摘要:
A drive system for liquefied natural gas (LNG) refrigeration compressors in a LNG liquefaction plant. Each of three refrigeration compression strings include refrigeration compressors and a multi-shaft gas turbine capable of non-synchronous operation. The multi-shaft gas turbine is operationally connected to the refrigeration compressors and is configured to drive the one or more refrigeration compressors. The multi-shaft gas turbine uses its inherent speed turndown range to start the one or more refrigeration compressors from rest, bring the one or more refrigeration compressors up to an operating rotational speed, and adjust compressor operating points to maximize efficiency of the one or more refrigeration compressors, without assistance from electrical motors with drive-through capability and variable frequency drives.
摘要:
The present invention provides a system and method to quarantine in the storage operating system and configuration information in which the storage operating system is stored in a designated partition on a removable nonvolatile memory device, such as a compact flash or a personal computer (PC) card that is interfaced with a motherboard of a filer system server. By providing for separate partitions, a failure or error arising during an upgrade to the storage operating system will not corrupt the other partitions.
摘要:
A remote learning system combines on-line service information and remote user information with a television signal designed to be received by students using multimedia personal computers. The combined signal is then transmitted to all of the students at their personal computers. At each personal computer, the received signal is separated into its component parts by a VBI modem for display or control on/of the personal computers. Each personal computer is capable of communicating back to a main server over a network such as a public telephone network. A broadcasting facility integrates the information transmitted over the network from a single student with the television signal.
摘要:
A weight-lifter bench is equipped with a removable body support pad having a multiplicity of body support cavities in the pad upper surface. These cavities mate with rear surfaces of the person's head and torso when the person is in a lithotomy position, e.g. when the person is performing a weight-lifting activity using the bench. The cavity surfaces conform to the body surface contours, such that essentially the entire rear surface of the person's torso is in contact with the pad. The pad provides a comfortable support surface, and an enhanced body support action that tends to minimize the potential risk for injury or fatigue.
摘要:
Tobacco cut filler is volume expanded using the DIET process and equipment. During depressurization of a pressure vessel containing a mixture of cut filler impregnated with liquid carbon dioxide, gaseous carbon dioxide is bubbled through the mixture to provide a mixture of decreased density and decreased integrity. Liquid water is introduced into the sublimator region of the equipment in order to act as a heat sink, causing tobacco cut filler in that region and related equipment components to not experience overly high exposure to heat. A vertically extending duct in the sublimator region has a relatively large inner diameter so as to allow adequate residence time of the tobacco cut filler in the expansion region. A spray of water applied to the expanded tobacco cut filler and atmosphere in the post expansion region of the DIET equipment moistens the cut filler and reduces the temperature experienced thereby.
摘要:
The present invention concerns an apparatus and process for producing an improved extruded plastic material product which consists of an inner foamed thermoplastic cellular core and an outer non-porous thermoplastic skin extending along at least one side of the core. In the process, a foamable thermoplastic material is extruded through a first die outlet to produce a foamed thermoplastic material. After exiting the die outlet, a film of non-porous thermoplastic material is applied along at least one side of extruded foamed material. Next, the extruded foamed material and the non-porous film is fed through a forming die which shapes and seals the materials into the desired cross-sectional shape.
摘要:
There is described a method of separating an asparaginase rich fraction from a thermophilic microoganism and then to divide this fraction into its D- and L-asparaginases. Substantially pure crystals of the D-asparaginase were obtained.
摘要:
A natural and sustainable material is derived from the nut of the tagua palm tree that may be fashioned into devices for humans and animals. A pulverized and reconstituted material is disclosed herein that is also treated with a low temperature atmospheric plasma treatment. In an embodiment, a biocompatible carrier gas is ionized to form a biocompatible atmospheric plasma stream. Material, such as nano-scale powdered hydroxyapatite, is introduced into the plasma stream, which is then applied to the natural nut material.
摘要:
A drive system for liquefied natural gas (LNG) refrigeration compressors in a LNG liquefaction plant. Each of three refrigeration compression strings include refrigeration compressors and a multi-shaft gas turbine capable of non-synchronous operation. The multi-shaft gas turbine is operationally connected to the refrigeration compressors and is configured to drive the one or more refrigeration compressors. The multi-shaft gas turbine uses its inherent speed turndown range to start the one or more refrigeration compressors from rest, bring the one or more refrigeration compressors up to an operating rotational speed, and adjust compressor operating points to maximize efficiency of the one or more refrigeration compressors, without assistance from electrical motors with drive-through capability and variable frequency drives.