Abstract: Disclosed are a sintered Fe—Al based alloy porous material with high temperature oxidation resistance and a filter element using same. The porous material has a porosity of 30-60% and an average pore diameter of 0.5-50 ?m, and has that: a) it mainly consists of three elements of Fe, Al and Cr, and the total weight of these three elements accounts for at least 90% of the weight of the porous material, wherein the weight of Fe is 60-85% of the total weight of Fe and Al, and the weight of Cr is 10-30% of the total weight of Fe, Al and Cr; b) the Cr in the porous material mainly presents in the form of a chromium compound of a Fe—Al based compound, or mainly presents in the form of a chromium compound of the Fe—Al based compound and FeCr, and is almost uniformly dispersed in the porous material; and c) it has a tensile strength ?45 MPa, an air flux ?80 m3/m2·KPa·h for the sintered Fe—Al based alloy porous material with a thickness ?5 mm, a weight loss rate of at most 0.

Abstract: Disclosed is a sintered porous material with stronger corrosion resistance and a filter element using same. The sintered porous material of the present application has following features: a) it mainly consists of three elements of Ti, Si and C, and the total weight of the three elements accounts for at least 90% of the weight of the sintered porous material, wherein Ti is 60-75% of the total weight of Ti, Si and C, and Si is 10-20% of the total weight of Ti, Si and C; b) C in the sintered porous material is mainly present in the form of the Ti3SiC2 ternary MAX phase compound, and is almost uniformly dispersed in the porous material; c) the porous material has porosity of 30-60%, average pore size of 0.5-50 ?m, tensile strength of at least 23 MPa, pure water filtration flux of 1 t/m2·h at least measured under a filtration pressure difference of 0.05 MPa with a thickness of 5 mm at most for the sintered porous material, and a weight loss rate of at most 1.5% after being immersed into a 5 wt.

Abstract: Embodiments of the present invention, relating to the field of desktop cloud applications, provide a desktop-cloud-based media control method and a device, so as to reduce a bandwidth occupied by transmission of a multimedia data stream in a media control process. The method includes: acquiring, by a client, a multimedia data stream, displaying the multimedia data stream, receiving a control instruction sent by a cloud server, and performing a corresponding control operation on the displayed multimedia data stream according to the control instruction. The method embodiment is used for media control.

Abstract: A dual band communication method and a wireless local area network (WLAN) device, First determining a service type of a service in a switching period according to a preset policy, where the switching period includes one first timeslot in which a first radio frequency (RF) channel works and one adjacent second timeslot in which a second RF channel works, and determining, according to the determined service type and a preset service quality requirement corresponding to the service type, maximum duration of the switching period in which the service quality requirement is met, and when time division multiplexing (TDM) is performed on a baseband processor, controlling the switching between the first RF channel and the second RF channel according to the maximum duration, hence actual duration of the switching period is less than or equal to the maximum duration.

Abstract: Embodiments of the present invention provide a dual band adaptive concurrent processing method and apparatus. In the embodiments of the present invention, by using statistical information of a service at a first frequency band and a service at a service at a second frequency band in the Nth adjustment period, service performance of the services at the frequency bands in the adjustment period may be acquired; and based on the statistical information, and a QoS requirement that the services at the two frequency bands need to meet, a second coefficient of proportionality between timeslots occupied by the services at the two frequency bands in the (N+1)th adjustment period may be determined, so that switching control on a first channel and a second channel may be performed in the (N+1)th adjustment period according to the determined second coefficient of proportionality.

Abstract: A PET industrial yarn melt direct spinning manufacturing method and a device thereof are disclosed. The device includes a polymerizer preparing base polyester melt, liquid tackifying reactors, and multi-head spinning units. The liquid tackifying reactors are connected with the polymerizer through split-flow pipelines respectively and after tackified by the tackifying reactors, the base polyester melt has its intrinsic viscosity reaching 0.90-1.10 dL/g. Each of the liquid tackifying reactors is connected with spinning units, and the spinning units are connected to the liquid tackifying reactors through melt pipelines. Each of the spinning units is provided with spinning boxes. The device solves the transportation problem of melt with high viscosity, combines both scale efficiency of the condensation production and market demand of multiple PET industrial yarns, and has the characteristic of integrating flexible production and intensive production.

Abstract: Disclosed are a method for adjusting the pore size of a porous metal material and the pore structure of a porous metal material. The method comprises: permeating at least one element into the surface of the pores of the material to generate a permeated layer on the surface of the pores, so that the average pore size of the porous material is reduced to within a certain range, thus obtaining a pore structure of the porous metal material having the pores distributed on the surface of the material and the permeated layer provided on the surface of the pores.

Abstract: The present invention relates to valved cryogenic refrigerators, in particular, Gifford McMahon (GM) refrigerators, and GM type pulse tube refrigerators where gas is cycled between high and low pressures by a valve mechanism that connects to an expander. Input power is reduced by use of a buffer volume which stores gas that flows to and from the warm end of the regenerator through a valve that opens and closes during the periods when the main supply and return valves are closed and is closed when the main supply and return valves are open.

Abstract: A fastening device for manufacturing a fastening system is disclosed. The fastening system includes a first connecting member, a second connecting member, a rivet riveting the first connecting member and the second connecting member together, and an elastic member compressed by the rivet. The fastening device includes a rivet head forming tool, a positioning assembly positioning the first connecting member, a first driving assembly driving the rivet head forming tool to move, a second driving assembly driving the second connecting member to rotate, and a force measuring module. The force measuring module is configured for measuring the positive pressing force between the first connecting member and the second connecting member, and generating a control signal to stop the first driving assembly and the second driving assembly when the positive pressing force between the first connecting member and the second connecting member reach the predetermined force.

Abstract: A fastening system includes a first connecting member, a second connecting member, a rivet, and an elastic member. The second connecting member is positioned on the first connecting member, and defines a receiving groove. The rivet extends through the first connecting member and the second connecting member, and rivets the first connecting member and the second connecting member together. The rivet forms a riveting flange at an end adjacent to the second connecting member. The elastic member is received in the receiving groove of the second connecting member, and compressed by the riveting flange to generate a predetermined positive pressing force between the first connecting member and the second connecting member. A fastening device for manufacturing the fastening system is also provided.

Abstract: A rotary valve unit which reduces the torque required to turn the valve disc, and the amount of wear dust that is blown into the cold head, using differential gas forces to keep the valve disc in contact with the valve seat, and which enables larger diameter valve discs to be utilized for multi-ported pulse tubes that have less force on the face of the valve disc, resulting in reduced torque and reduced wear rate.

Abstract: An improved method of reducing wear dust and torque required to turn a multi-port rotary disc valve utilizes a thrust bearing to hold the valve seat and/or valve disc such that they are not in contact with each other, or have light contact each other.

Abstract: Convection losses associated with different temperature profiles in the pulse tubes and regenerators of multi-stage pulse tubes mounted in helium gas in the neck tube of a MRI cryostat are reduced by providing one or more of thermal bridges, and/or insulating sleeves between one or more pulse tubes and regenerators, and/or spacers, and spacer tubes, in one or more pulse tubes and regenerators.

Abstract: A multi valve two-stage pulse tube type GM refrigerator having a rotary valve that comprises one track for flow to the regenerator and two tracks for flow to the pulse tubes where the valve has two high pressure ports to the pulse tubes located on a single track and two low pressure ports from the pulse tubes located on a separate single track and where there are two cooling cycles per revolution of the rotary face valve.

Abstract: A magnetic shield is mounted in its own vacuum enclosure in a regenerative type expander comprising a vacuum enclosure, magnetic material in a cold regenerator, and a magnetic shield, where the magnetic shield surrounds the magnetic material.

Abstract: This invention provides an improved means of quickly warming a pulse tube (165) by shifting the phase relation of flow to the warm end of the pulse tube relative to flow to the warm end (117) of the pulse tube relative to flow to the warm end of the regenerator (160) using a “four valve” concept and the “active buffer” concept. Several different pulse tube configurations and valve timing relations that are effective at reversing the cycle from the normal mode, which produces cooling at the pulse tube heat station, to a reverse mode that produces heating are disclosed.

Abstract: Disclosed is a two-stage pulse tube cryopump cooling system in which the pulse tubes and valves are inline, with the hot ends of the pulse tubes at the top and the valve mechanism is at the bottom and the hot ends and buffer volume are cooled by an inline coolant line from the compressor input to the compressor output and attached in heat exchange relationship with the buffer volume.

Abstract: A molybdenum carbide compound is formed by reacting a molybdate with a mixture of hydrogen and carbon monoxide. By heating the molybdate powder from a temperature below 300° C. to maximum temperature 850° C., a controlled reaction can be conducted wherein molybdenum carbide is formed. A high surface area, nanograin, metastable molybdenum carbide can be formed when the reaction temperature is below 750° C. The metastable molybdenum carbide is particularly suitable for use as a catalyst for the methane dry reforming reaction and the water gas shift reaction.

Abstract: A molybdenum carbide compound is formed by reacting a molybdate with a mixture of hydrogen and carbon monoxide. By heating the molybdate powder from a temperature below 300° C. to maximum temperature 850° C., a controlled reaction can be conducted wherein molybdenum carbide is formed. A high surface area, nanograin, metastable molybdenum carbide can be formed when the reaction temperature is below 750° C. The metastable molybdenum carbide is particularly suitable for use as a catalyst for the methane dry reforming reaction and the water gas shift reaction.

Abstract: Disclosed are two-stage inter-phasing pulse tube refrigerators with and without shared buffer volumes.