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经典的稀疏表示分类（SRC）通常是基于求解L1最小化问题的。SRC在原始输入空间中求解L0范数最小化问题，无法很好地获取数据中的非线性信息。为了解决这一问题，应用非线性映射将原始输入数据映射到一个新的高维特征空间，并提出了一种新的基于L0范数的表示方法。在所提方法中，表示测试样本的字典包含两个部分：第一部分固定在测试样本的近邻；第二部分的训练样本通过半遗传算法（SGA）来选择，利用表示误差确定第二部分的表示字典。在所提方法中，如果训练样本和已确定的测试样本的近邻产生最小表示误差，那么这些训练样本将被 SGA 确定为表示字典的第二部分。在一些常用的人脸数据集和一个手写体数据集上的实验表明，所提方法能够获得更好的分类性能。

Copyright of Traditional Chinese Drug Research & Clinical Pharmacology is the property of Traditional Chinese Drug Research & Clinical Pharmacology Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Ceramics / Taoci Xuebao is the property of Journal of Ceramics Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Industrial Minerals & Processing / Huagong Kuangwu yu Jiagong is the property of Industrial Minerals & Processing Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Practical Pharmacy & Clinical Remedies is the property of Editorial Department of Practical Pharmacy & Clinical Remedies and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Heart failure is a fatal stage of end-stage cardiovascular disease, which brings a huge medical burden to the society because of its high mortality and re-hospitalisation rates. Intestinal microecology is the largest and most complex microecosystem of human body. It is inhabited by tens of thousands of microorganisms in human gastrointestinal tract. In recent years, with the deepening of the study of intestinal flora, more and more studies have found that the imbalance of intestinal microecology can cause changes of metabolites in heart failure patients, which is one of the key triggers for the development of heart failure, therefore, using the intestinal microbial homeostasis as a new entry point for the treatment of heart failure will be a hotspot in medical research. However, the theory of Chinese medicine, "the spleen is the guardian", covers the physiological functions of the spleen, such as the spleen􀆳s main function of transporting, spleen􀆳s main function of ascending and clearing, and its main function of hiding camping, etc., and the functions of intestinal flora and the "spleen is the guardian" are similar to a certain extent. Therefore, this paper starts from a holistic viewpoint and takes the theory of "spleen as the guardian" in Chinese medicine as an entry point to elaborate on the pathogenesis of intestinal microecological imbalance and heart failure, so as to provide a reference for Chinese medicine treatment or drug research. [ABSTRACT FROM AUTHOR]

Copyright of China Rural Water & Hydropower is the property of China Rural Water & Hydropower Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Functional Polymers is the property of Journal of Functional Polymers and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of New Medicine is the property of Sun Yat Sen University and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

BACKGROUND: The majority of current molybdenum ore analysis techniques use absorbance, gravimetric methods, ICP-MS, ICP-OES, XRF, etc., which are primarily based on liquid injection, with a lengthy analytical procedure, complex steps, and a measurable range of 0.01%-5.17%. The joint technologies of EPMA, SEM, and X-ray spectroscopy are more expensive, and the results may not be reproducible. Compared with the above methods, AC-Arc atomic emission spectrometry (Arc-AES), which does not call for the use of acids and bases, has the potential to be applied to the analysis of molybdenum ore and molybdenum powder with a high content of Mo over 5%. OBJECTIVES: To improve the current analytical techniques for determining high content of molybdenum in molybdenum ore. METHODS: The mixed sample was loaded into the lower electrode after being ground at 2400Hz for 30min with the different sample-to-buffer ratio in a 5mL crucible. Two drops of a 2% mass fraction sucrose-ethanol solution were added and dried at 70℃ for 1h. The samples were mounted on an AES-8000 direct-reading atomic emission spectrometer using the vertical electrode method. The internal reference method was used to fit the quadratic curve in logarithmic coordinates by subtracting the background spectral lines of the analyzed elements and the internal reference elements. The experiments were conducted by choosing the internal reference element types and spectral lines, selecting the Mo spectral lines, deciding the sample-to-buffer ratio, optimizing the current loading procedure, setting the spectral uptake time, and other conditions. A set of national-level reference materials and national-level synthetic silicate spectral analysis reference materials were used for calibration. The relative standard deviation and logarithmic deviation were utilized for quality control. RESULTS: (1) The analytical line pair is chosen to be Mo 277.54nm/Ge 326.9494nm. The uniformity of internal reference elements is ensured by the excessive addition of germanium dioxide. Mo 277.54nm and Ge 326.9494nm evaporation curves exhibit good consistency when GBW07142 is used as the sample. (2) The sample-to-buffer ratio is selected as 1∶2. It is discovered that the evaporation behavior is significantly improved when it reaches 1∶2; simply increasing the buffer, is not conducive to the analysis of actual samples. (3) Primary current is 4A for 5s, secondary current is 15A for 30s, and the total interception exposure time is 35s. The results show that the intensity of Mo and Ge greatly increases before 30s and slows down after 35s. (4) The reference series components are shown in Table 1 with the content range between 500 to 500800μg/g. The reference curve equation is y=−0.077x² +1.3077x+1.2725, with a coefficient of determination (R² ) of 0.999. The detection limit of Mo in this method is 27.38μg/g, which is slightly higher than that of alkali fusion inductively coupled plasma spectrometry (0.002%) and X-ray fluorescence spectrometry (0.0026%). The RSD ranges from 3.28% to 8.30%, and the RE ranges from −0.43% to 0.73% (Table 2). The results are consistent with the reference values, with significant precision and accuracy, which meets the requirements (△lgC≤0.05, RSD ≤10%) listed in Specification of Multi-Purpose Regional Geochemical Survey (DZ/T 0258—2014). CONCLUSIONS: This method can be employed to determine the high Mo content in molybdenum ore and molybdenum powder without dilution. Moreover, it is suitable for a wider determination range with the upper limit rising to 50%. It can solve possible problems, such as large sample demand, large chemical reagent use, cumbersome operation and contamination in other analytical methods. [ABSTRACT FROM AUTHOR]

Gastric cancer is one of the most common malignant tumors in the digestive system. Traditional Chinese medicine has attracted the attention of scholars at home and abroad due to its multi-target and multi-pathway anticancer advantages. Recent studies have shown that small molecular compounds of traditional Chinese medicine represented by flavonoids, phenols, alkaloids and terpenoids, such as quercetin, resveratrol, curcumol, ginsenoside and baicalin, by regulating Wnt/β-catenin, nuclear factor-κB, phosphatidylinositol 3 kinase/protein kinase B/mammalian target of rapamycin, transcription activator 3, mitogen-activated protein kinase and Notch signaling pathways, it plays an effective role in inhibiting tumor cell proliferation, inducing apoptosis and migration of cancer cells, and inhibiting tumor angiogenesis, and synergistically enhancing the sensitivity of chemotherapy drugs. This article reviews the experimental studies in recent years and explores the related signaling pathways of the active components of traditional Chinese medicine in the treatment of gastric cancer, which is helpful to provide effective reference for the research and development of new drugs and clinical diagnosis and treatment. [ABSTRACT FROM AUTHOR]

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Copyright of Progress in Modern Biomedicine is the property of Publishing House of Progress in Modern Biomedicine and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Computer Measurement & Control is the property of Magazine Agency of Computer Measurement & Control and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)