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基于BIM云系统的数据分类与处理研究 被引量:1
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作者 陈曦 《辽宁师专学报(自然科学版)》 2017年第2期33-36,共4页
为了优化BIM云平台的数据分类,提高处理效率,提出一种使用MRU算法对用户常用数据进行分类处理的策略.详细论述了实现的过程以及关键技术.实验表明,使用该方法处理数据,比使用传统Hadoop方法处理数据,所需的时间明显减少,能够提高BIM云... 为了优化BIM云平台的数据分类,提高处理效率,提出一种使用MRU算法对用户常用数据进行分类处理的策略.详细论述了实现的过程以及关键技术.实验表明,使用该方法处理数据,比使用传统Hadoop方法处理数据,所需的时间明显减少,能够提高BIM云平台数据分类与处理的效率. 展开更多
关键词 云计算 建筑信息模型 MRU算法 数据分类处理
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云计算背景下大数据自动分类处理系统设计
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作者 杨悦 《电子技术与软件工程》 2021年第22期177-179,共3页
本文主要以数据自动分类处理系统为例,综合理论与实践,从而分析在云计算背景下大数据自动处理系统的运行与设计流程,最后得出相应设计要点,以期对相关从业者提供参考与帮助。
关键词 云计算 数据自动分类处理 系统设计
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智能电网用户侧信息隐私保护方法的研究与应用 被引量:7
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作者 郭晓利 张佳佳 王秀磊 《电测与仪表》 北大核心 2016年第24期94-99,共6页
在智能电网的不断建设和发展过程中积累了大量的基础用电数据,这些数据不仅具有海量、高频、分散等特点,是时空、动态、关系等性质复杂的数据,而且数据之间存在关联性和相似性。因此,传统的隐私保护方法对电力数据保护会有较大的信息损... 在智能电网的不断建设和发展过程中积累了大量的基础用电数据,这些数据不仅具有海量、高频、分散等特点,是时空、动态、关系等性质复杂的数据,而且数据之间存在关联性和相似性。因此,传统的隐私保护方法对电力数据保护会有较大的信息损失,时间损耗,基于数据分类处理的思想,提出支持多属性泛化的随机化的隐私保护方法对电力信息数据进行分级保护,将准标识符属性按照自底向上支持多属性泛化的算法处理,敏感属性进行随机化算法处理,生成保护后的新数据表。通过与广泛应用的MBF算法,GASCG算法进行实验比较得出结论,该方法可以极大的提高隐私保护的效率降低个人信息的损失并且数据的效用性大大提高。 展开更多
关键词 数据分类处理 K-匿名 泛化 随机扰动 多敏感属性
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基于与X-steel连接的板材排版系统开发 被引量:1
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作者 李挺前 符秀全 张世亮 《广东化工》 CAS 2012年第1期184-184,192,共2页
文章介绍一种与X-steel连接的板材排版系统。系统读入X-steel输出的构件报告文件,对构件数据进行分类处理。对板材构件,设计快速可行的排版算法,排版的结果理想。
关键词 X-steel 板材排版 数据分类处理
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基于工作序列与负载平衡的云计算效率改进研究
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作者 陈曦 《电大理工》 2016年第3期22-24,共3页
随着大规模计算技术的发展,云计算通过虚拟化技术产生虚拟机来提升物理机器的资源利用率,进而增加处理工作的效率。为了将工作分配至最适当的虚拟机上执行使得全体工作能以最小的总完工时间完成,提出了一种基于工作序列与负载平衡处理策... 随着大规模计算技术的发展,云计算通过虚拟化技术产生虚拟机来提升物理机器的资源利用率,进而增加处理工作的效率。为了将工作分配至最适当的虚拟机上执行使得全体工作能以最小的总完工时间完成,提出了一种基于工作序列与负载平衡处理策略,并进行了研究,详细论述了实现的过程以及关键技术。通过实验表明,该方法取得了良好的实验效果,能够提升云计算平台的处理效率。 展开更多
关键词 云计算 工作序列与负载平衡 虚拟化技术 数据分类处理
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New WA-system of kravchenko functions in digital signal processing 被引量:1
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作者 V F Kravchenko D V Churikov 《Journal of Measurement Science and Instrumentation》 CAS 2012年第4期345-351,共7页
On the basis of modified atomic transformations the new WA-systems of Kravchenko functions are constructed.As an example the digital processing of time series of the various physical nature processing is considered.Th... On the basis of modified atomic transformations the new WA-systems of Kravchenko functions are constructed.As an example the digital processing of time series of the various physical nature processing is considered.The numerical experiments and physical analysis of the results confirm the efficiency of the proposed WA-systems of Kravchenko functions. 展开更多
关键词 atomic functions WA-systems of functions WAVELETS digital signal processing(DSP)
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Object-tracking robot using ultrasonic sensor and servo motor 被引量:1
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作者 Kyounghwan Kim Hyunseop Lim +1 位作者 Yoseop Hwang Jangmyung Lee 《Journal of Measurement Science and Instrumentation》 CAS 2012年第4期379-382,共4页
This paper proposes a method that rotation angle of servo motor and distance values of ultrasonic sensor are used for tracking an object in real-time while the robot keeps regular distance.Object detection distance wi... This paper proposes a method that rotation angle of servo motor and distance values of ultrasonic sensor are used for tracking an object in real-time while the robot keeps regular distance.Object detection distance widens by using ultrasonic sensors and object recognition,and movement of robot is controlled by angle of servo motor and distance of ultrasonic sensors.Not adopting the existing tracking methods:camera,laser-infrared(LRF)and many ultrasonic sensors,the proposed method proves that it is possible to track object using ultrasonic sensor and servo motor.Trajectory of robot is represented and analysed according to movement of object in limited conditions. 展开更多
关键词 tracking robot ultrasonic sensor servo motor mobile robot
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MPPT research based on fuzzy adaptive PID control 被引量:1
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作者 张开如 潘安琪 初雪娇 《Journal of Measurement Science and Instrumentation》 CAS 2012年第4期389-392,共4页
In order to improve the efficiency and precision of maximum power point tracking(MPPT)control,a new method is proposed.Based on original MPPT technology of photovoltaic cells,the fuzzy adaptive proportion-integral-dif... In order to improve the efficiency and precision of maximum power point tracking(MPPT)control,a new method is proposed.Based on original MPPT technology of photovoltaic cells,the fuzzy adaptive proportion-integral-differential(PID)control has less fluctuation and higher stability.The simulation circuit using Simulink is established,and output power curves under constant temperature or constant sunlight are obtained.The superiority of the fuzzy PID control method has been proved by means of the simulation results,and it makes the solar system approach maximum power point quickly and smoothly. 展开更多
关键词 photovoltaic cells fuzzy proportion-integral-differential(PID) maximum power point tracking(MPPT) SIMULINK
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Identifying uncertainty sources in measurements-A methodology
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作者 Nitin K Mandavgade S B Jaju R R Lakhe 《Journal of Measurement Science and Instrumentation》 CAS 2012年第4期307-312,共6页
The overall purpose of performing measurements in science is to increase knowledge and document about some physical quantity. The measurand has a true value but, except for straightforward counting situations, the tru... The overall purpose of performing measurements in science is to increase knowledge and document about some physical quantity. The measurand has a true value but, except for straightforward counting situations, the true value can never be fully determined. When a quantity is measured, the outcome depends on the measuring system, the measurement procedure, the skill of the operator, the environment and other effects. In practice the uncertainty on the result may arise from many possible sources, including examples such as incomplete definition, sampling, matrix effects and interferences, environmental couditions, uncertainties of weights and volumetric equipment, reference wtlues, approximations and assump- tions incorporated in the measurement method and procedure, and random wlriation. The objective of the paper is how to identify the sources of uncertainty in measurement and their importance on the result. 展开更多
关键词 meassurement ERROR true value UNCERTAINTY cause and effects analysis SOURCES questioner
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Most relevant weighted filtering with one-step singular correlation recognition
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作者 刘超 蔡建超 《Journal of Measurement Science and Instrumentation》 CAS 2012年第4期328-332,共5页
Based on the recognition of one-step singular correlation and the remedying methods obtained before,the correlation properties of the neighborhood pixels and the characteristics of image de-noising were analyzed.A kin... Based on the recognition of one-step singular correlation and the remedying methods obtained before,the correlation properties of the neighborhood pixels and the characteristics of image de-noising were analyzed.A kind of most relevant weighted filtering method based on one-step singular correlation recognition(OSSC-MRWF)was put forward.The simulation experiments were done and the comparison with some commonly used methods under salt-and-pepper noises was made.The results show that the proposed method can not only effectively recognize salt-and-pepper noises and mend up the noise points,but also protect the original information such as the edge details very well.The accuracy and performance indicators are further improved considerably. 展开更多
关键词 correlation function image filtering one-step singular correlation singular value recognition weighted filter- ing salt-and-pepper noise
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A framework of hybrid authentication for link access under MIH environments
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作者 Kangsuk Chae Jiman Mun Souhwan Jung 《Journal of Measurement Science and Instrumentation》 CAS 2012年第4期362-369,共8页
A unified hybrid authentication framework was proposed to provide proactive authentication and re-authentication for media independent handover(MIH)-based multi-wireless access. In addition, a specific protocol dist... A unified hybrid authentication framework was proposed to provide proactive authentication and re-authentication for media independent handover(MIH)-based multi-wireless access. In addition, a specific protocol distributing a hierarchi- cal key after the proactive authentication from key holder to base station has been proposed. The proposed hybrid authenti- cation framework not only performs proaetive authentication with credentials based on Chameleon hashing, which removes the authentication procedures that exchanges messages with a authentication server, but also performs re-authentication with EAP re-authentication protocol(ERP) that distributes the hierarchical key on the basis of the root key generated by the pro- active authentication. 展开更多
关键词 hybrid authentication vertical handover media independent handover(MIH) chameleon hashing extensible authentication protocol(EAP) EAP re-authentication protocol(ERP)
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Preparation and characterization of alumina nanoparticles in non-aqueous solution
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作者 张少明 王涑波 胡双启 《Journal of Measurement Science and Instrumentation》 CAS 2012年第4期317-319,共3页
Nanometer Al2O3powder is prepared by sol-gel method.Trans mission electron microscope(TEM),X-ray diffrac-tion(XRD),ther mal analysis,IR and the grain-testing instructure are used to characterize the particle shape and... Nanometer Al2O3powder is prepared by sol-gel method.Trans mission electron microscope(TEM),X-ray diffrac-tion(XRD),ther mal analysis,IR and the grain-testing instructure are used to characterize the particle shape and phase,chemical bonds of hydrous cassiterite andsize distribution after being heated.XRDand TEMshowthat the powder is fibrous γ-Al2O3at800 ℃andsphericalα-Al2O3at1 200℃.The grain-testinginstructure shows that the average particle diameter of γ-Al2O3is36.2nm while that ofα-Al2O3is125.6nm.The IRshows that aluminumstearate is synthesizedin the process of sol-gel. 展开更多
关键词 stearic acid non-aqueous solution AI2 03 PREPARATION CHARACTERIZATION
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Balancing control of unicycle robot by using sliding control
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作者 Inwoo Han Jaewon An +1 位作者 Hyunwoo Kim Jangmyung Lee 《Journal of Measurement Science and Instrumentation》 CAS 2012年第4期383-388,共6页
This paper discusses about balancing control of unicycle robot.Unicycle robot consists of pitch which acts like inverted pendulum and roll which acts like reaction wheel pendulum.The robot which does not have actuator... This paper discusses about balancing control of unicycle robot.Unicycle robot consists of pitch which acts like inverted pendulum and roll which acts like reaction wheel pendulum.The robot which does not have actuator located in yaw axis is made to derive the simple dynamics.Lagrange equation is applied to deriving dynamic equations.Obtained dynamic equations are used to design the sliding mode control.State variables of the designed control are pitch angle and roll angle.Sliding mode control has chattering problem,which is eliminated by using the sigmoid function as switching function.Finally the control performance and eliminated chattering problem is verified by simulation. 展开更多
关键词 balancing control sliding control dynamic equation LAGRANGE unicycle robot
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Implementation of motion estimator algorithm with 1/4 pixel accuracy based on FPGA
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作者 向厚振 王鹏 +1 位作者 姚娟 张志杰 《Journal of Measurement Science and Instrumentation》 CAS 2012年第4期341-344,共4页
After research on the motion estimation algorithm in video coding, a motion estimator algorithm with 1/4 pixel ac- curacy is implemented based on fie/d-programmable gate array (FPGA). The motion estimation algorithm... After research on the motion estimation algorithm in video coding, a motion estimator algorithm with 1/4 pixel ac- curacy is implemented based on fie/d-programmable gate array (FPGA). The motion estimation algorithm module is made up of the 1[4 pixel interpolation module with serial input and parallel output, the three step search module and the block match- ing module, which can use relatively less Wiener filters for interpolation operation. Experiment results show that the hard- ware design has less consumption of the logical resource, higher stability and lower power consumption. 展开更多
关键词 H. 264/AVC 1/4 pixel three-step search motion estimation field-programmable gate array (FPGA)
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Information entropy-based estimation of hand and elbow movements using ECoG signals
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作者 Kihyun Kim Kabmun Cha +1 位作者 Chunkee Chung Hyunchool Shin 《Journal of Measurement Science and Instrumentation》 CAS 2012年第4期357-361,共5页
A method of estimating hand and elbow movements using electrocorticogram (ECoG) signals is proposed. Using multiple channels, surface electromyogram (EMG) signals and ECoG signals were obtained from patients simul... A method of estimating hand and elbow movements using electrocorticogram (ECoG) signals is proposed. Using multiple channels, surface electromyogram (EMG) signals and ECoG signals were obtained from patients simultaneously. The estimated movements were those to close and then open the hand and those to bend the elbow inward. The patients were encouraged to perform the movements in accordance with their free will instead of after being induced by external stimuli. Surface EMG signals were used to find movement time points, and ECoG signals were used to estimate the movements. To extract the characteristics of the individual movements, the ECoG signals were divided into a total of six bands (the entire band and the ~, 0, a ,fl and 7 bands) to obtain the information entropy, and the maximum likelihood estimation method was used to estimate the movements. The results of the experiment show that the performance averages 74 % when the ECoG of 7 band is used, which is higher than that when other bands are used, and higher estimation success rates are shown in the 7 band than in other bands. The time of the movements is divided into three time sections based on movement time points, and the "Before" section, which includes the readiness potential, is compared with the "Onset" section. In the "Before" section and the "Onset" section, estimation success rates are 66 % and 65 %, respectively, and thus it is determined that the readiness potential could can be used. 展开更多
关键词 electrocorticogram (ECoG) γ band ENTROPY maximum likelihood estimation readiness potential
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Study on Raman and SERS spectra of filter paper and silica gel plate
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作者 欧阳雨 《Journal of Measurement Science and Instrumentation》 CAS 2012年第4期313-316,共4页
Raman spectra and surface-enhanced Raman scattering (SERS) spectra of filter paper and silica gel plate are ob- tained at 785-nm excitation wavelength. The results show that filter paper has thirteen Raman lines in ... Raman spectra and surface-enhanced Raman scattering (SERS) spectra of filter paper and silica gel plate are ob- tained at 785-nm excitation wavelength. The results show that filter paper has thirteen Raman lines in 800 - 1 500 cm 1 and silica gel plate has eight lines in the region of 400 - 1 200 cm-I. The frequencies and Raman active modes are assigned. By comparing their Raman spectra and SERS spectra, we find that the silver colloid could repress the Raman intensities of filter paper and silica gel plate, and reduce their effects on the combination of thin-layer chromatographic (TLC) and SERS. Ac- cording to SERS spectra, the bands at 997 cm 1,1 094 cm I ,1 118 cm-1 ,1 336 cm-1 and 1 378 cm-1 for filter paper and the peak of v l [ SO4] symmetric stretching vibration (--1 017 cm-1 ) for silica gel plate also have high intensities, and those lines should be paid enough attention in TLC-SERS. 展开更多
关键词 hromatography paper chromatography silica gel plate Raman spectroscopy Surface-enhenced Raman scat- tering(SERS)
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Test on methane flame velocity in horizontal tube with obstacles
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作者 谭迎新 尉存娟 《Journal of Measurement Science and Instrumentation》 CAS 2012年第4期320-322,共3页
To test flame propagation velocity of gas explosion in a horizontal tube,a set of flame velocity testing system is designed.The system is composed of two parts:a horizontal tube used for methane burning and a flame de... To test flame propagation velocity of gas explosion in a horizontal tube,a set of flame velocity testing system is designed.The system is composed of two parts:a horizontal tube used for methane burning and a flame detection system.The effect of obstacles on flame propagation velocity of methane explosion is tested.Methane volume density is 10% in the tube.The obstacle is the circular ring,2 mm thick.Its blockage ratios are 40%,50% and 60%,respectively.The number of obstacles put in the tube is 1,3,5 and 7.Experimental results show that the obstacle has obviously accelerating effect on flame wave of gas explosion.As the number and blockage ratios of the obstacles increase,flame accelerating became more obviously.When there are seven obstacles,the maximum average flame velocity reaches over 351.2 m/s.When the blockage ratio of three obstacles is 60%,the maximum average flame velocity is 238.9 m/s. 展开更多
关键词 gas explosion OBSTACLE flame velocity horizontal tube METHANE
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Classification of the mining land cover based on density segmentation
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作者 孙茜茜 王萍 《Journal of Measurement Science and Instrumentation》 CAS 2012年第4期336-340,共5页
The Datun mining area is the test area in this paper,and the purpose is to obtain the mining land cover classification map in 2003.The data source used in this paper is the Landsat enhanced thematic mapper plus(ETM)re... The Datun mining area is the test area in this paper,and the purpose is to obtain the mining land cover classification map in 2003.The data source used in this paper is the Landsat enhanced thematic mapper plus(ETM)remote sensing data.By obtaining the normalized difference vegetation index(NDVI)of the study area,the land cover classification information is extracted using the density segmentation method.Because the results cannot distinguish the construction land and wetland,this paper obtains the humidity information of multi-spectral data through the tasseled cap transformation.From the density segmentation image of humidity information,the construction and wetland types can be clearly distinguished.Finally,combining the two classification maps,the visual interpretation using Landsat ETM fusion image with 15-m resolution helps to get the final classification results.After classification accuracy assessment,the overall accuracy calculated from the classification confusion matrix is 86%.This result can be applied in actual project. 展开更多
关键词 density segmentation processing of small polygons tasseled cap accuracy assessment
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Bounding box based on probability density for the pedestrian tracking
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作者 Jaehyun So Hernsoo Hahn Youngjun Han 《Journal of Measurement Science and Instrumentation》 CAS 2012年第4期333-335,共3页
This paper proposes a pedestrian tracking approach using bounding box based on probability densities.It is generally a difficult task to track features like corner points in outdoor images due to complex environment.T... This paper proposes a pedestrian tracking approach using bounding box based on probability densities.It is generally a difficult task to track features like corner points in outdoor images due to complex environment.To solve this problem,the feature points are projected along X and Y direction separately,and a histogram is constructed for each projection,with horizontal axis as positions and vertical axis as the number of feature points that lie on each position.Finally,the vertical axis is normalized for expression as probability.After histogram is constructed,the probability of each feature point is checked with a threshold.A feature point will be ignored if its probability is lower than a threshold,while the remaining feature points are grouped,based on which a bounding box is made.Kanade-Lucas Tomasi(KLT)algorithm is adopted as the tracking algorithm because it is able to track local features in images robustly.The efficiency of the tracking results using this method is verified in real environment test. 展开更多
关键词 pedestrian tracking probability density bounding box Kanade-Lucas Tomasi(KLT) feature tracker
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Application of multi-GRNN with a gating network in stock prices forecast
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作者 卢金娜 胡红萍 白艳萍 《Journal of Measurement Science and Instrumentation》 CAS 2012年第4期374-378,共5页
This paper proposes the generalized regression neural network(GRNN)model and multi-GRNN model with a gating network by selecting the data of Shanghai index,the stocks of Shanghai Pudong Development Bank(SPDB),Dongfeng... This paper proposes the generalized regression neural network(GRNN)model and multi-GRNN model with a gating network by selecting the data of Shanghai index,the stocks of Shanghai Pudong Development Bank(SPDB),Dongfeng Automobile and Baotou Steel.We analyze the two models using Matlab software to predict the opening price respectively.Through building a softmax excitation function,the multi-GRNN model with a gating network can obtain the best weights.Using the data of the four groups,the average of forecasting errors of 4 groups by GRNN neural model is 0.012 208,while the average of the multi-GRNN models's with a gating network is 0.002 659.Compared with the real data,it is found that the both results predicted by the two models have small mean square prediction errors.So the two models are suitable to be adopted to process a large quantity of data,furthermore the multi-GRNN model with a gating network is better than the GRNN model. 展开更多
关键词 stock forecasting GRNN model gating network softmax incentive
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