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高品质再生粗骨料混凝土配合比优化

工程建设与设计 2025年第2期 171-173页

作者：乔建新中铁建工集团第四建设有限公司上海230000

对高品质再生粗骨料混凝土(RCAC)的配合比优化进行深入研究,通过调整配合比设计,提高RCAC的力学性能和耐久性,以满足现代建筑对环保材料的高性能要求。研究过程中,采用实验室试验与数据分析相结合的方法,探讨了水灰比、骨料替代率、掺... 详细信息

对高品质再生粗骨料混凝土(RCAC)的配合比优化进行深入研究,通过调整配合比设计,提高RCAC的力学性能和耐久性,以满足现代建筑对环保材料的高性能要求。研究过程中,采用实验室试验与数据分析相结合的方法,探讨了水灰比、骨料替代率、掺和料种类和掺量等关键参数对RCAC性能的影响。通过多组配合比试验,确定了RCAC的最优配合比。结果表明:优化后的RCAC在强度、抗裂性和耐久性等方面均表现出色,具有较高的综合性能。

关键词：高品质再生粗骨料混凝土配合比优化力学性能耐久性

Microstructure evolution of Ti_(48)Zr_(27)Cu_(6)Nb_(5)Be_(14)amorphous alloy after semi-solid isothermal treatment

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China Foundry 2024年第3期21卷 287-294页

作者： xin-hua Huang Jing-wen pu Yong-xin Luo Yue-jun Ouyang School of Material Electricity and Intelligent ManufacturingHuaihua UniversityHuaihua 330031HunanChina Hunan Renewable Aluminum Innovation Research Center Huaihua UniversityHuaihua 330031HunanChina

The as-cast amorphous Ti_(48)Zr_(27)Cu_(6)Nb_(5)Be_(14)composites,comprising in situ formedβ-Ti ductile crystalline precipitates,were prepared by water cooled copper mold suction ***,the semi-solid composites were obtained after the as-cast composites were treated by semi-solid isothermal *** microstructure evolution and kinetics of the composites were *** show that the microstructures of both the as-cast and semi-solid composites comprise ofβ-Ti crystal phases and amorphous matrix *** and after treatment,the crystals evolve from fine granular or fine dendritic crystals to coarse *** the treatment temperature increasing or the time prolonging,the average crystal size gradually increases and the surface morphology of the crystals gradually becomes *** studying the microstructural evolution and dynamics during the isothermal treatment process,it is found that the final morphology ofβ-Ti crystals is influenced by the isothermal treatment temperature and time(t),and theβ-Ti evolution rate increases with an increase in treatment *** addition,a linear relationship was observed between the size of cubicβ-Ti crystals(D^(3))and t;the growth kinetics factor K is 3.8μm^(3)·s^(-1).As the K value closes to 4μm^(3)·s^(-1),it is inferred the morphology evolution ofβ-Ti crystals is a coarsening behavior controlled by the diffusion of solute elements.

关键词： Ti_(48)Zr_(27)Cu_(6)Nb_(5)Be_(14) amorphous matrix composites semi-solid as-cast microstructure

Six new cytotoxic and anti-inflammatory 11,20-epoxy-ent-kaurane diterpenoids from Isodon wikstroemioides

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Chinese Journal of Natural Medicines 2015年第5期13卷 383-389页

作者： WU Hai-Yan WANG Wei-Guang DU Xue YANG Jin pu jian-xin SUN Han-Dong State Key Laboratory of Phytochemistry and Plant Resources in West China Kunming Institute of BotanyChinese Academy of Sciences University of Chinese Academy of Sciences

The present study was designed to determine the chemical constituents of Et OAc extracts of the aerial parts of Isodon *** 1–8 were isolated and purified by normal-phase silica gel and reversed-phase C18 silica gel column chromatography and *** structures were elucidated by extensive spectroscopic *** of them were evaluated for their in vitro cytotoxicity against human cancer HL-60,SMMC-7721,A-549,MCF-7,and SW-480 cells and their inhibitory activity against nitric oxide(NO) production in LPS-activated RAW264.7 *** the eight 11,20-epoxy-ent-kauranoids isolated,compounds 1–6(isowikstroemins H–M) were new *** 1,3,and 7 exhibited significant cytotoxicity with IC50 values ranging from(0.84 ± 0.02) to(4.09 ± 0.34) μmol·L-1,while compounds 4 and 5 showed selective *** addition,compounds 1,3,4,and 7 exhibited inhibitory activity against nitric oxide(NO) production in LPS-activated RAW264.7 *** results provide a basis for future development of these compounds as anti-cancer and anti-inflammatory agents.

关键词： Isodon wikstroemioides Isowikstroemins H–M Cytotoxicity Anti-inflammatory activity

Structural dynamic responses analysis applying differential quadrature method

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2006年第11期7卷 1831-1838页

作者： pu Jun-ping ZHENG jian-jun College of Architecture and Civil Engineering Zhejiang University of Technology Hangzhou 310032 China

Unconditionally stable higher-order accurate time step integration algorithms based on the differential quadrature method (DQM) for second-order initial value problems were applied and the quadrature rules of DQM, computing of the weighting coefficients and choices of sampling grid points were discussed. Some numerical examples dealing with the heat transfer problem, the second-order differential equation of imposed vibration of linear single-degree-of-freedom systems and double-degree-of-freedom systems, the nonlinear move differential equation and a beam forced by a changing load were computed, respectively. The results indicated that the algorithm can produce highly accurate solutions with minimal time consumption, and that the system total energy can remain conservative in the numerical computation.

关键词： Differential quadrature method (DQM) Dynamic response analysis Conservation of energy

New measurement of ^(63)Cu(γ,n)^(62)Cu cross-section using quasi-monoenergeticγ-ray beam

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Nuclear Science and Techniques 2025年第2期36卷 131-140页

作者： Zhi-Cai Li Zi-Rui Hao Qian-Kun Sun Yu-Long Shen Long-Xiang Liu Hang-Hua Xu Yue Zhang pu Jiao Meng-Die Zhou Yu-Xuan Yang Sheng Jin Kai-Jie Chen Zhen-Wei Wang Shan Ye xin-Xiang Li Chun-Wang Ma Hong-Wei Wang Gong-Tao Fan Wen Luo School of Nuclear Science and Technology University of South ChinaHengyang 421001China Shanghai Advanced Research Institute Chinese Academy of SciencesShanghai 201210China Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201800China University of Chinese Academy of Science Beijing 100049China School of Physics Henan Normal UniversityXinxiang 453007China China Institute of Atomic Energy Beijing 102413China Institute of Nuclear Science and Technology Henan Academy of SciencesZhengzhou 450046China

We present new data on the^(63)Cu(γ,n)cross-section studied using a quasi-monochromatic and energy-tunableγbeam produced at the Shanghai Laser Electron Gamma Source to resolve the long-standing discrepancy between existing measurements and evaluations of this *** an unfolding iteration method,^(63)Cu(γ,n)data were obtained with an uncertainty of less than 4%,and the inconsistencies between the available experimental data were ***γ-ray strength function of^(63)Cu(γ,n)was successfully extracted as an experimental *** further calculated the cross-section of the radiative neutron capture reaction^(62)Cu(n,γ)using the TALYS *** calculation method enables the extraction of(n,γ)cross-sections for unstable nuclides.

关键词： ^(63)Cu(γ n)reaction Cross-section data Quasi-monochromaticbeam Radiative neutron capture reaction

Versatile chiroptical induction/manipulation through specific solvation of ion pairs by alcohols

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Science China Chemistry 2025年第2期 610-621页

作者： Chunhong Liu xin Chen Yanling Shen Ting Zhao Dayang Zhou Kun Li Jiecheng Ji Wanhua Wu Xuemei pu Cheng Yang Key Laboratory of Green Chemistry & Technology of Ministry of Education Sichuan University Comprehensive Analysis Center ISIROsaka University

While extensive research has explored manipulating supramolecular chirality through internal and external factors, the specific solvation effect remains uncharted territory. This study synthesized ortho-functionalized pillar[5]arene（P[5]） derivatives Mn and Dn via thiol-Michael addition, characterizing them through spectroscopic and X-ray single-crystal analyses. Mn and Dn interacted with chiral amines, yielding significant circular dichroism（CD） responses. Intriguingly, the chiral induction exhibited pronounced specific solvation effects, where achiral alcohols either enhanced, attenuated, or reversed CD signals. Testing over 40 alcohols revealed correlations between the specific solvation effects and alcohol polarity and acidity. Molecular dynamics simulations unveiled that the alcohol interacted distinctly through hydrogen bonding, with one ion pair bonding up to four alcohol molecules. The Rp- and Sp-preference of the P[5] core could be altered by the number of bonded alcohols. This work uncovers the critical role of alcohol-specific solvation in ion pair-involved chiral assembly, pertinent for asymmetric ion-pairing catalysis and the use of alcohol additives in organic solvents.

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Density Functional Studies on Isonicotinato Lead(II) Complex [Pb(C_5H_4NCOO)_2]

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Chinese Journal of Structural Chemistry 2006年第6期25卷 657-662页

作者： ZHAO pu-Su jian Fang-Fang LI Chun-Lei ZHENG jian Department of Chemistry Huaiyin Teachers＇College Huaian Jiangsu 223001 China New Materials ＆ Function Coordination Chemistry Laboratory Qingdao University of Science and Technology Qingdao Shandong 266042 China

The title compound of isonicotinato lead（Ⅱ） [Pb（C5H4NCOO）2] has been optimized at B3LYP/LANL2DZ level of theory and calculated results show that the lead（Ⅱ） ion adopts 4-coordinate geometry. Atomic charge distributions indicate that during forming the title compound, each isonicotinic acid ion transfers -0.452 e to lead（Ⅱ） ion. The electronic spectra calculations show that there exist two absorption bands and the electronic transitions are mainly derived from the contribution of intraligand π→π^＊ transition and ligand-to-metal charge transfer （LMCT） transition. The thermodynamic properties of the title compound at different temperatures have been calculated and corresponding relations between property and temperature have also been obtained. The calculation of the second order optical nonlinearity was carried out, and the molecular hyperpolarizability was 3.62365^＊10^-30 esu.

关键词： isonicotinato lead(Ⅱ) complex density functional theory electronic spectra thermal property analysis the second order optical nonlinearity

3D geological suitability evaluation for underground space based on the AHP-cloud model

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Underground Space 2023年第1期8卷 109-122页

作者： Fei Deng jian pu Yu Huang Qingding Han Department of Geotechnical Engineering College of Civil EngineeringTongji UniversityShanghai 200092China Key Laboratory of Geotechnical and Underground Engineering of the Ministry of Education Tongji UniversityShanghai 200092China Foshan Geological Bureau of Guangdong Province FoshanGuangdong 528000China

Urban development continues to reduce the amount of available ground *** development of underground space is thus gath-ering increasing attention to alleviate ground ***,there is currently a lack of a three-dimensional(3D)evaluation method to systematically evaluate the geological conditions of underground space and possible geological disaster risks caused by rock and soil *** paper presents an engineering geological suitability assessment framework based on 3D geological modeling and an analytic hierarchy process(AHP)-cloud *** the basis for 3D evaluation,a 3D structural model of the study area is established based on the drilling data and geological *** the structural model is partitioned to obtain interpolation grids,and the ordinary Kriging interpolation method is applied to attribute *** the attributes are exported from the geological model,and the rock and soil masses are divided into four categories according to their engineering properties,namely soft soil,sandy soil,cohesive soil,and rock,upon which a targeted hierarchy structure is established based on the attributes that impact the *** paper intro-duces the cloud model to characterize the uncertainty of these evaluation indexes,which synthesizes an AHP method,thus it is referred to as the AHP-cloud *** new model is used to evaluate the geological suitability of underground space in the Sanlong Bay district,Foshan City,Guangdong,*** addition,we also determine the excavation difficulty at different depths according to the lithology and weathering degree of the study *** limitations and future directions of the proposed method are discussed,including the influ-encing factors and weight determination.

关键词： 3D suitability evaluation Underground space Targeted AHP hierarchical structure Cloud model Difficulty of excavation

循环生物标记物在甲胎蛋白阴性肝细胞癌早期诊断中的研究进展

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中国普通外科杂志 2025年第1期34卷 150-159页

作者：刘昂苏鑫李鉴徐晓赵常春郝相勇甘肃中医药大学第一临床医学院(甘肃省人民医院) 甘肃兰州730000 甘肃省人民医院普通外科甘肃兰州730000

肝细胞癌(HCC)是最常见的肝癌类型,也是全球癌症相关死亡的主要原因之一。虽然早期诊断可以显著改善预后,但甲胎蛋白阴性肝细胞癌(ANHCC)因缺乏可靠的生物标记物而面临诊断难题。本综述系统探讨了多种循环生物标记物在ANHCC早期诊断中... 详细信息

肝细胞癌(HCC)是最常见的肝癌类型,也是全球癌症相关死亡的主要原因之一。虽然早期诊断可以显著改善预后,但甲胎蛋白阴性肝细胞癌(ANHCC)因缺乏可靠的生物标记物而面临诊断难题。本综述系统探讨了多种循环生物标记物在ANHCC早期诊断中的潜力,包括AFP-L3、维生素K缺乏或拮抗剂Ⅱ诱导蛋白(PIVKA-Ⅱ)、淋巴细胞与单核细胞比值、外泌体、循环游离核糖核苷酸(cfDNA)、循环肿瘤细胞、骨桥蛋白、对氧磷酶1、自身抗体及RNA相关标记物。研究表明,这些标记物的联合应用,特别是AFP-L3与PIVKA-Ⅱ的结合,显著提高了诊断的准确率和特异度。此外,外泌体、cfDNA及RNA标记物凭借其无创性和高稳定性,在诊断中表现出较大潜力。尽管已有诸多进展,仍需开展大规模、多中心研究以验证相关发现,解决检测方法标准化等挑战,并进一步阐明潜在机制。这些研究进展有望为ANHCC的早期发现和个性化治疗提供重要支持。

关键词：癌,肝细胞甲胎蛋白类生物标记,肿瘤综述