大黄鱼性早熟问题的研究Ⅱ.不同药物对性早熟的影响

本文研究了促性腺激素释放激素类似物和紫萁两种药物对大黄鱼性早熟的影响。结果表明,在雌性,低和高剂量类似物组与低剂量紫萁组大黄鱼早熟率比对照组分别下降66％和33％,而高剂量紫萁组与对照组间没有差异;在雌必性,低剂量类似物组和低剂量紫萁组早熟率比对照组下降37％,高剂量紫萁组与对照组之间则没有差异。这些结果可为药物防止大黄鱼性早熟提供一条有效的途径。     

REGIONAL FEATURES OF LONG-TERM SST VARIATION IN THE WESTERN PACIFIC WARM POOL AREA

ＩＮＴＲＯＤＵＣＴＩＯＮＴｈｅＷｅｓｔｅｒｎＰａｃｉｆｉｃＷａｒｍＰｏｏｌ (ＷＰ)ｉｓａｓｅａａｒｅａｗｈｅｒｅｓｅａｓｕｒｆａｃｅｔｅｍｐｅｒａｔｕｒｅ (ＳＳＴ)ｉｓｔｈｅｈｉｇｈｅｓｔｉｎｔｈｅｇｌｏｂａｌｏｃｅａｎｓａｎｄａｉｒ ｓｅａｉｎｔｅｒａｃｔｉｏｎｉｓｔｈｅｍｏｓｔｖｉｏｌｅｎｔｉｎｔｈｅＰａｃｉｆｉｃ.Ｍａｎｙｒｅ ｃｅｎｔｒｅｓｅａｒｃｈｅｓｓｈｏｗｅｄｔｈａｔｖａｒｉａｔｉｏｎｓｉｎｔｈｅｔｈｅｒｍａｌｃｏｎｄｉｔｉｏｎｓ (ｉｎＳＳＴ ,ｅｓｐｅｃｉａｌｌｙ)ｏｆｔｈｅＷＰｐｌａｙ…     

Drying sewage sludge using flue gas from power plants in China

A lot of energy is required for drying the sewage sludge produced during the wastewater treatment process in China; however, on the other hand, the thermal energy in flue gas from power plants is usually wasted as it discharges into the atmosphere. In this study, a new technique for sludge drying is introduced. The key component of the new technique is equipment of a two-stage drying and granulation that utilizes thermal energy contained in the flue gas from power plants and extends sludge contact time with flue gas during the constant-rate evaporation stage. The primary results of the implementation in the Kangshun sludge treatment plant (daily treatment capacity of 100 tons of wet sludge) show that the new drying technique is very effective economically and environmentally. The water content in the sludge was reduced from 78% to less than 30%. The resulted sludge could be used either to co-incinerate with coal in a circulating fluidized bed or to mix with clay to make better bricks. Besides the saving in the direct heating cost in the sludge drying processes by 80%, the saving in fossil fuel consumption due to reuse of the dried sludge is also significant. As a result of the implementation of the new technique in a sludge treatment plant at the scale of the Kangshun plant, about 16,440 tons of CO₂ emission could also be reduced every year.     

Comparison between linear and nonlinear trends in NOAA-15 AMSU-A brightness temperatures during 1998–2010

Brightness temperature observations from Microwave Sounding Unit and Advanced Microwave Sounding Unit-A (AMSU-A) on board National Oceanic and Atmospheric Administration (NOAA) satellites have been widely utilized for estimating the global climate trend in the troposphere and stratosphere. A common approach for deriving the trend is?linear regression, which implicitly assumes the trend being a straight line over the whole length of a time series and is often highly sensitive to the data record length. This study explores a new adaptive and temporally local data analysis method—Ensemble Empirical Mode Decomposition (EEMD)—for estimating the global trends. In EEMD, a non-stationary time series is decomposed adaptively and locally into a sequence of amplitude-frequency modulated oscillatory components and a time-varying trend. The AMSU-A data from the NOAA-15 satellite over the time period from October 26, 1998 to August 7, 2010 are employed for this study. Using data over Amazon rainforest areas, it is shown that channel 3 is least sensitive to the orbital drift among four AMSU-A surface sensitive channels. The decadal trends of AMSU-A channel 3 and other eight channels in the troposphere and stratosphere are deduced and compared using both methods. It is shown that the decadal climate trends of most AMSU-A channels are nonlinear except for channels 3–4 in Northern Hemisphere only and channels 12–13. Although the decadal trend variation of the global average brightness temperature is no more than 0.2?K, the regional decadal trend variation could be more (less) than 3?K (?3?K) in high latitudes and over high terrains.     

十一运会各赛区气象灾害风险评估

利用山东省17个比赛城市1971—2007年8—10月的逐日气象资料,用统计方法对各种灾害性天气进行了风险评估。结果表明:十一运会期间有9种气象灾害,不同月份的气象灾害风险有差异,其风险等级由高到低依次为:8月雷电、暴雨、台风、大雾、冰雹、大雨、高温、大风;9月雷电、大雾、大风、暴雨、大雨、连阴雨、台风、高温和冰雹;10月大雨、大雾、大风、连阴雨、暴雨、高温、冰雹、台风。开幕式、闭幕式日发生上述气象灾害的概率很小。评估结果在十一运会气象保障中得到应用。     

CLIMATOLOGICAL CALCULATION OF SURFACE LATENT HEAT OVER CHINA

In the context of measurements from all the thermal balance stations over China,two methodsof calculating surface latent heat for its climatic features are proposed through experiments with arange of schemes,one being the empirical type based on the relationship between ground latent heatand vapor pressure,and the other upon the Bowen ratio parameterization.Either of them has itsunique merits so that they can be considered in specific case to have higher accuracy.On this basis.investigation is done of the feature of geographic distribution and annual variability of the heatacross the country.     

铝基柱撑蒙脱石的国内外研究进展

铝基柱撑蒙脱石作为一种新型的多孔材料是当前研究的热点之一。其具有大的比表面积，大小可调的孔径及强的化学活性而成为性能优异的吸附剂和催化剂。显示了其在石油化工和环保等领域的应用潜力。全面综述了当前铝基柱撑蒙脱石的制备。性能表征及其应用等方面的研究进展。     

时间域航空电磁电阻率和磁导率全时反演

为了减小时间域航空电磁法在强磁性地区应用时产生的磁极化电流对反演的影响,提出了一种在雅可比矩阵中加入磁导率偏导数,将电阻率、磁导率和层厚进行全时同步反演的方法。将磁性均匀半空间模型、单个磁性模型和多个磁性层模型的时间域响应添加高斯噪声作为模拟数据进行全时反演,得到的模型与理论模型拟合较好,拟合误差均在3%以下,验证了本文算法的有效性,说明在强磁性地区本文提出的算法能有效解决地下介质的电性分布。