alternate key

alternate key的基本解释

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备用关键字, 替代关键字

与alternate key相关的网络例句 [注：此内容来源于网络，仅供参考]

An alternate Director shall ipso facto cease to be an alternate Director if his appointor ceases for any reason to be a Director, however, such alternate Director or any other person may be reappointed by the Directors to serve as an alternate Director PROVIDED always that, if at any meeting any Director retires but is reelected at the same meeting, any appointment of such alternate Director pursuant to these Articles which was in force immediately before his retirement shall remain in force as though he had not retired.

如果该代理董事的指定者出于某种理由停止指定代理董事，则任一代理董事将不再是代理董事，然而，该代理董事或其他人士可被董事再次指定，该再次指定的目的是充当代理董事。在任何会议上任何董事退休但在同一会议上被重新选举，在董事退休前，依据相关条款对代理董事的任一任命将立即生效并在该董事未退休的时间内将一直保持效力。

Key management is the core problem of network system security, which deals with the correlative problems from key being generated to ultimately destroyed; it includes system initialization, key generation, key encasement, key distribution, key storage, key renovation, key destruction, etc. Thereinto key distribution and key storage are the two most intractable taches of key management.

密钥管理问题是网络系统安全中首要的核心问题，它是处理密钥自产生到最终销毁的整个过程中的有关问题，包括系统的初始化，密钥的产生、装入、分配、存储、更新、吊销和销毁等内容，而密钥的分配和存储是密钥管理中最为棘手的两个环节。

The method includes steps: digital watermark technique is adopted to hide information of key data in not key data codes of compressed image; under protection of digital watermark, using protective backup for key data detects whether normal transmitted key data is correct or not so as to detect error code; carrying out cyclic mutual backup by using macro blocks in same positions in front and back macro block set; embedding coded motion vector in form of digital watermark to DCT transformation coefficient, and ensuring that video data are not influenced as best as one can; when error code occurs, if key data backup is correct, then the backup replaces former key data; otherwise, using mean value of key data in adjacent macro blocks within same frame to replace former key data approximately.

本发明中，采用数字水印技术在压缩图像的非关键数据编码中隐藏关键数据信息；通过数字水印保护下的关键数据保护备份来检测正常传输的关键数据是否正确，由此来检测传输误码；用前后宏块组中相同位置的宏块进行循环相互备份；对运动向量进行编码，然后以数字水印的形式嵌入到相对不重要的DCT变换系数中，同时保证视频数据尽量不受影响；在误码发生时，如果关键数据备份正确，则直接替代原关键数据，否则用同一帧内相邻宏块的关键数据的平均值近似替代原关键数据。

与alternate key相关的网络解释 [注：此内容来源于网络，仅供参考]

alternate key：候选键

这些条件是作为数据库模式的一部分包存在数据库中的. 完整性约束条件在建表和修改表结构时指定. 实体完整性确保一个表中所有的行都是唯一的. 通过定义表的主键(primary key)和候选键(alternate key)来实现唯一性约束.

alternate key：替代关键字,备用关键字

61Alt keyAlt键 | 62alternate key替代关键字,备用关键字 | 63alternative test交错检验

alternate key：替用键

替用输入程序馆 alternate input library | 替用键 alternate key | 交替位准 alternate level

alternate key：交替关键字,辅助关键字,备用关键字

alternate joints 错缝接合 | alternate key 交替关键字,辅助关键字,备用关键字 | alternate key stroke 交错击键法,交替击键

ALT Alternate Key：备用键

Automatic Location Identification 自动位置识别 | ALT Alternate Key 备用键 | Automatic Line Test 线路自动测试