Abstract: A wind power generation system 10 of an embodiment includes a rotor 40 having blades 42, an airflow generation device 60 provided in a leading edge of each of the blades 42 and having a first electrode 61 and a second electrode 62 which are separated via a dielectric, a discharge power supply 65 applying a voltage between the electrodes of the airflow generation device 60, and a control unit 110 controlling the discharge power supply 65. The control unit 110 controls the voltage to perform pulse modulation so that the value of a relational expression fC/U is 0.1 or larger and 9 or smaller where f is a pulse modulation frequency of the voltage, C is a chord length of the blades 42, and U is a relative velocity combining a peripheral velocity of the blades 42 and a wind velocity, so as to generate plasma induced flow.

Abstract: A wind power generation system 10 of an embodiment includes a rotor 40 having a hub 41 and blades 42, a nacelle 31 pivotally supporting the rotor 40, a tower 30 supporting the nacelle 31, an airflow generation device 60 provided in a leading edge of each of the blades 42 and having a first electrode 61 and a second electrode 62 which are separated via a dielectric, and a discharge power supply 65 capable of applying a voltage between the electrodes of the airflow generation device 60. Further, the system includes a measurement device detecting information related to at least one of output in the wind power generation system 10, torque in the rotor 40 and a rotation speed of the blades 42, and a control unit 110 controlling the discharge power supply 65 based on an output from the measurement device.

Abstract: According to the present invention, there is provided a wind power generating system, having a plurality of plasma airflow generating units, each including a first electrode and a second electrode arranged being separated from the first electrode with a dielectric film and generating plasma airflow owing to dielectric barrier discharge when voltage is applied between the first electrode and the second electrode; and at least one plasma power source which supplies voltage to the plasma airflow generating units, wherein the plasma airflow generating units are arranged at a blade of the wind power generating system and are supplied with voltage as being separated into a plurality of lines separately for each of the lines.

Abstract: This invention provides an optimum value search apparatus, method, recording medium, and computer program product used in designing, analyzing, or testing a device having a plurality of factors that have effects on a characteristic. In this method, an orthogonal array is generated by setting level values obtained from the initial values of the factors to the coordinates of a two-dimensional table including a matrix of the characteristics and the factors. From the characteristics on the orthogonal array, characteristic values obtained on the basis of combinations of the level values of the factors of a single characteristic are grasped. A combination having a most excellent characteristic value is selected. The level values of the factors in the characteristic corresponding to the selected combination are reset in the orthogonal array. After resetting, processes are repeatedly executed to search for an optimum value as a most excellent one of the characteristic values.

Abstract: A drive belt includes an endless belt body made of an ethylene-?-olefin elastomer composition and a cord embedded in the belt body to form a spiral at a specified pitch in a widthwise direction of the belt. The drive belt has a bending stiffness not larger than 0.064 N·cm2 per a belt width of 4.8 mm and the belt body has a Wallace rubber hardness not smaller than 60°.

Abstract: A row of moving blades for a steam turbine has moving blades elongated radially which are arranged peripherally around and secured to a turbine rotor. The row also has an intermediate support structure for holding the blades to each other at a radially intermediate position. The support structure has a shape of a streamline cross section. The support structure may include a tie wire secured to the blades, or lugs protruding from the blades and combined to each other. The support structure may include lugs protruding from the blades to each other, and a sleeve combining the lugs. The shape of a streamline cross section may have an obtuse-angle or acute-angle upstream part.

Abstract: A flat belt (B) has a core-wire holding layer (11) extending in the longitudinal direction of the belt and having embedded therein core wires (14) arranged in a spiral pattern with a pitch in the lateral direction of the belt, and the flat belt (B) also has an inner rubber layer (12) provided on the inner peripheral side of the core wire holding layer (11) and making contact with pulleys. The core-wire holding layer (11) is constructed from a rubber composition containing short fibers (15) the amount of blend of which relative to 100 parts by mass of base rubber is 1 to 20 parts by mass and which are dispersed so as to be oriented in the lateral direction of the belt. The inner rubber layer (12) consists of a rubber composite not containing short fibers (15).

Abstract: A belt body (10) of a friction transmission belt (B) includes a pulley contacting portion (13) made of a rubber composition. The rubber composition forming the pulley contacting portion (13) includes an ethylene-?-olefin elastomer as a rubber component, and in the rubber composition, 10-50 parts by mass of calcium carbonate relative to 100 parts by mass of the rubber component, and carbon black whose DBP oil absorption amount measured according to the method A specified in Japanese Industrial Standards (JIS) K 6217-4 is 300 cm3/100 g or more are mixed.

Abstract: A friction drive belt (B) includes a pulley contacting portion (13) which is made of a rubber composition of an ethylene-?-olefin elastomer as raw rubber in which carbon black having an iodine adsorption number of 40 mg/g or lower, and 3-10 parts by mass of short aramid fiber (14) relative to 100 parts by mass of the raw rubber are blended.

Abstract: An elevator includes a car that ascends and descends in an elevation path, and at least one airflow generation device that is set on a surface of a top end part of at least one of upper and lower end parts of the car, the surface facing a platform of the elevation path, and suppresses a separation flow generated at the top end of the car during running, thereby to generate an airflow for rectifying an airflow flowing into a front side of the car.

Abstract: A turbine blade cascade structure includes a plurality of blades arranged in series in a circumferential direction on a wall surface, in which a corner portion defined by the wall surface and a front edge portion of each of blade bodies supported by the wall surface, to which a working fluid flows, includes a cover portion (fillet) that extends toward an upstream side of a flow of the working fluid. The turbine blade cascade structure is capable of reducing the secondary flow loss of the secondary flow in spite of the fluctuation of an incident angle of the working fluid flowing to the front edge portion of the blade body.

Abstract: A steam valve in accordance with the present invention is the steam valve that houses a first valve device 21 composed of a valve seat, a valve body, a valve rod, and a driving device, and a second valve device 22 composed of the valve seat, the valve body, the valve rod, and the driving device, combined with each other in the valve casing 23, and a closing portion 41 to block a part of a main steam flow flowing from outside to inside of a strainer is formed in the strainer 27 that is housed in the valve casing 23 and that surrounds the valve body 29 of the first valve device. According to the above described configuration, the steam valve that is aimed to further decrease a pressure loss can be provided by effectively controlling the steam flow in the strainer housed in the valve casing.

Abstract: The present invention provides a method for producing hydrogen peroxide, comprising the steps of: alternately reducing and oxidizing a working solution containing anthraquinone compounds as a reaction medium, wherein a mixture of alkyl-substituted anthraquinones and alkyl-substituted tetrahydroanthraquinones in a molar ratio of from 2:1 to 8:1 is used as the anthraquinone compounds in the working solution, in the reduction step all of the tetrahydroanthraquinones and some or all of the anthraquinones in the working solution are reduced; and keeping the content of alkyl-substituted anthrahydroquinones in the working solution after the reduction step and before the oxidation step higher than the content of alkyl-substituted tetrahydroanthrahydroquinones, wherein ethylanthraquinone and ethyltetrahydroanthraquinone are used as anthraquinone compounds in the working solution in a total proportion of both of from 10 to 45 mol % of all of the anthraquinone compounds in the working solution.

Abstract: Cyclic onium compounds reresented by the following structural formula (I), glucosidase inhibitors using such compounds, and antidiabetic drugs or food containing such glucosidase inhibitor. wherein A? is an aniom; m is an interger between 1 and 6, n is 0 or 1, X+ is S+ or N+Q (where Q is H or an alkyl of 1 to 4 carbon atoms).

Abstract: A row of moving blades for a steam turbine has moving blades elongated radially which are arranged peripherally around and secured to a turbine rotor 9. The row also has an intermediate support structure for holding the blades each other at a radially intermediate position. The support structure has a shape of streamline cross section. The support structure may include a tie wire secured to the blades, or lugs protruding from the blades and combined to each other. The support structure may include lugs protruding from the blades to each other, and a sleeve combining the lugs. The shape of streamline cross section may have an obtuse-angle or acute-angle upstream part.

Abstract: The present invention provides a method for producing hydrogen peroxide, comprising the steps of: alternately reducing and oxidizing a working solution containing anthraquinone compounds as a reaction medium, wherein a mixture of alkyl-substituted anthraquinones and alkyl-substituted tetrahydroanthraquinones in a molar ratio of from 2:1 to 8:1 is used as the anthraquinone compounds in the working solution, in the reduction step all of the tetrahydroanthraquinones and some or all of the anthraquinones in the working solution are reduced; and keeping the content of alkyl-substituted anthrahydroquinones in the working solution after the reduction step and before the oxidation step higher than the content of alkyl-substituted tetrahydroanthrahydroquinones, wherein ethylanthraquinone and ethyltetrahydroanthraquinone are used as anthraquinone compounds in the working solution in a total proportion of both of from 10 to 45 mol % of all of the anthraquinone compounds in the working solution.

Abstract: This invention provides an optimum value search apparatus, method, recording medium, and computer program product used in designing, analyzing, or testing a device having a plurality of factors that have effects on a characteristic. In this method, an orthogonal array is generated by setting level values obtained from the initial values of the factors to the coordinates of a two-dimensional table including a matrix of the characteristics and the factors. From the characteristics on the orthogonal array, characteristic values obtained on the basis of combinations of the level values of the factors of a single characteristic are grasped. A combination having a most excellent characteristic value is selected. The level values of the factors in the characteristic corresponding to the selected combination are reset in the orthogonal array. After resetting, processes are repeatedly executed to search for an optimum value as a most excellent one of the characteristic values.

Abstract: Cyclic onium compounds reresented by the following structural formula (I), glucosidase inhibitors using such compounds, and antidiabetic drugs or food containing such glucosidase inhibitor. wherein A? is an aniom; m is an interger between 1 and 6, n is 0 or 1, X+ is S+ or N+Q (where Q is H or an alkyl of 1 to 4 carbon atoms).

Abstract: A drive belt includes an endless belt body made of an ethylene-?-olefin elastomer composition and a cord embedded in the belt body to form a spiral at a specified pitch in a widthwise direction of the belt. The drive belt has a bending stiffness not larger than 0.064 N·cm2 per a belt width of 4.8 mm and the belt body has a Wallace rubber hardness not smaller than 60°.

Abstract: A turbine blade cascade structure includes a plurality of blades arranged in series in a circumferential direction on a wall surface, in which a corner portion defined by the wall surface and a front edge portion of each of blade bodies supported by the wall surface, to which a working fluid flows is provided with a coating portion that extends toward an upstream side of a flow of the working fluid. The turbine blade cascade structure is capable of reducing the secondary flow loss of the secondary flow in spite of the fluctuation of an incident angle of the working fluid flowing to the front edge portion of the blade body.