摘要:
The present invention provides a method of manufacturing an aromatic polyamide composite membrane comprising: coating an aqueous solution containing polyfunctional aromatic amine to a porous polymer substrate; and reacting the coated substrate with an organic solution containing polyfunctional aromatic acyl halide to lead to interfacial condensation polymerization between the polyfunctional aromatic amine and the polyfunctional aromatic acyl halide so that the reaction product resulting from the interfacial condensation polymerization is coated on the surface of the substrate, characterized in that either of the aqueous solution containing polyfunctional aromatic amine or the organic solution containing polyfunctional aromatic acyl halide has dendritic polymer as one of polyfunctional compounds added thereto. The resulting aromatic polyamide composite membrane which includes dendrimer as polyfunctional compound, exhibits high salt rejection rate and water flux.
摘要:
A non-volatile memory device includes a set pulse generator configured to generate a set pulse, a reset pulse generator configured to generate a reset pulse based on the set pulse, and a write driver block configured to write second data to a second non-volatile memory cell using the reset pulse, while writing first data to a first non-volatile memory cell using the set pulse.
摘要:
A semiconductor device according to example embodiments may be configured so that, when a read command for performing a read operation is input while a write operation is performed, and when a memory bank accessed by a write address during the write operation is the same as a memory bank accessed by a read address during the read operation, the semiconductor device may suspend the write operation automatically or in response to an internal signal until the read operation is finished and performs the write operation after the read operation is finished.
摘要:
In one embodiment, the semiconductor device includes a non-volatile memory cell array, a write buffer configured to store data being written into the non-volatile memory cell array, and a write address buffer configured to store a write address associated with each data stored in the write buffer. An output circuit is configured to selectively output one of data read from the non-volatile memory array and data from the write buffer. A by-pass control circuit is configured to control the output circuit based on whether an input read address matches a valid write address stored in the write address buffer. An invalidation unit is configured to invalidate an address stored in the write address buffer if the stored write address matches an input write address.
摘要:
Disclosed are a nanofiltration composite hollow fiber membrane and a method of manufacturing the same. The nanofiltration composite hollow fiber membrane includes a reinforcement (1) which is a tubular braid, a polymeric resin thin film (2) coated on the outer surface of the reinforcement (1), and a polyamide active layer (3) formed on the outer surface of the polymeric resin thin film. The present invention has an advantage of an excellent strength and an increase in membrane area relative to an installation area.
摘要:
A semiconductor memory device effectively capable of removing skew between data output of a data output circuit and an echo clock of an echo clock generator is provided. The semiconductor memory device comprises a delay circuit comprising a plurality of delay paths for delaying the data enable clock by different time, a test controller for generating a mode select signal and a delay path test signal in response to a test code signal, and a delay signal selection circuit comprising a plurality of fuses for producing a default delay path select signal based on a programmed state of the plurality of fuses, and a multiplexer, responsive to the mode select signal, for selectively providing the default delay path select signal or the delay path test signal to the delay circuit.
摘要:
The present invention relates to a preparation method of a tungsten carbide sintered body for a friction stir welding tool used in a friction stir welding tool of a high melting point material such as steel, titanium and the like or a dissimilar material such as aluminum, magnesium-steel, titanium and the like using pulsed current activation through a discharge plasma sintering apparatus. The preparation method comprises the following steps: filling a tungsten carbide (WC) powder in a mold made of a graphite material; mounting the mold filled with tungsten carbide powder in a chamber of a discharge plasma sintering apparatus; making a vacuum inside of the chamber; molding the tungsten carbide powder while maintaining a constant pressure inside the mold and increasing the temperature according to a set heat increase pattern until the temperature reaches a final target temperature; and cooling the inside of the chamber while maintaining the pressure pressurized in the mold after the molding step. According to the preparation method of a tungsten carbide sintered body for a friction stir welding tool, it is possible to obtain a high relative density of 99.5% or higher, and to prepare a uniform sintered body having a homogeneous tissue with little particle growth, high toughness, high abrasion resistance and high strength within a short time by a single process when preparing a tungsten carbide sintered body appropriate for a friction stir welding tool by using pulsed current activation through a discharge plasma sintering apparatus. In addition, since a sintered body is prepared with only a tungsten carbide single material, excluding a sintering additive such as cobalt, a preparation method is simplified, preparation costs are reduced, and toughness, abrasion resistance and strength are superior compared with a sintered body containing cobalt, a sintering additive.
摘要:
At least one embodiment includes a non-volatile memory cell array, a write buffer configured to store data being written into the non-volatile memory cell array, and a write unit configured to write data into the non-volatile memory cell array. The write unit is configured to perform writing of data such that each data will have reached a stable storage state in the non-volatile memory prior to being over-written in the write buffer.
摘要:
In one embodiment, the semiconductor device, includes a non-volatile memory cell array, and a control unit configured to generate a mode signal indicating if a flash mode has been enabled. A write circuit is configured to write in the non-volatile memory cell array based on the mode signal such that the write circuit disables erasing the non-volatile memory cell array if the flash mode has not been enabled and instructions to erase one or more cells of the non-volatile memory cell array is received.
摘要:
In one embodiment, the semiconductor device includes a non-volatile memory cell array. Memory cells of the non-volatile memory cell array are resistance based, and each memory cell has a resistance that changes over time after data is written into the memory cell. A write address buffer is configured to store write addresses associated with data being written into the non-volatile memory cell array, and a read unit is configured to perform a read operation to read data from the non-volatile memory cell array. The read unit is configured to control a read current applied to the non-volatile memory cell array during the read operation based on whether a read address matches one of the stored write addresses and at least one indication of settling time of the data being written into the non-volatile memory cell array.