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Evaluation of pedotransfer functions for predicting particle density of soils with low organic matter contents

GEODERMA 2022年 416卷

作者： Qin, Lu lin, Lirong Ding, shuwen Yi, Ceng Chen, Jiazhou Tian, Zhengchao Huazhong Agr Univ Coll Resources & Environm Wuhan 430070 Peoples R China Minist Agr & Rural Affairs Key Lab Arable Land Conservat Middle & Lower Reac Wuhan 430070 Peoples R China

Soil particle density (ps) is a basic soil physical property which is essential for soil pore volume estimation and sediment source discrimination. The measurement of soil ps is labor intensive and time-consuming. Pedotransfer functions (PTFs) have been developed for estimating ps from readily available soil properties during the past decades. Existing PTFs are developed mainly based on soil datasets covering wide ranges of soil organic matter (SOM) contents. For soils from subtropical regions with low SOM values the accuracy of previous PTFs remains unknown. In this study we evaluated the performance of existing ps PTFs by comparing model estimates to measurements of 175 soils from a subtropical region in China. The investigated soils had relatively low SOM contents (mostly<0.02 g g-1) and covered texture ranges from coarse sand to clayey soils. The Adams-based PTFs performed poorly, while the modified Adams PTFs and several simple linear or multiple regression PTFs produced relatively accurate ps estimates for the 175 soils with root mean square errors (RMSEs) around 0.05 g cm-3 and mean biases within +/- 0.03 g cm-3. Further multiple regressions indicated that the ps of subtropical soils was simply a negative linear function of clay content. Despite conflicting several early reports, an independent dataset showed that the proposed linear model provided accurate ps estimates for soils with low SOM contents from subtropical regions with a RMSE of 0.030 g cm-3 and mean bias of -0.013 g cm-3.

关键词： Soil particle density Pedotransfer functions Organic matter content Soil texture

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Datasets for the CMIP6 Scenario Model Intercomparison Project (ScenarioMIP) Simulations with the Coupled Model CAS FGOALS-f3-L

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Advances in Atmospheric Sciences 2021年第2期38卷 329-339页

作者： shuwen ZHAO Yongqiang YU Pengfei lin Hailong LIU Bian HE Qing BAO Yuyang GUO Lijuan HUA Kangjun CHEN Xiaowei WANG State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics(LASG) Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China University of Chinese Academy of Sciences Beijing 100049China Center for ocean Mega-Science Chinese Academy of SciencesQingdao 266071China Chinese Academy of Meteorological Sciences Beijing 100081China Yunnan University Kunming 650091China

The datasets for the tier-1 Scenario Model Intercomparison Project(ScenarioMIP)experiments from the Chinese Academy of Sciences(CAS)Flexible Global Ocean-Atmosphere-Land System model,finite-volume version 3(CAS FGOALS-f3-L)are described in this *** is one of the core MIP experiments in phase 6 of the Coupled Model Intercomparison Project(CMIP6).Considering future CO2,CH4,N2O and other gases’concentrations,as well as land use,the design of ScenarioMIP involves eight pathways,including two tiers(tier-1 and tier-2)of ***-1 includes four combined Shared Socioeconomic Pathways(SSPs)with radiative forcing,i.e.,SSP1-2.6,SSP2-4.5,SSP3-7.0 and SSP5-8.5,in which the globally averaged radiative forcing at the top of the atmosphere around the year 2100 is approximately 2.6,4.5,7.0 and 8.5 W m−2,*** study provides an introduction to the ScenarioMIP datasets of this model,such as their storage location,sizes,variables,*** analysis indicates that surface air temperatures will increase by about 1.89℃,3.07℃,4.06℃ and 5.17℃ by around 2100 under these four scenarios,***,some other key climate variables,such as sea-ice extension,precipitation,heat content,and sea level rise,also show significant long-term trends associated with the radiative forcing *** datasets will help us understand how the climate will change under different anthropogenic and radiative forcings.

关键词： CMIP6 ScenarioMIP FGOALS-f3-L coupled model data description

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双激振模式下的压实系统整体动力学分析与试验

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振动与冲击 2017年第11期36卷 232-241页

作者：沈培辉林述温福建船政交通职业学院福州350007 福州大学机械工程及自动化学院福州350002

双钢轮振动压路机在双激振模式下,存在特有的振动特性,综合考虑不同压实阶段土壤物料的非对称滞回特性和前后轮可能跳振脱耦的实际工况,提出7自由度整体动力学模型,一次近似下,采用谐波线性化和Krylov Bogolyubov Mitropolsky(KBM)相结... 详细信息

双钢轮振动压路机在双激振模式下,存在特有的振动特性,综合考虑不同压实阶段土壤物料的非对称滞回特性和前后轮可能跳振脱耦的实际工况,提出7自由度整体动力学模型,一次近似下,采用谐波线性化和Krylov Bogolyubov Mitropolsky(KBM)相结合的方法获得不同压实阶段的等效刚度和阻尼,并系统研究驾驶室由于前后轮振动频率差引起的拍振运动特性,在不同的压实工况模型参数下,庞加莱运动截面体现出单周期,双周期分叉,三周期直至多周期的非线性运动特性;压实中后期,系统产生高次超谐波共振和亚谐波共振,在大的激振力和低频作业下,驾驶室拍振运动进入混沌振动,通过合理调整激振力和双激振频率,可以有效地抑制混沌,从而延长压路机零部件的使用寿命和提高操作舒适性,现场的施工压实试验验证了提出模型和理论分析的合理性。

关键词：压实系统动力学模型拍振脱耦混沌

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Initial Upper Paleolithic in North China: New data from Shuidonggou locality 9

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ARCHAEOLOGICAL RESEARCH IN ASIA 2023年 36卷

作者： Peng, Fei Chen, Guo Pei, shuwen lin, Sam Gao, Xing Minzu Univ China Dept Archaeol & Museol Beijing 100081 Peoples R China Chinese Acad Sci Inst Vertebrate Paleontol & Paleoanthropol Key Lab Vertebrate Evolut & Human Origins Beijing 100044 Peoples R China Chinese Acad Sci Ctr Excellence Life & Paleoenvironm Beijing 100044 Peoples R China Univ Wollongong Ctr Archaeol Sci Sch Earth Atmospher & Life Sci Wollongong NSW 2522 Australia Univ Wollongong Australian Res Council Ctr Excellence Australian Biodivers & Heritage Wollongong NSW 2522 Australia Univ Chinese Acad Sci Beijing 100044 Peoples R China

The timing and dispersal of modern humans into Northeast Asia has been a subject of hot debate, fueled by increasing discoveries of previously unknown human species in the region, including the so-called Denisovans. In this debate, archaeological assemblages identified as Initial Upper Paleolithic (IUP) play a key role as they are often seen as possible markers for the dispersal of modern human culture across Eurasia. In North China, the presence of IUP blade assemblages is well-established at the Shuidonggou site complex (SDG), particularly at SDG locality 1 (SDG1). In this study, we present a preliminary analysis of another blade-dominated lithic assemblage from SDG locality 9 (SDG9). Applying a combination of typological and technological approaches, we demonstrate that, similar to SDG1, the lithic reduction patterns represented at SDG9 are centered on the use of the recurrent Levallois method to produce blades and elongated flakes, a technological feature that is characteristic of the IUP technology. However, the SDG9 assemblage also exhibits some differences to SDG1, including the dominant use of siliceous limestone as raw material, the absence of prismatic and sub-prismatic cores, and limited retouched pieces. These disparities indicate possible regional variation and diversities in IUP assemblages at SDG.

关键词： Shuidonggou locality 9 Blade Initial Upper Paleolithic Northwest China

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基于BP神经网络的挖掘机动臂应力预测

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现代制造工程 2018年第1期 59-62,103页

作者：闫二乐林航林述温杨拴强福州大学机械工程及其自动化学院福州350108 福建中海创自动化科技有限公司福州350108 福建江夏学院工程学院福州350108

针对挖掘机动臂结构优化过程中需要反复调用ANSYS有限元软件,导致应力强度控制难度大、优化过程繁琐且效率低下的问题,提出一种基于BP神经网络预测动臂应力的方法。通过在挖掘机动臂结构优化设计软件中设定截面选取规则,选取应力普查的... 详细信息

针对挖掘机动臂结构优化过程中需要反复调用ANSYS有限元软件,导致应力强度控制难度大、优化过程繁琐且效率低下的问题,提出一种基于BP神经网络预测动臂应力的方法。通过在挖掘机动臂结构优化设计软件中设定截面选取规则,选取应力普查的截面导出截面应力样本,并在MATLAB中运用BP神经网络建立挖掘机动臂应力预测模型。以中小型挖掘机动臂为例,建立基于动臂应力普查的约束,获取应力预测样本,运用建立的神经网络预测模型对动臂应力进行预测。结果表明,网络预测应力值与实验数据吻合且误差小于6.80%,建立的预测模型能提高动臂结构的优化效率。

关键词：挖掘机动臂应力普查应力特征截面 BP神经网络应力预测

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Mild Hyperthermia Induced by Hollow Mesoporous Prussian Blue Nanoparticles in Alliance with a Low Concentration of Hydrogen Peroxide Shows Powerful Antibacterial Effect

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MOLECULAR PHARMACEUTICS 2022年第3期19卷 819-830页

作者： Li, Yuting Zhu, Yun Wang, Cheng Shen, Yue Liu, Li Zhou, shuwen Cui, Peng-Fei Hu, Huaanzi Jiang, Pengju Ni, Xinye Qiu, lin Wang, Jianhao Changzhou Univ Sch Pharm Changzhou 213164 Jiangsu Peoples R China Nanjing Univ Dept Pharm Nanjing Drum Tower Hosp Affiliated HospMed Sch Nanjing 210008 Jiangsu Peoples R China Nanjing Med Univ Affiliated Changzhou Peoples Hosp 2 Changzhou 213004 Jiangsu Peoples R China

The emergence of superbacteria as well as the drug resistance of the current bacteria gives rise to worry regarding a bacterial pandemic and also calls for the development of novel ways to combat the bacteria. Here in this article, we demonstrate that mild hyperthermia induced by hollow mesoporous Prussian blue nanoparticles (HMPBNPs) in alliance with a low concentration of hydrogen peroxide (H2O2) shows a powerful inhibition effect on bacteria. Our results demonstrate that this therapeutic regime could realize almost full growth inhibition of both Gram-positive (Staphylococcus aureus, S. aureus) and -negative bacteria (Escherichia coli, E. coli), as well as potent inhibition/elimination of the S. aureus biofilm. The wound healing results indicate that combination regime of the antibacterial system could be conveniently used for wound disinfection in vivo and could promote wound healing. To our limited knowledge, this is one of the few pioneer works to apply mild hyperthermia for the combat of bacteria, which provides a novel strategy to inspire future studies.

关键词： HMPBNPs photothermal therapy peroxidase-like activity combination regime

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TNFα antagonist in combination with PD-1 blocker to prevent or retard malignant transformation of B[a]P-induced chronic lung inflammation

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CARCINOGENESIS 2022年第5期43卷 445-456页

作者： Zhao, Ai Li, Fanfan Wei, Cheng Zhou, Zhujun Luo, Xianqiang Wu, Haiming Ning, Chunhong Liu, Wanyu Li, Dong lin, Danni Liu, shuwen Zhang, Guangji Gao, Jimin Zhejiang Univ Sch Med Affiliated Hangzhou Peoples Hosp 1 Dept Geriatr Hangzhou Zhejiang Peoples R China Wenzhou Med Univ Sch Lab Med & Life Sci Key Lab Lab Med Minist Educ Wenzhou 325035 Zhejiang Peoples R China Wenzhou Med Univ Affiliated Hosp 1 Wenzhou Key Lab Hematol Dept Hematol Wenzhou Zhejiang Peoples R China Tianmen First Peoples Hosp Med Lab Tianmen Hubei Peoples R China Nanchang Univ Affiliated Hosp 1 Med Lab Nanchang Jiangxi Peoples R China Xiamen Childrens Hosp Med Lab Xiamen Fujian Peoples R China Zhumadian Cent Hosp Med Lab Zhumadian Henan Peoples R China Harvard Med Sch Boston MA 02115 USA Southern Med Univ Sch Pharmaceut Sci Guangdong Prov Key Lab New Drug Screening Guangzhou 510515 Guangdong Peoples R China Zhejiang Chinese Med Univ Sch Basic Med Sci 866 Yuhangtang Rd Hangzhou 310011 Zhejiang Peoples R China Zhejiang Qixin Biotech Wenzhou Zhejiang Peoples R China

Benzo[a]pyrene (B[a]P) is a typical complete carcinogen in tobacco, but its mechanism of inducing the development of chronic pneumonia and consequent lung cancer is unclear. Here we elucidated the role of myeloid-derived suppressor cells (MDSCs) in developing B[a]P-induced chronic lung inflammation and efficacy of immunotherapy in preventing subsequent malignant transformation. Our study showed that as B[a]P could induce the accumulation of MDSCs in lung tissues and enhance the immunosuppressive effect regulated by cytokines and metabolites, thereby promoting the formation of immunosuppressive microenvironment, where effector T cells were exhausted, NK cells were dysfunctional, regulatory T (Treg) cells were expanded, polarized alveolar macrophages were transformed from M1 to M2. Subsequently, we performed the immunotherapy to block TNFalpha only or both TNFalpha and PD-1 at the early- or middle-stage of B[a]P-induced chronic lung inflammation to ameliorate the immunosuppressive microenvironment. We found that TNFalpha antagonist alone or with PD-1 blocker was shown to exert therapeutic effects on malignant transformation at the early stage of B[a]P-induced chronic lung inflammation. Taken together, our findings demonstrated that B[a]P-induced chronic lung inflammation resulted in the accumulation of MDSCs in lung tissues and exercise their immunosuppressive functions, thereby developing an immunosuppressive microenvironment, thus TNFalpha antagonist alone or with PD-1 blocker could prevent or retard the malignant transformation of B[a]P-induced chronic lung inflammation.

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Fejerlectin, a Lectin-like Peptide from the Skin of Fejervarya limnocharis, Inhibits HIV-1 Entry by Targeting Gp41

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ACS OMEGA 2021年第9期6卷 6414-6423页

作者： Xiong, Weichen Zhou, Chenliang Yin, shuwen Chai, Jinwei Zeng, Baishuang Wu, Jiena Li, Yibin Li, lin Xu, Xueqing Southern Med Univ Sch Pharmaceut Sci Guangdong Prov Key Lab New Drug Screening Guangzhou 510515 Peoples R China Sun Yat Sen Univ Dept Pharm Collaborat Innovat Ctr Canc Med State Key Lab Oncol South ChinaCanc Ctr Guangzhou 510060 Peoples R China

Human immunodeficiency virus type 1 (HIV-1) is mainly transmitted by sexual intercourse, and effective microbicides preventing HIV-1 transmission are still required. Amphibian skin is a rich source of defense peptides with antiviral activity. Here, we characterized a lectin-like peptide, fejerlectin (RLCYMVLPCP), isolated from the skin of the frog Fejervarya limnocharis. Fejerlectin showed significant hemagglutination and D-(+)-galacturonic acid-binding activities. Furthermore, fejerlectin suppressed the early entry of HIV-1 into target cells by binding to the N-terminal heptad repeat of HIV-1 gp41 and preventing 6-HB formation and Env-mediated membrane fusion. Fejerlectin is the smallest lectin-like peptide identified to date and represents a new and promising platform for anti-HIV-1 drug development.

关键词： Anatomy Infectious diseases Viruses Peptides and proteins Assays Toxicity

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Trap-Induced Dense Monocharged Perfluorinated Electret Nanofibers for Recyclable Multifunctional Healthcare Mask

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ACS NANO 2021年第3期15卷 5486-5494页

作者： lin, Shizhe Wang, Shuixiang Yang, Wei Chen, shuwen Xu, Zisheng Mo, Xiwei Zhou, He Duan, Jiangjiang Hu, Bin Huang, Liang Huazhong Univ Sci & Technol Wuhan Natl Lab Optoelect Wuhan 430074 Hubei Peoples R China

Recently, wearable and breathable healthcare devices for air filtering and real-time vital signs monitoring have become urgently needed since virus and particulate matter (PM) cause serious health issues. Herein, we present a trap-induced dense monocharged hybrid perfluorinated electret nanofibrous membrane (HPFM) for highly efficient ultrafine PM0.3 removal with an efficiency of 99.712% under low pressure drop (38.1 Pa) and high quality factor of 0.154 Pa-1. Furthermore, a recyclable multifunctional healthcare mask is constructed by integrating the HPFM-based nanogenerator, which realizes efficient PM0.3 filtering and wireless real-time human respiration monitoring simultaneously. More importantly, the performance of this mask is still relatively stable even at 100%RH humidity and 92 degrees C temperature conditions for 48 h, which infers that it can be reused after disinfection. The strategy of fabricating HPFM provides an approach to obtain charge-rich stable electret materials, and the design of multifunctional masks demonstrates their potential application for future personal protection and health monitoring devices.

关键词： trap real charge perfluorinated polymer electret nanofiber personal protection health monitoring

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竹条铺设间距不同的敷面墙板竖向承载力试验

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材料导报 2024年第S2期38卷 652-657页

作者：杨舒雯潘文苏何先柏文峰邓林昆明理工大学建筑工程学院昆明650500 云南省抗震技术研究中心昆明650500 昆明理工大学建筑与城市规划学院昆明650500

以方木为骨架、正交斜放竹条敷面制成的竹木墙板,其竖向承载力与敷面竹条铺设间距密切相关,在确保竹条敷面墙板满足承载要求的同时,兼顾经济性的竹条铺设间距问题值得探究。本工作设计制作了四组敷面竹条间距不同的竹木墙板试件,通过开... 详细信息

以方木为骨架、正交斜放竹条敷面制成的竹木墙板,其竖向承载力与敷面竹条铺设间距密切相关,在确保竹条敷面墙板满足承载要求的同时,兼顾经济性的竹条铺设间距问题值得探究。本工作设计制作了四组敷面竹条间距不同的竹木墙板试件,通过开展墙板竖向承载力试验,对比分析各墙板的破坏特征与极限承载能力等关键指标,并结合试验荷载-位移曲线和荷载-应变曲线,得出最佳竹条铺设间距。试验结果表明:竹条间距为10 mm与20 mm的墙板均具有较高承载力且二者极限承载能力相当(最大值偏差仅为2.2%),同时,两组墙板中敷面竹条性能发挥也体现出较小差别。因此,在考虑极限承载能力相同的情况下,选择竹条间距为20 mm的墙板在实际应用中可更好地兼顾实用性与经济效益。

关键词：木方骨架正交斜放竹条不同铺设间距竖向承载力

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