58results about How to "High temporal stability" patented technology

This relates to a method for image segmentation and video object tracking. While conventional methods rely on the motion homogeneity of the objects to be tracked, the present method is based on a concept of partition projection in which both spatial and motion information are now exploited, and implemented by means of a modified double partition approach, including a re-segmentation of a first partition followed by a projection step of the obtained fine partition into the current frame. Objects presenting non-homogeneous motion, static objects, and parts of an object with homogeneous motion can thus be tracked.

An electrical coil, particularly a gradient coil for a magnetic resonance apparatus, contains at least one electrical conductor, a carrier structure, at least one component of a cooling device and a heat insulator, which is arranged for at least one section of the conductor between the conductor and the carrier structure.

The invention discloses a cold-heat circulation aging treatment method for increasing magnetic stability of permanent magnets. The method comprises the following steps of: putting one or more permanent magnets magnetized in a saturated manner on a non-magnetic bottom plate; then putting in a high-low temperature chamber, and freezing at minus 70 DEG C to minus 20 DEG C for 30-120 min; then, heating the high-low temperature chamber to 60-250 DEG C at the temperature increasing rate of 1-10 DEG C/min, and keeping the temperature for 30-240 min; and finally, naturally cooling to room temperature, and completing cold-heat circulation aging treatment. By adopting the method disclosed by the invention, total loss, irreversible loss, reversible loss and reversible temperature coefficients when temperature of the permanent magnets is changed can be effectively eliminated or reduced; and heat stability, time stability, magnetic stability and radiation-resistant magnetic stability of the permanent magnets under a vibration condition can be increased.

The present invention relates to the preparation of liposomes with enhanced loading capacity for pharmaceutically and/or diagnostically active agents and/or cosmetic agents which are substantially solubilized by the liposomal membranes, to liposome dispersions with enhanced stability with respect to release of the active agent and/or cosmetic agent from the liposomes obtainable by the process, and to pharmaceutical or cosmetic compositions comprising said stabilized liposome dispersions. The preparation may involve dehydration and rehydration steps of liposome dispersions which may be carried out by spray drying.

A water dispersible colloidal system in the form of generally spherical matrix type particles and of sizes typically in the range of from 50 to 500 nm, called nanoparticles, and a process for the preparation of such systems. The system is characterized in that the nanoparticles comprise at least one amphiphilically modified calixarene. The water dispersion contains at least one active component such as a cosmetic, a pharmaceutical compound or other biologically active substances, foods, beverages, etc. enclosed within the nanoparticles, in the outer aqueous phase, or in both. The systems show outstanding properties, especially long-life stability even at elevated la temperatures.

Disclosed is an ink composition including: (1) a pigment; (2) a polymerization initiator having a content of 2% by mass or more with respect to a total amount of the composition and having a solubility with respect to pure water at 25° C. of 5 to 8 g/l; (3) a compound A that is at least one selected from the group consisting of dimethylacrylamide, diethylacrylamide, N-isopropylacrylamide, dimethylacetamide, N-ethylpyrrolidone, 1-cyclohexyl-2-pyrrolidone, 1-(2-hydroxyethyl)-2-pyrrolidone, 1,3-dimethyl-2-imidazolidinone, tetramethylurea and gamma-valerolactone; (4) a polymerizable compound having two or more ethylenically unsaturated double bonds; and (5) water having a content of 50% by mass or more with respect to the total amount of the composition.

A two-liquid composition, includes (A) a first liquid composition that contains a hydrophilic polymer having a hydrolyzable silyl group; and (B) a second liquid composition that contains a catalyst capable of accelerating reaction of the hydrolyzable silyl group, and a hydrophilic member is formed by mixing the first liquid composition (A) and the second liquid composition (B), coating a substrate with the resultant mixture and drying the mixture coated.

A sulfonate group-containing copolymer is provided which comprising a structural unit (a) derived from a sulfonate group-containing monomer (A); a structural unit (b) derived from a (poly)oxyalkylene monomer (B); a structural unit (c) derived from a carboxyl group-containing monomer (C). The sulfonate group-containing copolymer comprises from 20% to 90% by mass in an acid form equivalent of the structural unit (c) in 100% by mass of all the structural units constituting the sulfonate group-containing copolymer. The product (P×Mw×n) of the ratio by mass P of the structural unit (b) to the structural unit (a) multiplied by the weight average molecular weight Mw of the sulfonate group-containing copolymer multiplied by the value n is from 950,000 to 800,000,000.

A cellulose acetate film is produced from a solution of a cellulose acylate in a mixed solvent. The mixed solvent comprises a main solvent and an alcohol. The mixed solvent essentially does not contain chlorine atom. The main solvent comprises an ester and a ketone. The ester has a solubility parameter of 16 to 23. The ketone has a solubility parameter of 16 to 23. The alcohol has a solubility parameter of 20 to 30. The mixed solvent comprises the ester in an amount of 58 to 96 wt. %, the ketone in an amount of 2 to 15 wt. %, and the alcohol in an amount of 2 to 40 wt. %.

A method for preparing an alignment layer surface provides a surface on the alignment layer. The surface is bombarded with ions, and reactive gas is introduced to the ion beam to saturate dangling bonds on the surface. Another method for preparing an alignment layer surface provides a surface on the alignment layer. The surface is bombarded with ions and quenched with a reactive component to saturate dangling bonds on the surface.

A stabilized food composition with a reduced dry matter content, wherein the stabilizing agent is a fructane or fructane mixture in an amount of 1-15 wt % and to 1-25% of the water content of said food composition.

The invention discloses a continuous terahertz wave self-reference digital holographic imaging method based on a Fresnel double-sided mirror. According to the method, high-time-stability common-optical-path off-axis interference holography can be achieved only through few optical elements. The method has the advantages that the number of required optical elements is small, the optical path structure is compact, the period of interference fringes can be flexibly adjusted, and the sampling condition of the detector can be better met. Because the intensities of the object light and the referencelight on are cording plane are almost equal, interference fringes with consistent contrast can be obtained, and the reproduction of an amplitude image and a phase image and the improvement of the precision are facilitated. Under the conditions of the same recording duration and unchanged experimental conditions, experiments prove that the recording device provided by the invention has higher timestability than the traditional optical path system based on a Mach-Zehnder interferometer structure.

The present invention provides a lambda-shaped carbazole based chromophore, and a main-chain NLO polyurethane containing the same. The lambda-shaped structure reduces the plasticization to the main-chain polymers caused by the chromophore and increases temporal stability of the NLO coefficients of the main-chain NLO polyurethane. The NLO coefficients of the main-chain NLO polyurethane are stable because the efficiency of dipole alignment in electric field is increased due to the dipole thereof being perpendicular to the main chain of the polyurethane.

The invention discloses a high-efficiency perovskite solar cell and a preparation method thereof. The perovskite solar cell comprises a light transmission/transparent electrode layer, a transition layer, an electron transport layer, a light absorption layer, an electron absorption layer, a hole transport layer, and a top electrode which are successively stacked. The transition layer is an oxide of nickel. The electron transport layer is a quaternary oxide. The light absorption layer is a material provided with perovskite structure. The electron absorption layer is formed by fullerene derivative. The hole transport layer is formed by a ternary oxide. The top electrode is formed by a material with good conductivity. The high-efficiency perovskite solar cell effectively utilizes the performance of the perovskite material, is increased in the photoelectric converting efficiency by over 20 percent, and is suitable for batch production.

A method for optical microscopy, including using a first laser beam to excite dye particles in a sample region with light having a first wavelength. A second laser beam with a second wavelength based on the emission spectrum of the excited particles is used to de-excite the excited particles. The first and second beams have first and second respective intensity distributions which are spatially different when co-aligned; the second profile has a minimum where the first has a maximum. The region is once concurrently illuminated with the first and second beams, and an emission signal is detected. For each scanning point, the region is illuminated also with a pulse of the second laser beam or continuously prior to or after illuminating the region of the sample concurrently with both lasers. The illumination with only the second laser beam defines a background signal that is subtracted from the emission signal.

The invention provides a mixed period permanent magnet focusing system of a single-row multi-electron beam terahertz radiation source. The system is designed by combining a transverse magnetization period permanent magnet system and a longitudinal magnetization period permanent magnet system and comprises two groups of period permanent magnet assemblies and a group of period pole shoe assemblies. The cone permanent magnets distributed on the two sides of the wide edge of the electron channel form a transverse magnetization period permanent magnet system, the rectangular annular permanent magnets surrounding the electron channel form a longitudinal magnetization period permanent magnet system, and the transverse magnetization period permanent magnet system and the longitudinal magnetization period permanent magnet system are mainly used for bunching electron beams in the x direction and the y direction respectively. By combining the two focusing systems, bunching of electrons can be realized in x and y directions so that stable transmission of single-row multi-electron beams is realized, and the problem of unstable transmission of electron beams caused by electron beam divergence when the single-row multi-electron beams are transmitted in an anode electron channel is solved; and the beam-wave interaction efficiency and the performance of the whole device are improved.