Abstract: User generated content, particularly Chinese language content, is retrieved from various sources such as forums, microblogs, social media sites, and the like. A portion of the content is manually labeled with a sentiment associated with the content and may be classified according to subject matter referenced. Sentiment-indicating features of the content is extracted according to a sentiment dictionary, which may include topic-specific jargon. The features are used to train a classifier to determine sentiment of content based on sentiment-indicating features. The sentiment for other content may then be determined using the classifier. The output of the classifier may be combined with an explicit rating of a product or product feature.

Abstract: A method includes obtaining at least one digital waveform corresponding to acoustic signals collected by a logging tool deployed in a downhole environment. The method also includes performing windowed frequency spectra analysis (WFSA) on the at least one digital waveform to obtain frequency semblance information at different time-slices. The method also includes deriving a slowness log as a function of position using the frequency semblance information.

Abstract: A system and downhole tool comprising an ultrasonic transducer with a piezoelectric material embedded in a backing and a method of determining a parameter using the ultrasonic transducer. A self-noise of the transducer can be reduced by the piezoelectric material being at least partially embedded in the backing. The ultrasonic transducer can include an encapsulating material that encapsulates the backing.

Abstract: In accordance with embodiments of the present disclosure, systems and methods for improving performance of ultrasonic transducers, particularly those used in borehole environments, are provided. The disclosed ultrasonic transducers all feature a backing element that is a ceramic backing material. The ceramic backing material may include a solid piece of ceramic material that is disposed on a back end of a piezoelectric element used in the ultrasonic transducer. The disclosed ceramic backing material may be used to mechanically match the backing element to the piezoelectric source element, while minimizing the amplitude of reflections of the ultrasonic pulse generated by the piezoelectric element and reflected at the far end of the backing element. This ceramic backing material may provide consistent performance regardless of the surrounding pressure and temperature, making it particularly useful in borehole applications.

Abstract: An assembly for mounting a vehicle sunshade in a panel opening comprises a first mounting member that receives a sunshade mounting shaft to permit rotation thereof. A second mounting member closely receives the first mounting member. A plurality of resilient legs extend from the second mounting member. The legs are arranged to extend into the panel opening to retain the second mounting member in the panel opening. Cooperating surfaces on the interior of the legs define an axially outer first position of engagement and an axially inner second position of axial engagement. The first position prevents radial inward deflection of the legs to retain the first mounting member in the panel opening and the second position permits radial inward deflection to allow removal of the second mounting member from the panel opening.

Abstract: A panel fastener includes separable components formed from two different plastics, one relatively rigid and the other somewhat more flexible and resilient. The two components are formed in a two shot injection molding process and are joined through a ball and socket joint that allows subsequent separation and reconnection.