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Support design method for deep soft-rock tunnels in non-hydrostatic high in-situ stress field

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Journal of Central South University 2024年第7期31卷 2431-2445页

作者： ZHENG Ke-yue SHI Cheng-hua ZHAO Qian-jin LEI Ming-feng JIA Chao-jun PENG zhu National Engineering Research Center of High-speed Railway Construction Technology Changsha 410075China School of Civil Engineering Central South UniversityChangsha 410075China China Railway Group Co. Ltd.Beijing 100039China

Due to the long-term plate tectonic movements in southwestern China,the in-situ stress field in deep formations is *** passing through deep soft-rock mass under non-hydrostatic high in-situ stress field,tunnels will suffer serious asymmetric *** is no available support design method for tunnels under such a situation in existing studies to clarify the support time and support *** study first analyzed the mechanical behavior of tunnels in non-hydrostatic in-situ stress field and derived the theoretical equations of the ground squeezing curve(GSC)and ground loosening curve(GLC).Then,based on the convergence confinement theory,the support design method of deep soft-rock tunnels under non-hydrostatic high in-situ stress field was established considering both squeezing and loosening *** addition,this method can provide the clear support time and support stiffness of the second layer of initial *** proposed design method was applied to the Wanhe tunnel of the China-Laos railway in *** data indicated that the optimal support scheme had a good effect on controlling the tunnel deformation in non-hydrostatic high in-situ stress *** applications showed that the secondary lining could be constructed properly.

关键词： non-hydrostatic stress field high in-situ stress deep soft-rock tunnel squeezing pressure loosening pressure support design method

Preparation of Corn Stalk-Walnut Shell Mix-based Activated Carbon and Its Adsorption of Malachite Green

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Chemical Research in Chinese Universities 2018年第6期34卷 1014-1019页

作者： KANG Chunli SHANG Dan ya.G ting zhu Ling LIU Fang WANG Nan TIAN Tao Key Laboratory of Groundwater Resources and Environment Ministry of Education Jilin University Changchun 130012 P. R. China

The mix-based activated carbon derived from corn stalk and walnut shell was prepared by chemical activation method using phosphoric acid as the activator. The optimized conditions for preparation were obtained by the orthogonal experiment, the characterizations of the activated carbon were performed by scanning electron microscopy （SEM）, Fourier transform infrared spectroscopy（FTIR）, Boelan＇s titration method and nitrogen adsorption. For the prepared mix-based activated carbon, the highest iodine number, methylene blue number and BET surface area axe 720.5 mg/g, 195.0 mg/g and 1187 m^2/g, respectively, and the pores are mainly mesopores. The mix-based activated carbon shows the higher adsorption capacity for malachite green than the raw materials, the activated carbons prepared only from corn stalk or walnut shell and the commercial activated carbon. The kinetics and thermodynamics of the adsorption can be satisfactorily described by the pseudo-second-order kinetic model and the Langmuir isotherm model, separately.

关键词： Mix-based activated carbon Phosphoric acid activation Adsorption Malachite green

中国65岁及以上老年人肌少症和膳食多样性关系的研究

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现代预防医学 2024年第6期51卷 1005-1011页

作者：钱鸣崎杜俏俏张文雅施蓉芳杨海珍朱小军苏州大学附属第二医院健康管理中心

目的探讨膳食多样性评分(DDS)和老年人肌少症之间的关系。方法利用中国老年健康与家庭幸福调查(CLHLS-HF)2018年的调查数据进行分析。采用2019年亚洲肌少症工作组(AWGS2019)制定的标准评估肌少症。通过构建四个新的DDS指标：总体膳食... 详细信息

目的探讨膳食多样性评分(DDS)和老年人肌少症之间的关系。方法利用中国老年健康与家庭幸福调查(CLHLS-HF)2018年的调查数据进行分析。采用2019年亚洲肌少症工作组(AWGS2019)制定的标准评估肌少症。通过构建四个新的DDS指标：总体膳食、动物性膳食、植物性膳食和不包含豆制品和坚果的植物性膳食评分。采用logistic回归来分析总体膳食、动物性膳食、植物性膳食和不包含豆制品和坚果的植物性膳食的DDS与可能肌少症之间的关联。并进行混杂因素调整、亚组分析及敏感性分析。结果共纳入研究对象2 555名(平均年龄84.4岁),男性1 244人(48.7%),女性1 311人(51.3%)。可能肌少症患病率为63.9%(1 632/2 555),可能肌少症组的DDS明显低于非肌少症组(t=-5.216,P<0.001)。调整混杂因素后，总体膳食(OR=0.544, 95%CI:0.405～0.732),动物性膳食(OR=0.613;95%CI:0.423～0.888),植物性膳食(OR=0.469;95%CI:0.321～0.684)和不包含豆制品和坚果的植物性膳食(OR=0.382;95%CI:0.206～0.709)与肌少症的发生风险均有关联。DDS越高发生可能肌少症的风险越低。敏感性分析显示相关性保持不变。亚组分析结果显示男性人群中总体膳食、动物性膳食和植物性膳食仍然与可能肌少症风险降低相关，而在女性人群中，植物性膳食以及不包含豆制品和坚果的植物性膳食与可能肌少症的风险降低有关。结论膳食多样性是老年人肌少症的保护因素，采用多样化的饮食可能会降低老年人肌少症的风险。

关键词：膳食多样性肌少症植物性膳食老年人

嗜卷书虱Cu/Zn-SOD1,Cu/Zn-SOD2和Fe/Mn-SOD的克隆及对高低温胁迫的响应

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昆虫学报 2024年第1期67卷 1-8页

作者：王潇徐德均朱斌健徐俊延敖国红张长禹韩开宇贵州中烟工业有限责任公司毕节卷烟厂毕节551700 贵州大学昆虫研究所贵州省山地农业病虫害重点实验室贵阳550025 贵州翰高烟叶病虫害防治中心贵阳550009

【目的】揭示嗜卷书虱Liposcelis bostrychophila超氧化物歧化酶基因在响应高低温胁迫中的作用。【方法】通过RT-PCR克隆嗜卷书虱3个超氧化物歧化酶基因Cu/Zn-SOD1,Cu/Zn-SOD2和Fe/Mn-SOD cDNA,利用生物信息学方法分析其序列特征;采用RT... 详细信息

【目的】揭示嗜卷书虱Liposcelis bostrychophila超氧化物歧化酶基因在响应高低温胁迫中的作用。【方法】通过RT-PCR克隆嗜卷书虱3个超氧化物歧化酶基因Cu/Zn-SOD1,Cu/Zn-SOD2和Fe/Mn-SOD cDNA,利用生物信息学方法分析其序列特征;采用RT-qPCR技术检测Cu/Zn-SOD1,Cu/Zn-SOD2和Fe/Mn-SOD在高温(42℃)和低温(4℃)胁迫下0,1和2 h时成虫中的相对表达量。【结果】克隆获得嗜卷书虱LbCu/Zn-SOD1,LbCu/Zn-SOD2和LbFe/Mn-SOD(GenBank登录号分别为OQ938782,OQ938783和OQ938784),开放阅读框(ORF)分别长465,630和636 bp,分别编码154,209和211个氨基酸,编码蛋白质相对分子量分别为15.85,22.33和23.72 kD,等电点分别为6.17,7.68和6.79;LbCu/Zn-SOD1和LbCu/Zn-SOD2分别具有1个和2个Cu/Zn超氧化物歧化酶特征,LbFe/Mn-SOD具有1个Fe/Mn超氧化物歧化酶特征。系统进化分析结果表明,昆虫Cu/Zn-SOD1,Cu/Zn-SOD2和Fe/Mn-SOD高度保守。高温42℃胁迫诱导嗜卷书虱成虫中LbCu/Zn-SOD1,LbCu/Zn-SOD2和LbFe/Mn-SOD的表达,其中LbCu/Zn-SOD1和LbCu/Zn-SOD2表达量在1和2 h时均显著高于对照;LbFe/Mn-SOD表达量在1 h时显著低于对照,而在2 h时显著高于对照。低温4℃胁迫下,与对照相比,嗜卷书虱成虫中LbCu/Zn-SOD1和LbCu/Zn-SOD2的表达量在1 h时无显著差异,而LbFe/Mn-SOD的表达量显著降低,LbCu/Zn-SOD1,LbCu/Zn-SOD2和LbFe/Mn-SOD的表达量在2 h时均显著升高。【结论】超氧化物歧化酶基因LbCu/Zn-SOD1,LbCu/Zn-SOD2和LbFe/Mn-SOD参与了嗜卷书虱对极端温度胁迫的耐受性。

关键词：嗜卷书虱超氧化物歧化酶基因克隆温度胁迫表达分析

Hydrothermal conversion of Ti-containing minerals in system of Na_2O–Al_2O_3–SiO_2–CaO–TiO_2–H_2O

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Rare Metals 2016年第6期35卷 495-501页

作者： ya.-Xiu Wang ting-An Zhang Guo-Zhi Lv Xiao-Feng zhu Wei-Guang Zhang Li-Qun Xie Key Laboratory for Ecological Utilization of Multimetallic Mineral Ministry of Education Northeastern University Shenyang 110819 China

Titanium has a great effect on the digestion of bauxite in the Bayer process because it reacts readily at high temperatures in alkaline sodium aluminate solution. Under this consideration, the hydrothermal conversion of Ti-containing minerals in the system of Na2O-Al2O3- SiO2-CaO-TiOz-H2O with increased temperatures was studied based on the thermodynamic analysis and systematic experiments. The results show that anatase converts to AlaTi2SiO12 at low temperatures （60-120℃）, which is similar to anatase in crystal structure. As the temperature continues to rise, Al4Ti2SiO12 decomposes gradually and converts to Ca3TiSi2（Al2Si0.5Ti0.5）O14 at 200 ℃ When the temperature reaches 260℃, CaTiO3 forms as the most stable titanate species for its hexagonal closest packing with O^2- and Ca^2＋. The findings enhance the under-standing of titanate scaling in the Bayer process and clarify the mechanism of how additive lime improves the digestion of diaspore.

关键词： Hydrothermal conversion Ti-containing minerals Bayer process Anatase Aluminosilicate

A pilot study of the differentiated landscape of peripheral blood mononuclear cells from children with incomplete versus complete Kawasaki disease

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World Journal of Pediatrics 2024年第2期20卷 189-200页

作者： Shu-Na Sun ya. Zhou Xing Fu Yuan-Zheng Zheng Cao Xie Guo-You Qin Fang Liu Chen Chu Feng Wang Cheng-Long Liu Qing-Tong Zhou De-Hua ya.g Di zhu Ming-Wei Wang Yong-Hao Gui Children's Hospital of Fudan University National Children's Medical CenterShanghai 201102China The National Center for Drug Screening Shanghai Institute of Materia MedicaChinese Academy of SciencesShanghai 201203China Accuramed Technology(Shanghai)Ltd. Shanghai 200233China School of Pharmacy Fudan UniversityShanghai 201203China School of Public Health Fudan UniversityShanghai 200032China Department of Pharmacology School of Basic Medical SciencesFudan UniversityShanghai 200032China Research Center for Deepsea Bioresources Sanya 572025China Department of Chemistry School of ScienceThe University of TokyoTokyo 113-0033Japan School of Pharmacy Hainan Medical UniversityHaikou 570288China

Kawasaki disease(KD)is a disorder of immune *** prevalence of KD among 100,000 children aged 0-4 years was 71.9-110.0 in China,170.9-194.9 in Korea,and 18.1-21.3 in the USA[1].The most severe complication of KD is coronary artery lesions(CALs),including coronary dilatation and coronary aneurysms,which may even lead to myocardial ischemia,myocardial infarction,and sudden death.

关键词： coronary ischemia differentiated

Correlation between Neutrophil Percentage-to-albumin Ratio and Coronary Heart Disease Complicated with Diabetes Mellitus

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Medicinal Plant 2024年第2期15卷 43-47页

作者： Wenjing ZHANG Yuhong SHI Guilan ZHANG Minghui ZHANG Zhoukai CUI Jiaying WANG Anjun zhu Pingquan County Hospital Pingquan 067500China

[Objectives]This study was conducted to explore the relationship between neutrophil percentage-to-albumin ratio(NPAR)and coronary heart disease complicated with diabetes.[Methods]A total of 603 patients with coronary heart disease who underwent coronary angiography in Pingquan County Hospital from January,2023 to December,2023 and met the inclusion criteria were included as the research *** the patients were divided into a coronary heart disease complicated with diabetes group(CAD+T2DM group)(n=298 cases)and a control group(CAD group)(n=305 cases),according to patients medical history,heart color ultrasound and biochemical test *** clinical data,biochemical test results and coronary artery imaging data of patients were recorded,and the Gensini score was *** neutrophil percentage(NEUT%)and albumin count were determined to calculate NPAR.[Results]The NPAR value of the coronary heart disease complicated with diabetes mellitus group was(1.6±0.42),which was significantly higher than that of the control group(1.47±0.49),and the difference was statistically significant(P<0.05).The area under the ROC curve was 0.619(95%CI:0.591-0.675,P<0.05),and the prediction of coronary heart disease complicated with diabetes using NPAR showed a Youden index of 0.31,a sensitivity of 60.4%,a specificity of 40.3%,and a best cut-off score of 1.4506.[Conclusions]The neutrophil percentage-to-albumin ratio(NPAR)is closely related to coronary heart disease complicated with diabetes mellitus,and NPAR has clinical application value in the diagnosis of coronary heart disease complicated with diabetes mellitus.

关键词： Neutrophil percentage-to-albumin ratio(NPAR) Gensini score Coronary heart disease Coronary angiography

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非晶合金药型罩的射流仿真及结构设计

兵器材料科学与工程 2024年第5期47卷 92-99页

作者：周秉文杜恩轩赵进北鞠鹏程朱梦奇孟令刚亚斌张兴国大连理工大学材料科学与工程学院辽宁大连116024 大连理工大学宁波研究院浙江宁波315061

采用Ls-dyna软件中的光滑粒子流体动力学(SPH)方法对非晶合金药型罩的射流成形进行数值仿真,侵彻仿真用软件中的多物质ALE算法和流固耦合,并进行试验验证。结果表明:72°锥角非晶合金药型罩的射流形态、性能更好,射流为连续性非凝聚态,... 详细信息

采用Ls-dyna软件中的光滑粒子流体动力学(SPH)方法对非晶合金药型罩的射流成形进行数值仿真,侵彻仿真用软件中的多物质ALE算法和流固耦合,并进行试验验证。结果表明:72°锥角非晶合金药型罩的射流形态、性能更好,射流为连续性非凝聚态,锥角为72°,壁厚为2.5 mm的非晶合金药型罩穿深约为铜药型罩的86%,孔径约为铜药型罩的1.46倍,仿真结果与试验结果误差小于10%。药型罩中部对非晶合金射流成形和性能影响最大。根据非晶合金射流特征设计了一种新型药型罩结构,其侵彻45#钢穿深比锥形非晶合金药型罩提高约12%,达到相同锥角的锥形铜药型罩的穿深,孔径比铜药型罩高约44%,为非晶合金药型罩结构设计提供参考。

关键词：非晶合金药型罩有效射流结构设计

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4-羟基-2,5-二甲基-3(2H)-呋喃酮的生物与非生物的合成途径研究进展

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食品与发酵工业 2024年第4期50卷 329-336页

作者：俞兆斌朱丽霞塔里木大学食品科学与工程学院新疆阿拉尔843300 南疆特色农产品深加工兵团重点实验室新疆阿拉尔843300

4-羟基-2,5-二甲基-3(2H)-呋喃酮(4-hydroxy-2,5-dimethyl-3(2H)-furanone,HDMF)是一种具有焦糖香的天然活性产物,在食品工业中具有极高的应用价值。该文对HDMF化学合成、美拉德反应、酶法催化、植物合成代谢以及微生物合成途径进行了... 详细信息

4-羟基-2,5-二甲基-3(2H)-呋喃酮(4-hydroxy-2,5-dimethyl-3(2H)-furanone,HDMF)是一种具有焦糖香的天然活性产物,在食品工业中具有极高的应用价值。该文对HDMF化学合成、美拉德反应、酶法催化、植物合成代谢以及微生物合成途径进行了全面阐述。化学合成为工业合成主要方法,但是存在原料价格昂贵、溶剂残留等问题;美拉德反应是热加工食品中形成HDMF的重要方式;植物合成代谢途径是农产品中形成HDMF的重要途径,形成路径较为清晰,但工业应用受到限制;微生物合成HDMF具有绿色可持续发展特性,但相关研究滞后,微生物代谢途径目前不清晰或存在争议,缺乏对关键底物、代谢途径及关键酶系等的基础认知,是今后利用微生物途径合成HDMF急需要解决的重要科学问题。

关键词：呋喃酮化学合成美拉德反应酶法合成植物合成微生物代谢