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Our products are mainly the business has four categories: First, the main agent of some well-known international brands of industrial belts, the Netherlands has DERCO, FABREEKA of PVC, PU, PE, SIR conveyor; Germany OPTIBELI, USA DAYCO, GATES, Japan BANDO, MITSUBOSAI the Triangle, timing belt, transmission belt, wide belt and so on; Japan Nitta textile special flat belt; BRECO Germany and Italy MEGADYNE polyurethane timing belt; CHEMFAB the United States of Teflon mesh belt and adhesive tape .

我司的经营产品主要有四大类:其一,主要是代理经销国际上的一些知名品牌的工业皮带,有荷兰DERCO,FABREEKA的PVC,PU,PE,SIR输送带;德国OPTIBELI,美国DAYCO,GATES,日本BANDO,MITSUBOSAI的三角带,同步带,变速带,广角带等;日本NITTA的纺织业专用平皮带;德国BRECO和意大利MEGADYNE的聚氨酯同步带;美国CHEMFAB的特氟龙网带和胶布。

In this paper, a carrier frequency synchronization algorithm based on autocorrelation has been introduced and realized in FPGA firstly, especially the Cordic algorithm and its realization. Secondly, two symbol synchronization algorithm based on crosscorrelation and autocorrelation are introduced and implemented in FPGA, then the comparison between them is made in the view of realization. Besides, the methods of area diplex and pipelining are embodied in implementation scheme of FPGA.

本文首先介绍了一种基于自相关的载波频率同步算法,给出了它的FPGA实现方案,重点讲述了其中用到的Cordic算法及其实现;然后介绍了分别基于互相关和自相关的两种符号同步算法,给出了各自的FPGA实现方案,从实现的角度比较了两种算法的优缺点,并且在FPGA设计中体现了面积复用和流水线操作的设计思想。

The article analyzed the Franz Schubert's Piano Sonata, Op.120 all-around with the elements of multidimensional structures, such as the pitch, rhythm, and textures. It discussed the effect of change and ratio to the drive and structure of the music through the three aspects of combination: the synchronous change and symmetry ratio of the element rhythm, the asynchronies change and the asymmetry ratio of the element rhythm, and the synchronous with asynchronies changes, and compared them with the Heinrich Schenker system.

内容提要:本文以舒伯特《钢琴奏鸣曲OP.120》为例,对该部作品的音高、节奏、织体等多维音乐要素进行了综合分析,从要素节律的"同步变化"和要素节律间的"匀称比率"、要素节律的"异步变化"和要素节律间的"非匀称比率"以及要素节律的"同步变化"、"异步变化"的结合三方面,来探讨了这些"变化"、"比率"对音乐的动力、结构力的作用,并与申克的还原体系分析方法进行了比较。

The article researched new type thyristor trigger that adapts the frequency of input power automatically, then analyzed the designing ways and process of frequency-tracked trigger in detail, yet validated capability of trigger through experiment and actual appliance in project, we also build up the fault-diagnosed and disposal cell of hypogyny machine with SIMATIC S7-200 PLC, besides, programmed and debugged to realize various monitor and diagnose; more, smart design make protection function more perfect and action more sensitive, so it can realize perfect swift and reliable protection under fault condition.

本文重点研究了以频压变换技术为核心的新型频率跟踪触发器,详细分析了频率跟踪触发器的设计思路和设计过程,实现了在同一移相控制电压下,当同步电压频率大范围变化时触发器输出触发脉冲的电角度保持不变的目的,满足了项目对同步电压频率变化时晶闸管准确触发的要求;并通过实验和工程实际应用验证了触发器的性能。设计了基于SIMATIC S7-200 PLC软硬件的故障诊断系统并调试了各项监控、诊断功能;实现故障条件下准确、迅速及可靠的保护。

This paper simplifies the huge power system to be a linear circuitry by only the installation of Phasor Measurement Units on some buses to measure the voltage and current vector. Under Kirchhoff's law and Ohm's law, the conditions of inter-connected buses are calculated and further at the operation of whole system. Moreover, the understanding of electrical tide distribution is more understood and enable the power station workers monitor instantaneously and make comparison of operation frequencies at each area to monitor if the low frequency oscillations.

本论文系将庞大的电力系统想像成一个线性的电路系统,将某些汇流排装设同步相量量测单元,量测其电压、电流相量,藉由Kirchhoff's Law与Ohm's Law推算其相连接的汇流排的状态,进而了解整个系统运转时,电力潮流分布情形,提供电力公司人员作即时的监视,以及对各地区域的系统运转频率作同步比较,监视系统是否有低频振荡的情形产生。

This invention provides a method for transferring third party landing based on IP network including: a door network station carries a ciphered KEY generated randomly by a service server to send a link request to a third party network station so as to avoid transmission of user ciphered codes and ensure absolute security of user codes, besides, since the third party network station calls back the Web server by copying the ciphered KEY to verify the cryptographic key so as to secure the absolute safety of shaking hands, since the door network station does not transfer user ciphered codes with the third party network station, which is not necessary to synchronize with the door station about codes, thus the requirement of complicated maintenance to synchronization on ciphered codes to the third party is reduced.

本发明提供了一种基于IP网络转接第三方登陆的方法,其关键是,由门户网站携带业务服务器随机生成的加密KEY向第三方网站发送链接请求,避免了用户密码的传输,因而保证了用户密码的绝对安全性。再有,由于第三方网站通过复制加密KEY回调Web服务器,由Web服务器进行密钥验证,因而又保证了握手的绝对安全性。应用本发明,由于门户网站与第三方网站之间不传递用户密码,使得第三方网站无需与门户网站进行密码同步等机制的处理,在大大提高安全性的同时,降低了对第三方网站对于密码同步机制等复杂维护的要求。

Firstly, the basic concept and convention about formalized stand language LOTOS is introduced, and, the language was improved and extended by adding discrete time domain and time operator to confirm its syntax and semantics rules.

本文首先论述了形式化规范语言 L OTOS的基本概念与约定,对其进行了基于时间的改进和扩充,引入了离散时间域和时间操作算子,然后确定其相应的语法定义和语义规则,通过仔细分析分布式环境下的多媒体同步问题,基于时间扩充的 L OTOS,给出了一种特殊的多媒体同步系统以及具体的算法描述。

Firstly, the basic concept and convention about formalized stand language LOTOS is introduced, and, the language was improved and extended by adding discrete time domain and time operator to confirm its syntax and semantics rules. Then, a special multimedia synchronization system and implement algorithm is proposed by anatomizing multimedia synchronization problems in distributed environment.

本文首先论述了形式化规范语言LOTOS的基本概念与约定,对其进行了基于时间的改进和扩充,引入了离散时间域和时间操作算子,然后确定其相应的语法定义和语义规则,通过仔细分析分布式环境下的多媒体同步问题,基于时间扩充的LOTOS,给出了一种特殊的多媒体同步系统以及具体的算法描述。

To some problems of it, the design train of thought that only A/D, subdivision and counting circuit compose open-loop control system is proposed in this paper. It thoroughly renovates traditional design train of thought; Integrated subdivision circuit on the basis of AD2S90 and QA740210 is proposed and designed; Digital readout system has simple PLC function and realizes communication between it and PC; Advanced LCD technology is adopted; Using software error amendment realize dynamic compensation for error; Intelligence digital readout system by inductosyn having high accuracy and multifunction is designed.

针对目前感应同步器数显表存在的一些问题,本论文研究中提出了仅有A/D转换、细分和计数电路组成的开环控制系统的设计思路,彻底革新了传统的设计思路;提出并设计了基于AD2S90和QA740210的集成化细分电路;使数显表具有了简易PLC的功能,实现了上位机PC和数显表之间的通讯;采用了先进的LCD液晶显示技术;利用软件误差修正方法可以实现对误差的动态补偿;开发设计了精度高、功能多的智能数字化感应同步器数显表。

No additional data for frequency tracking are need, but higher estimation accuracy and low computational complexity can be obtained. Finally, a kind of optimizing joint algorithm for symbol timing, frequency synchronization and channel estimation is proposed. The false alarm probability and miss detect probability of the symbol timing are derived. We proved that the time-frequency offset domain random sequence sliding in the frequency offset direction is orthogonal with the original random sequence, and proposed a new integer frequency offset estimation algorithm. The coarse estimation methods for fractional frequency offset both in AWGN and multipath channels are proposed too.

最后,提出了一种优化的符号同步、频偏估计和信道估计的联合算法,推导了符号同步方法的虚警概率和漏检概率,给出了随机序列在时间-频率偏移域沿频率偏移方向滑动后与原序列近似正交的证明,提出了一种新的在时间-频率偏移域沿频率偏移方向进行滑动相关估计整数频偏的方法,提出了在AWGN信道和多径信道下进行小数频偏粗估计的方法,给出了小数频偏细估计的ML估计结果和利用频域PN序列取值特性的简洁的信道估计结果。

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推荐网络例句

I can not make it blossom and suits me

我不能让树为我开花

When temperatures are above approximately 80 °C discolouration of the raceways or rolling elements is a frequent feature.

当温度高于 80 °C 左右时,滚道或滚动元件褪色是很常见的特征。

The lawyer's case blew up because he had no proof.

律师的辩护失败,因为他没有证据。