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文章依据相关国家标准,结合海洋环境监测站的实际工作需求,针对环境自动观测系统的盐度传感器,提出新的现场校准方法,即直接比较法;根据不确定度来源,分别计算由测量重复性、盐度标准器、测量环境、测量人员和恒温水槽引入的不确定度分量并合成标准不确定度,据此计算扩展不确定度和合成标准不确定度的有效自由度,由此得出盐度传感器现场校准测量结果的不确定度为0.17。本研究提出的盐度传感器现场校准方法更契合海水盐度的变化规律,可实现盐度分量的量值溯源,具有准确度高和溯源途径清晰的特点;不确定度评定方法科学合理,且具有一定的推广价值。 相似文献
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文章依据JJG(海洋)01-1994《海洋资料浮标传感器检定规程》[1]、JJG860-1994《压力传感器(静态)检定规程》以及2013年8月13日最新实施的JJG1084-2013《数字式气压计检定规程》,结合海洋环境监测站和海洋资料浮标的海洋环境自动观测系统设备现场校准工作,研究总结了应用0.02级数字式气压计在现场校准0.1级气压传感器的校准方法,并在实际工作中得到使用,结果准确可靠。依据JJF1059-1999《测量不确定度评定与表示》,运用测量结果不确定度评定与表示方法,对测量结果不确定度进行了评定。符合条件要求的测量结果,一般可参照使用本不确定度的评定方法。 相似文献
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为全面准确地评定GNSS(Global Navigation Satellite System)海洋浮标测得瞬时海面高程的动态不确定度,根据GNSS海洋浮标的工作原理、系统组成及数据处理方法,提出了针对具体测量过程的瞬时海面高程动态不确定度评定方法。将浮标动态测量过程分解为静态测量过程的集合,采用GUM(Guide to the Expression of Uncertainty in Measurement)方法建立了测量模型,详细分析和计算了静态测量过程中瞬时海面高程的不确定度分量:GNSS高程不确定度、GNSS天线高程改正不确定度和高程异常不确定度,最后合成瞬时海面高程的动态标准不确定度和动态扩展不确定度。使用该方法对近海GNSS浮标测量结果进行了动态不确定度评定,验证了此方法的可行性,也为评价GNSS浮标测量结果质量提供了有效依据。 相似文献
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为完善我国海洋能发电装置室内试验的量值溯源和量值传递,提高实验室测量数据的科学性和严谨性,保障海试工作的顺利开展,文章根据相关国际指南和标准,以潮流能发电装置模型能量俘获效率的室内试验为例,研究测量不确定度的评定方法。研究结果表明:根据潮流能发电装置模型能量俘获效率的计算公式,其测量不确定度评定的分量包括叶轮半径、水流速、水密度以及扭矩仪扭矩和转速;分别计算各分量的标准不确定度并进行合成,最终得出俘获效率的分散区间;该方法可为海试阶段样机的测量不确定度评定奠定基础。 相似文献
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电位测定法测海水氧化还原电位的不确定度评定 总被引:2,自引:0,他引:2
采用电位测定法对实际海水的氧化还原电位进行测定,分析了影响测量不确定度的主要来源,对曲线拟合、测定过程的标准溶液的使用、仪器使用和测量重复性等影响不确定度的分量进行分析,按JJF1059—1999《测量不确定度评定与表示》的规定进行合成,最终给出扩展不确定度。结果表明,实际海水电位值的合成标准不确定度为14.18 mV,扩展不确定度为28.4 mV(近似95%置信概率)。这样结果的表达更加客观和真实,更具有参考意义。 相似文献
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为科学评价测量结果的可靠性,对海水中137Cs γ能谱分析方法的不确定度进行了评估。根据《化学分析中不确定度的评估指南》,分析不确定度的来源并逐一对各不确定度分量进行了量化,最终计算了合成相对标准不确定度。结果表明,影响海水中137Cs γ能谱测量不确定度的因素分别为样品源137Cs峰区计数、标准源活度、取样体积、化学回收率、本底137Cs峰区计数及标准源137Cs峰区计数,其中样品源137Cs峰区计数的不确定度贡献最为突出。对于137Cs活度浓度为1.28 mBq/L的海水样品,其合成相对标准不确定度为9.78%。 相似文献
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S. M. Khaykin V. A. Yushkov L. I. Korshunov A. N. Luk’yanov J. -P. Pommereau J. Nielsen H. Vömel 《Izvestiya Atmospheric and Oceanic Physics》2010,46(1):76-84
The results of measurements of water-vapor vertical profiles in the upper troposphere and stratosphere on board a meteorological
balloon with a FLASH-B optical fluorescent hygrometer (Russia) are presented. These data were obtained during two international
field campaigns in West Africa (August 2006) and Central America (August 2007). Eleven high-resolution water-vapor vertical
profiles measured in the course of these works make it possible to characterize the processes controlling humidity in the
tropical tropopause region. Layers with increased humidity are detected in the lower stratosphere over West Africa to the
level of the potential temperature 450 K. An analysis of satellite maps of the brightness temperature, balloon ozone measurements,
and aerosol scattering, as well as trajectory modeling, display the relation between the observed layers with increased humidity
and the phenomena of convective overshooting of the tropopause, as a result of which cold and ozone-depleted air penetrates
into the lower stratosphere together with ice particles, which, rapidly sublimating, locally increase the water-vapor concentration.
A comparison of the humidity data obtained in West Africa in 2006 and in Central America in 2007 reveals substantial distinctions
in values and vertical structures of water vapor, both in the tropopause region and in the middle stratosphere. 相似文献
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V. V. Sterlyadkin E. V. Pashinov A. V. Kuzmin E. A. Sharkov 《Izvestiya Atmospheric and Oceanic Physics》2017,53(9):979-990
The existing radiometric methods for measuring the profile of the water-vapor concentration from spacecrafts are analyzed. Questions of the sensitivity of radiometric measurements to a deviation in the water-vapor concentration from the standard profile are considered. It is shown that the traditional measurements near absorption line 183 GHz have a low sensitivity to a change in the water-vapor concentration in the lower troposphere. A new differential method of humidity measurement in the lower troposphere has been proposed based on measurements near the 22-GHz line. The advantages of differential measurements near 22 GHz when compared to similar measurements in the vicinity of 183 GHz are confirmed by the results of computer simulation. 相似文献
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完善污染物扩散基本方程。结合多组分扩散理论针对湿度变化对气体污染物扩散的影响进行研究,通过对气体污染物迁移、转化的基本方程进行修正,得到在无边界大气条件下1个稳定污染点源连续排放的扩散模型,并对方程进行了简化和求解;通过变湿度气态物扩散特性试验装置,对不同湿度条件下气体扩散性质进行了试验确定。得到了湿度变化条件下气体污染物扩散的一般规律。 相似文献
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Filei A. A. Andreev A. I. Uspensky A. B. 《Izvestiya Atmospheric and Oceanic Physics》2021,57(12):1515-1526
Izvestiya, Atmospheric and Oceanic Physics - We consider the application of artificial neural networks for remote temperature and humidity profiles sounding of the atmosphere according to the data... 相似文献
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营口市位于辽宁省的中南部,面对渤海的辽东湾,背依鞍山市平原丘陵,东邻辽东崇山峻岭,西接盘锦市沿海平原,有辽河蜿蜒人海,海岸线绵延曲折。由于受海洋、河流的影响.营口市四季分明,气候宜人,蕴藏着丰富的滨海旅游资源,海蚀景观、地质珍迹、人文景观等资源各显异彩;尤其是海水浴场,条件极为优越,与国际上一流的海水浴场相比.毫不逊色,在某些特征上还稍胜一筹。 相似文献
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A. P. Tolstosheev 《Physical Oceanography》2009,19(6):358-365
A method for the estimation of the results of reconstruction of the trajectories of drifting buoys is proposed. It is based
on the comparison of the estimates of power spectral densities for the components of current velocity computed according to
three data sets: the data set of the coordinates of a drifting buoy with a built-in GPS receiver, the data set of coordinates formed on the basis of the first set but with data missing and observational errors
corresponding to the actual trajectory measurements by the Argos satellite location and data collection system by the Doppler method, and the data set of coordinates obtained as a result
of interpolation of the second set. As an example, we consider the procedure of realization of the proposed method and demonstrate
the efficiency of its application for the improvement of the reliability of reconstruction of the trajectories of drifting
buoys. 相似文献
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An attempt has been made to estimate the fishery potentials of the EEZ of India on the basis of data on primary and secondary production. The total column primary production and zooplankton production have been calculated to be 265·9 and 9 million tonnes of carbon per year, respectively. From these values the fishery potential has been estimated as 2·5 million tonnes per year. To this, if we add the estimated demersal fish catch, being 1·2 million tonnes per year, the total potential yield comes to 3·7 million tonnes per year. Since the present average total catch is about 1·6 million tonnes in a year, the fish catch could be doubled. 相似文献