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Robust Pole Assignment in Descriptor Second-order Dynamical Systems 被引量:3
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作者 DUAN Guang-Ren HUANG Ling 《自动化学报》 EI CSCD 北大核心 2007年第8期888-892,共5页
关键词 鲁棒性 描述符 动力系统 本征结构赋值 本征值 灵敏性 极点配置
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Regional pole assignment for uncertain delta-operator systems
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作者 ManLIU YuanweiJING SiyingZHANG 《控制理论与应用(英文版)》 EI 2004年第4期406-410,共5页
The pole assignment in a specified disk by state feedback for uncertain delta-operator systems is studied. By making use of algebra Riccati equations, a sufficient and necessary condition of pole assignment for a kind... The pole assignment in a specified disk by state feedback for uncertain delta-operator systems is studied. By making use of algebra Riccati equations, a sufficient and necessary condition of pole assignment for a kind of parameter uncertain delta-operator system in a specified disk by state feedback is presented. And the design method of state feedback controller is also developed. The proposed method can unify some previous related results of continuous and discrete time systems into the delta framework. The efficiency of the design method is illustrated by a numerical example. 展开更多
关键词 Delta-operator system Regional pole assignment UNCERTAINTY ROBUSTNESS Quadratic D stabilizability
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A Pole Assignment Design Method of Process Control System for Tubular Heat Exchanger
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作者 周清泉 《Chinese Quarterly Journal of Mathematics》 CSCD 1992年第4期13-19,共7页
This Paper has first studied the simplified model of tubular heat exchanger which is widely used in the industry and other field.On the basis of reference 2,a new pole assignment design method of pro-cess control syst... This Paper has first studied the simplified model of tubular heat exchanger which is widely used in the industry and other field.On the basis of reference 2,a new pole assignment design method of pro-cess control system with derivative control action is found.For the above system,the method and the for-mation which calculate the feedback matrix K and gain matrix L is given,and the simulation of the system is made. 展开更多
关键词 tubular heat exchanger process control system pole assignment design method feedback matrix Gain matrix
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具有POLE致病性突变子宫内膜癌的临床病理及分子特征分析
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作者 蔡宇梦 周杨 +4 位作者 汪昊 庞钧译 吴焕文 师晓华 梁智勇 《诊断病理学杂志》 2024年第4期282-286,322,共6页
目的探讨具有POLE致病性突变子宫内膜癌(EC)的临床病理及分子特征。方法选取179例EC患者,根据POLE基因突变、错配修复(MMR)蛋白表达及p53表达/TP53突变进行分子分型,分析POLE mut型EC的临床病理及分子特征。结果POLE mut20例,MMRd 48例,... 目的探讨具有POLE致病性突变子宫内膜癌(EC)的临床病理及分子特征。方法选取179例EC患者,根据POLE基因突变、错配修复(MMR)蛋白表达及p53表达/TP53突变进行分子分型,分析POLE mut型EC的临床病理及分子特征。结果POLE mut20例,MMRd 48例,NSMP 90例,p53 abn 21例。POLE mut EC多为FIGOⅠ期(17/20),中-低分化子宫内膜样癌(EEC)(13/20)、局限于内膜/浅肌层(17/20)、肿瘤浸润性淋巴细胞(TILs)显著(17/20)、无/局灶(LVSI)(18/20)、无淋巴结转移(19/20)。4个亚组间临床病理特征的差异均有统计学意义(P<0.05)。POLE mut型预后最好,具有多重分类特征的病例预后更接近POLE mut型。结论POLE mut EC提示着较高的组织学分级,较早的临床分期及较好的预后;POLE mut可继发dMMR/MSI-H表型及p53/TP53异常,应归类为POLE mut型。 展开更多
关键词 子宫内膜癌 分子分型 pole 错配修复缺陷 TP53
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Robust Pole Assignment of Digital Control System with Output Multirate Sampled
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作者 曾怡达 张友刚 何三波 《Journal of Modern Transportation》 2000年第2期162-168,共7页
Multirate digital control system is a periodically time-variant (PTV) system in its essence. It bas many' super capability', such as obtaining arbitrarily-large gain- margin, simultaneous stabilization, strong... Multirate digital control system is a periodically time-variant (PTV) system in its essence. It bas many' super capability', such as obtaining arbitrarily-large gain- margin, simultaneous stabilization, strong stabilization, decentralized control, etc. Utilizing freedom aroused from the multirate sampling of system output, this paper assigns poles of the closedloop system robustly, and so improves the resistance of the system to perturbation. 展开更多
关键词 digital control system multirate sampling robust pole assignmeP
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Development of SNP parentage assignment techniques in the yellowfin seabream Acanthopagrus latus
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作者 Hongbo Zhao Liangmin Huang +3 位作者 Jing Zhang Songyuan You Qingmin Zeng Xiande Liu 《Acta Oceanologica Sinica》 SCIE CAS CSCD 2024年第2期151-155,共5页
Acanthopagrus latus is an essential aquaculture species on the south coast of China.However,there is a lack of systematic breeding of A.latus,which considerably limits the sustainable development of A.latus.As a resul... Acanthopagrus latus is an essential aquaculture species on the south coast of China.However,there is a lack of systematic breeding of A.latus,which considerably limits the sustainable development of A.latus.As a result,genetic improvements are urgently needed to breed new strains of A.latus with rapid growth and strong resistance to disease.During selective breeding,it is necessary to estimate the genetic parameters of the target trait,which in turn depends on an accurate disentangled pedigree for the selective population.Therefore,it is necessary to establish the parentage assignment technique for A.latus.In this study,95 individuals selected from their parents and their 14 families were used as experimental material.SNPs were developed by genome resequencing,and highly polymorphic SNPs were screened on the basis of optimized filtering parameters.A total of 14392738 SNPs were discovered and 205 SNPs were selected for parentage assignment using the CERVUS software.In the model where the gender of the parents is known,the assignment success rate is 98.61%for the male parent,97.22%for the female parent,and 95.83%for the parent pair.In the model where the gender of the parents is unknown,the assignment success rate is 100%for a single parent and 90.28%for the parent pair.The results of this study were expected to serve as a reference for the breeding of new varieties of A.latus. 展开更多
关键词 Acanthopagrus latus parentage assignment SNP Genome re-sequencing
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Channel assignment and power allocation for throughput improvement with PPO in B5G heterogeneous edge networks
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作者 Xiaoming He Yingchi Mao +3 位作者 Yinqiu Liu Ping Ping Yan Hong Han Hu 《Digital Communications and Networks》 SCIE CSCD 2024年第1期109-116,共8页
In Beyond the Fifth Generation(B5G)heterogeneous edge networks,numerous users are multiplexed on a channel or served on the same frequency resource block,in which case the transmitter applies coding and the receiver u... In Beyond the Fifth Generation(B5G)heterogeneous edge networks,numerous users are multiplexed on a channel or served on the same frequency resource block,in which case the transmitter applies coding and the receiver uses interference cancellation.Unfortunately,uncoordinated radio resource allocation can reduce system throughput and lead to user inequity,for this reason,in this paper,channel allocation and power allocation problems are formulated to maximize the system sum rate and minimum user achievable rate.Since the construction model is non-convex and the response variables are high-dimensional,a distributed Deep Reinforcement Learning(DRL)framework called distributed Proximal Policy Optimization(PPO)is proposed to allocate or assign resources.Specifically,several simulated agents are trained in a heterogeneous environment to find robust behaviors that perform well in channel assignment and power allocation.Moreover,agents in the collection stage slow down,which hinders the learning of other agents.Therefore,a preemption strategy is further proposed in this paper to optimize the distributed PPO,form DP-PPO and successfully mitigate the straggler problem.The experimental results show that our mechanism named DP-PPO improves the performance over other DRL methods. 展开更多
关键词 B5G Heterogeneous edge networks PPO Channel assignment Power allocation THROUGHPUT
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A self-organization formation configuration based assignment probability and collision detection
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作者 SONG Wei WANG Tong +1 位作者 YANG Guangxin ZHANG Peng 《Journal of Systems Engineering and Electronics》 SCIE EI CSCD 2024年第1期222-232,共11页
The formation control of multiple unmanned aerial vehicles(multi-UAVs)has always been a research hotspot.Based on the straight line trajectory,a multi-UAVs target point assignment algorithm based on the assignment pro... The formation control of multiple unmanned aerial vehicles(multi-UAVs)has always been a research hotspot.Based on the straight line trajectory,a multi-UAVs target point assignment algorithm based on the assignment probability is proposed to achieve the shortest overall formation path of multi-UAVs with low complexity and reduce the energy consumption.In order to avoid the collision between UAVs in the formation process,the concept of safety ball is introduced,and the collision detection based on continuous motion of two time slots and the lane occupation detection after motion is proposed to avoid collision between UAVs.Based on the idea of game theory,a method of UAV motion form setting based on the maximization of interests is proposed,including the maximization of self-interest and the maximization of formation interest is proposed,so that multi-UAVs can complete the formation task quickly and reasonably with the linear trajectory assigned in advance.Finally,through simulation verification,the multi-UAVs target assignment algorithm based on the assignment probability proposed in this paper can effectively reduce the total path length,and the UAV motion selection method based on the maximization interests can effectively complete the task formation. 展开更多
关键词 straight line trajectory assignment probability collision detection lane occupation detection maximization of interests
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Reinforcement Learning Based Quantization Strategy Optimal Assignment Algorithm for Mixed Precision
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作者 Yuejiao Wang Zhong Ma +2 位作者 Chaojie Yang Yu Yang Lu Wei 《Computers, Materials & Continua》 SCIE EI 2024年第4期819-836,共18页
The quantization algorithm compresses the original network by reducing the numerical bit width of the model,which improves the computation speed. Because different layers have different redundancy and sensitivity to d... The quantization algorithm compresses the original network by reducing the numerical bit width of the model,which improves the computation speed. Because different layers have different redundancy and sensitivity to databit width. Reducing the data bit width will result in a loss of accuracy. Therefore, it is difficult to determinethe optimal bit width for different parts of the network with guaranteed accuracy. Mixed precision quantizationcan effectively reduce the amount of computation while keeping the model accuracy basically unchanged. In thispaper, a hardware-aware mixed precision quantization strategy optimal assignment algorithm adapted to low bitwidth is proposed, and reinforcement learning is used to automatically predict the mixed precision that meets theconstraints of hardware resources. In the state-space design, the standard deviation of weights is used to measurethe distribution difference of data, the execution speed feedback of simulated neural network accelerator inferenceis used as the environment to limit the action space of the agent, and the accuracy of the quantization model afterretraining is used as the reward function to guide the agent to carry out deep reinforcement learning training. Theexperimental results show that the proposed method obtains a suitable model layer-by-layer quantization strategyunder the condition that the computational resources are satisfied, and themodel accuracy is effectively improved.The proposed method has strong intelligence and certain universality and has strong application potential in thefield of mixed precision quantization and embedded neural network model deployment. 展开更多
关键词 Mixed precision quantization quantization strategy optimal assignment reinforcement learning neural network model deployment
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Effectiveness of Chromated Copper Arsenate against Deteriorating Agents of Eucalyptus Poles and Posts in Four Eco-Regions in Kenya
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作者 Miriam Gathogo Evanson Omuse George Muthike 《Open Journal of Forestry》 2024年第3期281-296,共16页
Previous studies done elsewhere have shown that Eucalyptus poles treated with chromated copper arsenate (CCA) can last over 30 years. Kenya is exceptional because in some eco-regions, the Eucalyptus poles’ life span ... Previous studies done elsewhere have shown that Eucalyptus poles treated with chromated copper arsenate (CCA) can last over 30 years. Kenya is exceptional because in some eco-regions, the Eucalyptus poles’ life span has greatly reduced to 5 years. The current study was designed to evaluate wood deteriorating agents of CCA-treated Eucalyptus poles and variability in four eco-regions of Kenya, namely, dryland, coastal, highland and humid lake. A total of 360 Eucalyptus pole samples were used for this experiment. Three CCA treatments were used to treat transmission poles at 20 kg/cm3 fencing posts samples at 6 kg/cm3, and a control group. Results indicated that termites and wood-decay fungi attacks caused wood deterioration in the four eco-regions. The proportion of power transmission pole degradation by wood deteriorating agents varied across eco-regions, between treatments and control and between time after treatments. Dryland eco-regions had the highest termite-related degradation (41.82%) while wood-decay fungi attack was highest in the highland eco-regions (9.20%). Samples treated with 6 kg/cm3 recorded the lowest level of wood deterioration, manifested by minimal superficial termite and wood-decay fungi attack. Samples treated with 20 kg/cm3 were characterized by moderate termite and wood-decay fungi attacks observed around the heartwood region, unlike sapwood. This study concluded that the deterioration of Eucalyptus CCA-treated poles is a question of climatic variability and hence, to increase the poles’ lifespan, CCA treatment should be tailored according to the characteristics of the ecoregion of use. Further investigations will inform the diversity of termites and decay-fungi across different eco-regions. 展开更多
关键词 Wood Deteriorating Agents CCA Transmission poles Wood-Decay Fungi
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POLE突变在肿瘤发生发展中的作用 被引量:6
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作者 黄茜 张声 《临床与病理杂志》 2015年第12期2173-2179,共7页
POLE为DNA聚合酶的催化亚基,具有5'3'DNA聚合酶活性和3'→5'核酸外切酶活性,对DNA复制和校正具有重要作用。POLE突变将引起校正功能缺失,可能导致肿瘤发生。近年来,TCGA在多种肿瘤中检出POLE突变,POLE突变的肿瘤以其独... POLE为DNA聚合酶的催化亚基,具有5'3'DNA聚合酶活性和3'→5'核酸外切酶活性,对DNA复制和校正具有重要作用。POLE突变将引起校正功能缺失,可能导致肿瘤发生。近年来,TCGA在多种肿瘤中检出POLE突变,POLE突变的肿瘤以其独特超强突变分子表型及良好的预后成为近期研究热点。本文综述POLE的结构、功能及其突变在肿瘤发生发展中的作用的研究进展。 展开更多
关键词 pole 肿瘤 预后
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South Pole温度风速廓线的统计分析 被引量:1
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作者 汪平 吴晓庆 《大气与环境光学学报》 CAS 2013年第5期334-343,共10页
利用2008年South Pole的探空资料,通过大气温度和风速廓线,确定了South Pole地区冬季(6,7,8月)和夏季(12,1,2月)的大气边界层结构、边界层和对流层顶的高度。对近地面的温度、水汽压、风速和风向进行了统计分析。结果表明,South Pole大... 利用2008年South Pole的探空资料,通过大气温度和风速廓线,确定了South Pole地区冬季(6,7,8月)和夏季(12,1,2月)的大气边界层结构、边界层和对流层顶的高度。对近地面的温度、水汽压、风速和风向进行了统计分析。结果表明,South Pole大气边界层大多时候为稳定型,但在夏季也存在不稳定的情况,尤其在1月份较多;夏季夜晚的边界层平均高度为389 m,比白天的304 m大,冬季夜晚的边界层平均高度为591 m,大于夏季夜晚;夏季白天对流层顶平均高度比夜晚略大,分别为6172 m和5770m。South Pole高层大气理查森数的倒数基本都小于4,发生湍流的可能性很小。 展开更多
关键词 SOUTH pole 温度风速廓线 边界层顶 对流层顶
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~1H and ^(13)C NMR Assignments for Amlodipine and Risperidone
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作者 杨春晖 李勤 +2 位作者 刘雪辉 赵兴凯 崔育新 《Journal of Chinese Pharmaceutical Sciences》 CAS 2004年第1期49-52,共4页
Aim To investigate the NMR spectroscopy of amlodipine and risperidone.Methods 1D NMR and 2D NMR experimental techniques of gCOSY, gHSQC and gHMBC were wsed. Results Theassignments of the ~1H and ^(13) C NMR data for t... Aim To investigate the NMR spectroscopy of amlodipine and risperidone.Methods 1D NMR and 2D NMR experimental techniques of gCOSY, gHSQC and gHMBC were wsed. Results Theassignments of the ~1H and ^(13) C NMR data for the two drugs were performed and confirmed by theevidence of J_(HF) and J_(CF). Conclusion The structures of amlodipine and risperidone wereconfirmed by careful analysis of regular 1D and 2D NMR spectroscopy. 展开更多
关键词 NMR assignment fluorine coupling AMLODIPINE RISPERIDONE
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Inspires effective alternatives to backpropagation:predictive coding helps understand and build learning
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作者 Zhenghua Xu Miao Yu Yuhang Song 《Neural Regeneration Research》 SCIE CAS 2025年第11期3215-3216,共2页
Artificial neural networks are capable of machine learning by simulating the hiera rchical structure of the human brain.To enable learning by brain and machine,it is essential to accurately identify and correct the pr... Artificial neural networks are capable of machine learning by simulating the hiera rchical structure of the human brain.To enable learning by brain and machine,it is essential to accurately identify and correct the prediction errors,referred to as credit assignment(Lillicrap et al.,2020).It is critical to develop artificial intelligence by understanding how the brain deals with credit assignment in neuroscience. 展开更多
关键词 assignment LEARNING enable
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A Discrete-Time Stochastic Traffic Assignment Model
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作者 王炜 朱中 曲大义 《Journal of Southeast University(English Edition)》 EI CAS 2001年第1期13-17,共5页
A discrete time stochastic traffic assignment model is proposed. The model provides a discrete time description of the variations of flows on a road network during a day or a peak period. The congestion effect at li... A discrete time stochastic traffic assignment model is proposed. The model provides a discrete time description of the variations of flows on a road network during a day or a peak period. The congestion effect at links and link junctions are taken into account. The first in first out principle is enforced on all links at all periods of the day. A stochastic user equilibrium assignment is achieved when the tripmaker is unable to find better travel alternatives. A computational procedure is also presented. 展开更多
关键词 stochastic user equilibrium traffic assignment discrete time traffic assignment
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Cross Point Assignment Algorithm Under Consideration of Very Long Nets
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作者 张轶谦 谢民 +1 位作者 洪先龙 蔡懿慈 《Journal of Semiconductors》 EI CAS CSCD 北大核心 2002年第6期582-588,共7页
A cross point assignment algorithm is proposed under consideration of very long nets (LCPA).It is to consider not only the cost of connection between cross points and pins and the exclusive cost among cross points on ... A cross point assignment algorithm is proposed under consideration of very long nets (LCPA).It is to consider not only the cost of connection between cross points and pins and the exclusive cost among cross points on the boundary of a global routing cell,but also the cost of displacement among cross points of the same net.The experiment results show that the quality and speed in the following detailed routing are improved obviously,especially for very long nets. 展开更多
关键词 cross point assignment layout VLSI
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ACS-based resource assignment and task scheduling in grid
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作者 祁超 张璟 李军怀 《Journal of Southeast University(English Edition)》 EI CAS 2007年第3期451-454,共4页
To solve the deadlock problem of tasks that the interdependence between tasks fails to consider during the course of resource assignment and task scheduling based on the heuristics algorithm, an improved ant colony sy... To solve the deadlock problem of tasks that the interdependence between tasks fails to consider during the course of resource assignment and task scheduling based on the heuristics algorithm, an improved ant colony system (ACS) based algorithm is proposed. First, how to map the resource assignment and task scheduling (RATS) problem into the optimization selection problem of task resource assignment graph (TRAG) and to add the semaphore mechanism in the optimal TRAG to solve deadlocks are explained. Secondly, how to utilize the grid pheromone system model to realize the algorithm based on ACS is explicated. This refers to the construction of TRAG by the random selection of appropriate resources for each task by the user agent and the optimization of TRAG through the positive feedback and distributed parallel computing mechanism of the ACS. Simulation results show that the proposed algorithm is effective and efficient in solving the deadlock problem. 展开更多
关键词 GRID resource assignment task scheduling ant colony system (ACS) task resource assignment graph (TRAG) SEMAPHORE
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Traffic-aware static channel assignment algorithm in wireless mesh networks
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作者 陶军 柳津 +1 位作者 邵碧锐 刘智杰 《Journal of Southeast University(English Edition)》 EI CAS 2011年第4期370-374,共5页
A channel assignment algorithm with awareness of link traffic is proposed in multi-radio multi-channel wireless mesh networks. First, the physical interference model based on the signal-to-interference-plus-noise rati... A channel assignment algorithm with awareness of link traffic is proposed in multi-radio multi-channel wireless mesh networks. First, the physical interference model based on the signal-to-interference-plus-noise ratio and successful transmission condition is described. The model is more suitable for a wireless communication environment than other existing models. Secondly, a pure integer quadratic programming (PIQP) model is used to solve the channel assignment problem and improve the capacity of wireless mesh networks. Consequently, a traffic- aware static channel assignment algorithm(TASC) is designed. The algorithm adopts some network parameters, including the network connectivity, the limitation of the number of radios and the successful transmission conditions in wireless communications. The TASC algorithm can diminish network interference and increase the efficiency of channel assignment while keeping the connectivity of the network. Finally, the feasibility and effectivity of the channel assignment solution are illustrated by the simulation results. Compared witb similar algorithms, the proposed algorithm can increase the capacity of WMNs. 展开更多
关键词 multi-radio multi-channel wireless mesh network static channel assignment traffic-aware
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Rugged Resonant Pole and Its Applications in Soft-Switching Converter
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作者 肖岚 严仰光 《Journal of Southeast University(English Edition)》 EI CAS 2002年第3期225-232,共8页
The soft switching operation principle and operation performance of rugged resonant pole (RRP) is given. The applications of RRP in soft switching DC DC converter and soft switching inverter are discussed in detail. R... The soft switching operation principle and operation performance of rugged resonant pole (RRP) is given. The applications of RRP in soft switching DC DC converter and soft switching inverter are discussed in detail. RRP can constitute buck boost soft switching DC DC converter and isolated soft switching DC DC converter with the automatic limitation performance of output power. Partial series resonant DC DC converter with RRP can realize the zero voltage/zero current switching of power devices. RR... 展开更多
关键词 rugged resonant pole soft switching DC DC converter INVERTER
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Direct computing methods for turn flows in traffic assignment
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作者 任刚 王炜 《Journal of Southeast University(English Edition)》 EI CAS 2005年第2期225-228,共4页
Two methods based on a slight modification of the regular traffic assignmentalgorithms are proposed to directly compute turn flows instead of estimating them from link flows orobtaining them by expanding the networks.... Two methods based on a slight modification of the regular traffic assignmentalgorithms are proposed to directly compute turn flows instead of estimating them from link flows orobtaining them by expanding the networks. The first one is designed on the path-turn incidencerelationship, and it is similar to the computational procedure of link flows. It applies to thetraffic assignment algorithms that can provide detailed path structures. The second utilizes thelink-turn incidence relationship and the conservation of flow on links, a law deriving from thisrelationship. It is actually an improved version of Dial's logit assignment algorithm. The proposedapproaches can avoid the shortcomings both of the estimation methods, e. g. Furness's model andFrator's model, and of the network-expanding method in precision, stability and computation scale.Finally, they are validated by numerical examples. 展开更多
关键词 turn flow traffic assignment Dial's algorithm directly computing method
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