4results about How to "Improve sampling quality" patented technology

Embodiments of the present specification provide a sample processing method and device, wherein the sample processing method comprises: obtaining a to-be-processed sentence; constructing a word group corresponding to the to-be-processed sentence, and determining a feature label corresponding to each word unit in the word group; constructing at least one negative sample and a target positive sample according to the feature label and the word group; calculating a sample similarity between the target positive sample and each negative sample, and determining a target negative sample in the at least one negative sample according to the sample similarity.

The utility model discloses a kind of sampling devices for recycled concrete production, it is related to concrete sampling technical field, aiming at the problem of inaccurate sampling position in prior art and the process of taking out is more complicated, low efficiency, the following scheme is presented, including fixed pipe, the bottom of the fixed pipe is welded and fixed with conical block, and the inner wall of both ends in fixed pipe is welded and fixed with fixed frame, connecting pipe is fixedly connected between two fixed frames, and connecting pipe is inserted and slidably connected with connecting rod, and the outer wall of connecting pipe is slidably sleeved with equidistantly distributed sampling mechanism. The utility model can play a good guiding and positioning role when inserting recycled concrete pile by welding and fixing conical block at the bottom of fixed pipe, ensure that fixed pipe is accurately inserted into predetermined position, so as to obtain representative sample, greatly improve the accuracy of sampling position, and provide guarantee for subsequent accurate evaluation of recycled concrete quality.

This application discloses an adaptive multi-granularity text embedding representation learning method based on gradient optimization. The method includes: text encoding, multi-granularity embedding generation, difficulty-aware dynamic sampling, sliding window negative sample management, adaptive loss optimization, and model training and validation. It aims to address the performance degradation caused by existing embedding vector dimensionality compression techniques. Through a difficulty-aware dynamic sampling mechanism, a Beta distribution is introduced to achieve progressive learning, significantly improving low-dimensional performance; sliding window negative sample management improves sample quality and training efficiency; and a gradient-oriented update strategy avoids gradient conflicts and optimizes training stability. Furthermore, this invention supports incremental dimensionality expansion, reducing training costs while maintaining consistency across multi-granularity embeddings. This method significantly improves performance in low-dimensional environments, maintains lossless performance in high-dimensional environments, significantly improves training efficiency, greatly reduces storage costs, and exhibits strong generalization ability, making it suitable for data from various domains.

The utility model discloses a kind of negative pressure suction type puncture biopsy apparatus, it is related to medical instrument field.The biopsy apparatus includes needle tube, needle core and pressure device, pressure device is detachably connected with needle tube, is fixed by clamping limiting portion.It has beneficial effect including improving sample quality, convenient operation and improving diagnostic efficiency.Needle tube has scale outside, bottom and needle core cooperate closely.Handle has antiskid line, connecting port and pressure device connecting pipe are closely adhered through conical structure.Needle core surface is smooth, and needle tube is closely adhered.Pressure device can be balloon expansion pressure pump etc., clamping limiting portion improves the stability of connecting portion.Under image guidance, puncture is operated as needed, and sample is obtained by adjusting negative pressure.The biopsy apparatus overcomes the problem that existing puncture biopsy mode is difficult to balance sample efficiency and tissue protection, and the problem of inconvenient operation, can adapt to different texture tissue, improve sample quality and representativeness, reduce operation difficulty and risk.