Methods The species and breeding characters of vectors were investigated in September,2004,the density of the larva was calculated by Breteau index,thousand-person index and container index.

White and yellow-fever mosquitoes were caught to isolate dengue viruses,and Breteau Index of the media was evaluated.

Methods The species and breeding of vector were investigated and the density was caculated by Breteau index in 2001.

Combining with the present situation of investment fund in China, using the investment fund performance evaluation research at home and abroad as the reference, adopting indexes such Shape, Treyner, Jesen, it evaluates the performance of investment funds in China in three aspects, and makes a case analysis on the ten representative funds in China.

The commonly used appraisal indexes of risk and benefit of open-ended funds including Sharpe index,Treynor index and Jensen index.

Used the interpolation to obtain the droplet the diameter distribution map and calculated the droplet diameters distribution index.

Terrain niche index was used to describe the regional terrain difference and nondimensio-nal distribution index was used to quantitatively analyze the spatial distribution characteristics based on the spatial information of landscape components.

The terrain factors(elevation,slope and aspect) and distribution index was overlapped to quantitatively analyse the region soil erosion,which could study the soil erosion spatial distribution from terrains factors(elevation,slope and aspect).

A Bayesian analysis for non-failure data of exponential distribution;

Γ-minimax estimation for exponential distribution parameter;

Censored SPOT method for reliability index verification under exponential distribution;