timing chip meaning in Chinese
计时基片
Examples
- In 3 - d ocdma system , the code sequence for each user is spreaded in time chip , wavelength and space . compared with 2 - d ocdma system , 3 - d system can accommodate more total users and simultaneous users
三维ocdma系统中,每个用户码字序列的光脉冲同时在时间域、频率域和空间域扩展,三维系统较之二维系统拥有更大的总用户和同时激活用户的容纳能力,系统性能更好。 - Cdma has become the main technology of the third generation mobiletelecommunication . many users in cdma system are distinguished by differentspread sequences and have the same time chip and frequency unlike in theconventional tdma system or fdma system . but the practical spread sequences cannot reach the ideal condition , the correlation function equals zero , so that it will causethe multiple access interference ( mai ) when lots of people are communicating . multi - user detection ( mud ) makes joint detection on the received signals by makingfull use of the information of all users ’ , which relaxes mai and increases the capacityof system
Cdma技术已经成为第三代移动通信系统中的主流技术,它与传统的fdma 、 tdma不同,在cdma系统中多个用户均占用同一时隙、同一频隙,所不同的是选取的地址码不同,而实际选用的地址码间的互相关函数又不可能全部达到理想状态的全为零,因而造成了多个用户同时通信时,必然要产生多址干扰。 - The developed apparatus can automatically measure evapotranspiration at setting up interval and memory the data through a 32 kilobyte data storage memory . measured data can be transmitted to personal computer by rs232 series communication interface . apparatus will be trigged at measurement time by a real time chip set in it
该仪器通过实时时钟芯片实现间隔采集动作的触发及时间、日期的计数；利用液晶显示器( lcd )进行显示；使用它能在无人监管的工作环境下，定时进行蒸散测量并将测得数据自动保存到32k数据存储器中；再通过rs232串行通讯接口将数据传送到pc机进行进一步处理。 - This article describes a way of special ultrasonic system which monitors thermal stress in seamless welded rails . this monitoring system is a non destructive testing system , which adopts avr mcu and high - precise time chip processing as the core of it , and adopts the critically refracted longitudinal wave as the object of measuring . my studying focuses on the theory of the monitoring system , which will be listed in this arctile : according to the snell theory , the theory of motivating of critically refracted longitudinal wave is described in details , and the finite element software is used to emulate the propagating course . the formulas of calculating the pts of swr are taken from the acoustoelasticity theory , and the calculating the parameters is introduced . according to assemble materials , three kinds of ways of monitoring the pts of swr using critically refracted longitudinal wave are described , which are measuring the sound - time in changeless distance , ultrasonic critical - angle refractomery and frequency spectrum , the first way of ways is used in this experiment system . the factors , which effect the monitoring system , are assaid in some degree based
本文的研究工作重点在无缝焊接钢轨温度应力测量系统的理论模块,包括根据snell原理,研究极限折射纵波的激发机理,并使用有限元软件ansys进行仿真;根据声弹性理论以及公式推导出计算无缝焊接钢轨中的温度应力的公式,并对其中参数的求解方法进行介绍;根据收集的资料,介绍了三种使用极限折射纵波测量无缝焊接钢轨温度应力的方法,即固定距离测量声时法、临界角折射法和频谱分析法,本实验系统使用的是第一种;根据实验经验以及相关资料,分析了影响极限折射纵波测量温度应力的几个因素,并提出了相应的解决方法;根据实验系统的需要,独立设计并加工出相关配套的实验设备,包括实验钢块、有机玻璃楔块、固定件、载荷外框装置等。 - Equipment of power quality dynamic compensation control realization can be either digital or analogical . the advantage of digital compensation control ( dcc ) is that it can compensate harmonics to a precision level and is independent of the surrounding environment . but dcc need high - speed real - time chips to deal with digital signal processing , so it has high price
电能质量动态补偿装置的控制是影响电能质量动态补偿装置的性能的重要因数,电能质量动态补偿装置的谐波补偿主要有数字补偿控制和模拟补偿控制两种,数字补偿的优点是可以对电网谐波的补偿达到很精确的程度,不容易受到外界运行环境的影响,但是要求运行速度很高的实时数字信号处理器,因此造价较高,模拟补偿控制对硬件要求比较严格。