共查询到20条相似文献,搜索用时 62 毫秒
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唐钢汽车衡数字一体化远程计量系统,是利用视频监控、音频对讲、远程控制、环境监测技术,同计算机网络技术相结合,建立集图像、声音、数据、现场设备监测和控制于一体的远程称重管理系统。它包括了称重、监控、数据采集、现场设备控制、信号传输、网络管理、轮巡调度称重等应用,具有明显的实用性、安全性、可靠性和先进性,并大大提高了劳动效率,节约了人力资源,有效堵塞了计量漏洞。 相似文献
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为克服传统电梯管理与维保方式存在的缺点,提出建立基于物联网技术的电梯安全监控系统.由感知层、汇聚层、传输应用层组成电梯安全监控系统设计架构,系统硬件采用模块化的设计方法,分别设计了中心控制模块、数据采集模块、GPRS模块、射频处理模块和电源模块;系统软件从基本信息模块、维保信息模块、监测信息模块和数据分析模块方面进行了设计,建立了电梯安全监控管理系统.基于物联网技术的电梯安全监控系统实现了电梯安全监控管理的自动化与信息化,将其应用推广具有广泛的社会与经济效益. 相似文献
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研究了基于物联网的机动车动力学参数安全检验监测技术,建立了运动、制动、载荷相关的数学模型,制订出测试方法,并研发记录仪与远程监测系统。通过实验验证,监测系统能够准确测量动力学相关的机动车安全检验技术参数,并可实现远程在线监控功能。该技术为机动车动力学分析提供理论方法,为准确测量制动力、动载荷等安全检验参数提供科学手段。另外,该系统建立集监测、控制、管理和决策于一体的机动车安全检验网络监测系统,为实现机动车安全检验信息与监管部门之间互联互通,构建基于物联网模式的机动车安全检验管理平台奠定基础。 相似文献
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A method is proposed for estimating the parameters of a mixture of exponential and Weibull distributions for which the accuracy of preliminary estimates obtained by graphical analysis is refined in accordance with the criterion of maximum likelihood. The efficiency of the proposed method is supported by the results of statistical modeling. 相似文献
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An approximate analytical expression is derived for the velocity of the front of the wave of change of boiling modes on a
rod and on a plate. The impact of the Thomson effect and of the heater orientation in the gravity field is included. Adequate
agreement is demonstrated between the derived relations and experimental data. 相似文献
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水三相点是开尔文热力学温度的唯一基准点,也是ITS-90国际温标重要的定义固定点。因此,水三相点不确定度分析对整个温标的建立、温度量值传递起着至关重要的作用。近3年来,中国计量科学研究院研制出一系列高质量的水三相点容器,加强了水三相点的研究,为不确定度的分析提供了更为可靠的实验依据。同时,不确定度的分析也是客观评价新研制容器性能的一个重要指标。因此,根据实验结果对新研制容器所复现的水三相点进行了不确定度评定。评定结果表明,其扩展不确定度为0.16mK(k=2.69,P=0.99)。 相似文献
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Liebert A Wabnitz H Grosenick D Möller M Macdonald R Rinneberg H 《Applied optics》2003,42(28):5785-5792
A novel method for the determination of the optical properties of tissue from time-domain measurements is presented. The data analysis is based on the evaluation of the first moment and the second centralized moment, i.e., the mean time of flight and the variance of the measured distribution of times of flight (DTOF) of photons injected by short (picosecond) laser pulses. Analytical expressions are derived for calculation of absorption and of reduced scattering coefficients from these moments by application of diffusion theory for infinite and semi-infinite homogeneous media. The proposed method was tested on experimental data obtained with phantoms, and results for absorption and reduced scattering coefficients obtained by the proposed method are compared with those obtained by fitting of the same data with analytical solutions of the diffusion equation. Furthermore, the accuracy of the moment analysis was investigated for a range of integration limits of the DTOF. The moment analysis may serve as a comparatively fast method for evaluating optical properties with sufficient accuracy and can be used, e.g., for on-line monitoring of optical properties of biological tissue. 相似文献
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