40results about How to "Big room for improvement" patented technology

The invention discloses a differential mode-locked laser phase-locked loop, which comprises a phase detector, a proportional-integral loop filter, a differential loop filter module, a voltage-controlled oscillator, a photoelectric detector, and a band-pass filter connected in sequence. device, the bandpass filter is connected to the phase detector. The present invention proposes a multiple differential loop filter phase-locked loop scheme, in which two or more differential loop filters are used to compensate the phase lag brought by the piezoelectric transducer and the high-voltage driver; thereby the The upper limit of the phase-locked loop bandwidth is increased by more than an order of magnitude, which greatly expands the improvement space of its phase-locked bandwidth while ensuring the stability of the phase-locked loop.

The application of perovskite oxide SrTiO3 in organic solar cells relates to an organic solar cell. The application is to use the perovskite oxide SrTiO3 as a cathode modification layer of an organic solar cell. Organic solar cells prepared with perovskite oxide SrTiO3 as the cathode modification layer exhibit stable photovoltaic characteristic curves. The titanium oxide SrTiO3 nanoparticles are prepared by a solution method, annealed at different temperatures, and then the active layer of the organic solar cell is swirled on the titanium oxide SrTiO3 nanoparticle layer, and electrodes are plated to form a complete battery. The use of the acidic anode modification layer PEDOT:PSS in the upright structure is avoided, that is, the recombination of the PEDOT:PSS / active layer interface defects on the carriers is avoided, which has a potential enhancement effect on the stability of the organic solar cell.

The invention discloses a bottom die movement control mechanism of a rotary bottle blowing machine die rack. The bottom die movement control mechanism comprises a die rack support, a swing arm, a horizontal guide rail and a bottom die support, wherein a crank connecting rod structure capable of driving the bottom die support to reciprocate along the vertical direction is arranged between the swing arm and the bottom die support; a ball sliding block capable of restricting the bottom die support to move along the vertical direction and a ball guide rail are arranged between the bottom die support and the die rack support. By virtue of reciprocating swing of the swing arm along the locus of the horizontal guide rail, the crank connecting rod structure drives the bottom die support to reciprocate along the vertical direction; by use of only one horizontal guide rail, the opening and closing of a forehead die rack on the die rack support and the ascending and descending of the base on the bottom die support are completely controlled, a bottom die guide rail which is traditionally used for controlling the ascending and descending of the bottom die support is omitted; under a condition of same rotation speed, the noises and vibration of the bottom die movement control mechanism are more less than those generated by a die rack when two different guide rails are respectively used for controlling respective movement of the movement bottom die and the opening and closing of the die rack in the prior art, so that a great improvement space is provided for the operation reliability and speed of machines.

The invention relates to a query-oriented multi-document automatic summarization method, comprising the following steps: preprocessing the query and the document; subjecting the preprocessed document to subject segmentation and semantic paragraph clustering to obtain subtopics; The sentences in each subtopic are expressed in the form of word frequency vectors, and the correlation between the query and the subtopic is calculated; according to the correlation between the query and the subtopic, the subtopics are screened, and the subtopics are sorted according to the importance of the subtopics, and the top T is selected. An important subtopic is obtained to obtain an ordered sequence of subtopics related to the query; representative sentences are cyclically extracted from the sequence of subtopics, and the representative sentences are connected to generate a summary. The method of the present invention uses the topic segmentation technology to make the abstract within a limited length range, including the more important information in the document set as much as possible, providing more targeted services, and adjusting the content of the abstract according to the user's query topic to realize the interaction with the user .

The invention relates to a mining monorail crane lifting and conveying device and belongs to the technical field of auxiliary conveying devices. The mining monorail crane lifting and conveying deviceis arranged on a guide rail, lifting devices are controlled to move on the guide rail through a drawing device, a braking device and a drawing rod, lifting motors below the lifting devices operate when heavy objects are lifted, the lifting device motor on the left side rotates anticlockwise, the lifting device motor on the right side rotates clockwise, the motors drive coils to uplift a hook, gears on one sides of the lifting devices move on a bracket under the action of the lifting motors and differential mechanisms, and the spacing between the two lifting devices is increased when the heavyobjects are lifted, and is decreased when the heavy objects are released.

The invention discloses an underwater IOT (Internet of Things) system of VLC (Visible Light Communication) based on blue LEDs (Light Emitting Diodes). The underwater IOT system is characterized in that underwater devices, underwater sensors, underwater terminals or underwater gateways are used as node units; the underwater IOT system is formed by the multiple node units according to a certain network interconnection topological structure, and the VLC based on the blue LEDs is used as an information transfer means between every two node units; the network interconnection topological structure of the underwater IOT system comprises a basic chain type network, a daisy chain type network or an AdHoc network. In the underwater IOT system disclosed by the invention, a high-brightness blue LED is adopted as a light emitting unit carrying a bidirectional blue LED receiving and transmitting module, so that three problems of low underwater communication reliability, high cost and high-frequency modulation difficulty are solved; a silicon-PIN photodiode having high flexibility in a visible light wave band is adopted as a light receiving unit, so that the problems of difficulties in realizing high-speed response, low price and high reliability are solved; through the measures, a high-speed information interconnection IOT system is provided for devices and terminals in underwater movement and underwater operation.