摘要:
A synthesis of an energetic prepolymer used as a high-energy binder for an insensitive and high performance explosive is disclosed. More specifically, provided are a novel compound 2-nitratoethyl oxirane expressed by formula III, a novel compound poly(2-nitratoethyl oxirane) expressed by formula IV, obtained by polymerization of 2-nitratoethyl oxirane used as a monomer and a preparation method thereof. The compound, used as an energetic prepolymer and a monomer for preparation thereof can substitute for existing poly(glycidyl nitrate) (PGN) which has been known to be a promising one having the best performance among existing energetic prepolymers, but which has a problem to be self-decomposed after synthesis of polyurethane elastomer, to solve this problem.
摘要:
Disclosed are novel compounds that can be used as an energetic binder used for improving the performance and the properties of a high explosive, and a preparation method thereof. More specifically, provided are glycidyl dinitropropyl formal of chemical formula IV having a nitro group (—NO2) as an energy group and having no hydrogen bonding to carbon to which the nitro group is binding, poly(glycidyl dinitropropyl formal) of chemical formula V polymerized using the glycidyl dinitropropyl formal as a monomer, and a preparation method thereof.
摘要:
Disclosed are novel compounds that can be used as an energetic binder used for improving the performance and the properties of a high explosive, and a preparation method thereof. More specifically, provided are glycidyl dinitropropyl formal of chemical formula IV having a nitro group (—NO2) as an energy group and having no hydrogen bonding to carbon to which the nitro group is binding, poly(glycidyl dinitropropyl formal) of chemical formula V polymerized using the glycidyl dinitropropyl formal as a monomer, and a preparation method thereof.
摘要:
An apparatus and method for supporting prototype development of an embedded system are provided. The apparatus includes: a requirements analysis unit analyzing information about requirements and use cases of the embedded system which are input by a user to create a use case analysis table; an architecture design unit analyzing at least one of software and hardware structures of the embedded system which are input by the user and constituents of each of the software and hardware structures to create a structure graph for system, and reflecting the created structure graph for system in the use case analysis table created by the requirements analysis unit to update the use case analysis table; an architecture behavior definition unit defining behavior information including an execution flow and call relationship between the constituents defined by the architecture design unit; an integrated implementation unit creating a code so that the constituents defined by the architecture design unit operate according to the behavior information defined by the architecture behavior definition unit, and implementing the system while checking whether or not a function of each constituent is executed; and a test unit testing function and performance of the implemented system. Thereby, the system development based on the design mixing the hardware and software can divide changes and corrections that can take place during the development process at a high level of a development initial step, so that the system can be constructed from the ground up.
摘要:
The present invention relates to a method and apparatus for analyzing functionality and test paths of product line using a priority graph. The apparatus includes: a parser for analyzing a use case scenario expressed in a text format, in a unit of word to separate a word from the analyzed use case scenario; an object/behavior identifier for extracting core noun and verb from the separated word; a dependency graph modeler for supporting to model an execution flow of a function; a priority graph editor for supporting to analyze and express linked feature objects, a feature category, a default value, a reference value, a use case name, variation points; a test path identifier for identifying a test path to examine requirements and plan a test at an information expression of a priority graph; and a graphic information processor for visually changing and showing an analysis information of the dependency graph and the priority graph.
摘要:
Methods are provided for fabricating FinFETs that avoid thickness uniformity problems across a die or a substrate. One method includes providing a semiconductor substrate divided into a plurality of chips, each chip bounded by scribe lines. The substrate is etched to form a plurality of fins, each of the fins extending uniformly across the width of the chips. An oxide is deposited to fill between the fins and is etched to recess the top of the oxide below the top of the fins. An isolation hard mask is deposited and patterned overlying the plurality of fins and is used as an etch mask to etch trenches in the substrate defining a plurality of active areas, each of the plurality of active areas including at least a portion of at least one of the fins. The trenches are filled with an insulating material to isolate between adjacent active areas.
摘要:
An error correction module is disclosed whereby two bit cells are used to store a bit of information in a redundant manner so that a redundant error correction module can correct a sporadic data error at one of the two bits.
摘要:
The methods and compositions disclosed herein describes a solution containing at least one block co-polymer that is a liquid at lower temperatures and transitions to a gel at higher temperatures. The compositions are useful, for example, as an alternative to saline or silicone-gel as fillers for prostheses.
摘要:
Disclosed are a server system for performing communication over a wireless network and a communication method thereof. The server system comprises at least one client device and a server device for performing a state monitoring operation or a control operation for the client device over the wireless network. When a data packet is sent, the server device begins to send a following packet by variably applying a transmission rate according to a network transmission state when a leading packet has been completely transmitted. Because a transmission rate can be set appropriately to the network state, the number of unnecessary retransmissions can be reduced. Therefore, transmission delay can be avoided and stable and rapid wireless communication can be achieved.
摘要:
The present invention relates to a polymer supported reagent comprising a novel crosslinked mesoporous polymer, enabling a simple and easy production of an azoxy compound or an azo compound from an aromatic nitro compound, and a method of selectively reducing an aromatic nitro compound by using the same. The polymer supported reagent comprises a certain acrylamide mesoporous crosslinked polymer.