60results about How to "Avoid excessive noise" patented technology

A valve assembly for a pump includes a pump chamber and a pump head having complementary recesses formed therein which cooperate to define a valve compartment including a pocket and an opposed seat. A flexible valve element is disposed between the recesses and adapted to move between a closed position against the seat which prevents fluid flow and an open position away from the valve seat which permits fluid flow. The dimensions of the valve compartment are selected to limit the movement of the valve element in the open position, which increases the pump efficiency and prevents damage to the valve element and / or valve overlap.

A branched optical isolator includes, located over a substrate, at least two branches connected to a trunk at a junction location. At least one branch comprises an optical absorber material and at least one branch comprises an optical transmitter material. The optical isolator may be incorporated into an optical chip carrier such that: (1) an optical emitting portion of an optical chip integral to or attached to the optical chip carrier; and (2) a connection to the optical isolator, are butt connected with a gap less than 10 nanometers, and otherwise materials matched. The optical isolator provides for attenuated backscattered optical radiation into the optical chip.

The invention discloses a hidden fan blade ceiling fan lamp which comprises a rotary disc, a motor upper cover, belt wheels, fan blades and tension springs. The rotary disc is fixed to the upper surface of a bottom disc. A motor assembly is arranged in the motor upper cover and connected with the rotary disc. Fan fixing discs are arranged on the rotary disc. Each belt wheel is sleeved with the corresponding fan fixing disc. The four fan blades are fastened on the four fan fixing discs. A gear is arranged at the upper end of each fan fixing disc. One end of each of the four belt wheels is engaged with the corresponding gear, and the other ends of the four belt wheels are engaged with four small gears. The small gears are mounted at arc groove positions of a limiting plate and engaged with inner teeth at the arc groove positions. One end of each tension spring is connected with the rotary disc, and the other end of each tension spring is connected with the limiting plate. According to the hidden fan blade ceiling fan lamp, the fan blade opening angle ranges from 120 degrees to 150 degrees, and the optimal air volume and the effect of lowering noise can be achieved; and by means of a belt wheel transmission structure, too high noise generated by direct contact of sun gear combination planet gears is avoided.

The invention discloses an intrusion detection method based on observational learning. According to the intrusion detection method, the observational learning and semi-supervised ensemble learning are combined, unlabeled data is labeled to form a labeled data set with an ensemble result by individual classifier by observing output results to an unlabeled data set by other classifiers in network data detection, and the labeled data set is added to the original labeled data set to train the classifier again. According to the intrusion detection method, the unlabeled data is fully used and is translated to the labeled data to further improve the performance of the classifiers, and the intrusion detection method also has good detection effect in the case of a small amount of the labeled data. According to the intrusion detection method, each classifier generates virtual data per se without help of any external forces in the learning process, the virtual data and initial data set are trained, re-observed and re-trained together, and the identification performance of a detection system is effectively improved. The intrusion detection method can be expanded for processing a large amount of unlabeled training data, such as the application fields of medical images, web page classification, remote sensing image processing, face identification, and the like.

The invention relates to the related technical field of the automobile field, in particular to an automobile roof plate with excellent flame retardant and heat insulation effect in the automobile field, comprising a reinforcing beam, a top cover, a ceiling plate and an interior layer, and a plurality of reinforcing beams are arranged at equal intervals, And the two ends of the reinforcement beams are respectively fixed on the side frames on both sides of the car through the fixed structure, the two ends of the roof panel are installed on the two adjacent reinforcement beams, the top cover is arranged on the upper surface of the roof panel, and the interior decoration layer. It is arranged on the lower surface of the roof panel; by arranging the vehicle roof panel composed of the reinforcement beam, the top cover, the roof panel and the interior layer, and by arranging the reinforcement beam to be composed of the main beam plate and the reinforcement rib, and the main The beam plate and reinforcing bar are arranged in an inverted T-shaped structure, thereby effectively improving the overall strength of the car roof, and the meshing installation between the roof plate and the reinforcing beam can improve its overall stability and ensure its connection. of aesthetics.