共查询到20条相似文献，搜索用时 31 毫秒
1.
2.
紫外线强度指数监测和控制系统 总被引：2，自引：0，他引：2
根据单片机原理和计算机通信技术，采用ATML89C51、ADC0809等芯片微控制器和集成电路、紫外辐射宽波段传感器，结合计算机串口通讯技术，设计出实用的紫外线强度指数监测和控制系统。该系统可自动采集紫外线强度指数数据，进行历史数据库的分析和查询，研究该地区紫外线强度的变化规律。 相似文献
3.
根据单片机原理和计算机通信技术,采用ATML89C51、ADC0809等芯片微控制器和集成电路、紫外辐射宽波段传感器,结合计算机串口通讯技术,设计出实用的紫外线强度指数监测和控制系统.该系统可自动采集紫外线强度指数数据,进行历史数据库的分析和查询,研究该地区紫外线强度的变化规律. 相似文献
4.
紫外线是太阳辐射中波长在（5～400）nm之间的电磁波，根据波长大小，紫外线辐射又分为紫外线A、B、C三个波段。紫外线A的波长在（320～400）nm之间，紫外线B的波长在（290～320）nm之间，紫外线C的波长在（5-290）nm之间。 相似文献
5.
两种太阳紫外线辐射监测仪的对比观测 总被引：2，自引：0，他引：2
应用上海气科所SUR—1太阳紫外线辐射强度监测仪和美国EPPLY公司TUVR宽波段紫外线总辐射计在南宁进行对比观测，观测结果表明：SUR—1仪观测值比TUVR仪观测值明显偏小。两种仪器观测值相关系数高达0．98，可以从一种仪器的观测比较准确地估算出另一种仪器的观测值。该分析结果为采用不同紫外观测仪城市进行紫外观测对比具有一定意义，并可为准备购置紫外观测仪器的城市提供技术参考。 相似文献
6.
拉萨紫外线指数预报方法 总被引：10，自引：0，他引：10
依据拉萨地区不同月份紫外辐射占全波段太阳总辐射的比例关系和全波段太阳总辐射的气候学计算方法，提出了一套紫外线指数统计预报方法，经实际观测资料验证，该方法具有较好的适应性和一定的准确度。 相似文献
7.
1引言人们意识到环境的变化直接威胁着人类的健康,迫切需要掌握同自己生活密切相关的环境变化,以便采取相应的措施对生物及人类进行保护。紫外线辐射可能导致人体皮肤、眼睛受损,免疫力下降,对人类的健康造成严重的威胁。紫外线指数的预报能指导人们在日常生活中采取有效的方法来保护自己。2紫外线指数标准紫外线(U V)辐射是太阳辐射光谱中100～400nm间的范围,按照紫外线的不同波段可分为3部分:紫外线A段(U V-A):波长为320～400nm,对生物作用弱。紫外线B段(U V-B):波长为290～320nm,对人体影响较大。紫外线C段(U V-C):波长为100～290n… 相似文献
8.
北京地区紫外线观测与预报系统 总被引：17，自引：5，他引：17
通过对1999－2000年紫外线观测资料的分析，得出紫外线强度与天顶距、总云量、低云量有很好的关系，并利用1999－2000年紫外线强度的观测资料和同期气象资料，利用统计学方法研制了紫外线强度预报方法，并建立了紫外线预报服务系统。 相似文献
9.
设计开发了一种太阳紫外线探测系统。该系统分为紫外线传感器、A/D采集模块、单片机处理模块、DZZ1-2数据处理中心以及计算机监控中心等5部分。高精度和高稳定性的探测传感器,能够感应UVA、UVB两个波段的紫外线并且产生电压信号传输到采集模块。单片机处理模块利用采集到的紫外线信号电压计算紫外线强度并且根据气象行业标准对结果进行统计和记录。数据处理中心可以控制多个单片机模块,具有了良好的扩展性和兼容性,并且利用液晶面板和软键盘方便现场操作和参数设置。计算机监控中心使用户能够远程获取探测数据并且遥控探测现场仪器。最后给出了探测系统运行的部分分析结果。本紫外线探测系统具有运行稳定,遥控以及遥测操作便利等优点。 相似文献
10.
采用2004年南宁紫外线实测资料，对这3种紫外线日值标准进行对比分析，以评价各种标准的优劣，分析内容包括数值差异、日最大值出现在日值所在时间段天数差异、日值时间段内累计紫外线辐射量占全天累计紫外线辐射量差异。 相似文献
11.
12.
13.
本文讨论了3cm天气雷达在兰州地区定量测量降水及其精度;分析了不同降水类型和衰减等对测量的影响;讨论了地面雨量计订正雷达测量值的方法和效果。 相似文献
14.
15.
Within the frame of the ESCOMPTE program, a spatial emission inventory and an emission database aimed at tropospheric photochemistry intercomparison modeling has been developed under the scientific supervision of the LPCA with the help of the regional coordination of Air Quality network AIRMARAIX. This inventory has been established for all categories of sources (stationary, mobile and biogenic sources) over a domain of 19,600 km2 centered on the cities of Marseilles–Aix-en-Provence in the southeastern part of France with a spatial resolution of 1 km2. A yearly inventory for 1999 has been established, and hourly emission inventories for 23 days of June and July 2000 and 2001, corresponding to the intensive measurement periods, have been produced. The 104 chemical species in the inventory have been selected to be relevant with respect to photochemistry modeling according to available data. The entire list of species in the inventory numbers 216 which will allow other future applications of this database. This database is presently the most detailed and complete regional emission database in France. In addition, the database structure and the emission calculation modules have been designed to ensure a better sustainability and upgradeability, being provided with appropriate maintenance software. The general organization and method is summarized and the results obtained for both yearly and hourly emissions are detailed and discussed. Some comparisons have been performed with the existing results in this region to ensure the congruency of the results. This leads to confirm the relevance and the consistency of the ESCOMPTE emission inventory. 相似文献
16.
DMS oxidation in the marine boundary layer has been simulated with a mesoscale meteorological model including detailed physical parameterizations. The impact of vertical turbulent transport on the DMS and SO2 diurnal cycles with and without in-cloud SO2 oxidation has been studied in a one-dimensional version of the model and compared to results obtained with a zero-dimensional box model. Initialisation has been done using balanced values issued from the imposed sea-air fluxes, dry deposition fluxes and chemical source/sink terms. Particular emphasis has been put on the important role played by evolving vertical mixing in the marine boundary layer. 相似文献
17.
倒春寒的划分和预报服务探讨 总被引：3，自引：0，他引：3
本文利用预报区域1960～1995年春季逐日气象资料,分析得到了倒春寒天气的客观划分标准、气候特点、主要影响系统及其形势特征。采用较新特色的折扣回归模型,建立了三、四月份各旬倒春寒的集成预报方程;利用短期预报资料,研制出若干预报判据和消空指标,建立了短期预报回归方程,并编制出具有一定特色的预报服务系统。经1997年实际应用,倒春寒天气的预报准确率在经验预报的基础上提高20％左右。 相似文献
18.
Wang Mingxing 《大气科学进展》1985,2(4):469-477
The statistical basis for factor analysis is briefly discussed. A method combining common factor analysis with orthogonal transformation has been proposed and discussed in detail. The method has been tested with a data set consisting of 16 elemental concentrations in 40 samples collected at the Beijing meteorological tower, March 1980. Seven sources-soil+coal fly ash, sulfate, cement and lime dust, oil, plant burning, motor, and marine aerosol-corresponding to the first seven factors have been identified. The source profiles and their contributions have been obtained. 相似文献
19.
我国月降水和气温网格点资料的处理和分析 总被引：14，自引：2，他引：14
用逐步搜索逼近法的客观分析技术计算出１９５１－１９９２年中国月降水量和月平均气温的格点资料，并利用图象识别原理对格点值和站点观测值进行了比较。 相似文献
20.
《Dynamics of Atmospheres and Oceans》2004,38(1):1-37
The structure of geostrophic flows that are formed from smooth initial unbalanced data with zero or uniform potential vorticity has been investigated in the work. Using methods of the theory of complex-variable functions, a class of exact analytical solutions describing these flows has been constructed. It has been shown that if the amplitude of a smooth initial disturbance exceeds the critical one, the final state will contain discontinuities of frontal type. A closed system of equations for discontinuity surfaces determination in the final states has been formulated. This system includes the Margules formula as a condition at the jump. It has been established that geometric configurations of discontinuity surfaces have an universal character, i.e. they do not depend on the details of initial distributions. To describe the nonstationary wave-processes of adjustment, a numerical hydrostatic model and a simplified analytical model based on the linearized dynamic equations in the Lagrange variables have been proposed. It has been shown that the establishment of discontinuious geostrophic flows has a clearly defined wave character with the alternations of smooth and multivalued phases. At the initial rather short interval, these phases are repeated with the inertial period, i.e. a nonstationary oscillatory front is formed. 相似文献