Non - olatile random - access memory . a type of ram that retains its data een when the system is powered down . nram frequently consists of an sram and a long - life battery 非易失的随机访问存储器。一种能在系统关机的情况下保持它的数据的ram 。 nram常常由sram和长寿命电池组成。
Non - volatile random - access memory . a type of ram that retains its data even when the system is powered down . nvram frequently consists of an sram and a long - life battery 非易失的随机访问存储器。一种能在系统关机的情况下保持它的数据的ram 。 nvram常常由sram和长寿命电池组成。
Specifies that an address currently atop the evaluation stack might be volatile , and the results of reading that location cannot be cached or that multiple stores to that location cannot be suppressed 指定当前位于计算堆栈顶部的地址可以是易失的，并且读取该位置的结果不能被缓存，或者对该地址的多个存储区不能被取消。
Because global data that is stored in application state is volatile , it will be lost if the web server process containing it is destroyed , such as from a server crash , upgrade , or shutdown 因为在应用程序状态中存储的全局数据是易失的，所以如果包含这些数据的web服务器进程被损坏（如因服务器崩溃、升级或关闭而损坏） ，将丢失这些数据。
It is a orient - subject , integrating conformance gather and come into being by processing data in cleanout , change , loading . it supports integrate , uniform , accurate data for data mining . the data warehouse saves account message from customers and relation data of competitions 数据仓库是一个面向主题的，集成的，时变的，非易失的数据集合，它是将各种数据通过清洗、转换、装载过程而形成的，它为数据挖掘提供完整、统一、准确的数据。
Technique characteristics : incorporate transform with control , reduce assistant equipment ; can setup parameters through panel key in the work field , simplify for operating ; multi - switch quantity node output , fulfil the requirement under commonly controlling work - field ; all the configured parameter is saved in eerom ; adopt rs232 and rs485 communication mode 技术特点：集变送、控制为一体，减少辅助设备；现场即可通过面板按键设置参数，简单易操作；多点开关量输出，满足一般控制现场；所有设置参数都存储在非易失的存储器中；采用rs232 、 rs485通讯方式。
Thirdly , we need to build up database to keep the data for data mining , and based on the analysis of economic data warehouse , data table and the problems of data granularity , data partition and the structure of data warehouse , we set the star structure of regional macro economic analysis , and we design the fact table and dimension table for data warehouse . so we design and construct economic data warehouse and fulfill economic data entry , transfer , store and management 在这章中我们给出了一个关于pse的数据仓库属性的定义，即：数据仓库是一种来源于各种渠道的单一的、完整的、稳定的、集成的数据存储，这个储存的数据本质上是面向主题的、集成的、非易失的和可动态更新的，数据的逻辑形式是提供公式数据和组织数据。
