双通道

Double channel bandpass sampling method for wide band IF signal is presented to settle the problem of blind zone,which exchanges one more sampling channel for simplification of clock circuit and band pass filter.As a practical reconnaissance receiver, real-time processing performance must be considered.Digital channelizing method lays the base of parallel processing by multi DSP chips and discarding of the redundant data resulting from double channel bandpass sampling.

针对带通采样存在着频率覆盖盲区的问题，提出了宽带中频信号双通道带通采样的方法，通过增加一个采样通道既解决了传统处理盲区方法中设计复杂采样时钟电路、高矩形系数滤波器的困难，还缓解了后续DSP处理压力。

Aiming at the high-speed matching controlling problems between adaptive filters inplemented by FPGA and the high-speed AD converters, a high-speed sampling and adaptive filtering system was designedusing asynchronous FIFO. The dual channels AD converter AD9238-40 was used as input stage, two asynchronous FIFOs on-chip were used as high-speed buffer memory, and the sampling and adaptive filtering was controlled by FPGA. The asynchronous FIFO was customized and simulated on Quartus II, the sampling and adaptive filtering controller was designed and also simulated on Quartus II. The high-speed matching controlling of the dual channels AD converter AD9238-40 and the adaptive filter was implemented.

针对用FPGA实现的高速自适应滤波器与高速ADC数据处理速度不匹配、容易产生串扰等问题，提出了一种基于异步FIFO技术的高速采样自适应滤波系统方案，选用双通道高速AD9238-40作为前置输入级，用片内异步FIFO作高速缓存，用FPGA控制采样与滤波，给出了系统的结构框图，对异步FIFO与采样滤波控制器进行了仿真，并将异步FIFO与采样滤波控制器集成在同一FPGA上，完成了对双通道高速AD9238与自适应滤波器的高速匹配控制。

Multiple-channel percutaneous nephrolithotomy was carried out for 38 cases of staghorn or multiple renal calculi,of which 32 were treated via bi-channel approach while the remaining 6 via tri-channel approach.68 times of lithotomy were performed with the stone clearance rate above 84%.

总结1990～1996年38例鹿角形或多发性肾结石病例，采用经皮肾多通道穿刺取石方法，共作双通道穿刺取石32例，三通道穿刺取石6例，取石68次，疗效满意，结石清除率达84％以上。

This invention relates to a gas reburning and double-channel rich/lean integrated combustor of low Nox, in which 7 air nozzles and 7 fuel nozzles interlace with each other. The air nozzles are all connected to a bellow and receive air supply from a large tank-type bellow. The fuel nozzles are connected to respective fuel system through the bellow. From up to down, the 7 fuel nozzles are: the gas nozzle, the double-channel up-lean and down-rich coal powder nozzle, the double channel up-rich and down-lean coal powder channel, 3 double-channel level rich/lean coal powder nozzle (the rich phase is near the flame), and the oil nozzle inside the nethermost air nozzle.

气体再燃与双通道浓淡集成型低Nox燃烧器，7个空气喷嘴和7个燃料喷嘴交错布置，各空气喷嘴与风箱连接，由一个槽型体大风箱供风，各燃料喷嘴均穿过风箱同各自的燃料系统连接，7个燃料喷嘴从上至下依次排列为：燃气喷嘴、双通道上淡下浓煤粉喷嘴、双通道上浓下淡煤粉喷嘴和3个双通道水平浓淡煤粉喷嘴，燃油喷嘴置于最下边的空气喷嘴中。

The conditions of the filters that should be satisfied are also derived. By analyzing the transformation structure of orthogonal wavelets and biorthogonal wavelets, the data acquisition method based on multichannel structure is proposed. The compensation method is discussed, and the design method of compensation filters is also derived.

在分析了正交小波与双正交小波变换的结构的基础上，利用多分辨理论的性质，提出了基于小波方法的双通道及多通道数据采集方法，最后对这种结构中可能存在的误差的补偿方法进行了研究，得出了去除误差的滤波器设计公式，从而完成信号的采集与恢复。

Company to operate the noise and vibration measurement and analysis equipment, including from a simple integral sound level meter, single-channel real time analyzer, dual-channel real-time multi-channel analyzer to the interactive analysis system, the artificial head recording and playback system.

公司经营的噪声与振动测量分析仪器包括从简单的积分式声级计、单通道时实分析仪、双通道实时分析仪到多通道互动式分析系统、人工头录音和回放系统。

The controller uses the data write buffer to reduce the data access waiting time, and employs the two ways of duo channels instruction pre-fetch buffer to decrease the fetching instruction waiting time and increase the instruction pre-fetch buffer hit rate. Meanwhile, to reduce the waiting time aroused by page miss of SDRAM, a four ways of on chip stack memory is introduced. Compared with traditional controller through experiments the novel SDRAM controller gets a high reduction up to 63% in access waiting time and 64% in page miss.

该控制器采用数据写缓存方式降低了数据在存取内存时的等待时间；并引入了两组双通道预取指令缓冲器，每组双通道都用以减少取指令时的等待时间，采用两组的结构是为了增加指令预取的命中率；同时还使用了四路组关联的片上堆栈存储器来降低SDRAM的页失效频率，从而降低了因页失效而需要等待的时钟周期。

And this burner is expected to be applied to boiler design and retrofit.

本文系统地阐述了双通道燃烧器的工作原理，对双通道燃烧器的流动特性进行了理论分析。

Application of 12V8 full DC magneto, dual-channel CDI, double ignition coil and double spark plugs enable quick ignition at low speed and high-energy ignition at high-speed, and ensure smooth startup in oxygen-deficit highland conditions, cold weather and other heavy conditions.

采用12V8极全直流磁电机、双通道点火器、双高压包、双火花塞，使发动机实现低速快速点火和高速高能点火，能在高原贫氧和寒冷天气等恶劣环境条件下正常启动。

Mid-Side ganging in which the first channel fader controls the gain of both channels and the second channel fader acts as an image width control.

中秋节侧大姊头，其中第一个通道推子控制的双通道和第二通道为图像宽度控制推子行为的收益。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。