Abstract: A heat dissipation assembly includes a heat sink and a fan. The heat sink includes a plurality of fins. The plurality of fins is parallel with each other. Each of the plurality of fins includes two side faces. Each side face is waved. An air channel is located between two adjacent side faces of two adjacent fins. The air channel includes a plurality of wide portions and a plurality of narrow portions interlaced with the plurality of wide portions. The fan is located on a side of the air channel. The fan is adapted to drive air flowing fast in the plurality of narrow portions of the air channel and flowing slow in the plurality of wide portions of the air channel.

Abstract: A heat dissipation system includes a computer case has a base plate and a back plate, a heat sink, a second heat source, and an air partition panel. The back plate defines a plurality of first air outlet holes aligned with the heat sink, and a plurality of second air outlet holes aligned with the second heat source. The heat sink is positioned on the base plate in contact with a first heat source. The second heat source is positioned on the base plate adjacent to the base plate. The air partition panel is positioned on the base plate between the motherboard and the second heat source. A first air path is defined between the air partition panel and the plurality of first air outlet holes. A second air path is defined between the air partition panel and the plurality of second air outlet holes.

Abstract: A computer system includes a chassis and an airflow guiding duct. The chassis includes a chassis bottom wall, a chassis front wall and a chassis rear wall. The chassis front wall defines a first ventilation hole, and the chassis rear wall defines a second ventilation hole. A motherboard is secured to the chassis bottom wall between the chassis front wall and the chassis rear wall. A memory card is secured to the motherboard. The airflow guiding duct is secured in the chassis and includes an entrance portion. The entrance portion covers a portion of the memory card, so as to guide airflow. Airflow flows in the chassis via the first ventilation hole, over the memory card, and then out of the chassis via the second ventilation hole.

Abstract: A portable diagnostic device for cervical precancerous lesions is disclosed. The device includes an inherent fluorescence detection system for cervical cancer, a cervix acetic acid coloring detection and an image collection system. The inherent fluorescence detection system for cervical cancer has a light source and a switch, which consists of a excitation light source that generates fluorescence and a cold light source that generates white light, both the excitation light source and the cold light source are installed in the bowl-shaped reflector with specific focal length. The cervix acetic acid coloring detection system has an acetic acid pool, a spraying tube that connects with the acetic acid pool, a spraying tube moving device, and a spraying switch. The image collection system has a weak light CCD, which is installed in the center of the bowl-shaped reflector.

Abstract: A computer system includes a chassis and an airflow guiding duct. The chassis includes a chassis bottom wall, a chassis front wall and a chassis rear wall. The chassis front wall defines a first ventilation hole, and the chassis rear wall defines a second ventilation hole. A motherboard is secured to the chassis bottom wall between the chassis front wall and the chassis rear wall. A memory card is secured to the motherboard. The airflow guiding duct is secured in the chassis and includes an entrance portion. The entrance portion covers a portion of the memory card, so as to guide airflow. Airflow flows in the chassis via the first ventilation hole, over the memory card, and then out of the chassis via the second ventilation hole.

Abstract: A heat dissipating assembly includes a heat exchanger and an air duct. The heat exchanger includes a plurality of fins aligned in a row, and the fins cooperatively define a plurality of heat dissipating channels. A guiding slot is defined in the heat exchanger. The air duct defines a passage. A positioning hook extends from the air duct and engages in the guiding slot to so that the air duct passage and are aligned with the heat dissipating channels so that an air flow is capable of passing through the air duct passage via the heat dissipating channels.

Abstract: A optical Biopsy method and an apparatus are used in the diagnosis of precancerous lesion for locating the place and determining the level of malignant tumor. The apparatus comprises light source (1, 10) a light channel system, an endoscope (21) and a circuit system. The light sources include an excited light (1) and a cold light source (10). The cold light source and the excited light in the light channel system go through the end of the light guide of the endoscope via optical fiber bundle and irradiate the tested living tissue (22). The white light image signal and the intrinsic fluorescence image signal reflected from the tested living tissue (22) are received by a weak fluorescence CCD (6) that tightly connects to the end of the endoscope (21) and then transmit to the circuit system via a signal wire (9) to produce the image in the display (17).

Abstract: This invention relates to a diagnostic apparatus and particularly to an apparatus for the diagnosis of malignant tumor and the method of using the apparatus for diagnosis. The apparatus employs an ultraviolet light source with an emitting waveband of 3000A-4000A. Light from the light source is transmitted through a bundle of quartz optic fibers to the surface of the tumor, whether benign or malignant, to stimulate it, which then generates a specific intrinsic fluorescence spectrum. The intrinsic fluorescence spectrum reflected from the surface of the tumor is transmitted by a second bundles of glass fibers placed near it to a color resolution means, then processed by a scanning means and a circuit means, and displayed recorded by a display recording means. The display may be a graphic presentation of the intrinsic fluorescence spectrum of the tumor that is tested.