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Effect of initial microstructure on microstructure evolution and mechanical properties of 0.12C martensitic steels during quenching and tempering

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Journal of Iron and Steel Research International 2025年第1期32卷 260-269页

作者： Ya-ru Wang Zi-yong hou He Yang Jun Zhao Zhi-yuan Chang Fan-mao Meng Ling Zhang Gui-lin Wu xiao-xu Huang State Key Laboratory of Vanadium and Titanium Resource Comprehensive Utilization Panzhihua 617000SichuanChina State Key Laboratory of Advanced Special Steel Shanghai Key Laboratory of Advanced FerrometallurgySchool of Materials Science and EngineeringShanghai UniversityShanghai 200444China International Joint Laboratory for Light Alloys(Ministry of Education) College of Materials Science and EngineeringChongqing UniversityChongqing 400044China Institute of Steel Technology for Automobile and household Appliance Pangang Group Co.Ltd.Panzhihua 617000SichuanChina ATB Motor(Shanghai)Co. Ltd.Keen International CenterShanghai 200041China Beijing Advanced Innovation Center for Materials Genome Engineering University of Science and Technology BeijingBeijing 100083China

The microstructure evolution and mechanical properties of a Fe-0.12C-0.2Si-1.6Mn-0.3Cr-0.0025B(wt.%)steel with different initial microstructures,i.e.,hot rolled(HR)and cold rolled-annealed(CRA),were studied through optical microscopy,scanning electron microscopy,electron channeling contrast imaging,microhardness and room temperature uniaxial tensile *** water quenching from 930℃ to room temperature,a fully martensitic microstructure was obtained in both as-quenched HR and CRA specimens,which shows a microhardness of 480±5 HV,and no significant difference in microstructure and microhardness was *** test results show that the product of tensile strength and total elongation(UTS×TE)of the as-quenched HR specimen,i.e.,24.1 GPa%,is higher than that of the as-quenched CRA specimen,i.e.,18.9 GPa%.While,after being tempered at 300℃,the martensitic microstructures and mechanical properties of the two as-quenched specimens change significantly due to the synergy role of the matrix phase softening and the precipitation *** the maximum UTS×TE,it is 18.9 GPa%obtained in the as-quenched CRA one,while that is 24.4 GPa%obtained in the HR specimen after tempered at 300℃ for 5 min.

关键词： Initial microstructure Lath martensite Quenching Tempering Mechanical property

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Mass spectrometry imaging for unearthing and validating quality markers in traditional Chinese medicines

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Chinese Herbal Medicines 2025年第1期17卷 31-40页

作者： Zhiyun Wang Huajie Chang Qian Zhao Wenfeng Gou Yiliang Li Zhengwei Tu Wenbin hou Tianjin Key Laboratory of Radiation Medicine and Molecular Nuclear Medicine Institute of Radiation Medicine Peking Union Medical College & Chinese Academy of Medical Sciences Tianjin Nankai District Wangdingdi Hospital Tianjin Key Laboratory of Acute Abdomen Disease Associated Organ Injury and ITCWM Repair Tianjin Nan Kai Hospital

Quality marker(Q-Marker) is an innovative concept and model for quality control of Traditional Chinese medicines(TCMs),which will navigate the new direction of quality development of ***,how to characterize the overall quality attributes of TCMs and their biological effects is still *** view of this key scientific issue,this paper proposes a research method based on mass spectrometry imaging(MSI) technology for the discovery and confirmation of TCMs *** is powerful in investigating the spatial distribution of molecules in a variety of samples,and visualizing the information obtained from *** this basis,combine with the five principles of TCMs Q-Marker validation,i.e.,specificity,transmission and traceability,testability,prescription compatibility,and validity,were applied to confirm the finalized *** will lead the new direction of quality development of TCMs.

关键词： five principles quality marker quality control traditional Chinese medicines

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Telomeres: The Promise of New Cancer Therapies

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American Journal of Molecular Biology 2025年第1期15卷 88-96页

作者： Ruixian hou Jonathan J. Darrow Jericho High School Jericho NY USA Baylor College of Medicine Temple TX USA

Telomeres have been a subject of genetic research since the 1930s. They play a crucial role in cancer biology, as they influence both cellular senescence and genomic stability. In cancer cells, dysfunctional telomeres can lead to chromosomal fusions and, through deregulation of telomerase, allow replication of mutated chromosomes that might otherwise lead to apoptosis. Research is now focused on improving telomere-based cancer cell detection and developing potential therapies that inhibit telomerase activity in cancerous cells. Telomere research is crucial in understanding the molecular mechanisms influencing tumor growth and invasiveness because of the central role played by telomeres in various cancer types. Several telomerase inhibitors and immunotherapy treatments are in pre-clinical or clinical development. Research on the role of telomeres in oncogenesis has made significant strides, but obstacles remain, including a lack of high-resolution structural understanding, inadequate preclinical models, and concern over potential side effects. Even so, the current path of telomere research holds promise.

关键词： Telomere Telomerase Inhibition Cancer Detection Cancer Treatment Immunotherapy

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High-resolution Geochemistry in the Lucaogou Formation,Junggar Basin:An Assessment of Heterogeneous Shale Resources

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Acta Geologica Sinica(English Edition) 2025年第1期99卷 177-193页

作者： SUN Shijie ZHANG Bin WANG xiaomei TIAN Hua ZHANG Shuichang hou Guiting School of Earth and Space Sciences Peking UniversityBeijing 100871China Research Institute of Petroleum Exploration and Development PetroChinaBeijing 100083China

Controlled by fluctuating paleoclimates and sedimentary environments,the organic and inorganic features of the Lucaogou Formation exhibit strong heterogeneity in the vertical profile,challenging conventional geological *** elucidate the possible influence of heterogeneity on resource evaluation,a high-resolution sampling approach was applied to an 86.2 cm long core from the Lucaogou Formation of the Jimsar sag in the Junggar Basin.86 sets of samples were micro-drilled from the core and subjected to comparative Rock-Eval *** the classical guidelines,the organic abundance,kerogen type,and maturity of source rocks were exhaustively *** results revealed that organic richness and composition vary significantly under different sedimentary backgrounds,which in turn leads to differential hydrocarbon *** combination of hydrocarbon generation,transport,and expulsion results in peculiar patterns for hydrocarbon accumulation in the Lucaogou *** shales in the Lucaogou Formation serve as both hydrocarbon source rocks and reservoirs,with laminae being migration ***-rich dolomites in the Lucaogou Formation have a considerable hydrocarbon-generating capacity and present the characteristics of self-generation and ***,massive mudstones act purely as hydrocarbon source rocks.

关键词： unconventional resource heterogeneity Rock-Eval pyrolysis Lucaogou Formation Junggar Basin

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Regulating reversibility of Li-SOCl_(2)batteries by elucidating intrinsic charging conversion strategy

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Science Bulletin 2025年第2期70卷 140-143页

作者： Guodong Chen xin Liu Haoqi hou xiangyu Gao Lei Hu Shanmu Dong Guanglei Cui Qingdao Industrial Energy Storage Research Institute Qingdao Institute of Bioenergy and Bioprocess TechnologyChinese Academy of SciencesQingdao 266101China Shandong Energy Institute Qingdao 266101China Qingdao New Energy Shandong Laboratory Qingdao 266101China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China

Electric vehicles and portable devices have increased their demand for energy storage,resulting in the development of new high energy density batteries,including solid-state lithium-metal batteries,lithium-oxygen(Li-O_(2))batteries and lithium-sulfur(Li-S)batteries,which utilize high-capacity materials and will significantly break through the dilemma faced by the commercially available lithium-ion batteries[1–3].

关键词： lithium utilize batteries

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盐碱地增施氮肥对重金属污染盐地碱蓬铅富集量的影响

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草业科学 2025年第2期42卷 295-305页

作者：侯小兰李晓刚封晓辉河北农业大学林学院河北保定071000 中国科学院遗传与发育生物学研究所农业资源研究中心河北石家庄050022

盐生植物是盐碱地重金属污染生物修复的主要植物。为探究重度盐碱地增施氮肥对盐地碱蓬(Suaeda salsa)生长和铅(Pb)富集的影响,本研究采用盆栽试验,在3个土壤盐分水平下设置3种氮肥处理,分析了盐地碱蓬的生长、Pb富集和渗透调节特征。... 详细信息

盐生植物是盐碱地重金属污染生物修复的主要植物。为探究重度盐碱地增施氮肥对盐地碱蓬(Suaeda salsa)生长和铅(Pb)富集的影响,本研究采用盆栽试验,在3个土壤盐分水平下设置3种氮肥处理,分析了盐地碱蓬的生长、Pb富集和渗透调节特征。结果表明,施氮肥可显著增加盐地碱蓬地上部生物量,且底肥效果大于追肥(P<0.05)。施底肥时,高盐下盐地碱蓬地上部的Pb含量最高,为34.53 mg·kg^(−1),同时Pb富集量也最高,为350.77 mg;而追肥处理时,中、高盐条件下盐地碱蓬地上部干重和Pb富集量均高于不施肥处理;氮肥影响渗透调节物质,施底肥时以脯氨酸为主,而不施肥和追肥以可溶性糖为主,底肥显著增加了Ca^(2+)的积累。结果证明,以底肥的形式增施氮肥可以提高盐地碱蓬的生物量,增强盐生植物对盐碱地Pb污染的生物修复效果。

关键词：盐地碱蓬盐碱地氮肥土壤铅污染生物修复渗透调节植物离子

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Forced motions around triangular libration points by solar radiation pressure in a binary asteroid system

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Astrodynamics 2020年第1期4卷 17-30页

作者： xi-Yun hou xiao-Sheng xin Jing-Lang feng School of Astronomy and Space Science Nanjing University163 Xianlin Ave.Qixia DistrictNanjing210023China Institute of Space Environment and Astrodynamics Nanjing University5 Xanxiu CunGulou DistrictNanjing210093China Key Laboratory of Modern Astronomy and Astrophysics Ministry of EducuationNanjing210023China Beijing Institute of Tracking and Telecommunication Technology 26 Beiqing RoadHaidian DistrictBeijing100094China

By using two tri-axial ellipsoids to approximate the two asteroids,forced orbits around triangular libration points of the binary asteroid system(BAS)induced by solar radiation pressure are *** work is firstly carried out in the doubly synchronous binary asteroid system(DSBAS).The results show that the amplitude of the forced periodic orbit can be large,even for small to moderate surface area-to-mass ratios of the *** position,amplitude,and stability of these forced periodic orbits are influenced by the asteroids'non-spherical ***,the stability of them may be different,depending on the Sun's motion direction *** the BAS's orbit motion *** study is then generalized to the asynchronous and synchronous BAS(ABAS and SBAS,respectively).The forced orbits in the complete system are quasi-periodic orbits around the forced periodic orbit of the averaged system.

关键词： binary asteroid system(BAS) solar radiation pressure forced periodic orbit stability

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高速列车轴箱轴承低频波动载荷加载装置

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轴承 2025年第2期 46-52页

作者：侯宇郑勇辉孙鹏田王曦北京交通大学智慧高铁系统前沿科学中心北京100044 北京交通大学机械与电子控制工程学院北京100044

在高速列车运行过程中,复杂的轮轨关系等因素会使轴箱轴承承受宽频带的波动冲击载荷,导致滚子-滚道接触载荷大幅变化,加速轴承的磨损及疲劳失效。为在实验室环境中模拟轴箱轴承运用过程中承受的低频波动载荷,基于凸轮-弹簧机构设计、搭... 详细信息

在高速列车运行过程中,复杂的轮轨关系等因素会使轴箱轴承承受宽频带的波动冲击载荷,导致滚子-滚道接触载荷大幅变化,加速轴承的磨损及疲劳失效。为在实验室环境中模拟轴箱轴承运用过程中承受的低频波动载荷,基于凸轮-弹簧机构设计、搭建了一种低频波动载荷加载装置并开发了相应的轴箱轴承试验台架,加载装置施加的低频波动载荷以及在波动加载工况下轴箱轴承内部动态载荷分布情况的试验结果表明,所设计的波动载荷加载装置能够对轴箱轴承施加给定幅值、频率的波动载荷,轴承承载区域滚子-滚道接触载荷的波动情况与轴承总外加载荷的波动情况一致,验证了该波动载荷加载装置的有效性和可行性。

关键词：滚动轴承轴箱轴承高速列车变载荷加载试验台架

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The Acoustic Attenuation Prediction for Seafloor Sediment Based on in-situ Data and Machine Learning Methods

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Journal of Ocean University of China 2025年第1期24卷 95-102页

作者： WANG Jingqiang hou Zhengyu CHEN Yinglin LI Guanbao KAN Guangming xiAO Peng LI Zhenglin MO Dinghao HUANG Jingyi Key Laboratory of Marine Geology and Metallogeny First Institute of OceanographyMNRQingdao 266061China School of Ocean Engineering and Technology Sun Yat-Sen UniversityZhuhai 519000China Laboratory for Marine Geology Laoshan LaboratoryQingdao 266237China

Accurate acquisition and prediction of acoustic parameters of seabed sediments are crucial in marine sound propagation *** the relationship between sound velocity and physical properties of sediment has been extensively studied,there is still no consensus on the correlation between acoustic attenuation coefficient and sediment physical *** the acoustic attenuation coefficient remains a challenging issue in sedimentary acoustic *** this study,we propose a prediction method for the acoustic attenuation coefficient using machine learning algorithms,specifically the random forest(RF),support vector machine(SVR),and convolutional neural network(CNN)*** utilized the acoustic attenuation coefficient and sediment particle size data from 52 stations as training parameters,with the particle size parameters as the input feature matrix,and measured acoustic attenuation as the training label to validate the attenuation prediction *** results indicate that the error of the attenuation prediction model is *** the three models,the RF model exhibited the lowest prediction error,with a mean squared error of 0.8232,mean absolute error of 0.6613,and root mean squared error of ***,when we applied the models to predict the data collected at different times in the same region,we found that the models developed in this study also demonstrated a certain level of reliability in real prediction *** approach demonstrates that constructing a sediment acoustic characteristics model based on machine learning is feasible to a certain extent and offers a novel perspective for studying sediment acoustic properties.

关键词： in-situ measurement attenuation seafloor sediment machine learning methods

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Thermal and deformational repairing effect of crushed rock revetment acting as reinforcement along Qinghai–Tibet railway in permafrost regions

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Advances in Climate Change Research 2022年第3期13卷 421-431页

作者： Yan-Dong hou Qing-Bai WU Ming-Li ZHANG feng-xi Zhou School of Civil Engineering Lanzhou University of TechnologyLanzhou 730050China State Key Laboratory of Frozen Engineering Northwest Institute of Eco-Environment and ResourcesChinese Academy of ScienceLanzhou 730000China Beiluhe Observation Station of Frozen Soil Environment and Engineering Northwest Institute of Eco-Environment and ResourcesChinese Academy of ScienceLanzhou 730000China

Due to the particularity and complexity of permafrost subgrade,research on its long-term maintenance and reinforcement under climate warming and engineering activities is of great *** mitigate subgrade diseases caused by thermal disturbance during the engineering construction and operation in the initial stage,the crushed-rock revetment(CRR)was additionally paved with a thickness of 1.5 m and 1.0 m on some sunny and shady shoulders of the traditional embankments along the Qinghai-Tibet railway,*** improving effects for thermal and deforming stability are evaluated based on observation data of ground temperatures and embankment deformations at two sites from 2002 to *** results show that a larger uplifting magnitude in the artificial permafrost table(APT),greater ground temperature decreasing amplitudes and reduction ranges of settling rate appear under the shady embankment shoulder in warm permafrost region,and both sides in the cold permafrost region when reinforcing with ***,in warm permafrost region,the laying of CRR on the sunny slope of subgrade may cause considerable thermal disturbance to the underlying permafrost foundation,combined with the resulting additional stress,induce the further expansion of differential ***,the thermal stability strengthening effect of the CRR is closely related to the variation of the APT thickness in the earlier stage,convection intensity inside the CRR,‘cold energy reserve’in the deeper permafrost,and amount of solar radiation received by the *** effective reinforcements should be implemented to alleviate the potential threaten beneath sunny embankment slope in warm permafrost regions.

关键词： Ice-rich permafrost Crushed-rock revetment Differential settlement Thermal stability Artificial permafrost table

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