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Influence of water coupling coefficient on the blasting effect of red sandstone specimens

International Journal of Coal Science & Technology 2024年第1期11卷 148-166页

作者： Yang Li Renshu Yang Yanbing wang Dairui Fu School of Mechanics and Civil Engineering China University of Mining and Technology(Beijing)Beijing100083China School of Civil and Resource Engineering University of Science and Technology BeijingBeijing100083China

This study investigates the impact of different water coupling coefficients on the blasting effect of red *** analysis is based on the theories of detonation wave and elastic wave,focusing on the variation in wall pressure of the blasting *** DDNP explosive as the explosive load,blasting tests were conducted on red sandstone specimens with four different water coupling coefficients:1.20,1.33,1.50,and *** study examines the morphologies of the rock specimens after blasting under these different water coupling ***,the fractal dimensions of the surface cracks resulting from the blasting were calculated to provide a quantitative evaluation of the extent of rock *** scanning and 3D reconstruction were performed on the post-blasting specimens to visually depict the extent of damage and fractures within the ***,the volume fractal dimension and damage degree of the post-blasting specimens are *** findings are then combined with numerical simulation to facilitate auxiliary *** results demonstrate that an increase in the water coupling coefficient leads to a reduction in the peak pressure on the hole wall and the crushing zone,enabling more of the explosion energy to be utilized for crack propagation following the *** specimens exhibited distinct failure patterns,resulting in corresponding changes in fractal *** simulated pore wall pressure–time curve validated the derived theoretical results,whereas the stress cloud map and explosion energy-time curve demonstrated the buffering effect of the water *** the water coupling coefficient increases,the buffering effect of the water medium becomes increasingly prominent.

关键词： Water coupling coefficient Radial uncoupled charge Numerical simulation Fractal dimension

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Recent advances in cobalt phosphide-based materials for electrocatalytic water splitting:From catalytic mechanism and synthesis method to optimization design

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Nano Materials Science 2024年第2期6卷 139-173页

作者： Rongrong Deng Mengwei Guo Chaowu wang Qibo Zhang Key Laboratory of Ionic Liquids Metallurgy Faculty of Metallurgical and Energy EngineeringKunming University of Science and TechnologyKunming650093PR China State Key Laboratory of Complex Nonferrous Metal Resources Cleaning Utilization in Yunnan Province Kunming650093PR China

Electrochemical water splitting has long been considered an effective energy conversion technology for trans-ferring intermittent renewable electricity into hydrogen fuel,and the exploration of cost-effective and high-performance electrocatalysts is crucial in making electrolyzed water technology commercially *** phosphide(Co-P)has emerged as a catalyst of high potential owing to its high catalytic activity and durability in water *** paper systematically reviews the latest advances in the development of Co-P-based materials for use in water *** essential effects of P in enhancing the catalytic performance of the hydrogen evolution reaction and oxygen evolution reaction are first ***,versatile synthesis techniques for Co-P electrocatalysts are summarized,followed by advanced strategies to enhance the electrocatalytic performance of Co-P materials,including heteroatom doping,composite construction,integration with well-conductive sub-strates,and structure control from the viewpoint of *** with these optimization strategies,the understanding of the inherent mechanism of enhanced catalytic performance is also ***,some existing challenges in the development of highly active and stable Co-P-based materials are clarified,and pro-spective directions for prompting the wide commercialization of water electrolysis technology are proposed.

关键词： Co-P electrocatalysts Water splitting Hydrogen production Catalytic mechanism Synthesis technique Optimization design

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Impact pressure of waves generated by landslides on bank slopes

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Journal of Mountain Science 2024年第3期21卷 918-931页

作者： CAO Ting wang Pingyi QIU Zhenfeng LIU Jie Key Laboratory of Hydraulic and Waterway Engineering of Ministry of Education Chongqing Jiaotong UniversityChongqing 400074China Engineering Research Center of Diagnosis Technology and Instruments of Hydro-Construction Chongqing Jiaotong UniversityChongqing 400074China

Impulse waves that are generated by landslides in narrow reservoir areas threaten the stability of buildings and bank *** discuss the action process and evolution law of the wave pressure on bank slopes,a three-dimensional physical model test that considers impulse waves generated by landslides was performed,and factors including landslide width,thickness,slope angles of the sliding surface,and bank slope angle were *** on wave forms on the bank slopes,wave pressure curve characteristics,and peak value,the action process of wave pressure could be divided into the following stages:maximum pulsating pressure stage,wave impact stage(when waves break),and stationary pulsation *** was found that wave breaking is dependent on the value of the surf similarity parameterξ.The distribution pattern of impact pressure decays linearly on both sides of the maximum impact pressure point,and the attenuation degree decreases when it attains 40%of the maximum ***,it is proposed that the prediction formula for the maximum effective impact pressure of the bank slope be related to the reciprocal of wave steepness,relative water depth,and slope *** prediction formula provides strong theoretical support for early safety warning and for predicting the bank slope under impulse waves generated by landslides.

关键词： Model test Impact pressure Action stage Breaking discrimination Distribution model

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Biotransformation of 6:2 fluorotelomer sulfonate(6:2 FTS)in sulfur-rich media by Trametopsis cervina

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Frontiers of Environmental Science & Engineering 2024年第9期18卷 17-26页

作者： Felix Grimberg Thomas M Holsen Sujan Fernando Siwen wang Department of Civil and Environmental Engineering Clarkson UniversityPotsdamNew York 13699USA

Biotransformation of 6:2 fluorotelomer sulfonate(6:2 FTS)by two species of white-rot fungi,Pleurotus ostreatus(***)and Trametopsis cervina(***),was investigated in a sulfurrich medium designed to stimulate production of lignin-degrading *** of 6:2 FTS was observed by *** over the study period of 30 d,but not by *** rates were comparable to those found in other studies investigating mixed culture degradation in nonsulfur limiting media,with approximately 50 mol%of applied 6:2 FTS removed after 30 *** transformation products were short-chain perfluorocarboxylic acids(PFCAs),including PFHxA(2.27 mol%),PFPeA(0.24 mol%),and PFBA(0.28 mol%).The main intermediate products include 5:2 sFTOH(16.3 mol%)and 5:3 FTCA(2.99 mol%),while 6:2 FTCA,6:2 FTuCA,and 5:2 ketone were also identified at low *** 60 mol%of detected products were assigned to the major pathway to 5:2 ketone,and 40 mol%were assigned to the minor pathway to 5:3 *** overall molar balance was found to decrease to 75 mol%by Day 30,however,was closed to near 95 mol%with a theoretical estimation for the volatile intermediates in the headspace,5:2 ketone and 5:2 *** different capabilities of the two white-rot fungal species for 6:2 FTS biotransformation in sulfur-rich media suggest that the enzyme processes of *** to de-sulfonate 6:2 FTS may be unrelated to sulfur metabolism.

关键词： White-rot fungus 6:2 fluorotelomer sulfonate(6:2 FTS) Biotransformation Sulfur-rich medium Intermediate products

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Experimental Investigation of Wave-Current Loads on a Bridge Shuttle-Shaped Cap–Pile Foundation

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Fluid Dynamics & Materials Processing 2024年第7期20卷 1565-1592页

作者： Chenkai Hong Zhongda Lyu Fei wang Zhuo Zhao Lei wang College of Science and Technology Ningbo UniversityNingbo315300China Engineering Research Center of Industrial Construction in Civil Engineering of Zhejiang Province Ningbo University of TechnologyNingbo315211China

To scrutinize the characteristics of wave-current loads on a bridge shuttle-shaped cap–pile foundation,a 1:125 test model was considered in a laboratory *** inline,transverse and vertical wave–current forces acting on the shuttle-shaped cap-pile group model were measured considering both random waves and a combination of random waves with a *** experimental results have shown that the wave-current forces can be well correlated with the wave height,the wavelength,the current velocity,the incident direction and the water level in the marine *** increase in the current velocity can lead to a sharp increase in the inline and transverse wave-current forces,while the vertical wave-current force ***,the wave-current forces are particularly strong when a combination of high tide,strong wave and strong current is considered.

关键词： Shuttle-shaped cap-pile foundation wave-current force wave flume experiment sea-crossing bridge

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基于方剂靶点谱效关系的中成药临床精准定位模式探索——以芪蛭通络胶囊为例

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中国实验方剂学杂志 2024年第3期30卷 98-104页

作者：于亚南李兵刘骏王忠中国中医科学院中医临床基础医学研究所北京100700 中国中医科学院中药研究所北京100700

中成药临床价值是中药产业发展的核心方向。“精准化”的临床定位决定了从哪个角度证明药物的价值,是凸显临床价值的关键环节。该文以中成药“芪蛭通络胶囊”临床定位研究为例,展示“方剂靶点谱效比较-方剂核心价值发现-临床定位试验确... 详细信息

中成药临床价值是中药产业发展的核心方向。“精准化”的临床定位决定了从哪个角度证明药物的价值,是凸显临床价值的关键环节。该文以中成药“芪蛭通络胶囊”临床定位研究为例,展示“方剂靶点谱效比较-方剂核心价值发现-临床定位试验确证”的中成药临床精准定位关键技术框架。该技术框架靶向临床精准定位需要解决的系列问题,在临床试验开展前,基于方剂多组分、多靶点及临床适应证多表型数据的多组学网络分析技术,发现中药品种的核心价值,预测其可能的临床优势,继而再针对其预测的临床优势选择合理的疗效指标,结合动态灵活的创新性临床试验判断及验证其临床疗效,提高临床定位的成功率。该研究模式将“组学技术”与“循证”相结合,定位“精准循证”的理念,旨在为建立具有中医药特色的中成药上市后精准用药与定位提供一种新的策略与方法,也为中医学走向精准医学提供更多技术层面的思考。

关键词：方剂组学临床定位靶点谱效精准循证芪蛭通络胶囊

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Pilodyn在日本落叶松材性育种中应用的初步研究

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林业科学研究 2008年第6期21卷 808-812页

作者：王军辉张守攻张建国孙晓梅朱景乐梁保松祁万宜中国林业科学研究院林业研究所国家林业局林木培育重点实验室北京100091 河南农业大学林学园艺学院河南郑州450002 湖北宜昌市林业科学研究所湖北宜昌443111

使用对树木快速无损的检测仪器——Pilodyn，研究了日本落叶松9个家系间活立木材性的遗传差异，室内测定了整株木材基本密度（Db）和木材外侧基本密度（D0），对Pilodyn测定结果与木材密度作了统计分析。结果表明：日本落叶松9个家系的P... 详细信息

使用对树木快速无损的检测仪器——Pilodyn，研究了日本落叶松9个家系间活立木材性的遗传差异，室内测定了整株木材基本密度（Db）和木材外侧基本密度（D0），对Pilodyn测定结果与木材密度作了统计分析。结果表明：日本落叶松9个家系的Pilodyn探测值（Pn）、外侧木材基本密度（Do）和整株木材基本密度（Db）都是34号家系最大和32号家系最小。9个家系的平均值按照尸h升序，Do和Db降序的方法分别进行排序，得到的排列次序基本一致。通过3个指标对9个家系进行方差分析的结果表明，Pn、Do和Db在日本落叶松9个家系间都存在极显著遗传变异（P=0．0003～0．0028）。对日本落叶松3个指标砌、D0和D6的表型相关和遗传相关分析表明，Pn与伪呈极显著的负相关（-0．6918、-0．8142）；Pn与D6也呈极显著的负相关关系（-0．6706、-0．9093）。Pn、Do和珊的家系平均遗传力分别为0．45、0．46和0．43；Pn、Do和Db的单株遗传力分别为0．28、0．33、0．26。使用h进行方差分析和遗传参数计算的结果与使用肼或D0进行各种计算的结果基本一致，因此，在日本落叶松上使用Pilodyn探测值（Ph）代替外侧木材基本密度（Do）和整株木材基本密度（Db）进行木材密度的统计分析和遗传参数的计算是可行并可靠的。

关键词：日本落叶松 Pilodyn 木材基本密度相关关系材性育种

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Area Operators on Bergman Spaces

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Acta Mathematica Sinica,English Series 2024年第5期40卷 1161-1176页

作者： Xiao Fen LV Jordi PAU Mao Fa wang Department of Mathematics Huzhou UniversityHuzhou 313000P.R.China Departament de Matemàtiques i Informàtica Universitat de Barcelona08007 BarcelonaCataloniaSpain School of Mathematics and Statistics Wuhan UniversityWuhan 430072P.R.China

We completely characterize the boundedness of area operators from the Bergman spaces A_(α)^(p)(Bn)to the Lebesgue spaces L^(q)(S_(n))for all 0 详细信息

We completely characterize the boundedness of area operators from the Bergman spaces A_(α)^(p)(Bn)to the Lebesgue spaces L^(q)(S_(n))for all 0

关键词： Area operator Bergman space tent space area formula

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Causal Analysis Between Rice Growth and Cadmium Accumulation and Transfer under Arbuscular Mycorrhizal Inoculation

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Rice science 2024年第2期31卷 226-236页

作者： ZHAO Ting wang Li YANG Jixian MA Fang State Key Laboratory of Urban Water Resource and Environment School of EnvironmentHarbin Institute of TechnologyHarbin 150090China

Cadmium(Cd)contamination in rice has been a serious threat to human *** investigate the effects of arbuscular mycorrhizal fungi(AMF)on the Cd translocation in rice,a controlled pot experiment was *** results indicated that AMF significantly increased rice biomass,with an increase of up to 40.0%,particularly in root biomass by up to 68.4%.Notably,the number of prominent rice individuals also increased,and their plasticity was enhanced following AMF *** led to an increase in the net photosynthetic rate and antioxidant enzyme activity of *** the AMF treatment group,the Cd concentration in the rice roots was significantly higher(19.1%‒68.0%)compared with that in the control ***,the Cd concentration in the rice seeds was lower in the AMF treatment group,indicating that AMF facilitated the sequestration of Cd in rice roots and reduced Cd accumulation in the *** coefficients varied across different treatments,suggesting that AMF inoculation reduced the direct impact of soil Cd concentration on the total Cd accumulation in *** translocation of Cd was consistently associated with simultaneous growth dilution and compensatory accumulation as a result of mycorrhizal *** study quantitatively analyzed this process through path analysis and clarified the causal relationship between rice growth and Cd transfer under the influence of AMF.

关键词： cadmium transfer dilution effect heavy metal immobilization mycorrhizal effect path analysis phenotypic plasticity

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Compare clinical efficacy and safety of neoadjuvant therapy and neoadjuvant chemoradiotherapy for locally advanced rectal cancer: Meta-analysis

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World Journal of Gastrointestinal Surgery 2024年第6期16卷 1845-1856页

作者： Ying wang Yan Yang Qi-Qi Liu Shao-Zhao wang Department of Anus Intestinal Surgery Feicheng People’s HospitalFeicheng 271600Shandong ProvinceChina Department of Gastroenterology Qingdao Hospital of University of Health and Rehabilitation Sciences(Qingdao Municipal Hospital)Qingdao 266011Shandong ProvinceChina Department of Gastrointestinal Surgery Peking University Shenzhen HospitalShenzhen 518036Guangdong ProvinceChina Department of Anorectal Words Central Hospital Affiliated Shandong First Medical UniversityJinan 250013Shandong ProvinceChina

BACKGROUND To compare the efficacy and safety of total neoadjuvant therapy(TNT)and neoadjuvant chemoradiotherapy(nCRT)in the treatment of middle and low locally advanced rectal *** study will systematically collect and integrate studies to evaluate the ability of these two treatments to improve tumor shrinkage rates,surgical resection rates,tumor-free survival,and severe adverse *** To provide clinicians and patients with more reliable treatment options to optimize treatment outcomes and quality of life for patients with locally advanced rectal cancer by comparing the advantages and disadvantages of the two treatment *** A full search of all clinical studies on the effectiveness and safety of TNT and nCRT for treating locally advanced rectal cancer identified in Chinese(CNKI,Wanfang,China Biomedical Literature Database)and English(PubMed,Embase)databases was *** system assessors independently screened the studies according to the inclusion and exclusion *** evaluation and RESULTS Finally,14 studies were included,six of which were randomized controlled studies.A total of 3797 patients were included,including 1865 in the TNT group and 1932 in the nCRT *** two sets of baseline data were *** results of the meta-analysis showed that the pCR rate[odds ratio(OR)=1.57,95%confidence interval(CI):1.30-1.90,P<0.00001],T stage degradation rate(OR=2.16,95%CI:1.63-2.57,P<0.00001),and R0 resection rate(OR=1.42,95%CI:1.09-1.85,P=0.009)were significantly greater in the nCRT group than in the nCRT *** was no significant difference in the incidence of grade 3/4 acute toxicity or perioperative complications between the two *** 5-year OS[hazard ratio(HR)=0.84,95%CI:0.69-1.02,P=0.08]and DFS(HR=0.94,95%CI:0.03-1.39,P=0.74)of the TNT group were similar to those of the nCRT *** TNT has greater clinical efficacy and safety than nCRT in the treatment of locally advanced rectal cancer.

关键词： Neoadjuvant therapy Neoadjuvant chemoradiotherapy Advanced rectal cancer Clinical efficacy Meta-analysis

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