39results about How to "Small performance degradation" patented technology

Disclosed is a control method of the refrigerant flow of an air conditioner system. The method comprises the steps that in the refrigerating mode, the opening degree of a first expansion valve is adjusted according to the initial opening degree of the first expansion valve and the intermediate pressure achievement degree of a compressor, and the opening degree of a second expansion valve is adjusted according to the initial opening degree of the second expansion valve and the air suction superheat degree; and in the heating mode, the opening degree of the second expansion valve is adjusted according to the initial opening degree of the second expansion valve, the external environment temperature and the intermediate pressure achievement degree of the compressor, and the opening degree of the first expansion valve is adjusted according to the initial opening degree of the first expansion valve and the air suction superheat degree. By the adoption of the technical scheme, accurate control over the refrigerant flow is achieved, the air conditioner system can still have relatively high performance under the working conditions of refrigeration at the high temperature and heating at the low temperature, and performance deterioration caused by environmental temperature changes is reduced.

The invention relates to the technical field of energy-saving scheduling for an air conditioning system, in particular to an energy-saving operation optimization scheduling method for the air conditioning system, which comprises the following steps of: constructing of a total objective function for calculating the minimum total energy consumption; inputting the predicted load Q (i) i ( / i) to be allocated, sequencing the devices according to the priority order of the peak price in the schedule to judge whether the predicted load Q (i) i ( / i) is higher than the minimum starting load of the system and whether the predicted load Q (i) i ( / i) is higher than the minimum output load of the unit; judging whether the air conditioning system is a cold supply mode or a heat supply mode; respectivelyentering a water pump frequency conversion module and a cooling tower module for frequency modulation calculation according to the calculated data; setting a constraint condition of the temperature ofthe inlet and outlet water to judge whether the temperature of the inlet and outlet water meets the constraint condition; calculating the energy consumption of each device. The method comprises respectively calculating the power consumption of equipment such as a water chilling unit, a water pump, a cooling tower, a boiler and the like to arrange the equipment in a large-small sequence, screeningby taking the minimum total power consumption of an air conditioning system as a target to obtain the minimum power consumption, and outputting a corresponding equipment optimization operation strategy.

The invention discloses a high-strength and high-toughness nylon composite material used for railway fasteners. The nylon composite material comprises, by weight, 30-70% of matrix resin, 10-60% of reinforced fibers, 0-20% of inorganic minerals, 1-30% of a hydrolysis resisting agent and 0.1-5% of a processing assistant. A preparation method of the nylon composite material comprises the following steps: placing all above raw materials in a double screw extruder, shearing and blending the above obtained mixture through the double screw extruder, extruding the mixture through a head, drawing the extruded mixture to form strips, air-cooling the strips, cutting the air-cooled strips to form granules, and drying the granules to obtain the nylon composite material. The railway fasteners produced from the high-strength and high-toughness nylon composite material have weak performance attention in high-temperature and high-humidity environment, and meets use requirements of the railway fasteners in the high-temperature and high-humidity environment.

The invention discloses an anti-saturation frequency adaptive resonance control method for an active power filter. The method comprises the steps that the three-phase voltage of a common coupling point is acquired, and the voltage frequency fpll and the phase theta are acquired by using a phase-locked loop; a harmonic detection module extracts the harmonic signal command of nolinear load current iL; the harmonic signal command is added with an output active current command acquired through a direct current voltage controller, and then is subtracted from the sum of an output current feedback signal and a compensator output signal to acquire the input error signal of a current controller; the current controller composed of a resonant controller and a PI controller is used to acquire the output control amount; and finally, after the output control amount, the voltage feedforward amount of the common coupling point, and the filter capacitor current feedforward amount through an active damping module are added together, a PWM wave modulation command signal is acquired through a limiter.

The invention discloses a power generating method adopting an ionic thermal motion principle. The power generating method comprises the following steps of: firstly, transferring graphene to a substrate and bonding a graphene film on the substrate; secondly, depositing a conducting material with a work function higher than that of the graphene at one end of the graphene film to obtain a first electrode and depositing a conducting material with a work function lower than that of the graphene at the other end of the graphene film to obtain a second electrode; thirdly, leading out the first electrode and the second electrode at two ends of the graphene film by using two metal wires; and fourthly, holding an ionic salt solution in a container casing, integrally immersing the substrate, the graphene film, the first electrode, the second electrode and the two metal wires in the ionic salt solution and leading the metal wires to the outside of the container casing. The invention also provides a graphene battery manufactured by using the power generating method. The power generating method adopting the ionic thermal motion principle and the graphene battery manufactured by the power generation method have the advantages of safety, reliability, no need of using power for charging, long service life of the graphene battery and no harm to a human body and environment.

Computerized methods, systems, and computer-storage media for establishing and managing a transmission control protocol (TCP)-based tunnel ("tunnel") are provided. The tunnel spans between a data center and a private enterprise network and connects endpoints, of a service application, that reside in each location. During communication, the endpoints transmit data packets over one or more channels (e.g., higher-level channel and lower-level channel) that comprise the tunnel. Each of the channels supports reliability mechanisms (e.g., congestion-control mechanism and loss-recovery mechanism) integrally running thereon, for ensuring complete data-packet delivery. To prevent unwarranted performance degradation caused by duplicative efforts of reliability mechanisms, a fabric controller is employed to selectively disable one or more of the reliability mechanisms individually. The selective disablement of the reliability mechanisms is invoked by predefined criteria, such as instructions from a service model or detected identity of a source / destination endpoint, and is invoked on a per network connection basis.

The invention relates to noncausal effective learning control system and method, and belongs to the technical field of control over precision motion control systems, and the system and the method are used for solving the problem that the working efficiency of the system is low due to the long dynamic regulation time of the precision motion control system. The control system comprises a control object P, a noncausal learning control law module, an effective learning function f (t, e) module, a memorizer M and a feedback control law C module, wherein the noncausal learning control law module is composed of a time delay factor zd module, a causal learning law L module and a filter Q. The control method comprises the following steps of: carrying out preliminary shaping on the learning control system by adopting the time delay factor, confirming d according to the bandwidth of a feedback system composed of P and C and then confirming the low band range meeting the convergence requirements; and shaping the high band parts through the causal learning law L module and the filter Q to enable the high band parts to meet the convergence requirements. The control system and the control method which are disclosed by the invention are suitable for the control over the precision motion control system.

The invention relates to a marine composite superstructure bulkhead, which comprises a protective sandwich structure and a reinforcing structure. The protective sandwich structure comprises a lower-layer skin, an ultra-high molecular weight polyethylene armor plate, a PVC foam layer and an upper-layer skin, which are sequentially arranged from bottom to top, and all layers are bonded into a wholethrough an adhesive. The reinforcing structure comprises a bottom glass fiber reinforced plastic layer, a surface glass fiber reinforced plastic layer, PVC foam reinforced ribs and a glass fiber reinforced skin. The bottom glass fiber reinforced plastic layer is laid on the outer surface of the lower-layer skin of the protective sandwich structure; the surface glass fiber reinforced plastic layeris laid on the outer surface of the upper-layer skin, the PVC foam reinforced ribs are installed on the outer surface of the surface glass fiber reinforced plastic layer, and the glass fiber reinforced skin wraps the surfaces of the PVC foam reinforced ribs. The protective sandwich structure and the reinforcing structure are formed by adopting a vacuum flow guide integrated forming process. The marine composite superstructure bulkhead can meet the requirement on the impact load of splashed water spray, penetration of cubic fragments with a speed of 100-1500 m / s and a mass of 1-20 g can be defended, and the electromagnetic stealth performance is: the reflectivity within a range of 2-8 GHz is lower than -10 dB, and the reflectivity within the range of 8-18 GHz is lower than -18 dB.

The invention provides a graphene modified high-density polyethylene composite material for a carrier roller. The composite material is prepared from the following components in parts by weight: 40 to 60 parts of mixed high-density polyethylene, 0.5 part of graphene, 20 to 40 parts of alkali-free glass fiber, 3 to 10 parts of wear-resistant agent, 5 to 20 parts of talcum powder, 3 to 5 parts of adhesive, 2 to 5 parts of grafting agent, 0.1 to 0.5 part of antioxidant, 0.1 to 0.5 part of ultraviolet screening agent, and 0.1 to 0.5 part of a silane coupling agent; wherein the total parts are 100. The invention also provides a preparation method of the material. Performance detection is carried out on the prepared high-density polyethylene composite material, and the basic requirements for manufacturing carrier roller products are met.

The invention discloses an active power-filter anti-saturation frequency adaptation repetition control method. The method comprises the following steps of firstly, collecting a three-phase voltage ofa common coupling point, and using a phase-locked loop to acquire a voltage frequency fpll and a phase theta; then, extracting a harmonic wave signal instruction of a nonlinear load current iL by a harmonic wave detection module, adding with an output active current instruction acquired through a direct voltage controller, and then subtracting a sum of an output current feedback signal and a compensator output signal and acquiring an input error signal of a current controller; and then, through the current controller formed by a repetition controller and a PI controller, acquiring an output control amount; and finally, outputting a PWM wave modulation instruction signal acquired after a sum of the output control amount, a common coupling point voltage feedforward amount and a filter capacitance current feedforward amount passing through an active damping module passes through an amplitude limiter.

The invention relates to the technical field of lithium batteries, in particular to a diaphragm for a lithium metal battery and a preparation method thereof. The diaphragm for the lithium metal battery comprises a diaphragm body, at least one surface of the diaphragm body is coated with a piezoelectric ceramic layer with piezoelectric property, the surface, coated with the piezoelectric ceramic layer, of the diaphragm body faces a negative electrode of the lithium metal battery, and the piezoelectric ceramic layer is formed by compounding a conductive agent, a binder and piezoelectric ceramic particles. According to the diaphragm for the lithium metal battery, lithium ions can be uniformly deposited in the reaction process, the surface area of uniformly-separated lithium is smaller than that of dendritic lithium, side reactions can be reduced, performance degradation of the lithium battery is slowed down, the uniformly-deposited lithium cannot pierce the diaphragm to cause short circuit, and the safety of the battery is improved.

The invention relates to an automobile sill beam aluminum alloy and a preparation method of the automobile sill beam aluminum alloy. The method comprises the following steps of (1) in the process of smelting molten aluminum, adding an aluminum-copper alloy, an aluminum-silicon alloy, magnesium ingot and a manganese agent, wherein the mass percentage of added elements in a final aluminum rod is asfollows: 0.90-1.10wt% of magnesium, 0.90-1.10wt% of silicon, 0.50-0.80wt% of manganese, and 0.20-0.40wt% of copper; (2) filtering an aluminum liquid; (3) performing continuous casting through a casting system to obtain an aluminum rod; (4) transferring the aluminum rod into a homogenizing furnace for homogenization under the temperature of 550-570 DEG C, performing heat preservation for 8-12 h, and carrying out air mist cooling; and (5) sawing the aluminum rod to obtain short rods for extrusion. By adjusting the magnesium-silicon ratio, the content of Cu is increased, the product performance is further improved, and meanwhile, it is ensured that the decay rate can be low during later-period baking, and the performance of the prepared aluminum alloy in different states can meet requirements.

The invention provides a high-strength epoxy structural adhesive for adhering carbon fiber composite materials. The high-strength epoxy structural adhesive consists of A component and B component; the A component comprises the following components in parts by weight: 40-60 parts of epoxy resin / polybutadiene rubber polymer, 40-60 parts of mixed type epoxy regin, 0.2-0.5 part of graphene, 5-10 parts of SBM / MAM copolymer, 6-10 parts of flexibilizer, 1-5 parts of attapulgite, 1-5 parts of gas-phase method silicon dioxide and 0.5-1.5 parts of coupling agent; and the B component comprises the following components in parts by weight: 85-95 parts of polyamide, 5-15 parts of flexible polyamide, 3-8 parts of ATBN reactive liquid polymer and 1-5 parts of gas-phase method silicon dioxide. The adopted epoxy structural adhesive in the technical scheme of the invention is high in adhesion strength when being used between the carbon fiber composite materials, and achieves the effect that adhered surface of the carbon fiber composite materials is destroyed.

The invention provides a recyclable packaging material. The recyclable packaging material comprises two or more layers of functional films with different functions and characteristics. A plurality ofbuffer supporting units with buffer and supporting functions are connected and combined together, and packages in various shapes are manufactured through the modes such as cutting, heat sealing, gluing, hot pressing, binding and folding, so that the requirement for protecting packaged objects in the transportation logistics process is met. The functional films and the buffer and supporting units are mainly made of high polymer materials which can be recycled for multiple times, and the packages made of the packaging material have better compression resistance, breakage resistance and moistureresistance and longer service life than a traditional corrugated paper package; and meanwhile, the packaging material can be recycled for multiple times, the cost can be remarkably reduced, the carbonemission and energy consumption in the production and manufacturing process can be greatly reduced, and a cheap and environment-friendly bag replacement scheme for an existing corrugated carton and various buffer filling materials is achieved.

The invention provides a negative electrode material and a preparation method and application thereof. The negative electrode material comprises an inner core, a first carbon coating layer coating the surface of the inner core and a second carbon coating layer located on the outermost layer, wherein the inner core is an amorphous lithium-silicon alloy, the chemical formula of the amorphous lithium-silicon alloy is LixSi, and x is more than 1 and less than or equal to 4.4. The surface of the lithium-silicon alloy is subjected to double-layer carbon coating, so that the performance of the lithium-silicon alloy core is hardly attenuated in dry air, and the negative electrode material has relatively good environmental stability and cycle stability.

The invention discloses a temperature swing adsorption gas purification system and a temperature swing adsorption gas purification process. The temperature swing adsorption gas purification system comprises a raw material gas inlet main pipe, an adsorption purification device, a product gas discharge main pipe, a regeneration heater, a regeneration vacuum pump and a regeneration liquid separationtank. The system operates according to the following mode: when the system is controlled to operate, the adsorbent regeneration mode is vacuum negative pressure regeneration; after the vacuum negativepressure regeneration operation is carried out for several months, the temperature-changing washing regeneration is switched once only when the control index of the device has a rising trend; carrying out vacuum negative-pressure regeneration for several months after the primary variable-temperature washing regeneration until the next variable-temperature washing regeneration; in such a way, thesystem performs cyclic regeneration operations. By adopting the cyclic regeneration mode, regenerated gas, steam consumption and circulating cooling water consumption required by constant-temperatureflushing regeneration can be saved; and the total investment of the device is greatly reduced.

The invention relates to a battery pack structure reconstruction device and method. The battery pack structure reconstruction device comprises a main control module, N single battery modules and N single batteries, wherein the main control module is connected with the N single battery modules through a communication bus; the battery connecting terminal of each single battery module is connected with the negative electrode and the positive electrode of one single battery separately; the main control module queries the usage amount of the N single battery modules through the communication bus separately; and a direct current power output system of the main control module outputs direct current which satisfies requirements through output terminals -and +. According to the battery pack reconstitution method disclosed by the invention, the structure is simpler, the battery modules which can be independently installed can be directly attached to the single storage batteries to form the intelligent battery units, and the intelligent battery units are further assembled into the intelligent battery pack; the equipment is convenient and feasible to install and maintain, the batteries of different types and specifications can be mixed and used in a series mode, and the battery pack reconstruction method is suitable for a high-electric-quantity battery pack management system.

The embodiment of the invention discloses a method for controlling refrigerant flow in an air conditioning system. The method includes: in cooling mode, adjusting the opening degree of the first expansion valve according to the initial opening degree of the first expansion valve and the attainment degree of the intermediate pressure of the compressor, and adjusting the opening degree of the second expansion valve according to the initial opening degree of the second expansion valve Adjust the opening degree of the second expansion valve according to the suction superheat degree; in the heating mode, adjust the second expansion valve according to the initial opening degree of the second expansion valve, the external environment temperature and the attainment degree of the intermediate pressure of the compressor the opening degree of the valve, and adjust the opening degree of the first expansion valve according to the initial opening degree of the first expansion valve and the suction superheat degree. Through the technical solutions provided by the embodiments of the present invention, the precise control of the refrigerant flow rate is realized, so that the air conditioning system still has high performance under the two working conditions of high-temperature cooling and low-temperature heating, and reduces performance attenuation caused by ambient temperature changes.

The invention relates to an aluminum alloy for an automobile door sill beam and a preparation method thereof. The method comprises the steps of: (1) adding an aluminum-copper alloy, an aluminum-silicon alloy, magnesium ingots and a manganese agent in the process of smelting molten aluminum; the final aluminum The mass percentage of the added elements in the rod meets: magnesium 0.90-1.10wt%, silicon 0.90-1.10%, manganese 0.50-0.80%, copper 0.20-0.40%; (2) filtering molten aluminum; (3) continuous casting through the casting system , casting aluminum rods; (4) Transfer the aluminum rods to a homogenizing furnace for homogenization, the conditions are 550-570 ° C, 8-12H heat preservation, wind and mist cooling; (5) sawing the aluminum rods to obtain extruded The short stick used. The present invention increases the content of Cu by adjusting the magnesium-silicon ratio, while further improving product performance, and at the same time ensures that the attenuation rate can be lower during post-baking, and the properties of the prepared aluminum alloy can meet the requirements in different states.

According to the cleaning device for the filter cloth of the filter press, the filter press comprises a plurality of filter plates and the filter cloth, a mounting frame is fixed to the lower ends ofthe filter plates, the filter cloth is arranged to move relative to the filter plates, and the cleaning device comprises two flattening positioning shafts which are mounted on the mounting frame in astaggered and parallel mode; the filter cloth on the two sides of the filter plate respectively bypasses the corresponding flattening positioning shafts and can move around the flattening positioningshafts; the cleaning water pipe is arranged below the two flattening positioning shafts, is mounted on the mounting frame and is parallel to the two flattening positioning shafts; the plurality of cleaning spray heads are uniformly arranged on the cleaning water pipe at intervals along the axial direction; the plurality of cleaning spray heads are sequentially and alternately aligned with the twoflattening positioning shafts respectively; wherein the two flattening positioning shafts are configured to enable the filter cloth to be kept centered and flattened in the moving process of the filter cloth, and cleaning liquid is sprayed to the area, surrounding the flattening positioning shafts, of the filter cloth through the cleaning spray heads, so that the filter cloth is cleaned.

The invention provides a charging method and charging device executed in a battery replacing facility, and a far-end server. According to one aspect of the invention, the charging method comprises thefollowing steps of: determining a charging mode for a battery according to the charging starting time and / or the number of batteries of which the state of charge is higher than or equal to a first threshold value in the battery replacing facility; and charging the battery by using the determined charging mode until the state of charge of the battery is increased to the first threshold value and then the to-be-charged battery is allowed to stand still without directly increasing the state of charge of the to-be-charged battery to a full state of charge. Therefore, the lithium ion battery system can be effectively prevented from being stored in a high-charge state, and the service life of the lithium ion battery system is prolonged.

The invention discloses a method for enhancing the operation stability of a fuel cell, which belongs to the technical field of fuel cells. The fuel cell can be operated alternately under different high and low currents. Compared with the traditional constant current operation mode, the loss of doping acid can be reduced under the premise that the power output capacity remains unchanged, which can effectively slow down the degradation of battery performance and significantly prolong the life of the fuel cell. operating life.

The invention relates to the technical field of automobiles, in particular to an automobile combined key. The keyboard comprises a character plate (1), keys (2), a sliding block (3), a shading plate (4), ejector pin (5) mechanisms, a lamp panel (8) and a rack part (9), wherein the keys (2) are connected to the sliding block (3) to form a key (2) combination, and the character plate (1), the shading plate (4) and the rack part (9) are fixed and form a sliding cavity; the ejector pin (5) mechanisms are arranged at two sides of the shading plate (4); inclined arc faces (10) allowing the ejector pin (5) mechanisms to abut against are arranged on the two sides of the sliding block (3), the lamp panel (8) is arranged on the rack part (9) and provided with a signal transmission switch (12), and atriggering part (11) used for triggering the signal transmission switch (12) is arranged on the lower portion of the sliding block (3). The automobile combined key can meet various force displacementcurve requirements, and is low in poor contact risk and good in durability.

The invention relates to noncausal effective learning control system and method, and belongs to the technical field of control over precision motion control systems, and the system and the method are used for solving the problem that the working efficiency of the system is low due to the long dynamic regulation time of the precision motion control system. The control system comprises a control object P, a noncausal learning control law module, an effective learning function f (t, e) module, a memorizer M and a feedback control law C module, wherein the noncausal learning control law module is composed of a time delay factor zd module, a causal learning law L module and a filter Q. The control method comprises the following steps of: carrying out preliminary shaping on the learning control system by adopting the time delay factor, confirming d according to the bandwidth of a feedback system composed of P and C and then confirming the low band range meeting the convergence requirements; and shaping the high band parts through the causal learning law L module and the filter Q to enable the high band parts to meet the convergence requirements. The control system and the control method which are disclosed by the invention are suitable for the control over the precision motion control system.

The invention relates to the technical field of lithium batteries, in particular to a separator for lithium metal batteries and a preparation method thereof. A diaphragm for lithium metal batteries, comprising a diaphragm body, at least one side of the diaphragm body is coated with a piezoelectric ceramic layer with piezoelectric properties, and the side of the diaphragm body coated with the piezoelectric ceramic layer faces the negative electrode of the lithium metal battery, The electroceramic layer is composed of conductive agent, binder and piezoelectric ceramic particles. A separator for a lithium metal battery of the present invention can enable uniform deposition of lithium ions during the reaction process, and the uniformly precipitated lithium has a smaller surface area than dendritic lithium, which can reduce side reactions and slow down the performance decay of lithium batteries. Moreover, the uniformly deposited lithium will not pierce the separator and cause a short circuit, which improves the safety of the battery.

The invention discloses a method for improving running stability of a fuel cell, and belongs to the technical field of fuel cells. The fuel cell alternatively runs under different high and low currents. Compared with a traditional constant-current running mode, the loss of a doping acid can be reduced on the premise that the power output capability is unchanged, the battery performance attenuationis effectively reduced, and the running lifetime of the fuel cell is remarkably prolonged.

The embodiment of the present invention discloses an organic light emitting diode, a display panel, and a display device. The organic light emitting diode includes: a first electrode, a second electrode, a light emitting layer, and at least one barrier layer; the first electrode is arranged opposite to the second electrode The light-emitting layer is located between the first electrode and the second electrode; the barrier layer is located between the light-emitting layer and the second electrode, and / or the barrier layer is located between the light-emitting layer and the first electrode; wherein, the same barrier layer includes At least two kinds of barrier materials, and the electron mobility of at least one barrier material is lower than a first preset value, the electron mobility of at least another barrier material is higher than a second preset value, and the first preset value is lower than Second default value. The technical solution provided by the embodiments of the present invention can control the injection amount of electrons and holes, thereby balancing the number of electrons and holes in the light-emitting layer, reducing the damage of excess electrons to the film layer material and interface, and improving the efficiency of organic light-emitting diodes. life.

The invention discloses an anti-saturation frequency self-adaptive resonance control method of an active power filter. Firstly, the three-phase voltage of a common coupling point is collected, and the voltage frequency f is obtained by using a phase-locked loop. pll and phase θ; then, the harmonic detection module extracts the nonlinear load current i L The harmonic signal instruction of the DC voltage controller is added to the output active current instruction, and then subtracted from the sum of the output current feedback signal and the output signal of the compensator to obtain the input error signal of the current controller; The current controller formed with the PI controller obtains the output control quantity; finally, the output control quantity, the voltage feedforward quantity of the common coupling point and the filter capacitor current feedforward quantity through the active damping module are added and then passed through the limiter Obtain the PWM wave modulation command signal.

The invention discloses a coated aluminum foil as well as a preparation method and application thereof. The coated aluminum foil provided by the invention comprises an aluminum foil base material and a functional coating, wherein the functional coating is arranged on at least one surface of the aluminum foil base material; the functional coating at least comprises a hydrophilic layer; the ratio of the single-side coating amount forming the hydrophilic layer to the single-side coating amount forming the functional coating is greater than or equal to 35%. The coating aluminum foil provided by the invention can prevent the performance of the hydrophilic coating from being reduced along with time consumption, so that the hydrophilic effect and the long-term effect of the hydrophilic performance of the coating aluminum foil are improved, and the dirt-removing power is improved.