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文章提出了基于树状图的电力光纤通信网安全风险的量化模型,详细分析了风险与其各个要素资产、威胁、脆弱性和安全措施之间的关系,并用公式具体解释了它们是如何构成风险的,结合电力通信网对各个因素的概念分类进行了阐述。通过建立树状图模型,得出各个因素之间的对应关系,对其合理赋值,通过计算得出了风险值,最后通过实例对模型进行了验证。

Copyright of Coal Geology & Exploration is the property of Xian Research Institute of China Coal Research Institute 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 Cyber Security & Data Governance is the property of Editorial Office of Information Technology & Network Security 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 Materials Engineering / Cailiao Gongcheng is the property of Journal of Materials Engineering 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 Coal Science & Technology (0253-2336) is the property of Coal Science & Technology 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 Coal Science & Technology (0253-2336) is the property of Coal Science & Technology 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 Coal Geology & Exploration is the property of Xian Research Institute of China Coal Research Institute 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 Tea Science is the property of Journal of Tea Science 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 Cotton Textile Technology is the property of Cotton Textile Technology 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 Coal Geology & Exploration is the property of Xian Research Institute of China Coal Research Institute 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.)

The preparation methods of superhydrophobic materials, such as electrospinning, sol-gel, deposition, etching and coating, are reviewed and analyzed. At the same time, combined with the research status at home and abroad in recent years, the latest research progress of superhydrophobic materials as oil-water separation materials is described; in addition, the existing problems in the preparation and application of superhydrophobic materials were summarized, and some suggestions were summarized. At the same time, the development trend of the preparation and application of superhydrophobic materials in oil-water separation was summarized, and the application prospect was prospected. [ABSTRACT FROM AUTHOR]

Objective·To investigate ciprofloxacin heteroresistance in Pseudomonas aeruginosa (PA). Methods·Ciprofloxacin heteroresistance in 227 clinical PA strains was initially identified by disk diffusion. Meanwhile, susceptibilities of these strains was classified according to the diameter of the inhibition zone. The stability of the identified heteroresistant strains was tested by measuring the sensitivity after serial passage under antibiotic-free conditions. Mechanisms mediating heteroresistance were analyzed by whole-genome sequencing. Susceptibilities of resistant subpopulations to different antibiotics were also detected. Results·Based on disk diffusion, 142 (62.6%), 26 (11.5%), and 59 (26.0%) of 227 isolates were classified as susceptible, intermediate and resistant to ciprofloxacin respectively. Eighteen putative heteroresistant strains were detected through primary disk diffusion selection, and 11 among them were further verified as stable heteroresistant strains by population analysis profiling (PAP). By whole-genome sequencing, 8 and 2 among 11 resistant subpopulations carried mutations in mexS and mutations in gyrA individually. In addition, mutations in fleQ, PA2632 or PAKAF_02255 were detected respectively. Both mexS and gyrA mutants led to moxifloxacin resistance, and some mexS mutants also showed resistance to chloramphenicol and imipenem. Conclusion· Ciprofloxacin heteroresistance rate in PA is 4.8% (11/227). As a screening method for heteroresistance of PA, the disk diffusion has low sensitivity and has a certain false negative rate. The mutation mexS is the predominant mutation type in resistant subpopulations and it might enhance the overexpression of efflux pump MexEF-OprN, thus mediating resistance to different antibiotics including ciprofloxacin. [ABSTRACT FROM AUTHOR]

Copyright of Chinese Journal of Tissue Engineering Research / Zhongguo Zuzhi Gongcheng Yanjiu is the property of Chinese Journal of Tissue Engineering Research 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 Transactions of the Chinese Society of Agricultural Engineering is the property of Chinese Society of Agricultural Engineering 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 Chinese Journal of Tissue Engineering Research / Zhongguo Zuzhi Gongcheng Yanjiu is the property of Chinese Journal of Tissue Engineering Research 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 Chinese Journal of Oil Crop Sciences is the property of Oil Crops Research Institute of Chinese Academy of Agricultural Sciences 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: Human subpatellar fat pad is a kind of waste, which is often removed in total knee arthroplasty. If it is fully utilized, it can be used as a source of mesenchymal stem cells. OBJECTIVE: To explore the methods of isolation, culture and identification of human infrapatellar fat pad derived stem cells in vitro, to induce chondrogenic differentiation under specific conditions, and to explore the feasibility of being used as seed cells for cartilage tissue engineering. METHODS: The discarded infrapatellar fat pad from eight patients undergoing the total knee arthroplasty was obtained and human infrapatellar fat pad derived stem cells were isolated and cultured according to trypsin digestion, type I collagenase digestion and differential adherence methods. After being cultured to the third generation in vitro, cell morphology observation, cell growth curve and cell surface antigen analysis were performed. In addition, chondrogenic differentiation was induced, and human infrapatellar fat pad derived stem cells were identified by immunohistochemistry, toluidine blue staining and RT-qPCR. RESULTS AND CONCLUSION: (1) Isolated, purified and cultured human infrapatellar fat pad derived stem cells showed spindle-shaped adherent growth. The growth curve of the third generation of human infrapatellar fat pad derived stem cells was in the shape of "S". Cells were positive for CD44 and CD105, while negative for CD45. (2) After 14 days of induction, immunohistochemical staining and toluidine blue staining were positive in the differentiation group, and the relative gene expression levels of ACAN, BMP-2, COL2A1 and SOX-9 were significantly higher than those in the blank control group. (3) This study confirmed that mesenchymal stem cells with differentiation potential could be isolated from infrapatellar fat pad, which had strong proliferation ability and chondrogenic differentiation ability in vitro, and were expected to become ideal seed cells for cartilage tissue engineering. [ABSTRACT FROM AUTHOR]

Copyright of Mycosystema is the property of Mycosystema Editorial Board 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 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 Chinese Journal of Tissue Engineering Research / Zhongguo Zuzhi Gongcheng Yanjiu is the property of Chinese Journal of Tissue Engineering Research 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 China Textile Leader is the property of China Textile Information Center 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 Henan Agricultural Sciences is the property of Editorial Board of Journal of Henan Agricultural Sciences 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 Chinese Journal of Tissue Engineering Research / Zhongguo Zuzhi Gongcheng Yanjiu is the property of Chinese Journal of Tissue Engineering Research 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 Acta Prataculturae Sinica is the property of Acta Prataculturae Sinica 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 Modern Medicine & Health is the property of Journal of Modern Medicine & Health 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 Materials Engineering / Cailiao Gongcheng is the property of Journal of Materials Engineering 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 Chinese Journal of Explosives & Propellants is the property of Chinese Journal of Explosives & Propellants 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 Chinese Journal of Explosives & Propellants is the property of Chinese Journal of Explosives & Propellants 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 Henan Agricultural Sciences is the property of Editorial Board of Journal of Henan Agricultural Sciences 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 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.)

Aiming at the problem of automated control of high-level grain unloading mechanism in combine harvester, the mechanical structure, manual control process and circuit configuration of combine harvester were studied, mechanism structure and movement principle analysis of unloading grain and two degrees of freedom were carried out, and the problem of inefficiency of combine harvester was summarized. A high automated unloading system control system of combine harvester was put forward to operate logic of two-order optimization, the minimum number of position sensor system and the fool automated control algorithm design, the completion of the relevant hardware and software were designed and development, and Star 4 LZ-5. 0 Z crawler self-propelled full-feed combine harvester field test and operation comparison were done. The results indicate that the automatic unloading mechanism takes 5. 3 s, compared with the manual adjustment time reduced 4 times, increase unloading efficiency, and has unloading grain simple operation, and so on. [ABSTRACT FROM AUTHOR]

The fermentation conditions of Clostridium tyrobutyricum RL1 isolated from Luzhou-flavor liquor pit mud for the production of butyric acid was optimized using one-factor experiment combined with orthogonal experiment. The results showed that the optimal yield of butyric acid termentation of Clostridium butyrium RL1 was the initial pH value 6.8, the volume of culture media 100%, the culture temperature 34°C, the inoculation amount 3% (volume fraction) and the dosage of the deoxidizer (sodium thioglycolate) 0. 5 g/L. Under the optimal fermentation conditions, the production of butyric acid by Clostridion tyrobutyricum RL1 reached 10. 66 g/L, which was 41. 76% higher than that before optimization. [ABSTRACT FROM AUTHOR]

With respect to the multiple stable two-sided matching decision-making problem considering the approve difference and approve tolerance, a novel decision-making analysis method is proposed. Firstly, the definitions of stable, weak stable and strong stable matching alternatives are given, and the theoretical analyses regarding the inclusion, popularity and Pareto efficiency for three kinds of stable matching alternatives are conducted. Then, the methods for calculating satisfaction degrees are given by considering the ordinal value vectors provided by two-sided matching party. Further, the optimization models for the targets of satisfied, weak satisfied and stable, strong satisfied and stable are built, respectively. By using a changeable step algorithm, the corresponding optimal matching alternative is obtained. Finally, an example is given to illustrate the efficiency and feasibility of proposed method. [ABSTRACT FROM AUTHOR]

To investigate the types and distribution of coal resources in Northern Qinghai Tibet plateau, the coal geological background and characteristics of coal resources in Northern Qinghai Tibet plateau were investigated. On the basis of field survey, typical samples test analysis and comprehensive analysis, the main coal area are divided into early Carboniferous and late Carboniferous, late Permian, late Triassic, early and middle Jurassic. Coal measures are mainly distributed in the Kunlunshan, Jishishan, Tanggulanshan, Tumen-Baqing, Changdu-Mangkang coal belt, etc. The main products related with coal include coal, coal unconventional gas,natural gas hydrate, coal gallium, coal germanium, coal gypsum, coal kaolin and high-quality limestone, etc. Under the action of coal forming environment, coalification and tectonic evolution, Coal-Germanium in coal symbiotic deposit formed in Gama Yangqu region; Coal-coal gas-gas hydrate symbiotic deposit formed in Kaixinling-Wuli region. The formations of T3bg, P3n, C1zd and C2j all have the potential of forming coal-coal gas-coal shale gas hydrate symbiotic deposit. [ABSTRACT FROM AUTHOR]

The study of metal element mineral resources in coal is the focus in the field of coal geology,and it has important strategic significance for the transformation of China’ s coal industry. In order to systematically sort out the status quo of mineral resources in China’ s coal,to promote the comprehensive investigation and utilization of mineral resources in coal,to expand the development direction of traditional coal geological industry,In this paper,based on the systematic collection of relevant geological data, sampling test, comprehensive analysis and research, Through the systematic discussion, the concept of mineral resources mineral resources in coal is put forward,the concept of the main metal element mineral resources in coal is put forward,and the distribution characteristics of gallium, germanium and lithium in coal are summarized. By analyzing the source, sedimentary environment and tectonic-thermal evolution conditions, the distribution characteristics of gallium, germanium and lithium resources in China’ s coal. The copper and gallium enrichment areas in China are mainly distributed in the two coal-forming stages of the Carboniferous-Permian and South China Permian in China. The germanium in coal is mainly distributed in the northeast early chalk The control of germanium, gallium and lithium metal in coal is characterized by regional distribution, At the same time, combined with the current coal mineral resources in the forefront of mineral resources research problems, the future research direction of metal element mineral resources in China is prospected. Proposed to focus on strengthening the coal metal element testing technology and enrichment of mineralization mechanism of the study, Which is of guiding significance for the comprehensive development and utilization of mineral resources in China. [ABSTRACT FROM AUTHOR]