60results about How to "Avoid excessive noise" patented technology

A branched optical isolator includes, located over a substrate, at least two branches connected to a trunk at a junction location. At least one branch comprises an optical absorber material and at least one branch comprises an optical transmitter material. The optical isolator may be incorporated into an optical chip carrier such that: (1) an optical emitting portion of an optical chip integral to or attached to the optical chip carrier; and (2) a connection to the optical isolator, are butt connected with a gap less than 10 nanometers, and otherwise materials matched. The optical isolator provides for attenuated backscattered optical radiation into the optical chip.

The invention discloses an intrusion detection method based on observational learning. According to the intrusion detection method, the observational learning and semi-supervised ensemble learning are combined, unlabeled data is labeled to form a labeled data set with an ensemble result by individual classifier by observing output results to an unlabeled data set by other classifiers in network data detection, and the labeled data set is added to the original labeled data set to train the classifier again. According to the intrusion detection method, the unlabeled data is fully used and is translated to the labeled data to further improve the performance of the classifiers, and the intrusion detection method also has good detection effect in the case of a small amount of the labeled data. According to the intrusion detection method, each classifier generates virtual data per se without help of any external forces in the learning process, the virtual data and initial data set are trained, re-observed and re-trained together, and the identification performance of a detection system is effectively improved. The intrusion detection method can be expanded for processing a large amount of unlabeled training data, such as the application fields of medical images, web page classification, remote sensing image processing, face identification, and the like.

The invention provides a method for protecting the privacy under the condition of MapReduce data processing frameworks, and belongs to the field of big data. An executing procedure of the method includes steps of (1), allowing users to define the maximum output ranges MaxRange of functions Mapper according to particularity of application environments; (2), judging whether results computed according to the maximum output ranges MaxRange and the functions Mapper are within the maximum output ranges MaxRange or not; (3), adding Laplacian noise to the output results of the functions Mapper according to differential privacy protection formulas if the results are within the maximum output ranges, or randomly selecting a number from the maximum output ranges MaxRange to be used as an output result of each function Mapper if the corresponding result is not within the corresponding maximum output range. The method has the advantages that the quantity of the functions Mapper for executing differential privacy protection can be reduced, and accordingly the algorithm running time can be shortened; the problem of excessively loud noise due to excessively high or low output valves of existing functions Mapper can be solved, requirements of differential privacy protection rules can be met, and the query precision can be improved.

A module (101) for controlling the transmit power of a signal transmitter. The output power is determined from a first contribution based on a first set of parameters configured by an operator and a second contribution based on a second set of parameters. The module (101) is able to configure the second set of parameters based on the first set of parameters.

The invention provides a gasoline injection amount control method for a dual-fuel engine. The method includes the following steps that the maximum permission gasoline injection amount and the minimum permission gasoline injection amount after correction are acquired based on the current operating state of the engine according to the circulation gas inlet amount, the engine revolution speed, the temperature inside a cylinder and the EGR rate; if the current gasoline injection amount is larger than the maximum permission gasoline injection amount, the maximum permission gasoline injection amount is used for executing gasoline injection; if the current gasoline injection amount is smaller than the minimum permission gasoline injection amount, the minimum permission gasoline injection amount is used for executing gasoline injection; otherwise, the current gasoline injection amount is used for executing gasoline injection. Meanwhile, the invention further relates to a gasoline injection amount control system for the dual-fuel engine. According to the technical scheme, the gasoline injection amount can meet the using requirement, gasoline can be burnt sufficiently, and THC emission is lowered; meanwhile, the phenomenon that the noise of the engine is too large is avoided, and the advantages of the dual-fuel engine can be performed to a greater extent.

The invention provides a fan control method and device. The method comprises the steps of responding to a fan starting command, so that the environmental temperature is obtained; determining the initial rotating speed of a fan according to the environmental temperature, and controlling the fan to run at the initial rotating speed; obtaining the condensing pressure formed when the fan runs; and adjusting the rotating speed of the fan according to the condensing pressure. By means of the fan control method and device, the problem that existing fans run at the highest rotating speed all the time,so that noise is excessively large is solved; and the technical effect that the noise is effectively reduced is achieved.

The invention discloses a method for turning on a screen of an intelligent watch by raising a hand. The method adopts a gravity sensor module to acquire component data of gravity acceleration in the X direction and the Y direction of a display screen of the intelligent watch, namely, X-axis acceleration and Y-axis acceleration, takes M groups of the X-axis acceleration and the Y-axis acceleration as a judgment object, and judges whether a gesture action corresponding to the judgment object conforms to a hand raising gesture rule. The hand raising gesture rule is used for judging whether the Y direction changes from a negative direction to a positive direction, whether the magnitude of an absolute value of a numerical value of the Y-axis acceleration changes slowly and whether the magnitude of an absolute value of a numerical value of the X-axis acceleration changes slowly from the beginning when a user raises the hand wearing the intelligent watch to the final stage when the user looks at the display screen of the intelligent watch. Therefore, whether the current gesture action conforms to the hand raising gesture rule or not is at least regarded as a hand raising screen turning-on condition for controlling whether the display screen is turned on, thereby realizing the hand raising screen turning-on function of the intelligent watch. The method provided by the invention can be used for automatically turning on the display screen when the user raises the hand to look at the intelligent watch.

The invention provides a method, a system and a computer for realizing temperature control, wherein the method includes the steps: controlling an arbitration module to receive an identification signal after a system fan group is in an uncontrolled state and judging that a fan control module owning the current control power of the system fan group loses the control power according to the identification signal; judging that the other fan control module which independently runs obtains the control power according to the identification signal, sending a control signal sent from the fan control module which independently runs to the system fan group and controlling the output power of the system fan group. The embodiment applying the technology provided by the invention only needs adding one or several fan control modules which are independently work, and the other fan control module can obtain the control power when one fan control module fails, thereby the system noise over standard caused by the uncontrolled heat radiation control function of the system and system crash caused by the overheated system are avoided and the stability of the system is enhanced.

The invention discloses a low-noise generator set, and relates to the technical field of generators. The low-noise generator set comprises a shell, a handle, a movable wheel, a generator, a buffer pad, a vibration damper, an air outlet, a noise reduction device and a radiation device. The handle is fixedly arranged at the left side of the shell. The low-noise generator set is provided with the noise reduction device to decrease the vibration dynamics of the generator so as to reduce the noise, the vibration amplitude can be effectively alleviate through a first buffer spring, a second buffer spring and a third buffer spring, the conversion effect of the force can be effectively enhanced through a first rack plate, a second rack plate, a pulley and a chute block, a guide limiting groove block is arranged on the first rack plate to better improve the propagation effect of transverse force and ensure the motion direction and the motion track of the first rack plate, and therefore, the effect of the vibration of the generator is reached, and the big condition of noise caused by too big vibration amplitude of the current generator is solved.

The invention discloses a tripod head device. The device is used for supporting photographing equipment such as a camera and a video camera and comprises a base (1), a mounting base plate (7), a rotating shaft (14), a first gear (2), a second gear (13), a first motor (9), a support (3), a camera corner support (6), a pitching rotating shaft (8), a third gear (5), a fourth gear (10) and a second motor (11), wherein the base (1) is connected to the mounting base plate (7) through the rotating shaft (14), the first motor (9) drives the first gear and the second gear to drive the mounting base plate (7) to rotate around the rotating shaft (14) in the first direction, and the second motor (11) drives the third gear and the fourth gear to drive the camera corner support (6) to rotate around the pitching rotating shaft (8) in the second direction. According to the tripod head device, the swing amplitude of the rotating angle can reach 15 degrees in the up-down direction and 15 degrees in the left-right direction, the dead weight is small and the use is durable.

The invention discloses an air conditioner control method. The method comprises the following steps: acquiring noise data in a classroom timely or on real time; if the noise data are beyond first preset decibel value in preset frequency or preset time, determining that the classroom is currently in an activity learning state; and increasing the input quantity of an air conditioner, wherein the input quantity includes one or a plurality of quantity of refrigerating heat, quantity of purification or fresh air volume. The invention also discloses the air conditioner and a computer readable storage medium. With the adoption of the method, the circumstance that the noise which is beyond the standard is inaccurately determined when students read aloud or play other study activities aloud in theclassroom can be avoided based on the current state of the classroom, and thus the user experience is increased.

The invention discloses a disinfection sterilization and purification air supply and return tail end device. The disinfection sterilization and purification air supply and return tail end device comprises an air outlet component and a disinfection sterilization and purification mechanism, the disinfection sterilization and purification mechanism comprises a shell, a disinfection sterilization module and a fan, the disinfection sterilization module and the fan are arranged in the shell, an air duct is formed between an air inlet and an air outlet of the shell, a filter assembly is arranged at the air outlet, the air duct is internally provided with a flow guide piece for dividing the air duct into an accelerating area and a uniform speed area which are arranged in parallel, the fan is arranged in the accelerating area and provides accelerating power support for the air flowing speed in the accelerating area, due to the arrangement of the filter assembly, the air resistance of air flowing is increased, the air volume is correspondingly reduced, the reduced air volume part is compensated through the arrangement of the flow guide piece, kinetic energy support is provided for sterilizedair to penetrate through the filter assembly to enter a room, meanwhile, a pressure head of the fan does not need to be increased for supplementing air volume, excessive noise is avoided, and the device is used for the field of air purification.

The invention discloses a system for separating oxygen and oxygen from air based on variable-frequency negative-pressure method. The system comprises a gas processing unit, a gas separation unit and a main control unit. The main control unit comprises a measurement and control chip module, an intelligent control module and a man-machine interaction module. The measurement and control chip module obtains the temperature t of the air entering a hollow fiber membrane through a temperature sensor, the concentration c of oxygen at a vent of a variable-frequency vacuum pump through an oxygen analyzer, the flow x of the gas at a gas outlet of a gas storage tank through a flow sensor as well as the oxygen concentration range and gas flow range set by a user through the man-machine interaction module. The measurement and control chip module analyzes the oxygen concentration c, the oxygen concentration range set by the user, the gas flow rate x and the gas flow range set by the user according to different air temperature t, and sends the analysis results to the intelligent control module. The intelligent control module controls an electronic three-way valve, the variable frequency vacuum pump and a flow control valve by commands according to the analysis results.

The invention relates to a device and method for adjusting radiation power and electronic equipment. The device comprises a first distance sensor, a processor and a modem, The first distance sensor isused for detecting whether a user is close to the first distance sensor; The processor is electrically connected with the first distance sensor and used for calculating the capacitance value variation of the capacitance of the first distance sensor according to the voltage of the first distance sensor; And the modem is electrically connected with the processor and is used for adjusting the radiation power of the wireless communication module according to the capacitance variation. According to the embodiment, the radiation power of the wireless communication module is adjusted through the capacitance value variation, so that the power consumption of the electronic equipment can be reduced, the influence of radiation signals on a user can be reduced, the problem of overlarge noise during optical detection in the prior art can be avoided, and the detection and control precision can be improved.

The invention discloses a decision model privacy protection publishing method based on objective function disturbance, and aims to solve the problems that a privacy leakage risk is brought to participating users when an existing intelligent decision model is published, and the accuracy of the decision model is severely reduced due to direct application of a privacy protection technology. The method comprises the following steps: firstly, constructing an objective function according to user decision data in an intelligent decision scene, performing decomposition and Taylor expansion on the objective function, then calculating a sensitivity upper bound based on a privacy protection model, finally disturbing the objective function, calculating model parameters according to the disturbed objective function, so the privacy protection release of the decision model is realized. Compared with other privacy protection methods which directly disturb the parameters of the decision model, the method has the advantages that the target function of the decision model is disturbed, excessive noise is prevented from being introduced into the model parameters, and therefore the accuracy of the decision model with privacy protection is effectively improved.

The invention relates to an indicator apparatus (1) having a ring pointer (2), which is mounted such that it can move in the circumferential direction (5), and having a drive unit (3), which drives the ring pointer (2) in the circumferential direction (5), wherein the ring pointer (2) interacts with a stop (10) in a manner limited in terms of its circumferential movement. Particularly in the case of synchronization, radial disengagement often occurs in conventional ring pointer arrangements, and the aim of the invention is to prevent this. In order to solve the problem, the invention proposes arranging the stop (10) directly next to the drive unit (3). The critical advantage of this is that the tangential force on the ring pointer (2) from the drive unit generates an only small disengagement moment on the ring pointer (2).

The invention discloses a reciprocating travel device, comprising a casing, a piston, a temperature control unit and a transmission module. The piston can be flexibly arranged in the casing, thereby, a first chamber and a second chamber are formed on both sides of the piston inside the casing. The first chamber is filled with gas, the transmission module corresponds to the second chamber and is arranged on the other side of the casing; the temperature control unit is used to repetitively heat and cool the gas in the first chamber so as to drive the piston to make reciprocating movements inside the casing, and as a result, the transmission component is facilitated to make reciprocating travel.

The invention provides a jitter frequency adjusting circuit, method and a chip, and the circuit comprises a sampling module which is connected with an external load circuit provided with a switching tube, and the sampling module is configured to obtain a power signal of the external load circuit; an oscillation module which is configured to output an oscillation signal; a control module which is respectively connected with the sampling module and the oscillation module, wherein the control module is configured to control the jitter interval of the frequency of the oscillation signal according to the load degree represented by the power signal and generate a driving signal based on the frequency of the oscillation signal; and a driving module which is respectively connected with the switching tube and the control module, wherein the driving module is configured to control the on-off state of the switching tube according to the driving signal. According to the circuit, when the voltage at the two ends of the load is relatively high or the current flowing through the load is relatively large, the jitter interval of the frequency of the driving signal of the switching tube is controlled to be reduced, and when the network compensation is carried out, the obtained duty ratio of the switching tube is accurate and the error is relatively small, so that the accuracy of the network compensation is improved.

The invention provides a shuttle boat driving device of a circular weaving machine. The shuttle boat driving device includes a plurality of first magnetic members and a plurality of second magnetic members which are arranged on two side edges of a shuttle boat; a plurality of first electromagnets and a plurality of second electromagnets which are arranged on two side walls of a rail disc, wherein the first electromagnets and the second electromagnets can be controlled by alternating current to perform magnetism switching at the same time so as to heteropola-attract or homopolar-repulse the first magnetic members and the second magnetic members of the shuttle boat and allow the shuttle boat to move with respect to the rail disc; a plurality of rail bottom magnetic members which are be arranged on the bottom of the rail disc; and a plurality of shuttle boat bottom magnetic members which are arranged on the bottom of the shuttle boat, wherein the rail bottom magnetic members and the shuttle boat bottom magnetic members have the same magnetism, and then the shuttle boat can suspend with respect to the bottom of the rail disc.