parameter affecting the insertion loss. The proposed λ-route, GWOR, Crossbar structure has a large overall network insertion loss due to the use of many micro-ring resonators. How to use the least micro-ring resonator to realize non-blocking communication between multiple cores has been a research hotspot. In order to improve bandwidth and reduce access latency, an optical interconnection structure called multilevel switching optical network on chip(MSONoC) is proposed in this paper. The broadband micro-ring resonators(BMRs) are employed to reduce the number of micro-ring resonators(MRs) in the network, and the structure can provide the service of non-blocking point to point communication with the wavelength division multiplexing(WDM) technology. The results show that compared to λ-route, GWOR, Crossbar and the new topology structure, the number of micro-ring resonators of MSONoC are reduced by 95.5%, 95.5%, 87.5%, and 60% respectively. The insertion loss of the minimum link of new topology, mesh and MSONoC structure is 0.73 dB, 0.725 dB and 0.38 dB.

An innovative orbital implant positioner for the proper restoration of eye-socket defects

Fractures to the orbital walls and floor must be appropriately managed to avoid severe conditions.This results in particularly challenging anatomical reconstructions.The main issues are the implant’s proper shaping,placement,and orientation onto the eye socket.A new,customized implant-shaping mould has already been developed to shape patient-specific implants.However,it still does not address the implant positioning in the fractured orbital cavity.

基于Socket技术的HyperMesh集成方法

为解决HyperMesh应用程序与其他系统间的实时数据传输问题,提出一种基于Socket技术的HyperMesh集成方法,先设计总体集成框架,后对客户端和服务端实现核心进行详细论述,最后开发测试系统。结果表明,该集成方法能很好地实现系统间数据的互联互通。

基于WebSocket协议的网页即时通信系统研究与实现

随着用户对Web信息即时性要求的提高,一种不需要客户端,完全基于网页,提供定制化服务,在社区、论坛、电商网站中提供即时交流互动和服务的技术应运而生。对比HTTP和WebSocket 2种协议,文章设计了一种基于WebSocket协议的网页即时聊天系统,通过全双工消息传递,在浏览器和服务器之间创建了一条快速通道,实现了实时性要求,降低了服务器的资源占用率。聊天系统提供了用户登录、上线提醒、下线提醒和群发消息等功能,在保持传统B/S即时通信系统易扩展和易管理特点的同时,在带宽占用、消息收发时延方面具有显著的性能优势。

The Role of Leukocyte and Platelet-Rich Fibrin in Enhancing the Healing of Extraction Sockets: An Overview of the Literature

Introduction: Leukocyte and platelet-rich fibrin (L-PRF) is an emerging material in dentistry, however, there are controversies surrounding its effectiveness. Despite the amount of literature available, debates regarding its effect continue. This review aims to summarize and clarify the data surrounding the use of L-PRF in promoting the healing of extraction sockets, which may offer a better outcome for future treatments. Purpose: The purpose of this review is to evaluate the current literature on the use of L-PRF in promoting the healing of extraction sockets, and to provide a comprehensive overview of the available evidence. Methods: A comprehensive computer-based search of databases such as PubMed, Medline, and Cochrane Library was conducted. Results: The results of this review suggest that L-PRF has shown promise in promoting early healing of extraction sockets, but the evidence for its effectiveness over a longer period is limited. Conclusion: Although L-PRF has shown promising results in the early healing periods, its effectiveness over a longer healing period cannot be confirmed based on the available data. More clinical trials with standardized protocols and consistent measurement methods are needed to establish the role of L-PRF in enhancing the healing of extraction sockets.

基于Socket的安全生产监督平台设计

为加强对工程施工现场中的起重机械、电梯等特种设备的监督管理,设计了一套基于Socket通信技术的内部管理系统。该系统包括登录界面、通信界面和操作界面。在登录界面,介绍了窗口界面设计和身份验证设计全过程;在通信界面,对Socket通信流程、通信界面组成等进行了全面描述;在操作界面,叙述了系统功能及操作方式。对系统的全面测试,测试结果表明:系统各个界面设计合理,方便操作,速度较快,满足设计要求,可实现文件存储与传输,便于远程监管。

基于Socket接口的污水厂自动化数据采集系统

介绍了PLC使用Socket接口将采集的工业自动化系统中的数据传送到服务器,数据经过编码解码、校验后提供给手机客户端、数字孪生、智慧水务等水处理信息化系统应用,这种方式可以更加灵活地将数据传送到指定服务器,以供各种信息化系统使用。

道路环境与驾驶行为数据同步采集系统研发

高精度、可移植、多维度的在途车辆及其周边驾驶环境数据在L3级及以上自动驾驶汽车场景库测试、不良驾驶行为谱构建以及在途实时交通管控等领域有至关重要的作用,由单一传感器构成的数据采集系统在精度、维度上都受到了较大限制,导致其可靠度较低;为实现多类数据传感器协同一体化,研发了一款包含激光雷达、车载运动测量与组合定位、车载踏板与方向盘位移传感器和雷视道路多维感知一体机的多模块道路环境数据与驾驶行为同步采集系统,支持多项交通数据采集任务的并行处理,融合了用户的真实驾驶行为,并基于该系统设计了依维柯某车型的数据实车采集平台;该系统由上位机与下位机两个子系统构成,集成了多模块数据采集、储存、传输与标定等功能,且对各个模块完成了时间同步处理,适用于两客一危场景,并设计了易操作的上位机用户交互界面,对多模块数据实现实时可视化,直观查看各时段数据的变化规律,具有较高的应用价值。

船舶无线网络的节点数据采集方法

为准确实现对船舶运行状态的实时监控和数据分析,及时发现潜在的问题和风险,设计船舶无线网络的节点数据采集方法。该方法以分布式追踪系统Zipkin为基础,设计无线网络节点数据采集技术框架,在该技术框架内,用户通过连接分布式追踪系统Zipkin,使用分布式追踪系统Zipkin内的传感器对船舶无线网络节点进行追踪后,对分布式追踪系统Zipkin内的传感器节点和船舶无线网络节点布局进行优化处理,再通过节点数据采集控制器从优化后的船舶无线网络节点内采集数据,同时通过Socket通信协议对节点数据进行缓存后,发送到服务器端,服务器端启动处理线程和同步线程,以广播的方式将采集到的船舶无线网络节点数据发送给用户,实现船舶无线网络的节点数据采集。实验表明,该方法具备较强的传感器节点和无线网络节点布局优化能力,可有效采集船舶无线网络节点上的信号和数据,应用性能较强。

基于嵌入式的温室大棚远程视频监控系统设计与实现

针对农业大棚环境复杂等问题,开发基于嵌入式的温室大棚远程视频监控系统。系统以Hi3519AV100处理器为核心,利用红外摄像头、V4L2技术、视频压缩技术采集温室大棚视频信息,通过5G无线网络、socket网络编程将视频信息发送至数据库服务器及Android手机端,经测试验证系统满足温室大棚远程实时监控要求。

压弯扭作用下新型承插装配式桥墩的抗震性能

为明确并提升承插式拼装桥墩抵抗压弯扭等复合荷载的能力,提出了一种结合灌浆套筒和承插口组合连接的新型承插装配式墩,通过复合荷载作用下的拟静力试验对比了现浇(reinforced concrete,RC)、灌浆套筒(grouting and sleeve,GS)、承插口(socket with ultra-high performance concrete,SU)和结合套筒连接钢筋的新型承插(grouting sleeve and socket with ultra-high performance concrete,GSU)连接拼装桥墩的损伤机理和滞回性能,结合有限元模型重点讨论了承插口深度对滞回性能的影响。结果表明:4个构件的破坏模式都是以受弯破坏为主的弯扭破坏,其中SU构件出现了轻微拔起的现象,而对应的GSU构件并未出现该现象,与RC构件接近;各构件的剪力-墩顶位移骨架发展趋势比较一致,由于GSU构件纵向钢筋连续,具有更好的整体性能,其抗弯承载力与RC构件接近,且明显大于SU和GS构件,4个构件弯曲滞回耗能较为接近;承插口深度为1.0倍截面宽度的GSU构件抗扭承载力略高于RC构件,且明显大于其余装配式墩,GSU构件的扭转刚度、延性系数和耗能能力均大于其他3个墩;当承插口深度采用0.5倍构件截面宽度时,新型承插GSU构件的抗弯和抗扭承载力均略高于整体现浇构件,具有良好的抵抗压弯扭荷载的能力,可以实现浅承插口连接。研究结果可为压弯扭复合作用下装配式墩的应用提供试验依据。

浓缩生长因子在复杂牙拔除后牙槽窝处理中的应用

目的观察浓缩生长因子(CGF)在复杂牙拔除后牙槽窝处理中的应用效果。方法90例接受复杂牙拔除的患者随机分为两组,观察组采用CGF处理牙槽窝,对照组采用牙槽窝常规处理,比较两组的牙槽嵴宽度和高度、牙槽嵴骨量。结果术后30 d、90 d,观察组的牙槽嵴宽度、高度均高于同期对照组(P<0.05)。术后90 d,两组的REC均升高,且观察组的REC高于对照组(P<0.05)。结论CGF用于复杂牙拔除后牙槽窝的处理可有效维持牙槽嵴的高度及宽度,防止拔牙后牙槽骨吸收。