The updating transaction may in theory use optimistic or pessimistic transaction locking at the time of update. 在理论上,更新事务可以使用乐观或悲观锁定进行更新。
Pessimistic record locking, which provides a way to prevent situations where multiple users can edit a record at the same time 消极记录锁定,它提供了避免发生多个用户同时编辑一条记录情况的手段
To help minimize mutex allocation and locking time, the JVM manages a global lock cache and a per-thread lock cache where each cache contains unallocated pthread_mutexes. 为了帮助实现互斥锁分配和锁定时间的最小化,JVM管理一个全局锁缓存和一个单线程锁缓存,其中每个缓存包含了未分配的pthreadmutex。
During an export operation, row-level locking is applied to the exporting table, which means that only one lock is held at a time. 在导出操作期间,行级别锁定应用于导出表(exportingtable),这意味着一次只持有一个锁。
CouchDB does not feature locking mechanisms; two clients can load and edit the same document at the same time. CouchDB没有锁机制;两个客户机可以同时加载和编辑同一个文档。
This addresses the data race, but has further costs for concurrency, since locking the entire List while iterating could block other threads from accessing the list for a long time. 这样做虽然解决了数据争用问题,但是在并发性方面付出了更多的代价,因为在迭代期间锁住整个List会阻塞其他线程,使它们在很长一段时间内不能访问这个列表。
There is now a locking mechanism to ensure that only one thread at a time goes through any of the wrapped calls. 现在有一个锁机制来确保每次仅能有一个线程经过任何已包装的调用。
New type of locking system decreases locking time and increases cutting torque. 新型锁固系统减少锁固时间提升切削扭力。
Easy for replacing the washing roller which is just to disassembly the locking bushingand replaced, time& labour saving. 清洗轮换装容易,仅需将清洗轮之固定套拆下,即可换装,省时、省力。
Biased locking is derived from the observation that most locks are never accessed by more than one thread during their life time. 大多数锁,在它们的生命周期中,从来不会被多于一个线程所访问。
After failing to lock the data, the random time locking method waits a random time and begin to apply lock again, which not only boosts the processing efficiency but also reduces the probability of dead lock. 随机等待加锁法在加锁失败时并不连续、不间断地申请锁,而是等待一个随机时间后重新启动新的加锁过程,不但提高了系统的执行效率,而且降低了死锁的机率。
Locking Time Study of 3~ ( rd) Order Charge Pump PLL 三阶电荷泵锁相环锁定时间的研究
This paper gives a new spatial data editing method, assistant table method. Also it improves single-record locking method, gives a time limitation of committing the editing result. 在比较目前存在的几种空间数据编辑方法的基础上,本文提出了一种新的处理方法辅助表处理方法,同时对单记录加锁策略进行了改进规定时间间隔提交编辑结果。
Death locking is the conflict of time that the process is asking for resources in the course of operating. 死锁是进程运行过程中对资源请求在时间上的冲突。
Mechanical locking testing technique has simple operation, high one time success rate and exact and comprehensive materials. The enveloping work can be done directly after test. 机械锁定式测试技术操作简单,测试一次成功率高,资料录取准确全面,且测试结束后可直接进行封堵作业;
A PIONEER DESIGN-Mechanical locking device free of power supply characterized by unidirectional and self-locking function is adopted for the first time based on deep research as well as considerable trial on the locking device of existing door system. 在对现有门系统锁闭装置深入研究和大量先行性试验的基础上,首次独创推出了单向自锁式无源机械锁闭装置。
On condition that error codes occur in the telemetry stream, the method of getting the optimum parameters is supposed in accordance with the algorithm of locking frame synchronization. The minimum average time of getting lock of frame synchronization is the most important foundation to determine these parameters. 在遥测数据流存在误码的情况下,针对锁定帧同步的算法,给出如何求出该算法中最佳参数的方法,提出平均入锁时间最小是确定这些参数的重要依据。
A strategy locking constraint resources using write lock and read lock is presented to consider the time delay of data transmission and improve the efficiency of concurrent operation. The realization of main algorithms for constraint network solving is given. 提出了写锁和读锁2种加锁状态的约束资源的锁定策略,来考虑网络传输的延时性和提高并行操作的效率,并给出了主要算法的实现说明。
Novel Charge Pump Design for Fast Locking Time PLL 一种快速锁定PLL的电荷泵设计
Results 10 cases obtained successful distal locking computer navigation. The fluoroscopy time was 10 s on average. 结果10例全部在导航下完成交锁髓内钉的远端交锁,平均透视时间为10s。
The system according to the following modules is designed: Dynamically-randomly displaying the test questions on screen, locking the examination time, automatically marking the examination paper, dealing with the "system halted" problem and managing the examination information. 将从组成系统的多个功能模块:自主创建考试科目、动态随机出题、考试时间锁定、系统自动判卷、计算机死机问题应对、考试信息管理对该考试系统进行设计并最终实现。
And compared with intramedullary nails, locking compression of the distal tibia bone plate surgery time is shorter, surgical bleeding the swelling subside after the operation time is shorter. 与胫骨髓内钉相比,锁定加压胫骨远端接骨板手术时间较短,手术出血量较少,手术后肿胀消退时间较短。
The demodulation curve and the locking time of the system are tested, and it is proved that the closed-loop system can realize the tracking for the resonance frequency. 测试了解调曲线及系统锁定时间,证明闭环系统能够实现对谐振频率的跟踪。
As a critical part of the frequency synthesizer, the fractional divider seriously affects the output frequency accuracy, phase noise, locking time and reference spur. 小数分频器作为频率综合器的重要组成部分,对频率综合器的输出精度、相位噪声、锁定时间及参考杂散等性能有重要影响。
First, the influence of the fractional-N divider on the frequency accuracy, phase noise and locking time of a frequency synthesizer is analyzed on the system level. 首先从频率综合器系统层面分析小数分频器对频率综合器输出精度、相位噪声、锁定时间等性能的影响。
All digital optical phase locking loop is implemented for the first time in the world. 全数字化的电子光学锁相、尤其是数字环路滤波器在电子光学锁相环中的实现在国际上尚属首次,暂无同类报道。
With the increase of the range of operating frequency, wider frequency range and shorter locking time are asked, thus we are facing great challenge in designing PLL. 随着集成电路工作频率范围的不断扩大,系统对时钟的频率范围以及锁定时间提出了更高的要求,锁相环设计面临更加严峻的挑战。