Abstract: A composite sintered material includes: a plurality of diamond grains having an average grain size of less than or equal to 10 ?m; a plurality of cubic boron nitride grains having an average grain size of less than or equal to 2 ?m; and a plurality of aluminum oxide grains having an average grain size of less than or equal to 0.5 ?m; and a remainder of a binder phase, wherein at least parts of adjacent diamond grains are bound to one another, the binder phase includes cobalt, in the composite sintered material, a content of the diamond grains is from 30 to 92 volume %, a content of the cubic boron nitride grains is from 3 to 40 volume %, a content of the aluminum oxide grains is from 2 to 15 volume %, and a content of the cobalt is from 3 to 30 volume %.

Abstract: In the anti-skid brake control method of the present invention, braking pressure is controlled in such manner that it is transferred to pressure holding after it has been decreased for a predetermined time t.sub.1 when it is transferred from pressure increase to pressure holding during anti-skid brake control. Thus, the braking pressure held at a constant level can be maintained to a pressure approximately equal to the desired preset holding pressure. Therefore, the tendency of wheels to be locked can be prevented. As the result, the controllability of the anti-skid brake control can be improved without changing hardware arrangement of the relay valve and the like.

Abstract: A pressurized fluidized bed combustion boiler system comprising: a boiler; a filtration apparatus with ceramics filters in a flue gas system; and a louver separator as a primary stage dust separator disposed between the boiler and the filtration apparatus.

Abstract: A filtering method of flue gas of a boiler employing a filter apparatus integrated with ceramic filters and provided with a control mechanism for regenerating the ceramic filter by reverse cleaning and a detecting mechanism for detecting directly or indirectly unburnt component. Valves of a compressed gas are operated by a signal from the control mechanism when flying-over of the unburnt component is detected to thereby start at once frequent reverse cleaning wherein the compressed gas is blown into the cleaned gas spaces and thereafter the frequent reverse cleaning having a period shorter than four minutes continues until the flying-over of the unburnt component decreases to a small quantity.

Abstract: In the method for anti-skid brake control according to the present invention, start-up wheel speed (Vis) rapidly increasing from zero (0), when a vehicle is started is detected by a wheel speed sensor (8). When the start-up wheel speed (Vis) is higher than a first reference speed (Va), which is higher than lower limit speed of anti-skid brake control, and is lower than a second-reference speed (Vb), it is switched over to "select high" control when the start-up wheel speed (Vis) is on front wheel side, and the lower limit wheel speed (V.sub.L) of anti-skid brake control is set to the start-up wheel speed (Vis) when it is on rear wheel side. If the start-up wheel speed (Vis) is higher than the second reference speed (Vb), anti-skid brake control is prohibited for both front and rear wheel sides, and alarm lamp is lighted up. As the result, erroneous control in anti-skid brake control can be perfectly prevented when output characteristics of the sensor of the wheel speed sensor (8) are decreased.

Abstract: In a joint structure for a tube support plate and a tube, a ceramic tube is provided aligned with a retaining hole of a tube support plate cooled by cooling medium and a bellows is placed in or near the retaining hole. An end of the bellows is fixed directly or indirectly to the tube support plate and the other end thereof is linked to the ceramic tube.

Abstract: A supporting structure for ceramic tubes in a gas system in which a plurality of stages of tube support plates are provided in a substantially horizontal manner in a container, and ceramic tubes are supported with their axial lines being substantially vertical between the vertically adjacent tube support plates so that through holes formed in the tube support plates are communicated with the inner passages of the ceramic tubes, and metallic ring holders are respectively fitted to the outer periphery of the lower end portion of the tubes with interposed compacted layers while the metallic ring holders are in contact with the lower end faces of the tubes, and the ring holders are respectively in contact with and are supported by the tube support plates which are placed below the ring holders. Engaging means of the ceramic tubes to the tube support plates is also disclosed.

Abstract: In a joint structure for a tube support plate and a tube, a ceramic tube is provided aligned with a retaining hole of a tube support plate cooled by cooling medium and a bellows is placed in or near the retaining hole. An end of the bellows is fixed directly or indirectly to the tube support plate and the other end thereof is linked to the ceramic tube.

Abstract: In a joint structure for a tube support plate and a tube, a ceramic tube is provided aligned with a retaining hole of a tube support plate cooled by cooling medium and a bellows is placed in or near the retaining hole. An end of the bellows is fixed directly or indirectly to the tube support plate and the other end thereof is linked to the ceramic tube.

Abstract: A method and device for controlling a power steering device wherein a flow control valve unit is arranged between an oil pump and a power steering unit, the flow control valve unit being controlled to supply oil to the power steering unit at a flow rate corresponding to a vehicle speed, has the steps of determining whether or not the flow rate of oil supplied to the power steering unit corresponds to a value required in accordance with current steering conditions, and increasing the flow rate to a value so as to correspond to the steering conditions when the flow rate does not correspond to the current steering conditions.

Abstract: A control device for a power steering apparatus for controlling a torque applied to the power steering apparatus in accordance with a travel condition.A travel condition determining unit generates a travel condition signal in accordance with an average steering angle value and an average velocity value. A load determining unit generates a load signal in accordance with a sensed load condition. A correction signal generating unit generates a correction signal in accordance with the travel condition signal and the load signal. A memory stores a single reference control characteristic for the power steering apparatus. A correcting unit corrects the reference control characteristics in accordance with the correction signal to provide optimal power steering control.