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金属带式无级变速器（Metal V-belt Type Continuously Variable Transmission,CVT）通过摩擦传动,带轮与金属带之间始终存在滑移,该特性区别于有级式变速器。为了研究CVT传动系统在瞬态激励下的扭振响应,根据某型号CVT主、从动带轮与金属带之间摩擦系数的实验数据,建立该传动系统数学模型并进行仿真试验,将该模型在低速比下的扭振响应与有级式变速器在瞬态激励下的扭振响应进行对比。结果显示,由于滑移率的存在,瞬态激励下CVT传动系统不会发生典型的shuffle现象,而是表现出高频低幅的振动特性,没有与车身发生共振。

文章介绍了利用现代通信技术和地理信息技术,针对电力巡检特殊要求开发出的一种基于气压海拔高度测量、支持通用分组无线业务（GPRS）无线双向通信与断点续传、地图可定制的高精度定位导航系统。阐述了该高精度定位导航系统的设计原则及其模块化功能,介绍了该系统相比于传统定位导航系统的优点,最后介绍了该系统的应用实例。

Copyright of Journal of Northwest A & F University - Natural Science Edition is the property of Editorial Department of Journal of Northwest A&F University (Natural Science Edition) 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 Synthetic Crystals is the property of Journal of Synthetic Crystals 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 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 Geodesy & Geodynamics (1671-5942) is the property of Editorial Board Journal of Geodesy & Geodynamics 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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A new nickel complex [Ni(dpyb)2 ](NO3)2 ·(H2 O)3 was synthesized by means of solvent-thermal synthesis using 2,6-bis(2-pyrazinyl)-3,4′-bipyridine (dpyb), which is one of polynitrogen compounds, as the ligand and Ni(NO3)3 ·6H2 O as raw materials. The structure of the complex [Ni(dpyb)2 ](NO3)2 ·(H2 O)3 was characterized by X-ray single crystal diffraction, infrared spectroscopy and Raman spectroscopy. The results of structural analysis show that the complex was a mononuclear structure, and the mononuclear structure is further extended to the binuclear structure through intermolecular hydrogen bonds between the mononuclear units. The Hirshfeld surface analysis of the target complex was carried out using Crystal Explorer 21 software, and the results show that there is strong hydrogen bonding in the structure of [Ni(dpyb)2] (NO3)2 ·(H2 O)3. The frontline molecular orbitals and energy band gaps of the free ligand and the complex were also calculated by Gaussian 09W and Gauss View 5. 0 software using the B3LYP/6-311G (d, p) method, and the results suggest that the complex has high chemical stability. The results of the computational study are in good agreement with the experiments. In addition, fluorescence analysis of the free ligand and complexe were performed, and the results indicate that compared with the free ligand, the fluorescence intensity of the complex is weakened, which is due to the coordination between the ligand and the Ni(II) ion. [ABSTRACT FROM AUTHOR]

Copyright of China Population Resources & Environment is the property of Shandong Normal 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 Journal of Drainage & Irrigation Machinery Engineering / Paiguan Jixie Gongcheng Xuebao is the property of Editorial Department of Drainage & Irrigation Machinery 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.)

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In order to explore the removal mechanism and influence law of grinding force in grinding SiC ceramics, the simulation model of single abrasive striking SiC ceramics was established based on the SPH (smoothed particle hydrodynamics) method, and the crack generation and propagation mechanism during grinding SiC ceramics were analyzed; the effect of grinding velocity (vs), feeding rate (vw) and grinding depth (ap) on the removal mechanism, the normal grinding force and tangential grinding force of grinding SiC ceramics were analyzed by the single factor experiment. The results showed that the abrasives striking the workpiece lead to the generation of the median cracks and the transverse cracks. With the increase of abrasive pressing depth, the transverse crack expands to the material surface, and when the transverse crack expands to the material surface, the brittle fracture occurs. With the increase of vs, the decrease of vw and ap, and the decrease of the area and depth of the pits on the grinding surface, the plastic removal area becomes larger, and the normal grinding force and tangential grinding force both decrease. These results may provide an important basis for high‐efficiency and low‐ damage machining of SiC ceramic components. [ABSTRACT FROM AUTHOR]

Semiliquidambar cathayensis is treated as a grade-two protected plant in China. However, its phylogenetic relationships with species from Hamamelidaceae and Altingiaceae remain unclear. In order to analyze the phylogenetic relationships and adaptive evolution of chloroplast genomes between S. cathayensis and its closely related taxa including species from Hamamelidaceae and Altingiaceae, we reconstructed the maximum likelihood tree and the Bayesian tree to discover the phylogenetic relationships between S. cathayensis and its closely related taxa from 24 sequences that representing 22 species, and further detected the correlation between adaptive sites and selective pressure of protein coding genes under varying models including site model, clade model and branch model. Altingiaceae clade was chosen as the foreground clade. The results were as follows: (1) A total of 133 genes were annotated, including 88 protein-coding genes (11 genes with intron), 37 tRNA genes and eight rRNA genes. (2) Eight chloroplast genomes representing eight species from S. cathayensis and Altingia, Liquidambar were relatively conservative in sequence length, gene number and composition, GC content, and there was not obvious diversity in the four boundaries. Relatively high variation interspecific were also detected in LSC and SSC regions among these eight chloroplast genomes, while the IR regions were high conservatism. (3) Phylogenetic trees showed that S. cathayensis and sampled species of Altingiaceae clustered a group, which further divided into three clades, namely Clade I, Clade Ⅱ and Clade Ⅲ. The phylogenetic relationships among these clades remain unclear due to hybridization or incomplete lineage sorting (ILS)according to the results of test of ILS. (4) The chloroplast genes such as ndhA, ndhG and rps12 were subjected to selection pressure under the clade model and branch model. Furthermore, 28 sites of ten genes were detected under positive selection with P-value greater than 0.99 based on the site model, which may be related to the adaptive evolution of Altingiaceae. In this study, the results of plastid phylogenomics supports that S. cathayensis belongs to Altingiaceae. Several coding genes among these species of Altingiaceae may have adaptive evolution. These results will provide data for the further resource protection of homonym drugs and pharmacognostic researches of ethnodrug. [ABSTRACT FROM AUTHOR]

Copyright of Natural Gas Industry is the property of Natural Gas Industry Journal Agency 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 Light Industry Machinery is the property of Light Industry Machinery 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 Clinical Pediatric Surgery is the property of Journal of Clinical Pediatric Surgery 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.)

To cope with the energy crisis and environmental degradation, the European Union has put energy transition at the top of its policy agenda. Thanks to the progress of the energy transition, the EU has strengthened its collective energy security, enhanced its international competitiveness, and improved its environmental quality. The EU’s energy transition prospects depend on how the EU and member states balance collective security with national interests, short-term needs with long-term ambitions, and strategic autonomy with external dependence. China and the EU share common security concerns and interests in promoting energy transition. Both sides can actively engage in energy dialogue and encourage cooperation at various levels, including global governance, bilateral relations, and specific industries, to jointly accelerate the global energy transition. The energy cooperation between China and the EU will not only improve their respective energy security, but also contribute to global sustainable development. [ABSTRACT FROM AUTHOR]

Copyright of Journal of South China Agricultural University is the property of Gai Kan Bian Wei Hui 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 Engineering Geology / Gongcheng Dizhi Xuebao is the property of Journal of Engineering Geology 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 Electric Machines & Control / Dianji Yu Kongzhi Xuebao is the property of Electric Machines & 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.)

Copyright of Journal of Engineering for Thermal Energy & Power / Reneng Dongli Gongcheng is the property of Journal of Engineering for Thermal Energy & Power 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.)

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Copyright of Chinese Journal of Clinical Healthcare is the property of Chinese Journal of Clinical Healthcare 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.)

[Purpose/Significance] This article attempts to establish a scientifically effective set of management standards, create a standardized workflow, and fully consider the role of the artificial intelligence generated content (AIGC) in the standardized management of reading promotion. It aims to build a management standard for reading promotion that is in line with the high-quality development of libraries in the new era, and to provide policy guidance for comprehensively improving the efficiency of reading promotion work. [Method/Process] There are a total of 10 national and industry standards that include relevant descriptions of reading promotion in the existing standards. In addition, regions such as Zhejiang and Anhui have formulated local reading promotion standards based on practical considerations. However, most of the existing standards predominantly approach reading promotion mainly from the perspective of reader services, and lack the perspective of managers. This article fills this gap by examining the role of the AIGC in the standardized management of reading promotion, extracting the essential elements of standardized management for reading promotion, and constructing a standardized management system that encompasses the entire process of reading promotion. [Results/Conclusions] The standardized management of reading promotion is a feasible and scalable system that includes three aspects: the strategic level, the implementation level, and the resource level. The tasks of the strategic level mainly include setting management goals, coordinating the establishment of various management documents, adjusting organizational structures, providing implementation guidance, and coordinating the sharing and use of various resources. The implementation level is the core link in achieving the management goals for reading promotion and systematically advancing the management work. This includes understanding, implementing, evaluating, and supervising the standardized management of reading promotion. The resource level, considered from an applied perspective, aims to provide comprehensive resource support for the implementation of reading promotion work and management, including organizational resources, literature resources, technological resources, digital resources, and financial resources needed for reading promotion work. The standardized management of reading promotion must incorporate the five basic elements of management subjects, objects, goals, methods, and culture, while fully considering the management changes brought about by the AIGC environment and new technologies. The future standardized management of reading promotion should emphasize strategic management, increase technological investment, emphasize skill enhancement, optimize process management, and strengthen support systems. [ABSTRACT FROM AUTHOR]

Airway stenting is an important clinical intervention applied in patients with airway disorders, but it may change the microbial composition of the airways. Before the placement of stents for benign and malignant airway stenosis, the predominant microbiota in the airway is Staphylococcus aureus, while after stent placement, the microbial spectrum change to gram-negative bacteria. Additionally, there is a close relationship between stent-related infection and granulation tissue growth with Staphylococcus aureus and Pseudomonas aeruginosa. [ABSTRACT FROM AUTHOR]

[Objective] The purpose of this paper is to measure the coupling coordination of urban land use and the economic-social-environmental system in the Yangtze River Economic Belt, and investigate its spatial and temporal differentiation characteristics and driving factors, and then to provide decision-making for promoting sustainable land use and high-quality coordinated development in the Yangtze River Economic Belt. [Methods] Based on the panel data of 108 prefecture-level cities in the Yangtze River Economic Belt from 2006 to 2019, this study constructed an indicator system of land use and economic-social-environment system, measured the coupled coordination degree using the entropy weight method and coupled coordination degree model, and examined its spatial and temporal divergence characteristics and driving factors with the methods of Dagum Gini coefficient, Moran index and geographically weighted regression model. [Results] The coupling coordination degree of land use and economic-social-environment in the Yangtze River Economic Belt increased from 0.309 to 0.477 during 2006—2019, transferring from mild disorder to barely coordinated. The coupling coordination degree decreased from downstream to upstream regions, showing a spatial distribution characteristics of the high level in the east and low level in the west. The overall, intra-regional, and inter-regional differences in coupling coordination showed a decreasing trend. The inter-regional variance was the main explanation for the overall variance, and its contribution increased from 43.67% to 46.88%. The Moran′s I of coupling coordination increased from 0.095 to 0.134, with significant positive spatial autocorrelation, and the ‘High-High’ agglomeration area mainly distributed in the lower reaches, while the ‘Low-Low’ agglomeration areas mainly distributed in the middle and upper reaches. Topographic relief and slope showed a negative driving force, urbanization level and foreign direct investment showed a positive driving force, and population density showed a two-level driving force. [Conclusion] The coupled coordination of land use and economic-social-environment in the Yangtze River Economic Belt has spatial and temporal heterogeneity, and differentiated land use policies should be formulated with full consideration of regional characteristics. [ABSTRACT FROM AUTHOR]

Copyright of Natural Gas & Oil is the property of Editorial Department of Natural Gas & Oil 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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