59results about How to "Achieve long-term use" patented technology

The tire with the transposition time indicating hole of the present invention is provided with a transposition time indicating hole composed of multiple stepped holes on the tire tread, and the profiles and shapes of the above-mentioned stepped holes are different. The tire rotation time can be known from the change in the contour shape of the hole due to tire wear.

The invention relates to a rainwater recovery and reuse system and a rainwater utilization method. The system includes a windmill house fixed on the ground, a windmill installed on the side of the windmill house, a ground water tank installed in the windmill house, and an underground water tank arranged underground. It also includes the Archimedes pump installed on an incline, the inlet of the Archimedes pump is set in the underground water tank, the outlet of the Archimedes pump is set above the ground water tank, and the ground water tank is connected with a water outlet pipe, and the water tank above the ground water is also included. The rainwater collection device of the tank, the rainwater collection device is connected with the underground water tank through the drainage pipe, the windmill is driven by the wind, and the Archimedes pump is driven by the windmill to transport the rainwater in the underground water tank to the ground water tank, which not only saves energy, but also Long-term use of rainwater can be realized.

Disclosed is a method wherein propylene, isobutylene or a tertiary butanol is catalytically oxidized with molecular oxygen in a vapor phase for producing corresponding unsaturated aldehyde and unsaturated carboxylic acid. This method enables to use a catalyst for a long time. Specifically disclosed is a method wherein propylene, isobutylene or a tertiary butanol as a raw material is catalyticallyoxidized with molecular oxygen in a vapor phase in the presence of a catalyst, which is composed of a complex oxide essentially containing molybdenum, bismuth and iron, for producing corresponding unsaturated aldehyde and unsaturated carboxylic acid. In this method, the reaction pressure and / or the molar ratio between oxygen and the raw material are controlled so that the reaction rate of the rawmaterial is kept constant at a certain level within a temperature range of not less than (TA - 15) DEG C and not more than TA DEG C with TA DEG C being the boundary temperature of the activation energy of the catalyst.

The invention relates to a cooling device generating a flat jet and a manufacturing method thereof, the cooling device is characterized in that an inner pipe and an outer pipe of the cooling device are eccentrically fixed through a positioning strip for forming a cavity between the inner pipe and the outer pipe, a slit is formed in the axial direction, the width of the slit can be regulated through a tightening bolt and a compression bolt, a flange is welded at the inlet end of the inner pipe for connecting with a cooling medium pipeline, a steel plate is welded at the outlet end for sealing, and the cooling device is further provided with an inner cavity pollution discharge port. An end plate is welded at the inlet end of the cavity between the inner pipe and the outer pipe and used for sealing, the outlet end of the cavity and the flange are sealed through the end plate, and pollution can be discharged out of the cavity between the inner pipe and the outer pipe. Two rows of tidy flow through holes are formed on the inner pipe, and a cooling medium enters into the inner pipe via the flange at the inlet end, and then flows into the cavity between the inner pipe and the outer pipe via the flow through holes and further forms flat jet via the slit for cooling the steel plate. The eccentric arrangement of the inner pipe and the outer pipe of the device can form multiple damping effects for the cooling medium, the slit enables the cooling medium to form the uniform flat jet in the width direction of a rolling line, and multiple reinforcing ribs are welded outside the outer pipe in the radial direction for preventing deformation.

The invention relates to a safe and high-energy-efficiency cognitive D2D communication method. The method comprises the steps of performing channel quality evaluation on a small cell base station andcognitive users; establishing a joint resource allocation model about wireless charging power and wireless charging time; calculating an optimal resource distribution result by adopting an iterative optimization algorithm; transmitting the radio frequency signal at the optimal wireless charging power; the cognitive user collects radio frequency signal energy within the optimal wireless charging time; and the small cell base station interferes with the eavesdropper with the optimal wireless charging power, and the cognitive user sets the maximum feasible transmitting power of the small cell base station and performs cognitive D2D communication. The method is oriented to an ultra-dense small cellular network; the cognitive radio technology is used for achieving spectrum sharing, the energy collection technology is used for conducting wireless charging on cognitive users, meanwhile,interference is conducted on eavesdroppers through manual noise, safe and high-energy-efficiency cognitive D2D communication can be achieved, and the spectrum efficiency, the energy efficiency and the physical layer safety are effectively improved.