摘要:
A multi-energy static security CT system comprises at least one N-stage image chain structure (5) and a baggage conveying belt (4) provided at an inner side at the bottom of the N-stage image chain structure (5). The N-stage image chain structure (5) and the baggage conveying belt (4) are fixed at a pre-configured positions by means of a machine frame (8). The N-stage image chain structures (5) are sequentially arranged in a forward direction of a baggage channel, and adjacent N-stage image chain structures (5) are offset relative to each other. By exposing radiation sources in the N-stage image chain structure (5) at different times, the static security CT system generates an image having a higher temporal resolution and more energy spectrum levels than an image generated by a spiral CT system. Also provided is an imaging method implemented by means of the static security CT system.
摘要:
A dispersion compensation fiber comprises a fiber core and cladding. The fiber core is a core layer mainly doped with germanium and having a positive relative refractive index difference. The cladding covering the fiber core comprises a trench cladding mainly doped with fluorine, an annular cladding mainly doped with germanium, a matching cladding mainly doped with fluorine, and an outermost mechanical cladding in order. Relative refractive index differences of the fiber core and the claddings are respectively: Δ1% being 1.55% to 2.20%, Δ2% being −0.55% to −0.30%, Δ3% being 0.40% to 0.65%, Δ4% being −0.20% to −0.01%, and Δ5% being 0. Radius ranges, from R1 to R5, of the fiber core and the claddings are respectively: R1 being 1.4 to 1.7 μm, R2 being 4.1 to 4.8 μm, R3 being 6.7 to 8.8 μm, R4 being 10 to 17 μm, and R5 being 38 to 63 μm.
摘要:
A low attenuation single mode optical fiber includes a core layer and claddings. The core layer has the relative refractive index difference (RRID) Δ1 ranging from −0.1% to +0.1% and the radius R1 ranging from 4.0 μm to 6.0 μm. The claddings have three claddings layers surrounding the core layer. The RRID of the first cladding layer Δ2 ranges from −0.2% to −0.6%, and the radius R2 thereof ranges from 10 μm to 22 μm. The RRID of the second cladding layer Δ3 is less than Δ2. The RRID and radius of the first cladding layer and the RRID and radius of the second cladding layer satisfy the relationship of: V=(Δ2−Δ3)×(R3−R2), and the value of V ranges from 0.15% μm to 0.8% μm. The third cladding layer is all the layers that closely surround the second cladding layer, and the RRID of each layer is greater than Δ3.
摘要:
A method of purifying a salt of pemetrexed having a structure of formula (III) by salting-out, wherein if M3+ is H+, then each of M1+ and M2+ is independently H+, Li+, Na+ or K+, provided that both of them are not H+; if M3+ is Li+, Na+ or K+, then each of M1+ and M2+ is independently Li+, Na+ or K+.
摘要:
A technique to provide fuel to a solid oxide fuel cell with low water consumption is described that includes providing an initial fuel mixture with air and hydrocarbon, and partially oxidizing the fuel mixture with a catalyst to provide a reformed fuel mixture. Also included is adding an amount of water to the reformed fuel mixture to reduce formation of elemental carbon from carbon monoxide in the reformed fuel mixture and supplying a portion of the reformed fuel mixture combined with water to an electrochemical device that produces electrical power from hydrogen in the reformed fuel mixture.
摘要:
The present invention relates to morphinan derivatives and preparation methods thereof, especially to ketal hydroxyl protected compounds of morphinan derivatives and preparation method thereof, and to a method for preparing corresponding alkylated morphinan derivatives by using the ketal hydroxyl protected compounds as intermediates, and more especially to a ketal hydroxyl protected compound of methylnaltrexone as intermediate for preparing methylnaltrexone and a method for preparing methylnaltrexone through said intermediate.
摘要:
The present invention includes methods, articles, compositions and colorant dyes and pigments that include biocidal N-halamine dye composition having two or more heterocyclic ring structures attached to one or more N-halamine groups, wherein one or more halogens associate with the one or more one or more N-halamine groups to affect biocidal activity.
摘要:
The invention provides methods, compositions and transformation systems for modifying the levels of transcription factors in plants such as Solanaceous plants, and introducing disease resistance genes into plants, to produce products with elevated levels of antioxidant compounds, including but not limited to flavonols and chlorogenic acid, as well as exhibiting enhanced disease resistance, and optionally altered appearance. Preferred plants are those in which introduced genes are from Solanaceous species.
摘要:
Embodiments of the present invention disclose a method for managing network device data and a network management system. The method including: storing identifiers respectively for different types of device data at the device side; the network management system storing the identifiers of the different types of device data into a database of the network management system upon synchronizing the device data; and during TRAP message processing and timing data synchronization, the network management system comparing the identifiers locally stored with the identifiers from the device side, and performing a corresponding update according to the comparison result.
摘要:
The invention provides a method of evaluating a query involving a relational database comprising a relational data-base management system (RDBMS), said query relating to at least one table of said relational database, said method comprising determining a table as a gateway table for evaluating said query, retrieving one or more unique identifiers of said gateway table related to one or more entries in a table to be queried, retrieving information from tables to be queried related to said retrieved unique identifiers of said gateway table, and providing a result set comprising the retrieved primary keys of the gateway table in relation to said retrieved information. The invention further provides a related data processing system and program.