138results about How to "High practicability" patented technology

To provide a very-low-cost and short-TAT connection structure superior in connection reliability in accordance with a method for three-dimensionally connecting a plurality of semiconductor chips at a shortest wiring length by using a through-hole electrode in order to realize a compact, high-density, and high-function semiconductor system. The back of a semiconductor chip is decreased in thickness up to a predetermined thickness through back-grinding, a hole reaching a surface-layer electrode is formed at a back position corresponding to a device-side external electrode portion through dry etching, a metallic deposit is applied to the sidewall of the hole and the circumference of the back of the hole, a metallic bump (protruded electrode) of another semiconductor chip laminated on the upper side is deformation-injected into the through-hole by compression bonding, and the metallic bump is geometrically caulked and electrically connected to the inside of a through-hole formed in an LSI chip. It is possible to realize a unique connection structure having a high reliability in accordance with the caulking action using the plastic flow of a metallic bump in a very-low-cost short-TAT process and provide a three-dimensional inter-chip connection structure having a high practicability.

A health bed capable of adjusting the spine curve of a human body mainly comprises a plurality of elevators. Each of the elevators includes a lower plate having several upholders extending therefrom wherein a motor is fixed on the center of the lower plate and the axle of the motor is a screw engaged with the middle of a motor-driven base such that the motor-driven base can be moved upward or downward by a drive of the screw. The upholders support the motor-driven base is disposed above the lower plate and supported by upholders. A plurality of elastic objects is disposed on the motor-driven base in which the elastic object has a sense stick inside and the sense stick penetrates out of the bottom of the motor-driven base. A height sensor lateral the base may thus measure a downside movement of the elastic objects. The height sensor and the motor are connected to a control circuit that actuates the motors to drive the motor-driven bases upwardly to a desired height by receiving signals from the height sensors. When a user lies on the bed, each of the elevators actively sustains the spine curve of human body, achieving a comfortable sleep.

A method for calculating a primary time constant of a power grid. It comprises the steps of: establishing an electromechanical transient model of the power grid using the widely used power system analysis software package (PSASP) according to the actual power grid parameters and network topology; establishing an electromagnetic transient model under PASAP using the actual power grid parameters for a site which requires the calculation of the primary time constant of the power grid, and setting a ground short circuit fault at the site; obtaining a transient short circuit current of the short circuit point of the power grid using a hybrid simulation method of the electromechanical and electromagnetic transient models; filtering out a periodic component in the transient short circuit current to obtain a non-periodic component attenuated with time, and finding the attenuation time constant of the non-periodic component which is the primary time constant of the power grid.

A method of preventing an image sticking for a liquid crystal display includes alternately providing a high gray-level picture and a low gray-level picture between any two adjacent pictures, wherein the backlight is turned off. Or, in the turning-off process of the liquid crystal display, the high gray-level picture and low gray-level picture are provided alternately to the display panel. Therefore the ion densities of the pixels on the display panel are adjusted to the same or approximately the same to present a uniform image.

A suspension system for a vehicle, including (a) four displacement force generators (152) each configured to generate a displacement force forcing sprung and unsprung portions of the vehicle toward or away from each other; and (b) a control unit (200) configured to control the displacement force that is to be generated by each displacement force generator. The control unit is capable of executing a plurality of vibration damping controls concurrently with each other, by controlling the displacement force, so as to damp a composite vibration containing a plurality of different vehicle-body vibrations which are to be damped by the respective vibration damping controls. The control unit is configured to refrain from executing at least one of the vibration damping controls for damping one of the vehicle-body vibrations that is not required to be damped, in a low vibration intensity situation in which intensities of sprung-portion resonance-frequency vibration components in respective four sprung portions of the vehicle are lower than a threshold intensity degree.

A display clip system and a timing clip control method thereof are provided. The clip system is connected to a gate driver circuit, and includes a timing controller and a clip module. According to a system input signal and it's frame rates, the timing controller generates an enable signal, a clip trigger signal, and a base working signal. The clip module adjusts the base working signal by using the enable signal and the clip trigger signal. Then, the base working signal carries a first clip voltage to output to the gate driver circuit. When the frame rate changes, the timing controller adjusts trigger points and trigger time lengths of the enable signal and the clip trigger signal, and the clip module adjusts the base working signal. Then, the base working signal carries a second clip voltage equal to the first clip voltage to output to the gate driver circuit.

A water-preserved-mining roof-contacted filling method for controlling fissure of overlying strata and surface subsidence. The method is suitable for controlling fissure of overlying strata and surface subsidence in water-preserved-mining of a mine. A sensor is mounted at the top of a goaf of a filling working face where water-preserved-mining is carried out, and a filling body that is filled is monitored through a stress display device so as to determine whether the goaf is roof-contacted or separated. When the filling body is separated after roof-contacted, the goaf is filled for the second time so as to be roof-contacted fully, so that the purpose of controlling fissure of overlying strata and surface subsidence can be achieved, and protective mining of water resources of the mine can be realized at last. The method is simple and targeted, and has strong operability and high efficiency.

A quantitative evaluation method for the reliability of a Markov model switch reluctance motor system. The method comprises: solving a probability matrix P′^T(t) of a switch reluctance motor system being in any survival state at any time t via a state conversion diagram of the switch reluctance motor system; calculating the sum of various elements of the probability matrix P′^T(t) of the survival state, so that a reliability function R(t) is obtained; and thus calculating the average working time of the switch reluctance motor system before failure, thereby realizing the quantitative evaluation of the switch reluctance motor system and satisfying the requirements for the reliability analysis of a switch reluctance motor drive system. This disclosure has a good engineering application value.

In order to appropriately set an operation range of a voltage controlled oscillator without excessively increasing a frequency at which delta-sigma modulation is performed, a fractional N-PLL circuit includes: a voltage controlled oscillator that is configured to set plural output frequency ranges; a frequency selection circuit that selects one output frequency range; a division circuit; and a division setting circuit that sets a division ratio of the division circuit. The division setting circuit performs, while the frequency selection circuit is searching for the plural output frequency ranges of the voltage controlled oscillator, the delta-sigma modulation at a frequency lower than a frequency after the frequency selection circuit terminates the search.

A method for combining integrated drilling, flushing and slotting with thermal injection to enhance coalbed gas extraction, applicable to managing gas extraction from microporous, low-permeability, high-adsorption coalbed areas. A gas extraction borehole is drilled within a certain distance of a predetermined drilling, flushing and slotting borehole, and, once sealed, is used for gas extraction. An integrated drilling, flushing and slotting drill bit is used to sink the borehole, which is then sealed. Concentration variation in the gas extraction borehole is monitored in real time, and when concentration is below 30%, borehole is opened and high-temperature steam is injected by means of a steam generator, after which the borehole is again closed. Drilling a drilling, flushing and slotting borehole increases pressure relief space and the surface of exposed coal, relieves stress on the coal body, and increases gas permeability of the coalbed, while the injection of high-temperature steam promotes gas desorption in the coal body, promotes crack propagation around the borehole, and increases channels for gas flow, thus achieving highly efficient extraction of gas from the coalbed.

A method for controlling a subsidence area caused by underground mining in an adjoining open-pit mine, applied in an open-pit and underground coordinated mining process. In the method, a ground subsidence area caused by underground mining and production is directly filled and covered with overburden materials such as soil and rock discharged from an adjoining open-pit mine; small and medium fracture zones and large fracture zones caused by mining are timely backfilled, tamped, and levelled according to areas before the ground subsidence area appears, the thickness of the levelled soil layer is kept above 1 m, and the area slope is controlled within 7°. By fully using overburden materials from an adjoining open-pit mine, the method controls a subsidence area caused by underground mining and greatly shortens the discharge distance of the overburden materials from the adjoining open-pit mine, also solves the safety problems such as air leakage and spontaneous combustion of coal caused by fractures in mine subsidence, and brings significant economic and social benefits.

A device for detecting blockage of an air filter mesh, including: an air inlet, an air outlet, an air duct, a fan or a wind wheel, a blower motor, an air filter mesh, and a controller. The controller includes a main control board including: a microprocessor, an inverter circuit, and a motor operation parameter detecting circuit. The air filter mesh is disposed in the air duct. The motor operation parameter detecting circuit inputs a real time operation parameter into the microprocessor, and the output terminal of the microprocessor controls the inverter circuit. A function module of the microprocessor calculates a detected air volume according to the real time operation parameter. When the detected air volume is smaller than a preset air volume, the microprocessor determines that the air filter mesh is obstructed and outputs a signal to an alarm circuit to trigger an alarm.

A method for combining integrated drilling and slotting with oscillating thermal injection to enhance coalbed gas extraction, applicable to managing gas extraction from microporous, low-permeability, high-adsorption coal seam areas. A number of slots are formed within a thermal injection/extraction borehole by means of integrated drilling and slotting technology; a steam generator, is then used to three high-pressure, cyclically temperature-changing steam into said borehole; the steam passing through a spinning, oscillating-pulse jet nozzle forms an oscillating superheated steam, heating the coal body. The present method overcomes the limitations of simple permeability-increasing techniques, the slotting by means of hydraulic. pressure significantly increasing the pressure relief range of a single borehole and forming a fracture network that provides channels for passage of the superheated steam, while oscillating variation in steam temperature and pressure also promote crack propagation and perforation of the coal body; the combined effect of the two enhances the efficiency of gas desorption and extraction.

Techniques are provided which can isolate pluripotent stem cells at high purity capable of differentiation into at least a myocardial cell to regenerate the cardiac muscle. The pluripotent stem cells at high purity capable of differentiation into at least a myocardial cell to regenerate the cardiac muscle can be isolated through the following steps: (i) collecting a skeletal muscle tissue from a mammal and enzymatically treating the obtained skeletal muscle tissue to prepare a skeletal muscle tissue-derived cell; (ii) culturing the obtained skeletal muscle tissue-derived cell in a culture medium containing an epidermal growth factor and a fibroblast growth factor; (iii) selecting and separating a colony that is floating in the culture medium.

A position sensorless step-wise freewheeling control method for a switched reluctance motor having dual switched-mode power converters for each phase doesn't require any additional external hardware, any rotor-position sensor, or storage of flux linkage data of the motor. After the upper and lower tubes of the main switch are switched off, and the phase of the switched reluctance motor enters into a negative voltage forced freewheeling state, the phase current is detected. When the phase current falls to a preset threshold, one of the upper or lower tubes is switched on and the phase enters into a zero voltage natural freewheeling state. When the phase current reaches a peak value, the rotor position becomes the start position of the minimum phase inductance and the rotor position is used as the switch-on position of the main switch. The upper and lower tubes are then switched on.

A transportation main roadway and stope branch roadways are arranged by adopting a wangeviry coal mining method. A plurality of stope branch roadways are divided into multiple mining stages, based on which the stope branch roadways are skip-mined; and coal pillars are not reserved among the stope branch roadways. The transportation main roadway is a main transportation channel, and the stope branch roadways are coal mining roadways. All the stope branch roadways are sequentially stoped in a skip-mining manner according to the designed mining sequence and are sequentially and timely filled. The coal never stoped or the filled stope branch roadways is/are used as supports for controlling roofs at the two sides of the stope branch roadways, and the stope branch roadways are sequentially stoped according to a plurality of mining stages, and finally the coal pillar-free mining is realized.