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.

Advancement in Wide Area Monitoring Protection and Control Using PMU’s Model in MATLAB/SIMULINK

A big step forward to improve power system monitoring and performance, continued load growth without a corresponding increase in transmission resources has resulted in reduced operational margins for many power systems worldwide and has led to operation of power systems closer to their stability limits and to power exchange in new patterns. These issues, as well as the on-going worldwide trend towards deregulation of the entire industry on the one hand and the increased need for accurate and better network monitoring on the other hand, force power utilities exposed to this pressure to demand new solutions for wide area monitoring, protection and control. Wide-area monitoring, protection, and control require communicating the specific-node information to a remote station but all information should be time synchronized so that to neutralize the time difference between information. It gives a complete simultaneous snap shot of the power system. The conventional system is not able to satisfy the time-synchronized requirement of power system. Phasor Measurement Unit (PMU) is enabler of time-synchronized measurement, it communicate the synchronized local information to remote station.

有效避免ABB UNITROL 6800励磁系统故障导致机组跳闸的方案

ABB UNITROL 6800拥有多重冗余和多CPU配置,通道最大可达三通道。整个控制系统配有两套恒机端电压控制(AVR)、两套恒励磁电流控制(FCR)和一套备用恒励磁电流控制(BFCR),高冗余度的设计和彼此间的合理切换大大地提高了机组运行的安全性和可靠性,但ABB UNITROL 6800励磁系统测量板(CCM)本身存在一个概率极小的故障,且动作权限最高,一旦发生,将直接导致机组跳闸。介绍了一种有效避免因CCM板故障导致机组跳闸的优化方案。

Design of the Control System of Adaptive Balancing Device Based on PLC

Due to the well condition and the un-expected imbalance movement of the pumping unit in use, the energy consumes a lot. The existing balancing equipment cannot adjust and monitor the pumping units in real time. Therefore this paper introduces the new adaptive balancing equipment—fan-shaped adaptive balancing intelligent device, projects a design of such control system based on PLC, and determines the principle of the control system, the execution software and the design flow. Site commissioning effect on Daqing Oilfield shows this fan-shaped adaptive balancing intelligent device can effectively adjust and monitor the pumping unit in real time, the balance even adjusts from 0.787 to 0.901, and integrated energy saving rate is 14.2%. It is approved that this control device is professionally designed, with strong compatibility, and high reliability.

Analysis on Structural Control of Coal Distribution in the Northern Qaidam Basin,NW China

The distribution of the Jurassic coal measures in the northern Qaidam Basin is obviously controlled by the regional structures. Based on the existing data of coalfield exploration and combined with the analysis of coalfield basement structures, features of the main faults, and the distribution of coal measures, this paper brings forward a scheme of coalfield tectonic divisional units and the definition of the coal-controlling structural styles in the northern Qaidam Basin. The structure control of the distribution of coal measures is further discussed. Several stages of regional tectonic activities since the Indosinian has led to the distribution of coal measures into the characteristics of zonation from the north to south and block from east to west. The results indicate that the structural deformations are the most intense in the front of the three uplifted belts, which are characterized by the combination of thrusts. The coal measures are uplifted to the shallow formations, and are easy to be exploited, but the scale of mines is small because of serious damages by the coal distribution. On the contrary, the stress and strain are weak in the three depressions, with the coal-controlling structural styles being mainly the thrust-fold and thrust-monocline combinations. The distribution of coals in the depressions is relatively stable. The shallower part of the depression will become the key areas for exploration and development of coal resources in the northern Qaidam Basin.

An Improved Torque Sensorless Speed Control Method for Electric Assisted Bicycle With Consideration of Coordinate Conversion

In this paper,we propose an improved torque sensorless speed control method for electric assisted bicycle,this method considers the coordinate conversion.A low-pass filter is designed in disturbance observer to estimate and compensate the variable disturbance during cycling.A DC motor provides assisted power driving,the assistance method is based on the realtime wheel angular velocity and coordinate system transformation.The effect of observer is proved,and the proposed method guarantees stability under disturbances.It is also compared to the existing methods and their performances are illustrated through simulations.The proposed method improves the performance both in rapidity and stability.

Monitoring and Measuring Event Decision-Making Process Using Key Performance Indicators： Evidence From Italian Cruise Terminals

This paper investigates the control systems and coordination mechanisms applied in the relationships between cruise line companies and terminal concessionaires in the cruise events management when the ships are stopping on the quay. Using a case study methodology and focusing on the Italian context, this exploratory study, through a qualitative approach, interviewed two main cruise terminal concessionaires and indirectly observed events planned by cruise companies in sea ports selected for outlining the role of control systems, coordination, and knowledge sharing between the players in cruise events decision-making processes. The first results show that the cruise event management processes on ship berthing and on terminal are separated. The cruise companies don＇t involve terminal concessionaires in the event organization considering them only service suppliers Also, the concessionaires conceive the events planned in the cruise infrastructures as a business unit to optimize the space use, without any forms of coordination or control with cruise companies. Knowledge sharing, coordination, and control among the two players could support the planning, and management of ＂new cruise events＂ in which the visitors may be led from the infrastructure to the ships stopped on the quay. This study offers a set of key performance indicators to support the management, control, and coordination of each inter-organizational relationship identified. Managerial implications and suggestions for improving cruise events management have been provided.

测量机器人与Android通信控制及内外业协同研究

为满足测绘市场的多元化需求,进一步扩展测量机器人在远程控制、自动化作业等方面的应用,同时利用最新的设备及技术,优化传统的测量内外业作业方法,来切实提高生产效率。研究了测量机器人控制理论、Android蓝牙通信及开发理论,实现了测量机器人与Android蓝牙无线通信、远程控制及数据传输,并在此基础上提出了外业测量、数据计算及传输、图形绘制、信息反馈、成果制作等工作的多终端同步的内外业协同作业机制,并在规划测量领域进行了实践应用。

具备黑启动和构网能力的远海风电经DRU-MMC送出方案

由于具有成本低、体积重量小和可靠性高等特点,送端采用二极管整流器(DRU)、受端采用模块化多电平换流器(MMC)的送出方案在远海风电送出领域备受关注。鉴于DRU不能构建交流电网且无法倒送有功功率,文中提出一种具备黑启动和构网能力的远海风电经DRU-MMC送出方案。所提方案在DRU-MMC送出技术的基础上增加了常规小容量电压源型辅助换流器、耗能单元和必要的快速开关,通过直流海缆复用和快速开关倒闸重构拓扑,分别构建黑启动电源低压回路和风电传输高压回路,实现黑启动和功率传输2种工况在线切换;提出辅助换流器在不同运行阶段的构网控制策略,解决海上交流电网构建、DRU无功补偿和谐波抑制等问题,消除DRU-MMC送出方案对风电场类型的限制。最后,通过经济性分析和算例仿真,验证了所提方案的优越性和有效性。

新生儿重症监护病房肺炎克雷伯菌医院感染暴发事件的调查与防控

目的调查一起在新生儿重症监护病房(NICU)发生的肺炎克雷伯菌(KP)医院感染暴发事件,评价控制措施实施效果,为医院感染防控提供依据。方法采用流行病学调查和环境卫生学监测方法对2020年6-8月在NICU检出KP的患者进行原因分析并采取控制措施。结果14例检出KP的患者中,9例医院感染,KP引发的医院感染例次率高于3-5月(P<0.05)。84份环境卫生学标本,2份标本检出KP。采取综合性与针对性控制措施后,复查未检出KP,9-11月医院感染例次率显著下降(P<0.05)。结论本次事件推测为外源性的KP定植于电热烧水器托盘,经由医务人员手或水杯等物品直接或间接接触传播。通过查找感染源,采取集束化、针对性干预策略,有效控制医院感染的蔓延。

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。

GSM技术在灌溉机组远程控制中的应用

基于GSM通信技术设计一种灌溉机组远程控制系统。当需要进行灌溉系统远程控制时,利用移动终端或系统监控平台发送灌溉控制指令,控制系统当中的GSM通信模块将控制指令传输至微处理控制器,进行灌溉控制模块的驱动和触发,实现灌溉机组远程控制。试验结果表明:远程控制系统能够根据控制指令进行相关动作的控制和执行,且具有较高的通信可靠性。

故障检测与重构下基于AFTSMO的ROV三维航迹跟踪控制

针对传统的滑模观测器在缆控水下机器人(ROV)系统状态估计与故障重构过程中存在渐近收敛、无法及时准确重构故障信号的问题,提出一种基于自适应快速终端滑模观测器(adaptive fast terminal sliding mode observer)的故障检测和控制优化方法。建立带有推进器故障、未知外界干扰和模型参数不确定性等复合干扰的ROV系统故障模型;设计具有自适应特性的快速终端滑模控制器,保证所有的状态估计误差在有限时间内收敛;通过等效输出误差注入法对推进器引起的故障进行估计重构。采用Lyapunov稳定性理论验证控制系统的稳定性,仿真结果表明,所设计的故障检测方法能够快速检测和重构故障,保证ROV系统较高的跟踪精度,并通过实验验证了所提算法的有效性。

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.

燃煤机组过热汽温宽负荷模型前馈控制

为了对燃煤机组过热汽温宽负荷运行时进行更精确地前馈控制,提出一种基于物理引导神经网络(PGNN)的预测前馈信号模型,并基于间隙度量法确定了多模型的负荷段分配。多模型间隙度量PGNN预测方法采用多模型间隙度量方法对负荷区段进行合理划分,结合过热器机理引导的长短期记忆神经网络,可以对强耦合、大惯性的过热汽温宽负荷前馈信号进行精准预测。结果表明:在机组宽负荷运行时,随着负荷降低控制对象的非线性程度逐渐增强,需要更多的模型数量,采用多模型间隙度量PGNN前馈控制方法可以在不同工况下采用与当前工况相适应的前馈信号,有效提升过热汽温的调节精度和稳定性。

基于Android的测控装置人机界面的设计与开发

针对目前测控装置采用比较简单的图形软件进行界面开发不适应技术发展要求的情况,提出了利用Google的Android作为测控装置人机界面的软件开发平台,在Android的系统框架上实现测控装置的人机界面。阐述了如何对Android现有的系统框架进行裁剪和调整,使得系统更加符合测控装置人机界面的要求。利用Android提供的组件设计了测控装置人机界面的各个功能模块(规约模块、逻辑模块和CAN模块等),使得模块设计更加合理,模块之间的耦合性更小。设计了基于OMAP3530的测控装置人机界面,结果表明基于Android的测控人机界面功能更加丰富,操作更加友好,易于升级和维护,能较好地满足用户的需求。

基于周期性最大功率点检测的风电机组功率备用控制方法

风电机组通常运行于最大功率输出模式,无法为受扰电网提供紧急功率支撑。稳态时预留部分出力可提高风电机组主动电网支撑能力,为此提出一种基于周期性最大功率点(MPP)检测的风电机组功率备用控制(PRC)方法。通过周期性执行最大功率点跟踪程序检测风电机组实时MPP,一旦检测到MPP即可确定PRC模式参考值并切换为直接功率控制。设置伪单调转速-机械功率曲线使风电机组稳定运行在超速功率备用点,并通过储能装置平抑MPP检测产生的峰值功率波动。仿真结果表明提出的控制方法在定风速和变风速情况下均可以准确控制检测风电机组MPP并实现PRC,并且使得风电机组一次调频效果优于传统PRC。

Android软件在智能鱼缸远程控制系统中的应用设计

设计了一种利用Android软件实现远程控制的智能鱼缸系统,该系统包括现场自动控制和Android软件远程控制两部分。在特殊情况下,如系统断电重启、传感器故障、系统不稳定等,用户可以在最短的时间内通过Android软件对智能鱼缸系统的现场装置进行远程控制,从而降低事故发生率。经系统测试和实际运行表明,该控制系统操作灵活方便,运行稳定可靠,具有一定的参考和推广价值。

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。