Search

由钢筋混凝土(reinforced concrete)柱和钢(steel)梁组成的结构称为RCS结构,它融合了混凝土结构和钢结构的优良特性,使其在工程领域得到了广泛运用。近年来,研究者对RCS节点及其整体结构的抗震性能进行了深入研究,但鲜有文献考虑楼板对RCS结构的抗震性能的影响。基于此,对已完成的2榀1/3缩尺RCS框架抗震性能试验进行了数值模拟和参数分析,并结合弹性理论分析得出RCS结构抗震性能的改进意见,RCS有限元模型的有效性通过试验结果得到了验证。结果表明:纵筋配筋率、配箍特征值及轴压比对RCS结构的峰值承载力和延性影响显著;钢材强度(钢梁、纵筋和箍筋)对RCS结构力学性能的影响不明显;楼板的存在间接提高了钢梁腹板的高度,进而增大了钢梁的截面惯性矩和刚度,导致结构的承载力提高,但降低了框架的延性。

楼板平面内刚度对整体结构抗震性能有着重要影响,为研究带现浇混凝土楼板的框架-剪力墙组合结构体系的抗震性能,对一个3层2跨缩尺比例为1/4的框架-剪力墙组合结构进行了等效单自由度拟动力试验研究,观察该结构在地震作用下的动力反应,着重分析该框架-剪力墙组合结构在拟动力荷载情况下的破坏机制、耗能性能及变形恢复能力,从而掌握该框架-剪力墙组合结构的动力性能,为完善组合结构设计理论提供可靠的试验依据。结果表明,带现浇混凝土楼板的刚性可以保证结构的空间整体性和水平力的有效传递,该组合结构体系具有良好的抗震性能,满足抗震设防烈度为7度的抗震要求。

摘要：【目的】研究可能与LOC389023和二肽基肽酶10（DPP10）作用的microRNA 在难治性颞叶癫痫患者皮质中的 表达变化，预测LOC389023在颞叶癫痫中的分子海绵机制。【方法】15例脑外伤患者切除的皮质为正常组，26例难治性颞叶 癫痫患者行癫痫灶切除的皮质为癫痫组。运用western blot、免疫组织化学染色检测DPP10和电压依赖性钾通道4.3（Kv4.3） 的表达变化，采用免疫荧光染色对DPP10和kv4.3进行定位，采用免疫共沉淀分析DPP10与Kv4.3的相关性。运用miRanda、 Pita、TargetScan和miRDB软件分别预测与LOC389023以及DPP10相互作用的microRNA。采用qPCR技术检测LOC389023以 及microRNA 的表达变化。【结果】免疫组织化学染色和western blot 分析结果显示，DPP10 在癫痫组中高表达（P < 0.05）， Kv4.3 则低表达（P < 0.05）；DPP10 与Kv4.3 共表达于神经元的细胞膜且两者有相互作用；通过软件预测得到5 个候选 microRNA（miR-32-5p，miR-140-5p，miR-367-3p，miR-25-3p和miR-4325）；qPCR检测结果显示：在癫痫组中，LOC389023 和miR-140-5p表达水平均低于对照组（P＜0.05），miR-25-3p和miR-367-3p表达水平均高于对照组（P < 0.05），而miR-32-5p 和miR-4325无明显变化（P > 0.05）。【结论】LOC389023可能以分子海绵的机制调控miR-25-3p和miR-367-3p，继而调控 DPP10的表达参与癫痫的形成。

型钢混凝土指钢筋混凝土构件内含型钢的结构(SRC),在我国的应用和研究从上世纪八十年代开始。本文对目前的型钢混凝土设计理论、计算方法、试验研究的现状进行了整体的综述,简要介绍了设计理论中的容许应力计算法、一般极限状态计算法和概率极限状态设计法、正常使用极限状态计算中的变形、裂缝、刚度计算方法,以及和实验的对比结果,最后简要介绍了一个配螺旋箍SRC短梁试验。

Copyright of Asian Journals of Ecotoxicology 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 Railway Science & Engineering is the property of Journal of Railway Science & 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 Journal of Food Safety & Quality is the property of Journal of Food Safety & Quality 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 Journal of Food Safety & Quality is the property of Journal of Food Safety & Quality 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 Journal of Jinan University (Social Science Edition) is the property of Jinan 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 Food Research & Development is the property of Food Research & Development 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 Systems Engineering & Electronics is the property of Journal of Systems Engineering & Electronics 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 Food Research & Development is the property of Food Research & Development 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 New Building Materials / Xinxing Jianzhu Cailiao is the property of New Building Materials 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 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 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 Systems Engineering & Electronics is the property of Journal of Systems Engineering & Electronics 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.)

Based on Poisson model, this paper conducts an empirical study on the impact of Internet use on farmers’ green production technology adoption behavior. The results show that: Internet use has a significant role in promoting farmers’ green technology acceptance behavior; the more mu farmers operate and the higher their household income, the more likely they are to adopt green production technologies; compared with other areas, the plain is more conducive to the implementation of green production technology by farmers. This paper draws the following policy implications:strengthen the popularization of internet technology, promote the utilization rate of underdeveloped areas and improve production technology;formulate the promotion strategy of green agricultural production technology according to the income difference of different groups;the government should attach importance to the construction of rural informatization and increase the publicity of green production technology. [ABSTRACT FROM AUTHOR]

【Objective】The mutations in the VRTN gene g.20311_20312ins291 and g.19034A>C have been found to influence the number of thoracic vertebrae in lean meat pigs. These mutations can increase the number of thoracic vertebrae. This study aims to investigate the frequency of VRTN gene mutations in the Liang Guang Small Spotted pig populations and their impact on carcass and meat quality traits, providing reference for molecular breeding of Liang Guang Small Spotted pigs.【Method】Genomic DNA of 69 Liang Guang Small Spotted pigs was extracted and subjected to PCR amplification. Gel electrophoresis and TA cloning were used to detect the mutations at the g.20311_20312ins291 and g.19034A>C loci of the VRTN gene. Carcass and meat quality traits of the population were recorded, and the animals were grouped based on their mutation status. Statistical analysis was performed using t-tests.【Result】Among the population, 5 individuals were identified as carrying heterozygous mutations at both loci, indicating that the two mutations may be closely linked, with a frequency of 3.62% for both mutations. Statistical analysis indicated that the VRTN linked mutation allele did not significantly affect the number of ribs in Liang Guang Small Spotted pigs. However, they did affect carcass and meat quality traits. In terms of carcass traits, the VRTN gene heterozygous mutations significantly increased body length by 4.6% (P < 0.05) and body weight by 9.6% (P < 0.01), increased body slant length by 3.5%, but the difference was not significant. The backfat thickness and skin thickness were increased by 6.5% and decreased by 3.7%, respectively, but without significant differences. In terms of meat quality traits, the brightness L, chromaticity index a and b values of the heterozygous mutants increased by 0.01%, 14.7%, and 8.4%, respectively. The water loss rate significantly increased by 51.2% (P < 0.05). The difference in changes of shear force and pH value are not significant.【Conclusion】The VRTN gene mutations g.20311_20312ins291 and g.19034A > C are detected in the Liang Guang Small Spotted pig populations, but their frequencies are relatively low. These two mutations may be tightly linked. The VRTN gene heterozygous mutations will not increase the number of thoracic vertebrae in Liang Guang Small Spotted pigs, but they improve carcass traits to some extent while also have adverse effects on meat quality traits. Future breeding of Liang Guang Small Spotted pigs needs to balance the impact of VRTN gene mutations on carcass traits and meat quality traits. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Food Safety & Quality is the property of Journal of Food Safety & Quality 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 Journal of Railway Science & Engineering is the property of Journal of Railway Science & 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 Advances in New & Renewable Energy is the property of Editorial Office of Advances in New & Renewable Energy 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 Railway Science & Engineering is the property of Journal of Railway Science & 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 Advances in New & Renewable Energy is the property of Editorial Office of Advances in New & Renewable Energy 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 Food Safety & Quality is the property of Journal of Food Safety & Quality 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.)

General Secretary Xi Jin-ping’s series of important remarks on national defense have always put people’s security and national security first, vigorously implemented the strategy of strengthening the country, strengthening the military and militarycivilian integration, and actively advocated the building of a community with a shared future for mankind. Always adhere to the people-centered development thought, comprehensively improve the people’s “security” “sense”, “formed the” national defense education is an important way of quality of the national”, “our national defense is national defense”“, civilian integration is a national strategy”“, is the comprehensive modernization of national defense and military basic project”“, is the Chinese dream strong power strategy, long-term policy” and other important thoughts, reflects the people’s yearning for a better and harmonious life, for the new era to ensure the national lasting peace and people’s stability and happiness provides a path guide. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Food Safety & Quality is the property of Journal of Food Safety & Quality 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.)

In order to study the effect of alginate lyase (AlgL) on biofilm and bacterial factors RpoS gene of hypervirulent Klebsilla pneumoniae (HvKP), 30 strains of Klebsiella pneumoniae (KP) were isolated from clinical samples. They were identified by automatic rapid microbial mass spectrometry detection system VITEK, were done susceptibility tests for drug resistance analysis, the strains with positive wire drawing test were identified as HvKP. The bacterial biofilm was detected by semi quantitative crystal violet staining. The expression of RpoS gene was detected by polymerase chain reaction (PCR). AlgL can significantly inhibit HvKP biofilm, and the thickness of biofilm is positively correlated with the expression of RpoS gene, indicating that alginate lyase can inhibit the formation of HvKP biofilm. It provides a research basis for AlgL in the clinical treatment of HvKP. [ABSTRACT FROM AUTHOR]

Copyright of New Building Materials / Xinxing Jianzhu Cailiao is the property of New Building Materials 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 Transportation Science & Technolgy is the property of Transportation Science & 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 Engineering Mechanics / Gongcheng Lixue is the property of Engineering Mechanics 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 Oil Drilling & Production Technology / Shiyou Zuancai Gongyi is the property of Shiyou Zuancai Gongyi Bianjibu 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 Harbour Engineering is the property of Editorial Office of China Harbour 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 Food Safety & Quality is the property of Journal of Food Safety & Quality 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 Journal of Guilin University of Technology is the property of Journal of Guilin University of 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 Oil Drilling & Production Technology / Shiyou Zuancai Gongyi is the property of Shiyou Zuancai Gongyi Bianjibu 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.)

Cadmium manganese telluride (CdMnTe) is an excellent room temperature nuclear radiation detector material, which can be used in environmental monitoring and industrial non-destructive testing. A room temperature planar detector with a size of 10 mm ×10 mm ×2 mm was fabricated using In doped Cd0.9Mn0.1Te crystal grown by Te solvent Bridgman method. The spectroscopy responses of CdMnTe detectors were investigated by irradiation of γ-ray from 241Am@ 59. 5 keV source. By characterizing parameters of infrared transmittance, resistivity and energy spectrum response, the quality, electricity and detector performance of CdMnTe crystal were comprehensively evaluated. The results show that the infrared transmittance of the wafer are above 55%, up to 60%. The leakage current under 100 V bias voltage reduces from 9. 48 nA to 7. 90 nA after wet passivation. The resistivity after wet passivation is 2. 832 ×1010 Ω·cm. Under the reverse bias of -400 V, the energy resolution of CdMnTe detector for 241Am@ 59. 5 keV γ-ray source before and after passivation is 13. 53% and 12. 51%, respectively, and the electron mobility lifetime product after passivation is 1. 049 × 10-3 cm²/V. The variation of energy resolution with voltage was studied. When the bias voltage is no more than 400 V, the energy resolution of the detector is mainly determined by the carrier collection efficiency. While when the bias voltage is more than 400 V, the energy resolution is affected by the leakage current of the detector. The research results show that the CdMnTe crystal grown by the Te solvent Bridgman method has good crystal quality, and the resistivity and electron mobility lifetime product can meet the requirements of detector preparation. [ABSTRACT FROM AUTHOR]

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 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 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 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.)