摘要:
An electrically-controlled throttle valve apparatus includes a motor, a speed reducing mechanism for reducing the rotation speed that is transmitted from the motor, a throttle valve connected to the speed reducing mechanism, and a force applying arrangement for applying force to the throttle valve in the direction of returning the valve to its initial position and for adjusting the opening of the throttle valve by driving the motor. Specification parameters of the motor, the speed reducing mechanism, and the force applying arrangement have values such that the operation time t from the minimum opening to the maximum opening of the throttle valve, which is determined by an evaluation equation obtained from equations of motion of the throttle valve, is less than a prescribed target operation time t* of the throttle valve. Furthermore, the resistance and the induction voltage constant of the motor are determined so as to satisfy a constraint equation obtained based on Ohm's law.
摘要:
An X-ray computerized tomography apparatus includes n number of X-ray detector arrays. Each of X-ray signals detected by the detector arrays during helical scan is stored associated with an angle of a rotating gantry and the position of a top board. Also, each of the X-ray signals is stored associated with an angle differing by 180 degrees and the corresponding position of the top board. A pair of first and second X-ray signals for the same angle of the gantry is selected for each of predetermined angles ranging from 0.degree. to 360.degree.. The first X-ray signal corresponding to the first position closest to the position of a plane section of a subject under examination and the second X-ray signal corresponding to the second position that is closest to the position of the plane section on the opposite side of the first position for the first X-ray signal with respect to the position of the plane section are subjected to weighted-averaging according to their distance from the position of the plane section. A tomogram of the plane section is reconstructed from the results of the weighted-averaging.
摘要:
An X-ray computerized tomography apparatus includes n number of X-ray detector arrays. Each of X-ray signals detected by the detector arrays during helical scan is stored associated with an angle of a rotating gantry and the position of a top board. Also, each of the X-ray signals is stored associated with an angle differing by 180 degrees and the corresponding position of the top board. A pair of first and second X-ray signals for the same angle of the gantry is selected for each of predetermined angles ranging from 0.degree. to 360.degree.. The first X-ray signal corresponding to the first position closest to the position of a plane section of a subject under examination and the second X-ray signal corresponding to the second position that is closest to the position of the plane section on the opposite side of the first position for the first X-ray signal with respect to the position of the plane section are subjected to weighted-averaging according to their distance from the position of the plane section. A tomogram of the plane section is reconstructed from the results of the weighted-averaging.
摘要:
A mowing machine is provided with its cutting head employing one or more flexible cutting lines such as Nylon cords which serve to cut grasses during rotation of the cutting head. The free end portions of the cutting lines extend radially outwardly from a casing through openings in an annular inertai shifter which is housed in the casing for vertical and angular movements relative to the casing.
摘要:
A mowing machine is provided with its cutting head employing one or more flexible cutting lines such as Nylon cords which serve to cut grasses during rotation of the cutting head. The free end portions of the cutting lines extend radially outwardly from a casing through openings in an annular inertia shifter which is housed in the casing for vertical and angular movements relative to the casing.
摘要:
A chain saw having front and rear handles disposed at the front and rear parts of an engine block for driving a saw chain. The front and rear handles are connected at their one ends to the engine block in a vibration absorbing manner through respective vibration damping members. The other ends of the front and rear handles are arranged to oppose to each other at two points and are connected to each other at these two points in a vibration absorbing manner through respective vibration damping members. At least one of the vibration damping members connecting the other ends of the handles is fixed to the engine block.
摘要:
A chain saw having a saw chain adapted to be driven by an engine. The engine has a cylinder and a crank case separable from each other. The crank case has cooling air guide walls formed integrally therewith and extending along the upper and lower sides of the cylinder.
摘要:
An activated carbon material having a BET specific surface area of 10 to 1,000 m2/g as measured by means of a nitrogen adsorption method, and the ratio of the height of the D peak (1,360 cm−1) of a Raman spectrum of the activated carbon material to that of the G peak (1,580 cm−1) of the Raman spectrum is 0.8 to 1.2. When the activated carbon material of the present invention is used as a polarizable electrode material of an electric double layer capacitor, high capacitance per electrode is attained without application of excessive voltage.
摘要:
According to the present invention, a subject is prompted to take breaths that are different at least in depth, and the subject's motion associated with respiration is captured. A timing when the subject is scanned is controlled according to the captured motion of the subject associated with respiration. A two-dimensional detector formed like a two-dimensional plane detects an X-ray beam having passed through the subject. Data is collected from the two-dimensional detector to acquire volume data on the subject.
摘要:
The angle of each collimator plate with respect to an X ray focal point is determined by fitting the collimator plate in grooves formed in upper and lower supports each having an integral structure. In addition, the warpage of each collimator plate is corrected and its flatness is maintained by fitting the periphery of the collimator plate which is on the X ray detector side in a corresponding groove of an abutment plate provided on the X ray detection surface side of the upper and lower supports. Furthermore, each collimator plate is supported by the corresponding grooves of the upper and lower supports and the corresponding groove of the abutment plate on at least three sides.