by sensing the electromagnetic environment, users of cognitive radio system choose a suitable frequency to communicate with each other that balances the service time of all the frequency. then the frequency efficiency increases.

in this thesis under a general assumption on the distributions of the call holding time and the cell residence time, the characteristics of new call and handoff call channel holding times are studied.

假定小区驻留时间和呼叫持续时间均服从一般分布，本论文对新呼叫和切换呼叫的信道占用时间进行了研究。

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the research showed that filling takes much time. it takes 35.9% of the time of the whole cycle. high efficiency filling guarantees the high efficiency of the whole mining technology.

对整个采矿工艺研究表明，充填是占用时间最多的环节（本工艺充填时间占整个工作循环时间的35.9%），高效的充填工艺是保证整个工艺高效的不可缺少的组成部分。

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this paper studies the characteristics of such system by considering the parameters of data transferring characteristics during runtime, the load of nodes types in the system and the network time occupied.

本文研究了采用分布式网络信息跟踪的各项参数特征，包括运行时的数据传输特征，分布式站点的数据负担特征，以及网络占用时间情况特征等。

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first, we introduce several general algorithms, which are scheduled based on the characteristic of information, such as priority, length, and time of information in system.

首先介绍了几种基于信息特征（如优先级、长度、信息在系统总的占用时间等）的调度算法。

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number of waits and total wait time: the number of instances and total elapsed time when the thread was waiting while invoking a method or service.

等待数量和总等待时间：调用某方法或服务时，等待线程的实例数量和总占用时间。

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conclusions computer-aided indirect brackets bonding is a new method with the advantages of time saving, accurate bracket placement and simplification of manufacturing procedure.

结论计算机辅助正畸托槽的间接粘接，能够保证托槽的精确位置，同时节约椅旁占用时间，减少实验室操作步骤，可作为托槽间接粘接的新技术。

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indexes typically speed up queries, sometimes reducing the time required to execute the query to a fraction of the former elapsed time.

索引很好地加快了查询地速度，有时将执行的时间减少到以前占用时间的一小部分。

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build timing: print the time to spawn individual build tools and the complete build time to the output window.

生成计时：在输出窗口中显示生成各个生成工具的时间和完整的生成占用时间。

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there is a time and a place for everything, in everyday life and during a software development project.

日常生活中和软件项目开发中，每一件事都要占用时间和空间。

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in grid casting operations, mold spray application involves time when no grids are produced.

在板栅铸造过程中，给模具喷涂也占用时间，其间不生产板栅。

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some might think that this approach is too time intensive on my part.

有些人会认为这种方法对于我这一方来说太占用时间了。

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specify digital circuit timing: setup and hold times and logic propagation delays.

指定数字电路时间∶安装和占用时间和逻辑传播延迟。

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yet, these oversimplified assumptions may not be appropriate for pcs networks, as mobility patterns and data rates of multimedia services differ from each other, and even new calls and handoff calls belonging to the same traffic type may have different average channel holding times.

然而，这些过于简单的假设对于PCS网络未必适用，因为多媒体业务的移动模型和数据速率彼此区别，另外，即使是属于同一业务类型的新呼叫和切换呼叫的信道占用时间也不一定相同。

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simulation shows that, compared with the feedback synchronous scheme, the method enables unsynchronous henon system to synchronize and the transition time of synchronization of bragg chaotic system to decrease to 12% of the feedback synchronous scheme.

模拟结果表明，该方法能够实现反馈同步方案不能同步的Henon映射系统，并能使Bragg混沌系统同步过渡过程所占用时间减小到反馈同步过渡过程所花时间的12%。

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in order to improve communication efficiency and shorten channel occupation time, it is necessary to preprocess the recorded data. this paper solved the problem by adopting huffman self-adapting compress algorithm.

由于录波数据量大，传送时间较长，为了提高通讯效率，缩短信道占用时间，论文中采用HUFFMAN自适应压缩算法，较好地解决了这个问题。

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thus, the use of indexes and side tables typically reduces the absolute elapsed times for both xml and clobs, but does not erase the large relative performance advantage of xml over clob columns.

因此，使用索引和索引表通常能够缩短XML和CLOB的绝对占用时间，但是不会消除XML相对CLOB列较大的相对性能优势。

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refer to clock frequency and a single list structure, timer architecture can meet the condition of system clock accuracy, and simultaneously reduce run-time of timer.

借鉴时钟的分频思想，采用单链表结构设计的定时组件可以在满足网关系统其它组件对时钟精度要求条件下，降低系统CPU的占用时间。

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this paper proposes an xml update algorithm based on sax model, which can decrease memory and time take for updating xml document.

提出一种基于SAX模型的XML文档更新算法，利用SAX模型占用时间和空间少的优点进行文档的更新。

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setting the elapsed time for xml inserts as the comparison baseline ( 100%), maintaining six xml indexes incurs only little overhead ( 5% in our scenario).

将XML插入的占用时间用作比较基线（100%），维护6个XML索引仅需很小的开销（在我们的场景中是5%）。

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the new study looked at jobs, which the academic said involved more engagement than hobbies, which often last less than an hour.

新研究针对的是对脑力要求高的工作，研究人员表示，人们在工作中从事的活动比爱好更多，后者每日占用时间通常不到一小时。

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