There exist three possible stationary motions of the sphere. The permanent rotations about its symmetric axis with the center of mass, lower or higher the center of sphere, and the regular precession with a definite nutation angle.
It gives the detail about an approach with which a virtual center of sphere can be machining datum, the way of dividing and clamping through two numerical-controlled axes. Meanwhile, the whole design scheme of a machining center for bolted node sphere's manufacturing and its control system as well as working circulation are illustrated. All those provide a new processing technology and a high precision and efficiency equipment for machining of these parts.
In this paper we also provide a formula for computing the offset caused by non-coincidence between the telescope slewing center and the dome spherical center,and make further analysis on the offset.
By use of function counter and suitable light path calculating fomular, the light-path calculation for a large number of spherical center crossimages(usually aslo called "aeroplane" image) in drawing up lens-gluing technique and lens edging, centering and cylindrical-turning technique is accomplished fast and simply, so as to determine the position dimension parametres of cross image used for centering.
Meanwhile, having studied characters of gnomonic projection it has been gotten that any great circle of spherical surface will be projected into straight line in gnomonic projection.
During the 108-hour culture of neurosphere, cell growth of the neurospheres was inhibited when the concentrations of glucose and glutamine decreased to 36.11 mmol/L and 1.33 mmol/L, respectively, and the average radii of neurospheres reached about 50 μrn.
The experimental assembly is a depleted uranium sphere with φ 600 mm,which has a source cavity with φ 80 mm at the center of the sphere,that being made of seven depleted uranium shells. The total weight of the assembly is about 2 1 t .
In 10mm spherical space near the center of solenoid, the nonuniformity of magnetic induction strength is less than 1%. The pulsed magnet accords with the demand of design.
One novel static property, the projected area of chelate atoms onto a virtual surface centered on the metal ion (gnomonic projection), was found to give an effective measure of how well the chelate atoms use the free space around the metal ion.
This paper gives a generalized statement of the Bremmer[1] theory in the case that the medium and the incident wave are of general form (it is called the local principle of the process of wave motion) and proves it schematically. The Bremmer serieses of three concrete cases are deduced in a way similar to that used by Bremmer. These are:
This paper deals with the theory of the movement of ball rotor in a fuze innon-inertial coordinated system and studies the differential equations of move-ment of ball rotor and the caculation of its starting time. The deviation of thecentre of ball rotor from the axis of projectile is discussed too. This paper maybe used as reference for fuze designer. This thesis contains four parts: 1. The analysis of movement of ball rotor in non-inertial system; 2. The study of the movement of ball rotor in non-inertial...
The ball rotor, as an arming and safety device has found wide applications in the fuzes for small caliber projectiles used in antiaircraft, aircraft mounted and ship-based guns as well as for recoilless gun projectiles. Its main advantages are simple in structure, easy to manufacture and small in volume. By means of this device we can get an arming delay if the rotational speed of projectiles is low (e. g. ω≈9000rpm). The problem of arming delay may be easily solved if the ball rotor device is combined with...
球心
center of sphere
查询“球心”译词为用户自定义的双语例句
相关查询:
2008 CNKI－中国知网