33results about How to "Satisfy Compensation Requirements" patented technology

For resonance image data of an imaged subject, a method that first detects and estimates the dominant motions of k-space data (i.e., the motion vectors) and then constructs a graphical model for each estimated motion vector. The segments of the k-space that are determined to be corrupted by motion are restored by minimizing the energy associated with the corresponding graphical model. Consequently, the MR image of the imaged subject becomes free of motion artifacts.

An internal combustion engine control device is configured to take a fuel property into account when compensating for torque decline that occurs when a prescribed combustion control mode is executed. The internal combustion engine control device is configured to calculate a first modification coefficient designed to modify a first torque correction coefficient corresponding to a air-fuel ratio based on the specific gravity of the fuel, a second modification coefficient designed to modify a second torque correction coefficient corresponding to a working gas quantity based on the specific gravity of the fuel, and a third modification coefficient designed to modify a third torque correction coefficient corresponding to a fuel injection timing based on an aromatic component content ratio of the fuel. The internal combustion engine control device is then configured to multiply the first, second and third modification coefficients together to calculate a modification coefficient for modifying a torque correction value.

In a distortion compensation device which uses distortion compensation coefficients to subject distortion compensation processing to an input signal and supply the result of the distortion compensation processing to a distorting device, calculates the distortion compensation coefficients based on the input signal before distortion compensation and the feedback signal fed back from the output side of the distorting device, and stores the calculated distortion compensation coefficients in association with the input signal, (1) the feedback signal is AD-converted; (2) the AD-converted output is subjected to fast Fourier transform (FFT) processing; (3) the FFT calculation result is used to calculate the value of either the signal-to-noise ratio SNR, or the adjacent channel leakage power ratio ACLR, or the noise level; (4) the delay time occurring in the distorting device and feedback loop is adjusted such that the difference between the above calculated value at the current time and the above calculated value at the immediately preceding time is either zero, or is equal to or less than a threshold value; and, (5) this adjustment processing is repeated to determine the accurate delay time, and based on this delay time the timing of each of the portions of the distortion compensation device is adjusted.

A zoom lens system comprising a first lens unit of negative power, a second lens unit of positive power and a third lens unit of positive power, wherein in zooming, the lens units move respectively along an optical axis so that an interval of first lens unit and second lens unit decreases while an interval of second lens unit and third lens unit changes with variable magnification, the first lens unit comprises one object side negative lens element and one image side positive lens element, which have an aspheric surface, and the conditions: n12>1.88, nu12<26 AND 3.0<F3 / fW<5.5 (omegaW>30, n12 and nu12 are refractive index and Abbe number, respectively, of the image side positive lens element of the first lens unit, f3 is a composite focal length of the third lens unit, fW is a focal length of the entire zoom lens system at a wide-angle limit) are satisfied.

An electron microscopy system and an electron microscopy method for detection of time dependencies of secondary electrons generated by primary electrons is provided, in which the primary electron pulses are directed onto a sample surface and electrons emanating from the sample surface are detected, time resolved. To this end the system comprises in particular a cavity resonator. A cavity resonator can also be used to reduce aberrations of focusing lenses.

Disposed in order from a magnification side are a negative first group which is fixed during zooming to effect focusing, second to fifth groups of positive refractive power which move with mutual relationship during magnification variation, and a fixed sixth group. A negative lens made of a glass material which has an anomalous dispersion property and which has 70 or more in Abbe number is disposed in the first lens group. A positive lens made of a glass material which has an anomalous dispersion property and which has 70 or more in Abbe number is disposed in the third group located closer to a reduction side than a diaphragm. The negative lens and the positive lens are cemented to their adjacent lenses, respectively. Also, bf / fw≧2.7 is satisfied where bf denotes a back focus, and fw denotes a focal length of the entire system at a wide-angle end.

Disposed in order from a magnification side are a negative first group which is fixed during zooming to effect focusing, second to fifth groups of positive refractive power which move with mutual relationship during magnification variation, and a fixed sixth group. A negative lens made of a glass material which has an anomalous dispersion property and which has 70 or more in Abbe number is disposed in the first lens group. A positive lens made of a glass material which has an anomalous dispersion property and which has 70 or more in Abbe number is disposed in the third group located closer to a reduction side than a diaphragm. The negative lens and the positive lens are cemented to their adjacent lenses, respectively. Also, bf / fw ≧2.7 is satisfied where bf denotes a back focus, and fw denotes a focal length of the entire system at a wide-angle end.

A zoom lens system comprising a first lens unit of negative power, a second lens unit of positive power and a third lens unit of positive power, wherein in zooming, the lens units move respectively along an optical axis so that an interval of first lens unit and second lens unit decreases while an interval of second lens unit and third lens unit changes with variable magnification, the first lens unit comprises one object side negative lens element and one image side positive lens element, which have an aspheric surface, and the conditions: n 12>1. 88, ν12<26 and 5.0<αiW<20.0 (ωW>30, n12 and ν12 are refractive index and Abbe number, respectively, of the image side positive lens element of the first lens unit, αi W is an incident angle of the principal ray onto the image sensor at the maximum image height at a wide-angle limit) are satisfied.

The electrodes (7) and the contact zones (15) are structured in a film of a transparent conductive oxide (TCO), deposited on a transparent support (1) possibly coated with an intermediate film (3), while being separated by dielectric spaces (9) formed by nano fissures (11) obtained by UV radiation and passing through the TCO film. A protective film (13) can coat the electrodes (7) and the dielectric spaces (9).

A zoom lens system comprising a first lens unit of negative power, a second lens unit of positive power and a third lens unit of positive power, wherein in zooming, the lens units move respectively along an optical axis so that an interval of first lens unit and second lens unit decreases while an interval of second lens unit and third lens unit changes with variable magnification, the first lens unit comprises one object side negative lens element and one image side positive lens element, which have an aspheric surface, and the conditions: n12>1.88, ν12<26 and 3.0<f3 / fW<5.5 (ωW>30, n12 and ν12 are refractive index and Abbe number, respectively, of the image side positive lens element of the first lens unit, f3 is a composite focal length of the third lens unit, fW is a focal length of the entire zoom lens system at a wide-angle limit) are satisfied.

A zoom lens system comprising a first lens unit of negative power, a second lens unit of positive power and a third lens unit of positive power, wherein in zooming, the lens units move respectively along an optical axis so that an interval of first lens unit and second lens unit decreases while an interval of second lens unit and third lens unit changes with variable magnification, the first lens unit comprises one object side negative lens element and one image side positive lens element, which have an aspheric surface, and the conditions: n12>1. 88, v12<26 and 5.0<alphaiW<20.0 (omegaW>30, n12 and v12 are refractive index and Abbe number, respectively, of the image side positive lens element of the first lens unit, alphai W is an incident angle of the principal ray onto the image sensor at the maximum image height at a wide-angle limit) are satisfied.

A projection type image display apparatus having an image display element outputting an image ray, a projection lens apparatus for performing overhead projection of the image ray from the image display element, the projection lens apparatus having a plurality of lens elements, a reflection mirror reflecting the image ray from the projection lens apparatus, and a screen on which the image ray reflected by the reflection mirror is projected. An optical axis of the projection lens apparatus is decentered from a center of the screen.

A directional valve for controlling an actuator by means of pressurized medium, including: a spool fitted to move axially inside the directional valve; a first position of the spool, in which the spool tends to be set; and a second position of the spool, to which the spool can be moved by a pilot control force. Additionally, the directional valve includes a metering orifice placed in the pressure port or in the first work port or in the second work port or in the tank port, and across which a pressure difference is effective. The spool further includes a second position, to which the spool can be moved by a pilot control force. When the spool is in at least the second position, the directional valve is fitted to generate a compensating force proportional to said pressure difference, to move the spool to compensate for the flow.

A method of compensating for eddy currents induced by the switching on and off magnetic fields in gradient coils in NMR imaging apparatuses, which method includes at least one compensation cycle including the steps of performing at least one detection of the magnetic field generated by the current flowing in a gradient coil, i.e., a gradient field; extrapolating the course of the effectively generated gradient field from the data of said at least one detection; generating a gradient fields excitation current compensating the eddy current effects on the gradient fields on the basis of the comparison of the effectively generated gradient fields and of the target gradient field.

The present invention is directed to high magnification compact zoom lenses that are reduced in diameter of groups of lens pieces closer to the imaging plane to provide downsized lightweight zoom lenses of magnification as high as 20 diameters, with an image stabilizer or vibration compensating mechanism being also reduced in dimensions. An exemplary improved high magnification zoom lens has four groups of lens pieces, namely, the first or leading lens group G1 of positive refractivity in the foremost position closer to the subject, the second lens group G2 of negative refractivity, the third lens group G3 of positive refractivity, and the fourth lens group G4 of positive refractivity in the rearmost position closer to the imaging plane, all arranged in this order. In displacing the entire lens optics of the zoom lens from the wide-angle end to the telephoto end, the second lens group G2 are moved toward the imaging plane and the fourth lens group G4 are moved to compensate for a varied position of the resultant image while the first and third lens groups, G1 and G3, have their respective positions fixed along the optical axis. The zoom lens satisfies the requirements as defined in the following formulae: f3 / f4>2.0 and v4>65 where f3 is a focal length of the third lens group G3, f4 is the focal length of the fourth lens group, v4 is an average of Abbe contrasts of all the convex lens pieces in the fourth lens group G4.

The invention relates to an engine test propellant supply low frequency ripple suppression method and system. Accurate helium injection is performed on the propellant supply pipeline, the inherent frequency of the propellant supply system is changed through gas mixing, and the ripple of the propellant can be adjusted through accurate control of the injection gas volume, the gas distribution and the injection gas form and the coupling situation of the propellant supply system and the engine can be reduced. With application of the method, the propellant supply ripple can be reduced, the propellant supply stability can be enhanced and thus the stability of the whole engine pump system can be enhanced. The method and the system are applied to the engine test.

A directional valve for controlling an actuator by means of pressurized medium, including: a spool fitted to move axially inside the directional valve; a first position of the spool, in which the spool tends to be set; and a second position of the spool, to which the spool can be moved by a pilot control force. Additionally, the directional valve includes a metering orifice placed in the pressure port or in the first work port or in the second work port or in the tank port, and across which a pressure difference is effective. The spool further includes a second position, to which the spool can be moved by a pilot control force. When the spool is in at least the second position, the directional valve is fitted to generate a compensating force proportional to said pressure difference, to move the spool to compensate for the flow.

The invention discloses an ultrahigh pressure metal hose with an external strengthened layer. The ultrahigh pressure metal hose comprises a flange, a connecting pipe, a corrugated pipe, steel wires, metal mesh sleeves and a hose. The corrugated pipe is sequentially in sealed connection with the connecting pipe and the flange. The steel wire is wound into the trough of the corrugated pipe until leveling with the crest, the metal mesh sleeves are axially sleeved along all crests of the corrugated pipe, at least one layer of steel wire and at least one layer of metal mesh sleeve are alternatively arranged on the layer of metal mesh sleeve, the steel wire is wound to form the circumferential strengthened layer of the corrugated pipe, and the metal mesh sleeve forms the axial strengthened layer of the corrugated pipe. In order to realize integrated connection, the end parts of the metal mesh sleeve and the steel wire uniformly extend to the outer wall of the middle section of the connecting pipe, are gathered and bound up with a jacket and then are fixedly connected uniformly. According to the invention, the strengthened layer is additionally arranged on a conventional corrugated pipe, the structure is simple, multiplication of bearing capability and temperature resistance can be realized, and the requirements of working conditions of ultrahigh pressure and extreme temperature resistance can be met. In addition, the strengthened layers are all of a flexible structure, thus having little influence on the flexible compensation capability of the corrugated pipe.

A zoom lens system comprising a first lens unit having negative power, a second lens unit having positive power and a third lens unit having positive power, wherein in zooming from a wide-angle limit to a telephoto limit, the lens units move respectively along an optical axis in such a manner that an interval between the first lens unit and the second lens unit decreases while an interval between the second lens unit and the third lens unit changes so that variable magnification is achieved, the first lens unit comprises one object side negative lens element and one image side positive lens element with a convex surface facing the object side, which have an aspheric surface, and the conditions: n12>1.88 and ν12<26 (n12 and ν12 are refractive index and Abbe number, respectively, of the image side positive lens element of the first lens unit) are satisfied.

The invention relates to a self-locking type shutter device with high impact resistance, which includes an image sensor support, separation blades, acting arms and driving motors, wherein a photosensitive window is arranged at the middle part of the image sensor support; the separation blades are provided with sliding grooves, and can be rotationally mounted on the image sensor support through separation blade shafts, and the separation blades can completely shield the photosensitive window when closed, and are within the range of the image sensor support when opened normally on two sides of the photosensitive window; the acting arms are rotationally mounted on the image sensor support through rotating shafts, and are provided with convex columns which are arranged at one end of each acting arm respectively, pass through the sliding grooves of the separation blades, and can slide along the sliding grooves; the connection lines between the centers of the rotating shafts of the acting arms and the axes of the convex columns are orthogonally intersected with the groove lines of the sliding grooves of the separation blades, or form included angles slight larger than 90 degrees; and the driving motors are mounted on the image sensor support, and are connected with the acting arms for driving the acting arms. The self-locking type shutter device with high impact resistance has the characteristics of self-locking, high impact resistance, high overload resistance and the like in the normally-open state, and capability of realizing non-uniformity correction or exposure control of an image sensor focal plane in the closed state, so that the opening and closing time can be regulated and controlled conveniently according to requirements, the volume is small and the structure is compact.

An electron microscopy system and an electron microscopy method for detection of time dependencies of secondary electrons generated by primary electrons is provided, in which the primary electron pulses are directed onto a sample surface and electrons emanating from the sample surface are detected, time resolved. To this end the system comprises in particular a cavity resonator. A cavity resonator can also be used to reduce aberrations of focusing lenses.

An internal combustion engine control device is configured to take a fuel property into account when compensating for torque decline that occurs when a prescribed combustion control mode is executed. The internal combustion engine control device is configured to calculate a first modification coefficient designed to modify a first torque correction coefficient corresponding to a air-fuel ratio based on the specific gravity of the fuel, a second modification coefficient designed to modify a second torque correction coefficient corresponding to a working gas quantity based on the specific gravity of the fuel, and a third modification coefficient designed to modify a third torque correction coefficient corresponding to a fuel injection timing based on an aromatic component content ratio of the fuel. The internal combustion engine control device is then configured to multiply the first, second and third modification coefficients together to calculate a modification coefficient for modifying a torque correction value.

A zoom lens system comprising a first lens unit having negative power, a second lens unit having positive power and a third lens unit having positive power, wherein in zooming from a wide-angle limit to a telephoto limit, the lens units move respectively along an optical axis in such a manner that an interval between the first lens unit and the second lens unit decreases while an interval between the second lens unit and the third lens unit changes so that variable magnification is achieved, the first lens unit comprises one object side negative lens element and one image side positive lens element with a convex surface facing the object side, which have an aspheric surface, and the conditions: n12>1.88 and ν12<26 (n12 and ν12 are refractive index and Abbe number, respectively, of the image side positive lens element of the first lens unit) are satisfied.

A closed-type petroleum and petrochemical flare horizontal pipeline deformation compensation system based on a rotary compensator is characterized in that it includes at least one closed rotary compensator installed on the flare horizontal pipeline, and the closed rotary compensator consists of four rotary compensators The compensator (3) is composed of two vertically installed tee pipes (2), the upper connecting pipe (4) and the lower connecting pipe (5). The corresponding ports of the horizontal torch pipe (1) of the same straight line are connected, and the two vertical nozzles of each three-way pipe (2) are respectively connected with a rotary compensator (3), and the upper ends of the two three-way pipes (2) The rotary compensator (3) is connected through the upper connecting pipe (4) to form a pipeline for the circulation of the gaseous medium, and the rotary compensator (3) located at the lower end of the two tee pipes (2) is connected through the lower connecting pipe (5) to form a pipeline for the circulation of the gaseous medium. Pipelines for the flow of liquid media. The invention has the advantages of long compensation distance, small investment, safety and reliability.

The invention belongs to the field of aero-engine external pipeline design, and particularly relates to a pipeline connecting device with multidirectional displacement compensation capability. The pipeline connecting device comprises a first pipeline, wherein one end of the first pipeline is a columnar port, the outer wall is an outer cylindrical surface, and the tail end protrudes to form a flange; a second pipeline, wherein one end of the second pipeline is a spherical port; and a connecting pipe which comprises a first sleeve opening and a second sleeve opening, wherein the first sleeve opening sleeves the first pipeline, an elastic O-shaped ring is arranged between the first sleeve opening and the outer cylindrical surface, the second sleeve opening sleeves the second pipeline, the position, corresponding to the spherical port of the second pipeline, of the second sleeve opening is in a horn shape, and a first connecting piece and the connecting pipe are matched in shape to clamp the elastic O- shaped ring. Through the integrated design of axial compensation and angular compensation, the compensation requirements of the pipeline in all directions can be met while the sealing performance is guaranteed; and the pipeline connecting device has the advantages of a simple structure, small occupied space and strong compensation capability.

The invention discloses a petroleum and petrochemical torch horizontal pipeline deformation compensation method and a petroleum and petrochemical torch horizontal pipeline deformation compensation device based on a rotary compensator. The method is characterized by comprising the following steps of: firstly, connecting two pipe ends at a corner of a torch horizontal pipeline or pipe ends of two parallel pipelines with a three-way pipe respectively; secondly, connecting two vertical straight ends of each three-way pipe with rotary compensators; and finally, communicating the rotary compensators at upper ends of two three-way pipes through an upper communicating pipe so as to circulate a gaseous medium, and communicating the rotary compensators at lower ends of the two three-way pipes through a lower communicating pipe so as to circulate a liquid medium; therefore, the whole petroleum and petrochemical torch horizontal pipeline is subjected to deformation compensation in a length direction, and the circulation of gaseous and liquid phase media is not influenced. The compensation system consists of an enclosed compensation system and a branch compensation system, which consist of three-way pipes and rotary compensators. The system has the advantages of long compensation distance, low investment, safety and reliability.

The invention discloses a single-phase PAPF circuit modeling method considering coupling relation, which comprises the following steps: obtaining the value of DC side voltage of the single-phase PAPFcircuit; Acquiring a value of the AC side inductance of the single-phase PAPF circuit; Obtaining a value of the DC side capacitance of the single-phase PAPF circuit; Based on the value of the DC-sidevoltage, modeling the value of the AC-side inductance and the value of the DC-side capacitance. By reasonably choosing the parameters of single-phase PAPF circuit, the compensation requirements underall conditions of a particular load can be met, and the form is simple, the calculation is convenient, the versatility is strong, the equipment cost can be reduced, the compensation effect can be improved and the stability of the whole system can be improved. At the same time, aiming at the coupling relationship between the parameters of the main circuit, starting from the actual operating conditions, through the MATLAB three-dimensional modeling and data optimization, a clear parameter selection method is obtained. The simulation and experimental results verify the correctness and feasibilityof the method.

A zoom lens system comprising a first lens unit having negative power, a second lens unit having positive power and a third lens unit having positive power, wherein in zooming from a wide-angle limit to a telephoto limit, the lens units move respectively along an optical axis in such a manner that an interval between the first lens unit and the second lens unit decreases while an interval between the second lens unit and the third lens unit changes so that variable magnification is achieved, the first lens unit comprises one object side negative lens element and one image side positive lens element with a convex surface facing the object side, which have an aspheric surface, and the conditions: n12>1.88 and ν12<26 (n12 and ν12 are refractive index and Abbe number, respectively, of the image side positive lens element of the first lens unit) are satisfied.