山岳旅游景区旅游扶贫模式探析——基于对伏牛山重渡沟景区田野调查的思考

伏牛山重渡沟景区发展具有典型示范性,探讨重渡沟景区旅游扶贫机制和发展路径,分析其存在的问题和未来发展策略,既有助于旅游扶贫理论研究的深入,也可以促进旅游扶贫实践的科学发展;通过实地调研掌握一手资料,采用企业经济分析的理论方法,揭示了重渡沟景区经济利益主体间的合作博弈图景.研究表明:伏牛山重渡沟景区旅游扶贫模式的独特之处在于景区公司+农户的互补型旅游企业共同体的组织形式、旅游公司对农家宾馆的垄断管理和一体化的经营机制、旅游公司与社区合作博弈中政府的制度保障和约束作用的发挥等;结论是农户深度参与景区旅游企业经营体系,保证社区居民旅游受益最大化,是旅游扶贫成功的关键.     

归一化定量技术在激光烧蚀-等离子体质谱测定石榴子石多元素中有关问题的讨论

讨论了采用相对灵敏度系数进行多外标归一校正的可行性。该校正方法应用于激光烧蚀-等离子体质谱同时分析了未知石榴子石样品中主、次、痕量共43个元素,并与内标法结果进行对比,其一致性令人满意。探讨了激光线扫描和单点剥蚀两种取样方式下,相对灵敏度系数间的变化关系,结果表明,在剥蚀深度基本一致的情况下,取样方式对相对灵敏度系数没有显著影响。     

云南腾冲地区地热流体的地球化学特征

对云南热海和瑞滇地区地热流体的地球化学特征进行了分析和探讨,并据此评估了地热流体对环境的影响.结果显示,研究区的碱性热泉中K、Na、F、Cl、SiO_2的含量高,而只存在于热海地区的酸性热泉中SO_4~(2-)、Mn、Fe的含量高.热泉中As、Sb的含量范围分别在43.6～687μg/L和0.38～23.8 μg/L之间.热泉中以As(Ⅲ)为主,占了总砷的91%.地热流体中的As、Sb一部分被固定在泉华中,而另一部分则释放到了环境中,从而进入地下水和下游的田地中,对当地居民的健康造成威胁.     

江苏省县域人口长寿水平空间差异与成因探索

基于我国第五、六次全国人口普查数据,利用3种人口统计方法进行了江苏省县域尺度人口长寿水平空间度量,并设计了改进的统计方法;借助GIS工具对县域长寿水平进行了聚类分析,研究了江苏省县域人口长寿水平与经济发展的关系.结果 表明:①预期寿命法与老龄死亡率法存在很强的空间一致性,表现为苏南地区人口长寿水平显著高于苏北地区,但长...     

Hot springs mediate spatial exchange of heat and mass in the enclosed sediment domain: A stability perspective

In many natural environments, such as in underwater hot springs and hydrothermal vents, thermal gradients are accompanied with changes in the concentration of chemical compounds transported to the seawater, causing the so-called double-diffusive, mixed convection. To study the physical scenarios in such systems, a vertical channel filled with a porous medium saturated with saline water is considered. The motion in the sediment-filled channel is induced by two buoyancy forces and an external pressure gradient, similar to the situation in a vent with an upward flow direction. The fluid flow has been modeled by an extended Darcy model, and the flow instability mechanisms have been studied numerically. The linear stability analysis is performed considering a wide range of Darcy number (Da = 10⁻⁵ -10⁻⁸). The instability boundary curve showed three distinct dynamic regimes: (i) Rayleigh-Taylor (R-T), (ii) log-log non-linear variation, and (iii) log-log linear variation. The domain of different regimes were sensitive to external pressure gradient as well as permeability. Similar to cross-diffusive natural convection in pure viscous fluids, a linear relationship between logarithmic absolute values of critical thermal Rayleigh number (∣Ra_T∣) and solute Rayleigh number (Ra_C) is found in the third regime. Based on the permeability, for any solute Rayleigh number (Ra_C), there existed a minimum value of Reynolds number (Re), below which R-T type of instability appeared. Above this minimum value, the instability was due to two buoyancy forces, known as buoyant instability. Simulations of secondary flow via energy analysis demonstrated the development of complex dynamics at the critical state in all three regimes characterized by transition of multi to uni-cellular structures and vice verse.     

贵州-广西地区寒武纪重晶石形成条件探讨

通过分析对比前人在黔桂地区寒武纪重晶石方面的研究资料,结合区域构造运动、沉积展布和演化特征,对寒武纪大型重晶石矿床的形成背景和条件进行了研究,认为寒武纪地层的重晶石矿热液沉积成因和生物沉积成因并不是对立的,海底热液不是由火山喷发而是通过深大断裂连接的岩浆形成海底的局部热点形成的.在谊区构造、火山运动整体较弱的背景下,热...     

Development and application of antibody microarray for white spot syndrome virus detection in shrimp

Detecting white spot syndrome virus (WSSV) in shrimp in high efficiency and veracity is important for disease prevention in aquaculture. Antibody-based microarray is a novel proteomic technology that can meet the requirements. In this study, we developed an antibody microarray for WSSV-detection in a specific and parallel way at multiple samples. First, seven slides each with different modifications were characterized by atomic force microscope, and were compared in the efficiency of immobilizing proteins. Of the seven, 3-dimensional structured agarose gel-modified slides were chosen appropriate for the microarray for having higher signal value and superior spot size. A purified rabbit anti-WSSV antibody was arrayed as the capture antibody of the microarray on the agarose gel-modified slides, and then the microarray slides were incubated in the tissue homogenate of sampled shrimp and the antibody-antigen complex was detected by Cy3-conjugated anti-WSSV monoclonal antibody. The results were measured by a laser chipscanner and analyzed with software. To obtain satisfied fluorescence signal intensity, optimal conditions were searched. The detection limit of the antibody microarray for WSSV is 0.62 μg/mL, with a proven long shelf life for 6 months at 4°C or 8 months at -20°C. Furthermore, concordance between antibody microarray and traditional indirect ELISA reached 100% for WSSV detection. These results suggest that the antibody microarray could be served as an effective tool for diagnostic and epidemiological studies of WSSV.     

应用主分量分析法研究唐山Ms7.8地震前的地磁异常

应用主分量分析法对昌黎、青光、宝坻、红山等台站(1975—1977年)三年的每月五个静日地磁绝对磁场的资料及相应时间的太阳黑子相对数的资料进行计算。结果表明,第一主分量与太阳黑子相对数对应很好,相关系数为0.9以上,而第二主分量与太阳黑子相对数的相关系数为0.03左右。对于在某一固定频率而变化的地磁外源场,内外场的比例几乎恒定在一定水平上,而在唐山地震前内外场比值有明显的异常变化,笔者认为,这个恒定水平的偏离可能是由于地壳内应力不断积累导致的地下电导率的变化而引起的。用这种方法不仅可以消除地磁场的非局部变化,而且利用内外场比值的偏离或监视内场的变化可能为使用地磁场预报地震提供一个依据。     

科马提岩成因研究述评

科马提岩仅限于超镁铁质熔融体(Mgo>30wt%)所生成的火山岩.它具有高温、高密度和低粘度的特征.以及独特的地球化学性质.结合高压熔融实验成果,评述了有关科马提岩成因的干地幔熔融模式、湿地幔熔融模式、温超镁铁质板块俯冲模式和热地幔柱熔融模式,并认为热地幔柱熔融模式较好地解释了科马提岩的成因.     

厦门的旅游气候资源

本文介绍了厦门的气候和不舒适指数，认为厦门全年均可开展旅游活动，但其优势在秋冬季，在改善旅游环境中提出在夏季进行空调起止日期，并计算了凉房度热日。