172results about How to "Avoid uncontrollable" patented technology

The invention relates to a preparation method of copper alloy materials, in particular to a preparation method of aged copper alloys with high strength and high electric conductivity. The aged copper alloys comprise copper chromium (Cu-Cr) alloy, copper zirconium (Cu-Zr) alloy and copper chromium zirconium (Cu-Cr-Zr) alloy, wherein the content of Cr is 0.1-0.6% and the content of Zr is 0.01-0.5%. The preparation method mainly comprises the following steps: according to the percentages by weight, casting by mixed smelting to obtain the Cu-Cr alloy, the Cu-Zr alloy and the Cu-Cr-Zr alloy; performing solution treatment on the cast ingots; performing equal channel deformation at room temperature on the copper alloys after solution treatment; then performing the machining processes such as extruding, drawing or rolling and the like on the Cu-Cr alloy, the Cu-Zr alloy and the Cu-Cr-Zr alloy after equal channel deformation; and finally performing aging treatment on the workpieces. The preparation method overcomes the defect of limited strengthening effect of single components, reduces the adverse effect of excessive elements on the electric conductivity, acquires ultra-fine grains under the conditions of not changing the shapes and sizes of samples, can be combined with the machining processes such as extruding, drawing or rolling and the like, can be used for producing a product with an expected shape, and fully plays the roles of fine grain strengthening and aging strengthening.

The invention provides a device and a method for testing high-temperature corrosion and erosion properties of an oil well pipe string. The device for testing the high-temperature corrosion and erosion properties of the oil well pipe string comprises a high-pressure kettle, a screw feeder, a water pump, a mixer and a nozzle, wherein the high-pressure kettle is provided with a sand outlet and a liquid outlet; the inlet end of the screw feeder is connected with the sand outlet of the high-pressure kettle; the inlet end of the water pump is connected with the liquid outlet of the high-pressure kettle through a grain filter device; the mixer is connected with the outlet end of the screw feeder and the outlet end of the water pump, and the outlet end of the water pump is provided with a flowmeter; and the nozzle is connected with the mixer and extends into the high-pressure kettle. The method comprises the following steps of: filtering heated test sand grains from a heated test fluid, and then, delivering the heated test fluid from the high-pressure kettle to the water pump. By using the device and the method, the grain erosion speed, the grain flow and the erosion angle can be independently controlled, so that the test result is more accurate and purposeful.

The invention provides a preparation method of high-softening-point asphalt, which comprises the following steps: introducing modified asphalt into a single container, and introducing inert gas into the single container, wherein the single container is sequentially provided with at least three independent heating zones from top to bottom, an independent heater is arranged in each heating zone, the heating temperatures gradually increase, and the reaction pressure is 0.03-0.05 MPa; and after heating the modified asphalt to the target temperature, keeping the temperature for 6-18 hours, thereby obtaining the high-softening-point asphalt. The invention also provides a preparation device, a prepared high-softening-point asphalt and a binding agent prepared from the high-softening-point asphalt. The invention can control the softening point of the modified asphalt within a narrow range, so that the modified asphalt has more stable quality, and the high-softening-point asphalt and binding agent with high softening point and high fixed carbon content can be prepared.

The invention relates to a pool ship collision experiment system. The pool ship collision experiment system mainly comprises a forward traction guiding device, a traction hook (8), a heading stabilizing mechanism and a reverse traction device (15). The forward traction guiding device is installed at the head end of a guide rail (7), the traction hook (8) is arranged in the middle point of a movable frame (5) and is kept in a horizontal state, a front end guiding frame (22) of a ship model (9) is clamped in the traction hook (8), and when the forward traction guiding device drags the ship model (9) to move forwards, the ship model (9) and the movable frame (5) are connected into a whole through the traction hook (8), and the ship model (9) can move forwards along with the movable frame (5) in an accelerated mode. The heading stabilizing mechanism is arranged at the tail of the ship model, and the reverse traction device (15) is arranged at the tail end of a pool guide rail and used for decelerating the movable frame (5) after the ship model accelerates in the experiment. The pool ship collision experiment system is simple in structure, movement of the movable frame is controlled, and the ship model is separated from the movable frame after the speed of the ship model reaches to the preset value.

The invention discloses a battery module, which comprises a plurality of battery cells arranged side by side and a fire extinguishing device, wherein the battery cells are provided with exhaust valves; the fire extinguishing device comprises a liquid discharging device used for circulation of cooling fluid, the liquid discharging device comprises a normal state and a liquid discharging state, andwhen the liquid discharging device is in the liquid discharging state, the cooling fluid flows out of the liquid discharging device to cool the battery cell; a first heat conduction hole is formed inthe fire extinguishing device, and the first heat conduction hole is arranged opposite to the exhaust valve to form an exhaust channel for guiding gas exhausted from the exhaust valve; and the liquiddischarging device is arranged in the first heat conduction hole. The exhaust channel is formed in the outer side of the exhaust valve of the battery cell and is used for guiding gas exhausted by theexhaust valve, so that uncontrollable fusing position of the gas due to deviation of an exhaust path is avoided, and the safety of the battery is improved.

The invention discloses a method. a device and an electronic paying system for detecting an electronic paying fault, in which the method comprises the following steps: generating automatically a testing order according to preset rules; generating paying information corresponding to the testing order; sending the testing order and the paying information to an order receiving system and receiving an order processing result from the order receiving system; checking whether the order paying has faults according to the testing order and the order processing result. The invention solves the problem that the reason causing the fault can not be detected when the order processing result can not be received in the prior electronic paying process.

The invention discloses a high-temperature-resistant and wear-resistant hard alloy with a NiAl alloying bonding phase. WC and / TiC is used as a hard phase, NiAl alloying Co and / Fe is used as a bonding phase, and the volume ratio of the hard phase to the bonding phase is equal to 10-40%. The preparation method comprises the following steps of: uniformly mixing 0.03-21.04wt% of nickel powder and aluminum powder with carbide powder based on the component proportion of Ni-50at.%Al; placing the mixture in a graphite container to spread out, heating the mixture to 660-1300 DEG C at a non-oxidative atmosphere, preserving heat, and then naturally cooling to obtain a mixture of a carbide and NiAl; grinding, crushing and screening to obtain mixed powder; carrying out deoxidation pretreatment at a hydrogen atmosphere of 400+ / -50 DEG C; carrying out wet grinding on 45.77-96.34wt% of mixed powder and the balance of Co and / Fe powder; carrying out spray-drying on the mixed material subjected to wet grinding and pressing; and sintering a compaction in a liquid phase at low pressure at the temperature of 1350-1550 DEG C to obtain the high-temperature-resistant and wear-resistant hard alloy.

The invention relates to a material mechanical performance testing platform for a small-sized test sample under a stretching bending composite loading mode and belongs to the field of material mechanical performance test. The material mechanical performance testing platform consists of four parts, namely a driving module, a stretching module, a bending module and a control detection module and can be used for carrying out uniaxial stretching test on the test sample or material mechanical performance test on the test sample under the stretching bending composite loading mode. The motion between the stretching module and the bending module is connected through an electromagnetic clutch; and during test, the loading time sequence of the bending module relative to the stretching module is controlled by controlling the power on / off of the electromagnetic clutch and further pull combined loads with different ratios are acquired indirectly. The material mechanical performance testing platform disclosed by the invention is novel in concept and compact in integral structure. For researching the mechanical performance of the test sample under the action of a random composite load for stretch bending, the invention provides an effective research means and strong practicability is obtained.

The invention discloses a single lamp illumination management system, which is especially suitable for remote single lamp illumination management in the environment of weak signals of a mobile digital public network. The system is composed of lamp controllers, a router, an environmental parameter collection module and a monitoring server. The lamp controllers are uniformly connected to the router to form a lamp local area network; and the environmental parameter collection module is capable of monitoring brightness in the environment of the lamp and changes of a visitor flow rate and a vehicle flow rate in an illumination area as well as sending a monitoring result to the monitoring server through an internet. The system provided in the invention has a remote controlling function, an off line controlling function and an adaptive controlling function.

The invention discloses a numeric control method for a liquid level control (LLC) resonant conversion circuit. The method comprises the following steps of: sampling an LLC series resonant conversion circuit and an inverter electrically connected with the LLC series resonant conversion circuit respectively by adopting a single voltage loop numeric control structure; after calculation, outputting to a numeric controller; calculating the input quantity by using the numeric controller and outputting a driving pulse; controlling the LLC series resonant conversion circuit by using the driving pulse through a driving circuit; during light load or no load, adopting a mode of combining a pulse width modulation (PWM) control strategy and a pulse frequency modulation (PFM) control strategy; and during heavy load, adopting the PFM control. By the method, load states can be judged quickly; adverse influence on system load judgment due to different loading time is screened; a dynamic working point is selected reasonably according to the judged load state and current is controlled, so that the voltage stress of the LLC series resonant conversion circuit is eliminated; the control method provided by the invention is simple; and error and instability can be effectively reduced.

The invention adopts a micro-grid frequency modulation method with an electric automobile based on an MPC and PI control method. The characteristic that an electric automobile-mounted battery acts as an energy storage device is fully utilized, and the electric automobile participates in micro-grid frequency modulation to compensate the insufficiency of load frequency control in isolated micro-grid operation under the support of an electric automobile access network technology (V2G). In the scheme, state quantity of the system of the current moment is obtained via a state observer firstly in each control cycle. An optimal control input variable and a corresponding prediction state quantity are solved by adopting an MPC controller, and the solving results are used for optimizing parameters in a PI controller, i.e. proportional and integral parameters are set again. Finally, the PI controller of which the control parameters are optimized is adopted to realize modulation control of micro-grid frequency until arrival of the next control cycle. A better control effect can be realized, and the method has global robust performance and relatively high reliability.

The invention provides a power supply chip and a display device. The power supply chip comprises a current detection module, a storage module, a control module and a voltage output module. The current detection module is used for detecting current required by a frame of image to be displayed on an OLED display panel; the storage module is used for storing correspondence relationship between the current and voltage; the control module is used for obtaining voltage corresponding to the current detected by the current detection module according to the correspondence relationship stored in the storage module, and sending a control signal to the voltage output module according to the obtained voltage; and the voltage output module is used for outputting a first supply voltage or a second supply voltage to the OLED display panel according to the control signals. The purpose of saving power consumption can be achieved under the condition of not influencing normal display of the OLED display panel, and meanwhile, the power supply chip can realize adjustment of the output voltage of the OLED display panel without control of a driving IC, and adjustment of the input voltage of the OLED display panel is simplified.

The invention discloses a method for rapid multi-nozzle 3D printing of a tumor tissue model using supporting bath, and relates to the field of biological 3D printing. The method mixes alginate, photocurable gelatin and the like to encapsulate cells and prints rapidly in the supporting bath, and printing of different cells is achieved by rapidly switching nozzles. By printing a normal tissue and atumor tissue in a complete model, the structure of a tumor tissue in vivo is better restored. The closed property of the hydrogel support bath provides a better sterile environment, and at the same time, uncontrolled cell density and species space due to settlement are avoided during printing. The rapid switching of the nozzles reduces the printing time to a certain extent, the decreasing of the activity of the cells is effectively slowed down in the printing process, and the integrity of the printing structure is effectively ensured. The problem of gel curing is effectively solved by printingwith a concentric needle. The tumor model is built faster and can be better used for tumor treatment research.

The invention relates to an organosilicon foamed material and a preparation method thereof. The method comprises the following steps: hydrogen-containing organopolysiloxane, alkoxy silane and tri(pentafluorophenyl)borane are uniformly mixed at room temperature, and a mixture is subjected to chemical foaming to prepare the organosilicon foamed material. A foaming agent is not required, a chemical reaction between Si-H and Si-OR is employed, alkane is released to prepare the organosilicon foamed material, and the problems of a uncontrollable foam structure, toxicity generated by decomposition of the foaming agent at high temperature, and easy poisoning of a platinum catalyst can be avoided. In addition, the different functional filling materials can be added in a mixing process, so that the special performance can be provided for the organosilicon foamed material. The method is suitable for sulfuration of silicone rubber foams at high temperature and room temperature, and the material can be used for sound insulation, shock absorbing, heat insulation, and package filling in the fields of national defense, aerospace, traffic transport, and electronic industry.

The invention discloses an intelligent spraying machine capable of adjusting a spraying range. The intelligent spraying machine comprises a machine base, a dust absorbing cover, a first air-drying device and a second troweling roller, wherein the upper end of the machine base is equipped with a stirring box; a measuring barrel is arranged on the stirring box; an electric motor is arranged on the inner bottom of the stirring box; a chain transmission device is connected to a stirring rod; upper and lower ends of a connecting tube are correspondingly equipped with a first material conveying tubeand a second material conveying tube; the dust absorbing cover is arranged at the outer side of a spray gun; both a first dust absorbing tube and a second dust absorbing tube are connected to an aspirated engine; the left side of the aspirated engine is connected to a dust collecting box; and the second air-drying device is arranged on the bottom of the machine base. According to the intelligentspraying machine capable of adjusting the spraying range disclosed by the invention, a protective cover and the spray gun are in threaded connection, so that the spray gun can be dismounted by rotating the protective cover; and protective covers of different models and sizes can be replaced according to dimension requirements of different product spraying positions, so that the problem that the spraying range is not easily controlled can be avoided through the protective cover.

The invention relates to an organic electroluminescent diode apparatus, which comprises an anode, a cathode and an organic electroluminescent layer formed between the anode and the cathode. The organic electroluminescent diode apparatus is characterized in that: the anode has a double-layer structure, which comprises a metal aluminum layer and a molybdenum oxide layer; light produced by the organic electroluminescent layer is emitted from one side of the anode; the anode is taken as a light-transmitting layer; and the cathode is taken as a light-tight reflecting layer. The invention provides an anode for replacing indium tin oxide (ITO) and the organic electroluminescent diode apparatus which emits light from one side of the anode. Compared with the ITO, the anode has the advantage of low price, solves the problem that elemental composition (the ratio of elements, such as In, Sn and O) of the ITO is difficult to control in a membrane forming process, and keeps high light transmittance and excellent current carrier transmission and injection performance; and the preparation process of the anode is simplified and the manufacturing cost is reduced. Light produced by the organic electroluminescent diode apparatus is emitted from one side of the anode, so the defect of too fast performance aging of an apparatus which emits light from one side of the cathode can be overcome.

The invention relates a processing method and system of an input event. The method comprises the following steps: reading an input equipment information file of a driving layer, and obtaining an event serial number corresponding to preset input equipment; monitoring the input event reported by the driving layer; and according to the event serial number of the preset input equipment and a thread for processing the input event, processing input event. The input equipment information file of the driving layer is read to obtain the event serial number of the preset input equipment, unnecessary input events can be filtered under a Recovery mode according to the event serial number, a situation that the Recovery system only responds to the input event of the preset input equipment can be guaranteed, so that equipment uncontrollability caused by the unnecessary input events can be effectively avoided under the Recovery mode, the operation of a user can be quickly responded under the Recovery mode, and the processing method and system has a high application value.

The invention relates to an organic electroluminescent diode device, which comprises an anode, a cathode and an organic electroluminescent layer arranged between the anode and the cathode. The organic electroluminescent diode device is characterized in that the cathode is a bi-layer structure consisting of a metal aluminium layer and an aluminium oxide layer, the aluminium oxide layer is formed on the metal aluminium layer; the organic electroluminescent layer is formed on the aluminium oxide layer; and the cathode is formed on the organic electroluminescent layer. The invention adopts a technical proposal of replacing ITO (indium tin oxide) with the low-cost and simple-structured anode. By using a bi-layer or multilayer structure of the low-cost metal aluminium and metal oxide, such as aluminium oxide, as the anode, the problem that the elemental composition (ratio of elements In, Sn and O) is difficult to control during the process of the formation of ITO thin film is avoided; and the high light transmittance and the good carrier transport and injection performance are kept; the anode provided in the technical proposal can replace the ITO anode in the industrial application.

The invention discloses a lawn rayon production line and production method. The lawn rayon production line comprises monofilament production equipment, after finishing equipment and a plying and twisting unit which are installed in sequence; two extruders of the monofilament production equipment of the lawn rayon production line are arranged in parallel and can produce monofilament with different colors and different types; the plying and twisting equipment conducts plying and twisting on the monofilament produced through the production line and monofilament which needs to be twisted, rewinding does not need to be conducted repeatedly, the process time and the workshop space are saved, requirements for plying and twisting production of two or more monofilament are met, and the production efficiency is greatly improved.

The invention relates to the field of the laser technology, and provides a laser beam pulse time sequence synthesizer based on diffraction gratings. The laser beam pulse time sequence synthesizer based on the diffraction gratings comprises a plurality of pulse laser sets and the gratings corresponding to the pulse laser sets, wherein when one grating moves to the work position of the corresponding pulse laser set, a synchronous control device sends an instruction to the corresponding pulse laser set and triggers the pulse laser set to output pulse laser, so that the pulse laser enters a preset main optical path under the diffraction action of the grating, and moreover, the grating does not prevent pulse laser output by other pulse laser sets from entering the main optical path when not in the work positions of the pulse. The laser beam pulse time sequence synthesizer based on the diffraction gratings integrates the spectrum synthesis technology and the mechanical time sequence synthesis technology, increases the number of synthesis paths of pulse laser and keeps good light beam quality on the premise of not reducing sub-laser wavelength intervals or the number of the diffraction gratings.

The present invention relates to one kind of vertical material distributing apparatus and process. The vertical material distributing apparatus includes one turnable platform capable of being turned into horizontal state or vertical state, one material box over the platform, one powder carrier with closed cavity, and one material feeder to fill the cavity with powdered material. The vertical material distributing process includes the following steps: setting the powder carrier on the turnable platform in horizontal state, forming one closed cavity with the material box and the powder carrier, turning the platform to vertical state, filling powdered material with the material feeder to the closed cavity, turning the platform reversely to horizontal state for the powdered material on the powder carrier, and feeding the powdered material with the powder carrier to the press for forming. The present invention has reasonable structure, high production efficiency and capacity of raising product quality.

The invention relates to a method for smelting low-carbon low-silicon aluminum killed steel on a CSP (Cast Steel Plate) production line. The method comprises the steps of desulfurizing molten iron; slagging off; converter smelting; steel tapping; deoxidizing and alloying; argon blowing in an argon feeding station; refining in an LF furnace; and normally adopting protective casting to form a blank.According to the method for smelting the low-carbon low-silicon aluminum killed steel on the CSP production line provided by the invention, the problems of high substandard rate of products, low qualification rate of components, frequency of cast steel casting break and the like caused by surface quality defects in short process production for smelting the low-carbon low-silicon aluminum killed steel at present are solved, the substandard rate of the products caused by surface inclusion defects is reduced to be within 0.4 percent, the qualification rate of the components is improved to be more than 98.5 percent, and the cast steel casting break rate is reduced to be within 0.4 percent.

The invention relates to an overhead rail AI inspection robot emergency injection fire extinguishing device. The overhead rail AI inspection robot emergency injection fire extinguishing device comprises a robot body and a robot control center. The robot body and the robot control center are erected on the same server. An emergency injection medium container is arranged on the lower portion of therobot body and filled with an aqueous foam-forming solution. An autonomous positioning injection device is installed on the lower portion of the emergency injection medium container. A high-pressure solenoid valve is installed at the end, connected with the emergency injection medium container, of the autonomous positioning injection device. The overhead rail AI inspection robot emergency injection fire extinguishing device has the beneficial effects that the fire extinguishing device is provided with the emergency injection medium container, the autonomous positioning injection device, a three-dimensional laser navigation module and a double-vision cloud platform, the emergency operation fire extinguishing function and the far infrared scanning early-stage fire early warning function areachieved, early-stage fires on the site can be treated emergently in full-automatic and semi-automatic modes, fire behavior uncontrollability is eliminated completely, and time is gained for emergencyrescue workers to arrive at the scene.

The invention provides a phase change energy storage fiber with isolation cavities. The matrix of the fiber is compact boric acid crosslinked polyvinyl alcohol. The matrix is provided with a plurality of isolation cavities which are isolated from each other, the cavities are distributed along the length of the fiber, and each cavity contains an oil soluble phase change material. The preparation method comprises the following steps: (1) preparing middle phase fluid, external phase fluid and receiving liquid; (2) by taking the oil phase change material as an internal phase fluid, respectively injecting the internal phase fluid, the middle phase fluid and the external phase fluid into an injection pipe, a transition pipe and a collecting pipe, enabling the internal phase fluid to enter the transition pipe by virtue of the injection pipe, shearing the internal phase fluid in the transition pipe into mono-dispersed drops by the middle phase fluid, enabling the middle phase fluid which carries the mono-dispersed drops to enter the collecting pipe through the transition pipe, and in the collecting pipe, carrying out crosslink curing on the components in the middle phase fluid and dehydrating to form fibers which are collected by using a receiving container for holding the receiving liquid; and (3) after the fibers in the receiving liquid are fully cured, taking out the fibers, and washing and drying to the fibers.

The invention discloses a control method for a multi-split air conditioner outdoor unit electronic expansion valves during heating. The method comprises the steps that 1, the average target opening A1 of all electronic expansion valves is calculated out; 2, whether the average target opening A1 is smaller than Amax or not is judged, if yes, the third steps is executed, and if not, the fourth step is executed; 3, half of the electronic expansion valves are switched off, the number of steps of the other half of the electronic expansion valves is adjusted to be 2A1, the switched-on electronic expansion valves are monitored in real time, and if the requirement that the openings of the switched-on electronic expansion valves are larger than the disengaging value At is met, all the electronic expansion valves are switched on with the same number of steps; 4, the number of the steps of all the electronic expansion valves are adjusted to be A1 for operation; 5, after operation is conducted for 20-40 seconds, whether the average target opening of all the electronic expansion valves at the moment is smaller than Amax or not is judged, and if yes, the third step is executed again. According to the method, it can be guaranteed that the openings of the outdoor unit electronic expansion valves are kept within the reasonable range.

The invention provides an intelligent switch controlled by sensing linkage. The intelligent switch comprises a main control module and a power source module, the intelligent switch further comprises an IO module, an NFC module, an infrared sensing module, an illumination detection module, a communication module, a relay module and an infrared transmitting module, the main control module is connected to the IO module, the NFC module, the infrared sensing module, the illumination detection module, the communication module, the relay module, the infrared transmitting module and the power source module separately, the IO module is connected to external sensing equipment, and the communication module, the relay module and the infrared transmitting module are all connected corresponding to home appliance equipment. The invention further provides a control method of the intelligent switch controlled by the sensing linkage. The intelligent switch controlled by sensing linkage is easy to operate, diverse in function and high in safety.

The invention relates to the technical field of civil engineering construction, and particularly relates to a concrete pouring mechanism. The concrete pouring mechanism solves the problems that in theprior art, the working radius range of concrete pumping cannot be reached, local construction of civil engineering is needed, a small amount of concrete is poured temporarily, and time and labor arewasted when concrete is mixed and transferred by workers in construction. The concrete pouring mechanism comprises a base, wherein a stirring box is fixedly connected to one side of the top of the base; the bottom of the stirring box is fixedly connected with the top of the base; the top of the stirring box is fixedly connected with a driving motor through a bolt; and a stirring rod is arranged inan inner cavity of the stirring box. According to the concrete pouring mechanism, concrete is pushed in the pushing mode of stirring blades and the suction mode of a piston, the flexibility of the conveying direction of the concrete is improved through a universal rotating mechanism of a long-strip-shaped discharging nozzle, and the pouring speed of the concrete is increased; and the stirring blades in the stirring box continuously operate, so that segregation of aggregate is effectively avoided, and the uniformity of concrete material composition is guaranteed.

The invention discloses an environment friendly plastic product convenient to fold, and relates to the technical field of plastic products. The environment friendly plastic product convenient to foldcomprises a first fixed plate and a second fixed plate, wherein one end of the first fixed plate is fixedly connected with a fixed shaft; one end of the second fixed plate is fixed with a fixed ring;the fixed shaft is connected to the fixed ring in a flexible way; the bottom of the first fixed plate and the second fixed plate are provided with fixed grooves; one side of the fixed grooves is fixedwith a rotating shaft; a supporting leg sleeves the outside of the rotating shaft; the circumferential direction of the rotating shaft is provided with a groove. According to the environment friendlyplastic product convenient to fold, the first fixed plate and the second fixed plate can be folded into two layers conveniently by setting the fixed shaft and the fixed ring, thereby reducing the occupation area; by setting the supporting leg and the rotating shaft, the first fixed plate and the second fixed plate can be supported in a table shape; the environment friendly plastic product convenient to fold can make the first fixed plate and the second fixed plate flat; the product not only achieves the purpose of folding, but also achieves a multi-functional effect.

The invention relates to a microscopic simulation method based on house selecting models of house-renting selectors and house selecting models of house-purchasing selectors. According to the method, the selection influence factors of the two kinds of selectors at house selecting time are researched, house selecting sub-models of the two kinds of the selectors are established, the utility probability is calculated through a multiple discrete selection method, the utility equation coefficient is estimated through the maximum likelihood estimation method, and the contribution degree, the credibility and the fit goodness of the sub-models can be detected through t statistic value and the adjustable log-likelihood ratio. By the adoption of the method, the house selecting behavior of townsfolk can be simulated, scientific, effective and global decision suggestions can be given to individual house selection of residents, changes of city land utilization can be effectively simulated and predicted, and auxiliary decision support is provided for city construction, management and planning work.