摘要:
2-aryl-4-quinolones are converted into phosphates by reacting with tetrabenzyl pyrophosphate to form dibenzyl phosphates thereof, which are then subject to hydrogenation to replace dibenzyl groups with H, followed by reacting with Amberlite IR-120 (Na+ form) to form disodium salts. The results of preliminary screening revealed that these phosphates showed significant anti-cancer activity. A novel intermediate, 2-selenophene 4-quinolone and Λ/, Λ/-dialkylaminoalkyl derivatives of 2-phenyl-4-quinolones are also synthesized. These novel intermediates exhibited significant anticancer activities.
摘要:
An atmospheric film-coating method is described, which includes the following steps. A substrate is provided. A gasification step is performed on a film coating solution to form a plurality of film coating vapor molecules. The film coating vapor molecules are deposited on a surface of the substrate to form the film.
摘要:
An intelligent canopy greenhouse control system is provided with two main brackets symmetrically arranged, each of which penetrates a curved tubular beam at its upper edge for the curved tubular beam's one end to protrude from each main bracket. Several small crossbeams are installed between two curved tubular beams for a reinforced structure. At least a louvered shutter is provided between two curved tubular beams and between two main brackets. A film is covered between two curved tubular beams, and steel sheets are freely connected to gaps between two main brackets and under the lower edges of two curved tubular beams for development of a first skeleton unit with gutters installed, around which a canopy greenhouse can be assembled with a plurality of first skeleton units.
摘要:
The invention relates to a speech recognition system and method with cepstral noise subtraction. The speech recognition system and method utilize a first scalar coefficient, a second scalar coefficient, and a determining condition to limit the process for the cepstral feature vector, so as to avoid excessive enhancement or subtraction in the cepstral feature vector, so that the operation of the cepstral feature vector is performed properly to improve the anti-noise ability in speech recognition. Furthermore, the speech recognition system and method can be applied in any environment, and have a low complexity and can be easily integrated into other systems, so as to provide the user with a more reliable and stable speech recognition result.
摘要:
2-aryl-4-quinolones are converted into phosphates by reacting with tetrabenzyl pyrophosphate to form dibenzyl phosphates thereof, which are then subject to hydrogenation to replace dibenzyl groups with H, followed by reacting with Amberlite IR-120 (Na+ form) to form disodium salts. The results of preliminary screening revealed that these phosphates showed significant anti-cancer activity. A novel intermediate, 2-selenophene 4-quinolone and Λ/, Λ/-dialkylaminoalkyl derivatives of 2-phenyl-4-quinolones are also synthesized. These novel intermediates exhibited significant anticancer activities.
摘要:
A magnetizing device for magnetizing a to-be-magnetized object is disclosed. The magnetizing device includes a first magnetic-conducting element, a second magnetic-conducting element and at least a magnetic element. The magnetic element is disposed between the first magnetic-conducting element and the second magnetic-conducting element. A closed magnetic flux loop is formed between the first magnetic-conducting element, the first magnetic element and the second magnetic-conducting element so as to allow the first to-be-magnetized object to be magnetized.
摘要:
The method and circuit for controlling a sensorless single-phase BLDCM having a stator with a winding are proposed. The provided controlling circuit includes a power supply circuit, an inverter coupled to the winding and the power supply circuit, a BEMF detecting circuit coupled to the winding and the inverter and measuring a BEMF of the winding, and a controller coupled to the power supply circuit, the inverter and the BEMF detecting circuit and analyzing a status of the BEMF to control the BLDCM accordingly. The provided method is based on the motor winding time-sharing theory, and the controller controls the inverter to make the winding used as a driving element with loading current when the absolute value of the BEMF is relatively large and as a sensing element when the absolute value of the BEMF is relatively small.
摘要:
A controller of a brushless DC electric machine having a rotor and at least a stator winding powered by a driving voltage is provided. The controller includes a position sensor, an advance angle control circuit, and a driving circuit. The position sensor is moved along a reverse rotating direction of the rotor by a prepositioned angle for outputting a position signal. The advance angle control circuit receives the position signal and a driving voltage reproduction signal reproduced from the driving voltage and outputs a commutation control signal lagging the position signal by a first delay time. The driving circuit receives the commutation control signal for outputting a driving signal for controlling a commutation of the brushless DC electric machine.
摘要:
A main body of a motor stator. The main body includes a cylindrical waist post, a plurality of first salients and a plurality of second salients. The waist post has a first end and a second end. The first salients, spaced at intervals, are connected to the first end and located on a first plane. The second salients, spaced at intervals, are connected to the second end and located on a second plane. When the first salients project onto the second plane along the axial direction of the cylindrical waist post, each projected first salient is located between two adjacent second salients.
摘要:
A stator structure. A first stator part includes a first engaging portion. A second stator part includes a second engaging portion corresponding to the first engaging portion. The first and second stator parts are of the same material. When the first stator part is assembled with the second stator part, the first engaging portion is engaged with the second engaging portion so as to form the stator structure with a waist post.