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 discloses a capillary anti-blocking structural assembly of a low-temperature refrigerator and a controlling method for the assembly. The assembly comprises a compressor, an oil return pipe, an oil separator, a condensation fan, a condenser, a drying filter, an electric control board, a capillary and an evaporator. The assembly is characterized in that two ends of the capillary are connected with electric heaters or integrally covers the electric heaters; temperatures of the inlet and outlet parts of the capillary are controlled in an electric heating mode; according to the capillary oil blockage and ice blockage forming principle, for preventing the capillary from being blocked and preventing the working performance of a refrigerating system from being affected at the same time, the capillary part is generally heated in the running process of the refrigerating system and at the stop stage of the compressor; according to types of a refrigerant and lubricating oil adopted by the refrigerating system, the temperatures of the heated parts are controlled, so that blockage is prevented, and the working medium of the system is prevented from being deteriorated by excessive heating; and the refrigerating performance of the low-temperature refrigerator is prevented from being affected by excessive heating.

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 discloses a self-suction multiple-stage centrifugal pump with a variable-scale separation net. The self-suction multiple-stage centrifugal pump comprises the variable-scale annular separation net and an annular net frame. The variable-scale separation net and the net frame are closely attached together to be mounted between a centrifugal pump outlet and a backflow hole and are closeto the centrifugal pump outlet. The scales of grids, in the circumferential direction of the separation net, of the separation net change constantly. According to the specific change rule, smaller-scale and closer separation nets are distributed in areas high in bubble concentration and axial speed, bubble backflow is stopped, and bubble floating is accelerated; and larger-scale and sparser separation nets are distributed in areas small in bubble concentration and low in axial speed, backflow flowing resistance of the self-suction stage is reduced, and self-suction is accelerated. According tothe self-suction multiple-stage centrifugal pump, turbulent flow in a pump casing cavity at different rotating speeds is fully rectified, flowing uniformity is obviously enhanced after the flow passes through the variable-scale separation net, the fluid speed is reduced, and pressure is enhanced; and fluid kinetic energy can be converted into pressure potential energy better, and the pressure difference between an inlet cavity and an impeller inlet is increased.

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 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 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.

A broadband antenna is mounted aside a metal electronic element and includes a feeding portion, a first connecting portion, a second connecting portion, a coupling portion, and a ground portion. The first radiating portion and the second radiating portion are both connected perpendicular to the feeding portion. The coupling portion is spaced from the first radiating portion and the second connecting portion. The ground portion is connected perpendicular to a middle portion of the coupling portion and adjacent to the metal electronic element. These portions cooperatively use a low frequency mode and a high frequency mode. The ground portion increases an inductance performance of the broadband antenna, thereby decreasing interference caused by the metal electronic elements. A wireless communication device employing the broadband antenna is also disclosed.

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.

The invention discloses a manufacturing method for an anode film of a part of integrated circuit manufacturing equipment. The manufacturing method comprises the following steps of selecting a rectangular aluminum alloy plate as a substrate of an anode film; placing the substrate into an organic solution for surface washing; placing the substrate into a sodium hydroxide solution for alkaline washing; grinding the surface of the substrate; jetting the surface of the substrate to enable the surface roughness of the substrate to be smaller than 1mum; placing the substrate into an anode tank with a sulfuric acid solution with the concentration of 10%, introducing different currents to the sulfuric acid solution under the same voltage according to different stages, and carrying out anodic oxidation treatment on the substrate to form a film; and placing the anode film into 100-DEG C boiled water to carry out hole sealing treatment for 30-60min to obtain the anode film with the thickness of 50-60mum. The thinner anode film obtained by using the manufacturing method for the anode film, disclosed by the invention, achieves the high corrosion, voltage and wear resistance of a thick anode film, so that the aim of protecting the part is achieved.

The invention discloses a vehicle-mounted multimedia electronic system with a heat dissipation function, which comprises a circuit board, a heat dissipation component and electronic components. Wherein the electronic components comprise a digital logic component, a power supply component and a high heat consumption component, and the heat dissipation component is tightly coupled with the electronic components; the circuit board adopts an area division design, comprising a digital logic element partition, a power element partition, a high heat consumption element partition and a heat dissipation component area; the digital logic element partition is remote from the high heat consumption element partition, and the high heat consumption element partition and the heat dissipation component area are adjacent to each other. In addition, a corresponding auxiliary heat insulation device can be arranged at the periphery of the high heat consumption element partition. The invention adjusts the internal structure of the vehicle-mounted multimedia electronic system, and combined with the heat dissipation parts used together, the stability and reliability of the system operation are effectivelyimproved.

The invention belongs to the technical field of building materials, and specifically discloses a modification method of rubber particles and modified rubber concrete. The modification method of the rubber particles comprises the steps of soaking the rubber particles by using a NaOH solution with mass concentration of 18-23%, cleaning the rubber particles for 1-3 times by using water, diluting KH570 which is 1-1.3% of the rubber particles in aspect of mass fraction by using ethyl alcohol, fully moistening the rubber particles by using the KH570, and airing and sealing the rubber particles for later use. According to the method, the modified rubber particles are used for isopyknic replacing for 5-15% of sand so as to obtain the rubber concrete. Compared with the standard rubber concrete without any treatment, the rubber concrete treated through the method has higher compressive strength and split tensile strength, and no adverse effect is caused to the working performance of concrete mixtures.

The invention discloses a self-suction multiple-stage centrifugal pump with a variable-scale separation net. The self-suction multiple-stage centrifugal pump comprises the variable-scale annular separation net and an annular net frame. The variable-scale separation net and the net frame are closely attached together to be mounted between a centrifugal pump outlet and a backflow hole and are closeto the centrifugal pump outlet. The scales of grids, in the circumferential direction of the separation net, of the separation net change constantly. According to the specific change rule, smaller-scale and closer separation nets are distributed in areas high in bubble concentration and axial speed, bubble backflow is stopped, and bubble floating is accelerated; and larger-scale and sparser separation nets are distributed in areas small in bubble concentration and low in axial speed, backflow flowing resistance of the self-suction stage is reduced, and self-suction is accelerated. According tothe self-suction multiple-stage centrifugal pump, turbulent flow in a pump casing cavity at different rotating speeds is fully rectified, flowing uniformity is obviously enhanced after the flow passes through the variable-scale separation net, the fluid speed is reduced, and pressure is enhanced; and fluid kinetic energy can be converted into pressure potential energy better, and the pressure difference between an inlet cavity and an impeller inlet is increased.

The invention relates to a connector for online current detection and its active end, which belongs to the field of connector performance measurement. The connector includes an active end and a passive end. The active end has a built-in circuit board, and the circuit board has a current detection circuit , the current detection circuit has a current signal input terminal, and the active terminal has a built-in current sensor for detecting the current flowing through the signal contact piece of the active terminal. The current sensor is connected to the current signal input terminal. superior. The present invention detects the current of the signal contact piece of the active end through the magnetic collecting sheet sensor, and sends the current to the current signal input end of the current detection circuit, so as to realize the online detection of the working current of the connector, and through the integrated circuit board of the active end The integration of the current detection device inside the connector is realized with the magnetic collecting sheet sensor, and the volume of the integrated active end and the connector is relatively small, and no change is required to the external structure size of the existing plug and socket.