41results about How to "Increase rms" patented technology

A lining for use under head gear—such as baseball hats, top hats, helmets, cowboy hats, hard hats, beanies, stocking caps, etc.—comprised of two layers, one specifically for comfort, in both softness and breathability, and a second specifically for the filtering of salt, dirt, oils, particulate matter and other undesirable constituents contained in the sweat of the wearer. The two layers are each comprised of four roughly equal pieces of an isosceles triangular shape that are stitched together to form a half-dome. The two layers are then stitched together along the bottom circumference of said dome two form a single half-dome comprised of two individual layers. The two layers employ their relative absorbency to transport moisture from the head of the wearer and into the lining. The outer layer employs its maximal surface area to filter and store the sweat of the wearer, while maintaining breathability. Together the two layers form a lining that both protects the head gear from stains, discoloration, premature wear and odors, maximizing the effective lifespan of the head gear, while also maximizing for the wearer comfort both in terms of fit and breathability, maximizing the effective value of the head gear for the wearer.

The invention relates to a method for detecting inrush current distortion of a transformer based on a Rogowski coil, which belongs to the technical field of relay protection of electric power systems. The method comprises the following steps of: measuring primary side current of the transformer to acquire a differential voltage analog signal; acquiring a corresponding differential voltage digitalsignal; judging whether abnormal current occurs or not; performing cosine window-added Fourier transform on the differential voltage digital signal to solve effective values of every-time harmonic waves; calculating the degree of distortion, namely judging whether inrush current occurs or not according to the degree of distortion, and the like. By the method, the conditions that incorrect tripping of differential protection during on-load switch-on of the transformer is prevented and exciting current and fault current are strictly distinguished are ensured, a criterion value has extremely high redundancy, and the degree of distortion is accurately and reliably determined.

The invention provides a raw material skin unhairing method which comprises the following steps: firstly, under the action of composite enzyme depilatory, soaking raw material skin soaked in water into the depilatory to remove hair, taking out, thereby obtaining a half finished unhaired product; spraying a protein inhibition protecting liquid on the surface of the half finished unhaired product obtained in the former step, standing, and shaving, and thereby obtaining unhaired raw material skin, wherein the protein inhibition protecting liquid is a mixed liquid of a protease activity inhibitor and an animal skin protein protecting agent. As the animal skin composite enzyme is adopted to remove hair, association of hair follicle and hair papilla to hair roots can be effectively broken, a relatively rapid and relatively ideal hair root loosening effect can be achieved, damage to a loose side and a grain side can be reduced, and moreover after the hair roots at fiber loosened parts are loosened, as the mixed liquid of the protease activity inhibitor and the animal skin protein protecting agent is applied or spayed, over-action of protease can be avoided, and defects such as loose side and grain side loss can be further avoided.

A feedback circuit has an optical coupler with a feedback gain control. The feedback gain control includes an active element connected to vary current flow depending on changes in gain of the optical coupler.

Embodiments of the invention disclose a card sorting method and apparatus, a server and a storage medium, and relate to the technical field of the internet. The method comprises the steps of obtainingat least two applications corresponding to each card in multiple cards, and obtaining at least one influence factor of each application in at least two applications in a first preset time; accordingto the at least one influence factor and a first weight value corresponding to each influence factor in the at least one influence factor, obtaining a first weighted parameter value of each application; according to the first weighted parameter value of each application, obtaining a first weighted parameter value of each card; and according to the first weighted parameter value of each card, pushing multiple cards to a client for performing display according to a first preset sorting mode. According to the card sorting method and apparatus, the server and the storage medium, the cards can be dynamically sorted, so that the effective value of card recommendation is improved.

A power-factor correcting converter includes: a series circuit including a first higher-potential switch and a first lower-potential switch connected in series to each other; and another series circuit including a second higher-potential switch and a second lower-potential switch connected in series to each other. In a positive phase period of the input AC voltage, a control circuit turns off the second higher-potential switch, turns on the second lower-potential switch, and alternately turns on and off the first lower-potential switch as a master switch and the first higher-potential switch as a slave switch. In a negative phase period of the input AC voltage, the control circuit reverses the on/off operation and the master/slave relationship, and turns on and off only the master switch and turns off the slave switch when the absolute value of the input AC voltage is smaller than or equal to a predetermined value.

An active matrix array device comprises an array of device elements, each device element having an associated circuit. Each circuit comprises an addressing switch (14) and a storage capacitor (20) for maintaining a voltage applied to the device element (16) through the addressing switch (14). Each circuit is associated with a gain element (36), and the storage capacitor (20) is in a feedback path of the gain element. The gain element (36) is used as a way to increase the effective value of the storage capacitor, so as to provide an improvement in the performance of active matrix devices.

Provided is a heat transfer device which has a function of generating power through vibration of capillary grooves having a thin piezoelectric film deposited thereon, in addition to a heat transfer function of discharging heat transferred from a heating element to the outside.

The invention discloses a method for improving stability of blueberry anthocyanin through attapulgite. The method is characterized in that attapulgite is promoted to disperse through high-speed pulping, the specific surface area of attapulgite is increased, and anthocyanin is sufficiently combined with the attapulgite through wet-process grinding, so that an anthocyanin-attapulgite mixture is obtained. The method is simple to operate, is low in cost, greatly prevented the anthocyanin from being damaged, improves the stability and the anti-oxidization activity of blueberry anthocyanin, and has relatively good application value and a relatively good development prospect.

The invention provides an identification system and method for the circuit state of a rail. The system comprises multiple micro control units used for conducting information collection and processingon a local power source and one or more rail power sources. Each micro control unit comprises a sampling filtering module, a calibration module, a phase deviation acquisition module and a state identification module. The sampling filtering module is connected to the rail power sources; the calibration module is connected to the sampling filtering module; the phase deviation acquisition module is connected to the calibration module; the state identification module is connected to the phase deviation acquisition module. By means of the system, the accuracy, safety and reliability of identifyingthe circuit state of the rail by a rail circuit electronic receiver can be improved.

The invention provides a vehicle battery self-heating method and device, and the method comprises the steps: in responce to a request signal for heating a battery, a periodic signal with a set frequency is output to a vehicle battery self-heating device; an LC oscillation unit in the vehicle battery self-heating device is connected with a battery; the periodic signal comprises a first electric signal and a second electric signal which are alternate, and the first electric signal controls the LC oscillation unit and the battery to form a charging loop; the second electric signal controls the LC oscillation unit and the battery to form a discharge loop; and the set frequency is greater than the resonant frequency of the LC oscillation unit. By adopting the scheme provided by the invention to perform self-heating on the battery, a PTC (Positive Temperature Coefficient) heater does not need to be additionally arranged, the structure of the battery system is simplified, the cost is reduced, and on the other hand, the self-heating mode of the battery has higher heating efficiency and better uniformity.

A magnetically coupled reactor and a DC/DC converter are provided between a DC power supply and an inverter. A first smoothing capacitor is provided between the DC power supply and the coupled reactor. A second smoothing capacitor is provided between the DC/DC converter and the inverter. A controller is provided in order to control switching operations of the inverter and the DC/DC converter. The controller causes semiconductor switching elements composing upper and lower arms of the DC/DC converter to perform complementary operations so as to be alternately turned on/off, and causes left and right legs to operate with their switching phases shifted from each other, thereby electric charges stored in both smoothing capacitors are discharged by energy loss in the coupled reactor and the DC/DC converter.

The invention relates to a cooling structure of an engine bearing block, and belongs to the field of engines. By adopting the cooling scheme of the engine bearing block, the cooling structure has theadvantages that the better cooling effect is realized for the bearing block at the heat end part of the engine; by reducing the heat load of the bearing block, the vibration of a bearing in an inner cavity of the bearing block is reduced in the working process of the engine, the purpose of protecting the bearing is realized, the working stability of the engine is improved, and the service life ofthe bearing is prolonged.

The invention discloses a dynamic response servo system control system. The dynamic response servo system control system comprises a speed loop, a current loop and an amplifier. The speed ring, the current ring and the amplifier are sequentially connected in series; the amplifier is connected with the current loop through a current feedback circuit; closed-loop control is carried out on a motor current, the output of the speed ring is the given q-axis current of the motor, the output of the current loop is a three-phase voltage reference, the amplifier amplifies the three-phase voltage reference to drive the motor, and the current loop adopts a decoupling algorithm to compensate the angle of the rotating shaft of the motor and the d-axis voltage and the q-axis voltage respectively, so thatthe effective value of the phase current is suppressed, and the control of a high-dynamic response servo system is achieved.

The invention relates to a transparent display vehicle window based on a double-sided display function and a sequential control method thereof. The transparent display vehicle window based on the double-sided display function comprises a vehicle window body, a transparent display screen and an electric roller shutter film. The vehicle window body comprises outer side glass, a spacer and inner sideglass. The display surface of the transparent display screen faces the inner side of the vehicle window body; the display surface is provided with a first display area and a second display area; theelectric roller shutter film is positioned between the transparent display screen and the inner side glass; the electric roller shutter film is arranged to be unfolded or folded in a roller shutter mode. When the electric roller shutter film is unfolded, the electric roller shutter film is opposite to the first display area so as to reflect a picture displayed by the first display area; therefore,the reflection picture is overlapped with the picture displayed in the first display area so as to enhance display, the picture can be displayed through the back face of the first display area, the back face of the first display area is displayed outwards, the second display area is displayed inwards, and the double-face display function of the transparent display screen is achieved.

The embodiment of the invention provides an inquiry service evaluation content generation method and device, and the method comprises the steps: obtaining the inquiry data of the inquiry service; identifying at least one item of behavior characteristic data from the inquiry data; according to the behavior characteristic data and a preset question matching rule, outputting at least one evaluation question of the inquiry service from a preset question library; according to the behavior characteristic data and the evaluation problem, outputting a corresponding evaluation guide label for the evaluation problem; and according to the evaluation problem and the corresponding evaluation guide tag, generating evaluation content of the inquiry service. According to the embodiment of the invention, the method avoids the generation of all-round evaluation content for any patient, increases the pertinence of the inquiry content to the inquiry service, can guide the patient to fill in the evaluation result for the inquiry service, improves the relevance between the evaluation content and the inquiry service, and improves the effective value of the evaluation result.

The invention discloses an environment-friendly chopsticks, comprising two first chopsticks bodies and two second chopsticks bodies, the first chopsticks bodies and the second chopsticks bodies are connected by a screw cap and a device arranged on the first chopsticks bodies It is threadedly connected with the screw head on the second chopsticks body, a storage tank is arranged outside the first chopsticks body, a fan body is arranged in the storage tank, a pull hook is arranged on one side of the fan body, and one of the first chopstick body The inner side of one chopsticks body is provided with locking teeth, the other said first chopsticks body is provided with locking grooves, the inside of said first chopsticks body and said second chopsticks body are both provided with cavities, and said first chopsticks body is far away from the One end of the second chopsticks body is slidably connected with a pull tube, and the mouth of the pull tube is provided with a blocking piece, and the blocking piece overlaps the port of the first chopsticks body. Beneficial effects: the utility model is simple in structure, easy to use, has multiple functions such as chopsticks, straws and fans, increases the use value of the chopsticks, is recyclable, and is convenient to carry.