摘要:
A stuffing box for a polished rod used with a downhole pump uses injectable packing to provide a seal around the polished rod. The stuffing box has a chamber for receiving the packing. The chamber has an opening to allow the addition of packing to the chamber. The packing is maintained in a compacted condition by either injecting additional packing through the opening or adjusting the volume of the chamber.
摘要:
An improved system and method is provided for feature selection for text classification using subspace sampling. A text classifier generator may be provided for selecting a small set of features using subspace sampling from the corpus of training data to train a text classifier for using the small set of features for classification of texts. To select the small set of features, a subspace of features from the corpus of training data may be randomly sampled according to a probability distribution over the set of features where a probability may be assigned to each of the features that is proportional to the square of the Euclidean norms of the rows of left singular vectors of a matrix of the features representing the corpus of training texts. The small set of features may classify texts using only the relevant features among a very large number of training features.
摘要:
A delivery system and methods for generating droplets of liquid active materials, such as a perfume, air freshener, insecticide formulation, and volatile materials, to the atmosphere by means of a electromechanical transducer. The electromechanical transducer employs a first period of activation and a second period of deactivation to increase the distribution of volatile materials contained within the liquid active materials to the atmosphere and reduce the hedonic habituation of the user. The electromechanical transducer is configured to improve flow rate and decrease deposition of the droplets on to nearby surfaces.
摘要:
An apparatus for unloading a comminuted material contained in a bag having means disposed at an upper end portion thereof for suspending the bag and a closable discharge outlet disposed at a lower end thereof generally consisting of a support means; and a hopper having an upper inlet functional for receiving the closable discharge spout portion of the bag when the bag is disposed in a suspended position above the hopper, a lower outlet communicable with a material conveying means, a side opening through which an operator may obtain access to a lower end of the bag inserted into the hopper, and a baffle extending downwardly and transversely from a wall section of the hopper, from and below the access opening, toward and short of a hopper wall disposed opposite the hopper wall provided with the access opening, providing a flow path of material introduced into the hopper for the hopper outlet.
摘要:
The guide has a barrel segment and a bushing segment. The barrel segment couples to the upper end of the pump barrel. The bushing segment has a bushing stop. The length of the guide is adjustable so as to vary the length of the bushing stop from the barrel. By varying the length of the guide, the travel of the plunger is adjusted to provide for a small compression chamber without the plunger contacting the barrel.
摘要:
A video editing system and method using machine learning are described. In one embodiment, the video editing system comprises editing processing logic controllable to perform at least one edit on one or more raw input feeds to render one or more final cut clips for viewing, each edit to transform data from one or more of the raw input feeds into the one or more of the plurality of final cut clips by generating tags that identify highlights from signals and a machine learning module operable to access data from memory and operable to generate settings to control the editing processing logic based on the data using one or more machine learning algorithms to control the editing processing logic.
摘要:
A stuffing box for a polished rod used with a downhole pump uses injectable packing to provide a seal around the polished rod. The stuffing box has a chamber for receiving the packing. The chamber has an opening to allow the addition of packing to the chamber. The packing is maintained in a compacted condition by either injecting additional packing through the opening or adjusting the volume of the chamber.
摘要:
A system for supporting individuals or objects is disclosed that can be used, e.g., as a bunk for sleeping upon within a vehicle, such as, e.g., a truck or commercial vehicle. The system preferably includes a support platform, a pivot mechanism, and at least one flowable-medium spring. The support platform is provided with an upper surface to support at least one individual or object within a vehicle. The pivot mechanism is connected to the support platform so as to pivot the support platform around a pivot axis to move between a stored position and a deployed position in which the support platform supports the at least one individual or object. The at least one flowable-medium spring is provided with a first end fixed relative to the vehicle and a second end fixed relative to the support platform at a location displaced from the pivot axis. Each of the at least one flowable-medium springs is arranged so as to impart an extension force that biases the support platform toward the deployed position and so as to impart an extension force that biases the support platform toward the stored position during at least portions of the movement of the support platform between the stored position and the deployed position.
摘要:
A dc-to-coax adapter is provided for establishing an electrical coupling between a power source and a coaxial cable device. The adapter may include a power connector portion and an RF connector portion. In an exemplary embodiment the power connector portion comprises a dc jack adapted to establish an electrical coupling with a standard dc barrel plug connector and the RF connector portion comprises a female F connector adapted for establishing electrical coupling with a male F connector. The contacts of the power connector portion may be integrated with the contacts of the RF connector portion the adapter housing may provide a continuous ground connection.