71results about How to "Work performance impact" patented technology

The invention discloses a modified metakaolin-based permeation-resistant and crack-resistant agent for concrete. The modified metakaolin-based permeation-resistant and crack-resistant agent for concrete comprises: by mass, 10 to 75% of modified metakaolin, 5 to 40% of fine limestone powder, 4 to 40% of superfine coal ash, 1 to 20% of calcined hydrotalcite, 2 to 40% of fine quartz sand and 0.2 to 20% of solid silane powder. A preparation method of the modified metakaolin comprises the following steps of putting dry and washed kaolin into a bowl mill, carrying out grinding to obtain kaolin powder, carrying out calcination of the kaolin powder at a temperature of 500 to 1000 DEG C for 0.5 to 6.0 hours to obtain metakaolin, putting the metakaolin into a dispersion machine, adding an organic modifier of sulfamate or triethanolamine into the metakaolin, wherein a mass ratio of the metakaolin and the organic modifier is in a range of (5000: 1) to (100: 1), and carrying out dispersion to obtain the modified metakaolin having a contact angle of 50 to 100 degrees and a specific surface area of 8000 to 15000m<2>/kg. The modified metakaolin-based permeation-resistant and crack-resistant agentfor concrete can be utilized as a concrete additive, improves strength of concrete at different ages, does not produce obvious influences on concrete work performances, obviously improves anti-chloride ion penetration capability of concrete, reduces total shrinkage of concrete and improves crack resistance of concrete.

The invention discloses a cooking appliance control method, apparatus and system, storage medium, and processor. The method includes: acquiring an infrared image inside a cooking appliance; analyzingthe infrared image by using a first model to obtain a corresponding cooking scheme, wherein the first model is trained through machine learning using multiple groups of data, and each group of data includes the infrared image and a label for the corresponding cooking scheme; controlling the cooking appliance to perform cooking operations according to the cooking scheme. The cooking appliance control method, apparatus and system, storage medium, and processor solve the technical problem that the difference between the structure and the thermistor of the existing cooking appliance controlled bythe thermistor has a great influence on the working performance.

The invention relates to a squeeze head used for a rock conventional triaxial test acoustic emission test and belongs to the technical field of geotechnical engineering. The squeeze head comprises an upper squeeze head and a lower squeeze head, wherein the upper squeeze head and the lower squeeze head are arranged on a rock message delivery system (MTS) conventional triaxial compression test machine. Round grooves are formed in the lower end face of the upper squeeze head and the upper end face of the lower squeeze head. Two perpendicular installation holes are symmetrically formed in the bottom of each round groove. Perpendicular conductor holes are formed in bottoms of the installation holes. Horizontal conductor holes are formed in side walls of the upper squeeze head and the lower squeeze head, and the perpendicular conductor holes are communicated with the horizontal conductor holes. Springs are arranged at the bottoms of the installation holes. Cover plates are arranged on the round grooves and shapes and sizes of the cover plates are identical to shapes and sizes of the round grooves. By means of the squeeze head used for the rock conventional triaxial acoustic emission test, attenuation and distortion of emission signals can be reduced to the maximum extent, the situation that an acoustic emission sensor is immersed in hydraulic oil is avoided, the acoustic emission test of high confining pressure can be carried out and the facture surface of rock can be positioned.

The invention relates to application of a modified water-absorbing resin as a concrete antifreezing reinforcing material. The modified water-absorbing resin is spherical particles prepared by a reversed phase suspension copolymerization method in a 30-50-DEG C water bath from the following components in percentage by weight: 0.3-0.5% of N-N'-methylene-bis acrylamide used as a crosslinking agent, 0.6-0.8% of persulfate used as an initiator, 80-90% of acrylic acid monomer and 10-20% of acrylamide; and petroleum ether is used as a disperse phase. The modified water-absorbing resin has the following characteristics: the particles are fine, the particle size does not exceed 120 mu m, the liquid absorption rate and liquid absorption capacity are very stable in different media, the maximum liquid absorption capacity does not exceed 25 times of the self weight, the diameter of micropores generated in hardened concrete is 2-3 times of that of the original particles, and the influence by Ca<2+> concentration and pH value is greatly lowered. The modified water-absorbing resin spherical particles are doped into the concrete in a dry doping mode, so that the workability of the concrete can be maintained, and the compression strength and especially freezing resistance are obviously improved.

The invention discloses a movable radiation heat exchange device. The movable radiation heat exchange device comprises a compressor (1), a first heat exchanger (2) and a second heat exchanger (3) which are sequentially connected and located on the same space, and further comprises an energy storage device (4) corresponding to the first heat exchanger (2) and carrying out heat exchange with the first heat exchanger (2). According to the movable radiation heat exchange device, the problem that in the prior art, the effect becomes poorer and poorer when a movable air conditioner conducts refrigeration or heating for a long time can be solved.

The invention relates to a heat radiation system of a server. The heat radiation system comprises a cooling device, a heat radiating groove for accommodating a refrigerant, a heating element and a heat exchanger. The heating element arranged in the heat radiating groove is immersed by the refrigerant and is used for transforming the refrigerant into refrigerant steam; and the heat exchanger is used for obtaining the refrigerant steam in the heat radiating groove. Moreover, the heat exchanger obtains the refrigerant steam, carries out heat exchanging on thermal fluid generated by the refrigerant steam and the cooling device, and carries out natural cooling, so that the refrigerant steam is condensed into cold fluid and the cold fluid returns to the heat radiating groove. With the heat radiation system, working performances of all assemblies can be protected from being affected by the temperature; and the internal space of the heat radiating groove can be saved.

The invention provides a bluetooth and WiFi coexistence method and device for a terminal device. The method comprises: channels are distributed to WiFi and bluetooth in a time-division multiplexing manner and thus the channels include WiFi time slices, monitoring time slices and bluetooth time slices, wherein the monitoring time slices are behind the WiFi time slices and the WiFi time slices and the monitoring time slices are distributed to the WiFi and the bluetooth time slices are distributed to the bluetooth; and within the monitoring time slices, only a protection frame is sent to a wireless access point coupled to a terminal device by the WiFi and missing packet data sent by the wireless access point are received. Therefore, receiving of the missing packet data sent by the wireless access point can be realized after completion of the working hours of the WiFi, so that the influence on the WiFi working performance by the missing packet data can be eliminated and thus the coexistence performance of the bluetooth and WiFi can be improved.

The invention discloses a series-connection current limiting circuit of a miner lamp intrinsic safety power supply. The series-connection current limiting circuit of the miner lamp intrinsic safety power supply is characterized by comprising a DC/DC (Direct Current/ Direct Current) boosted circuit, a control circuit, a reference power supply, a current sampling circuit, a voltage sampling circuit and a three-stage series-connection power adjusting and protecting circuit, wherein the DC/DC boosted circuit is formed by an IC1 (Integrated Circuit), diodes, capacitors and a resistor and is used for supplying a control power supply; the control circuit is formed by an IC2 and resistors and used for setting and comparing the voltage and the current; the reference power supply is formed by an IC3, a resistor and a capacitor and is used for supplying the preset control voltage for a '+' input end of the IC2; the current sampling circuit is formed by a resistor R1 and a resistor R2, and the voltage sampling circuit is formed by a resistor R12 and a resistor R13, and the current sampling circuit and the voltage sampling circuit are respectively used for supplying the preset control voltage for a '-' input end of the IC2; and the three-stage series-connection power adjusting and protecting circuit is formed by an FET2 (Field Effect Transistor), an FET3 and an FET4. According to the series-connection current limiting circuit of the miner lamp intrinsic safety power supply, disclosed by the invention, the current limiting circuit is formed by applying power semiconductor devices and other electronic devices, and the situations that when in normal work, the inner resistances of the devices are kept to the lowest, and no influence on the working performance of loads is realized; and the inner resistances of the devices can be increased immediately when the loads are in over current or short circuit failure, the failure current can be immediately limited within the safety current, and thus the miner lamp power supply can be safely protected.

The invention provides an air conditioner which comprises a housing (1); the housing (1) comprises an air inlet (2)and an air outlet (3); an air intake baffle (4) is arranged at the air inlet (2); a panel (18) is arranged on the front side of the housing (1); and the air intake baffle (4) is in driving connection with the housing (1) through a first driving mechanism, and moves vertically under the driving action of the first driving mechanism to open or close the air inlet (2). According to the air conditioner, sundries in the external environment can be prevented from entering the air conditioner from the air inlet, and use experience of a user is improved.

The invention provides a fingerprint identification chip packaging structure and a packaging method. The packaging method comprises the steps that a substrate is provided; an induction chip is coupled at the surface of the substrate, the induction chip is provided with a first surface and a second surface which is opposite to the first surface, the first surface of the induction chip comprises induction areas, and the second surface of the induction chip is arranged at the surface of the substrate; and a plastic packaging layer is formed at the surfaces of the substrate and the partial induction chip, and the plastic packaging layer is exposed out of the induction areas. Sensitivity of the packaging structure of a fingerprint identification chip is enhanced, the packaging technology is simplified and manufacturing cost is reduced.

The invention provides a method for realizing a dual protocol-based VPN, which is based on a code, an integrated circuit board of an industrial computer, a chip and network technique. The design concept of a special operation system of a microkernel is used for establishing an encryption system with a plurality of key systems; the method of pre-sharing the key is adopted to share the key secretly under the protection of encryption algorithm; each IP data packet has a key to establish standard encryption channel of IPSec and select an IP level (a third level) to establish a special encryption channel; the encryption channels are used for managing all the remote VPN gateways, establishing the function of auditing and logging and integrating the main safety function modules such as encryption algorithm, key management, a VPN standard protocol, a VPN special protocol, management tools and the function of auditing and logging into a whole; at the same time, the self-destruction function of a VPN functional module driven by a hardware is realized; thereby, a virtual special network based on the dual protocol is established.

The invention provides a battery accommodating device of a new energy automobile. The battery accommodating device comprises a mounting plate; the upper end surface of the mounting plate is connected with a battery box body through a plurality of double-slider mechanisms; the battery box body is used for accommodating a vehicle-mounted battery; each double-slider mechanism comprises a first slider, a second slider and a connecting rod, wherein the first slider is slidably connected to one end of the bottom end surface of the battery box, and the second slider is slidably connected to one end, close to the first slider, of the mounting plate; the end, close to the first sliders, of the mounting plate is fixedly connected with first baffles; first springs are connected between the first baffles and the second sliders; a buffer mechanism is arranged in the middle of the mounting plate; second springs are connected between the end part of the vehicle-mounted battery in the length direction and the battery box body through connecting blocks; rubber is arranged between the connecting blocks and the end part of the vehicle-mounted battery in the length direction; and the connecting blocks are fixedly connected with the end part of the vehicle-mounted battery in the length direction. Vibration in the up-down and left-right directions of the vehicle-mounted battery can be effectively buffered, and the use performance of the battery is not affected even if a vehicle bumps.

The invention relates to an anti-crack fiber for water reducing type concrete and mortar. A preparation method comprises the following steps of: selecting horse chestnutn timber, extracting high-strength high-elastic modulus cellulose fiber thereof through biological fiber extraction technology, and coating a chemical alkali-resistant coating layer on the surface of the extracted cellulose fiber; and adding a water reducing agent to the cellulose fiber coated with the chemical alkali-resistant coating layer to prepare the anti-crack fiber for the water reducing type concrete and mortar. The fiber has natural hydrophilism and a hollow cavity structure; and the hollow cavity structure can store part of free water in the early hydration stage, does not influence the working performance of the concrete, the mortar and other cement-based composite materials, and can improve the working performance of the concrete, the mortar and other cement-based composite materials.

The invention relates to an electronic expansion valve and belongs to the technical field of refrigeration control. The electronic expansion valve comprises a driving device controlled by a sensing signal, a transmission device, a valve body (3) with a first channel (31) and a second channel (32), a throttle sleeve body (1), a valve core (2), wherein the throttle sleeve body (1) is fixed on the valve body (3) and is provided with a throttle opening (11), the valve core (2) can slide relatively to the throttle sleeve body (1) under the driving the driving device so as to control the size of the throttle opening, and the throttle opening (11) is a circumferential direction opening hole which is formed in the throttle sleeve body (1). The electronic expansion valve is characterized by further comprising a corrugated pipe (8) which can form a valve cavity with the throttle sleeve body (1), wherein the valve core (2) is arranged in the valve cavity and is provided with a pressure balance through hole (24). The electronic expansion valve disclosed by the invention is suitable for bothway circulation of commercial air conditioners with large capacity, and can avoid the influence (caused by over-large fluid pressure and over-large fluid fluctuation) on the operation performances of the electronic expansion valve.

The invention provides a control circuit which comprises a diode, a resistor R, a capacitor C, an NMOS transistor, a PNP triode and a circuit voltage pin Vcc. A positive electrode of the diode is connected to an MIC pin of an audio interface and the diode is in a switch-on state when the positive electrode of the diode receives voltage output by the MIC pin. The NMOS transistor is used for enabling a source electrode S of the NMOS transistor to be connected with a drain electrode D of the NMOS transistor when voltage output by the first end of the capacitor is received. The PNP triode is used for enabling an emitting electrode E of the PNP triode to be connected with a collector electrode C of the PNP triode when the PNP triode receives voltage output by the drain electrode D of the NMOS transistor; the circuit voltage pin Vcc is connected to a power source pin VBAT when the emitting electrode E of the PNP triode is connected with the collector electrode C of the PNP triode. According to the control circuit, an electronic device can control an electronic device power source to be switched on and switched off through detection of the voltage input by the MIC pin, power sources are saved, the control circuit can further store electric power of the MIC pin, the power source of the electronic device can be stably controlled, and influence on the electronic device operation performance by shaking of the power source is prevented.

The invention discloses an air conditioner control method. The air conditioner control method is characterized in that at least one counter-rotating fan set is arranged at an air outlet of an indoor unit of an air conditioner, wherein each counter-rotating fan set comprises a first fan and a second fan rotating counter to the first fan. The air conditioner control method includes the following steps: when a start instruction for the first fan is received, a target rotating speed of the first fan and the current rotating speed of the second fan are acquired; when the current rotating speed of the second fan is greater than a preset threshold value, the current rotating speed of the second fan is reduced; and after the current rotating speed of the second fan is reduced, the rotating speed of the first fan is adjusted to the target rotating speed. The invention further discloses an air conditioner control device, the air conditioner and a computer-readable storage medium. The effective start of the first fan is achieved, the air supply distance of the air conditioner is adjusted normally, and the first fan is prevented from start failure, which can influence the working performance of the air conditioner.

The invention discloses a switching mode power supply input voltage range expansion circuit and a design method of the expansion circuit. The expansion circuit comprises a first voltage expansion circuit connected between a direct current voltage input circuit and a switching mode power supply chip. The direct current voltage input circuit is an alternating current and direct current converting circuit or a direct current voltage source. The switching mode power supply chip is provided with the overvoltage and undervoltage protection end. The positive pole voltage output end of the first voltage expansion circuit is connected with the overvoltage and undervoltage protection end of the switching mode power supply chip. The negative pole voltage output end of the first voltage expansion circuit is connected with the grounded end of the switching mode power supply chip. The invention further discloses the design method of the switching mode power supply input voltage range expansion circuit. According to the expansion circuit and the design method, implementation is convenient, cost is low, the adaptability of a switching mode power supply to a power grid can be improved, the application range of the switching mode power supply is widened, the work reliability of the switching mode power supply can be effectively improved, practicality is high, and application and popularization are convenient.

The invention discloses an optical device, and relates to the technical field of optical devices. The optical device is used for reducing the heating power consumption when a heating electrode heats an optical waveguide so as to improve the working performance of the optical device. The optical device comprises a substrate, the optical waveguide and the heating electrode, wherein the optical waveguide and the heating electrode are formed in the substrate; the optical waveguide is a snake-shaped optical waveguide and comprises a plurality of first waveguide parts and at least one second waveguide part; the plurality of first waveguide parts are distributed in the substrate along the width direction of the optical waveguide; every two adjacent first waveguide parts are connected through the corresponding second waveguide part; the heating electrode is located above the multiple first waveguide parts, the length of the heating electrode is smaller than or equal to the maximum length of the multiple first waveguide parts, and the heating electrode is used for heating the multiple first waveguide parts.

The invention discloses metallized film capacitor encapsulation wax which is prepared from the following components: modified petroleum wax, nano-zinc oxide, polytrifluorochloroethylene, polyvinyl alcohol, coconut oil monoethanolamide, rosin, methylcellulose, mica powder and medical stone powder. The encapsulation wax is excellent in electrical property, high in moisture resistance, flowability, heat resistance and cold resistance, and good in usability, and can guarantee the stability of the electrical property of a metallized film capacitor.

The invention discloses an Internet of Vehicles position information encryption cloud platform, terminal, system and method. The method comprises the following steps: receiving a key acquisition request sent by a terminal; verifying the validity of the request, and verifying the identity of the terminal; if both the validity of the request and the identity verification of the terminal are passed,extracting a pre-generated and pre-stored key from a database according to the key acquisition request; the extracted secret key is encrypted; and the encrypted key is sent to the terminal. Accordingto the invention, the cloud platform can safely generate the symmetric key and store the symmetric key; the cloud platform performs identity authentication on the terminal, and only the legal terminalcan acquire the encryption key from the cloud platform; the symmetric key generated by the cloud platform has a life cycle and can be updated regularly; in the secret key distribution process, the safety of the secret key is ensured in an encryption mode; the key distribution process has the characteristics of high performance and high availability, and the influence of centralized application ofthe terminals on the working performance of the cloud platform is avoided.