湘赣边境志留纪花岗岩岩石谱系单位特征及侵位机制探讨

湘赣边境中段出露有黄洋界、汤湖两处花岗岩超单元和同时期侵位的岩株、岩瘤，其成岩时代属志留纪，按其侵位构造、岩石组合、地球化学等特征，可建立5个岩石单元，归并为汤湖超单元。岩浆的侵位受区域性大断裂左旋剪切应力控制．空间上呈现由南东往北西逐渐变新的特点。     

电厂厂界噪声综合治理方案设计

分析了某电厂厂界噪声超标的原因，根据噪声源的噪声特性，提出了厂界噪声综合治理方案，对隔声墙进行了设计，并对效果进行了计算和预测。     

工业企业厂界噪声监测过程中有关问题的探讨

通过一些噪声监测实例来探讨有关工业企业厂界噪声测量中的有关问题,并提出了相应的改进方法和建议。     

Parasite transmission in a migratory multiple host system

A transmission model was devised for trichostrongyloid nematodes of saiga antelopes and domestic sheep in Kazakhstan. The framework extends previous models by including seasonal migration of saigas, contact with separate populations of sheep, and climate-driven stochasticity in herbage biomass and in the development, survival and migration onto herbage of free-living larvae. The model was parameterised for the contrasting life histories of Marshallagia, Haemonchus and Nematodirus, three important parasites of saigas and sheep in the region, and was successful at predicting broad qualitative patterns of infection dynamics in sheep and saigas. Parasite transmission between saigas and sheep was predicted to be most important for Marshallagia (from sheep to saigas in the south in winter, and onward transmission to sheep in the north in summer) and Haemonchus (from sheep in the north in summer via saigas to sheep further south in autumn). Model predictions for winter transmission of Marshallagia infection in saigas were consistent with field data, which showed that saigas culled before they have grazed the winter range carry lower burdens of this parasite than older animals. The model provides a mechanistic explanation for its predictions, which will assist hypothesis formation, and further the epidemiological basis of efforts to control parasite transmission between wildlife and livestock in both directions. A similar modelling approach could prove useful in other situations where detailed mechanistic models of parasite transmission are inappropriate in the face of parameter uncertainty and spatio-temporal variation in climate and host density. This is likely to include the majority of wildlife-parasite systems.     

沿岸熏烟扩散的中尺度模拟系统

建立了一个沿岸熏扩散的中尺度模拟系统，它由一个二维二阶矩闭合的ＰＢＬ模式和一个随机流动扩散模式组成。初步的模拟和一些数值试验结果表明，随机游动扩散模式与现行的基于高斯扩散公式的熏烟扩散模式比较，其物理模型更为合理；采用二阶矩湍流闭合方案的ＰＢＬ模式能模拟得到合理的热力内边界层（ＴＩＢＬ）结构特征，将二阶矩湍流闭合ＰＢＬ模式模拟所得气象场作为随机游动扩散模式的气象输入，可以较好地预测沿岸地区日间持续     

工业企业厂界噪声监测过程中有关问题的探讨

通过一些噪声监测实例来探讨有关工业企业厂界噪声测量中的有关问题，并提出了相应的改进方法和建议。     

Turbulence closure models and their application in RAMS

Turbulence closures are fundamental for modelling the atmospheric diffusion in numerical codes and the resulting eddy diffusivities are key parameters in describing the transport and dispersion in the boundary layer. In this work, four turbulence closure schemes have been applied for reproducing a neutral flow over schematic complex terrain using the meteorological model RAMS. Two of the closures, a one-equation (E-l) and a two-equations (E-) model, have been implemented in RAMS in alternative to the ones originally available. In these cases, an analytical method based on the similarity theory for the atmospheric surface layer and boundary layer is adopted to calculate the empirical constants of the turbulence closures. Some examples of numerical studies performed to simulate the flow and turbulence over a 3-D hill in wind-tunnel experiment in neutral stratification are presented and discussed. An intercomparison of simulations related to different closures is considered by analysing the main features of the flow over the hill and by comparing calculated vertical profiles of turbulent kinetic energy with measured ones.     

Comparison of dynamic subgrid-scale models for simulations of neutrally buoyant shear-driven atmospheric boundary layer flows

Several non-dynamic, scale-invariant, and scale-dependent dynamic subgrid-scale (SGS) models are utilized in large-eddy simulations of shear-driven neutral atmospheric boundary layer (ABL) flows. The popular Smagorinsky closure and an alternative closure based on Kolmogorov’s scaling hypothesis are used as SGS base models. Our results show that, in the context of neutral ABL regime, the dynamic modeling approach is extremely useful, and reproduces several establised results (e.g., the surface layer similarity theory) with fidelity. The scale-dependence framework, in general, improves the near-surface statistics from the Smagorinsky model-based simulations. We also note that the local averaging-based dynamic SGS models perform significantly better than their planar averaging-based counterparts. Lastly, we find more or less consistent superiority of the Smagorinsky-based SGS models (over the corresponding Kolmogorov’s scaling hypothesis-based SGS models) for predicting the inertial range scaling of spectra.     

云南阳宗海沉积物-水界面铁、锰、硫的循环特征

阳宗海是一季节性含氧湖泊，是云南宜良的水源地。对阳宗海沉积物中铁、锰、硫的分布特征进行了分析，说明阳宗海沉积物早期成岩过程中铁、锰的循环受到氧化还原边界层和沉积物-水界面的双重控制。湖泊中铁、锰围绕着沉积物-水界面形成循环。有机质降解是这一过程的主要驱动力。在水体含氧性较好时，铁、锰循环导致沉积物表层铁、锰的富集；在水体含氧性较差时，铁、锰由沉积物大量释放进入上覆水体中，从而导致水体浓度增大。锰的氧化还原循环比铁激烈，铁的循环还受到硫酸盐还原的制约。锰指标不能指示沉积物氧化还原环境的变化；而输入沉积物中的铁绝大部分都保存于沉积物中，所以铁指标可以很好地来指示沉积物的氧化还原环境，具有良好的示踪价值。