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ARC/INFO系统在林业图形处理上的应用
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作者 连欣俐 《福建林业科技》 1995年第S1期93-97,共5页
本文应用ARC/INFO系统对林业图形的处理进行了分析研究,探讨了林业图形制作自动化及图形信息分析、管理系统化的有效途径。
关键词 ARC/INFO系统 林业图形 处理系统化
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掘进工作面智能化控制体系探讨 被引量:1
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作者 雷寅虎 《能源科技》 2023年第3期32-35,共4页
在我国社会经济高速发展的过程中,煤矿企业具有重要的经济作用。煤矿企业要实现健康持续发展,就要对现有的工作内容进行优化完善,合理应用各种现代化的机械设备与技术手段。掘进工作面智能化控制系统,可以实现多种信息数据的系统化处理... 在我国社会经济高速发展的过程中,煤矿企业具有重要的经济作用。煤矿企业要实现健康持续发展,就要对现有的工作内容进行优化完善,合理应用各种现代化的机械设备与技术手段。掘进工作面智能化控制系统,可以实现多种信息数据的系统化处理,有效解决了巷道掘进作业恶劣的工作环境、远程监控与无人化作业不足等问题。综合煤矿掘进工作面的设备与工艺,在现代技术手段的支持下,分析掘进工作面智能化控制系统的功能与特征,对于智慧矿山发展具有积极推动作用。 展开更多
关键词 掘进工作面 智能化控制 系统化处理
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塌方影响下凤岭隧道贯通施工技术及数值模拟研究 被引量:4
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作者 张龙生 翁贤杰 《隧道建设》 北大核心 2016年第4期465-473,共9页
隧道即将贯通时遭遇塌方,会使贯通面临塌方可靠处理和贯通安全施工双重困难。为保障隧道贯通施工安全,避免塌方,依托江西省昌宁高速公路凤岭隧道在塌方影响下的贯通施工,通过分析研究隧道贯通施工处理过程中的重点和难点,提出综合物理... 隧道即将贯通时遭遇塌方,会使贯通面临塌方可靠处理和贯通安全施工双重困难。为保障隧道贯通施工安全,避免塌方,依托江西省昌宁高速公路凤岭隧道在塌方影响下的贯通施工,通过分析研究隧道贯通施工处理过程中的重点和难点,提出综合物理探测、塌方段管棚注浆支护、贯通面合理确定、贯通段管棚注浆支护以及洞身短开挖强支护等系统化的技术方法,并采用三维数值模拟方法对施工过程中围岩、初期支护的应力和位移进行分析,验证施工处理技术的可行性。现场监测结果和处理效果证明,该系统化施工技术体系在塌方影响下的隧道贯通施工是安全有效的。 展开更多
关键词 凤岭隧道 塌方 隧道贯通 系统化处理技术 数值模拟 监测
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基于内部控制框架的公立医院财务风险分析 被引量:4
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作者 李伟 《财会学习》 2019年第28期62-62,64,共2页
随着我国市场经济体制的不断完善和医药体制改革的不断深入,公立医院的管理模式和运行机制都发生了较大变化,财务风险也随之增加。引发财务风险的因素,几乎都是客观存在的,并且此种风险在医院运行中的每一个环节都有可能发生,因此财务... 随着我国市场经济体制的不断完善和医药体制改革的不断深入,公立医院的管理模式和运行机制都发生了较大变化,财务风险也随之增加。引发财务风险的因素,几乎都是客观存在的,并且此种风险在医院运行中的每一个环节都有可能发生,因此财务风险在时间、空间上都具有不确定性。预测乃至预防财务风险,要从医院内部控制架构方面入手,建立规范的内控体系,降低财务风险发生的概率,为医院的稳定发展打好基础。 展开更多
关键词 内部控制框架 公立医院 财务风险 系统化处理手段
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Threshold decision for instrument control system and its application in nuclear power plant
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作者 刘华 李军红 +1 位作者 文杰 阳武娇 《Journal of Measurement Science and Instrumentation》 CAS 2014年第4期79-82,共4页
Threshold decision is an important function of nuclear instrument control system based on physical parameters threshold decision. Because the conventional decision methods lack correlation with time and conditions, by... Threshold decision is an important function of nuclear instrument control system based on physical parameters threshold decision. Because the conventional decision methods lack correlation with time and conditions, by analyzing the existing methods, some optimized methods are adopted. Considering safety, those methods are improved in data processing algorithms, floating threshold with multiple values, association with specific working condition, etc. These measures im- prove the nuclear instrument control system in fault tolerance and fault diagnosis, especially, the shutdown number of nucle- ar power plant decreases. 展开更多
关键词 digital control system of instrument and control (DCS I&C) data processing THRESHOLD MONITORING decisionoptimization
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Operation and Optimization of Residue Hydrotreating Unit Using New Catalyst System 被引量:3
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作者 Yin Zhaolin 《China Petroleum Processing & Petrochemical Technology》 SCIE CAS 2012年第3期50-58,共9页
This article has summarized the optimized measures relating to the loading of catalyst,and the sixth operating cycle of the residue hydrotreating unit at SINOPEC's Maoming Branch Company,and made a detailed compar... This article has summarized the optimized measures relating to the loading of catalyst,and the sixth operating cycle of the residue hydrotreating unit at SINOPEC's Maoming Branch Company,and made a detailed comparison on the impurities removal rate,hydrogen consumption and energy consumption of the sixth operating cycle with those achieved by the previous five cycles.Test results have revealed that the second-generation RHT series novel residue hydrotreating catalysts featured high activity,good stability,and long operating cycle and could remarkably reduce the hydrogen consumption and energy consumption of process unit.The hydrotreated AR product,having low Conradson carbon residue,low sulfur content,low metal content,high content of saturated hydrocarbons,and low content of asphaltenes and resins,is an excellent FCC feed.Judging from their overall property the second-generation RHT series of residue hydrotreating catalysts used in the sixth operating cycle have commanded a leading position among other catalysts used in previous operating cycles. 展开更多
关键词 residue hydrotreating CATALYST performance of unit OPTIMIZATION
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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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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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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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ECOLOGICAL RESTORATION:OUR HOPE FOR THE FUTURE? 被引量:1
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作者 WANGXu-gao LIXiu-zhen +1 位作者 HEHongS HUYuan-man 《Chinese Geographical Science》 SCIE CSCD 2004年第4期361-367,共7页
Ecological restoration is widely employed from tens to millions of hectares in space,and from tens of days to thousands of years in time, which forces consideration of it thoroughly. We argue that three questions are ... Ecological restoration is widely employed from tens to millions of hectares in space,and from tens of days to thousands of years in time, which forces consideration of it thoroughly. We argue that three questions are the most important among the contents relevant of ecological restoration, including why, what and how to restore degraded systems. Why to restore determines whether or not the degraded ecological systems should be restored. What to restore is the goal of ecological restoration. The explicit goal of ecological restoration is necessary to guide ecological restoration workers in pursuit of excellence and prevent restoration from being swamped by purely technological activities. And how to restore means the methods and steps we should apply. To ensure the final success of ecological restoration, restored sites should be monitored and managed for long time to determine whether the selected methods are appropriate, and can be remedy better. Only to deal with these effectively, ecological restoration would be the hope for the future. 展开更多
关键词 ecological restoration degraded systems ecosystem monitoring
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电子账务处理系统中辅助账的设置与应用分析
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作者 康燕 《企业改革与管理》 2016年第1期130-131,共2页
随着社会的发展、科技的进步,现在企业中的各项工作都在使用计算机辅助来完成,会计核算工作也不例外。在现代企业中很多会计科目的共组都要借助计算机辅助才能够顺利完成,传统的方法也可以完成,但是效率以及准确率低下,还会耗费大量人... 随着社会的发展、科技的进步,现在企业中的各项工作都在使用计算机辅助来完成,会计核算工作也不例外。在现代企业中很多会计科目的共组都要借助计算机辅助才能够顺利完成,传统的方法也可以完成,但是效率以及准确率低下,还会耗费大量人力。以计算机和信息技术作为依托电子账务处理系统应运而生,电子账务处理系统大大提高了会计核算工作的速度以及准确率。但是现实当中的会计核算工作总有一些账务不能够被全部记录,这是因为业务数据过于烦琐,为了对这些不能够被记录的数据进行记录在电子账务处理系统中设置了辅助账,解决了这些数据不能够被全部记录的问题。本文对电子账务处理系统中辅助账的设置和应用进行了分析。 展开更多
关键词 会计核算 电子账务处理系统化 辅助账
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Noise degradation system using Wiener filter and CORDIC based FFT/IFFT processor 被引量:2
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作者 Yasodai A Ramprasad A V 《Journal of Central South University》 SCIE EI CAS CSCD 2015年第10期3849-3859,共11页
On augmentation of past work, an effective Wiener filter and its application for noise suppression combined with a formed CORDIC based FFT/IFFT processor with improved speed were executed. The pipelined methodology wa... On augmentation of past work, an effective Wiener filter and its application for noise suppression combined with a formed CORDIC based FFT/IFFT processor with improved speed were executed. The pipelined methodology was embraced for expanding the execution of the system. The proposed Wiener filter was planned in such an approach to evacuate the iteration issues in ordinary Wiener filter. The division process was supplanted by a productive inverse and multiplication process in the proposed design. An enhanced design for matrix inverse with reduced computation complexity was executed. The wide-ranging framework processing was focused around IEEE-754 standard single precision floating point numbers. The Wiener filter and the entire system design was integrated and actualized on VIRTEX 5 FPGA stage and re-enacted to approve the results in Xilinx ISE 13.4. The results show that a productive decrease in power and area is developed by adjusting the proposed technique for speech signal noise degradation with latency of n/2 clock cycles and substantial throughput result per every 12 clock cycles for n-bit precision. The execution of proposed design is exposed to be 31.35% more effective than that of prevailing strategies. 展开更多
关键词 Wiener filter ITERATIONS power spectrum FFT/IFFT floating point noise suppression speech enhancement VLSI speed power area
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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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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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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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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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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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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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