142results about How to "Appropriate speed" patented technology

The invention relates to a method for preparing a graphite-phase carbon nitride (g-C3N4) material. The method includes the steps that a carbon nitride precursor and ammonium salt are evenly mixed, and then calcination is conducted so that the porous g-C3N4 material can be obtained. The ammonium salt is any one of ammonium base salts capable of generating ammonia gas through thermal decomposition or is the combination of at least two of the ammonium base salts. In the preparation process of the g-C3N4 material, the ammonium salt is added into the carbon nitride precursor to be mixed. In the high-temperature calcining process, the ammonium salt is subjected to pyrogenic decomposition to generate gas, a pore-forming effect on the g-C3N4 material is achieved, and the cellular porous g-C3N4 material is obtained. In the preparation process of the g-C3N4 material, template agents are not used, and thus the method is simple, efficient and environmentally friendly; the prepared g-C3N4 material is high in photocatalytic activity and can be used in the pollution control processes such as exhaust gas and wastewater treatment.

A vacuum evacuation device 2 of the invention comprises a vacuum pump 4,5 for exhausting a gas G2 in a process chamber 21 into which a process gas G1 is introduced and in which a process reaction is performed, to form a vacuum in said process chamber 21; and a control means 6 for performing a first control that regulates the rotational speed of said vacuum pump 4,5 such that a pressure condition in said process chamber 21 reaches a pressure condition suitable for said process reaction during said process reaction, wherein said control means 6 calculates a specified rotational speed for said vacuum pump 4,5 based on process information related to said process reaction, and performs a second control that brings said vacuum pump 4,5 to said specified rotational speed before said first control. The vacuum evacuation device 2 is capable of bringing the pressure in a process chamber 21 to the target pressure in a short period without a vacuum pump 4,5 being overloaded, regardless of the process reaction condition.

The invention discloses an ore dressing method for removing pyrrhotite from iron ore. The ore dressing method for removing the pyrrhotite from the iron ore includes that performing crushing, ore grinding, grading and low intensity magnetic separation techniques to obtain low intensity magnetic concentrate, wherein the TFE grade of the low intensity magnetic concentrate is more than or equal to 65.0%, and the low intensity magnetic concentrate comprises 0.5-1.4% of S; carrying out reverse flotation roughing and reverse flotation selection on the low intensity magnetic concentrate to obtain low-pyrite concentrate with less than 0.15% of S. Weighted by the dry ore amount for the reverse flotation, the reverse flotation roughing chemical comprises (1) pH regulating agent, to be specific, 800-1200 g / t of sulfuric acid; (2) activating agent, to be specific, 80-150 g / t of copper sulfate; (3) collecting agent, to be specific, 250-400 g / t of iso-butyl xanthate and 150-250 g / t of butyl dithiophosphate; (4) foaming agent, to be specific, 30-70 g / t of 2# oil. The ore dressing method for removing the pyrrhotite from the iron ore uses the butyl dithiophosphate and butyl xanthate or iso-butyl xanthate to form sulfur content reducing chemical mixture, the molecular arrangement between the chemical micelles is improved to form a synergistic effect, the chemical is good for mineralizing and adsorbing, the hydrophobicity and the floating speed are properly reinforced, and the sulfur content of the iron concentrate is reduced to less than or equal to 0.03-0.15%. The ore dressing method for removing the pyrrhotite from the iron ore is especially suitable for removing the pyrrhotite from the iron ore with pyrrhotite through reverse flotation.

An aircraft engine, an electric taxi system and a corresponding method are provided to facilitate taxiing without operation of the core gas turbine engine by driving the fan assembly with the electric taxi system during taxi operations. An aircraft engine is provided that includes a core gas turbine engine including a compressor, a combustor and a high pressure turbine. The aircraft engine also includes a fan assembly coupled to the core gas turbine engine. The aircraft engine further includes an electric taxi system coupled to the fan assembly. The electric taxi system includes an energy storage device and a motor responsive to energy provided by the energy storage device. The motor is coupled to the fan assembly and is configured to drive the fan assembly during taxi operations.

A gas powered toy gun comprises a gas supplying portion from which a gas leading passage extends, a valve for controlling the gas leading passage to be open and closed selectively, a slider provided to be movable to a barrel portion connected with a bullet holding chamber and provided with a pressure receiving portion for moving backward in order to supply the bullet holding chamber with a sham bullet, a movable member having an inner space formed therein and provided to be movable in the slider so as to be put selectively in a first state wherein the inner space is coupled with the gas leading passage and in a second state wherein the inner space is removed from the gas leading passage for guiding gas flowing through the gas leading passage to the bullet holding chamber through the inner space so that the sham bullet put in the bullet holding chamber is shot with pressure of gas acting thereon and for guiding further the gas flowing through the gas leading passage to the pressure receiving portion through the inner space so that the slider is moved backward with pressure of gas acting on the pressure receiving portion, and gas flow adjusting means provided in the inner space formed in the movable member for adjusting the amount of gas flowing through the inner space to the pressure receiving portion in response to pressure of gas led into the inner space.

The modeling of a DSA step within a virtual fabrication process sequence for a semiconductor device structure is discussed. A 3D model is created by the virtual fabrication that represents and depicts the possible variation that can result from applying the DSA step as part of the larger fabrication sequence for the semiconductor device structure of interest. Embodiments capture the relevant behavior caused by polymer segregation into separate domains thereby allowing the modeling of the DSA step to take place with a speed appropriate for a virtual fabrication flow.

A transmission for a working vehicle equipped with an engine having a horizontal engine output shaft, pair of transaxles for driving right and left drive wheels at variable speeds, and working device comprises a horizontal input shaft, output shaft, first gear train, horizontal PTO shaft, second gear train, PTO clutch and casing. An axial end of the input shaft connects to a flywheel of the engine. The output shaft drivingly connects to the transaxles. The first gear train transmits power from the input shaft to the output shaft. The PTO shaft extends parallel to the input shaft, and is provided with a universal joint connected to the working device. The second gear train transmits power from the input shaft to the PTO shaft via the PTO clutch. The casing supports the input and output shafts and incorporates the first and second gear trains and the PTO clutch.

An image forming apparatus is provided which includes an image formation unit for forming images on a recording medium; a first transporting path for discharging a recording medium to a sheet discharge device; a longer second transporting path for reversing the transportation direction of the recording medium; a transporting path switching unit for switching between the first transporting path or the second transporting path; a setting unit for setting the discharge speed for discharging the recording medium from the first and second transporting paths to a recording sheet stacking unit, and also setting the reverse transportation speed; and a determining unit for determining whether or not the sheet discharge device has been connected to the image forming apparatus; wherein the setting unit sets a first discharge speed slower than the reverse transportation speed in the event that the sheet discharge device has not been connected, and otherwise sets a faster second discharge speed.

A water pump device for electric appliances includes a water container, a piston cylinder, and an AC synchronous motor. The piston cylinder includes a piston. The AC synchronous motor drives the piston to reciprocate. The water container supplies water through reciprocation of the piston driven by the AC synchronous motor. The water in the water container enters the piston cylinder for pressurization. The pressurized water enters a heating member of a steam generator to output high temperature and high pressure steam. The water pump device further includes a steam adjustment knob between the clockwise check valve and the piston cylinder. The steam adjustment knob can be turned to drive a cam which is used to change the movement route of the piston, so that the volume of the pressurized water can be adjusted for desired high temperature and high pressure steam.

A control system for a vehicle includes an ECU, a front wheel speed sensor, a rear wheel speed sensor, and an engine. The ECU detects an actual slip speed and an actual slip ratio of a rear wheel on the basis of respective detected values of a front wheel speed sensor and a rear wheel speed sensor. Slip speed traction control is started when the actual slip speed exceeds a threshold value of a slip speed when a vehicle is at a low speed, and slip ratio traction control is started when the actual slip ratio exceeds a threshold value of a slip ratio when it is at an intermediate or high speed. An output of the engine is adjusted depending on the actual slip speed in the slip speed traction control, while being adjusted depending on the actual slip ratio in the slip ratio traction control.

An aircraft engine, an electric taxi system and a corresponding method are provided to facilitate taxiing without operation of the core gas turbine engine by driving the fan assembly with the electric taxi system during taxi operations. An aircraft engine is provided that includes a core gas turbine engine including a compressor, a combustor and a high pressure turbine. The aircraft engine also includes a fan assembly coupled to the core gas turbine engine. The aircraft engine further includes an electric taxi system coupled to the fan assembly. The electric taxi system includes an energy storage device and a motor responsive to energy provided by the energy storage device. The motor is coupled to the fan assembly and is configured to drive the fan assembly during taxi operations.

A semiconductor memory device in which information is written into a storage element by flowing current. The semiconductor memory device has a shortened write speed and reduced power consumption by preventing parasitic capacitors from prolonging the time required for a write current to reach a predetermined value. The semiconductor memory device includes storage elements for storing information, a constant current source for writing information into the storage element by flowing current, and a boost circuit for charging parasitic capacitors by a time when an amount of a current flowed by the constant current source reaches an amount of a current required to write information into the storage element, at a predetermined position related to the storage element.

The modeling of a DSA step within a virtual fabrication process sequence for a semiconductor device structure is discussed. A 3D model is created by the virtual fabrication that represents and depicts the possible variation that can result from applying the DSA step as part of the larger fabrication sequence for the semiconductor device structure of interest. Embodiments capture the relevant behavior caused by polymer segregation into separate domains thereby allowing the modeling of the DSA step to take place with a speed appropriate for a virtual fabrication flow.

Provided is a clutch control device for a work machine capable of controlling a fan to an appropriate rotational speed. In the clutch control device for the work machine, a controller includes a target fan rotational speed calculation module that calculates a target fan rotational speed for the fan, a clutch characteristic curve storage module that stores a plurality of clutch characteristic curves, a clutch command calculation module that outputs with reference to a clutch characteristic curve a first clutch control signal corresponding to the target fan rotational speed, a feedback control module that output a second clutch control signal based on the difference between the target fan rotational speed and an actual fan rotational speed, and an adder that adds the first clutch control signal and the second clutch control signal to output a third clutch control signal.