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Mechanical responses of underground carriageway structures due to construction of metro tunnels beneath the existing structure:A case study

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Deep Underground Science and Engineering 2024年第2期3卷 231-246页

作者： Xin Han Fei Ye Xingbo Han Chao Ren jing song Ruliang Zhao School of Highway Chang'an UniversityXi'anChina Shandong Province Transportation Planning and Design Institute JinanChina China Water Resources Beifang Investigation Design and Research Co.Ltd.TianjinChina

To understand the mechanical response pattern of the existing structure and ground due to the construction of metro tunnels underneath,the finite difference method is adopted to study the torsional deformation and stress variation of the existing structure and the effect of underground carriageway structures on the surface subsidence.The curves of the maximum differential subsidence,torsion angle,and distortion of the cross-section of the existing structure show two peaks in succession during traversing of two metro tunnels beneath it.The torsion angle of the existing structure changes when the two tunnels traverse beneath it in opposite directions.The first traversing of the shield tunnel mainly induces the magnitude variation in torsional deformation of the existing structure,but the second traversing of the subsurface tunnel may cause a dynamic change in the magnitude and form of torsional deformation in the existing structure.The shielding effect can reduce the surface subsidence caused by metro tunnel excavation to a certain extent,and the development trend of subsidence becomes slower as the excavation continues.

关键词： metro tunnel numerical simulation structural deformation surface subsidence underground carriageway structure

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Improving mathematical model of burden distribution and correcting chute angle to cope with fluctuation of stock line

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Journal of Iron and Steel Research(International) 2024年第2期31卷 342-356页

作者： Jian-sheng Chen Wen-guo Liu Hao Guo Wang Ding Qing-guo Xue jing-song Wang Hai-bin Zuo State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing100083China MCC Capital Engineering&Research Incorporation Limited Beijing100176China Hunan Valin Xiangtan Iron and Steel Co. Ltd.Xiangtan411101HunanChina

Accurate evaluations of the burden distribution are of critical importance to stabilize the operation of blast furnace.The mathematical model and discrete element method(DEM)are two attractive methods for predicting burden distribution.Based on DEM,the initial velocities of the pellet,sinter,and coke were calculated,and the velocity attenuations of the above three particles between the burden and the chute were analyzed.The initial velocity and velocity attenuation were applied to a mathematical model for improving the accuracy.Additionally,based on the improved model,a scheme for rectifying the chute angles was proposed to address the fluctuation of the stock line and maintain a stable burden distribution.The validity of the scheme was confirmed via a stable burden distribution under different stock lines.The mathematical model has been successfully applied to evaluate the online burden distribution and cope with the fluctuation of the stock line.

关键词： Burden distribution Mathematical model Discrete element method Velocity attenuation Stock line fluctuation

digital micromirror device;flat-top beam;orbital angular momentum;perfect vortex beam;random fiber laser

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High Power Laser Science and Engineering 2024年第1期12卷 42-51页

作者： Rui Ma Ke Hai Luo jing song He Wei Li Zhang Dian Yuan Fan Anderson S.L.Gomes Jun Liu International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education Institute of Microscale OptoelectronicsShenzhen UniversityShenzhenChina Institute for Advanced Study Shenzhen UniversityShenzhenChina Fiber Optics Research Centre School of Information and Communication EngineeringUniversity of Electronic Science and Technology of ChinaChengduChina Departamento de Física Universidade Federal de PernambucoRecife-PEBrazil

High-intensity vortex beams with tunable topological charges and low coherence are highly demanded in applications such as inertial confinement fusion(ICF) and optical communication. However, traditional optical vortices featuring nonuniform intensity distributions are dramatically restricted in application scenarios that require a high-intensity vortex beam owing to their ineffective amplification resulting from the intensity-dependent nonlinear effect. Here, a low-coherence perfect vortex beam(PVB) with a topological charge as high as 140 is realized based on the super-pixel wavefront-shaping technique. More importantly, a globally adaptive feedback algorithm(GAFA) is proposed to efficiently suppress the original intensity fluctuation and achieve a flat-top PVB with dramatically reduced beam speckle contrast. The GAFA-based flat-top PVB generation method can pave the way for high-intensity vortex beam generation,which is crucial for potential applications in ICF, laser processing, optical communication and optical trapping.

关键词： digital micromirror device flat-top beam orbital angular momentum perfect vortex beam random fiber laser

Effect of Jianpi Shengxue Tablet on Iron Metabolism and Nutritional Status in Patients with Renal Anemia:A Prospective,Randomized,Open,Parallel Controlled and Multicenter Clinical Study

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Current Medical Science 2024年第3期44卷 603-610页

作者： Juan YANG Meng-yuan LIANG Yu LI Hao ZHANG Wei LI jing LV Li-ping DONG jing-song JIN Cheng YANG Qing-hong ZHANG Li LONG Rong ZOU Yi GAO Dan song Chun-qin PAN Ying YAO Xiao-lin ZHAN Xiao-hui WANG Department of Nephrology Tongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan430030China Department of Nephrology The First People’s Hospital of GuiyangGuiyang550000China Department of Nephrology The Third Xiangya HospitalCentral South UniversityChangsha410000China Department of Nephrology The First Affiliated Hospital of Xi’an Jiaotong UniversityXi’an710061China Department of Nephrology Wuhan No. 4 HospitalWuhan430033China Department of Nephrology Hubei Provincial Hospital of Traditional Chinese MedicineWuhan430060China Department of Nephrology Central Theater General Hospital of PLAWuhan430064China Department of Nephrology Taihe HospitalShiyan442000China Department of Nephrology Third People’s Hospital of Hubei ProvinceWuhan430033China Department of Nephrology Hubei Province Integrated Traditional Chinese and Western Medicine Hospital of Hubei provinceWuhan430024China Department of Nephrology Xi’an No.3 HospitalAffiliated Hospital of Northwest UniversityXi’an710000China Department of Nephrology Shenzhen Guangming District People’s HospitalShenzhen518000China Department of Nephrology Xiantao First People’s HospitalXiantao433000China Department of Nutrition Tongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan430030China Department of Nephrology Huangshi Central HospitalHuangshi435000China Department of Nephrology The Fifth Hospital of WuhanWuhan430050China

Objective This study aimed to analyze the clinical efficacy of the Jianpi Shengxue tablet for treating renal anemia.Methods A total of 200 patients with renal anemia from December 2020 to December 2022 were enrolled and randomly divided into two groups.Patients in the control group were treated with polysaccharide-iron complex,and those in the experimental group were administered Jianpi Shengxue tablet.After 8 weeks of continuous treatment,the therapeutic outcomes regarding anemia were compared between the two groups.Results After treatment,the red blood cell(RBC)count,hematocrit(HCT),reticulocyte percentage(RET),ferritin(SF),serum iron(SI),transferrin saturation(TSAT),and serum albumin(ALB)all increased(P<0.01),and the clinical symptom score and total iron binding capacity decreased(P<0.01)in the experimental group.Moreover,the improvements in RBC,HCT,RET,SF,SI,TAST,ALB,and clinical symptoms(fatigue,anorexia,dull skin complexion,numbness of hands and feet)in the experimental group were significantly greater than those in the control group(P<0.05).The total effective rate for treating renal anemia was significantly higher in the experimental group than in the control group(P<0.01).Conclusion The Jianpi Shengxue tablet demonstrates efficacy in treating renal anemia,leading to significant improvements in the laboratory examination results and clinical symptoms of patients with renal anemia.

关键词： Jianpi Shengxue tablet renal anemia randomized open parallel control multicenter clinical study

High-density lipoprotein regulates angiogenesis by affecting autophagy via miRNA-181a-5p

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Science China(Life Sciences) 2024年第2期67卷 286-300页

作者： Bi-Ang Kang Hua-Ming Li Ya-Ting Chen Meng-Jie Deng Yan Li Yue-Ming Peng Jian-Jun Gao Zhi-Wei Mo Jia-Guo Zhou Zhi-Jun Ou jing-song Ou Division of Cardiac Surgery Cardiovascular Diseases InstituteThe First Affiliated HospitalSun Yat-sen UniversityGuangzhou 510080China National-Guangdong Joint Engineering Laboratory for Diagnosis and Treatment of Vascular Diseases Guangzhou 510080China NHC key Laboratory of Assisted Circulation(Sun Yat-sen University) Guangzhou 510080China Guangdong Provincial Engineering and Technology Center for Diagnosis and Treatment of Vascular Diseases Guangzhou 510080China Division of Vascular Surgery The First Affiliated HospitalSun Yat-sen UniversityGuangzhou 510080China Department of Pharmacology Cardiac and Cerebral Vascular Research CenterZhongshan School of MedicineSun Yat-sen UniversityGuangzhou 510080China Division of Hypertension and Vascular Diseases Department of CardiologyCardiovascular Diseases InstituteThe First Affiliated HospitalSun Yat-sen UniversityGuangzhou 510080China Guangdong Provincial Key Laboratory of Brain Function and Disease Zhongshan School of MedicineSun Yat-sen UniversityGuangzhou 510080China

We previously demonstrated that normal high-density lipoprotein(nHDL)can promote angiogenesis,whereas HDL from patients with coronary artery disease(d HDL)is dysfunctional and impairs angiogenesis.Autophagy plays a critical role in angiogenesis,and HDL regulates autophagy.However,it is unclear whether n HDL and d HDL regulate angiogenesis by affecting autophagy.Endothelial cells(ECs)were treated with n HDL and d HDL with or without an autophagy inhibitor.Autophagy,endothelial nitric oxide synthase(e NOS)expression,miRNA expression,nitric oxide(NO)production,superoxide anion(O2^(·-))generation,EC migration,and tube formation were evaluated.n HDL suppressed the expression of miR-181a-5p,which promotes autophagy and the expression of e NOS,resulting in NO production and the inhibition of O2^(·-)generation,and ultimately increasing in EC migration and tube formation.d HDL showed opposite effects compared to n HDL and ultimately inhibited EC migration and tube formation.We found that autophagy-related protein 5(ATG5)was a direct target of miR-181a-5p.ATG5 silencing or miR-181a-5p mimic inhibited n HDL-induced autophagy,e NOS expression,NO production,EC migration,tube formation,and enhanced O2^(·-)generation,whereas overexpression of ATG5 or miR-181a-5p inhibitor reversed the above effects of d HDL.ATG5 expression and angiogenesis were decreased in the ischemic lower limbs of hypercholesterolemic low-density lipoprotein receptor null(LDLr^(-/-))mice when compared to C57BL/6 mice.ATG5 overexpression improved angiogenesis in ischemic hypercholesterolemic LDLr^(-/-)mice.Taken together,nHDL was able to stimulate autophagy by suppressing miR-181a-5p,subsequently increasing e NOS expression,which generated NO and promoted angiogenesis.In contrast,d HDL inhibited angiogenesis,at least partially,by increasing miR-181a-5p expression,which decreased autophagy and e NOS expression,resulting in a decrease in NO production and an increase in O2^(·-)generation.Our findings reveal a novel mechanism by which HDL affects angiogenesis b

关键词： high-density lipoprotein angiogenesis autophagy ATG5 miRNA endothelial nitric oxide synthase

A Bayesian network for estimating hypertension risk due to occupational aluminum exposure

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Chronic Diseases and Translational Medicine 2024年第2期10卷 130-139页

作者： Le Zhao Jinzhu Yin Jiaping Huan Xiao Han Dan Zhao jing song Linping Wang Huifang Zhang Baolong Pan Qiao Niu Xiaoting Lu Department of Occupational Health School of Public HealthShanxi Key Laboratory of Environmental Health Impairment and PreventionMOE Key Laboratory of Coal Environmental Pathogenicity and PreventionShanxi Medical UniversityTaiyuanShanxiChina Sinopharm Tongmei General Hospital Shanxi Health Commission Key Laboratory of Nervous System Disease Prevention and TreatmentDatongShanxiChina Sixth Hospital of Shanxi Medical University(General Hospital of Tisco) TaiyuanShanxiChina

Background The correlation between metals and hypertension,such as sodium,zinc,potassium,and magnesium,has been confirmed,while the relationship between aluminum and hypertension is not very clear.This study aimed to evaluate the correlation between plasma aluminum and hypertension in electrolytic aluminum workers by the Bayesian networks(BN).Methods In 2019,476 male workers in an aluminum factory were investigated.The plasma aluminum concentration of workers was measured by inductively coupled plasma mass spectrometry.The influencing factors on the prevalence of hypertension were analyzed by the BN.Results The prevalence of hypertension was 23.9%in 476 male workers.The risk of hypertension from plasma aluminum in the Q2,Q3,and Q4 groups was 5.20(1.90–14.25),6.92(2.51–19.08),and 7.33(2.69–20.01),respectively,compared with that in the Q1 group.The risk of hypertension from the duration of exposure to aluminum of>10 years was 2.23(1.09–4.57),compared without aluminum exposure.Area under the curve was 0.80 of plasma aluminum and the duration of exposure to aluminum was based on covariates,indicating that aluminum exposure had important predictive value in the prevalence of hypertension in the occupational population.The results of the study using the BN model showed that if the plasma aluminum of all participants was higher than Q4(≥47.86µg/L)and the participants were drinking,smoking,diabetes,central obesity,dyslipidemia,and aged>50 years,the proportion of hypertension was 71.2%.Conclusions The prevalence of hypertension increased significantly with the increase of plasma aluminum level.

关键词： Bayesian networks hypertension occupational aluminum exposure

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电子商务环境下的跨区域供应链管理模式

山西财经大学学报 2024年第S1期46卷 151-153页

作者：宋海静韩国京畿大学经营学院韩国首尔03746

电子商务是当前全球经济发展的重要趋势之一,在电子商务环境下进行跨区域供应链管理模式研究已成为当前商业领域的热点之一。在大数据时代,海量数据逐渐成为支撑决策的重要依据,利用数据挖掘和人工智能技术处理海量数据可以为跨区域供... 详细信息

电子商务是当前全球经济发展的重要趋势之一,在电子商务环境下进行跨区域供应链管理模式研究已成为当前商业领域的热点之一。在大数据时代,海量数据逐渐成为支撑决策的重要依据,利用数据挖掘和人工智能技术处理海量数据可以为跨区域供应链管理提供更加准确的决策依据。基于此,首先分析当前电子商务环境下跨区域供应链管理需考虑的因素并阐述大数据技术在其中的作用,之后对电子商务环境下的跨区域供应链管理模式构建进行分析,为实现跨区域供应链的高效协同运作提供参考。

关键词：大数据电子商务跨区域供应链管理

“一带一路”倡议与参建企业双元创新平衡——基于战略三支柱理论的洞察

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管理评论 2024年第3期36卷 73-85页

作者：宋竞李晓庆西南交通大学经济管理学院/服务科学与创新四川省重点实验室成都610031

企业创新是制度因素、行业因素和企业内部资源因素合力而为的结果。文章借鉴战略三支柱理论,结合制度观、行业观和资源观考察了“一带一路”倡议对企业双元创新平衡的直接影响以及产品市场竞争和企业财务冗余在其间所产生的调节作用。... 详细信息

企业创新是制度因素、行业因素和企业内部资源因素合力而为的结果。文章借鉴战略三支柱理论,结合制度观、行业观和资源观考察了“一带一路”倡议对企业双元创新平衡的直接影响以及产品市场竞争和企业财务冗余在其间所产生的调节作用。将“一带一路”倡议的提出视为一次准自然实验,使用2010—2019年A股上市公司数据,利用双重差分法进行了实证检验,结果显示:“一带一路”倡议的提出显著提高了参建企业双元创新的平衡能力,并且对民营企业、新兴优势产业企业和外向型节点城市企业的促进效应更为显著。由于竞争效应,产品市场竞争程度的提高进一步增强了“一带一路”倡议对参建企业双元创新平衡能力的促进作用,而财务冗余的增加则因委托代理问题的加剧削弱了两者间的正向关系。

关键词： “一带一路” 产品市场竞争财务冗余双元创新平衡战略三支柱理论

The RAS/PI3K Pathway is Involved in the Impairment of Long-term Potentiation Induced by Acute Aluminum Treatment in Rats

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Biomedical and Environmental Sciences 2016年第11期29卷 782-789页

作者： song jing LIU Ying ZHANG Hui Fang NIU Qiao Department of Occupational Health School of Public HealthShanxi Medical University

Objective To explore the role of RAS/PI3K pathway in the impairment of long-term potentiation （LTP） induced by acute aluminum （AI） treatment in rats in vivo. Methods First, different dosages of aluminum-maltolate complex [Al（mal）3] were given to rats via acute intracerebroventricular （i.c.v.） injection. Following AI exposure, the RAS activity of rat hippocampus were detected by ELISA assay after the hippocampal LTP recording by field potentiation technique in vivo. Second, the antagonism on the aluminum-induced suppression of hippocampal LTP was observed after the treatment of the RAS activator epidermal growth factor （EGF）. Finally, the antagonism on the downstream molecules （PKB activity and the phosphorylation of GluR1 $831 and $845） were tested by ELISA and West-blot assays at the same time. Results With the increasing aluminum dosage, a gradually decreasing in RAS activity of the rat hippocampus was produced after a gradually suppressing on LTP. The aluminum-induced early suppression of hippocampal LTP was antagonized by the RAS activator epidermal growth factor （EGF）. And the EGF treatment produced changes similar to those observed for LTP between the groups on PKB activity as well as the phosphorylation of GluR1 S831 and s845. Conclusion The RAS-PI3K/PKB-GluR1 S831 and S845 signal transduction pathway may be involved in the inhibition of hippocampal LTP by aluminum exposure in rats. However, the mechanisms underlying this observation need further investigation.

关键词： Aluminum Long-term potentiation RAS PKB AMPA receptor