Abstract: A floating heat sink includes an elastic support and a heat dissipating piece. The elastic support is integrally formed and includes at least two fasteners and at least two elastic arms. The fasteners are configured to mount the heat dissipating piece. All the fasteners and all the elastic arms are arranged around the heat dissipating piece. Two ends of the elastic arm are both connected to the fastener, and the two ends of the elastic arm are arranged in a circumferential direction of the heat dissipating piece. A middle part of the elastic arm is configured to be connected to a board in a fastened manner, and the middle part of the elastic arm is bent toward the board.

Abstract: The disclosure provides application of sulfated polysaccharides in resisting novel coronavirus, belonging to the technical field of biomedicine. It is confirmed in the disclosure that by binding to an S protein on the surface of the SARS-CoV-2 virus, the sea cucumber polysaccharides, fucoidans or carrageenans can prevent cell membranes of body cells from adsorbing and internalizing the SARS-CoV-2 virus, thereby preventing the SARS-CoV-2 virus from infecting the body cells, which indicates that the sea cucumber polysaccharides, fucoidans or carrageenans have the effect of prevention and treatment of pneumonia caused by the novel coronavirus. These polysaccharides can be used to prepare protective articles having functions of prevention and treatment of novel coronavirus infection, for example: inhalations, hand lotions, oral liquids and respirators.

Abstract: A mask-based partition preheating device and method are provided. The device includes an overall heating light source and a local preheating light source. A substrate provided at a forming cylinder is configured to heat an underlying powder. A mask plate is provided between the local preheating light source and the overall heating light source. A powder material to be sintered is coated on a local preheating zone. The local preheating light source, the mask plate and the overall heating light source are all connected to a temperature controller. A temperature control probe and a thermal imager in a temperature monitor are disposed in a working chamber for detecting the temperature of the powder surface.

Abstract: A mask-based partition preheating device and method are provided. The device includes an overall heating light source and a local preheating light source. A substrate provided at a forming cylinder is configured to heat an underlying powder. A mask plate is provided between the local preheating light source and the overall heating light source. A powder material to be sintered is coated on a local preheating zone. The local preheating light source, the mask plate and the overall heating light source are all connected to a temperature controller. A temperature control probe and a thermal imager in a temperature monitor are disposed in a working chamber for detecting the temperature of the powder surface.

Abstract: An on-line intelligent control method for the cooling characteristics of a quenching liquid in heat treatment production includes the steps of: step 1: subjecting a workpiece to thermal insulation; step 2: measuring the cooling characteristics and the heat transfer coefficient of a quenching liquid followed by correction; step 3: starting cooling; step 4: then changing the internal circulation rate; and step 5: removing the workpiece. This scheme can effectively avoid the problem that the cooling of a workpiece in industrial production deviates from the ideal cooling characteristics of a quenching liquid obtained in a laboratory.

Abstract: Disclosed is a supercritical-state cleaning system, comprising a cleaning chamber, a gas booster apparatus, a first heating apparatus, and a carbon dioxide supply apparatus. The cleaning chamber is separately connected to the first heating apparatus and the carbon dioxide supply apparatus. A vacuum pump set is connected to the cleaning chamber. Compared with the prior art, in the Invention, air introduced when a workpiece enters a cleaning chamber is completely removed, so as to prevent mixing of CO2 and air, thereby improving a cleaning effect.

Abstract: A floating heat sink includes an elastic support and a heat dissipating piece. The elastic support is integrally formed and includes at least two fasteners and at least two elastic arms. The fasteners are configured to mount the heat dissipating piece. All the fasteners and all the elastic arms are arranged around the heat dissipating piece. Two ends of the elastic arm are both connected to the fastener, and the two ends of the elastic arm are arranged in a circumferential direction of the heat dissipating piece. A middle part of the elastic arm is configured to be connected to a board in a fastened manner, and the middle part of the elastic arm is bent toward the board.

Abstract: The Invention relates to an atmospheric-pressure acetylene carburizing furnace, comprises a reaction chamber, an acetylene intake duct, an exhaust gas duct, a control and metering apparatus, an exhaust gas measurement apparatus, and a computer controller. The computer controller calculates a total amount of carbon in the furnace and an enrichment rate of a workpiece, and adjusts an acetylene intake volume according to the calculation result until process requirements are met. The Invention realizes carburizing with acetylene under atmospheric pressure and reduces the usage costs while improving the equipment efficiency.

Abstract: Disclosed are a high-pressure liquid-state or supercritical-state quenching apparatus, comprising a working chamber, a heating device, a cooling device, a vacuum pump set, a storage tank, a buffer tank, a gas booster, a first pressure gauge, and a temperature controller. According to the Invention, vacuum liquid-state or supercritical-state quenching is implemented, which satisfies a quenching requirement of a large workpiece, and can also achieve an effect of high-pressure gas quenching. In addition, clean heat treatment is implemented, which avoids waste gas and waste water pollution, and is energy-saving and environmentally-friendly heat treatment.

Abstract: The invention discloses an on-line intelligent control method for the cooling characteristics of a quenching liquid in heat treatment production, which comprises the steps of: step 1: subjecting a workpiece to thermal insulation; step 2: measuring the cooling characteristics and the heat transfer coefficient of a quenching liquid followed by correction; step 3: starting cooling; step 4: then changing the internal circulation rate; and step 5: removing the workpiece. This scheme can effectively avoid the problem that the cooling of a workpiece in industrial production deviates from the ideal cooling characteristics of a quenching liquid obtained in a laboratory.

Abstract: Disclosed is a supercritical-state cleaning system, comprising a cleaning chamber (4), a gas booster apparatus (11), a first heating apparatus (5), and a carbon dioxide supply apparatus. The cleaning chamber (4) is separately connected to the first heating apparatus (5) and the carbon dioxide supply apparatus. A vacuum pump set (1) is connected to the cleaning chamber (4). Compared with the prior art, in the Invention, air introduced when a workpiece enters a cleaning chamber is completely removed, so as to prevent mixing of CO2 and air, thereby improving a cleaning effect.

Abstract: A camera pan-tilt-zoom control and a camera system are disclosed. The camera pan-tilt-zoom control includes a pan-tilt-zoom bracket, a first drive system, a camera mounting bracket, and a first motor. The first drive system includes a first gear and a second gear engaged with each other. The first motor is connected to the first gear, and is configured to drive the first gear to rotate. The camera mounting bracket is connected to the second gear, and is securely connected to the pan-tilt-zoom bracket by using a bearing. The camera mounting bracket is configured to support a camera. A first gear shaft of the first gear, a second gear shaft of the second gear, and an axle center of the bearing are parallel to each other.

Abstract: Disclosed is a supercritical-state cleaning system, comprising a cleaning chamber, a gas booster apparatus, a first heating apparatus, and a carbon dioxide supply apparatus. The cleaning chamber is separately connected to the first heating apparatus and the carbon dioxide supply apparatus. A vacuum pump set is connected to the cleaning chamber. Compared with the prior art, in the Invention, air introduced when a workpiece enters a cleaning chamber is completely removed, so as to prevent mixing of CO2 and air, thereby improving a cleaning effect.

Abstract: The Invention relates to an atmospheric-pressure acetylene carburizing furnace, comprises a reaction chamber, an acetylene intake duct, an exhaust gas duct, a control and metering apparatus, an exhaust gas measurement apparatus, and a computer controller. The computer controller calculates a total amount of carbon in the furnace and an enrichment rate of a workpiece, and adjusts an acetylene intake volume according to the calculation result until process requirements are met. The Invention realizes carburizing with acetylene under atmospheric pressure and reduces the usage costs while improving the equipment efficiency.

Abstract: A tandem solar cell includes a bottom solar cell having an energy bandgap with Eg1 and at least a top solar cell having an energy bandgap Eg2, the energy bandgaps satisfying a relationship Eg1<Eg2. The bottom and top solar cells are vertically stacked and electrically interconnected in series in which an area of the bottom solar cell is larger than an area of the top solar cell in an appropriate ratio to provide for a substantially current matched photovoltaic device for operation in a 2-terminal configuration. This tandem structure may contain more than two (2) cells and each cell may be composed of more than one solar cell. In this case the top solar cell has the largest bandgap, the bottom solar cell has the smallest bandgap, and intervening solar cells have intermediate bandgaps that descend in magnitude from the top to the bottom solar cell.

Abstract: Disclosed are a high-pressure liquid-state or supercritical-state quenching apparatus, comprising a working chamber, a heating device, a cooling device, a vacuum pump set, a storage tank, a buffer tank, a gas booster, a first pressure gauge, and a temperature controller. According to the Invention, vacuum liquid-state or supercritical-state quenching is implemented, which satisfies a quenching requirement of a large workpiece, and can also achieve an effect of high-pressure gas quenching. In addition, clean heat treatment is implemented, which avoids waste gas and waste water pollution, and is energy-saving and environmentally-friendly heat treatment.

Abstract: Disclosed is a supercritical-state cleaning system, comprising a cleaning chamber (4), a gas booster apparatus (11), a first heating apparatus (5), and a carbon dioxide supply apparatus. The cleaning chamber (4) is separately connected to the first heating apparatus (5) and the carbon dioxide supply apparatus. A vacuum pump set (1) is connected to the cleaning chamber (4). Compared with the prior art, in the Invention, air introduced when a workpiece enters a cleaning chamber is completely removed, so as to prevent mixing of CO2 and air, thereby improving a cleaning effect.

Abstract: Photovoltaic semiconductor structures, photovoltaic base structures for forming tandem photovoltaic cells, and methods of fabrication thereof, are provided, in which at least one tunnel junction layer is integrally formed within a semiconductor substrate via a shallow diffusion doping process. In some embodiments, two tunnel junction layers are formed within a common semiconductor substrate having a photovoltaic homojunction therein, such as silicon or germanium, via a two-step shallow diffusion doping process. In other embodiments, a first tunnel junction layer is formed within a semiconductor substrate having a photovoltaic homojunction via a shallow diffusion doping process, while a second tunnel junction layer is formed by an epitaxial or other additive process. In other embodiments, photovoltaic semiconductor structures are provided having an emitter layer and a first tunnel junction layer formed as a composite layer having a graded profile within a semiconductor substrate.

Abstract: A tandem solar cell includes a bottom solar cell having an energy bandgap with Eg1 and at least a top solar cell having an energy bandgap Eg2, the energy bandgaps satisfying a relationship Eg1<Eg2. The bottom and top solar cells are vertically stacked and electrically interconnected in series in which an area of the bottom solar cell is larger than an area of the top solar cell in an appropriate ratio to provide for a substantially current matched photovoltaic device for operation in a 2-terminal configuration. This tandem structure may contain more than two (2) cells and each cell may be composed of more than one solar cell. In this case the top solar cell has the largest bandgap, the bottom solar cell has the smallest bandgap, and intervening solar cells have intermediate bandgaps that descend in magnitude from the top to the bottom solar cell.

Abstract: The invention provides a method of testing reliability of a semiconductor device, wherein the semiconductor device has negative bias temperature instability NBTI.