摘要:
A traveling system for heavy construction equipment is disclosed, which can prevent a flow rate of a hydraulic fluid to be supplied to a traveling spool from being suddenly decreased when a traveling device and a working device are simultaneously operated, and thus can minimize operation shock due to sudden reduction in traveling speed. The traveling system includes a sensing device that detects manipulation of an operation lever of the working device or manipulation of a traveling pedal installed in the operation lever or the traveling pedal and outputs an electric signal to a controller in a specific operation mode. The traveling system also includes first and second variable displacement hydraulic pumps that are driven by an engine and have the same maximum capacity and a main control valve that controls the flow direction of a hydraulic fluid discharged from the hydraulic pumps.
摘要:
A nonvolatile ferroelectric memory device is provided so as to control read/write operations of a nonvolatile memory cell using a channel resistance of the memory cell which is differentiated by polarity states of a ferroelectric material. In the memory device, an insulating layer is formed on a bottom word line, and a floating channel layer comprising a N-type drain region, a P-type channel region and a N-type source region is formed on the insulating layer. Then, a ferroelectric layer is formed on the floating channel layer, and a word line is formed on the ferroelectric layer. As a result, the resistance state induced to the channel region is controlled depending on the polarity of the ferroelectric layer, thereby regulating the read/write operations of the memory cell array.
摘要:
A refrigerator for storing a beverage at an optimal temperature to stably supercool the beverage and maintain the beverage in a supercooled state, and that can rapidly produce a supercooled beverage while maintaining the supercooled state of the beverage. A supercooling apparatus of the refrigerator includes a storage to which chilled air is supplied from a chilled air supply unit, a supercooling compartment positioned in the storage and refrigerated by the chilled air to indirectly refrigerate an object therein, a hole formed at one side of the supercooling compartment to allow flow of the chilled air into and from the supercooling compartment, and a damper to open or close the hole. The object is directly or indirectly refrigerated in the supercooling compartment according to user's selection by opening or closing the damper.
摘要:
The present invention provides long-fiber reinforced polypropylene compositions comprising: (a) about 29-77 wt % of a crystalline polypropylene resin comprising about 50-100 wt % of a propylene homopolymer; (b) about 20-50 wt % of a long-fiber reinforcing material having an average fiber length of about 3-50 mm and an average diameter of about 4-30 μm; (c) about 2-20 wt % of an elastomer, a plastomer, or a mixture thereof having a melt index as measured at 190° C. of about 20-150 g/10 min, wherein said elastomer, plastomer, or mixture thereof was polymerized by a metallocene-based catalyst; and (d) about 0.01-3 wt % of a radical initiator, wherein the ratio of the melt index as measured at 230° C. of the crystalline polypropylene resin to the melt index as measured at 190° C. of the elastomer, the plastomer, or the mixture thereof is in the range of about 0.5 to about 10.
摘要:
A method of displaying broadcast information and a video display apparatus using the same are provided so that, in providing broadcast information via an electronic program guide, video information for a corresponding program is made available to a user in a thumbnail format. The method includes steps of receiving a broadcast program stream including electronic program guide (EPG) information; storing, in a storage medium, thumbnail information corresponding to a specific broadcast program of the received broadcast program stream; configuring a broadcast guide using the thumbnail information stored in the storage medium; and displaying the configured broadcast guide in response to a program guide key input.
摘要:
There is disclosed an organic EL display device using pre-charge which can improve display quality by preventing a cross talk generated by a brightness difference within the same picture realization area, and a driving method thereof. An organic EL display device according to an embodiment of the present invention includes a display panel where a plurality of data lines cross a plurality of scan lines and electro luminescence cells are arranged in the crossing parts thereof; a pre-charge driver for supplying a pre-charge current to the data line in accordance with gray levels of data; and a data driver for charging a data current to the data line for a designated period which is set before a scan pulse is supplied to the electro luminescence cell and after the pre-charge current is supplied.
摘要:
Provided are a vertical GaN-based LED and a method of manufacturing the same. The vertical GaN-based LED includes an n-electrode. An AlGaN layer is formed under the n-electrode. An undoped GaN layer is formed under the AlGaN layer to provide a two-dimensional electron gas layer to a junction interface of the AlGaN layer. A GaN-based LED structure includes an n-type GaN layer, an active layer, and a p-type GaN layer that are sequentially formed under the undoped GaN layer. A p-electrode is formed under the GaN-based LED structure. A conductive substrate is formed under the p-electrode.
摘要:
The present invention is to provide a system and a method for index reorganization using a partial index transfer in a spatial data warehouse that minimize costs of search, split and readjustment for the index reorganization by organizing and transferring clusters with partial indexes in conformity with an index structure so that the partial indexes can be inserted directly into the existing index, thus ensuring continuous and stable data processes, the index reorganization method comprising: a first step of clustering data extracted from the source database in conformity with an index structure via the builder; a second step of generating partial indexes and transferring the partial indexes to a cluster generated according to the clustering; a third step of recording the transferred partial indexes in physically consecutive spaces, not allocated, in the spatial data warehouse server; and a fourth step of inserting the recorded partial indexes in an existing index.
摘要:
Disclosed is a cathode active material providing a cell performance that is not adversely affected by overdischarge, and a lithium secondary cell using the same. More particularly, the cathode active material for a lithium secondary cell comprises a lithium-transition metal oxide capable of lithium ion intercalation/deintercalation, wherein the cathode active material further comprises a lithium manganese oxide having a layered structure represented by the following formula 1 as an additive:[formula 1] LiMxMn1-x02 wherein, x is a number satisfying 0.05 x
摘要:
Red phosphorescene compounds and organic electro-luminescence device using the same are disclosed. In an organic electroluminescence device including an anode, a hole injecting layer, a hole transport layer, a light emitting layer, an electron transport layer, an electron injecting layer, and a cathode serially deposited on one another, the organic electroluminescence device may use a compound as a dopant of the light emitting layer.