44results about How to "Good degree of freedom" patented technology

The invention provides a nonaqueous electrolyte material, which consists of fluorosulfonylimide lithium and organic solvent with dielectric constant less than 30, and the organic solvent is selected from one or more of chain-like carbonate solvent, phosphate solvent, siloxane solvent, boroxane solvent, acetate solvent, propionate solvent, butyrate solvent, CF3OCH2CH2OCF3 solvent, C2H5OCH2CH2OCH3 solvent, C2F5OCH2CH2OCF3 solvent, 1,3-dioxolane solvent and aliphatic nitrile solvent with more than two carbon atoms. The ionic conductivity of the nonaqueous electrolyte material is 0.01mS / cm to 18mS / cm, the lithium ion transference number is tLi plus equal to 0.2 to 0.8, and the applicable temperature range is 80DEG C below zero to 60DEG C below zero. The invention also provides an application of the nonaqueous electrolyte material in the preparation of lithium batteries and super capacitors. Furthermore, the invention provides a lithium battery and a super capacitor which contain the nonaqueous electrolyte material of fluorosulfonylimide lithium.

The invention relates to the technical field of radar, and in particular relates to a monostatic expansion co-prime array MIMO radar DOA estimation method based on non-circular signals. The method comprises the steps of sampling data after matched filtering of the receiving array elements to obtain receiving data of an equivalent virtual array; then carrying out conjugate processing and combiningthe receiving data into new expansion receiving data; carrying out spatial covariance matrix and eigenvalue decomposition; constructing a calculation expression of a spatial spectrum according to orthogonality of a noise subspace and a steering vector; and searching positions of K spectral peaks by the spectral peaks to obtain arrival direction estimation of K incoming waves. According to the method, an expansion co-prime array is used as a transmitting array and a receiving array of a MIMO radar; the array space of the transceiving array is greatly expanded; meanwhile, the non-circular signals are used as the transmitting signals of the transmitting array of the MIMO radar; and the DOA estimation performance is greatly improved by combining the non-circular characteristics of the non-circular signals, the excellent spatial resolution and parameter identifiability of the MIMO radar and the triple advantages of expanding the array aperture expanded by the co-prime array.

A control valve, the control valve includes a valve seat plate, the valve seat plate has a plurality of valve ports; a valve body, the valve body faces the valve seat plate; a rotary drive mechanism, the rotary drive mechanism is used to make the valve body Rotate around a specified axis of rotation. In a state where the valve body is in contact with the valve seat, the valve body rotates in such a way that each valve port is opened and closed. The plurality of valve ports are provided on a plurality of imaginary circles having different radii centered on the rotation axis of the valve body. As a result, the number of valve ports can be increased without increasing the overall size of the control valve. In addition, a control valve having an excellent degree of freedom in opening and closing control of the valve port is obtained.

A multidirectional input device to surely prevent looseness without sacrificing operability even if the size of an operation body and the weight thereof are increased is provided with: a housing (1); the operation body (3) having a drive part (4), a first operation shaft (5) and an operation knob (6) mounted to the tip of the first operation shaft (5); a second operation shaft (7) vertically movably held in a guide hole (3a) formed in the operation body (3); and a coil spring (9) mounted between the upper surface of the housing (1) and the operation knob (6). By pressing an arbitrary position of the operation knob (6) to tilt the first operation shaft (5), the drive part (4) selectively turns on a plurality of push-switches (S2) corresponding to the tilting direction, and by pressing a push-knob (8) mounted to the upper end of the second operation shaft (7) downward, the lower end (7a) of the second operation shaft turns on a push-switch (S1).

The invention discloses a biped robot capable of conducting wheeled motion and a working method thereof. The biped robot comprises a top mounting plate, the left side and the right side of the bottomof the top mounting plate are connected with a first foot sole plate and a second foot sole plate for walking through three steering engines correspondingly, and the left-front side and the right-front side of the top mounting plate are connected with a first wheel and a second wheel through a first steering engine and an eighth steering engine correspondingly. The biped robot has the characteristics of simple structure and large wheel diameter size, can quickly roll on the flat terrain, and has high terrain adaptability; and the robot can also be switched into a foot-type robot in a biped form, can realize a walking mode similar to lower limbs of a human body, can adapt to the rugged and complex terrain environment, is simple and reasonable in overall structure and easy to deform, and canbe widely applied to occasions of production and life.

The invention discloses novel low-temperature flame-retardant electrolyte. The electrolyte contains fluorine-containing sulphonylimine lithium, lithium hexafluorophosphate and an organic solvent with lower dielectric constant, wherein the molar concentration of mixed lithium in a nonaqueous electrolytic solution is 0.5-2mol / L, and the molar ratio of the fluorine-containing sulphonylimine lithium and the lithium hexafluorophosphate is 1-5:1; and the organic solvent with lower dielectric constant is selected from one or several of chain carbonic ester, phosphate and a boroxane solvent. The electrolyte provided by the invention can have higher conductivity within the temperature range of -60 to 60 DEG C, and a lithium secondary battery prepared by using the electrolyte has higher battery efficiency within the temperature range, thereby ensuring that the electrolyte and the lithium secondary battery are used in wide temperature range with higher fire resistance and safety.

The invention provides an automatic calendar mechanism, a movement and a clock, wherein simple structure and high displaying freedom of month and date are realized. The automatic calendar mechanism (10) is provided with the components of a month wheel which rotates around a first shaft (C1) and rotates one circle in one year; a minor solar month date change wheel (25) which rotates around the first shaft (C1) and rotates one circle in one day; a minor solar month date feeding pawl (35) which is arranged on the minor solar month date change wheel (25) and performs displacement and synchronous rotation with the minor solar month date change wheel (25); a date changing wheel (40) which is provided with a date changing claw (42) and rotates one circle in one day; and a date wheel (50) which is provided with a month end claw (53) and a date wheel tooth part (51) that is pressed by the date changing claw (42), wherein the date wheel rotates around a second shaft (C2) and rotates a circle in one month. The minor solar moth date feeding pawl (35) presses a month end pawl (53) at a last day of a minor solar month in which the number of days is less than 30, thereby making a date wheel (50) rotate.

This invention discloses one roller parts keeping mode set, which is characterized by the following: setting upper and down thin board combination parts with isolation space by use of beehive structure as rolling parts for effective positioning without over friction limitation due to the beehive structure on rolling parts.

An antenna is provided which includes a first antenna element having at least one base and a conductor penetrating through the base and a second antenna element having a conductor portion having a shape of a plate or a line and a connecting conductor, wherein a first end of the conductor of the first antenna element is connected to the connecting conductor of the second antenna element, and the connecting conductor of the second antenna element is connected to a partway on the conductor portion of the second antenna element.

The invention relates to the technical field of radars, and in particular relates to a bistatic expansion co-prime array MIMO radar DOD and DOA dimension reduction estimation method. The method is based on a bistatic expansion co-prime array MIMO radar array structure. A bistatic expansion co-prime array MIMO radar departure angle and arrival angle joint estimation method based on a dimension reduction multi-signal classification algorithm is provided. According to the method, by adding constraints and constructing a cost function, a two-dimensional spectral peak search maximum value in a two-dimensional MUSIC algorithm is converted into a one-dimensional optimal value with constraints, DOA and DOD are obtained in sequence, and the DOD and the DOA are automatically paired. The introductionof the dimensionality reduction idea enables the algorithm to be free of two-dimensional search, so that the complexity is significantly reduced; due to the larger array aperture of the expansion co-prime array and the virtual array formed with the MIMO radar, the performance of the method is excellent in all aspects. In addition, the problem of phase ambiguity possibly caused by the fact that the array element distance is larger than half wavelength is solved through co-prime of the number of sub-arrays.

The invention relates to an underframe structure for a vehicle, in particular for a motor vehicle, having at least one assembly or component which is to be protected and which is arranged in the region of the underframe structure which preferably has a crossmember which reinforces said underframe structure, and having a stabilizer. According to the invention, a centre region (30a), running in the lateral direction of the vehicle, of the stabilizer (30) is positioned so far in the downward direction when viewed in the direction of the vertical axis of the vehicle that said centre region (30a) forms, independently of a crossmember arrangement of the underframe structure, both in the design position and in the state of spring compression, a rear end collision protection for assemblies (26) or components which are to be protected and which are arranged therebehind when viewed in the direction of travel or the longitudinal direction of the vehicle.

The invention discloses a clay robot and a manufacturing method of the clay robot, and belongs to the field of educational entertainment robots, intelligent toys and teaching aids. The clay robot comprises a control system and a clay coat, wherein the clay coat wraps the control system. The control system comprises a power module, a controller and an execution module, wherein the power module provides electricity for the controller and the execution module, a first motion instruction is stored in the controller, the controller is used for sending the first motion instruction to the execution module and triggering the execution module to execute a first preset motion according to the first motion instruction. According to the clay robot and the manufacturing method of the clay robot, the cost consumed in the process that shells in an existing robot and other intelligent devices such as intelligent dolls are defined by users and the difficulty in the process that shells in the existing robot and other intelligent devices such as the intelligent dolls are defined by the users can be effectively reduced.

A first throttling valve mechanism and a second throttle valve mechanism are arranged at both axial ends of the casing. Each throttling valve mechanism includes a valve seat and a valve body, the valve seat is fixed on the shell, and the valve body faces the valve seat. The second valve seat has an inflow port for feeding coolant into the housing interior. Each valve seat has a valve port, and the valve port is used to let the coolant sent into the inside of the casing flow out to the outside of the casing. Each valve body rotates so as to adjust the degree of opening of the valve port while in contact with the corresponding valve seat. The rotor provided inside the housing is connected to the two valve bodies so as to rotate the two valve bodies. Rotation control is performed on the two valve bodies so as to adjust the outflow of coolant through the respective valve ports through the corresponding valve bodies.

The invention discloses an externally-threaded structure matched with an internal thread of a wedge-shaped anti-loose thread. The externally-threaded structure comprises an externally-threaded body. Each external thread section of the externally-threaded body comprises a guiding side, a follower side, a top and a bottom, wherein the top and the bottom extend between the guiding side and the follower side; each top is a circular arc surface formed by extending from the guiding side to a joint of the follower side in an arc mode; and each circular arc surface can be in point contact fit with aninternal thread tip in the cooperative tightening process of the external thread and an internal thread. The structure can be freely matched with traditional internal threads of JB / T10971 30-degree wedge-shaped anti-loose threads, and the matching strength is enhanced; the structure is freely matched with standard internal threads, and the use and mechanical properties are not affected; noise caused during screwing with the internal threads can be lowered; and the screwing degree of freedom is increased, and the labor intensity during installation is relieved.

The invention discloses a multidirectional shock absorbing and buffering device for extracting a centrifugal tube in a centrifugal machine and a using method of the multidirectional shock absorbing and buffering device in the field of shock absorbing and buffering equipment. The multidirectional shock absorbing and buffering device comprises an upper fixing plate and a lower mounting platform, a plurality of sets of hydraulic shock absorbers arranged between the upper fixing plate and the lower mounting platform, a gas conveying pipeline is arranged in the middle of the lower side of the lower mounting platform, an air charging connector is arranged at the lower end of the gas conveying pipeline, a balloon is mounted on the air charging connector, an air inlet opening of the balloon corresponds to the periphery of the air charging connector, a compacting shock absorbing mechanism for tightly pressing the balloon is arranged corresponding to the balloon, and a jacket for clamping a centrifugal tube to be extracted is connected to the lower mounting platform. The method comprises the following steps that a compacting sleeve tightly presses the opening part of the balloon on the air charging connector, the shriveled balloon correspondingly extends into the centrifugal tube to be extracted, the balloon expands to be attached to the inner wall of the centrifugal tube, the centrifugal tube is slowly lifted, and the centrifugal tube is placed on a test tube rack. The centrifugal tube can be stably extracted, and layered and deposited substances in the centrifugal tube are prevented from being mixed again.

The invention discloses a design method of a prototype filter in an alternate FBMC-QAM system. Firstly, it assumes that a synthesis filter bank and an analysis filter bank of odd and even sub-carriersin a circumambient FBMC-QAM system are respectively obtained by alternate modulation of four different prototype filters; secondly, design of the four prototype filters in the system is described asa convex optimization problem without constraints; an objective function thereof is the sum of stop band energy of inter-symbol interference (ISI), inter-carrier interference (ICI) and the prototype filter of the alternate FBMC-QAM system; on the basis of a gradient vector of the objective function obtained by derivation, an optimization problem is solved by adoption of a double-iteration mechanism; and finally, a synthesis filter and an analysis filter having better performances in the odd and even sub-carriers can be obtained. Compared with the prior art, the stop band energy of the prototype filter in the FBMC-QAM system designed in the invention is relatively low; the obtained FBMC-QAM system has better performances; and thus, an effective solution can be provided for designing a largeFBMC-QAM system.

The rigid axle assembly has a rigid axle (1) protruding from a multi-point link mounting bracket having control arms (18,19) formed above the axle console side multi-point handlebar attachment area of the mounting bracket and directly / indirectly connected to the frame of vehicle. The multi-point link connection portion (12) is arranged relative to the longitudinal center portion (9) of axle housing (2), starting from the controls arms and leading to the axle housing and connected to opposite sides of the longitudinal central region of axle housing.

The present invention provides: a synthetic resin skin material that has a base fabric and a vinyl chloride resin skin layer that is formed on the base fabric, the vinyl chloride resin skin layer including a vinyl chloride resin that has a degree of polymerization of 1600-3000 and a silicone / acrylic copolymer that is included in an amount of 3-20 parts by mass relative to 100 parts by mass of thevinyl chloride resin; and a method for producing the synthetic resin skin material.

The invention relates to a thermoplastic composite pipe with a multilayer intermediate lamina. The invention further relates to a method for manufacturing the thermoplastic composite pipe and use of the thermoplastic composite pipe. Composite formation between identical polymers in the critical process step achieves better quality of adhesion. The pipe thus produced is especially suitable for offshore applications in oil or gas production.

The invention discloses a design method of a prototype filter in an alternate FBMC-QAM system. Firstly, it assumes that a synthesis filter bank and an analysis filter bank of odd and even sub-carriersin a circumambient FBMC-QAM system are respectively obtained by alternate modulation of four different prototype filters; secondly, design of the four prototype filters in the system is described asa convex optimization problem without constraints; an objective function thereof is the sum of stop band energy of inter-symbol interference (ISI), inter-carrier interference (ICI) and the prototype filter of the alternate FBMC-QAM system; on the basis of a gradient vector of the objective function obtained by derivation, an optimization problem is solved by adoption of a double-iteration mechanism; and finally, a synthesis filter and an analysis filter having better performances in the odd and even sub-carriers can be obtained. Compared with the prior art, the stop band energy of the prototype filter in the FBMC-QAM system designed in the invention is relatively low; the obtained FBMC-QAM system has better performances; and thus, an effective solution can be provided for designing a largeFBMC-QAM system.

The invention provides an automatic calendar mechanism, a movement and a clock, wherein simple structure and high displaying freedom of month and date are realized. The automatic calendar mechanism (10) is provided with the components of a month wheel which rotates around a first shaft (C1) and rotates one circle in one year; a minor solar month date change wheel (25) which rotates around the first shaft (C1) and rotates one circle in one day; a minor solar month date feeding pawl (35) which is arranged on the minor solar month date change wheel (25) and performs displacement and synchronous rotation with the minor solar month date change wheel (25); a date changing wheel (40) which is provided with a date changing claw (42) and rotates one circle in one day; and a date wheel (50) which is provided with a month end claw (53) and a date wheel tooth part (51) that is pressed by the date changing claw (42), wherein the date wheel rotates around a second shaft (C2) and rotates a circle in one month. The minor solar moth date feeding pawl (35) presses a month end pawl (53) at a last day of a minor solar month in which the number of days is less than 30, thereby making a date wheel (50) rotate.

The rigid axle assembly has a rigid axle (1) protruding from a multi-point link mounting bracket having control arms (18,19) formed above the axle console side multi-point handlebar attachment area of the mounting bracket and directly / indirectly connected to the frame of vehicle. The multi-point link connection portion (12) is arranged relative to the longitudinal center portion (9) of axle housing (2), starting from the controls arms and leading to the axle housing and connected to opposite sides of the longitudinal central region of axle housing.