37results about How to "No filtering required" patented technology

The invention relates to a preparation method of medium / high-viscosity alpha,omega-dihydroxypolydimethylsiloxane, which comprises the following steps: heating low-viscosity dihydroxypolydimethylsiloxane to 160-250 DEG C under reduced pressure of -0.1 to -0.05MPa, stirring, and immediately cooling to finish the reaction when the product viscosity achieves the preset value, thereby obtaining the medium / high-viscosity alpha,omega-dihydroxypolydimethylsiloxane. The method provided by the invention does not use any catalyst or neutralizer in the reaction process, and does not need filtration, and the product yield is high; the invention has the advantages of short time and high production efficiency in the whole preparation process; the molecular weight distribution of the product is narrow; and the content of alkali metal ions in the product is very low.

The invention discloses a resonant grounding system single-phase grounding fault section positioning method integrated with high-frequency and power frequency zero-sequence component phase features, and the method comprises the steps: 1, processing a zero-sequence voltage and zero-sequence current, collected by each data collection device, through a matrix pencil algorithm, and obtaining the phases of all frequency components of the zero-sequence voltage and the zero-sequence current; 2, calculating the phase angle difference dph(50) of a zero-sequence voltage power frequency component and a zero-sequence current power frequency component of the same collection device; 3, calculating the phase angle difference dph(fm) of any one high-frequency component of the zero-sequence voltage and any one high-frequency component of the zero-sequence current; 4, calculating the absolute value dj of the difference between the phase angle difference dph(50) and the phase angle difference dph(fm); 5, recognizing a fault segment according to the size of dj. The method makes the most of the features of the high-frequency and power frequency components. Compared with a conventional resonant grounding system section position method based on transient features, the method does not need to carry out filtering.

The invention belongs to the field of coatings. Corresponding products can be applicable to industrial corrosion prevention and architectural ornament. The invention discloses a multifunctional environmental-friendly inorganic silicate coating which comprises a component A and a component B, wherein the component A comprises pigments; the component B comprises a silicate solution and a modifier. The coating is excellent in stability and excellent in film-forming effect.

The invention discloses a Doppler integration method combined with an ionospheric residual method to detect and repair a cycle slip, which comprises the following steps: a. Obtaining carrier phase and Doppler observation values ​​of two frequency points in a navigation system respectively by a receiver ; b, use the Doppler integral method to calculate the detection amount and carry out preliminary cycle slip detection to judge whether a cycle slip occurs; c, if a cycle slip occurs, the original cycle slip detection amount is corrected to within ±4 cycles; d, use the ionosphere The cycle slip is detected by the residual method, and the cycle slip detection value is obtained by the linear combination of the carrier phase, and the detection value is compared with the threshold value; if the absolute value of the ionospheric residual method detection value is greater than the threshold value, judge When a cycle slip occurs, go to step e; if the absolute value of the detected amount is less than the threshold value, it is judged that no cycle slip occurs; e, repair the cycle slip value. The method of the invention can effectively utilize the advantages of the strong cycle slip detection capability of the ionospheric residual method, and can also avoid defects that cannot be detected by the combination of cycle slips with special ratios.

A large-power wind power generation device comprises at least two fans (1), a turbine generator (2), and a solar electric heating device (3). The at least two fans (1) are communicated with an air inlet of the turbine generator (2) by means of parallel gas pipelines. The solar electric heating device (3) is electrically connected to a standby gas tank of each fan (1). The device greatly improves the installed capacity of a single set, the generating capacity is stable, the output voltage is stable, filtering and rectification are not required, the device can be interlaced and laminated in space, and the limited space of a wind field can be more effectively utilized.

The invention discloses a method for treating a crude ammonium tungstate solution. The method comprises the steps of (1) washing activated carbon powder by utilizing dilute hydrochloric acid; (2) adding an ammonium sulfide solution, a copper sulfate solution and the washed activated carbon powder into the crude ammonium tungstate solution to carry out purification treatment on the crude ammonium tungstate solution; (3) filtering the purified crude ammonium tungstate solution to obtain filter residue containing the activated carbon powder and a pure ammonium tungstate solution; and (4) carrying out evaporation crystallization on the pure ammonium tungstate solution to obtain ammonium paratungstate. By utilizing the method, a lot of sedimentation time and filtering equipment can be saved, the treatment efficiency can be significantly improved, and the treatment cost can be reduced.

The invention provides a method for separating nanometer aluminum powder with different particle sizes. The method is to disperse the nanometer aluminum powder in a dispersing agent; a dispersing system is centrifugated; and the gradient separation of the nanometer aluminum powder with different particle sizes is realized through gradual reduction of the centrifugal speed. The method, provided by the invention, is simple, feasible, high in separation efficiency and excellent in separation effect; and the particles sizes of all sections of obtained nanometer aluminum powder are not intersected and overlapped.

The invention relates to the field of automotive electronic technology and aims to provide a novel ABS (anti-lock brake system) ECU (electronic control unit) diagnosis system. The diagnosis system comprises a KLINE-to-UART (universal asynchronous receiver transmitter) conversion circuit and a TTL (transistor-transistor logic)-to-UART conversion circuit, wherein a filter circuit is arranged between the KLINE-to-UART conversion circuit and the TTL-to-UART conversion circuit; and a transmission signal fed back from a KLINE bus in the KLINE-to-UART conversion circuit is filtered out by the filter circuit. According to the novel ABS ECU diagnosis system, hardware filtering is additionally adopted, invalid feedback data from a bus is directly filtered out, the software filtering processing is omitted, so that the workload of software is reduced, and the system efficiency is improved.