compatibility forward; upward compatibility是什么意思

用法例句

An Optimized Bottom-Up Time Series Segmentation Algorithm;

一种优化的自底向上时间序列分段算法

This paper proposes the method of monitoring the k-nearest neighbors,which adopts a predicted-speed policy and a bottom-up update R-tree index with an update firstly stored in memory.

在时间-距离空间基础上,提出监测第k个最近邻的方法,采取了速度更新预测策略及更新预留内存的自底向上更新的R-树索引结构。

In structural analysis,according to the layout structure of the symbols within the expressions,a method of structural analysis of mathematical expressions which connects the method of "Top-Down" with the way of "Bottom-Up" is applied.

在公式字符识别中,采用了一些适用于公式字符的特殊处理方法;在结构分析中,根据数学公式的结构布局,采用了一种将“自顶向下”和“自底向上”策略相结合的数学公式结构分析方法,实现了数学公式的重用,实验表明,这种方法能取得较好的识别效果。

A series of methods including plane butting vertical-up welding, welding arc physical observation, etc.

采用平板对接立向上焊接、焊接电弧物理观察等试验方法 ,观察了碱性渣系气体保护药芯焊丝熔滴过渡和电弧特性 ,研究了立向上焊焊缝成形机理及影响因素。

Study on the penetration depth in the gas-solid fluidized bed, including vertical jet and horizontal jet, was reviewed in the near past thirty years.

综述了近三十年来流化床中垂直向上射流、水平射流射流深度的研究状况，结合笔者在多环隙气速、混合物组分射流深度的一系列研究结果，详细论述了射流深度的测试方法、影响因素（射流气速、固体颗粒物性、床层操作压力、环隙气量、放大效应），同时对诸多射流深度关联式进行了分析，指出了应注意的问题。

Based on experimental and theoretical analysis, a new viewpoint of which a comound curling chip is easier to break than a up curling chip or if the degree of side curling is higher than that of up curling in the compound curling it is aslo easier to break than a side curling chip has been put forth in this paper,and the conditions of producing the compound culing chip have been investigated.

在试验和理论分析的基础上，本文提出了复合卷曲的切屑比向上卷曲的切屑、当侧卷程度较大时比例向卷曲的切屑易于折断的观点，并且讨论了切屑产生复合卷曲及侧向卷曲的条件，这些对断屑槽的设计和使用有重要意义。