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Based on our reduction of the ASCA observational data and fittings of the low and medium energy X-ray spectra, we combine the ASCA and BeppoSAX observed PG QSOs to form a sample for statistics of the spectral features on the X-ray spectra.

从处理ASCA观测数据和分析X射线谱出发,将有ASCA和BeppoSAX观测结果的PG类星体构成一个样本,对它们的中、低能X射线谱上的观测特征进行统计。

Based on the observation data from the date of embedment of instruments settlement to the end of 1999,the characteristic values and the regularities of the observed variations are analysed.

文中根据观测仪器从埋设至1999年的观测资料,分析了各观测物理量的特征值、变化规律和变化趋势。

It is important to suitably estimate the root mean square of observation error in a given assimilation system.

在观测资料同化系统中,观测误差均方差与背景场误差均方差共同决定着观测信息与背景场信息的相对重要性以及这些信息在空间及不同变量间的扩展方式,故在资料同化系统中起到决定性作用。

Before preloading, a lot of extensometers, inclinometers, piezometer tips and settlement plates were installed. The deformation and pore pressure of ground were observed during preloading; Three years'creep settlements were monitored under the maximum preloading load so as to provide the field data for the new model.

预压前在地基中埋设了沉降标、深层沉降管、测斜管、孔隙水压力计等土工观测仪器,堆土预压过程中对地基的变形和孔隙水压力进行全面观测,以及预压后长达3年的流变观测,为模型的工程验证提供了实测资料。

Eventually, propinquity of spacecraft to the Sun plus improvements of space solar telescopes in spatial, temporal and frequency domains may allow such space solar telescopes to take over completely, perhaps adding to observations of distant stellar coronas to explain the coronal-heating problem.

最终,太阳观测卫星直接抵近观测并且会有先进的空间望远镜加入这个队伍,以后空间太阳望远镜将完全承担任务,然而对远距离星体日冕的观测同样也能解释日冕加热的问题。

The CO2 uptake rate of plants is affected by the plant species and environmental conditions such as photosynthetically active radiation, temperature, water and nutrient contents. PAR is the most immediate environmental control on photosynthesis while air temperature affects both photorespiration and dark respiration. In the natural condition, PAR and temperature play an important role in net CO2 uptake. The effects of PAR and air temperature on the CO2 uptake of Pterocarpus macrocarpus grown in a natural habitat were studied in the present work. Due to many uncontrollable factors, a simple rectangular hyperbola could not represent the measured data. The data were divided into groups of 2℃ intervals; CO2 uptake in each group may then be related to PAR by a rectangular hyperbola function. Using the obtained functions, the effect of PAR was removed from the original data.

用涡度相关法对亚热带红壤丘陵区人工针叶林的二氧化碳、水、热通量进行了观测,重点分析了23m、39m两层高度的观测结果,同时把观测期分为春季和冬季两个不同时间段作了对比:结果表明,不管冬季还是春季,39m高度所测的总通量值和夜间通量值都要小于23m的观测值,这种通量差别表明:23m高度的观测结果更接近当地生态系统与大气之间的通量交换值,在此种生态类型条件下用涡度相关法测碳通量时,在23m、39m两层高度之间仍然存在大气平流现象;该试验区植被在冬季仍然可以进行光合作用,而且光合作用所吸收的CO2大于呼吸作用所排放的CO2,因此该种生态系统在冬季仍表现为碳汇;春季的碳通量值为冬季的2倍以上。

The relations between prediction accuracy and prediction models, observable arc and the sampling datum for short- and long-term prediction are computed and analyzed, using the running data of different type satellite clocks in continuous and incontinuous measurement status.

讨论了原子钟时间预报模型,针对三种不同类型的GPS卫星钟,在连续观测和不连续观测两种情况下,计算分析了短期预报和长期预报中预报方法、可观测弧段和采用数据量与预报精度的关系。

The research conducted in the station included atmospheric boundary layer research including radiation and soil ob- servation, atmospheric turbulence and radiation system research, wind temperature profile research, radiosonde ob- servation research, sand and dust storm observation, glacier change observation, environmental study of surface process and geodynamic research.

为开展高喜马拉雅地区地质构造一气候反馈作用的研究,中国科学院青藏高原研究所于2004年开始在珠峰地区建立了综合观测研究站,并于2004年下半年开始相继开展了大气边界层、大气湍流和辐射系统、风温廓线、无线电探空系统、沙尘暴观测、冰川变化等大气科学观测研究、地表过程的环境研究和地球动力学研究。

After many times of embedments and observations for upward rock deformation observation instrument , defects for upward rock deforma tion observation instrument during grouting and improvement are discussed .

摘 要:在进行多次岩石抬动变形观测装置的埋设和观测之后,对灌浆施工过程中,岩石抬动变形观测装置在实际中存在的缺陷及改进措施作了探讨。

Objects considered difficult or impossible to see will now be discerned at first glance, and fainter specters will have taken their place.

一些被认为是极难观测或是无法观测到的天体会在第一次观测中被识别出来,一些暗弱的影像也会出现在视场中。

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