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售货机升降系统S型速度控制策略
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作者 冯高明 邱文仙 金明磊 《电子科技》 2024年第5期54-61,共8页
在传统三闭环控制方式下,售货机升降接货系统易因启停过程中加速度突变产生冲击,导致系统运行不平稳。针对这一问题,文中对传统升降系统加减速控制策略进行改进,加入前馈和微分负反馈,提出一种S型速度曲线控制算法。根据路径规划判别条... 在传统三闭环控制方式下,售货机升降接货系统易因启停过程中加速度突变产生冲击,导致系统运行不平稳。针对这一问题,文中对传统升降系统加减速控制策略进行改进,加入前馈和微分负反馈,提出一种S型速度曲线控制算法。根据路径规划判别条件将S型速度曲线分为七段式、六段式和四段式3种,并给出各路径约束条件下的参数求解方法和具体执行流程。将该算法运用到升降控制系统中进行仿真和实际工况测试,实验结果表明,与传统三闭环控制相比,文中所提控制策略可以提高售货机升降系统运行的平稳性,减小冲击,使速度曲线更加柔和,并能够保持较好的跟踪性能。 展开更多
关键词 加减速控制 s型速度曲线 升降系统 加速度突变 冲击 售货机 控制策略 跟踪性能
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Dynamic analysis of slab track on multi-layered transversely isotropic saturated soils subjected to train loads 被引量:5
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作者 Zhan Yongxiang Yao Hailin +1 位作者 Lu Zheng Yu Dongming 《Earthquake Engineering and Engineering Vibration》 SCIE EI CSCD 2014年第4期731-740,共10页
The dynamic responses of a slab track on transversely isotropic saturated soils subjected to moving train loads are investigated by a semi-analytical approach. The track model is described as an upper Euler beam to si... The dynamic responses of a slab track on transversely isotropic saturated soils subjected to moving train loads are investigated by a semi-analytical approach. The track model is described as an upper Euler beam to simulate the rails and a lower Euler beam to model the slab. Rail pads between the rails and slab are represented by a continuous layer of springs and dashpots. A series of point loads are formulated to describe the moving train loads. The governing equations of track-ground systems are solved using the double Fourier transform, and the dynamic responses in the time domain are obtained by the inverse Fourier transform. The results show that a train load with high velocity will generate a larger response in transversely isotropic saturated soil than the lower velocity load, and special attention should be paid on the pore pressure in the vicinity of the ground surface. The anisotropic parameters of a surface soil layer will have greater influence on the displacement and excess pore water pressure than those of the subsoil layer. The traditional design method taking ground soil as homogeneous isotropic soil is unsafe for the case of RE 〈 1 and RG 〈 1, so a transversely isotropic foundation model is of great significance to the design for high train velocities. 展开更多
关键词 slab track transversely isotropic saturated soil Biot's theory train load dynamic response
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Automatic target tracking on multi-resolution terrain 被引量:2
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作者 WAN Ming ZHANG Wei +1 位作者 MURRAY Marie O. KAUFMAN Ariet 《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》 SCIE EI CAS CSCD 2006年第7期1275-1281,共7页
We propose a high-performance path planning algorithm for automatic target tracking in the applications of real-time simulation and visualization of large-scale terrain datasets, with a large number of moving objects ... We propose a high-performance path planning algorithm for automatic target tracking in the applications of real-time simulation and visualization of large-scale terrain datasets, with a large number of moving objects (such as vehicles) tracking multiple moving targets. By using a modified Dijkstra's algorithm, an optimal path between each vehicle-target pair over a weighted grid-presented terrain is computed and updated to eliminate the problem of local minima and losing of tracking. Then, a dynamic path re-planning strategy using multi-resolution representation of a dynamic updating region is proposed to achieve high-performance by trading-off precision for efficiency, while guaranteeing accuracy. Primary experimental results showed that our algorithm successfully achieved l0 to 96 frames per second interactive path-replanning rates during a terrain simulation scenario with 10 to 100 vehicles and multiple moving targets. 展开更多
关键词 Target tracking Path planning Dijkstra's algorithm Voxel-based modeling Multi-resolution terrain Real-timevisualization and simulation
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Global Inverse Optimal Tracking Control of Underactuated Omni-directional Intelligent Navigators (ODINs) 被引量:2
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作者 Khac Duc Do 《Journal of Marine Science and Application》 CSCD 2015年第1期1-13,共13页
This paper presents a design of optimal controllers with respect to a meaningful cost function to force an underactuated omni-directional intelligent navigator (ODIN) under unknown constant environmental loads to tr... This paper presents a design of optimal controllers with respect to a meaningful cost function to force an underactuated omni-directional intelligent navigator (ODIN) under unknown constant environmental loads to track a reference trajectory in two-dimensional space. Motivated by the vehicle's steering practice, the yaw angle regarded as a virtual control plus the surge thrust force are used to force the position of the vehicle to globally track its reference trajectory. The control design is based on several recent results developed for inverse optimal control and stability analysis of nonlinear systems, a new design of bounded disturbance observers, and backstepping and Lyapunov's direct methods. Both state- and output-feedback control designs are addressed. Simulations are included to illustrate the effectiveness of the proposed results. 展开更多
关键词 inverse optimality optimal controller global tracking underactuated omni-directional intelligent navigator (ODIN) Lyapunov's direct method backstepping method
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Statistic PID Tracking Control for Non-Gaussian Stochastic Systems Based on T-S Fuzzy Model 被引量:3
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作者 Yang Yi Hong Shen Lei Gu 《International Journal of Automation and computing》 EI 2009年第1期81-87,共7页
A new robust proportional-integral-derivative (PID) tracking control framework is considered for stochastic systems with non-Gaussian variable based on B-spline neural network approximation and T-S fuzzy model ident... A new robust proportional-integral-derivative (PID) tracking control framework is considered for stochastic systems with non-Gaussian variable based on B-spline neural network approximation and T-S fuzzy model identification. The tracked object is the statistical information of a given target probability density function (PDF), rather than a deterministic signal. Following B-spline approximation to the integrated performance function, the concerned problem is transferred into the tracking of given weights. Different from the previous related works, the time delay T-S fuzzy models with the exogenous disturbances are applied to identify the nonlinear weighting dynamics. Meanwhile, the generalized PID controller structure and the improved convex linear matrix inequalities (LMI) algorithms are proposed to fulfil the tracking problem. Furthermore, in order to enhance the robust performance, the peak-to-peak measure index is applied to optimize the tracking performance. Simulations are given to demonstrate the efficiency of the proposed approach. 展开更多
关键词 Non-Gaussian systems probability density function statistic tracking control T-s fuzzy model proportional-integralderivative control.
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MANEUVERING TARGET TRACKING USING FUZZY COMPENSATOR
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作者 肖昌美 宋申民 +1 位作者 张福恩 尔联结 《Chinese Journal of Aeronautics》 SCIE EI CSCD 1998年第4期26-33,共8页
A new approach is provided to estimate the state of arbitrarily maneuvering target. In this approach a fuzzy compensator is used to tackle the uncertainty which results from the targets arbitrarily maneuvering. To des... A new approach is provided to estimate the state of arbitrarily maneuvering target. In this approach a fuzzy compensator is used to tackle the uncertainty which results from the targets arbitrarily maneuvering. To design the observer of the nonlinear system, the fuzzy T S model and the receding horizon control strategy are employed. Besides, the design depends on tracking the output error of the model. Compared with the technique used in other articles, the errors between the first estimated value and the true state value of the estimated variable are not strictly required. Numerical simulating results show that the proposed approach can estimate the states of the random maneuvering targets on line so as to obtain the exact tracking of the target. 展开更多
关键词 target tracking fuzzy T s model fuzzy compensator
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A Report of 10 Cases of Parkinson’s Disease Cured by Xifengzhizhan Pills and Xifengzhizhan Capsules
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作者 Weifan Wang 《Advances in Parkinson's Disease》 2019年第2期9-17,共9页
Parkinson’s Disease (PD) is a chronic progressive degeneration disease of the central nervous system of extrapyramidal system. The main pathological changes are the degeneration of the substantia nigra striatum, lack... Parkinson’s Disease (PD) is a chronic progressive degeneration disease of the central nervous system of extrapyramidal system. The main pathological changes are the degeneration of the substantia nigra striatum, lack of dopamine in the brain, causing clinical performance: static tremor, muscle rigidity, slow movement and abnormal posture. It is one of the worldwide medical problems;at present, modern medicine thinks that PD is an incurable and permanent disease. However, in my long-term clinical work, I have cured many cases of PD patients by using Xifengzhizhan pills and Xifenzhizhan capsules, and I have found and proved that Chinese Medicine can cure PD. 展开更多
关键词 Parkinson’s DIsEAsE Chinese Medicine Cure Parkinson’s DIsEAsE Parkinson’s DIsEAsE Case REPORT Xifengzhizhan pills Xifengzhizhan CAPsULEs
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Assessment of LV Function in Children with Wilson’s Disease: Speckle Tracking Imaging Study
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作者 Mahmoud Kamel Ahmed Mohamed Yahia +1 位作者 Rehab Yaseen Morad Beshay 《World Journal of Cardiovascular Diseases》 2019年第3期202-211,共10页
Background and Objective: Wilson’s disease is a genetic disorder of copper metabolism that affects liver and other organs including heart. In early stages of myocardial affection, the left ventricle (LV) appears appa... Background and Objective: Wilson’s disease is a genetic disorder of copper metabolism that affects liver and other organs including heart. In early stages of myocardial affection, the left ventricle (LV) appears apparently normal when evaluated by traditional two-dimensional (2D) echocardiography. The aim of this study was to detect subclinical LV dysfunction in children with Wilson’s disease using 2D speckle tracking echocardiography. Patients and Methods: Twenty children with Wilson’s disease were compared with age- and sex-matched 20 healthy children. All subjects were evaluated by traditional 2D echocardiography and speckle tracking echocardiography. Results: There were no significant differences between patients and controls regarding conventional echo parameters except for lower E mitral flow and E' annular septal peak velocity in patient group. The regional peak longitudinal strain of apical 4 chamber view was -17.8% ± 4.2% in patients and -20.1% ± 2.3 % in control subjects (P = 0.043), and for apical 2 chambers view, it was -20.1%± 3.6% in patients and -22.6% ± 3.4% in control subjects (P = 0.034) and it was -18% ± 3.5% in patients and -20.5% ± 3.2% in control subjects (P = 0.025) in apical long axis view. The global peak longitudinal strain was also lower in patients than control group (18.3% ± 3.2%, and 20.85% ± 2.4%) respectively (P = 0.014). There were no significant differences between both groups regarding circumferential and radial strains (P > 0.05). Conclusions: Despite apparently normal LV systolic function, the children with Wilson’s disease demonstrated significantly lower peak longitudinal strain as an indicator for early affection of LV systolic function. 展开更多
关键词 Wilson’s DIsEAsE sPECKLE tracking ECHOCARDIOGRAPHY
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China's Economy Approaching the World Economic Track
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作者 Liu Rixin Research-fellow of Economic Research Centre of State Planning Commission 《China's Foreign Trade》 1994年第6期3-5,共3页
The year 1993 was the fifteenth of China’s reform and opening to the outside. Its economy sustained double digit growth for two years running. Last year, domestic GNP was RMB3,138 billion, a 13.4 percent increase com... The year 1993 was the fifteenth of China’s reform and opening to the outside. Its economy sustained double digit growth for two years running. Last year, domestic GNP was RMB3,138 billion, a 13.4 percent increase compared with the previous year’s 13.2 percent. 展开更多
关键词 World China’s Economy Approaching the World Economic track will GNP
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Exploring the mechanism of Huangjing pill in the treatment of Alzheimer’s disease based on network pharmacology and molecular docking
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作者 Shuang-Hui Shi Meng-Lin Wang +7 位作者 Xiao-Tong Wei Si-Yuan Ma Yu-Feng Hu Jing-Qiu Zhang Hui-Nan Wang Meng-Yu Chen Qian-Qian Liu Ying-Zi Wang 《TMR Modern Herbal Medicine》 CAS 2023年第1期41-47,共7页
Objective To reveal the mechanism of Huangjing pill in treating Alzheimer’s disease(AD)based on network pharmacology and molecular docking technology.Methods We obtained the active ingredients and targets of Huangjin... Objective To reveal the mechanism of Huangjing pill in treating Alzheimer’s disease(AD)based on network pharmacology and molecular docking technology.Methods We obtained the active ingredients and targets of Huangjing pill through Traditional Chinese Medicine Systems Pharmacology Database and Analysis Platform,and supplemented the effective components by consulting literature and predicted targets through the PharmMapper database.We used DrugBank,the GeneCards,the TTD,and the OMIM database to collect targets of AD.The Venn diagram was drawn and the key targets of Huangjing pill in the treatment of AD were obtained by Venny 2.1 platform.The Cytoscape 3.8.1 software was used to construct a network diagram of“drugs-active ingredients-key targets-disease”.The protein-protein interaction(PPI)network diagram was constructed through the STRING 11.5 database.DAVID database was used for Gene Ontology function and Kyoto Encyclopedia of Genes and Genomes pathway enrichment analysis.AutoDock Vina1.1.2 software was used for molecular docking of the active components and core targets,and PyMOL 1.7.2.1 software was used for visual processing.Results After screening,we obtained 13 active ingredients and 116 targets of Huangjing Pill,1438 related targets for AD,and 75 common targets.566 items by GO enrichment analysis and 149 items related to KEGG pathway enrichment were obtained.Molecular docking results showed that there is a strong affinity between the key active ingredients and the core targets.Conclusion This study revealed that Huangjing pill could treat AD through multiple components,multiple targets and multiple pathways. 展开更多
关键词 Huangjing pill Alzheimer’s disease Network pharmacology Molecule docking
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固定翼UAV路径跟踪的全局稳定积分滑模S面控制
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作者 陈鹏云 张国兵 +2 位作者 李佳成 关通 石上瑶 《计算机工程与应用》 CSCD 北大核心 2024年第13期353-360,共8页
针对固定翼无人机的三维路径跟踪控制问题,设计了一种基于全局稳定积分滑模S面模型的内外环控制器。控制器外环采用全局稳定积分滑模控制,内环采用S面控制。设计控制器外环的全局稳定积分滑模控制律,并采用Lyapunov理论证明所设计控制... 针对固定翼无人机的三维路径跟踪控制问题,设计了一种基于全局稳定积分滑模S面模型的内外环控制器。控制器外环采用全局稳定积分滑模控制,内环采用S面控制。设计控制器外环的全局稳定积分滑模控制律,并采用Lyapunov理论证明所设计控制律的稳定性。对内环的指令信号设计S面控制器,考虑到S面控制器中求导的复杂性,引入二阶微分器,解决内环中导数存在积分爆炸的问题。半物理仿真试验结果表明,提出的控制器能精确跟踪期望路径,具有良好的控制性能和抗干扰性能。 展开更多
关键词 无人机 全局稳定 路径跟踪 运动控制 滑模控制 s面控制
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Robust Optimal Output Tracking Control of A Midwater Trawl System Based on T-S Fuzzy Nonlinear Model
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作者 周华 陈英龙 杨华勇 《China Ocean Engineering》 SCIE EI CSCD 2013年第1期1-16,共16页
A robust optimal output tracking control method for a midwater trawl system is investigated based on T-S fuzzy nonlinear model. A simplified nonlinear mathematical model is first employed to represent a midwater trawl... A robust optimal output tracking control method for a midwater trawl system is investigated based on T-S fuzzy nonlinear model. A simplified nonlinear mathematical model is first employed to represent a midwater trawl system, and then a T-S fuzzy model is adopted to approximate the nonlinear system. Since the strong nonlinearities and the external disturbance of the trawling system, a mixed H2/H∞ fuzzy output tracking control strategy via T-S fuzzy system is proposed to regulate the trawl depth to follow a desired trajectory. The trawl depth can be regulated by adjusting the winch velocity automatically and the tracking error can be minimized according to the robust optimal criterion. In order to validate the proposed control method, a computer simulation is conducted. The simulation results indicate that the proposed fuzzy robust optimal controller make the trawl net rapidly follow the desired trajectory under the model uncertainties and the extemal disturbance caused by wave and current. 展开更多
关键词 trawl system output tracking robust optimal control Takagi-sugeno (T-s fuzzy systems nonlinear systems
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Structural Analysis and Improved Design of the Gearbox Casing of a Certain Type of Tracked Vehicle
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作者 ZHANG Xue-sheng JIA Xiao-ping CHEN Ya-ning YU Kui-long 《International Journal of Plant Engineering and Management》 2011年第4期200-207,共8页
Loads on a gearbox casing of a certain type of tracked vehicle were calculated according to the engine's full load characteristic curve and the worst load condition where the gearbox operated while the tracked vehicl... Loads on a gearbox casing of a certain type of tracked vehicle were calculated according to the engine's full load characteristic curve and the worst load condition where the gearbox operated while the tracked vehicle was running, and then stiffness and strength of the casing were analyzed by means of Patran/Nastran software. After a- nalysis, it was found that the casing satisfied the Mises ' yield condition; however, the stress distribution was hetero- geneous, and stresses near the bearing saddle bores of the casing were higher while those in other regions were much less than the allowable stress. For this reason, thicknesses of the casing wall on bearing assembling holes needed in- creasing, while those in other places can decrease. After much structural improving and re-analysis, the optimal casing design was found, and its weight decreased by 5% ; the casing still satisfied the Mises yield criterion and the stress distribution was more homogeneous. 展开更多
关键词 GEARBOX tracked vehicle structural analysis engine's full load characteristic curve
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基于改进T-S模糊模型的弧焊机器人轨迹实时跟踪
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作者 姚江云 王宽田 +1 位作者 李旺昆 梁世华 《组合机床与自动化加工技术》 北大核心 2024年第9期147-152,共6页
针对弧焊机器人在实际作业中受到诸多不确定因素的影响,导致弧焊机器人焊接轨迹偏离预期轨迹的问题,提出一种基于改进T-S(Takagi-Sugeno)模糊模型的弧焊机器人轨迹实时跟踪方法。采用图像识别技术识别并定位焊缝,通过坐标转换,确定焊缝... 针对弧焊机器人在实际作业中受到诸多不确定因素的影响,导致弧焊机器人焊接轨迹偏离预期轨迹的问题,提出一种基于改进T-S(Takagi-Sugeno)模糊模型的弧焊机器人轨迹实时跟踪方法。采用图像识别技术识别并定位焊缝,通过坐标转换,确定焊缝中心线在机器人坐标系中的位置坐标。利用蚁群算法根据焊缝中心线在机器人坐标系中的坐标,搜索从起始位置到目标位置的最优焊接路径。设计了一种改进区间二型T-S模糊模型,通过视觉传感器实时获取新的焊缝信息,计算轨迹误差,以此为输入,利用改进T-S模糊模型对机器人的运动轨迹进行实时调整。实验结果表明,采用改进T-S模糊模型后,机器人轨迹跟踪离散度均降至1 mm以下,弧焊机器人轨迹与预期轨迹高度重合,比传统方法跟踪离散度大大降低。 展开更多
关键词 改进T-s模糊模型 弧焊机器人 焊缝识别与定位 轨迹规划 轨迹实时跟踪方法
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Infrastructure of Synchrotronic Biosensor Based on Semiconductor Device Fabrication for Tracking, Monitoring, Imaging, Measuring, Diagnosing and Detecting Cancer Cells
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作者 Alireza Heidari 《Semiconductor Science and Information Devices》 2019年第2期29-57,共29页
Copper Zinc Antimony Sulfide(CZAS)is derived from Copper Antimony Sulfide(CAS),a famatinite class of compound.In the current paper,the first step for using Copper,Zinc,Antimony and Sulfide as materials in manufacturin... Copper Zinc Antimony Sulfide(CZAS)is derived from Copper Antimony Sulfide(CAS),a famatinite class of compound.In the current paper,the first step for using Copper,Zinc,Antimony and Sulfide as materials in manufacturing synchrotronic biosensor-namely increasing the sensitivity of biosensor through creating Copper Zinc Antimony Sulfide,CZAS(Cu1.18Zn0.40Sb1.90S7.2)semiconductor and using it instead of Copper Tin Sulfide,CTS(Cu2SnS3)for tracking,monitoring,imaging,measuring,diagnosing and detecting cancer cells,is evaluated.Further,optimization of tris(2,2'-bipyridyl)ruthenium(II)(Ru(bpy)32+)concentrations and Copper Zinc Antimony Sulfide,CZAS(Cu1.18Zn0.40Sb1.90S7.2)semiconductor as two main and effective materials in the intensity of synchrotron for tracking,monitoring,imaging,measuring,diagnosing and detecting cancer cells are considered so that the highest sensitivity obtains.In this regard,various concentrations of two materials were prepared and photon emission was investigated in the absence of cancer cells.On the other hand,ccancer diagnosis requires the analysis of images and attributes as well as collecting many clinical and mammography variables.In diagnosis of cancer,it is important to determine whether a tumor is benign or malignant.The information about cancer risk prediction along with the type of tumor are crucial for patients and effective medical decision making.An ideal diagnostic system could effectively distinguish between benign and malignant cells;however,such a system has not been created yet.In this study,a model is developed to improve the prediction probability of cancer.It is necessary to have such a prediction model as the survival probability of cancer is high when patients are diagnosed at early stages. 展开更多
关键词 synchrotronic Biosensor Copper Zinc Antimony sulfide CZAs(Cu1.18Zn0.40sb1.90s7.2)semiconductor Photomultiplier semiconductor Device trackING MONITORING IMAGING MEAsURING Diagnosing Detecting Cancer Cells Tris(2 2'-bipyridyl)ruthenium(II)(Ru(bpy)32%PLUs%)
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基于分数阶S面模型的四旋翼轨迹跟踪控制
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作者 李佳成 陈鹏云 常哲 《兵器装备工程学报》 CAS CSCD 北大核心 2024年第3期286-292,共7页
四旋翼无人机具有欠驱动、非线性、强耦合的特点。针对四旋翼无人机轨迹跟踪控制中跟踪精度低,抗外界干扰能力弱的特点,通过对四旋翼无人机进行四元数建模,使用误差四元数作为控制器输入,消除了无人机在机动角度过大时的奇点问题,提出... 四旋翼无人机具有欠驱动、非线性、强耦合的特点。针对四旋翼无人机轨迹跟踪控制中跟踪精度低,抗外界干扰能力弱的特点,通过对四旋翼无人机进行四元数建模,使用误差四元数作为控制器输入,消除了无人机在机动角度过大时的奇点问题,提出了一种分数阶S面的控制方法,即将分数阶PID控制与S面控制融合,作为一个新的控制器。轨迹跟踪试验表明,分数阶S面控制器在四旋翼无人机控制模型中的累计误差明显小于分数阶PID,证明了该方法具有抗风扰能力强、跟踪精度高的特点。 展开更多
关键词 四旋翼无人机 四元数 分数阶PID s面控制 轨迹跟踪
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The Black Protests in Poland: An Example of an Anti-pastoral Revolution
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作者 Szymon Wróbel 《Philosophy Study》 2024年第2期53-62,共10页
Michel Foucault in Security, Territory, Population: Lectures at the Collège de France, 1977-1978 argues, that there has never been such a thing as an anti-pastoral revolution in Western societies. Yes, we have ha... Michel Foucault in Security, Territory, Population: Lectures at the Collège de France, 1977-1978 argues, that there has never been such a thing as an anti-pastoral revolution in Western societies. Yes, we have had revolutions against the disciplinary apparatus and legal devices of power (schools, hospitals, prisons) and we have had examples of revolutions against the economic foundations of social inequality, but there has never been a genuine revolution against pastoral power as a power relating to the conduct of individuals (but also entire social groups) and their disposition to “voluntary submission” to the will of external authorities. In my paper, I would like to reflect on this thesis, and taking it quite seriously, to look for examples of such revolutions. One of them is a women’s strike in Poland during the power of the conservative government of “Law and Justice”. Mainly referring to the texts of Silvia Federici and Paul Preciado, I will want to reflect on contemporary practices of reclaiming the body in contemporary capitalism. I will defend the thesis that regaining control over sexuality and reproduction means changing the material conditions of life and modern reproductive technologies. 展开更多
关键词 black protest morning-after pill primitive accumulation procreation refusal resistance voluntary submission women’s reproductive strike
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A prob of the effect of psychological suggestion in Track and Field Sports
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作者 Chen Lijuan, female, 35 year old, lecturer. Chen Lijuan College of Physical Education, Southwest China Normal University, Chongqing 400715 《西南师范大学学报(自然科学版)》 CAS CSCD 北大核心 1998年第5期125-128,共4页
Modernsportspsychologicalmovesthatathletesconsumenotonlymuchphysicalstrength,butalsogreatpsychologicalenergy... Modernsportspsychologicalmovesthatathletesconsumenotonlymuchphysicalstrength,butalsogreatpsychologicalenergy,whenthey’reintra... 展开更多
关键词 PsYCHOLOGICAL sUGGEsTION EFFECT track and FIELD sports(T.F.s) training contest
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左金丸与反左金丸诱导人胃癌细胞SGC-7901凋亡的比较 被引量:13
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作者 彭求贤 余惠旻 +3 位作者 刘塔斯 张慧青 杨大坚 陈新滋 《肿瘤防治研究》 CAS CSCD 北大核心 2009年第6期459-461,共3页
目的比较左金丸(Zuojin Pill,ZP)和反左金丸(Retro-zuojin Pill,RZP)对人胃癌细胞(SGC-7901)生长的活性抑制和凋亡诱导作用。方法采用MTT比色法观ZP与RZP对SGC-7901的生长抑制情况;流式细胞仪PI单染亚二倍体峰分析细胞凋亡率;Hoechst33... 目的比较左金丸(Zuojin Pill,ZP)和反左金丸(Retro-zuojin Pill,RZP)对人胃癌细胞(SGC-7901)生长的活性抑制和凋亡诱导作用。方法采用MTT比色法观ZP与RZP对SGC-7901的生长抑制情况;流式细胞仪PI单染亚二倍体峰分析细胞凋亡率;Hoechst33258染色观察细胞形态学变化。结果0.1mg/mlZP与RZP分别作用SGC-7901细胞后,均能抑制细胞活性,且与时间呈依赖关系。0.1、0.5和1.0mg/mlRZP作用SGC-7901细胞48h,细胞凋亡率为(5.52±0.54)%、(6.91±2.31)%、(8.50±1.02)%,0.1、0.5和1.0mg/ml的ZP对细胞的凋亡率分别为(11.60±1.24)%、(21.80±0.28)%、(36.40±1.59)%,与对照组(1.69±1.91)%比较差异均有统计学意义(P<0.01)。Hochest染色细胞出现核固缩状和颗粒状荧光等典型的凋亡学特征。结论左金丸和反左金丸对SGC-7901生长都有明显的抑制作用并可诱导SGC-7901的凋亡,同一浓度的ZP和RZP作用SGC-7901相同时间,ZP的作用效果更为明显。 展开更多
关键词 左金丸 反左金丸 8GC-7901 细胞凋亡
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T-S模糊系统H∞跟踪控制设计 被引量:6
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作者 常晓恒 井元伟 +1 位作者 高曦莹 刘晓平 《控制与决策》 EI CSCD 北大核心 2008年第3期329-332,共4页
提出一种新的控制方法,以使T-S模糊控制系统达到H∞跟踪性能指标.首先提出一个新的H∞跟踪性能指标,该指标考虑了受控输出变量中控制系数不为零的情况,比以往的性能指标更具一般性;然后给出了H∞跟踪控制器增益存在的充分条件,该条件可... 提出一种新的控制方法,以使T-S模糊控制系统达到H∞跟踪性能指标.首先提出一个新的H∞跟踪性能指标,该指标考虑了受控输出变量中控制系数不为零的情况,比以往的性能指标更具一般性;然后给出了H∞跟踪控制器增益存在的充分条件,该条件可表示为线性矩阵不等式问题;最后通过一个仿真实例说明了所提出算法的有效性. 展开更多
关键词 T-s模糊系统 H∞跟踪控制 跟踪性能 线性矩阵不等式
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