77results about How to "Regulation and stability" patented technology

The invention relates to a method for regulating and controlling the stable flow of the liquid nitrogen jet flow state and belongs to the field of cryogenic engineering. According to regulation of the stable flow of the liquid nitrogen jet flow state through the method, a heat insulation pipeline is utilized to reduce heat leakage, the two-phase flow gas mass fraction is regulated and controlled within a certain range, the gasification ratio of liquid nitrogen in the delivering process is decreased, and the stable output result in the allowable range is obtained. The liquid nitrogen delivering flow is monitored in real time, and liquid nitrogen flow regulation and stable output are achieved through a PID regulating and control method. According to the method, cryogenic fluids in cryogenic medium processing are effectively stabilized, regulated and controlled, the dry degree of the liquid nitrogen in pipeline delivering is decreased, and the utilization rate of the fluids during liquid nitrogen ultra-low temperature cutting is increased. A liquid nitrogen delivering device is compact in structure, a vacuum pipeline is adopted, the heat loss in the pipeline is reduced, the liquid nitrogen gasification rate is decreased, the two-phase flow gas mass fraction is decreased, the liquid nitrogen jet flow state is stabilized, and the liquid nitrogen flow is accurately regulated and controlled.

The invention discloses a ventilating air-conditioning system for an underground hydropower station plant and an operating control method thereof. The ventilating air-conditioning system comprises a monitoring unit, an automatic control unit, an operation interface and a performing unit, wherein the monitoring unit, the operation interface and the performing unit are separately connected to the automatic control unit; the monitoring unit comprises a temperature monitoring module and a generating set operating load monitoring module which are separately used for obtaining an air temperature ofa place in which each temperature sensor is located and real-time monitoring data of the generating set operating load; the automatic control unit comprises a thermal load calculating functional module and a critical temperature calculating functional module; the performing unit consists of a plurality of pieces of ventilating air-conditioning equipment; and the operation interface is used for inputting ventilation amount of each place, ventilation amount of each variable-air-quantity operation scheme and a corresponding ventilation equipment starting condition. The ventilating air-conditioning system can control the ventilating air-conditioning operation scheme according to the generating set operating working condition and the ventilating air-conditioning system inlet air temperature, utilizes natural resources to the greatest extent, and avoids waste of energy.

A vertically-lifting air-ground dual-purpose vehicle transmission system comprises a turbine shaft type gas turbine with a constant rotation speed, wherein a front power output shaft is arranged at the front end of the turbine shaft type gas turbine, and a rear power output shaft is arranged at the rear end of the turbine shaft type gas turbine; the axis of the front power output shaft is coincided with the axis extended line of the rear power output shaft; the rear end of the rear power output shaft is in transmission connection with the front end of a rear transmission shaft through a rear coupler, and the rear end of the rear transmission shaft is in transmission connection with a power input shaft of a rear speed reducer through a rear synchronizer; the power input shaft of the rear speed reducer is positioned horizontally in the front and back; a power output shaft of the rear speed reducer is in transmission connection with a rotating shaft of a rear duct fan positioned above the rear speed reducer; the rotating shaft of the rear duct fan extends out downwards in the vertical direction. The provided vertically-lifting air-ground dual-purpose vehicle transmission system is small in size, light in weight, high in regulation and control accuracy and simple in operation and control, and can perform rapid and stable regulation and control on a vertically-lifting air-ground dual-purpose vehicle.

The invention discloses a nanometer carbon material containing heteroatoms and a preparation method and application thereof. The nanometer carbon material containing heteroatoms comprises, by weight, 6 to 12% of O and 88 to 94% of C. In an XPS pattern, a ratio of the amount of elemental O determined by peaks in a range of 531.0 to 532.5 eV to the amount of elemental O determined by peaks in a range of 532.6 to 533.5 eV is 0.3 to 1; and a ratio of the amount of elemental C determined by peaks in a range of 288.6 to 288.8 eV to the amount of elemental C determined by peaks in a range of 286.0 to 286.2 eV is 0.4 to 2. The invention also provides a dehydrogenation reaction method using the nanometer carbon material containing heteroatoms as a catalyst. The nanometer carbon material containing heteroatoms shows good catalytic activity in the dehydrogenation reaction of hydrocarbons, can obviously improve the conversion rate of raw materials, and realizes good olefin selectivity, especially high 1-butylene selectivity.

The invention relates to the field of integrated circuits, and can suppress a current mismatch problem and enhance output stability. The technical scheme of the invention is as follows: provided is asingle-ended negative feedback charge pump for a delay-locked loop, wherein sources of two PMOS transistors M1 and M2 are connected with a drain of a power supply vdd, a grid of the M2 is earthed, anda grid of the M1 is connected with a last output Vctrl; sources of PMOS transistors M5 and M6 are connected with a drain of the M1, grids of the M5 and M6 are connected, a grid voltage Vbias is 0.8V;drains of the M5 and M6 are connected with drains of NMOS transistors M3 and M4, and DN and UP signals are input into grids of the M3 and M4; sources of the M3 and M4 are connected and further connected to grids of NMOS transistors M12, M13 and M14; a grid and a drain of the M13 are connected with each other, drains of the M14 and M12 are connected with the drains of the M3 and M4. The single-ended negative feedback charge pump for the delay-locked loop provided by the invention is mainly applied to design and manufacture occasions of the integrated circuits.

The invention discloses a nanometer carbon material containing heteroatoms and a preparation method and application thereof. The nanometer carbon material containing heteroatoms comprises, by weight, 4 to 12% of elemental O, 2 to 16% of elemental N and 82 to 94% of elemental C. In a pattern of X-ray photoelectron spectroscopy, a ratio of the amount of elemental O determined by peaks in a range of 531.0 to 532.5 eV to the amount of elemental O determined by peaks in a range of 532.6 to 533.5 eV is 0.1 to 0.5; and a ratio of the amount of elemental N determined by peaks in a range of 398.5 to 400.1 eV to the amount of the total elemental N is 0.8 to 1. The invention also provides a method for a dehydrogenation reaction of hydrocarbons with the nanometer carbon material containing heteroatoms as a catalyst. The nanometer carbon material containing heteroatoms shows good catalytic performance in the dehydrogenation reaction of hydrocarbons and can obviously improve the conversion rate of raw materials and product selectivity.

The invention discloses a metal atom-containing nano carbon material as well as a preparation method and application thereof. The metal atom-containing nano carbon material comprises the following components in percentage by weight: 1-8% of an element O, 1-10% of an element N and 1-10% of metal elements, wherein the content of the element O determined by a peak at 529.5-530.8eV in an XPS (X-Ray Photoelectron Energy Spectrum) is 0.02-0.3% by weight; the ratio of the amount of the element O determined by a peak at 531.0-532.5eV to the amount of the element O determined by a peak at 532.6-533.5eV is 0.2:0.8; the ratio of the amount of the element N determined by a peak at 398.5-400.1eV to the total amount of the element N determined by the XPS is 0.6:0.95; the ratio of the amount of the element N determined at a peak at 404.0-406.5eV to the total amount of the element N is 0.05:0.35. The invention further provides a hydrocarbon dehydrogenation reaction method with the metal atom-containing nano carbon material as a catalyst. By adopting the method, relatively high raw material conversion rate and product selectivity can be achieved.

The invention discloses a nanometer carbon material containing heteroatoms and a preparation method and application thereof. The nanometer carbon material containing heteroatoms comprises, by weight, 1 to 8% of elemental O, 2 to 8% of elemental N and 84 to 97% of elemental C. In a pattern of X-ray photoelectron spectroscopy, a ratio of the amount of elemental O determined by peaks in a range of 531.0 to 532.5 eV to the amount of elemental O determined by peaks in a range of 532.6 to 533.5 eV is 1.2 to 2.5; and a ratio of the amount of elemental N determined by peaks in a range of 398.5 to 400.1 eV to the total amount of the elemental N is 0.7 to 1. The invention also provides a dehydrogenation reaction method for hydrocarbons with the nanometer carbon material containing heteroatoms as a catalyst. The nanometer carbon material containing heteroatoms shows good catalytic performance in the dehydrogenation reaction of hydrocarbons and can obviously improve the conversion rate of raw materials and product selectivity.

The invention provides a method for testing the homogeneous control effect in the threshing and redrying process. The method sequentially comprises the following steps: extracting a homogeneously controlled finished product to obtain a sample, carrying out laboratory detection on the extracted sample, recording the spectrogram and obtaining the chemical value corresponding to chemical components to be tested, and calculating the integral variation coefficient, the local variation coefficient and the covariant variation coefficient of the chemical value corresponding to the chemical components to be tested. The uniformity of sheet tobacco is evaluated through the integral variation coefficient, the local variation coefficient and the covariant variation coefficient controlled in the oriented procedure, so the effectiveness and the stability of the homogeneous control method are systemically reflected.

The invention relates to a compression packaging machine for mask production. The compression packaging machine comprises a machine body and a butt joint mechanism, wherein an inner groove is formed in the middle of the machine body; a material opening is formed in the right end part of the machine body in a penetrating mode; an end groove is formed in the side end of the middle of the inner groove; and a sliding mechanism is arranged at the inner end of the inner groove. The compression packaging machine for mask production has the beneficial effects that lubricating oil can be conveniently guided into the compression packaging machine through the material opening, and the oil can flow into a plate channel through a channel hole, so that the plate channel has a better lubricating effect,and the plate channel can be ensured to be more smooth and safe to use; and a compression plate is arranged at the inner end of the plate channel through movable connection, and an air cylinder in theprior art is arranged at the top end of the compression plate, so that the compression plate can be conveniently pushed to move at the end part of the plate channel, then a mask at the top end of thedevice body is compressed and machined, the mask can be more tightly attached, workers can conveniently package the mask, the mask is placed in an auxiliary box for storage, and the operation is extremely convenient.

The invention relates to the field of medicine, and particularly relates to a meloxicam suspension capsule and a preparation method thereof. The meloxicam suspension capsule comprises a capsule shelland meloxicam nano suspension filled in the capsule shell. By directly filling the meloxicam nano suspension in the capsule shell to form a soft capsule preparation, when the meloxicam suspension capsule preparation is orally taken, after the capsule shell is dissolved, the meloxicam suspension can directly enter a human body to be released; compared with the situation that tablets, hard capsulesand the like need to be wet again after entering the human body, the meloxicam preparation provided by the invention has the advantage of quicker distribution response; and in addition, the wrapping of the soft capsule also can solve the problem of unpleasant taste after meloxicam is dissolved, and solves the problem of poor patient compliance.

The invention relates to the field of segmental beams, in particular to a segmental beam bottom mold system. The system comprises a fine adjustment base, a foundation support, elevated supports, an adjusting device and a bottom mold. The lower end of the foundation support is provided with the fine adjustment base capable of being subjected to position adjusting relative to the foundation support,at least one elevated support is arranged on the upper end of the foundation support, the upper end of the elevated support on the uppermost is provided with the bottom mold through the adjusting device, and the adjusting device comprises a hydraulic telescopic cylinder used for carrying out angle fine adjustment on the bottom mold and a telescopic adjusting supporting rod for auxiliary supporting of the bottom mold. The segmental beam bottom mold system is reasonable in structural design, convenient to apply and control, capable of being stably regulated, high in bottom mold use rate, capable of reducing cost, suitable for the large-span segmental beam predication with the beam body bottom being in set height and also suitable for construction of segmental beams in various special shapes.

The invention discloses an electromagnetic heating device based on multiple coils and a temperature control method of the device, belongs to the technical field of electromagnetic heating, and aims tosolve the problems of non-uniform heating and low heating efficiency of a resistance coil heating mode adopted in the existing mold heating and plastic process. The device comprises a heating plate,the heating plate comprises a plurality of heating areas; each heating area comprises a control module, a PWM control module, a switching circuit, an electromagnetic coil and a current measuring resistor. The control module, the PWM control module, the switching circuit and the electromagnetic coil form a control circuit, the output end of the electromagnetic coil is connected with the control module through the current measuring resistor to form a feedback circuit, and the control circuit and the feedback circuit form a temperature control closed loop. The heating efficiency is high, all thecoils are independently controlled in a closed-loop mode, and the temperature is accurately regulated and controlled.

The invention relates to a control method and system of a household electric appliance. The method comprises the following steps: judging whether a user load exceeds a prescribed value; if so, takingthe current electricity price and the running state of the current household appliance as input quantities of a preset cloud model controller, obtaining a regulating quantity of the household appliance to regulate the household appliance; if not, updating the user load to re-judge whether the user load exceeds the prescribed value; according to the technical proposal provided by the invention, using cloud model to optimize the intelligent control of household appliances. In addition, one of the advantages of cloud model control is stable, which can reduce the difference between peak and valleyof the regulated power network without suddenly increasing or decreasing the load of the power network.

The invention relates to the technical field of circuit switch control equipment. The invention particularly relates to a hook-type switch assembly which comprises a shell, an adjusting shell and a base, the base is an L-shaped plate, a connecting rod is mounted on a transverse plate of the base through a mounting plate; a connecting sheet penetrates through the transverse plate; the top end of the connecting sheet is connected with a circuit board at the top end of a longitudinal plate; the adjusting shell is arranged between the bottom plate and the circuit board; a plurality of contact pieces for connecting a circuit are mounted on the plate surface of one side, facing the longitudinal plate, of the adjusting shell; a clamping groove is formed in the plate face of the other side of theadjusting shell, a baffle, a first guide block, a second guide block and a third guide block are arranged in the clamping groove, the top end of the connecting rod is located in the clamping groove and located at different positions along with movement of the adjusting shell, and the on-off adjustment of the switch assembly is achieved.