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CFRP约束钢管混凝土拱承载力试验研究

广州建筑 2024年第1期52卷 31-34页

作者：王沁茹付辉黄永辉广州大学风工程与工程振动研究中心广州510006

钢管混凝土结构较弱的耐腐蚀性导致结构的承载能力降低,进而引发了重大的安全担忧。近年来,CFRP作为一种轻质高强的复合材料,因其能够有效提升结构的承载能力及耐腐蚀性而备受关注。本文通过对1根钢管混凝土拱和3根CFRP约束的钢管混凝... 详细信息

钢管混凝土结构较弱的耐腐蚀性导致结构的承载能力降低,进而引发了重大的安全担忧。近年来,CFRP作为一种轻质高强的复合材料,因其能够有效提升结构的承载能力及耐腐蚀性而备受关注。本文通过对1根钢管混凝土拱和3根CFRP约束的钢管混凝土拱进行平面内五点加载试验,探究不同因素对结构构件承载能力的影响。通过有限元软件进行数值模拟以验证试验结果,确保模型的准确性和可靠性,为后续数值模拟和工程实践提供理论基础。

关键词：纤维增强聚合物压弯构件试验研究

Thymidylate synthase and thymidine phosphorylase gene expression as predictive parameters for the efficacy of 5-fluorouraci-based adjuvant chemotherapy for gastric cancer

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World Journal of Gastroenterology 2007年第37期13卷 5030-5034页

作者： Dong Hua Zhao-hui huang yong Mao Jian-Zhong Deng Oncology Institute of Wuxi the Fourth Affiliated Hospital ofSuzhou University Wuxi 214062 Jiangsu Province China

AIM： To investigate the prognostic role of thymidylate synthase （TS） and thymidine phosphorylase （TP） mRNA levels in T3 or T4 gastric cancer treated with 5-fluorouraci-based adjuvant chemotherapy. METHODS： Fifty-one patients with T3 or T4 gastric cancer received systemic 5-fluorouraci-based adjuvant chemotherapy, and intratumoral expression of TS and TP in 51 gastric cancer tissue samples was tested by realtime quantitative PCR.RESULTS： The median disease-free survival （DFS） time was 10.2 mo in the patients. There were no significant differences in DFS between the groups with high and low levels of TP. However, the group with low level of TS had a longer DFS （14.4 mo vs 8.3 mo, P = 0.017）. The median overall survival （OS） time was 18.5 mo, and there were significant differences in OS between the groups with high and low levels of TS or TP （for TS, 17.0 mo vs 21.3 mo, P = 0.010; for TP, 16.6 mo vs 22.5 too, P = 0.009）. Moreover, the coupled low expression of these two genes was strongly associated with a longer survival time of patients as compared with that of a single gene.CONCLUSION： Expression of TS and TP mRNA is a useful predictive parameter for the survival of postoperative gastric cancer patients after 5-fluorouracilbased adjuvant chemotherapy.

关键词： 5-fluorouracil Gastric cancer Thymidine phosphorylase Thymidylate synthase

瞬变电磁法在非煤地下矿山隐蔽致灾因素普查中的应用

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世界有色金属 2024年第13期 232-234页

作者：廖鑫黄惠勇杨百顺黄泽王东升四川省安全科学技术研究院四川成都610045 四川安信科创科技有限公司四川成都610045 重大危险源测控四川省重点实验室四川成都610045 四川省安科技术咨询有限公司四川成都610045

我国非煤地下矿山数量大、类型多、工艺复杂,部分矿山开采历史久远,基础资料缺乏,存在矿山隐蔽致灾因素辨识不清、各矿山隐蔽致灾因素普查成果水平参差不齐等问题。研究表明瞬变电磁法具有施工便捷、低阻敏感、探测距离较深等技术特点,... 详细信息

我国非煤地下矿山数量大、类型多、工艺复杂,部分矿山开采历史久远,基础资料缺乏,存在矿山隐蔽致灾因素辨识不清、各矿山隐蔽致灾因素普查成果水平参差不齐等问题。研究表明瞬变电磁法具有施工便捷、低阻敏感、探测距离较深等技术特点,可以查明地下矿山历史采空区位置、范围、边界和含水性等信息,科学高效支撑非煤地下矿山蔽致灾因素普查工作。

关键词：瞬变电磁法非煤地下矿山隐蔽致灾因素

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On generalized k-syzygy modules

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Science China Mathematics 2007年第5期50卷 675-682页

作者： Chong-hui huang & Zhao-yong huang Department of Mathematics, Nanjing University, Nanjing 210093, China College of Mathematics and Physics, Nanhua University, Hengyang 421001, China Department of Mathematics Nanjing University Nanjing China College of Mathematics and Physics Nanhua University Hengyang China

In this paper, we first introduce the notion of generalized k-syzygy modules, and then give an equivalent characterization that the class of generalized k-syzygy modules coincides with that ofω-k-torsionfree modules. We further study the extension closure of the category consisting of generalized k-syzygy modules. Some known results are obtained as corollaries.

关键词： generalized k-syzygy module ω-k-torsionfree module extension closure

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气相色谱-质谱法测定烘焙食品中4种香料

福建分析测试 2024年第2期33卷 21-27页

作者：陈集元黄永辉潘强胡朝阳许晖翁秋生林茂发福建省产品质量检验研究院福建福州350015

建立了同时检测烘焙食品中椰子醛、反式杨梅醛、顺式杨梅醛、桃醛四种香料的气相色谱-质谱方法。样品采用乙酸乙酯提取,经过低温速冻净化后,毛细管气相色谱柱(ZB-5,30 m×0.25 mm×0.25μm)分离,采用选择离子监测模式进行气相色谱质谱测... 详细信息

建立了同时检测烘焙食品中椰子醛、反式杨梅醛、顺式杨梅醛、桃醛四种香料的气相色谱-质谱方法。样品采用乙酸乙酯提取,经过低温速冻净化后,毛细管气相色谱柱(ZB-5,30 m×0.25 mm×0.25μm)分离,采用选择离子监测模式进行气相色谱质谱测定,外标法定量。方法学研究结果表明:目标化合物椰子醛、反式杨梅醛、顺式杨梅醛、桃醛在0.05~5.00μg/mL浓度范围内具有良好线性关系,相关系数为R^(2)≥0.999,方法定量限为0.01~0.04 mg/kg;回收率为81.3%~95.8%,相对标准偏差为2.43%~4.95%。该方法简单快捷,准确可靠,灵敏度高,可以用于烘焙食品中四种香料含量的测定。

关键词：烘焙食品椰子醛反式杨梅醛顺式杨梅醛桃醛气相色谱-质谱法

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通信信息能源技术在铁路行业应用研究

电信工程技术与标准化 2024年第7期37卷 81-86页

作者：陈昀昊王未邸涵宇张净彭思琦黄雍辉中国移动通信集团设计院有限公司北京100080

本文以国家双碳战略及产业融合思路为背景,结合铁路行业站点痛点及建设需求,分析多种问题模型,利用通信行业信息能源技术进行研究,提出适配于铁路行业的解决方案。以新型信息能源节能产品替代传统建设模式,并进行效益对比,促进产业技术... 详细信息

本文以国家双碳战略及产业融合思路为背景,结合铁路行业站点痛点及建设需求,分析多种问题模型,利用通信行业信息能源技术进行研究,提出适配于铁路行业的解决方案。以新型信息能源节能产品替代传统建设模式,并进行效益对比,促进产业技术升级,推动高新技术融合发展并应用到生产建设中。

关键词：节能技术铁路行业信息能源

Scientific and technological innovations of wastewater treatment in China

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Frontiers of Environmental Science & Engineering 2024年第6期18卷 43-48页

作者： hui huang Rui Ma Hongqiang Ren State Key Laboratory of Pollution Control and Resource Reuse School of the EnvironmentNanjing UniversityNanjing 210023China

The“dual-carbon”strategy promotes the development of the wastewater treatment sector and is an important tool for leading science and technology *** on the global climate change and the new policies introduced by China,this paper described the new needs for the development of wastewater treatment science and *** offered a retrospective analysis of the historical trajectory of scientific and technological advancements in this *** bibliometrics,it delineated the research hotspots within wastewater treatment,notably highlighting materials genomics,artificial intelligence,and synthetic ***,it posited that,in the future,the field of wastewater treatment should follow the paths of technological innovations with multi-dimensional needs,such as carbon reduction,pollution reduction,health,standardisation,and *** purpose of this paper was to provide references and suggestions for scientific and technological innovations in the field of wastewater treatment,and to contribute to the common endeavor of moving toward a Pollution-Free Planet.

关键词： Wastewater treatment Dual-carbon strategy Technological innovation Carbon reduction

Jetting of a near-wall cavitation bubble induced by another tandem bubble

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Journal of Hydrodynamics 2024年第3期36卷 444-456页

作者： hui Han Jing-zhu Wang Jian-lin huang Peng-bo Bai yong-gang Chen Yi-wei Wang Key Laboratory for Mechanics in Fluid Solid Coupling Systems Institute of MechanicsChinese Academy of SciencesBeijing100190China School of Engineering Science University of Chinese Academy of SciencesBeijing100049China Guangdong Aerospace Research Academy Guangzhou511458China School of Future Technology University of Chinese Academy of SciencesBeijing100049China Jianghuai Advance Technology Center Hefei230088China

Double bubbles near a rigid wall surface collapse to produce a significant jet impact,with potential applications in surface cleaning and ultrasonic ***,the dynamic behaviors of near-wall bubbles remain *** this study,we investigate the jetting of a near-wall bubble induced by another tandem *** define two dimensionless standoff distances,γ_(1),γ_(2),to represent the distances from the center of the near-wall bubble to the rigid wall and the center of controlling bubble to the center of the near-wall bubble,*** observations reveal three distinct jetting regimes for the near-wall bubble:transferred jetting,double jetting,and directed *** further investigate the jetting mechanism,numerical simulations are conducted using the compressibleInterFoam solver in the open-source framework of OpenFOAM.A detailed analysis shows that the transferred jet flow is caused by the pinch-off resulting from the axial contraction velocity at the lower end of the near-wall bubble being greater than the vertical contraction velocity,leading to a maximum jet velocity of 682.58 m/*** the case of double jetting,intense stretching between the controlling bubble and the wall leads to a pinch-off and a double jetting with a maximum velocity of 1096.29 m/*** directed jet flow is caused by the downward movement of the high-pressure region generated by the premature collapse of the controlling bubble,with the maximum jet velocity reaching 444.62 m/s.

关键词： Jetting of near-wall bubble controlling bubble impact velocity

Significantly Enhanced Energy Storage Performances of PEI-based Composites Utilizing Surface Functionalized ZrO_(2) Nanoparticles for High-Temperature Application

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Chinese Journal of Polymer Science 2024年第3期42卷 322-332,I0006页

作者： Qing-Qing Liu Qiu-Hao Lin Xiao-Dong Qi Nan Zhang Ting huang Jing-hui Yang yong Wang School of Chemistry Southwest Jiaotong UniversityChengdu 610031China Key Laboratory of Advanced Technologies of Materials Ministry of Education of ChinaSouthwest Jiaotong UniversityChengdu 610031China

Polymer dielectrics with a high energy density and an available energy storage capacity have been playing an important role in advanced electronics and power systems. Nevertheless, the use of polymer dielectrics in harsh environments is limited by their low energy density at high temperatures. Herein, zirconium dioxide(ZrO_(2)) nanoparticles were decorated with amino group utilizing 4,4-methylenebis(phenyl isocyanate)(AMEO) and successfully incorporated into polyetherimide(PEI) matrix. The dielectric properties, breakdown strength, and energy storage performances of PEI/ZrO_(2)-AMEO nanocomposites were investigated from 25 ℃ to 150 ℃. It is found that the combination of moderate bandgap ZrO_(2) with modest dielectric constant and polar groups at interface with deep trap can offer an available strategy to simultaneously increase the dielectric constant and breakdown strength of polymer dielectrics. As a result, the composites containing ZrO_(2)-AMEO exhibit excellent energy storage performance at elevated temperatures. Specially, the PEI-based composites with 3 vol% ZrO_(2)-AMEO display a maximum discharged energy density(U_(d)) of 3.1 J/cm^(3) at 150 ℃, presenting 90% higher than that of neat PEI. This study may help to better develop the polymer-based dielectric composite applied at elevated temperatures.

关键词： Polyetherimide High temperature dielectric ZrO_(2) Interface