145results about How to "Simple modulation" patented technology

The invention relates to a display device for holographic reconstruction. The display device comprises a spatial light modulator device having combined phase modulating pixels and amplitude modulating pixels, an illumination unit generating sufficiently coherent light and arranged to illuminate of the spatial light modulator device and a reflection plane. The device being arranged such that light enters the spatial light modulator device and passes both the phase modulating pixel and the amplitude modulating pixel of the spatial light modulator device. The light is reflected by the reflection plane in between.

A radio-frequency-identification (RFID) system includes an RFID tag and an RFID reader, where the RFID reader is configured to communicate with the RFID tag using time-hopped pulse-position modulation and ultra-wideband modulation. The time-hopped pulse-position modulation includes sending from the RFID tag to the RFID reader a series of pulses in time slots selected by the RFID tag through a cryptographically secure pseudo-random generator.

A power converting apparatus generates a carrier having a waveform in which an absolute value of a slope is constant with respect to time, based on a value for internally dividing amplitude of the waveform into first and second values. Commutation of a converter is performed when the carrier takes a reference. Adoption is allowed of a zero voltage vector as a switching mode of an inverter in a period in which the carrier takes a first command value to a second command value. A value for internally dividing a value from the reference to a maximum value of the carrier at a ratio between a third value and a fourth value is the first command value. A value for internally dividing a value from a minimum value of the carrier to the reference at a ratio between the third value and the fourth value is the second command value.

The invention provides a frequency shift keying (FSK) optical modulation signal generator based on a silicon-based micro ring resonator, comprising an adjustable laser, a radio frequency signal generator, a Mach-Zehnder modulator, a data source and a silicon-based micro ring resonator system, wherein the adjustable laser is connected with the input end of the Mach-Zehnder modulator to transmit optical carrier signals, the radio frequency signal generator is connected with the radio frequency interface of the Mach-Zehnder modulator to transmit high frequency electric signals, the output end of the Mach-Zehnder modulator is connected with the silicon-based micro ring resonator system to transmit carrier suppression optical signals, and the data source is connected with the silicon-based micro ring resonator system to transmit electric signals with adjustable amplitude. The silicon-based micro ring resonator used in the invention has simple structure and small volume, easy integration, simple modulation, convenient control and high modulation velocity which is up to a plurality of Gbit/s, and the radius of the micro ring is only a plurality of microns to dozens of microns.

The invention relates to an atomic spin procession detecting method and an atomic spin precession detecting device based on electro-optic modulation. Alkali metal atoms in a spin-exchange relaxation free state are used for sensing an external magnetic field or angular rate, thereby generating atomic spin Larmor precession. An electro-optic modulator is used for performing electro-optic modulation on detected laser. Through output light strength detection by the electro-optic modulator and demodulation of a phase-locked amplifier, output light strength and frequency doubling signal strength are obtained. Finally a signal acquisition and processing circuit measures an atomic spin precession signal, and furthermore measurement to the external magnetic field or inertia can be realized. According to the atomic spin procession detecting method and the atomic spin procession detecting device, advantages such as simple modulation, small size, high sensitivity, low temperature effect and simple operation condition in the electro-optic modulator are exerted. The atomic spin procession detecting method and the atomic spin procession detecting device have relatively high sensitivity and relatively high stability. The novel atomic spin procession detecting method is based on an atomic spin effect and can be used for industrial integration and practical application of atomic spin sensing devices in future.

The invention discloses a modulation method and product of a terahertz metamaterial and belongs to the field of metamaterials. The method comprises the steps that firstly, a periodic cylindrical air cavity is formed in a substrate of a PDMS material, then a flexible medium PDMS thin film is arranged above the air cavity, and the metamaterial is arranged on the PDMS thin film; then, outside pressure is added, so that the flexible medium PDMS thin film above the air cavity is protruding or sunken, then geometric parameters of the metamaterial on the PDMS thin film are changed, and finally the response to the incident terahertz wave is modulated. The invention further provides the product which achieves the modulation method. The product comprises a metamaterial structure and a PDMS substrate, the metamaterial structure is arranged on the PDMS substrate, the metamaterial comprises the PDMS thin film and a two-dimension periodic array which is arranged on the PDMS thin film, and the periodic cylindrical air cavity is formed in the PDMS substrate. The modulation method is simple and reliable, is easily controlled, and is relatively high in modulation performance of the linearly polarized beam and the circularly polarized light.

A method for modulating a work function of a semiconductor device having a metal gate structure including the following steps is provided. A first stacked gate structure and a second stacked gate structure having an identical structure are provided on a substrate. The first stacked gate structure and the second stacked gate structure respectively include a first work function metal layer of a first type. A patterned hard mask layer is formed. The patterned hard mask layer exposes the first work function metal layer of the first stacked gate structure and covers the first work function metal layer of the second stacked gate structure. A first gas treatment is performed to the first work function metal layer of the first stacked gate structure exposed by the patterned hard mask layer. A gas used in the first gas treatment includes nitrogen-containing gas or oxygen-containing gas.

The invention discloses a regulating and controlling method and logic of self-adaption commutation integration of a high frequency chain matrix inverter, belonging to the regulating and controlling technology of power electronic power convertor. The invention is composed of a PWM information generating link (1), a self-adaption safe commutation integration logic processing circuit (2) and a controlled object high frequency chain matrix inverter (3), wherein PWM information which is produced by the PWM information generating link for classic inverter sinusoidal output is processed with the self-adaption safe commutation integration method and logic to control a high frequency chain circuit into a common voltage inverter or current inverter, thus obtaining a driving control signal used for the high frequency chain matrix inverter, and realizing energy double flow and four-quadrant operation. The invention has the advantages that the system has explicit working state and low regulation complexity, and the principle is easy to realize; the safe commutation of the system can be realized without commutation current detection and assistant circuit self-adaption used by traditional regulation and control. Thus the invention has wide application prospect in the fields of new energy power generation, motor speed regulation and the like.

The invention relates to the fields of new energy power generation and energy management thereof, specifically to a microgrid current conversion and energy storage apparatus and an energy management method therefor. The microgrid current conversion and energy storage apparatus comprises a six-switch seven-level single-phase inverter unit, a bidirectional DC/AC converter unit for a storage battery, a bidirectional DC/AC converter unit for a supercapacitor, a micro current converter energy storage apparatus control and energy management unit, a photovoltaic MPPT unit, a storage battery charging-discharging management unit, a supercapacitor charging-discharging management unit and a load management unit. By adoption of the microgrid current conversion and energy storage apparatus and the energy management method therefor, photovoltaic energy can be converted into electric energy to be connected to a power grid; power fluctuation balance of the system through peak-load shifting can be realized by the energy storage apparatus according to the energy flowing condition of the system; by adoption of the six-switch seven-level single-phase inverter, the apparatus is less in required power switching devices, low in switching loss, and high in output electric energy quality; the energy storage apparatus adopts the bidirectional DC/AC converters, so that compared with the conventional current converter, the energy storage apparatus has the advantages of less switching devices, wide voltage output range, simple SPWM modulation and the like; and therefore, the energy storage apparatus has wide application prospect in the microgrid application field.

The invention relates to a production technique of vegetable protein milk powder, which pertains to the technical field of deep processing of subsidiary agricultural products. The vegetable protein milk powder adopts high quality broad bean as raw material and is acquired through the processes of peeling off, dipping, grinding into thick liquid, extracting, zymohydrolysis, concocting, homogenating, drying, etc. The product is a novel dairy product, has the same properties with common milk powder, as good nutrition ingredients and biological potency as evaporated skimmed milk powder, good palatability and no cholesterol, and is suitable for both the old and the young; having rich raw material sources, low cost, standardized process and simple operation, the product can be produced at large scale and is expected to become a popular nutritious food to benefit mankind.

The invention relates to a veterinary medicine, in particular to a Chinese traditional medicine composition for treating proventriculitis of chicken.The Chinese traditional medicine composition consists of codonopsis pilosula, cortex cinnamomi, radix astragali, white atractylodes rhizomes, endothelium corneum gigeriae galli, betel nuts, montmorillonite, cuttlebone, cortex moutan and licorice roots.Related experiments show that the Chinese traditional medicine composition has the functions of warming yang, dispelling cold, invigorating spleen, supplementing qi, benefiting the liver, invigorating the stomach and removing the necrotic tissues and promoting granulation, can warm yang, dispel cold, replenish qi to invigorate the spleen, cure indigestion, stimulate appetite and strengthen a digestive function, can also reduce swelling, resolve mass, activate blood, remove stasis, remove the necrotic tissues, promote granulation and repair injured glandular stomach tissues.In addition, the Chinese traditional medicine composition is free of toxic and side effects and is suitable for treatment of the proventriculitis of the chicken.