Abstract: This application discloses an antireflection coating, a cover structure, and a method for manufacturing an antireflection coating. The antireflection coating includes one or more antireflection units. The plurality of antireflection units are sequentially stacked in a first direction, and the first direction is a light-emitting direction of the antireflection coating. The one or more antireflection units include a first antireflection unit. The first antireflection unit includes a first thin film layer and a second thin film layer. The second thin film layer and the first thin film layer are sequentially stacked in the first direction, and a surface that is of the first thin film layer and that is away from the second thin film layer is a light-emitting surface of the antireflection coating.

Abstract: The present application discloses a multi-channel topological insulator structure, including an insulating substrate, multiple topological insulator quantum well films, and multiple insulating interlayers. The topological insulator quantum well films and the insulating interlayers are alternately stacked on a surface of the insulating substrate. Two adjacent topological insulator quantum well films are separated by one insulating interlayer. The present application also discloses a method for making the multi-channel topological insulator structure and an electrical device.

Abstract: The present application discloses a topological insulator structure including an insulating substrate, a topological insulator quantum well film, and an insulating protective layer. The topological insulator quantum well film and the insulating protective layer are orderly stacked on a surface of the insulating substrate, forming a heterojunction structure. The insulating protective layer is selected from the group consisting of the wurtzite-structured CdSe, the sphalerite-structured ZnTe, the sphalerite-structured CdSe, the sphalerite-structured CdTe, the sphalerite-structured HgSe, the sphalerite-structured HgTe, and combinations thereof. The present application also discloses a method for making the topological insulator structure.

Abstract: The present application discloses a double-channel topological insulator structure includes an insulating substrate, a first topological insulator quantum well film, an insulating interlayer, and a second topological insulator quantum well film. The first topological insulator quantum well film, the insulating interlayer, and the second topological insulator quantum well film are orderly stacked on a surface of the insulating substrate. The first and second topological insulator quantum well films are separated by the insulating interlayer. The present application also discloses a method for making the double-channel topological insulator structure and a method for generating quantum spin Hall effect.

Abstract: A transport vehicle includes a driving unit, a wheel and a charging system. The charging system includes an electricity-generating tire and a converting unit. The electricity-generating tire has a tire body mounted on the wheel, and a piezoelectricity generating unit disposed at the tire body and configured to output electricity when the piezoelectricity generating unit is subjected to mechanical forces attributed to movement of the tire body on a ground surface. The converting unit operates to convert the electricity outputted by the piezoelectricity generating unit into a form of energy for storage in an energy storing unit.

Abstract: The present invention discloses a micro-channel heat exchanger comprising manifolds, a plurality of micro-channel flat tubes connected to the manifolds, and a plurality of rows of fins spaced apart by the micro-channel flat tubes. The micro-channel heat exchanger is provided with at least one bend designed to avoid the deformation of the fins on two inner sides adjacent to the bend due to crushing and meanwhile maintaining the ventilation and heat exchange functionalities of the bend. For example, the bend may include at least one row of fins where the width of the fins are less than the width of the fins on two sides adjacent to the bend. Alternatively, the gap between the fins in the bend can be greater than the gap between the fins on two sides adjacent to the bend. Still alternatively, the bend can be formed with a space for separating cores of the heat exchanger.

Abstract: A transport vehicle includes a driving unit, a wheel and a charging system. The charging system includes an electricity-generating tire and a converting unit. The electricity-generating tire has a tire body mounted on the wheel, and a piezoelectricity generating unit disposed at the tire body and configured to output electricity when the piezoelectricity generating unit is subjected to mechanical forces attributed to movement of the tire body on a ground surface. The converting unit operates to convert the electricity outputted by the piezoelectricity generating unit into a form of energy for storage in an energy storing unit.

Abstract: An LED constant-current drive circuit includes a BUCK circuit consisting of a transformer T1, a diode D9, a capacitor C5 and a field effect transistor Q1; a voltage limiting circuit consisting of a resistor R1, a diode D8, a capacitor C1, a resistor R3, a triode Q2, a zener diode DZ1 and a diode D10; and a current limiting circuit consisting of a resistor R4, a triode Q3, a triode Q4 and a resistor R2. When the transistor Q1 is turned on, a current flows through a primary side of the transformer T1 and an LED load, and then flows through the transistor Q1 and the resistor R2, and then flows back to a negative electrode of a power supply. When the transistor Q1 is turned off, the current flows through the primary side of the transformer T1, the LED load and the diode D9, thus forming a loop.

Abstract: The present invention discloses a fin of heat exchanger comprising a straight segment; a substantially-circular arc segment having a radius of R; and a substantially-circular arc transition segment connected between the straight segment and the substantially-circular arc segment and having a radius of r, wherein R>r. According to the present invention, after being assembled and welded to the heat exchanger, the substantially-circular arc segment is relatively easy to deform, and the shapes of the straight segment and substantially-circular arc transition segment are substantially unchanged. Therefore, the deformation of the fin is regular and easy to control. The arranging density of the fin in the heat exchanger is uniform, and the shape of the fin can meet the design requirements. In addition, the shape stability and the heat transfer coefficient of the fin are high.

Abstract: The present invention discloses a micro-channel heat exchanger comprising manifolds, a plurality of micro-channel flat tubes connected to the manifolds, and a plurality of rows of fins spaced apart by the micro-channel flat tubes. The micro-channel heat exchanger is provided with at least one bend designed to avoid the deformation of the fins on two inner sides adjacent to the bend due to crushing and meanwhile maintaining the ventilation and heat exchange functionalities of the bend. For example, the bend may include at least one row of fins where the width of the fins are less than the width of the fins on two sides adjacent to the bend. Alternatively, the gap between the fins in the bend can be greater than the gap between the fins on two sides adjacent to the bend. Still alternatively, the bend can be formed with a space for separating cores of the heat exchanger.

Abstract: The present invention discloses a fin of heat exchanger comprising a straight segment; a substantially-circular arc segment having a radius of R; and a substantially-circular arc transition segment connected between the straight segment and the substantially-circular arc segment and having a radius of r, wherein R>r. According to the present invention, after being assembled and welded to the heat exchanger, the substantially-circular arc segment is relatively easy to deform, and the shapes of the straight segment and substantially-circular arc transition segment are substantially unchanged. Therefore, the deformation of the fin is regular and easy to control. The arranging density of the fin in the heat exchanger is uniform, and the shape of the fin can meet the design requirements. In addition, the shape stability and the heat transfer coefficient of the fin are high.

Abstract: The present invention discloses a micro-channel heat exchanger comprising manifolds, a plurality of micro-channel flat tubes connected to the manifolds, and a plurality of rows of fins spaced apart by the micro-channel flat tubes. The micro-channel heat exchanger is provided with at least one bend designed to avoid the deformation of the fins on two inner sides adjacent to the bend due to crushing and meanwhile maintaining the ventilation and heat exchange functionalities of the bend. For example, the bend may include at least one row of fins where the width of the fins are less than the width of the fins on two sides adjacent to the bend. Alternatively, the gap between the fins in the bend can be greater than the gap between the fins on two sides adjacent to the bend. Still alternatively, the bend can be formed with a space for separating cores of the heat exchanger.

Abstract: Ultra-oriented, crystalline synthetic filaments with a combination of high tenacity, high dimensional stability, high modulus, and a high fraction of taut-tie molecular phase are produced by extruding a fiber-forming synthetic polymer melt into a liquid isothermal bath, withdrawing the filaments from the bath and then post-treating them at a very low draw ratio. The bath is preferably maintained at a temperature of at least 30.degree. C. above the glass transition temperature of the polymer to enhance the orientation and promote the formation of stable extended chains. Polymer filaments so produced are characterized in that they have ultra-high birefringence, high tenacity and modulus, a high dimensional stability, and a high fraction of taut-tie molecular phase.

Abstract: Ultra-oriented, crystalline synthetic filaments with high tenacity are produced by extrusion of a fiber-forming synthetic polymer melt into a liquid isothermal bath maintained at a temperature of at least 30.degree. C. above the glass transition temperature of the polymer, withdrawing the filaments from the bath and then winding up the filaments. Polymer filaments so produced are characterized in that the ratio of the crystalline orientation factor (f.sub.c) to the amorphous orientation factor (f.sub.a) is 1.2 or less, and are further characterized in that the percent crystallinity is less than 40. The filaments also have a fine crystal size. The crystal size is less than 40 .ANG. in the 100 and 105 planes and less than 30 .ANG. in the 010 plane.

Abstract: Ultra-oriented, crystalline synthetic filaments with high tenacity are produced by extrusion of a fiber-forming synthetic polymer melt into a liquid isothermal bath maintained at a temperature of at least 30.degree. C. above the glass transition temperature of the polymer, withdrawing the filaments from the bath and then winding up the filaments. Polyethylene terephthalate filaments so produced at 3000-5000 m/min exhibit a crystalline structure and possess birefringence of 0.20-0.22, tenacity of 7-9 g/d, break elongation of 14-30% and boil-off shrinkage of 5-10%.

Abstract: Ultra-oriented, crystalline synthetic filaments with high tenacity are produced by extrusion of a fiber-forming synthetic polymer melt into a liquid isothermal bath maintained at a temperature of at least 30.degree. C. above the glass transition temperature of the polymer, withdrawing the filaments from the bath and then winding up the filaments. Polyethylene terephthalate filaments so produced at 3000-5000 m/min exhibit a crystalline structure and possess birefringence of 0.20-0.22, tenacity of 7-9 g/d, break elongation of 14%-30% and boil-off shrinkage of 5%-10%.

Abstract: The high speed melt spinning of synthetic polymer fibers is provided with on-line zone heating and cooling by which the strand emerging from the spinneret is initially cooled to an optimum temperature above the glass transition point of the polymer, the maintained near that temperature for a period of time to promote development of desirable fiber properties such as crystallization and crystal orientation, and then finally cooled below the solidification point for take up.

Abstract: Ultra-oriented, crystalline synthetic filaments with high tenacity are produced by extrusion of a fiber-forming synthetic polymer melt into a liquid isothermal bath maintained at a temperature of at least 30.degree. C. above the glass transition temperature of the polymer, withdrawing the filaments from the bath and then winding up the filaments. Polymer filaments so produced are characterized in that the ratio of the crystalline orientation factor (f.sub.c) to the amorphous orientation factor (f.sub.a) is 1.2 or less, and are further characterized in that the percent crystallinity is less than 40. The filaments also have a fine crystal size. The crystal size is less than 40 .ANG. in the 100 and 105 planes and less than 30 .ANG. in the 010 plane.