| 1. | The backup checksum can optionally be used at restore time ,
备份校验和可在还原时使用。 |
| 2. | Use snapshot backups to minimize backup and restore time
使用快照备份将备份和还原时间减到最少。 |
| 3. | At restore time , before you restore a differential backup , you must restore its base
在还原过程中，还原差异备份之前，必须先还原其基准。 |
| 4. | Be aware that to minimize your restore time , you can supplement each full backup with a series of differential backups of the same data
请注意，为了最大程度地缩短还原时间，可以使用同一数据的一系列差异备份来补充每个完整备份。 |
| 5. | Scheduling differential backups between full backups can reduce restore time by reducing the number of log backups you have to restore after restoring the data
在完整备份之间安排差异备份可减少数据还原后需要还原的日志备份数，从而缩短还原时间。 |
| 6. | Assuming you can back up the active log after a disaster occurs , you can restore the database up to the point of failure without data loss . the disadvantages of using log backups are that they require storage space and increase restore time and complexity
在sql server 2005 enterprise edition中，如果数据库处于完整恢复模式或大容量日志恢复模式，您还可以在没有使数据库全部离线的情况下还原数据库。 |
| 7. | Particularly , cr4 + - doped crystals as passive q - switch ( saturable absorber ) have got extensive attention , such as cr4 + : yag ， cr4 + : gsgg ， cr4 + : mg2sio4 and cr4 + : yso , which have the advantages of wild absorption band , good saturable absorption , long restored time , good photo - chemical stability , no fading , good thermal conductivity and high damage threshold
特别是近年来，掺cr4 +离子的各种晶体如cr4 + : yag ， cr4 + : gsgg ， cr4 + : mg2sio4和cr4 + : yso等作为被动调q开关受到了广泛的关注。它们具有很宽的吸收带和良好的饱和吸收性质，恢复时间较长，光化学性质稳定，无退化现象，热导性好，损伤阈值高。 |
| 8. | This may be uneconomical or even infeasible in some circumstances . in contrast , ec actions usually cost dearly , and need restoring time if the objective disturbances actually occur . obviously , it is great significant for assuring large scale power systems in security and economy operation states to optimize pc ec and their coordination
另一方面，扩展等面积准则( exendedequal - areacriterion - eeac )的完善、在线控制方案及其相关技术的成熟、优化领域的进展克服了研究统一的大电网暂态稳定控制安全性和经济性协调的客观、主观瓶颈，提供了课题研究的可行性依据。 |
