始态

若在一过程中，体系的终态和始态相同，则称此过程为循环过程。

A process in which the final state of the system is the same as the initial state is called a cyclic process .

始态可概括为源区、源岩、库岩、矿源层和剥蚀区等，终态可以概括为矿带、矿田和矿床等多个等级体制。

The initial state can be summarized as source region , source rock , reservoir rock , source bed , a denudation area , etc.

成矿系统的始态、终态及其过程

Preliminary Study of Initial State , Terminal State , and Process of Ore-forming System

结果表明：风化岩体是岩土系统物能流信源体，主要反映为物源始态差异；

The analysis shows that the weathering rock is the information source of material and energy flows , and mainly shows the original difference of material .

本文根据等熵过程始态、终态熵相等的原则，提出了一个计算往复活塞压缩机等熵过程理论循环功的精确计算方法，应用该方法可以提高压缩机效率的计算精度。

Based on the principle that entropy do not change in isentropic process , this paper presents a precise method to calculate isentropic process periodic work of compressors , and advances the calculation precision of compressor efficiency .