56results about How to "Reduce the number of taps" patented technology

The invention discloses novel stemming at a tap hole. The stemming comprises the components in parts by weight as follows: 5-25 parts of corundum, 5-25 parts of high aluminum aggregate, 10-30 parts of silicon nitride combined with silicon carbide, 2-3 parts of silicon nitride iron, 5-15 parts of coke powder, 8-20 parts of clay, 1-5 parts of crystalline flake graphite, 5-10 parts of pyrophyllite, 4-7 parts of sericite, 5-10 parts of magnesium-aluminum spinelle, 2-4 parts of active alumina micro powder, 1-3 parts of metal powder and 15-20 parts of external composite binding agent. The composite binding agent comprises tar, modified phenolic resin and an organic solvent. The volume ratio of tar, modified phenolic resin to the organic solvent in the composite binding agent is 1:3:1. According to the invention, with the adoption of the composite binding agent formed by mixing tar and modified phenolic resin, smoke generated is less, the same plasticity to be combined with tar is met, the opening performance is good, the pressure resisting thermal shock resistance is good, and the adhesion strength is high. The depth of the tap hole can be prolonged and the furnace cylinder can be protected, the tapping time is prolonged, and the number of casts every day is reduced.

The invention provides an implementation structure of a fractional delay digital filter. By factorizing odd term and even term of independent variable z in the frequency response function of the fractional delay digital filter, a high-level fractional delay digital filter operation can be factorized into two low-level fractional delay digital filter operations and one complex multiplication operation, thus the variation range of the target fitting curve which takes the delay parameter as the independent variable can be narrowed, the curve fitting orders can be lowered, the number of taps of the filter can be decreased, and hardware resources required for realizing the fractional delay digital filter can be reduced on the premise of not reducing the delay precision.

A numerical string consisting of a ratio of “−1, m, −1” or “1, m, 1” is subjected to a predetermined moving average calculation n times. A numerical string thus obtained is used as filter coefficients of a basic filter and at least one basic filter is combined in an arbitrary way for cascade connection, thereby calculating the filter coefficients of the digital filter to be obtained. This significantly reduces the number of taps and the number of multipliers used as compared to the conventional FIR filter. Moreover, by using the numerical strings “−1, m, −1” and “1, m, 1” so that the filter impulse response becomes a finite-base function, it is possible to obtain a preferable frequency characteristic having no discretization error and having a great attenuation amount out of band.

A test circuit board adapted to be used on USB connector is provided. Two test circuit boards can be seriously connected with each other through a first JTAG connection interface and a second JTAG connection interface. Therefore, the efficiency of reducing TAPs of TAP controller and providing test signal coverage of all of test signals may be achieved.

A standard function is inputted and an interpolation function of finite length is calculated therefrom. Then, the frequency characteristics of the interpolation function is shifted by a desired amount in the frequency axis direction, thereby determining input frequency characteristics based on specification. Filter coefficients are determined by performing inverse FFT of a numerical sequence representative of the input frequency characteristics and rounding is performed according to the coefficient values in order to obtain a smaller number of filter coefficients. Thus, it is possible to eliminate the need for windowing as an operation for decreasing the number of filter coefficients and easily design an FIR filter having desired frequency characteristics.

A symmetric unit filter (L10') is designed by combining in series two unit filters (1L10, 2L10) having asymmetric numerical sequences as filter coefficients (H1 to H3 and H4 to H6). Thus, by designing a filter by series connection, it is possible to automatically obtain a desired digital filter coefficient only by combining one type of unit filter (L10') in series. Moreover, a symmetric numerical sequence {-1, 0, 9, 16, 9, 0, -1}/32 is divided at the center into two parts and one of them is used as the asymmetric filter coefficients (H1 to H3 and H4 to H6). This reduces the number of necessary taps, eliminates use of a window function, and prevents generation of a discretization error in the filter characteristic obtained.

The invention provides a blow-in burdening method for a blast furnace. The method comprises the steps that 100 m<3>-200 m<3> of coke and 300 m<3>-1,300 m<3> of hardwood are arranged in a miscellaneous tree section of the blast furnace; 10 t-20 t of dry extinction coke is arranged in each batch of materials of a net coke section of the blast furnace; 10 t-20 t of coke, 0.5 t-1 t of fluorite and pellet ores with the mass percent not smaller than 60% are arranged in each batch of materials of a normal material section of the blast furnace; and the content of CaF2 in material slag in the normal material section is 2%-6%, the content of Si in molten iron is 2.5%-4%, and the iron charge load level is not larger than 2.5. Thus, the blow-in cost can be reduced by adopting the hardwood for blow-in operation, by adoption of a large proportion of pellet for the blow-in operation, the furnace slag generation amount can be reduced, the ventilation performance of a soft melting belt is improved, the blow-in progress is accelerated, and the direct motion state of the blast furnace is stabilized; and the number of tapping times can be reduced through few-slag or ultralow-slag ratio blow-in, the tapping time is delayed, it is guaranteed that iron in the furnace obtains the sufficient physical heat, and more qualified pig iron can be better recycled.

The invention relates to a television signal ghost canceling method based on wavelet pretreatment GCR and a system thereof. The method comprises the following steps: the denoise of a received GCR signal is carried out by wavelet transformation, the channel feature is estimated according to the de-noised GCR signal waveform, an optimum coefficient of a ghost canceling filter and an equalization filter is obtained and ghost canceling to the digital television signal is carried out by the ghost canceling filter and the equalization filter. By adopting the method, the tap number of the filter can be reduced, thus reducing the hardware requirement of the ghost canceling system, and the power consumption of a chip reduces as MAC operation reduces. The method and the system provided by the invention can reduce the training time of the filter, track the time-varying channel rapidly and reduce the hardware requirement of the system, and have important theoretical meaning and practical meaning in digital mobile communication.

A test circuit board adapted to be used on PCI-E slot is provided. Two test circuit boards can be seriously connected with each other through a first JTAG connection interface and a second JTAG connection interface. Therefore, the efficiency of reducing TAPs of TAP controller and providing test signal coverage of all of test signals may be achieved.

The present invention aims to provide a delay device having an analog delay line adaptable to a plurality of frequencies with a less number of taps. The analog delay line has a maximum delay amount equivalent to a wavelength from over a ⅜ wavelength of a predetermined maximum wavelength of an input signal to under a 1 wavelength thereof. Tap intervals up to a delay point equivalent to ½ of a predetermined minimum wavelength of the input signal are different from tap intervals placed ahead of those. The maximum wavelength is a wavelength of a signal having a frequency of 2 MHz, for example, and the minimum wavelength is a wavelength of a signal having a frequency of 5 MHz, for example.

A test circuit board adapted to be used on memory slot is provided. Two test circuit boards can be seriously connected with each other through a first JTAG connection interface and a second JTAG connection interface. Therefore, the efficiency of reducing TAPs of TAP controller and providing test signal coverage of all of test signals may be achieved.

The invention provides a force-limiting damping device. The force-limiting damping device is provided with a body, a knocking piece, a damping elastic piece and a force limiting set, wherein the bodyis provided with a combining part and a holding part, the knocking piece is movably combined with the body and can move relative to the combining part, the knocking piece is provided with a sleeving part, a knocking part and a locking part, the sleeving part is movably combined with a sleeving hole of the combining part, the knocking part is arranged at one end of the sleeving part and located below the combining part, the locking part is combined with the sleeving part and abuts against the combining part, the damping elastic piece is arranged on the sleeving part in a sleeving mode and abutsagainst the combining part and the knocking part, and the force limiting set is arranged between the knocking piece and the body. Therefore, the force-limiting damping device which has the remindingeffect, has the improved vibration feeling and has the force application range capable of being adjusted according to needs is provided.

The invention discloses communication equipment and a filter thereof. The filter comprises a shell having a first direction and a second direction perpendicular to each other, afirst common cavity, a first filtering branch and a second filtering branch, wherein the first common cavity is arranged on the shell; the first filtering branch is coupled with the first common cavity, consists of six filtering cavities which are sequentially coupled and forms two cross coupling zero points of the first filtering branch; and the second filtering branch is coupled with the first common cavity, consists of four filtering cavities which are sequentially coupled, and forms a cross coupling zero point of the second filtering branch. In the way, the number of taps can be reduced, and the size of the filter is reduced.

The invention discloses communication equipment and a filter. The filter includes a shell, a first common cavity, a second common cavity, a firstfiltering branch, a secondfiltering branch, a fourthfiltering branch and a fifthfiltering branch, wherein the first common cavity and the second common cavity are arranged on the shell in a spaced mode in the first direction of the shell; the first filtering branch consists of six filtering cavities which are sequentially coupled, and is coupled with the first common cavity to further form two first inductive cross coupling zero points; the second filtering branch consists of seven filtering cavities which are coupled in sequence, and is coupled with the first common cavity to further form two second inductive cross coupling zero points; the fourth filtering branch consists of six filtering cavities which are sequentially coupled, and is coupled with the second common cavity to further form two fourth inductive cross coupling zero points; and the fifth filtering branch consists of seven filtering cavities which are coupled in sequence, and is coupled with the second public cavity to further form two fifth inductive cross coupling zero points. By means of the mode, the two common cavities are arranged, the number of taps can be reduced, the size of the filter is reduced, and the production cost is reduced.

The invention discloses communication equipment and a filter thereof. The filter comprises a first common cavity arranged on a first surface of a shell, a second common cavity arranged on a second surface of the shell, a first filtering branch arranged on the first surface and coupled with the first common cavity, a second filtering branch arranged on the first surface and coupled with the first common cavity, a third filtering branch arranged on the second surface and coupled with the second common cavity, a fourth filtering branch arranged on the second surface and coupled with the second common cavity, and a fifth filtering branch arranged on the second surface and coupled with the second common cavity. Through the mode, the number of taps can be reduced through the arrangement of the common cavity, and the size of the filter is reduced; the front and back arrangement reduces the size of the filter and reduces the cost.

The invention discloses communication equipment and a filter thereof. The filter comprises a shell, a first port, a first filtering branch and a second filtering branch, wherein the shell has a first direction and a second direction which are perpendicular to each other; the first port is arranged on the shell; the first filtering branch is connected with the first port and is composed of twelve filtering cavities which are coupled in sequence, and four coupling zero points of the first filtering branch are formed; the second filtering branch is connected with the first port and is composed of five filtering cavities which are coupled in sequence, and two coupling zero points of the second filtering branch are formed; and the projection of the first filtering branch in the first direction is overlapped with the projection of the second filtering branch in the first direction. Through the mode, the first filtering branch and the second filtering branch can share the first port, each filtering branch is prevented from being independently provided with a tap, the number of the taps of the filter is reduced, the size of the filter is reduced, and the cost is reduced.