摘要:
A method of regioselectively preparing a pyridine-containing compound is provided. In particular embodiments, the method includes reacting halogen-functionalized pyridal[2,1,3]thiadiazole with organotin-functionalized cyclopenta[2,1-b:3,4-b′]dithiophene or organotin-functionalized indaceno[1,2-b:5,6-b′]dithiophene. Also provided is a method of preparing a polymer. The method includes regioselectively preparing a monomer that includes a pyridal[2,1,3]thiadiazole unit; and reacting the monomer to produce a polymer that includes a regioregular conjugated backbone section, wherein the section includes a repeat unit containing the pyridal[2,1,3]thiadiazole unit. A polymer that includes a regioregular conjugated backbone section, and electronic devices that include the polymer, are also provided.
摘要:
Methods and materials for preparing organic semiconducting layers include, for example, one used in an organic semiconductor device including a substrate with a nano structured surface and an organic semiconductor film overlying the nanostructured surface. The semiconductor film is typically formed from macroscopically ordered polymer fibers made from selected conjugate polymer compounds. Such polymer fibers synthesized from selected conjugated polymer compounds and directionally aligned in organic semiconductor devices can provide these devices improved functional properties, including for example, unexpectedly high field effect saturation mobilities.
摘要:
A method for the production neutral triblock all-conjugated copolymers by palladium-catalyzed chain-growth polymerization, and methods to convert these copolymers into all-conjugated triblock polyelectrolytes with well-controlled molecular weight and polydispersity. A device is provided which incorporates such all-conjugated triblock polyelectrolytes as an electron injection layer.
摘要:
A method and system of accelerating the acquisition and reconstruction of magnetic resonance images. Magnetic resonance imaging (“MRI”) data is acquired from a plurality of coils using parallel MRI (“pMRI”). The MRI data represents a reduced field-of-view (“FOV”) image for each of a plurality of coils. The MRI data is further undersampled by sequentially applying a compressed sensing (“CS”) technique, such as SparseMRI. The undersampled, reduced FOV images are then reconstructed into a final magnetic resonance image using a pMRI reconstruction technique, such as SENSitivity encoding (“SENSE”). This combination of MR image acquisition, sampling, and reconstruction is referred to as CS-SENSE.
摘要:
A method and a system for generating a magnetic resonance image of a subject. The method and system include generating a first pulse having first random data having a first amplitude and a first linear phase; applying the first pulse to the subject as an radio frequency pulse; collecting a first signal from the subject; generating a second pulse having second random data having a second amplitude and a second linear phase, wherein the second amplitude is substantially equal to the first amplitude, and wherein the second phase has a different slope from the first phase; applying the second pulse to the subject as an radio frequency pulse; collecting a second signal from the subject; and reconstructing an image of the subject.
摘要:
A method and system of accelerating the acquisition and reconstruction of magnetic resonance images. Magnetic resonance imaging (“MRI”) data is acquired from a plurality of coils using parallel MRI (“pMRI”). The MRI data represents a reduced field-of-view (“FOV”) image for each of a plurality of coils. The MRI data is further undersampled by sequentially applying a compressed sensing (“CS”) technique, such as SparseMRI. The undersampled, reduced FOV images are then reconstructed into a final magnetic resonance image using a pMRI reconstruction technique, such as SENSitivity encoding (“SENSE”). This combination of MR image acquisition, sampling, and reconstruction is referred to as CS-SENSE.
摘要:
A method of parallel magnetic resonance imaging (pMRI) comprising acquiring pMRI signals simultaneously through a plurality of receiving coils, wherein each coil has a localized sensitivity with respect to an imaged volume; jointly estimating values for the imaged volume and for a sensitivity function for at least one of the plurality of receiving coils; and transmitting the reconstructed image to a device.
摘要:
Methods and system for dynamic reallocation of data processing resources for efficient processing of sensor data in a distributed network is provided. The methods and system include determining a data transmission cost ft; determining a data processing cost fp; determining a data storage cost fs; and determining a data query Q which minimizes f(ft+fp+fs) for a system of networked data processing resources.
摘要:
The present disclosure provides a wire or cable comprising a flame retardant-free thermoplastic inner sheath and an outer sheath composition comprising, based on the weight of the composition, (a) 10 wt % to 90 wt % of a TPU based resin, (b) 5 wt % to 90 wt % of a metal hydrate, (c) 2 wt % to 50 wt % of a nitrogen-based phosphorus flame retardant, and (d) 2 wt % to 50 wt % liquid phosphate modifier, wherein the outer sheath is in contact with the insulation covering, and wherein the outer sheath has a thickness from greater than zero to 0.8 mm.
摘要:
A method and a system for generating a magnetic resonance image of a subject. The method and system include generating a first pulse having first random data having a first amplitude and a first linear phase; applying the first pulse to the subject as an radio frequency pulse; collecting a first signal from the subject; generating a second pulse having second random data having a second amplitude and a second linear phase, wherein the second amplitude is substantially equal to the first amplitude, and wherein the second phase has a different slope from the first phase; applying the second pulse to the subject as an radio frequency pulse; collecting a second signal from the subject; and reconstructing an image of the subject.