中国葡萄气候区划探讨

根据葡萄的生物学特性及其对气候条件的要求,在全国范围内选取８３个站点,按照９个农业气候指标,利用模糊聚类的数学方法,将全国划分为６个不同的葡萄气候区,并就各区的气候特点和品种选择作出分区评述。     

Main features of regional circulation variation during onset of the south china sea monsoon in 1998

1.IntroductionTheAsiansummermonsoonconsistsoftwosystems,i.e.,theSouthAsianmonsoonandtheEastAsianmonsoon.TheSouthChinaSea(SCS)monsoonisoneoftheimportantsubsystemsoftheEastAsianmonsoon.IthaslongbeenconcernedabouttherelationshipoftheSCSmonsoonwithchangesofthegeneralcirculationandweatherpatternsinadjacentregions.TaoandChen(1987)suggestedthattheonsetoftheAsiansummermonsoonstartsfirstinthenorthernSCSusuallyinmid--May,thenpropagatesnorthwardtothemainlandofChinaandthewesternPacificsouthofJap…     

河南省空中水汽资源的来源、分布及收支

利用1971-2005年河南省及其临近地区NCEP/NCAR月平均再分析资料和同期降水观测资料,分析了河南省空中水汽来源、水汽资源的时空分布、水汽输送特征以及河南省域水汽收支状况.结果表明:不同季节水汽来源、水汽通量强度及其随高度的分布、水汽通量散度等特征有相当大的差异;河南省空中年水汽含量平均值为25.79 mm,水...     

上海地区雨水酸度与天气背景的关系

1981—1983年在上海地区11个观测站进行了雨水pH值观测,取到资料2448份.从资料分析得到:(1)雨水pH值与天气背景有关,静止锋天气影响时,酸雨出现几率达44.5％,雨水较酸;暖锋天气时,酸雨出现几率仅9％.(2)台风、高压边缘天气影响下,酸雨的形成主要是受局地污染源的影响;但静止锋、冷锋、低压系统天气时,酸雨的形成不仅受局地污染源的影响,而且还可能受随气流输送来的外来污染物的影响.     

A Closure Study of Aerosol Hygroscopic Growth Factor during the 2006 Pearl River Delta Campaign

Measurements of aerosol physical, chemical and optical parameters were carried out in Guangzhou, China from 1 July to 31 July 2006 during the Pearl River Delta Campaign. The dry aerosol scattering coefficient was measured using an integrating nephelometer and the aerosol scattering coefficient for wet conditions was determined by subtracting the sum of the aerosol absorption coefficient, gas scattering coefficient and gas absorption coefficient from the atmospheric extinction coefficient. Following this, the aerosol hygroscopic growth factor, f(RH), was calculated as the ratio of wet and dry aerosol scattering coefficients. Measurements of size-resolved chemical composition, relative humidity (RH), and published functional relationships between particle chemical composition and water uptake were likewise used to find the aerosol scattering coefficients in wet and dry conditions using Mie theory for internally- or externally-mixed particle species [(NH₄)₂SO₄, NH₄NO₃, NaCl, POM, EC and residue]. Closure was obtained by comparing the measured f(RH) values from the nephelometer and other in situ optical instruments with those computed from chemical composition and thermodynamics. Results show that the model can represent the observed f(RH) and is appropriate for use as a component in other higher-order models.     

成都地区中长期天气预报系统简介

介绍成都地区中长期天气预报系统界面的设置、系 统所运用的 六种中长期预报方法的编程要点。六种方法包括；周期分析，利用正交变换二次判别方法 ，多元回归方程，相关，相似与阴阳历叠加。     

加强生态环境保护 促进湛江珍珠养殖业持续发展

为促进湛江珍珠养殖业的持续发展,各级政府和海域管理部门应认真贯彻执行国家有关海域管理的法律法规,加强海域环境保护的宣传教育工作,提高养殖者的环境保护意识。珍珠养殖者要创新养殖方式,拓展新的养殖空间,尊重自然规律,自觉保护海洋生态环境,以解决湛江珍珠养殖业存在的养殖海域无证使用、无度开发、生态功能丧失等问题。     

An internal-external optimized convolutional neural network for arbitrary orientated object detection from optical remote sensing images

Due to the bird's eye view of remote sensing sensors, the orientational information of an object is a key factor that has to be considered in object detection. ...     

Integrated indicators-based gradation of cultivated land quality in mountainous region of Southwestern China

1 Introduction The gradation of cultivated land is to assess the suitability of cultivated land for agricultural production in terms of natural and economic prop-erties of land (Feng et al. 2004). It can be used to evaluate sustainability of land use and …     

Characterization of the mechanical properties of a claystone by nano-indentation and homogenization

Based on the analyses of mineralogical compositions by X-ray diffraction and microstructure by optical microscopy, the Young’ modulus and hardness of a claystone were characterized by the nano-indentation technique and homogenization method. Three distinct microstructural zones are identified in the claystone: clay matrix, a composite matrix of clay and small mineral grains and imbedded quartz grains. The elastic modulus and hardness of different zones were determined by nano-indentation testing. Based on the statistical analysis of nano-indentation results, the spatial mappings and frequency distributions of elastic modulus and hardness of the different zones were obtained. The elastic moduli of main constituent phases of the claystone are then estimated from the nano-indentation tests. These values were further used for the determination of the macroscopic elastic modulus of the claystone using two different homogenization schemes: the dilute scheme and Mori–Tanaka scheme. The predicted values by the homogenization schemes are compared with experimental data obtained from conventional uniaxial compression tests.