摘要:
In a vacuum system a baffle-valve acts first as a baffle to reduce the backstreaming of a diffusion pump fluid into the main vacuum chamber being evacuated and secondly it can be used as a valve to provide complete isolation between the diffusion pump and the vacuum chamber. This enables the chamber to be open for service work while the diffusion pump is kept operating for rapid pump down. The foregoing dual use of the baffle/valve increases pumping efficiency because of higher conductance.
摘要:
In a mass spectrometer a focusing ion lens system effectively separates charged from neutral particles by forming a potential well along the axis from the ionizing region to the mass analyzer by the use of a gridded lens system. The grids by the use of a high-low voltage combination form the potential well while at the same time allowing nonselected neutral particles to pass through the grid. Thus, the system is very effective for relatively high pressure ionizing regions where a large amount of neutral particles are generated.
摘要:
Apparatus and method for programming the ion energy of ions being analyzed by a quadruple mass spectrometer where the axis potential applied to the quadruple rods is caused to vary in synchronism with a mass scan in order that the ions of each mass being analyzed may transit the quadruple with the most advantageous energy for proper analysis (that is, with substantially equal velocities) and the application of the ion scan voltage will not distort the fringing field at the entrance to the quadrupole.
摘要:
A method of selecting a material for the construction of a multipole mass filter that is temperature stable or in other words, the R.sub.o parameter remains invariant with change in temperature. The coefficients of thermal expansion of the quadrupole rods and mounting structure are chosen so that a constant ratio of the two is provided which in turn is determined by the geometrical construction of the filter.
摘要:
A method and system for performing memory optimization is described. In one embodiment, a method includes receiving a plurality of read/write requests, wherein at least a portion of the read/write requests are assigned respective identifiers for associating related requests of the read/write requests. Arrival times of the read/write requests assigned to each of the identifiers is measured and predicted arrival times of future read/write requests assigned to each of the identifiers is determined. A real-time schedule of memory requests is created using the arrival times of the read/write requests and the predicted arrival times. The method includes using the real-time schedule to determine idle periods and performing opportunistic functions in the memory during the idle periods, including performing at least one of garbage collection or translation cache pre-fetch.
摘要:
A system corrects differential focus arising from keystone errors in projection displays. An electrically variable optical element may correct the differential focus of the projected image. The focus of the image may be corrected so that opposed portions of the image, otherwise subject to keystone errors, are both correctly focused.
摘要:
A luminosity channel may be provided in an electro-optic projection display by beam splitting the incident light source into first and second polarization beams. One polarization beam may be used to illuminate the three modulators for the three primary color channels. The other beam may be utilized to illuminate a white light modulator which provides a luminosity channel. The two beams may be recombined to produce the final image. As a result, in some embodiments, higher resolution, or wider color gamut, and better image quality may be achieved without unduly effecting the light efficiency of the display.
摘要:
Substituted pyrrole, angiotensin-II receptor antagonists and pharmaceutically acceptable salts thereof are useful for treating glaucoma and ocular hypertension.
摘要:
A full face smoke mask having a detachable air tank for dispensing air to the mask in smoke emergencies. A valve on the air tank is opened automatically when the tank is threaded to a rigid fitting carried on the mask. The valve body is equipped with a rupture film which ruptures to vent excessive pressure in the dispensing system.
摘要:
A BOAT HITCHING DEVICE AND CARRYING SYSTEM used for a carrying device for boats. This device is used in and around diving deck of the boat. The device is comprised essentially of two main parts: 1. A case which features a way to fasten the device to the boat; a way to rotate a receptor from a stored position and then securely retain the receptor in an essentially horizontal “use” position; a manner to pivot and securely retain the receptor in the use position; and features to provide a safe, flat deck when the device is in storage and 2. a receptor with a hub to pivotally yet securely connect to the case; a receiver structure to receive the various carrying accessories; and a way to securely retain the accessories. These devices are designed for Original Equipment or After Market offerings.