摘要:
A piezoelectric/electrostrictive microactuator is made by forming piezoelectric/electrostrictive film using a mixture of the polyvinylidene fluoride, excellent in moldability and a ceramic powder, excellent in piezoelectricity. The powder has basic composition elements of lead titanium with a particle size below 5 &mgr;m, made by a nonexplosive oxidative-reductive combustion reaction at a relatively low temperature of 100-500° C. The piezoelectric/electrostrictive microactuator may be modulated in mechanical strength and linkability between particles by using an improved colloid process which can achieve low energy consumption and low cost, because the low temperature process is simplified by using ceramic powder calcined at low temperatures.
摘要:
A method for producing ceramic oxide powder having a grain size of 5 &mgr;m or less and exhibiting a uniform grain size distribution is disclosed. The method includes the steps of sufficiently dissolving or uniformly dispersing a raw material of constituent ceramic elements in a solvent or dispersion medium, thereby preparing a solution or dispersed mixture containing the constituent ceramic elements, adding citric acid in the solution or dispersed mixture, in which the constituent ceramic elements are dissolved or dispersed, at least in an amount required to generate an oxidative-reductive combustion reaction with anions of the constituent ceramic elements, thereby preparing a mixed solution, and thermally treating the mixed solution at a temperature of 100 to 500° C., thereby evaporating the solvent or dispersed medium while causing the citric acid to act as a reductive combustion aid, thereby generating a non-explosive oxidative-reductive combustion reaction with the anions of the constituent ceramic elements, so that ceramic oxide is produced without any scattering by virtue of heat generated during the combustion reaction. Using the ceramic oxide powder, ceramic paste having a micro grain size and exhibiting a superior reaction property can be produced using a single combustion process at a low temperature.
摘要:
An image processing device includes a gatherer configured to receive image data and gather statistics of color data from the image data. The image processing device includes a processor configured to analyze the statistics of the color data to determine whether the image data includes single color data or multi color data, determine a first gain value to perform an automatic white balance if the image data includes multi color data, and determine a second gain value different from the first gain value using a gain table if the image data includes single color data. The image processing device includes a gain applier configured to apply the first gain value or the second gain value to the color data.
摘要:
Provided is an automated periodic surveillance testing method and apparatus in a digital reactor protection system, which unites a passive testing means such as a self-diagnosis or an on-line state comparison with an active testing means such as an automatic logic test and the like in the digital reactor protection system. Accordingly, a device self-diagnosis, an on-line state diagnosis, and an automatic logic test are used as the automated periodic surveillance testing method in the digital reactor protection system. Thus, the time consumed in a periodic surveillance test can be minimized, thereby saving reactor operating costs, and excessive manpower can be avoided, thereby decreasing potential human errors. Also, a channel detour time at which one of multiple channels is detoured can be minimized based on the automated periodic surveillance test in the digital reactor protection system, thereby enhancing stability.
摘要:
A method and an apparatus for operating a camera function in a portable terminal are provided. State information representing at least one of a direction and a rotation state of the portable terminal is obtained, and at least one of a sequence of reading an image from a camera sensor and an appropriate user interface is determined depending on the state information. Thus, the camera function is performed depending on the determined sequence or user interface.
摘要:
The present invention provides a diaminopyrimidine derivative or its pharmaceutically acceptable salt, a process for the preparation thereof, a pharmaceutical composition comprising the same, and a use thereof. The diaminopyrimidine derivative or its pharmaceutically acceptable salt functions as a 5-HT4 receptor agonist, and therefore can be usefully applied for preventing or treating dysfunction in gastrointestinal motility, one of the gastrointestinal diseases, such as gastroesophageal reflux disease (GERD), constipation, irritable bowel syndrome (IBS), dyspepsia, post-operative ileus, delayed gastric emptying, gastroparesis, intestinal pseudo-obstruction, drug-induced delayed transit, or diabetic gastric atony.
摘要:
A method of stabilizing a three-dimensional (3D) digital video image sequence includes generating a depth map for each stereoscopic pair of images using each of the image frames in a first-perspective (e.g., left) group and each of the image frames in a second-perspective group (e.g., right) and determining the background regions of each of the depth maps, defining the background regions in each of the image frames in one group among the first-perspective and second-perspective groups using the determined background regions, and calculating first global motion vectors between the consecutive image frames in the one group using only pixels of the defined second background regions.
摘要:
Disclosed is a conductive paste composition for low temperature firing, including conductive copper powder composed of flake powder, spherical powder and nano powder, a melamine-based binder, and an organic solvent, thus enabling the formation of a conductive wire having a high aspect ratio with high printability, and inexpensive formation of a metal wire, and exhibiting superior electrical properties and adhesive force even when conducting low temperature firing at 200° C. or less, so that the conductive paste composition can be usefully applied as a conductive material for forming electrodes of a variety of products such as solar cells, touch panels, printed circuit boards (PCBs), radio-frequency identification (RFID), plasma display panels (PDPs) and so on.
摘要:
The invention relates to Sn—Cu—Ag alloy nanoparticles, preparation method thereof and ink or paste using the alloy nanoparticles in which the alloy nanoparticles are suitable for metal ink having excellent electrical conductivity or solder materials having low calcinating temperature.
摘要:
Provided is a copper nano paste that can be calcined at a relatively low temperature. The copper nano paste includes: a binder added in an amount of 0.1 to 30 parts by weight; an additive added in an amount of not more than 10 parts by weight; and copper particles added in an amount of 1 to 95 parts by weight, wherein the copper particles have a particle size of 150 nm or less, and the surfaces of the copper particles are coated with a capping material.