Abstract:
The present invention relates to a wireless network routing and, more specifically, to a wireless network routing system and a method to perform adaptive routing to a communication environment based on an open shortest path first (OSPF) cost function which applies effective bandwidth in consideration to the bit error rate (BER) which instantaneously varies with time in a wireless communication network. According to the present invention, the communication performance can be improved by performing adaptive routing which is adaptive to the variation of the wireless link which varies dynamically in a communication network having a dynamic link such as a wireless communication network and performing routing with an optimized communication path.
Abstract:
PURPOSE: A heat control module is able to operate properly in a high temperature environment without a separate coolant. CONSTITUTION: A substrate (110) includes at least one electrical element. A first sealing unit (120) surrounds the substrate and includes a phase shift unit (223) which shifts the phase according to the heat generation of the element. The phase shift unit contains at least one among an n-Paraffin group, pentaerythritol, polyethylen, acet amide, naphthalene, and stearic acid. A second sealing unit (130) surrounds part of the first sealing part and prevents the heat from being delivered from the outside to the substrate.
Abstract:
본 발명은 외부환경의 영향이 적은 냉각장치, 이를 구비하는 비행체 및 냉각방법에 관한 것으로, 상기 냉각장치는, 유체가 유입되어 냉매와 열교환하도록 이루어지는 열교환기와, 상기 열교환기에서 유출되는 유체를 압축시키도록 상기 열교환기와 연결되는 압축기와 상기 압축기에서 압축된 유체를 팽창시켜 상기 압축된 유체의 온도를 낮추도록 상기 압축기와 연결되는 터빈을 구비하며 유입되는 유량에 따라 성능이 변하는 냉각기계와, 상기 터빈과 연결되고 상변화 물질(Phase Change Material)이 저장되며 배출되는 유체의 온도를 제어하도록 상기 상변화 물질과 상기 터빈에서 유출된 유체를 열교환시키도록 형성되는 상변화 열교환기, 및 상기 상변화 열교환기로 유입되는 유체의 온도를 조절하도록 상기 터빈의 출구에 배치되어 상기 터빈에서 유출되 는 유량을 제어하는 조절밸브를 포함하는 냉각 장치를 포함한다. 이를 통하여, 급격한 운용환경변화에도 불구하고 외부 환경에 대한 영향이 최소화되는 냉각장치가 구현된다.
Abstract:
PURPOSE: A device for maintaining the internal pressure of a liquid storage tank and a tank containing the device are provided to constantly maintain the internal pressure of a tank, irrelevantly to the temperature change around the tank. CONSTITUTION: The device for maintaining the internal pressure of a liquid storage tank includes; a rubber bladder(1) of a vessel shape; and a coupling flange(2), arranged on the edge of the rubber bladder(1); wherein a housing(3) for covering the edge of the rubber bladder(1) is additionally installed.