查询词典 filter

This invention discloses a duplexer and a multiplexer of the communication system and a method to realize them on a PCB circuit, which applies a 3db bridge and a low pass filter to constitute a hopstreet duplexer without waste band channels, in which, the signals are shunted and combined by the design of the circuit structure and power distribution of the 3-db bridge and phase offset function, the band filter of the low pass filter and the reflection function of a stopband to make up of a costless duplexer in theory to merge the two channels of different frequencies and reduce loss to increase volume and working bandwidth, then a multiplexer is formed by cascading multiple duplexers.

本发明涉及通信设备，公开了一种通信系统双工器和多工器以及双工多工方法，使得双工器和多工器能够在PCB电路上实现，并且体积小、损耗小、成本低、容量大。本发明中，采用三分贝电桥、低通滤波器构成无损耗频带信道合路的双工器，其中通过电路结构的设计并利用三分贝电桥的功率分配和相位偏移功能将各路信号进行分路和组合，利用低通滤波器的频带滤波和阻带反射功能联合三分贝电桥构造一个理论无耗的双工器，使两路不同频率的信道合路，降低的损耗、提高容量和工作带宽。通过多个上述双工器的级联构成多工器。

SNC also manufactures the bag filter, basket filter, candle filter,etc.

上海九本还为客户提供袋式过滤器、篮式过滤器、芯式过滤器等常规过滤器。

Calculation and analysis the effects of primary flow parameters and structure parameters such as fliter volocity of flow,diameter of ceramic particle,void fraction of ceramic,section shape of ceramic filter element on filter efficiency and pressure drop of regid candle ceramic filter element in this paper.

计算和分析了渗流流速以及陶瓷颗粒直径、孔隙率、陶瓷过滤元件截面形状等主要流动参数与结构参数对于刚性烛状陶瓷过滤器过滤效率和过滤流动的压力降等特性的影响。

In a ceramic filter experimental set-up with three filter candles, the dynamicpressures at the inner wall of one filter candle during pulse-jet cleaning are measured byusing resize-electric pressure transducer.

利用压电式压力传感器测定了陶瓷过滤器在脉冲反吹过程中滤管内动态压力的变化规律，表明在脉冲反吹快要结束和正常过滤尚未开始的过渡过程中，滤管内存在严重的负压区。

This article proposed one kind of improvement algorithm in this foundation, this algorithm has defined a filter balance factor formula, according to this formula, we readjustment filter balance factor value appropriately, through controlsling the LMS filter coefficient's freezing and the restoration, we solute echo puzzle perfectly; In the telephone condition examination algorithm aspect, in view of the busy signal examination algorithm which has has only been able to examine the busy signal, but cannot examine the dial tone, hang the staccato the deficiency, this article improves its algorithm to enable it to apply these aspects, make it can be better used in the actual system application.

本文在此基础上提出了一种改进算法，该算法定义了一个滤波器平衡因子的计算公式，根据此公式，适当调整滤波器平衡因子的阀值，通过控制LMS滤波器系数的冻结和恢复，很好的解决了回声的困扰；在话机状态检测算法方面，本文针对已有的忙音检测算法只能检测忙音，而不能检测拨号音、挂断音的不足之处，研究改进其算法使之能够应用到这些方面，更好的为实际系统的应用服务。

Dissolve the residue in 8 ml of toluene R. Filter through a membrane filter (45 μm), rinse the flask and the filter with toluene R and dilute to 10.0 ml with the same solvent.

残留物用8ml甲苯溶解，并用滤膜（45um）过滤，用甲苯冲洗蒸发瓶和过滤器，并稀释到10ml

This paper expounds the working principle s and application of the vacuum filter in Jinyang Coal Separating Plant, and probes into the necessity and feasibility of replacing the vacuum filter with leaf filter.

叙述了真空过滤机的工作原理及其在晋阳选煤厂的使用情况，探讨了用加压过滤机替代原有真空过滤机的必要性与可行性。

On the foundation of understanding the structures and operating principles of filter press, the design calculation of the main structures was analysed, including the filter board and draw-plate and so on, and the improvement design of the control system and filter mechanism was accomplished in this thesis.

论文在了解压滤机的结构和工作原理的基础上，分析了压滤机主要结构的设计计算，包括压滤机滤板和拉板的受力等，完成了对压滤机控制系统和过滤机构的改进和设计。

And for a variety of customized non-standard type filter press and filter, filter box (including the special requirements of the Import and Export Products).

并且能为用户定制各种规格的非标型压滤机及滤板、滤框（包括进出口产品的特殊要求）。

Filter the cold solution using the Hirsch funnel (cover the bottom with a wet 17 mm filter paper) into a 50 ml filtering flask (don't forget to attach the neoprene filter adapter).

用赫氏漏斗(把一张湿的17 mm长的滤纸覆盖在它的底部)过滤冻的溶液，用一个50 ml的抽滤瓶接收(不要忘记要加一个由氯丁橡胶制的过滤接头)。

And Pharaoh spoke to Joseph, saying, Your father and your brothers have come to you.

47：5 法老对约瑟说，你父亲和你弟兄们到你这里来了。

Additionally, the approximate flattening of surface strip using lines linking midpoints on perpendicular lines between geodesic curves and the unconditional extreme value method are discussed.

提出了用测地线方程、曲面上两点间短程线来计算膜结构曲面测地线的方法，同时，采用测地线间垂线的中点连线和用无约束极值法进行空间条状曲面近似展开的分析。