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Copyright of Paint & Coatings Industry (0253-4312) is the property of Paint & Coatings Industry 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 Acta Scientiarum Naturalium Universitatis Sunyatseni / Zhongshan Daxue Xuebao 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.)

Copyright of Xinjiang Agricultural Sciences is the property of Xinjiang Agricultural Sciences Editorial Department 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.)

BACKGROUND: The self-renewal and multi-directional differentiation of pluripotent stem cells possess the potential to revolutionize people’s understanding of biology, medicine, development, and disease. Stem cells play an important role in the early stage of embryonic development, and the study of them could be beneficial to understanding of the basic principles of biological development and tissue or organ formation, exploring the potential mechanisms of various diseases, studying the repair and regeneration of damaged tissues or organs, and promoting drug discovery and personalized treatment. OBJECTIVE: To review the research progress of pluripotent stem cells, summarize and categorize the fundamental types of pluripotent stem cells, and elucidate the lineage situations of various types of pluripotent stem cells in common mammals. METHODS: PubMed, Web of Science, CNKI, and WanFang databases were searched systematically, with the keywords “pluripotent stem cells; embryonic stem cells; induced pluripotent stem cells; expanded potential stem cells; livestock pluripotent stem cells” in English and Chinese. The 99 articles related to mammalian pluripotent stem cells were systematically screened according to inclusion and exclusion criteria, and then reviewed. RESULTS AND CONCLUSION: (1) According to classical theory in mouse embryonic stem cell research, the pluripotent state of stem cells is divided into two forms: naïve and primed. Naïve state corresponds to the inner cell mass of pre-implantation embryos before attachment to the uterine wall, while primed state corresponds to the epiblast after implantation. These two states exhibit significant differences in epigenetic features, transcriptional activity, external signal dependency, and metabolic phenotype. It is later discovered that there is an intermediate state between naïve and primed called formative pluripotency. Therefore, the pluripotency of pluripotent stem cells is a continuous developmental process rather than a unique cell state. (2) In addition to obtaining pluripotent stem cells from the inner cell mass, there are various methods and lineages for acquiring pluripotent stem cells, including embryonic germ cells established using primitive germ cells from mouse embryos, induced pluripotent stem cells created by the dedifferentiation of adult mouse and human fibroblasts with four factors-Oct3/4, Sox2, c-Myc, and Klf4; embryonic stem cell-like cell lines cultured from somatic cell nuclear transfer, parthenogenesis, neonatal or adult testicular or ovarian tissue, very small embryonic-like stem cells derived from various adult tissues and expanded pluripotent stem cells derived from pre-implantation stages. These pluripotent stem cells all share the common characteristics of continuous self-renewal, expressing core pluripotency factors and possessing the ability to differentiate into the three primary germ layers. (3) Currently, pluripotent stem cells are being used for disease modeling to study the mechanisms of various diseases and develop new drugs. Simultaneously, scientists are attempting to use pluripotent stem cells to cultivate various tissues and organs, offering new possibilities for regenerative medicine and transplantation. However, the clinical application of pluripotent stem cells faces safety challenges, including issues of cell mutations and immune rejection. Continual improvement in the methods of generating pluripotent stem cells will make them safer and more efficient for clinical applications. (4) Based on the methods of obtaining and lineage establishment of pluripotent stem cells in mice and humans, various types of pluripotent stem cells have been established in livestock, including embryonic stem cells, induced pluripotent stem cells, germ lineages of pluripotent stem cells, and expanded potential stem cells. Research on livestock pluripotent stem cells opens up new avenues for animal reproduction, breeding, genetic engineering, disease modeling, drug screening, and the conservation of endangered wildlife. [ABSTRACT FROM AUTHOR]

Copyright of Science Technology & Engineering is the property of Chinese Society of Technology Economics 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 Computer Engineering & Applications is the property of Beijing Journal of Computer Engineering & Applications Journal Co Ltd. 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 Experimental Technology & Management is the property of Experimental Technology & Management 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 Bulletin of the Chinese Ceramic Society is the property of Bulletin of the Chinese Ceramic Society 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 China Brewing is the property of China Brewing 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 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 Journal of Anhui Agricultural Sciences is the property of Journal of Anhui Agricultural Sciences 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.)

Phase change nanocapsules (NEPCM) with n-octadecane (C18) phase change material as the core material and silica (SiO2) as the shell material were prepared by sol-gel method. A silane coupling agent, 3-Aminopropyltriethoxysilane (APTES), was added to functionalize the SiO2 surface. In addition, the addition of APTES promoted the hydrolysis and condensation of Tetraethyl orthosilicate (TEOS) to form a dense SiO2 shell layer. The effects of different core/shell mass ratios on the microscopic morphology and phase change enthalpy of NEPCM were investigated. Meanwhile, the properties of NEPCM, such as thermal cycling stability, leakage prevention, thermal stability, and temperature regulation of the interior of the building, were also studied in detail. The results showed that the phase change enthalpy of NEPCM changed with the change of core/shell mass ratio. At the core/shell mass ratio of 1/1.3, the phase change enthalpy of the prepared nanocapsules was the highest, reaching 140.57 J/g, with an encapsulation rate of 61.6%. Meanwhile, due to the protection of dense SiO2 shell material, NEPCM had good leakage prevention compared with pure C18. Its enthalpy only decreased by 0.13% after 150 heating-cooling cycles, which exhibited excellent thermal cycle stability and durability. In addition, when NEPCM was used in building thermal management, it effectively delayed the time for the indoor temperature to reach the peak temperature by 385 s and reduced the peak temperature by 9 ℃, which indicated that NEPCM had excellent thermal storage and thermoregulation performance. Meanwhile, the addition of APTES functionalized the NEPCM shell, and the efficient interactions between the surface amino groups and the functional groups of the organic polymer provided a broad application prospect for the efficient preparation of nanocomposites. [ABSTRACT FROM AUTHOR]

The China-India border dispute is the biggest obstacle to the development of China-India relations. The existing studies on the China-India border dispute do not pay enough attention to geographical factors and lack comprehensive analysis of multi-agent and multi-scale, so it is difficult to grasp the essential characteristics and overall situation of the China-India border issue. This paper proposes a multi-scale geopolitical analysis framework to analyze the competitive nature of contemporary China-India border dispute under the joint action of multi-scale and multi-agent. The main conclusion is that the contemporary China-India border dispute is a complex problem caused by multi-scale spatial superposition and multi-agent power game. On the global scale, the China-India border dispute is an important part of the strategic interaction be‐ tween the United States and India to contain China; At the regional scale of South Asia, China-India border dispute is a land blockade for India and its partner countries to restrict China's expansion of influence in South Asia; On the bilateral scale of China and India, India regards the China-India border dispute as a strategic fulcrum to seek land advantages over China, and tries to gain strategic advantages over China on both land and sea; At the national internal scale, the China-India border dispute is a competition between China and India in the border transformation mechanism; At the border area scale, the China-India border dispute is a competition between the two countries in terms of their ability to effectively manage border areas. The national inter‐ nal scale is the core scale that determines the China-India border dispute, but the possibility of the two countries reaching a reasonable compromise on this scale is still very small in the short term. The current situation of the global, South Asian region, and bilateral scale is not conducive to a rational solution of the China-India border dispute. The border area scale is the main focus of the China-India border dispute for a long time. [ABSTRACT FROM AUTHOR]

Objectives: Pixel offset tracking (POT) for optical remote sensing imagery is widely used to invert coseismic deformation fields and monitor landslides. Traditional pixel offset tracking method estimates the displacement of the central pixel by searching for the matching window with the highest correlation, which is computationally inefficient and suffers from inaccurate deformation boundary extraction due to the decoherence effects in the region with dynamical deformation. We introduce the optical flow field model commonly used in computer vision to the pixel offset tracking problem to obtain accurate surface deformation efficiently. Methods: The optical flow field method applicable to optical remote sensing images and the improved inversion algorithm for the time series analysis are proposed to inverse the surface deformation. Experiments on the simulated coseismic deformation fields in Tajikistan are detailed to assess the feasibility and the minimum detectable deformation of the optical flow field method. The advantages of the proposed method over computational cost and deformation boundary extraction accuracy are illustrated by the co-seis‐mic deformation field of the California earthquake and the displacement of the Baige landslide. Further‐ more, the performance on estimating large gradient deformation and the robustness of the improved time series inversion algorithm are discussed by analyzing the time series deformation of the Baige landslide. Results: The results show that compared with the traditional window correlation matching method, the optical flow field method has an offset tracking accuracy of 0.032 pixel, which improves the computational efficiency by about 20 times, and the accuracy of the deformation zone is improved by 25.9%. The time series weighted inversion algorithm reduces the uncertainties in the estimation of east-west and north-south dis‐ placements of optical remote sensing images by 16.2% and 12.4%, respectively. Conclusions: The pro‐ posed method alleviates the pixel offset tracking problem in the boundary region with large gradient deformation [ABSTRACT FROM AUTHOR]

Copyright of Rolling Stock (1002-7602) is the property of Rolling Stock 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 Bulletin of the Chinese Ceramic Society is the property of Bulletin of the Chinese Ceramic Society 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 Soil & Water Conservation (1009-2242) is the property of Institute of Soil & Water Conservation 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 Geological Hazard & Control is the property of China Institute of Geological Environmental Monitoring (CIGEM) Editorial Department 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 Science & Technology of Food Industry is the property of Science & Technology of Food Industry 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 Applied Mechanics is the property of Chinese Journal of Applied Mechanics 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.)

BACKGROUND: The appearance of the crescent sign in femoral head necrosis is a “turning point” in the progression of the disease, and repairing and stabilizing the bone-cartilage interface is particularly important in preventing further progression and collapse of the femoral head. Tissue engineering offers potential advantages in the simultaneous repair and integration of the bone-cartilage interface. OBJECTIVE: To review potentially suitable techniques addressing the subchondral separation in femoral head necrosis. METHODS: Relevant articles from January 1970 to April 2023 were searched in PubMed, Web of Science, and China National Knowledge Infrastructure (CNKI) using English search terms “femoral head necrosis, avascular necrosis of femoral head, osteonecrosis of femoral head” and Chinese search terms “femoral head necrosis, subchondral bone, cartilage, integration of cartilage and subchondral bone”. A total of 114 articles were included for review and analysis. RESULTS AND CONCLUSION: (1) Structural defects, ischemic and hypoxic environment, inflammatory factors, and stress concentration may cause subchondral separation in osteonecrosis of the femoral head. Subchondral bone collapse and failure of hip-preserving surgery may be associated. Integration of tissue engineering scaffolds with the bone-cartilage interface is one potential approach for treating subchondral separation in osteonecrosis of the femoral head. (2) Current literature suggests that multiphase scaffolds, gradient scaffolds, and composite materials have shown improvements in promoting cell adhesion, proliferation, and deposition of bone and cartilage matrix. These advancements aid in the integration of scaffolds with the bone-cartilage interface and have implications for the treatment of subchondral separation in osteonecrosis of the femoral head. (3) Surface modifications of scaffolds can enhance interface integration efficiency, but they have their advantages and disadvantages. Scaffolds providing different environments can induce differentiation of mesenchymal stem cells and facilitate integration between different interfaces. (4) Future scaffolds for subchondral separation in osteonecrosis of the femoral head are expected to be composite materials with gradient and differentiated biomimetic structures. Surface modifications and stem cell loading can promote integration between the bone-cartilage interface and scaffolds for therapeutic purposes, but further experimental verification is still needed. Challenges include synchronizing scaffold degradation rate with repair progress and ensuring stability between different interfaces. [ABSTRACT FROM AUTHOR]

Copyright of Machine Tool & Hydraulics is the property of Guangzhou Mechanical Engineering Research Institute (GMERI) 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.)

In this paper, we prepare m-Bi2 O4 via a simple hydrothermal method, and analyze its structure, morphology, surface valence and piezoelectric photocatalytic performance using characterization methods such as XRD, XPS, SEM, TEM, UV-vis DRS and PFM. Furthermore, we test the piezoelectric photocatalytic activity of the material using sulfamethazine (SM) as a simulated pollutant. The results show that m-Bi2 O4 outperforms BaTiO3 and BiOCl in catalytic performance, indicated by its high SM degradation efficiency (96.46%) after 60 min of synergistic piezoelectric-light action, and m-Bi2 O4 still holds high catalytic activity under weakening light energy. In addition, superoxide radicals with high oxidation activity and a small amount of hydroxyl radicals and singlet oxygen have been captured in the reaction system. We also propose a possible mechanism of piezoelectric photocatalysis. [ABSTRACT FROM AUTHOR]

Copyright of Nonferrous Metals Engineering is the property of Beijing Research Institute of Mining & Metallurgy Technology Group 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 Xinjiang Agricultural Sciences is the property of Xinjiang Agricultural Sciences Editorial Department 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.)

Different property mismatched laboratory specimens with sandwich structure and center crack that contain the single-edge-notched bend（ SENB）,compact tension（ CT）,single edge-notched tensile（ SENT）,and central-cracked tension（ CCT） specimens were selected,and the FEM simulations based on GTN（ Gurson-Tvergaard-Needleman） damage model were used to further investigate the influence of property mismatch on the effect range of material constraint.The results show that the numerical value of the effect range is also influenced by the property mismatch.The effect range increases with increasing of the property mismatch.In addition,the strength of property mismatched structure has buckets effect,and the buckets effect is more obvious in high property mismatched structure.In the future,the correlation of the effect range of material constraint with geometry constraint and material constraint should be established,and the results can provide scientific support for the structure integrity assessment and the design of property mismatched structures.

Copyright of Mechanical & Electronic Control Engineering is the property of Omniscient Pte. Ltd. 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 Water Conservancy & Electric Power Technology & Application is the property of Omniscient Pte. Ltd. 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.)

本研究主旨為分析臺、中、日、韓四國之國中小英語政策，解析臺灣2030年雙語國家政策之可行性。透過文獻整理，爬梳四國之國中小英語課程之起始年齡、授課時數、教學方法、單字量、本國籍英語教師與外籍師資、教科書與未來英語教育政策等八大面向，經由比較四國英語政策之相似處與相異處，提供意見供相關政策參酌。研究發現，除了日本於2020年起從國小五年級開始上英語課，臺、中、韓三國之英語政策皆將英語課的起始年齡調整為國小三年級，英語課的教學法皆改為使用以溝通為導向之教學法為教學的核心理念。本研究針對臺灣現行國小英語政策提出五點建議：一、臺灣在國小階段的單字量可再斟酌增加；二、臺灣在國中階段的英語課總時數可調整；三、運用AI人工智慧科技於英語教學中；四、建立更健全的英語師資培訓系統；五、需建立謹慎的外籍師資遴選制度與配套措施。 This study examined the English education policies for elementary and junior high schools in Taiwan, China, Japan, and South Korea to evaluate the feasibility of practicing the “Bilingual Nation by 2030” policy in Taiwan, and the English education policies in these countries were compared. This study focuses on the following eight aspects: the starting age of English education, total English lesson hours, English teaching methodology, assigned English vocabulary, English teacher training, native-English-speaking teacher recruitment, textbooks and teaching materials, and future policy. This study provides two major observations: First, three of the aforementioned countries begin English lessons in Grade 3. However, Japan begins in Grade 5. Second, all of the countries currently employ a communicative approach as their English teaching method. This study further provides five suggestions for future policy: First, more advanced English vocabulary should be taught at the elementary school level. Second, the number of English lesson hours for students should be increased. Third, English teachers in Taiwan should utilize artificial intelligence in their teaching of English. Fourth, training courses for English teachers should be improved. Finally, the processes of recruiting and supporting English teachers from foreign countries should be planned appropriately.

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 Applied Chemical Industry is the property of Shaanxi Research Design Insitute of Petroleum & Chemical Industry 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 Urban Geology is the property of Urban Geology 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 Feed Research is the property of Editorial Board of Feed 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.)

The Xiaorequanzi deposit is a volcanic massive sulfide (VMS) deposit that occurred in Carboniferous volcano-sedimentary sequence, which is located in the western section of Dananhu-Tousuquan arc belt. East Tianshan, Critical metals such as Se are associated with Xiaorequanzi VMS deposit. However. Se occurrence status and enrichment mechanism are ambiguous, which restricts the comprehensive utilization of St. Based on previous research on the geological characteristics of ore deposits, the automated integrated mineral analysis and electron probe micro-analysis on sulfides in different mineralization stages of ore were used to explore Se occurrence status and enrichment mechanism in the Xiaorequanzi deposit. The results show that Se occurs as independent mineral. namely clausthalite, or exists in the lattice of sulfide. Clausthalite occurs in a subhedral to anhedral shape with particle size less than 30 µm. which is encapsulated in chalcopyrite of exhalative sedimentary period and late hydrothermal overprinting period. The Se, S, and Pb contents of clausthalite are 20. 25%-23.87%, 1.11%-2.61%, and 72.49% 76.57%, with an average of 22. 15%, 1.92%, and 74.51%. The average S/Se ratio is 0.087. and the average chemical formula of clausthalite is Pb (Seo. 78 S, 17). The Se contents of pyrite, chalcopyrite, and sphalerite are 0.07%, 0.15% and 0.29%, and the average S/Se ratios are 716, 222 and 110. The average content of Se and S/Se ratio of sulfide in effusive deposit period are 0.20% and 212. The average content of Se and S/Se ratio of sulfide in the late hydrothermal overprinting period are 0.05% and 938, which show a decreasing trend of Se content. Combined with the results of previous fluid inclusion studies. Se enrichment mechanism in the Xiaorequanzi deposit is attributed to the magmatic fluid with higher temperature and higher oxygen fugacity, while Se mineralization weakens followed by the decreasing of oxygen fugacity and temperature. [ABSTRACT FROM AUTHOR]

Rare earth ion-doped inorganic photochromic materials can be applied in the field of optical information storage by coupling photochromism with photoluminescence intensity modulation. The development of materials with dual-mode luminescence modulation properties using a multiphoton absorption strategy is an effective means to enhance the lifetime of optical information storage. In this study, ceramics with du al-mode luminescence and light intensity modulation properties were prepared by selecting Ho3+ and Yb3+ co-doping with calcium stannate as the host. The ceramic produces intense green and red emission in the visible region under 461 nm blue light excitation. Under the excitation of 980 nm near-infra red light, the ceramics appear three visible emission bands centered at 551 nm, 669 nm and 756 nm. The mechanism of up-conversion luminescence is discussed, and the results show that ceramic up-conversion luminescence is related to the two-photon process. 365 nm UV light irradiation of ceramic up--conversion and down-conversion luminescence intensity of attenuation modulation phenomenon, the green luminescence modulation effect is better than the red. Information on the distribution and depth of traps inside the ceramics was obtained by thermoluminescence spectroscopy tests, proving the existence of carrier traps. The results of fluorescence lifetime tests and luminescence kinetics tests before and after UV irradiation showed that the light intensity decay was related to the energy transfer from the luminescence center to the trap center. [ABSTRACT FROM AUTHOR]

Copyright of Hydrogeology & Engineering Geology / Shuiwendizhi Gongchengdizhi is the property of Hydrogeology & Engineering Geology 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.)

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Copyright of Industrial Water Treatment is the property of CNOOC Tianjin Chemical Research & Design 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 Ordnance Equipment Engineering is the property of Chongqing University of 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.)

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Copyright of Journal of Data Acquisition & Processing / Shu Ju Cai Ji Yu Chu Li is the property of Editorial Department of Journal of Nanjing University of Aeronautics & Astronautics 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.)

Objective To measure China' s medical resources mismatch index, to analyze the differences in the spatial distribution of medical resources mismatch, and to clarify the specific path to improve the mismatch of medical resources. Methods Based on the 2009 - 2021 data, China's medical capital and labor mismatch indices were measured, the spatial and temporal evolution characteristics and sources of differences were analyzed using Dagum' s Gini coefficient and its decomposition method, and the fsQCA method was used to analyze the conditional groupings of high or low medical resource mismatches. Results There were different degrees of capital mismatch or labor mismatch in each region. The overall Gini coefficient showed an, r inverted V, revolution trend, the overall Gini coefficient within the region showed a fluctuating downward trend, and the overall Gini coefficient between regions was more complicated. Inter 一 region differences were the most important factor in the differences in the spatial allocation of medical resources. There were two types of pathways that lead to a high medical resource mismatch, i. e., labor 一 labor mismatch index and labor 一 labor mismatch index. There were 2 types of paths, i. e., labor force 一 hospital structure dual 一 driven (Hl) and service level auxiliary 一 driven (7/2), and 2 types of paths leading to low medical resource mismatch, i. e., urbanization 一 hospital structure 一 service level linkage - restricted (£1, L2) and internal and external linkage 一 restricted (L3, Z4). Conclusion It's supposed to play themacro - controlrole for the government to promote the rational allocation of regional medical resources, take the medical association as an important hand to play the leading role of tertiary hospitals, and fully implement the development strategy of new type of urbanization and lower the threshold of population settlement. [ABSTRACT FROM AUTHOR]