摘要:
The present invention provides a model equation for predicting the impact resistance of an ABS material, which has excellent properties, gloss, and stainability and thus can be widely used in vehicles, electricity and electronics, and miscellaneous applications. The model equation of the present invention provides high accuracy and reproducibility. The prediction technology can be used particularly to determine whether a material complies with the specification of vehicle components, to overcome the quality problems, and to prevent the production of defective products.
摘要:
The present invention relates to a sound absorbing sheet having excellent sound absorbing performance and surface decorative effects. The sound absorbing sheet of the present invention is characterized by comprising a base and having an average sound absorption of 0.4 or higher in a frequency range of 200 to 2000 Hz. The permeability and air porosity of a base layer of the sound absorbing sheet of the present invention may be adjusted, thereby achieving significantly superior effects of sound absorbing performance despite the thinness of the sound absorbing sheet.
摘要:
The present invention relates to a vacuum insulation material using a getter material obtained by mixing zeolite and calcium oxide, and more particularly, to a vacuum insulation material in which zeolite having a large specific surface area to absorb the greater part of remaining water from the vacuum insulation material is mixed with calcium oxide and used as a getter material, thereby achieving improved initial thermal conductivity.
摘要:
The present invention relates to a sound absorbing sheet having excellent sound absorbing performance and surface decorative effects. The sound absorbing sheet of the present invention is characterized by comprising a base and having an average sound absorption of 0.4 or higher in a frequency range of 200 to 2000 Hz. The permeability and air porosity of a base layer of the sound absorbing sheet of the present invention may be adjusted, thereby achieving significantly superior effects of sound absorbing performance despite the thinness of the sound absorbing sheet.
摘要:
A Multiple Input Multiple Output (MIMO) antenna apparatus is provided. The apparatus includes antenna devices that operate in respective resonant frequency bands. The apparatus also includes a main board comprising a device region and a ground region. The antenna devices are disposed on the device region. The ground plate is disposed on the ground region for grounding the antenna devices. The apparatus also includes at least one isolation device having a negatively charged line that protrudes from the ground plate and extends between the antenna devices on the device region, and a positively charged line that extends around the negatively charged line and connects the antenna devices to each other. The isolation device induces an electromagnetic wave that is generated by the antenna devices between the negative and positively charged lines to isolate the antenna devices from each other.
摘要:
The present invention relates to a TDMA communication system using the position movement of a time slot. The TDMA communication system includes a TDMA network, a network central station, and terminals. The network central station includes a receiver for receiving transmission cycle information and time slot allocation requests from the terminals, a network central station controller for writing a degree of identification for the number of cases of time slot allocation according to the information transmission cycle, searching for an allocable optimum time slot, and withdrawing a time slot from a terminal which has finished communication, a time slot management unit for allocating a time slot to the terminal based on degree of identification for the number of cases of time slot allocation written by the network central station controller, and a transmitter for transmitting information about the allocated time slot to the terminal.
摘要:
The present invention relates to a TDMA communication system using the position movement of a time slot. The TDMA communication system includes a TDMA network, a network central station, and terminals. The network central station includes a receiver for receiving transmission cycle information and time slot allocation requests from the terminals, a network central station controller for writing a degree of identification for the number of cases of time slot allocation according to the information transmission cycle, searching for an allocable optimum time slot, and withdrawing a time slot from a terminal which has finished communication, a time slot management unit for allocating a time slot to the terminal based on degree of identification for the number of cases of time slot allocation written by the network central station controller, and a transmitter for transmitting information about the allocated time slot to the terminal.