Abstract: A method for diffusion magnetic resonance imaging may be provided. The method may comprise steps of performing sampling on an object at N diffusion weighted directions to acquire undersampled but complementary k-space data, combining the complementary data from different directions to obtain a full sampled k-space data, performing initial reconstruction based on common information among images at the N diffusion weighted directions, and performing joint iterative regularized reconstruction to k-space data in all diffusion weighted directions based on the initial images to obtain the desired final images. Due to the utilization of common information at the N diffusion weighted directions, the acquisition efficiency may be enhanced and image resolution and SNR of acquired images may be improved accordingly.

Abstract: A light emitting diode includes a source layer, a metallic plasma generating layer, a first optical symmetric layer, a first electrode, and a second electrode. The source layer includes a first semiconductor layer, an active layer, and a second semiconductor layer stacked in series. The first semiconductor layer includes a first surface and a second surface opposite to the first surface. The first electrode covers and contacts the first surface. The second electrode is electrically connected with the second semiconductor layer. The metallic plasma generating layer is disposed on a surface of the source layer away from the first semiconductor layer. The first optical symmetric layer is disposed on a surface of the metallic plasma generating layer away from the first semiconductor layer. A refractive index difference between the source layer and the first optical symmetric layer is less than or equal to 0.3.

Abstract: The present disclosure relates to a method for making the sheet-shaped heat and light source. An array of carbon nanotubes on a substrate is provided. A carbon nanotube film is formed by pressing the array of carbon nanotubes. A first electrode and a second electrode are electrically connected with the carbon nanotube film. Furthermore, a method for heating an object is related.

Abstract: A method of making a LED includes following steps. A substrate is provided, and the substrate includes an epitaxial growth surface. A buffer layer is grown on the epitaxial growth surface. A carbon nanotube layer is placed on the buffer layer. A first semiconductor layer, an active layer, and a second semiconductor layer are grown in that order on the buffer layer. A reflector and a first electrode are deposited on the second semiconductor layer in that order. The substrate and the buffer layer are removed. A second electrode is deposited on the first semiconductor layer.

Abstract: A method for making membrane electrode assembly includes providing a proton exchange membrane and two electrodes. An array of carbon nanotubes is formed on a substrate. The array of carbon nanotubes is pressed by a pressing device to form a carbon nanotube film. A catalyst layer is formed on the carbon nanotube film to obtain an electrode. Two electrodes are disposed on two opposite surfaces of a proton exchange membrane, to obtain the membrane electrode assembly.

Abstract: A method for making a lithium battery cathode composite is provided. A mixed solution including a solvent, an iron salt, and a phosphate is provided. An alkaline solution is added in the mixed solution until the mixed solution has a pH value in a range from about 1.5 to about 5. The mixed solution is stirred to react the iron salt with the phosphate to form a number of iron phosphate precursor particles. The iron phosphate precursor particles are heated. A lithium source solution, a reducing agent, and the iron phosphate precursor particles are mixed to form a lithium iron phosphate precursor slurry. Outer surfaces of the lithium vanadium phosphate particles are coated with the lithium iron phosphate precursor.

Abstract: A method for making a phosphorated polymer is also provided. An organic polymer and phosphorus are mixed to obtain a mixture. A weight ratio of the organic polymer to the phosphorus ranges from about 1:10 to about 4:1. The mixture is dried in an inert atmosphere or vacuum. The mixture is heated in an inert atmosphere or vacuum so that the phosphorus sublimes and reacts with the organic polymer to form a preform. The preform is cooled down to room temperature and immersed in an alkaline solution. The pH of the preform is adjusted to be neutral. The preform is dried.

Abstract: A method for making an emitter is disclosed. A number of carbon nanotubes in parallel with each other are provided. The carbon nanotubes have a number of first ends and a number of second ends opposite to the number of first ends. The first ends are attached on a first electrode and the second ends are attached on a second electrode. The first electrode and the second electrode are spaced from each other. A voltage is supplied between the first electrode and the second electrode to break the carbon nanotubes.

Abstract: A system and a method for measuring an ash content and a calorific value of a coal are provided. The system comprises: an X ray device, disposed over the coal and configured to emit an X ray to the coal; at least one X ray measuring device, disposed over the coal and configured to measure an energy spectrum of an X ray reflected by the coal; a distance sensor, disposed over the coal and configured to measure a distance between the coal and the at least one X ray measuring device; and a computing device, configured to receive the energy spectrum and the distance from the at least one X ray measuring device and the distance sensor and to compute the ash content and the calorific value of the coal according to the energy spectrum and the distance.

Abstract: A method for making a field emission cathode device is provided. A filler, a substrate, and a metal plate are provided. The metal plate has a first surface and a second surface opposite to the first surface, and defines at least one through hole extending through from the first surface to the second surface. At least one electron emitter is inserted into the at least one through hole. The first surface of the metal plate is attached to the substrate. At least a part of the at least one electron emitter is located between the first surface and the substrate. The at least one through hole is filled with the filler to firmly fix the at least one electron emitter.

Abstract: A method for applying carbon nanotube films is provided. The method includes the following steps. At least one pre-laid supporter is placed on a film application device including a rotation axis and a rotator. The rotator is capable of rotating about the rotation axis, and includes a number of support surfaces, wherein the at least one pre-laid supporter is attached on the plurality of support surfaces. A carbon nanotube film is drawn from a carbon nanotube array that is supported by a supplier. One end of the carbon nanotube film away from the carbon nanotube array is adhered to one of the at least one pre-laid supporter. The rotator is rotates about the rotation axis such that the carbon nanotube film is applied on the at least one pre-laid supporter; and cutting the carbon nanotube film with a cutter.

Abstract: A system and a method for measuring an ash content and a calorific value of a coal are provided. The system comprises: at least two dual-energy gamma ray transmission measuring devices and a computing device, in which at least one first dual-energy gamma ray transmission measuring device is disposed before an inlet of a coal combustion apparatus for measuring a first attenuation coefficient of a gamma ray from the at least one first dual-energy gamma ray transmission measuring device with regard to the coal; at least one second dual-energy gamma ray transmission measuring device is disposed after an outlet of the coal combustion apparatus for measuring a second attenuation coefficient of a gamma ray from the at least one second dual-energy gamma ray transmission measuring device with regard to a coal ash; and the computing device is configured to compute the ash content and the calorific value of the coal.

Abstract: A method for making the phosphorated composite e is provided. First, a mixture is obtained by mixing a source material with red phosphorus. The weight ratio of the source material to the red phosphorus ranges from about 1:10 to about 5:1. Second, the mixture is dried in an inert atmosphere or vacuum. Third, the mixture is heated in a reacting room filled with an inert atmosphere so that the red phosphorus sublimes. Finally, the reacting room is cooled down.

Abstract: A phosphorated composite capable of electrochemical reversible lithium storage includes a conductive matrix and red phosphorus. The conductive matrix includes a material being selected from the group consisting of conductive polymer and conductive carbonaceous material. A weight percentage of the conductive matrix in the phosphorated composite ranges from about 10% to about 85%. A weight percentage of the red phosphorus in the phosphorated composite ranges from about 15% to about 90%. An anode using the phosphorated composite is also provided.

Abstract: A method for making an electrostrictive composite is provided. A number of carbon nanotubes, a number of reinforcing particles, and a polymer precursor are provided. The carbon nanotubes, the reinforcing particles, and the polymer precursor are mixed to obtain a mixture. The polymer precursor in the mixture is polymerized and cured.

Abstract: A method and device for acquiring latent fingerprint orientation. The method includes: extracting a valid area in a latent fingerprint image; acquiring an orientation field of the valid area and a confidence of coordinate points in the valid area; dividing the orientation field into a first area with a high confidence and a second area with a low confidence; collecting control points in the first area, performing triangulation on control points in the first area and determining differences between control points to determine a set of control points; manually marking control points in the second area, adding control points marked to the set, performing triangulation on control points in the set and determining whether a new manually marked control point is to be added in the set according to a difference determination; and establishing a model for control points in the set to obtain an orientation field of the image.