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基于广义量测的地区电网T接线路故障测距系统 被引量:2
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作者 张学清 梁中会 +5 位作者 张莹 孙祝寿 韩振兴 韩日东 王成福 梁军 《济南大学学报(自然科学版)》 CAS 北大核心 2018年第2期83-88,共6页
为了快速定位110 kV地区电网中的T接线路故障点,提出并建立一种采用广义量测方法的T接线路故障测距系统,该系统由分布式采样终端、通讯网络以及综合分析研判中心3层网络结构构成;分布式采样终端以场检测原理为基础,通过无接触式感应行... 为了快速定位110 kV地区电网中的T接线路故障点,提出并建立一种采用广义量测方法的T接线路故障测距系统,该系统由分布式采样终端、通讯网络以及综合分析研判中心3层网络结构构成;分布式采样终端以场检测原理为基础,通过无接触式感应行波采集装置采集行波的突变信号,再由通讯网络传送至综合分析研判中心进行测距分析。结果表明:无接触式行波感应装置以场检测为基础,可替代传统的电压或电流互感器,减少停电安装对电网运行造成的影响;通过对某地区电网的110 k V线路T接线进行分析,发现行波采集测距理论可较好地解决该地区电网的故障测距问题。 展开更多
关键词 广义量测 地区电网 T接线路 故障 行波法
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一种基于广义量测横向关联的统一建模方法 被引量:1
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作者 许爱东 李鹏 +5 位作者 郭晓斌 陈波 蒋愈勇 周淑雄 徐延明 徐雪荣 《电网与清洁能源》 北大核心 2015年第2期83-86,共4页
提出了一种采用广义量测横向关联方式的统一建模方法,其目的是在巡维中心所涉及的各类数据信息抽象建模的基础上,采用广义量测横向关联的方式进行统一建模,以达到对实际系统的抽象,通过模型对实际生产中的自动化数据和各类设备进行控制... 提出了一种采用广义量测横向关联方式的统一建模方法,其目的是在巡维中心所涉及的各类数据信息抽象建模的基础上,采用广义量测横向关联的方式进行统一建模,以达到对实际系统的抽象,通过模型对实际生产中的自动化数据和各类设备进行控制和管理。同时定义符合此思路的元模型,元模型包含了领域知识,它约束建模行为,保证建模阶段建立的模型是遵循领域约束的。此方法提高了解决问题的抽象层次,使得建立在此平台上的高级应用模块可以把关注点放在问题逻辑本身而不是底层实现的细节或者各种杂乱数据的组织,提高了软件开发的效率和正确率,缩短了开发的周期。 展开更多
关键词 广义量测 横向关联 统一建模 巡维中心
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Multivariable Decoupling Predictive Control with Input Constraints and Its Application on Chemical Process 被引量:13
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作者 苏佰丽 陈增强 袁著祉 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2006年第2期216-222,共7页
A constrained decoupling (generalized predictive control) GPC algorithm is proposed for MIMO (malti-input multi-output) system. This algorithm takes account of all constraints of inputs and their increments. By solvin... A constrained decoupling (generalized predictive control) GPC algorithm is proposed for MIMO (malti-input multi-output) system. This algorithm takes account of all constraints of inputs and their increments. By solving matrix equations, the multi-step predictive decoupling controllers are realized. This algorithm need not solve Diophantine functions, and weakens the cross-coupling of the variables. At last the simulation results demon- strate the effectiveness of this proposed strategy. 展开更多
关键词 chemical process control multivariable system OPTIMIZATION predictive control input constraint
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Quantum Generalized Measurement and Deterministic Generation of Maximum Entangled Pure State 被引量:1
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作者 ZHANG Ming DAI Hong-Yi +1 位作者 HU De-Wen XIE Hong-Wei 《Communications in Theoretical Physics》 SCIE CAS CSCD 2006年第5X期833-837,共5页
We propose the concept of the quantum generalized projector measurement (QGPM) for finite-dimensional quantum systems by studying the quantum generalized measurement. This research reveals a distinguished property o... We propose the concept of the quantum generalized projector measurement (QGPM) for finite-dimensional quantum systems by studying the quantum generalized measurement. This research reveals a distinguished property of this quantum generalized measurement: no matter what the system state is prior to the measurement and what the result of the measurement occurs, the state of the system after the measurement can be collapsed into any specified pure state, i.e., the state of quantum system can be deterministically reduced to any specified pure state just by a single QGPM. Subsequently. QGPM can be used to deterministically generate the maximum entangled pure state for quantum systems. We give three concrete theoretic schemes of generating the maximum quantum entangled pure states for two 2-Jevel particles, three 2-level particles and two 3-Jevel particles, respectively. 展开更多
关键词 quantum generalized measurement maximum entanglement state
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Introducing atmospheric angular momentum into prediction of length of day change by generalized regression neural network model 被引量:9
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作者 王琪洁 杜亚男 刘建 《Journal of Central South University》 SCIE EI CAS 2014年第4期1396-1401,共6页
The general regression neural network(GRNN) model was proposed to model and predict the length of day(LOD) change, which has very complicated time-varying characteristics. Meanwhile, considering that the axial atmosph... The general regression neural network(GRNN) model was proposed to model and predict the length of day(LOD) change, which has very complicated time-varying characteristics. Meanwhile, considering that the axial atmospheric angular momentum(AAM) function is tightly correlated with the LOD changes, it was introduced into the GRNN prediction model to further improve the accuracy of prediction. Experiments with the observational data of LOD changes show that the prediction accuracy of the GRNN model is 6.1% higher than that of BP network, and after introducing AAM function, the improvement of prediction accuracy further increases to 14.7%. The results show that the GRNN with AAM function is an effective prediction method for LOD changes. 展开更多
关键词 general regression neural network(GRNN) length of day atmospheric angular momentum(AAM) function prediction
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Behavior Measurement Model Based on Prediction and Control of Trusted Network 被引量:5
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作者 Gong Bei Zhang Jianbiao +1 位作者 Shen Changxiang Zhang Xing 《China Communications》 SCIE CSCD 2012年第5期117-128,共12页
In order to construct the trusted network and realize the trust of network behavior,a new multi-dimensional behavior measurement model based on prediction and control is presented.By using behavior predictive equation... In order to construct the trusted network and realize the trust of network behavior,a new multi-dimensional behavior measurement model based on prediction and control is presented.By using behavior predictive equation,individual similarity function,group similarity function,direct trust assessment function,and generalized predictive control,this model can guarantee the trust of an end user and users in its network.Compared with traditional measurement model,the model considers different characteristics of various networks.The trusted measurement policies established according to different network environments have better adaptability.By constructing trusted group,the threats to trusted group will be reduced greatly.Utilizing trusted group to restrict individuals in network can ensure the fault tolerance of trustworthiness of trusted individuals and group.The simulation shows that this scheme can support behavior measurement more efficiently than traditional ones and the model resists viruses and Trojans more efficiently than older ones. 展开更多
关键词 trusted network behavioral predic-tive control SIMILARITY trust measurement
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Hypothesis testing analysis and unknown parameter estimation of GPS signal detection 被引量:3
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作者 张文 M.Ghogho 《Journal of Central South University》 SCIE EI CAS 2012年第5期1290-1301,共12页
Hypothesis testing analysis and unknown parameter estimation of both the intermediate frequency(IF) and baseband GPS signal detection are given by using the generalized likelihood ratio test(GLRT) approach,applying th... Hypothesis testing analysis and unknown parameter estimation of both the intermediate frequency(IF) and baseband GPS signal detection are given by using the generalized likelihood ratio test(GLRT) approach,applying the model of GPS signal in white Gaussian noise,It is proved that the test statistic follows central or noncentral F distribution,It is also pointed out that the test statistic is nearly identical to central or noncentral chi-squared distribution because the processing samples are large enough to be considered as infinite in GPS acquisition problem.It is also proved that the probability of false alarm,the probability of detection and the threshold are affected largely when the hypothesis testing refers to the full pseudorandom noise(PRN) code phase and Doppler frequency search space cells instead of each individual cell.The performance of the test statistic is also given with combining the noncoherent integration. 展开更多
关键词 global positioning system (GPS) signal detection parameter estimation generalized likelihood ratio test (GLRT) probability of false alarm probability of detection THRESHOLD
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A generalized tripartite scheme for splitting an arbitrary 2-qubit state with three 2-qubit partially entangled states and the Kraus measurement
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作者 XU ChunJie LIU YiMin +1 位作者 ZHANG Wen ZHANG ZhanJun 《Science China(Physics,Mechanics & Astronomy)》 SCIE EI CAS 2011年第2期281-287,共7页
We put forward a generalized tripartite scheme for splitting an arbitrary 2-qubit pure state with three 2-qubit non-maximally en-tangled states as quantum channels.The scheme for the first time incorporates the Kraus ... We put forward a generalized tripartite scheme for splitting an arbitrary 2-qubit pure state with three 2-qubit non-maximally en-tangled states as quantum channels.The scheme for the first time incorporates the Kraus measurement into quantum information splitting scheme.In contrast to the similar scheme using the same quantum channels and the ancilla-entangled measurement,our scheme is superior in terms of operation and complexity,success probability,resource consumption and effciency. 展开更多
关键词 quantum state splitting non-maximally entangled state Kraus operator
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Optimal Transportation for Generalized Lagrangian
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作者 Ji LI Jianlu ZHANG 《Chinese Annals of Mathematics,Series B》 SCIE CSCD 2017年第3期857-868,共12页
This paper deals with the optimal transportation for generalized Lagrangian L = L(x, u, t), and considers the following cost function: c(x, y) = inf x(0)=x x(1)=y u∈U∫0^1 L(x(s), u(x(s), s), s)ds, w... This paper deals with the optimal transportation for generalized Lagrangian L = L(x, u, t), and considers the following cost function: c(x, y) = inf x(0)=x x(1)=y u∈U∫0^1 L(x(s), u(x(s), s), s)ds, where U is a control set, and x satisfies the ordinary equation x(s) = f(x(s), u(x(s), s)).It is proved that under the condition that the initial measure μ0 is absolutely continuous w.r.t. the Lebesgue measure, the Monge problem has a solution, and the optimal transport map just walks along the characteristic curves of the corresponding Hamilton-Jacobi equation:Vt(t, x) + sup u∈U = 0,V(0, x) = Φ0(x). 展开更多
关键词 Optimal control Hamilton-Jacobi equation Characteristic curve Viscosity solution Optimal transportation Kantorovich pair Initial transport measure
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