Taking the issue of how to carry out document-based management of files at universities and colleges as the subject,this paper elaborates from five aspects: the meaning of "piece-setting" regulation,the range of "piece-setting", the definition of "piece",the classification of "piece",and its arranging number.

Effects of site conditions and cultivation on growth of sawtooth oak plantations;

Preliminary study on the relationship between site conditions and the density and fiber conformation of Phyllostachy pubescens;

The impaction of climate and site condition on the growth and fruiting of Chinese chestnut;

In this paper,we give the concept of conditional independence by conditional probability and obtain some properties of conditional independence.

We propose the concept of conditional independence between the estimators of the regression parameter and the unknown variance.

The identifiability for causal effects under a type of assumptions based on conditional independence in a causal model is treated by equation method.

Though studying some concepts and formulas in theory of probability,we give the definition of conditional independent between two random events and the formula probability in complete events set,and a simplified formula for density s function in n random variables is given.

With model 1, it is assumed that xi,(i= 1,2) is conditional independent under θi(i=1,2).

Effects of site conditions on growth and wood quality of Mytilaria laosensis plantations;

This paper investigates the growth status of the Holoxylon ammodendron, Tamarix and Calligonum planted under the different site conditions for t.