Automatic Sampling Method Research Articles

Ancient Yi Script Handwriting Sample Repository

The ancient Yi script has been used for over 8000 years, which can be ranked with Oracle,Sumerian,Egyptian,Mayan and Harappan,and is one of the six ancient scripts in the world. In this article, we collected 2922 handwritten single word samples of commonly used ancient Yi characters. Each character was written by 310 people respectively, with a total of 427,939 valid characters. We completed continuous handwritten text sampling, written by 250 people, with 5 texts per person, covering topics such as Yi astronomy, geography, rituals, and agriculture. In the process of data collection, we proposed an automatic sampling method for ancient Yi script, and completed the automatic cutting and labeling of handwritten samples. Furthermore, we tested the recognition performance of the sorted data set under different deep learning network models. The results show that ancient Yi script has diverse shape structures and rich writing styles, which can be used as a benchmark data set in related fields such as handwritten text recognition and handwritten text generation.

Design and Realization of Fully Automatic Pump Performance Test System

With the development of automation technology, it gradually replaces manual labor in various fields. Pumps are widely used in various production processes in the industrial field. To enhance the automation level of the pump production and testing process will significantly reduce production costs. This paper aims to design and realize a set of fully automatic, high-precision pump performance testing system. The fully automated operation of the performance test is designed according to the flow rate automatic sampling method, to achieve the accurate measurement of the pump operating conditions. Utilizing the PID algorithm, the valve is automatically adjusted through PLC control to realize the accurate positioning of the flow measurement point. With the help of the software program to carry out the calculation and analysis of test data, to achieve the visualization of the test process of the whole performance test data management. At the same time, SQL Server database is used to realize rapid query and management of test data. After the test verification, the system realizes the full-automatic measurement of the pump performance curve, and the measurement accuracy conforms to the standard of ISO 9906:2012.

Research on fully automatic analysis methods for hydrogen energy

An ion chromatograph equipped with an anion exchange column was used to study the analytical methods for total halides and formic acid in hydrogen fuel. An automatic sampling method was established and compared with the manual injection method. A good linear relationship was observed between the peak area and concentration (r2 = 0.999), with a relative standard deviation (RSD) of less than 3% and a detection limit of the instrument at 0.01 mg/L. The experimental results indicate that this method has excellent repeatability and high sensitivity, enabling fully automatic analysis of total halides and formic acid content in hydrogen energy. This provides a fully automatic online analysis solution for the quality of hydrogen energy in the upstream, midstream, and downstream sectors.

A fast and robust cirrus removal method for Landsat 8/9 images

High-quality cirrus removal plays a crucial role in remote sensing data analysis. Cirrus parallaxes are commonly observed within the vicinity of cirrus clouds in the visible and near-infrared (VNIR) bands of Landsat 8/9 images. Cirrus parallaxes have a nonnegligible effect on cirrus removal, but the existing methods do not account for the correction of parallaxes. Meanwhile, large-scale image processing involves intensive computation that requires extensive computing time. To address the effect of cirrus parallaxes and the low processing efficiency, we propose a fast and robust cirrus removal (FRCR) method. FRCR has achieved the first realization of the statistics law of cirrus parallax between the VNIR and cirrus bands, thus realizing the cirrus parallax correction. In addition, FRCR introduces an automatic sampling method to obtain the regression samples for practicality. Then, a Compute Unified Device Architecture (CUDA) based Newton method with constraints is introduced to parallelize the computation, to improve the computational performance. Experiment results of various scenarios demonstrate that the FRCR method can achieve high-quality cirrus removal by eliminating cirrus parallaxes, and significantly improving computational performance.

Characteristic signal extracted from a continuous time signal on the aspect of frequency domain**Project supported by the National Natural Science Foundation of China (Grant No. 61471158) and 2018 Heilongjiang University Graduate Innovation Research Project of China (Grant No. YJSCX2018-142HLJU).

Extracting characteristic signal from a continuous signal can effectively reduce the difficulty of analyzing the running states of a single-variable nonlinear system. Whether the extracted characteristic signal can accurately reflect the running states of the system is very important. In this paper, a method called automatic sampling method (ASM) for extracting characteristic signals is investigated. The complete definition is described, the effectiveness is proved theoretically, and the general formulas of the extracted characteristic signals are derived for the first time. Furthermore, typical Chuaʼs circuit is used to accomplish a lot of experimental research on the aspect of frequency domain. The experimental results show that ASM is feasible and practical, and can automatically generate a characteristic signal with the change of the original signal.

Answering unique topic queries with dynamic threshold

Queries with threshold are common when dealing with unstructured data such as text corpus. It often requires several exploring attempts for users to achieve final results. In this work, we propose an automatic sampling method for threshold determination without any interaction with users, in which two optimizing algorithms are introduced to reach the lower-bound time complexity in each sampling trial. We evaluate our methods using several experiments and demonstrate the effectiveness of it, which can be an enormously powerful tool for ordinary users.

A System for LogD Screening of 96-Well Plates Using a Water-Plug Aspiration/Injection Method Combined with High-Performance Liquid Chromatography−Mass Spectrometry

A system for screening of the octanol/water distribution coefficient (LogD) using automatic sampling of 96-well plates was developed. The high-speed assay for LogD (HSLogD) screening uses a water-plug aspiration/injection method combined with high-performance liquid chromatography-mass spectrometry (HPLC-MS). The method is useful for LogD analysis of highly hydrophobic compounds, where the concentration of the compound in the octanol phase is much higher than that in the water phase. In the case of LogD analyses, the conventional shake-flask method has been widely used, but it is difficult to increase the throughput of the shake-flask method because the lower water phase is carefully separated by manual separation without contamination of the upper octanol phase. We attempted to develop an automatic sampling method instead of manual separation to increase the throughput of the measurement. In initial attempts at automatic sampling, contamination of the octanol phase occurred when sampling of the water phase was made. This was because the octanol phase entered the sampling needle as it passed through to the lower water phase. This contamination was prevented by taking up a few microliters of water into the needle as a plug before sampling of the water phase (the water-plug aspiration/injection method). LogD values of some common drugs measured using the HSLogD agreed with reported LogD values (0 < LogD < 5).

An Automatic Sampling Method of 14CO2 in the Expired Air

An Automatic Sampling Method of 14CO2 in the Expired Air