54results about How to "Little change in characteristics" patented technology

An electrophotographic photoreceptor of high durability capable of providing stable excellent electrical characteristics over a prolonged period of time, which electrophotographic photoreceptor excels in mechanical strength. Photosensitive layer (14) of electrophotographic photoreceptor (1) comprises a polyarylate resin having structural units, for example, those of aforementioned formula (1-3) and an enamine compound represented by, for example, aforementioned formula (2-1). By virtue of these, electrophotographic photoreceptor (1) of excellent mechanical strength and favorable electrical characteristics can be realized.

An annular magnetic core that comprises an iron-based nanocrystalline soft-magnetic alloy, some of the iron in which is substituted with nickel and/or cobalt. Said annular magnetic core exhibits a relative AC permeability (μr100k(50)) of at least 4,000 at a frequency of 100 kHz in a 50 A/m applied DC magnetic field, a relative AC permeability (μr100k(150)) of at least 2,500 at a frequency of 100 kHz in a 150 A/m applied DC magnetic field, a maximum permeability (μMax) of at most 8,000 in a 400 A/m applied DC magnetic field, and a magnetic flux density (B400) of at least 1.3 T.

Disclosed is an adhesive composition (I) characterized by containing a polyurethane polyurea resin (A) having a weight average molecular weight of 80,000-250,000 and an acid number of 3-25 mgKOH/g and an epoxy resin (B). The polyurethane polyurea resin (A) is obtained by reacting a urethane prepolymer (d) having an isocyanate group, a polyamino compound (e) and a monoamino compound (f) under the conditions stated below. The urethane prepolymer (d) having an isocyanate group is obtained by reacting a polyol compound (a), an organic diisocyanate (b) and a diol compound (c) having a carboxyl group. (i) The ratio between isocyanate groups of the urethane prepolymer (d) having an isocyanate group and amino groups of the polyamino compound (e) and the monoamino compound (f), namely amino groups/isocyanate groups is from 0.8/1 to 0.999/1 (molar ratio). (ii) The ratio of amino groups of the polyamino compound (e) in the 100 mol% of the total of the amino groups of the polyamide compound (e) and the amino groups of the monoamino compound (f) is 90.0-97.0 mol%.

PROBLEM TO BE SOLVED: To provide a method for implanting ions into a semiconductor board which method compensates a threshold voltage gap between the central portion and the peripheral portion of the board created, as a result of uniformly implanting ions into the entire surface of the board, and to provide a manufacturing method for a semiconductor element which the manufacturing method improves the nonuniformity of transistor characteristics in the board.

The invention relates to a characteristic variable dynaic vibration absorber and a characteristic value variable vibration isolator.To solve a problem, for example, in which holding a movable mass becomes difficult because the spring characteristics of a rubber constituting a basis are set low in order to set the characteristic value at a low value. In a first dynamic vibration absorber (10A) including a movable mass that is coupled to a vibration damping target member (12) via an MRE as a first elastic member (18A) having elastic characteristics variable with a magnetic field, and being capable of varying a vibration characteristic value of the movable mass by controlling the magnetic field, the dynamic vibration absorber (10A) has a second elastic member (18B) different from the MRE, and the vibration damping target member and the movable mass are elastically-coupled to each other via the second elastic member(18B).

The embodiment of the invention discloses a feature selection method and device which can select measured target object features in spectral nondestructive testing, and have good robustness and stability. The method comprises: S1, acquiring a spectral data set of a sample; S2, performing a first quantity of sampling on the spectral data set to obtain a first quantity of sample spaces, constructinga partial least square quantitative analysis model by using each sample space, and ranking the features corresponding to the sample space in order of importance based on the partial least square quantitative analysis model; S3, ranking the features corresponding to the first quantity of sample spaces according to an importance ranking result of the features corresponding to the first quantity ofsample spaces to obtain a feature ranking result, determining a feature selection quantity based on the feature ranking result, and using the first feature selection quantity of features as the targetfeatures according to the feature ranking result.

The invention discloses a cloud dust-removal device for a metal mine roadway, including a steel frame structure, ultrasonic atomization nozzles, an inclined strut, a steel bottom plate, a water drainage diverter arranged on the steel bottom plate, a precise water filtering device, an air pressure gauge and a regulating valve thereof, a water flowmeter and a regulating valve thereof, and an air exhaust diverter. The steel frame structure is fixedly connected to the steel bottom plate. One end of the inclined strut is fixedly connected with the steel frame structure, and the other end is fixedlyconnected with the steel bottom plate. The steel frame structure is a gantry frame and is made of U-shaped steel, the opening direction of the U-shaped steel is the same as the air flow direction, the ultrasonic atomization nozzles are fixed to the front side and the left side and the right side of the U-shaped steel, the spraying angle is 80 degrees, the ultrasonic atomization nozzles on the front side directly face the air flow direction for spraying, and the ultrasonic atomization nozzles on the left side and the right side are staggered. By arranging the ultrasonic atomization nozzles with the spraying angle of 80 degrees, the whole roadway section can be filled with dry fog, the contact area between the dry fog and dust particles is fully increased, the dust removal effect is good, and the service life is long.

The invention relates to polymer electrolyte membrane, and membrane electrode assembly employing the membrane and solid polymer type fuel cell. A polymer electrolyte membrane comprising as a main ingredient a block copolymer which comprises, as its constituents, a polymer block (A) having as a main unit an aromatic vinyl compound unit and a polymer block (B) forming a flexible phase, and has ion-conducting groups on the polymer block (A), said aromatic vinyl compound unit being such that the hydrogen atom bonded to the alpha-carbon atom is replaced with an alkyl group or an aryl group optionally having substituent(s), and at least one of hydrogen atoms directly bonded to the aromatic ring is replaced with an alkyl group; and a membrane electrode assembly and a polymer electrolyte fuel cell both of which uses it. The polymer block (A) can further have a restraining phase, and/or can be cross-linked. The electrolyte membrane is mild to the environment, has a high ion conductivity and good bonding properties to electrodes, is excellent in moldability, and is not easily influenced by methanol; and displays excellent performance in polymer electrolyte fuel cells, particularly direct methanol fuel cells.

When a semiconductor film is irradiated with conventional pulsed laser light, unevenness, which is called as ridge, is caused on the surface of the semiconductor film. In the case of a top-gate type TFT, element characteristics are changed depending on the ridge. In particular, there is a problem in that variation in the plural thin film transistors electrically connected in parallel with one another. According to the present invention, in manufacturing a circuit including plural thin film transistors, the width LP of a region (not including a microcrystal region) that is melted by irradiating a semiconductor film with light of a continuous wave laser is enlarged, and active layers of a plurality of thin film transistors (that are electrically connected in parallel with one another) are arranged in one region.

A piezoelectric electroacoustic transducer includes a piezoelectric diaphragm having a substantially rectangular shape which vibrates in the thickness direction when an alternating current is applied between electrodes of the piezoelectric diaphragm, a housing which stores the piezoelectric diaphragm, and a pair of terminals formed in the housing by insert molding. One end of each terminal is inserted inside the housing and includes a body portion fixed to the housing and wing portions which extend from both sides of the body portion toward the corners of the housing. The wing portions are not fixed to the housing, and stress-relieving portions are disposed between the body portion and the wing portions so that the wing portions are able to move toward the inside of the housing. Each electrode of the piezoelectric diaphragm is connected to at least one of the wing portions of the terminals by a conductive adhesive.

A columnar vibrator (2) that performs open-ended bending vibration is mounted on one main surface of the mounting substrate (12), and a drive detection circuit is mounted across the abdomen centerline (n2) of the bending vibration caused by the resonance of the mounting substrate (12). Use part (13). In addition, the self-resonant frequency of the flexural vibration of the mounting substrate (12) is lower than that of the vibrator (2), and the self-resonant frequency of the flexural vibration after the vibrator (2) and the drive detection circuit parts (13) are mounted is lower than that of the vibrator (2). The self-resonance frequency of the bending vibration of the monomer is high, and is inconsistent with the bending vibration frequency of the vibrator (2). The present invention provides a vibrating top and an electronic device using the vibrating gyroscope with little change in characteristics between the time of characteristic adjustment before cover mounting and the completion time after cover mounting, although it has a thin mounting substrate and can be reduced in height.

The invention relates to the technical field of kinetics environment and discloses an all-metal impacting isolation gasket. The all-metal impacting isolation gasket comprises an S-shaped steel belt, and an upper space and a lower space of the S-shaped steel belt are filled with metal rubber rings. Through installation holes each of which is formed in a top-bottom alignment manner are sequentially formed in the S-shaped steel belt. The internal circular gaps of the metal rubber rings correspondingly communicate with the installation holes. The all-metal impacting isolation gasket adopts the composite structure of the S-shaped steel belt and metal rubber to reduce the impacting level, the composite structure is a pure metal product and is suitable for adverse using conditions, the single impacting isolation gasket is small in mass and meanwhile large in structural rigidity, and after being used, the all-metal impacting isolation gasket changes the character of an aircraft little and is good in effect of damping impacting.

The invention relates to a fiber cutting machine used for producing staple fibers. In the production of staple fibers, a tow of a plurality of polymeric filaments is cut into short staple fibers in the fiber cutting machine. In the known fiber cutting machines, knives of which have horizontally arranged knife edges, the knife flanks of the knives are arranged parallel to a knife rest axis. When the fiber cutting machine is used, the knife often fractures. The object of the present invention is to provide a fiber cutting machine with a horizontally arranged knife edge, which has a low risk of knife fracture without affecting the performance and the cutting power. This fiber cutting machine is achieved by oblique arrangement of the knife. The knife flank of the knife has a knife angle relative to the knife rest axis. By means of the fiber cutting machine according to the invention, particularly economic production of staple fibers can be realized.

The invention relates to a defibrillation energy storage capacitor and a charging circuit. A storage battery is sequentially connected with the charging circuit and a low-voltage energy storage capacitor. A first interface of a PWM chip IC1 of the charging circuit, a resistor R2 and a fourteenth interface of the IC1 are connected in series. A first interface of the IC1, the capacitor C1, the resistor R1 and a twelfth interface of the IC1 are connected in series; one path between the C1 and the R1 is connected with a 13th interface of the IC1; one path is connected with a capacitor C2 and thenconnected with a tenth interface of the IC1, and the other path is grounded; one path of a ninth interface of the IC1 is connected with a sixth interface of the IC1, one path is grounded after being connected with a capacitor C3, and one path is connected with a third interface of the dual operational amplifier IC2; an eighth interface of the IC1 is connected with a first interface of the IC2, a fourth interface of the IC2 is grounded, the eighth interface of the IC2 is connected with 12V, the fourth interface of the IC2 is respectively connected with the resistor R4 and the resistor R5, and afifth interface of the IC1 is connected with a seventh interface of the IC1 in series. Safety is guaranteed, waiting is not needed, stable and repeated charging and discharging can be achieved, the economic effect is good, and power consumption is reduced.