Abstract: The antenna structure includes a substrate, a ground layer, a feeding unit, an antenna unit, and an inductive element. The ground layer is disposed on the substrate. The feeding unit is disposed on the substrate. The antenna unit is disposed on the substrate and connected to the ground layer. The feeding unit and the antenna unit are indirectly connected. One end of the inductive element is electrically connected to the feeding unit, and another end of the inductive element is electrically connected to the antenna unit.

Abstract: A catalyst for preparing chloroethylene by cracking 1,2-dichloroethane and a preparation and regeneration method thereof are disclosed in the present application. A catalyst for preparing chloroethylene by cracking 1,2-dichloroethane includes a carrier and a nitrogen-containing carbon as an active component of the catalyst with the nitrogen-containing carbon being loaded on the carrier. The method for preparing the catalyst includes: supporting an organic matter on an inorganic porous carrier and then performing a carbonization-nitridation process by pyrolysis in an atmosphere containing the nitrogen-containing compound. The method for regenerating the catalyst includes: calcinating the catalyst with deactivated carbon deposit in an oxidizing atmosphere to remove all the carbonaceous portions on the surface, and repeating the above preparation process of the catalyst.

Abstract: An antenna structure includes a ground element, a metal mechanism element, a feeding element, a first connection element, a second connection element, and a shorting element. The metal mechanism element has a slot. The slot has a first edge and a second edge which are opposite to each other. The feeding element extends across the slot. A signal source is coupled through the feeding element to a feeding point on the first edge. The first connection element is coupled between a first connection point on the first edge and a second connection point on the second edge. The second connection element is coupled between a third connection point on the first edge and a fourth connection point on the second edge. A first grounding point on the second edge is coupled through the shorting element to the ground element.

Abstract: A method for preparing a supported carbon catalyst, the method includes at least the following steps: contacting a gas containing an organic silicon source with a silicon oxide-based material to obtain a precursor; contacting the precursor with a gas containing an organic carbon source to obtain the supported carbon catalyst. The temperature and energy consumption of the chemical vapor deposition of heteroatom-containing carbon material on silica-based materials can be greatly reduced in this method, and the cost of the catalyst can be effectively reduced.

Abstract: A method for preparing a supported carbon catalyst, the method includes at least the following steps: contacting a gas containing an organic silicon source with a silicon oxide-based material to obtain a precursor; contacting the precursor with a gas containing an organic carbon source to obtain the supported carbon catalyst. The temperature and energy consumption of the chemical vapor deposition of heteroatom-containing carbon material on silica-based materials can be greatly reduced in this method, and the cost of the catalyst can be effectively reduced.

Abstract: An antenna structure includes a substrate, a first polarization antenna group, and a second polarization antenna group. The substrate is defined with a first axis and a second axis. The first polarization antenna group and the second polarization antenna group are disposed on the substrate. The first polarization antenna group includes a first dipole antenna, a second dipole antenna, and a first wire. The first wire is separate from and coupled to the first dipole antenna and the second dipole antenna. The second polarization antenna group includes a third dipole antenna, a fourth dipole antenna, and a second wire. The second wire is separate from and coupled to the third dipole antenna and the fourth dipole antenna.

Abstract: An antenna structure includes a ground element, a metal mechanism element, a feeding element, a first connection element, a second connection element, and a shorting element. The metal mechanism element has a slot. The slot has a first edge and a second edge which are opposite to each other. The feeding element extends across the slot. A signal source is coupled through the feeding element to a feeding point on the first edge. The first connection element is coupled between a first connection point on the first edge and a second connection point on the second edge. The second connection element is coupled between a third connection point on the first edge and a fourth connection point on the second edge. A first grounding point on the second edge is coupled through the shorting element to the ground element.

Abstract: A urine testing strip and a urine testing system are provided. The urine testing system includes the urine test strip and a detection device. The urine test strip includes a working electrode, a counter electrode, a reference electrode, a trigger circuit and a protection layer. The protection layer covers the working electrode, the counter electrode and the reference electrode, and portions of the working electrode, the counter electrode and the reference electrode are exposed through an opening of the protection layer. The detection device includes a test strip receiving module and a wireless transmission module. The test strip receiving module is used to receive the test strip and to provide electric power to the test strip for obtaining a detection result. The wireless transmission module is used to transmit the detection result to a mobile computer device.

Abstract: An antenna structure includes a substrate, a first polarization antenna group, and a second polarization antenna group. The substrate is defined with a first axis and a second axis. The first polarization antenna group and the second polarization antenna group are disposed on the substrate. The first polarization antenna group includes a first dipole antenna, a second dipole antenna, and a first wire. The first wire is separate from and coupled to the first dipole antenna and the second dipole antenna. The second polarization antenna group includes a third dipole antenna, a fourth dipole antenna, and a second wire. The second wire is separate from and coupled to the third dipole antenna and the fourth dipole antenna.

Abstract: A catalyst for preparing chloroethylene by cracking 1,2-dichloroethane and a preparation and regeneration method thereof are disclosed in the present application. A catalyst for preparing chloroethylene by cracking 1,2-dichloroethane includes a carrier and a nitrogen-containing carbon as an active component of the catalyst with the nitrogen-containing carbon being loaded on the carrier. The method for preparing the catalyst includes: supporting an organic matter on an inorganic porous carrier and then performing a carbonization-nitridation process by pyrolysis in an atmosphere containing the nitrogen-containing compound. The method for regenerating the catalyst includes: calcinating the catalyst with deactivated carbon deposit in an oxidizing atmosphere to remove all the carbonaceous portions on the surface, and repeating the above preparation process of the catalyst.

Abstract: A test device for wireless electronic devices includes a metal casing, a RF-absorbing material, a measurement antenna, and an impedance adjustment module. The impedance adjustment module includes a dielectric layer, a microstrip line, and a slot line, wherein the slot line is electrically connected to the measurement antenna. The microstrip line and the slot line are disposed on two opposite sides of the dielectric layer and respectively include a first body and a second body, which are parallel to each other.

Abstract: An exercising machine includes a base frame having two positioning plates each of which has equiangularly spaced locating holes, and two crank arms respectively pivoted to the positioning plates. Two dampers are respectively coupled to the crank arms to impart a damping resistance during operation of the crank arms. Two positioning members are respectively movably mounted on the crank arms for selectively engaging into the locating holes of the positioning plates to secure the crank arms at a desired angle. Two spring members are sleeved onto the positioning members for forcing the positioning members into engagement with the locating holes of the positioning plates. Two levers are respectively pivoted to the crank arms for operation by the user to pull the positioning members away from the locating holes of the positioning members through a respective traction member.

Abstract: An exerciser for exercising different parts of the body includes a base, two uprights mounted on the base, two transverse bars respectively fastened to the uprights at the top, a guide rail connected between the transverse bars, two rollers pivotally movably supported on the guide rails, two weight holders movably supported on the upright, a plurality of weights detachably mounted on the weight holders, two cord members, which have the respective first end respectively connected to the weight holders and a respective second end respectively mounted with a grip for pulling by the user.

Abstract: A folding collapsible exercising machine includes a base frame that can rock on the floor and is provided with a seat pad, two damping spring members adjustably mounted in the base frame for adjusting damping resistance to the base frame during operation of the exercising machine to rock the base frame on the floor, a T-shaped leg extension bar pivoted to the base frame and locked in the operative position with a detachable lock screw, and a collapsible handlebar provided at the top side of the T-shaped leg extension bar.

Abstract: A stretching exerciser includes a seat bar supported on a collapsible spring bar at a base in a backwardly tilted position. A back cushion is pivotally fastened with a top end of the seat bar and forwardly backwardly turnable relative to the seat bar. The back cushion is closely attached to the seat bar due to the effect of the gravity weight when receiving no external force. A seat is pivoted to the seat bar. An axle is adjustably mounted on a front side of seat bar to selectively support the seat between two elevational positions.

Abstract: A powered body inversion exerciser includes a body having a base and an inversion table pivoted to the base, a power controller, which has a power-generating circuit, a spare power circuit, a power drive circuit for driving the inversion table to rotate relative to the base, and a safety control circuit all electrically connected together, and a hand control display electrically connected to the power controller. The spare power circuit provides electricity to the safety control circuit for returning the inversion table from an inversion position to an upright position when the supply of electricity of the power-generating circuit is abnormal. The hand control display is operated by a user to send a control signal to the power controller for controlling operation of the power controller.

Abstract: A rowing machine is constructed to include a sloping angle-adjustable base frame, a foot rack selectively and pivotally mounted on the base frame at the front side, a rocker arm coupled with a detachable handlebar for rowing exercise to stretch elastic cord members, a slide slidably mounted on two parallel rails of the base frame to support a seat and a collapsible back, and two elastic pull cords detachably fastened to the base frame for pulling by the user sitting on the seat.

Abstract: A folding collapsible rowing machine is constructed to include a folding collapsible base frame equipped with a foot frame at the front side, a sliding seat horizontally slidably supported on the main shaft of the base frame, a rocker fastened pivotally with the main shaft of the base frame in front of the sliding seat, elastic cord members connected between the front end of the main shaft of the base frame and the sliding seat, and a friction wheel block unit coupled between the sliding seat and the rocket and adapted to impart a resisting force to the user.

Abstract: An electric exercise machine includes a support member, a rotatable frame rotatably mounted to a top of the support member, a driving device mounted on the support member and having an electric motor for driving the rotatable frame to turn, and a controller for manually activating the motor of the driving device to run to enable the rotatable frame to turn to a predetermined angle.