Abstract: The present invention discloses a hydrate energy-storage temperature-control material and a preparation method therefor. The material includes a refrigerant hydrate and a cross-linked polymer. The preparation method comprises the following steps: first, preparing a refrigerant hydrate by using a high-pressure reactor, and conducting grinding, crushing and sieving to obtain hydrate particles; then, uniformly spraying polytetrafluoroethylene suspended ultrafine powder onto the surface of the hydrate particles by using an electrostatic spraying device, and putting the hydrate particles into a plasma instrument to modify polytetrafluoroethylene so as to allow free radicals to be formed on the polytetrafluoroethylene powder surface; finally, subjecting monomers to graft polymerization with the free radicals on the polytetrafluoroethylene surface under the irradiation of a high-pressure mercury lamp of UV lighting system to stabilize the structure of the material, preparing a final product.

Abstract: A resonance conversion device and a universal serial bus circuit are provided. The resonance conversion device includes an input filter circuit, a full-bridge LLC converter circuit, a transformer circuit, a rectifier filter circuit, and a controller. The controller is configured to determine whether an indication voltage of a voltage command is less than or equal to a threshold value and to perform the following steps: in response to the indication voltage being less than or equal to the threshold value, controlling the full-bridge LLC converter circuit into a half-bridge operation mode, and regulating the DC output voltage by performing half-bridge burst mode control on the full-bridge LLC converter circuit based on the DC output voltage; and in response to the indication voltage being greater than the threshold value, regulating the DC output voltage by performing full-bridge burst mode control on the full-bridge LLC converter circuit based on the DC output voltage.

Abstract: The disclosure discloses a methane value online real-time monitoring system, which includes a laser tunable system portion, a gas component detection system portion and a data processing system portion. The laser tunable system portion includes a computer, laser drivers, tunable lasers, a laser beam combiner, a collimator, and a beam expander, which are connected in sequence. The gas component detection system portion includes a gas supply system pipeline, a hose, a valve, and a gas chamber. The data processing system portion includes a detector, lock-in amplifiers, an oscilloscope, and a data acquisition card, which are connected in sequence. In a working process of the methane value online real-time monitoring system, gas mass namely the methane value change can be monitored in real time on line by collecting natural gas introduced into a combustion chamber through a gas supply system pipeline of a natural gas engine.

Abstract: An electrocardiogram (ECG) sensor has a flexible thin ring-shaped substrate configured to be worn about a patient's finger. The substrate has an inner surface and an outer surface opposite the inner surface. A first ECG electrode is positioned at the outer surface of said substrate and a second ECG electrode is positioned at the inner (or outer) surface of the said substrate in contact with the finger (or the adjacent finger if the electrode is on the outer surface), whereby the two ECG electrodes receives a single-lead. ECG signal when the first electrode is touched to the patient's body. Touching different locations on the body or wearing multiple rings can provide multi-lead ECG measurements. The ring shape can be converted to a wearable patch for continuous ECG measurements.

Abstract: The disclosure discloses a methane value online real-time monitoring system, which includes a laser tunable system portion, a gas component detection system portion and a data processing system portion. The laser tunable system portion includes a computer, laser drivers, tunable lasers, a laser beam combiner, a collimator, and a beam expander, which are connected in sequence. The gas component detection system portion includes a gas supply system pipeline, a hose, a valve, and a gas chamber. The data processing system portion includes a detector, lock-in amplifiers, an oscilloscope, and a data acquisition card, which are connected in sequence. In a working process of the methane value online real-time monitoring system, gas mass namely the methane value change can be monitored in real time on line by collecting natural gas introduced into a combustion chamber through a gas supply system pipeline of a natural gas engine, and the knocking problem related to rapid change of the gas mass is solved.

Abstract: An electrocardiogram (ECG) sensor has a flexible thin ring-shaped substrate configured to be worn about a patient's finger. The substrate has an inner surface and an outer surface opposite the inner surface. A first ECG electrode is positioned at the outer surface of said substrate and a second ECG electrode is positioned at the inner (or outer) surface of the said substrate in contact with the finger (or the adjacent finger if the electrode is on the outer surface), whereby the two ECG electrodes receives a single-lead ECG signal when the first electrode is touched to the patient's body. Touching different locations on the body or wearing multiple rings can provide multi-lead ECG measurements. The ring shape can be converted to a wearable patch for continuous ECG measurements.

Abstract: The present disclosure relates to the technical field of cranes, and in particular to a crane hydraulic control system and a crane. The crane hydraulic control system of the present disclosure includes a prime mover, an execution control mechanism, a hydraulic baking device, a running energy recycling device and an operation energy recycling device. By means of cooperation among the operation energy recycling device, the energy recovery device and the hydraulic energy conversion device, kinetic energy in a driving braking process of the crane and the potential energy in a load lowering process are respectively converted into hydraulic energy for recovery, storage and reuse, therefore, the present disclosure can achieve the recovery of the superstructure energy and the lower vehicle energy of the crane so as to effectively reduce the energy waste.

Abstract: The present invention discloses a power transmission control method and device for a crane and the crane. The method includes: setting the maximum working displacement of a secondary element corresponding to each gear of the crane; determining the current gear state and specific gear of the crane; determining the working mode of the secondary element from the gear state, and setting the maximum allowable displacement of the secondary element as the maximum working displacement corresponding to the specific gear.

Abstract: Systems comprising a microfluidic device are provided for maintaining and analyzing tissue slices. Methods for maintaining tissue slices in a microfluidic device are further provided.

Abstract: The present disclosure relates to the technical field of cranes, and in particular to a crane hydraulic control system and a crane. The crane hydraulic control system of the present disclosure includes a prime mover, an execution control mechanism, a hydraulic baking device, a running energy recycling device and an operation energy recycling device. By means of cooperation among the operation energy recycling device, the energy recovery device and the hydraulic energy conversion device, kinetic energy in a driving braking process of the crane and the potential energy in a load lowing process are respectively converted into hydraulic energy for recovery, storage and reuse, therefore, the present disclosure can achieve the recovery of the superstructure energy and the lower vehicle energy of the crane so as to effectively reduce the energy waste.

Abstract: The invention relates to a cylinder head body, a single cylinder bolt system and a crane, wherein, the cylinder head body comprises at least two branch bodies of cylinder head body, a cooperative positioning structure and a fixed connection structure are provided between two adjacent branch bodies of cylinder head body of the at least two branch bodies of cylinder head body, the branch body of cylinder head body has a cylindrical branch body structure, the cylindrical branch body structures of the at least two branch bodies of cylinder head body are cooperatively positioned by means of the cooperative positioning structure and are detachably connected by means of the fixed connection structure to form a barrel.

Abstract: The present application relates to a mobile counterweight mechanism of a hoisting machine, comprising a support portion, a drive portion and a counterweight which is articulated to said support portion by means of a first articulation portion, said drive portion connected between said support portion and the counterweight so that said counterweight turns over outwards about said first articulation portion relative to a center of rotation of said hoisting machine, so as to increase a distance between a center of gravity of said counterweight and a center of rotation of said hoisting machine. The present application also relates to a hoisting machine. The present application raises a movement distance of a mobile counterweight and improves the overall stability of a hoisting machine in a turnover manner.

Abstract: The present invention relates to a single-cylinder plug pin type telescopic arm, a crane and a telescopic method thereof. The single-cylinder plug pin type telescopic arm includes a basic arm and at least one telescopic arm sleeved in the basic arm, wherein coaxial center holes are formed in the tails of the telescopic arms, and a telescopic oil cylinder is arranged in the center holes; the telescopic oil cylinder includes a cylinder rod and a cylinder barrel, at least two cylinder heads are fixedly sleeved on the outer side of the cylinder barrel in the longitudinal direction, and at least three arm pin holes are formed in each of the basic arm and the telescopic arms in the longitudinal direction.

Abstract: The invention relates to a cylinder head body, a single cylinder bolt system and a crane, wherein, the cylinder head body comprises at least two branch bodies of cylinder head body, a cooperative positioning structure and a fixed connection structure are provided between two adjacent branch bodies of cylinder head body of the at least two branch bodies of cylinder head body, the branch body of cylinder head body has a cylindrical branch body structure, the cylindrical branch body structures of the at least two branch bodies of cylinder head body are cooperatively positioned by means of the cooperative positioning structure and are detachably connected by means of the fixed connection structure to form a barrel.

Abstract: An electrocardiogram (ECG) sensor has a flexible thin ring-shaped substrate configured to be worn about a patient's finger. The substrate has an inner surface and an outer surface opposite the inner surface. A first ECG electrode is positioned at the outer surface of said substrate and a second ECG electrode is positioned at the inner (or outer) surface of the said substrate in contact with the finger (or the adjacent finger if the electrode is on the outer surface), whereby the two ECG electrodes receives a single-lead ECG signal when the first electrode is touched to the patient's body. Touching different locations on the body or wearing multiple rings can provide multi-lead ECG measurements. The ring shape can be converted to a wearable patch for continuous ECG measurements.

Abstract: The present application relates to a mobile counterweight mechanism of a hoisting machine, comprising a support portion, a drive portion and a counterweight which is articulated to said support portion by means of a first articulation portion, said drive portion connected between said support portion and the counterweight so that said counterweight turns over outwards about said first articulation portion relative to a center of rotation of said hoisting machine, so as to increase a distance between a center of gravity of said counterweight and a center of rotation of said hoisting machine. The present application also relates to a hoisting machine. The present application raises a movement distance of a mobile counterweight and improves the overall stability of a hoisting machine in a turnover manner.

Abstract: A power transmission control method and device for a crane and the crane includes setting the maximum working displacement of a secondary element corresponding to each gear of the crane; determining the current gear state and specific gear of the crane; determining the working mode of the secondary element from the gear state, and setting the maximum allowable displacement of the secondary element as the maximum working displacement corresponding to the specific gear. In the power transmission control method and device for the crane and the crane of the present invention, the maximum displacement of the secondary element is controlled for various gears, which can reduce power impact. A buffer mode is added to avoid influence on a vehicle due to loss of instant power generated at the moment of energy release completion and avoid vehicle jitter due to instable power resulting from the vehicle at low speed or a system suddenly disconnected.

Abstract: The present invention relates to a single-cylinder plug pin type telescopic arm, a crane and a telescopic method thereof. The single-cylinder plug pin type telescopic arm includes a basic arm and at least one telescopic arm sleeved in the basic arm, wherein coaxial center holes are formed in the tails of the telescopic arms, and a telescopic oil cylinder is arranged in the center holes; the telescopic oil cylinder includes a cylinder rod and a cylinder barrel, at least two cylinder heads are fixedly sleeved on the outer side of the cylinder barrel in the longitudinal direction, and at least three arm pin holes are formed in each of the basic arm and the telescopic arms in the longitudinal direction.

Abstract: The present invention discloses a method for detackifying organic contaminants in the process of pulping and papermaking and a composition used for the same. Specifically, the invention discloses that the water circulation system of pulping and papermaking process can be provided with non-ionic cellulose ether and cationic coagulant in lower amount, through which, the de position of organic contaminants can be inhibited under the synergistic action of pre-coagulation and detackification.

Abstract: A multi-fuel pre-mixed combustion system of an internal combustion engine includes a main fuel spray nozzle (2), which injects a mixed fuel of compression-ignition-suitable fuels, spark-ignition-suitable fuel, or a wide cut fuel to form a homogeneous primary pre-mixed gas. An auxiliary spray nozzle (4) injects a spark-ignition-suitable fuel to form a secondary mixed gas, which is ignited by the spark plug (3) by means of spray guiding or an ignition chamber (5), and the primary pre-mixed gas in the combustion chamber (1) is compression ignited. Consequently, the ignition point of the primary mixed gas is effectively controlled and knock is avoided, and a homogeneous pre-mixed compression ignition is achieved over the whole range of operating conditions. The combustion rate is controlled by exhaust gas recirculation or spray of water into a cylinder or intake port, and high thermal efficiency is ensured by a high expansion ratio.