Controlled remote preparation of an arbitrary four-qubit cluster-type state

Two schemes are proposed to realize the controlled remote preparation of an arbitrary four-qubit cluster-type state via a partially entangled channel. We construct ingenious measurement bases at the sender’s and the controller’s locations, which play a decisive role in the proposed schemes. The success probabilities can reach 50% and 100%, respectively. Compared with the previous proposals, the success probabilities are independent of the coefficients of the entangled channel.

Controlled Remote State Preparation

We present a scheme for remotely preparing a state via the controls of many agents in a network.In thescheme,the agents' controls are achieved by utilizing quantum key distribution.Generally,the original state can berestored by the receiver with probability 1/2 if all the agents collaborate.However,for certain type of original states therestoration probability is unit.

Designing similarity measurement with distance measure and application on laterally directional mode flight test

Similarity measure construction has been proposed as fault detection of flight test method in order to obtain the primary control surface stuck and the combination stuck of primary control.Similarity measures were obtained through analyzing the certainty and uncertainty of fuzzy membership functions,which were designed based on well-known Hamming distance.It was applied to the fault detection of primary control surface stuck of uninhabited aerial vehicle(UAV).At post-failure control surface,if the UAV is controllable and trimmable using other control surfaces,the UAV is able to fly or return to the safety region through reconfiguration of flight control system.To detect the fault,similarity measure computations were carried out.This result could be applicable with the real-time parameter estimation method.By monitoring the value of coefficients due to the control surface deviation,it becomes aware that the control surface fault occurs or not.The control surface stuck position and value were separated by comparing the trim value with the reference value.This is the advantage of increasing in reliability without adding sensors or with additional low cost.

Remote interactions on two distributed quantum systems:nonlocal unambiguous quantum-state discrimination

Remote quantum-state discrimination is a critical step for the implementation of quantum communication network and distributed quantum computation. We present a protocol for remotely implementing the unambiguous discrimination between nonorthogonal states using quantum entanglements, local operations, and classical communications. This protocol consists of a remote generalized measurement described by a positive operator valued measurement （POVM）. We explicitly construct the required remote POVM. The remote POVM can be realized by performing a nonlocal controlled-rotation operation on two spatially separated qubits, one is an ancillary qubit and the other is the qubit which is encoded by two nonorthogonal states to be distinguished, and a conventional local Von Neumann orthogonal measurement on the ancilla. The particular pair of states that can be remotely and unambiguously distinguished is specified by the state of the ancilla. The probability of successful discrimination is not optimal for all admissible pairs. However, for some subset it can be very close to an optimal value in an ordinary local POVM.

远隔缺血后适应治疗对急性缺血性卒中超时间窗患者临床预后的影响:一项随机对照试验

背景急性缺血性卒中(AIS)高发,及时恢复脑血流是治疗的关键,超时间窗就诊患者无更多促进脑血流恢复的治疗手段。研究远隔缺血后适应(RIPostC)治疗对AIS超时间窗就诊患者的临床疗效、并发症和预后,具有重要的临床意义。目的探究RIPostC治疗对AIS超时间窗患者干预的影响,为超时间窗就诊的AIS患者寻求安全、有效的脑血流恢复治疗方式。方法本研究采用随机、分组、安慰剂对照法进行试验。选取2021-09-02—2022-08-31于北京航天总医院神经内科病房住院治疗的超溶栓时间窗(发病时间>6 h)的AIS患者为研究对象。依据随机数字表法将患者分为对照组和试验组。试验期+随访期共90 d,均使用同等的一般治疗、脑血管病常规治疗,试验组在此基础上给予RIPostC治疗14 d(28次),对照组给予模拟的RIPostC治疗14 d(28次)。在干预前和干预后30 d、干预后90 d,采用改良Rankin量表(mRS)、美国国立卫生研究院卒中量表(NIHSS)评估两组患者神经功能,简易精神状态检查量表(MMSE)、蒙特利尔认知评估量表(MoCA)评估患者认知功能,工具性日常生活能力量表(IADL)评估日常生活能力,焦虑自评量表(SAS)、抑郁自评量表(SDS)评估精神状态,经颅多普勒超声(TCD)评估脑血流速度,以白介素(IL)-6反映炎症情况。结果122例患者中,最终完成试验及随访99例,其中试验组49例,对照组50例。两组患者性别、年龄、基础疾病(高血压、糖尿病、冠心病)及基线NIHSS评分比较,差异无统计学意义(P>0.05)。重复测量方差分析结果示,时间与组别对MMSE、MoCA、mRS、NIHSS、脑血流速度、IL-6存在交互作用(P<0.05),时间和组别对MMSE、MoCA、NIHSS、脑血流速度、IL-6主效应显著(P<0.05),时间对mRS、SAS、SDS、IADL主效应显著(P<0.05)。试验组干预后30、90 d MMSE、MoCA评分及脑血流速度均高于对照组,mRS、NIHSS评分均低于对照组(P<0.05);试验组干预后30、90 d SDS、IADL评分低于对照组(P<0.05);试验组干预后30 d SAS评分高于对照组,IL-6低于对照组(P<0.05)。99例患者中共有23例患者发生不良反应,其中试验组17例,对照组6例,两组皮肤瘀点、头晕、心慌、胸闷发生率比较,差异无统计学意义(P>0.05);对照组患者皮肤瘀斑发生率[4.00%(2/50)与12.24%(6/49)]、总不良反应发生率[12.00%(6/50)与34.69%(17/49)]低于试验组(P<0.05)。结论RIPostC治疗可降低AIS患者的炎症反应,对神经功能、认知功能抑郁情绪及颅内血流速度可起到积极的改善效果。

录井仪远程测控系统软件设计与实现

随着科技的发展,数字化转型已经成为石油勘探行业的重要趋势。远程测控是实现数字化转型的重要手段之一,能够增强企业的竞争力,为此设计开发了录井远程测控系统软件。首先说明了录井远程测控系统软件的功能模块,接着介绍了远程测控系统软件主要功能的设计与实现,最后总结了系统的远程控制、远程诊断等特点。该系统经过现场测试,运行稳定,效果良好。

The real-time measurement of welding temperature field and closed-loop control of isotherm width

The real-time measurement of welding temperature field by colorimetric method is described, and with the data acquired from it closed-loop control system of the parameters of temperature field is developed and tested. Experimental results prove that it has high measurement speed (time of a field within 0.5 s) and good dynamic response quality. Weld penetration can be controlled satifactorily under unstable welding condition.

Remote-controlled flexible pose measurement system and method for a moving target in wind tunnel

The measurement of position and attitude parameters for the isolated target from a highspeed aircraft is a great challenge in the field of wind tunnel simulation technology. This paper proposes a remote-controlled flexible pose measurement system in wind tunnel conditions for the separation of a target from an aircraft. The position and attitude parameters of a moving object are obtained by utilizing a single camera with a focal length and camera orientation that can be changed based on different measurement conditions. Using this proposed system and method, both the flexibility and efficiency of the pose measurement system can be enhanced in wind tunnel conditions to meet the measurement requirements of different objects and experiments, which is also useful for the development of an intelligent position and attitude measurement system. The position and the focal length of the camera also can be controlled remotely during measurements to enlarge both the vertical and horizontal measurement range of this system. Experiments are conducted in the laboratory to measure the position and attitude of moving objects with high flexibility and efficiency, and the measurement precision of the measurement system is also verified through experiments.

Remoting技术在工业远程测控系统中的应用研究

在工业分布式测控通信系统中,Microsoft.NET Remoting技术可以在应用程序内部或应用程序域之间传输数据。采用Remo-ting技术结合二进制流的方法,通过远程对象和数据接口的建立,以及服务器端和客户端的设置,可以在软件各个结构层之间进行快速高效的远程对象访问,达到实时控制的目的。该方案使测控仪表具有更好的开放性和可集成能力,有一定的参考和实用价值。

基于PLC的自动测流机器人系统设计

针对当前河道测流存在的效率和自动化程度较低、测量模式单一等问题,提出了一套基于可编程逻辑控制器(PLC)的河道自动测流机器人系统设计与实现方案。该机器人系统由运动系统、采集系统、人机交互以及远程通信四大模块组成。首先,设计了自动测流机器人系统的硬件结构,实现了自动测流机器人在河流轨道上运动、铅鱼收放等功能。然后,开发了基于PLC的测控系统,设计了PLC梯形图和硬件连接方案,实现了自动测流机器人运动控制。最后,自动测流机器人系统通过RS-485通信协议将多传感器采集的数据传输到操控屏,结合4G远程技术,实现了采集数据和操作指令的远程传输。通过现场模拟的采集测试,该机器人系统可实现自动测流、远程操控、故障自检等功能,并提供多种测量模式,满足河道测流的使用需求。该系统的设计为开展智能化河流数据采集的研究奠定了基础。

DTS传感主机智能云监控系统的设计与实现

分布式光纤温度传感(Distributed optical fiber Temperature Sensing system,DTS)技术采用通信光纤本身作为传感和信号传输介质,由于可以实现大范围高精准度的温度测量,在众多领域获得广泛应用。针对分布式光纤温度传感主机在野外长期使用过程中面临的智能管控能力的不足,采用STM32F429处理器为核心,设计了应用于DTS的远程云监控模块,以实现低功耗、全时监控、长效检测能力的提升。系统软件部分采用直接存储器访问(DMA)的方式搬运数据,结合RS-232、单总线、SPI协议及4G无线通信进行数据传输,并利用数据预处理算法实现了异常变化温度数据准确上传,并大大减少数据通信流量。模块的电源管理功能可实现电池续航时间提高3.7倍~6.6倍,整体功耗小于12 W。户外长期测试结果表明,基于STM32的DTS远程云监控模块具备工作稳定、数据完整、功耗低等优势,提升了DTS传感主机野外应用的可靠性。

Controlled cyclic remote preparation

Multi-party quantum communication has gradually attracted widespread attention.To realize the perfect transmission of quantum states among multiple participants,a novel multi-party controlled cyclic remote preparation protocol for arbitrary single-qubit states with three senders is proposed.With the permission of one controller,each sender can transmit an arbitrary singlequbit state to its neighbor.In addition,we give a universal protocol for multi-party controlled cyclic remote preparation of arbitrary single-qubit states in the case of multiple senders,which can realize deterministic cyclic preparation of multiple quantum states in one direction.The scheme shows that the communication task can be successfully achieved only if all senders cooperate with the controller,and there is no need for the senders to employ information splitting and additional operations before performing measurements.Finally,we discuss the cyclic remote preparation protocol with three senders under five types of noisy environment,and the closeness between the output state and original state is measured by calculating fidelity.

物流设备PLC远程监控平台构建及应用研究

该文深入探讨昆明卷烟厂物流科物流设备PLC远程监控平台的构建及应用。详细阐述PLC在物流设备中的关键作用以及面临的故障问题,强调构建远程监控平台的紧迫性。全面介绍项目的背景、实施细节、创新点、实施效果、可推广性、成果固化情况以及对未解决问题的管控措施,并通过效果验证证实该项目的有效性和可行性。

矿山地质环境调查与防治措施研究

由于矿山地质本身存在一定特殊性,经常会因各种因素引起不同程度的自然灾害,从而严重威胁附近居民的生命财产安全,很大程度限制区域经济发展。基于此,本文简单分析矿山地质环境调查内容及调查方法,并深入探讨矿山地质灾害防治措施及实际案例应用,以供参考。

航标遥测遥控风险识别和管控

结合航标管理工作实际,从航标遥测遥控的系统安全、终端设备性能、外部环境影响及数据监控等方面详细阐述航标遥测遥控所存在的风险点,并分析相关风险点的原因,进而给出相关预防措施,以实现对航标遥测遥控系统的风险管控。

城市轨道信号智能测量车运动控制系统方案设计

针对城市轨道信号系统运维人员严重不足、检测手段落后等问题。介绍了城市轨道信号智能测量车运动控制系统,开发了1套自主移动的城市轨道信号工程数据定测与智能感知装备,包含信号设备自动定位及指示、信号设备建筑限界的自动测量和轨道电路参数的车载测量装置三大部分。该装置可减少人工劳动强度,提升作业效率,以利于施工单位快速完成数据测量、喷字标识、轨道电参数测量和信号设备建筑限界测量等工作。

无人防疫送餐小车设计与应用

研发了一款基于STM32的无人防疫送餐小车,以解决特殊人员送餐和监测的需求。该小车搭载高清第一视角(FPV)摄像头,可远程控制送餐并在途中进行环境消毒。到达目的地后,小车能够测量患者的体温并将数据实时上传至云端监测。其具备的无线音频传输功能还能够实现操作人员与隔离人员的远程沟通。经过测试,该小车能够实现以上功能,显著提高送餐效率,确保隔离人员的安全与健康,适用于多种场景,如医疗机构、养老院或企业内部,为无接触送餐服务提供了可行的解决方案。

Controlled Remote Preparing of an Arbitrary 2-Qudit State with Two-Particle Entanglements and Positive Operator-Valued Measure

We present a scheme for symmetric controlled remote preparation of an arbitrary 2-qudit state form a sender to either of the two receivers via positive operator-valued measurement and pure entangled two-particle states. The first sender transforms the quantum channel shared by all the agents via POVM according to her knowledge of prepared state. All the senders perform singIe- or two-particle projective measurements on their entangled particles and the receiver can probabilisticaly reconstruct the original state on her entangled particles via unitary transformation and auxiliary qubit. The scheme is optimal as the probability which the receiver prepares the original state equals to the entanglement of the quantum channel. Moreover, it is more convenience in application than others as it requires only two-particle entanglements for preparing an arbitrary two-qudit state.

农田耕后地表微地貌自走遥控测量装置设计与试验

针对油菜精量联合直播机作业后,田间作业厢面微地貌形状特征参数测量困难、传统测量方法存在测量效率和误差难以兼顾、现有测量装置操作便捷性不够的问题,设计了一种自走遥控地表微地貌测量装置。该装置主要由行走部件和微地貌测量系统组成,装置可以通过遥控操作到达指定测量区域并通过手机APP控制激光雷达扫描作业高度和扫描作业速度及实时显示测量装置测量状态信息,实现农田耕后地表微地貌特征高效测量。对装置行走部件悬挂避振机构和驱动机构行走驱动力进行了设计和分析,确定了弹簧避振器中圆柱螺旋压缩弹簧参数和驱动机构驱动电机参数;对微地貌测量系统控制单元硬件和软件进行了设计,确定了控制单元硬件电路和软件工作流程;对装置倾斜误差和系统误差进行了分析,消除了装置倾斜误差和系统误差。开展了装置田间测量试验,对地表厢面微地貌特征及畦沟沟型进行了测量,结果表明:相较于传统针板法测量方式,所开发的微地貌测量装置测量油菜直播机作业后的地表微地貌特征,获得的厢面平整度特征参数高度均方根、表面相关长度、畦沟平均沟宽、沟宽稳定性系数、平均沟深和沟深稳定性系数误差分别为4.01%、4.81%、3.70%、1.34%、2.09%和2.89%。研究为油菜精量联合直播机等机具农田作业后厢面地表微地貌特征测量提供参考。

基于应急救援的远程测控便携式制氧机的研制

目的研发一套适用于灾害现场紧急医学救援的可远程测控的便携式制氧机系统。方法综合优化变压吸附技术,通过供给大流量清洁干燥气源和开发相关核心组件,提高制氧主机空气源的有效使用回收率,实现氧气浓度、产氧流量、产氧压力指标实时监控;通过轻量化设计部件及结构,符合灾害现场特点的便携式可移动特征;结合多变自调整式产氧设计,适应现场环境的广谱适应性;通过数字化控制系统人机界面与通用分组无线技术实时在线监控及浏览参数,构建便捷、稳定的智能操作平台,开发远程监控端实时与客户互动设备的运行状态信息。结果应急场景模拟演练结果表明,该便携式制氧机可移动(95 kg)、输出压力稳定(0.38~0.45 MPa)、流量稳定(15~20 L/min),连接本便携式制氧机可以基本保障急救呼吸机的供氧需求。当呼吸机输出氧浓度达到90%以上时,便携式制氧机实际测得氧气浓度为94.4%、产氧流量为21 L/min、产氧压力为0.404 MPa,输出氧气的理化指标符合GB 8982-2009《医用及航空呼吸用氧》标准。同时在运行过程中,触摸屏人机界面可以实时显示便携式制氧机运行状态,以及自行设置运行参数,实现远程操作并实时监控运行状态。结论研制的远程测控便携式制氧机装置工作响应速度快、转运方便、制氧效率高、操作简便,符合便携式的要求,可用于灾害环境下紧急医学救援的气体供应。