104 results about "Radius of gyration" patented technology

A polyacrylonitrile-based polymer, containing a polymer of which main component is acrylonitrile, which satisfies at least one kind requirement selected from the following [a] to [d].[a] Z-average molecular weight (Mz) determined by gel-permeation chromatograph is 800,000 to 6,000,000 and degree of polydispersity (Mz / Mw) (Mw denotes weight average molecular weight) is 3.0 to 10.0.[b] Z+1-average molecular weight (Mz+1) determined by GPC method is 3,000,000 to 10,000,000 and degree of polydispersity (Mz+1 / Mw) is 6.0 to 25.0.[c] Mzm determined by gel-permeation chromatograph multi-angle laserlight scattering photometry is 400,000 to 1,000,000 and degree of polydispersity (Mzm / Mwm) is 3.0 to 10.0.[d] Z-average radius of gyration (Rz) determined by gel-permeation chromatograph multi-angle laserlight scattering photometry is 25 to 45 nm and its ratio to weight average radius of gyration (Rz / Rw) is 1.3 to 2.5.

The present invention provides a method for planning a path for an autonomous walking humanoid robot that takes an autonomous walking step using environment map information, the method comprising: an initialization step of initializing path input information of the autonomous walking humanoid robot using origin information, destination information, and the environment map information; an input information conversion step of forming a virtual robot including information on the virtual robot obtained by considering the radius and the radius of gyration of the autonomous walking humanoid robot based on the initialized path input information; a path generation step of generating a path of the virtual robot using the virtual robot information, the origin information S, the destination information G, and the environment map information; and an output information conversion step of converting the path of the autonomous walking humanoid robot based on the virtual robot path generated in the path generation step.

An improved high impact metal clubhead with a unique reinforced composite face wall, increased radius of gyration, and a positive lift air foil surface contour. The composite face wall includes an impact supporting wall rigidified by a pattern of integrally cast reinforcing bars that extend forwardly, rather than rearwardly, from the supporting wall. The reinforced supporting wall is covered by a very hard plastic ball striking insert that is cast in situ over the supporting wall. The increase in radius of gyration is accomplished by extending the heel and toe portions of the clubhead along the face wall further from the geometric center of the head, beyond present day parameters for high impact clubheads. And the positive lift is effected by contouring the top wall of the clubhead downwardly and rearwardly from the base wall more severely almost to the plane of the sole plate, and flattening the rear wall so it is almost co-planar with the sole plate. This configuration results in the top wall being equal to or greater in length than the combined length of the sole plate and rear wall in a vertical plane extending through the clubhead along the target line. The laws of continuity of matter and the air foil shape of the top wall eliminate the negative lift or drag in today's "woods" and offer the possibility of some positive lift to increase ball overspin.

A balance wheel having a thermally adjustable moment of inertia is described. In one aspect, the balance wheel includes radially movable compensation portions formed of shape memory material exhibiting a two-way memory effect. The radius of gyration of the balance wheel is therefore adjustable with temperature to compensate for thermoelastic effects in a balance spring attached to the balance wheel. In another aspect, a thermally stable balance wheel includes dynamically adjusting appendages whose expansion or contraction with temperature relative to the balance wheel cause change in its moment of inertia. The invention can compensate for both ‘normal’ and ‘abnormal’ thermoelastic spring behaviour.

In order to improve vibration absorbency and impact absorbency, the seat structure includes a swing member provided in a manner to be able to swing at least back and forth on a rear frame member positioned around the rear of a seat cushion, a pelvis supporting member connected to the swing member at the vicinity of the lower portion of the pelvis supporting member and disposed behind the pelvis of a seated person, and coil springs as an elastic member to support the pelvis supporting member biasing in the direction pushing forwards in a normal seating state. Accordingly, vibration inputted from the seat back side and as if patting on the back of the human body can be absorbed by the pelvis supporting member supported elastically. Besides, since the pelvis supporting member is connected to the rear frame member via the swing member, since pivoting movement in the back-and-forth direction of the pelvis supporting member is performed with a connecting portion of the swing member and the rear frame member as the center, and the radius of gyration is large, the vicinity of the lower portion of the pelvis supporting member never presses the pelvis.

A permanent magnetic adsorption wheel-type wall-climbing robot belongs to the field of minitype robot technology and comprises three groups of permanent magnetic adsorption wall-climbing units with the same structures and a steering unit, wherein the permanent magnetic adsorption wall-climbing units are vertically arranged on the steering unit respectively; and the three groups of the permanent magnetic adsorption wall-climbing units are in parallel. The robot has extremely great advantages when moving in narrow pipelines, can rotate horizontally, vertically or around the pipeline, and can carry out shifting operation between pipelines of different structures. In the steering unit of the robot, a set of reducing gears is designed to realize the omnidirectional movement (without radius of gyration) of the minitype wall-climb robot, thus leading the robot to have extremely high flexibility.

A corona resistant thermoplastic composition comprises about 15 to about 85 wt % of a thermoplastic resin comprising polyarylene ether and polyarylene sulfide; about 10 to about 30 wt % glass fibers; and about 5 to about 51 wt % of a mineral filler having an average radius of gyration effective to produce a corona resistance of greater than 200 hours when continuously subjected to a voltage of 5000 volts and wherein the weight percents are based on total composition. The compositions find particular utility in automotive applications, for example in under-the-hood applications such as ignition coil cases, as copier components, circuit breaker components, electrical switches, insulators, electronic encapsulants, and other applications requiring enhanced corona resistance.

Wave energy converter efficiency is improved by dynamic tuning over periods from 5 to 15 seconds. Tuning methods are: for heaving, mass is varied by locking and unlocking neutrally buoyant masses or by trapping and releasing seawater; for surging, water-plane area is varied by force; for rotational variants of heaving and surging and for pitching, the radius of gyration is varied. Fixed mass is reduced by using materials and structures with high ratios of strength to weight. Fixed added mass is reduced by streamlining, by constant radius body profiles and by keeping moving structures out of the water. Added mass is varied continuously by using variable angle fins: effectiveness is enhanced by enclosure. In pitching, wave-bridging is addressed by limiting length, using locking and unlocking segments of the floating body or by using gravity as the restoring force. Solutions are described for heaving, surging, pitching and wave-following.

Compositions are disclosed herein comprising at least one dextran ether compound that comprises uncharged, anionic, and / or cationic organic groups. The degree of substitution of one or more dextran ether compounds is about 0.0025 to about 3.0. Dextran from which the disclosed ether compounds can be derived can have a weight-average molecular weight of about 50-200 million Daltons and / or a z-average radius of gyration of about 200-280 nm. Also disclosed are methods of producing dextran ether compounds, as well as methods of using these ether compounds in various applications.

The invention discloses a turning radius adjusting mechanism of paddles of a vertical axis wind turbine. The paddles are distributed on the same circumference, the turning radius adjusting mechanism further comprises a power component and actuating components, the power component consists of a power component body and a vertical tube component, fan hub shells are symmetrically disposed at the upper end and the lower end of the vertical tube component, the power component body is disposed in the vertical tube component, a power device in the power component body can drive two vertical output shafts to rotate, the vertical output shafts are arranged on the upper side and the lower side of the power device respectively, one end, which is far away from the power device, of each of the two vertical output shafts extends into the corresponding fan hub shell, driving bevel gears are sleeved at both extending ends of the two vertical output shafts, and the actuating components are symmetrically arranged on the two fan hub shells and are horizontally disposed. By the aid of the turning radius adjusting mechanism, the turning radius of each paddle can be adjusted as needed, the turning radius adjusting mechanism is favorable for improving the stability of generated power of the vertical axis wind turbine, safety of the vertical axis wind turbine with high load and applicability of the vertical axis wind turbine to conditions with different wind speeds and expanding application range of the wind speed, and the shortcoming that the turning radius of a paddle cannot be adjusted by a traditional structure is overcome. In addition, the turning radius adjusting mechanism is simple in structure, convenient in manufacture and applicable to large-scale popularization and application in the field of vertical axis wind turbines, and has excellent technologic and economic benefits.

The invention discloses a rough machining method suitable for helical surfaces of various hourglass worms, belonging to a method for machining hourglass worms. The invention adopts the technical scheme that a hourglass worm 1, a turning tool 2, a turning tool marking line 3, a worm axial line 4, a turning tool revolving axial line 5 and a common perpendicular thereof 6 are comprised, wherein the worm axial line and the turning tool revolving axial line are vertically interlaced, perpendicular foots are respectively O and O', the turning tool marking line 3 passing through the point O', a leftcutter point N and a right cutter point M are arranged in a plane determined by the worm axial line 4 and the common perpendicular 6, wherein the revolving radius of the left cutter point N and the revolving radius of the right cutter point M are Rd. According to a principle of hourglass worm forming, an annular surface with the radius of Rd and a series of corresponding points on a left helical surface and a right helical surface at different axial section parts when the corresponding center distance of the same helical groove of the hourglass worm 1 is OO' are obtained. A cutter point between the cutter points N and the cutter point M is used for turning the part on the current annular surface of the same helical groove of the hourglass worm 1 between an engaging-in end and an engaging-out end, and turning whole body of the same helical groove along with the continuous reduction of the center distance OO'. The invention solves the problem of hourglass worm grinding allowance homogenization.

The invention relates to a polyacrylonitrile-based polymer, containing a polymer of which main component is acrylonitrile, which satisfies at least one kind requirement selected from the following [a] to [d]. [a] Z-average molecular weight (Mz) determined by gel-permeation chromatograph is 800,000 to 6,000,000 and degree of polydispersity (Mz / Mw) (Mw denotes weight average molecular weight) is 3.0 to 10.0. [b] Z+1-average molecular weight (Mz+1) determined by GPC method is 3,000,000 to 10,000,000 and degree of polydispersity (Mz+1 / Mw) is 6.0 to 25.0. [c] Mzm determined by gel-permeation chromatograph[space]multi-angle laserlight scattering photometry is 400,000 to 1,000,000 and degree of polydispersity (Mzm / Mwm) is 3.0 to 10.0. [d] Z-average radius of gyration (Rz) determined by gel-permeation chromatograph[space]multi-angle laserlight scattering photometry is 25 to 45 nm and its ratio to weight average radius of gyration (Rz / Rw) is 1.3 to 2.5.

The present invention is directed to a golf ball comprising a soft core and a hard cover to produce a resulting golf ball having a reduced spin rate. In this regard, a core is provided and metal particles, or other heavy weight filler materials, are included in the cover compositions. This results in a golf ball exhibiting enhanced perimeter weighting. Preferably, the particles are included in a relatively thick inner cover layer (or mantle) of a solid, three-piece multi-layered golf ball. In another preferred version, one or more patterns of weighting material are incorporated in the ball, and most preferably along the outer periphery of the ball so that the pattern is visible along the ball's exterior. The size and weight of the core is reduced in order to produce an overall golf ball which meets, or is less than, the 1.62 ounce maximum weight limitation specified by the United States Golf Association. It has been found that the present invention produces a golf ball with an increased moment of inertia and / or a greater radius of gyration and thus generates lower spin. The golf ball of the present invention may also utilize an enlarged diameter which serves to further reduce spin rate. The resulting golf ball exhibits properties of reduced spin without sacrificing durability, playability and resilience.

Mediates the compressor the vortex plate, in moves, on the static vortex plate separately has two each one independent vortex line tooth. Four vortex line teeth mutually mesh form four independent crescent moons shapes compression cavity, the gas divide into four groups from the air inlet to enter four to be near air cavity carry on the compression, finally compiles, by identical air vent discharging machine outside. This invention under the same vortex plate external dimensions and the same main axle rotational speed, has increased air input, increased the vortex plate center section spatial use factor, reduced the crank radius of gyration, reduced has moved, the static vortex plate relative movement line speed, caused to move the vortex plate stress to be even, reduced the entire machine vibration.

The invention discloses an expansion scraper blade plate-type conveyer, two ends of a frame are respectively mounted with a head pulley (7) and a tail pulley (1), a conveying chain (2) rounds the headpulley (7) and the tail pulley (1), supporting of the conveying chain (2) is located on a guide rail (4) of the frame, a lath (3) is fixed on the conveying chain (2), the expansion scraper blade is arranged on the conveying chain (2) and comprises a scraper blade (5), guide plates (9), connecting plates (13) and springs (14), a group of guide plates (9) are mounted on the conveying chain (2) at intervals, the scraper blade (5) is arranged among the guide plates (9), the connecting plates (13) are mounted at two sides of the scraper blade (5) in symmetry, at least one end of the two springs (14) is connected to the connecting plates (13), and the other end of each spring (14) is connected to the guide plates (9) and the scraper blade (5). The conveyer is used for conveying materials in bags at a large inclination angle, and is convenient to shift in a warehouse by smaller radius of gyration.

A system and method for analyzing data from a gel permeation chromatography (GPC) or size exclusion chromatography (SEC) system fro determining a polymeric sample's radius of gyration. Data from two or more detectors is used with a least-squares minimization fit. A novel method includes the simultaneous determination of a sample's radius of gyration using data from a light scattering detector that collects data from at least two incident angles. Detectors within the inventive method include a multi-angle light scattering (LS) detector, viscometer (V) and a refractive index (RI) detector.

The invention discloses an indexable cutting tip for a face milling process,, comprising an upper surface, a bottom surface and a cutting tip body surrounded by the two end faces connecting the upper and bottom surfaces and the two side faces. The center of the cutting tip body is equipped with a cutting tip center hole for installing compression screw. An intersection line of the upper and the two side faces is formed to a couple of main cutting edge which is connected by at least three curvilinear cutting edges heaving outward relative to the cutting tip central hole. Each section of the curvilinear cutting edge is formed by crossing the surface and the relative cutting wheeling cylindrical surface respectively. And the two adjacent curvilinear cutting edges are connected by smooth transition. The indexable cutting tip for a face milling process has the advantages of being applied to many kinds of tools with cutting radius of gyration, guaranteeing the precision of the face milling processing and improving the linking cutter marks.

The invention provides an artillery rotating radius and pitch radius detecting device and method based on a laser radar, and belongs to the field of laser measurement. On the basis of a laser radar technology, the artillery rotating radius and the pitch radius are indirectly measured by combining the artillery rotating radius and pitch radius detecting device based on the laser radar and using the similar triangle principle. The device comprises a rotating hand wheel, a lead screw, a spring ring, a sleeve, a positioning block, a conical body block, a laser radar and a plug gauge, wherein the rotating hand wheel is connected with the lead screw, the lead screw is arranged inside the sleeve and is coaxial with the sleeve, the positioning block is positioned at the outer side of the sleeve, the positioning block is connected with the sleeve through the spring ring, and the laser radar and the plug gauge are independent devices and are matched with the positioning block for completing the detection. The device and the method provided by the invention have the advantages that the rotating radius and the pitch radius of an artillery can be precisely measured, the measuring precision can reach the micrometer level, the measuring precision is greatly improved, in addition, the structure of the detection device is simple, the measuring process is simple, the implementation is easy, and the detection capability and the shaping test level of the shooting range artillery can be improved.

The present invention is directed to a golf ball comprising a soft core and a hard cover to produce a resulting golf ball having a reduced spin rate. In this regard, a core is provided and metal particles, or other heavy weight filler materials, are included in the cover compositions. This results in a golf ball exhibiting enhanced perimeter weighting. Preferably, the particles are included in a relatively thick inner cover layer (or mantle) of a solid, three-piece multi-layered golf ball. In another preferred version, one or more patterns of weighting material are incorporated in the ball, and most preferably along the outer periphery of the ball so that the pattern is visible along the ball's exterior. The size and weight of the core is reduced in order to produce an overall golf ball which meets, or is less than, the 1.62 ounce maximum weight limitation specified by the United States Golf Association. It has been found that the present invention produces a golf ball with an increased moment of inertia and / or a greater radius of gyration and thus generates lower spin. The golf ball of the present invention may also utilize an enlarged diameter which serves to further reduce spin rate. The resulting golf ball exhibits properties of reduced spin without sacrificing durability, playability and resilience.

The invention relates to a machine processing method, in particular to a processing method of an engine cylinder cover airflow passage port. A cylinder cover with a airflow passage is processed and formed by the invention firstly; a valve seat is then assembled on the cylinder cover; an airflow passage throat is precisely processed by a cutting tool and the radius of gyration of the cutting track line is equal to the internal diameter at the opening at the top end of the valve seat, thus forming a smooth transition between the airflow passage throat and the opening at the top end of the valve seat. The invention avoids the disadvantageous problems of opening shrinkage, opening enlargement and dislocation, etc., at the communication location between the airflow passage throat and the opening at the top end of the valve seat, reduces the airflow resistance, leads the airflow to smoothly pass, does not affect the air inlet organization or air inlet quantity, thus ensuring the normal operation of the engine.

Shock absorbing structure (10, 10") for a vehicle comprising a side sill (2) comprising two chassis frame side members (4, 4") which together support a bumper beam (6, 6"), said shock absorbing structure comprising said bumper beam and an absorber (7, 7") interposed between each chassis frame side member and said bumper beam, said absorber having a working part (71) intended to deform in the event of an impact under the effect of a load below the limit load beyond which said chassis frame side member undergoes plastic deformation, said absorber being a section piece of which one end (72) is inserted inside the open end (5, 5") of said chassis frame side member and fixed thereto, characterized in that said absorber is an extruded aluminium alloy section piece of which the part not inserted inside said chassis frame side member or inside said bumper beam, which corresponds to said working part, has a length greater than 5 times its radius of gyration defined by formula (I), where I is the quadratic moment and S the cross-sectional area of said section piece, said cross section being such that, under the effect of a substantially frontal impact, said working part is able to deform in crumpling over a length such that the longitudinal crush distance is greater than 4 times said radius of gyration.

The invention relates to a method for milling screw thread on a non revolving body. The method of the invention includes the following steps: selecting a boring milling machining center lathe; clamping a work-piece on the boring milling machining center lathe; centering and recording the numerical value of the work-piece center; inputting on a work-piece frame of axes on a control panel, mounting a boring cutter to carry through a rough-finish boring screw thread bottom hole survival; demounting a boring cutter rod and mounting a suitable screw thread milling cutter; carrying through rough milling, semi-finish milling and finish milling on a screwed hole in turn until finishing by inputting a cutter radius compensation value Bn in a parameter list for a numerical control system on the control panel of the boring milling machining center lathe. And Bn is equal to R plus (R2 minus R1 minus A1 minus A2 minus...minus an); wherein, A1, A2...and An relates to the screw thread cutting depth for each time of milling, R relates to the radius of gyration of the screw thread milling cut, R2 relates to the radius of a survival screw thread and R1 relates to the radius of the bottom hole of the screw thread. The invention realizes the screw thread hole processing on non revolving bodes like a box body and a housing, etc., by the boring milling machining center lathe and has the advantages of high efficiency and high precision of the thread screw hole.

A high-altitude portable pipeline cutting machine relates to a pipeline cutting machine, which aims at the problems of the portable pipeline cutting machines, such as fussy mounting operation, heavy weight, low precision, high cost, large radius of gyration, and unsuitable use in working aloft. A hinged annular shelf is fixedly connected with a knife rest; a running mechanism seat is fixedly connected with the hinged annular shelf; a running mechanism cavity is arranged in the running mechanism seat; a chamber of the running mechanism cavity is arranged on the knife rest; two running mechanisms are respectively arranged in the running mechanism cavity and the chamber of the running mechanism cavity; a large-diameter crown arc groove and a small-diameter crown arc groove which are mutually communicated are arranged on the knife rest and are used as running cavities of a knife body frame; a knife body frame assembly is arranged in the running cavity of the knife body frame; the upper end of the knife body frame assembly is limited by a rotating cover arranged on the upper end surface of the knife rest; a locating staff gauge is fixedly arranged in a staff gauge mounting hole on the knife rest. The invention has light weight and small radius of gyration, good compatibility and low cost; moreover, the specification span of the pipeline which can be cut by the machine is large. Besides, the high-altitude portable pipeline cutting machine is suitable to be used for working aloft.

The present invention provides a method for planning a path for an autonomous walking humanoid robot that takes an autonomous walking step using environment map information, the method comprising: an initialization step of initializing path input information of the autonomous walking humanoid robot using origin information, destination information, and the environment map information; an input information conversion step of forming a virtual robot including information on the virtual robot obtained by considering the radius and the radius of gyration of the autonomous walking humanoid robot based on the initialized path input information; a path generation step of generating a path of the virtual robot using the virtual robot information, the origin information S, the destination information G, and the environment map information; and an output information conversion step of converting the path of the autonomous walking humanoid robot based on the virtual robot path generated in the path generation step.

A polymer nanocomposite includes a polymer matrix with nanoparticle assemblies and free polymer chains. The nanoparticle assemblies have a size larger than the radius of gyration of the free polymer chains. The polymer nanocomposite includes patterns having nanoparticle assemblies selectively migrated therein. A method of making the polymer nanocomposite includes positioning a patterned object on a nanoparticle assembly-containing film.

An input apparatus includes: a casing; a first acceleration detection section to detect a first acceleration value of the casing in a first direction; a first angle-related value detection section to detect a first angle-related value of the casing about an axis in a second direction; a radius gyration calculation section to calculate, based on the first acceleration value and first angle-related value, a first radius gyration of the casing about the axis in the second direction, the first radius gyration being a distance from a rotational center axis to the first acceleration detection section; and a pseudo velocity calculation section to generate a first pseudo radius related to a magnitude of the first radius gyration and calculate a first pseudo velocity value of the casing in the first direction by multiplying the first pseudo radius by a first angular velocity value obtained from the first angle-related value.

The magnetic toner contains magnetic toner particles containing a binder resin and a magnetic body, and inorganic fine particles present on the surface of the magnetic toner particles, wherein the inorganic fine particles present on the surface of the magnetic toner particles comprise metal oxide fine particles, wherein the metal oxide fine particles containing silica fine particles, and optionally containing titania fine particles and alumina fine particles, and a content of the silica fine particles being at least 85 mass % with respect to a total mass of the silica fine particles, the titania fine particles and the alumina fine particles. In addition, the coverage ratio of the magnetic toner particle surface by the inorganic fine particles resides in a prescribed range for this magnetic toner; the binder resin is a styrene resin; the weight-average molecular weight and radius of gyration of the magnetic toner reside in a prescribed relationship; and the viscosity of the magnetic toner at 110° C. resides in a prescribed range.