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聚丙烯酸钠改性红黏土工程特性试验研究

水文地质工程地质 2024年第3期51卷 110-117页

作者：王家全刘宏志林志南唐毅广西科技大学广西高校防灾减灾与预应力技术重点实验室广西柳州545006 广西壮族自治区岩土灾变与生态治理工程研究中心广西柳州545006

为研究聚丙烯酸钠改性红黏土的工程特性,利用聚丙烯酸钠对柳州重塑红黏土进行固化处理,开展变水头渗透试验和三轴剪切试验,分析改性红黏土的渗透特性和力学性能,确定聚丙烯酸钠的最适掺量,并通过对最适改性土开展崩解试验和扫描电镜试验... 详细信息

为研究聚丙烯酸钠改性红黏土的工程特性,利用聚丙烯酸钠对柳州重塑红黏土进行固化处理,开展变水头渗透试验和三轴剪切试验,分析改性红黏土的渗透特性和力学性能,确定聚丙烯酸钠的最适掺量,并通过对最适改性土开展崩解试验和扫描电镜试验,确定改性红黏土的抗崩解性能,揭示聚丙烯酸钠改性红黏土的微观作用机理。结果表明:随聚丙烯酸钠掺量的增加,改性土的渗透系数呈现逐步下降的趋势,并在达到3%后逐渐趋于稳定,此时渗透系数为8.1379×10^(-7)cm/s,相对素红黏土降低了90.78%;而改性红黏土的抗剪强度呈现先增大后减小的趋势,并在2%时达到峰值,相对素红黏土提高了394.21%。综上确定聚丙烯酸钠的最适掺量为3%,此掺量下改性土的抗崩解性能提高了42.86%,土颗粒间的孔隙被聚合物链所填充,碎散的颗粒状红黏土变为连续状,排列结构与致密程度均优于素红黏土。经聚丙烯酸钠改性后,红黏土的防渗性能、力学性能与抗崩解性均存在明显提高,可以为实际工程提供理论指导。

关键词：聚丙烯酸钠红黏土渗透性抗剪强度抗崩解性微观机理

劳动法视野下我国劳动者犯罪记录披露问题探析

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贵州开放大学学报 2024年第2期32卷 55-60页

作者：李爱民王家全贵州职业技术学院贵阳550023

犯罪记录是国家专门机关对犯罪人员情况的客观记载,犯罪记录的披露会导致拥有特定犯罪记录的劳动者受到求职、就业歧视,从而损害其公平就业权。合理的平衡劳动者、用人单位以及社会公共利益之间在劳动者犯罪记录披露上的要求,是该披露... 详细信息

犯罪记录是国家专门机关对犯罪人员情况的客观记载,犯罪记录的披露会导致拥有特定犯罪记录的劳动者受到求职、就业歧视,从而损害其公平就业权。合理的平衡劳动者、用人单位以及社会公共利益之间在劳动者犯罪记录披露上的要求,是该披露规则运作的目的。文章对我国劳动者犯罪记录披露规则的不足与改进进行探讨,期望对我国劳动领域的犯罪记录披露规则的完善有所裨益。

关键词：劳动者犯罪记录从业禁止披露

相对密实度和固结应力比对北部湾海砂动力特性影响的试验研究

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安全与环境工程 2024年第4期31卷 20-28页

作者：王家全和玉祝梦柯钱弘毅广西科技大学广西高校防灾减灾与预应力技术重点实验室广西柳州545006 广西壮族自治区岩土灾变与生态治理工程研究中心广西柳州545006

北部湾地区拥有丰富的海洋资源,海洋工程在这一地区的发展日益重要,了解海砂在不同固结应力比和密实度条件下的动力特性,对于海岸线保护、港口建设、堤防工程等都至关重要。为探究北部湾海砂的动力特性,针对北部湾海砂开展了一系列的固... 详细信息

北部湾地区拥有丰富的海洋资源,海洋工程在这一地区的发展日益重要,了解海砂在不同固结应力比和密实度条件下的动力特性,对于海岸线保护、港口建设、堤防工程等都至关重要。为探究北部湾海砂的动力特性,针对北部湾海砂开展了一系列的固结不排水循环动三轴试验,分析了相对密实度和固结应力比对北部湾海砂的轴向累积应变、动弹性模量、动孔压以及滞回曲线的影响。研究表明:在相同振次水平下,随着固结应力比和相对密实度的增大,海砂的轴向累积应变随之减小;动孔压随着固结应力比的增大线性减小,在低相对密实度(Dr≤50%)下,动孔压随振次的增大而增大,在高相对密实度(Dr=70%)下,动孔压随振次先增后减;动弹性模量随着振次的增加出现刚度软化现象,增大相对密实度与固结应力比,较明显地减缓了动弹性模量的衰减速率;随着固结应力比和相对密实度的增大,滞回曲线包围的面积减小,滞回曲线由不封闭曲线转为封闭曲线。这些研究成果可以为北部湾围填海工程提供一定的参考。

关键词：北部湾海砂相对密实度固结应力比滞回曲线动三轴试验

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格栅加筋处治沿海高速公路拓宽路堤数值分析

广西大学学报（自然科学版） 2024年第2期49卷 249-258页

作者：骆俊晖祁航翔王家全畅振超吴勇广西北投交通养护科技集团有限公司广西南宁530029 广西科技大学广西高校防灾减灾与预应力技术重点实验室广西柳州545006 广西壮族自治区岩土灾变与生态治理工程研究中心广西柳州545006 广西交通设计集团有限公司广西南宁530029

为了研究沿海高速公路路堤拓宽差异沉降关键影响因素,采用有限差分软件FLAC^(3D)建模分析,探讨土工格栅加筋参数(格栅层数与格栅弹性模量)、新路堤填土参数(土体重度与土体弹性模量)对拓宽路堤差异沉降的影响,并提出了路堤拓宽最优设计... 详细信息

为了研究沿海高速公路路堤拓宽差异沉降关键影响因素,采用有限差分软件FLAC^(3D)建模分析,探讨土工格栅加筋参数(格栅层数与格栅弹性模量)、新路堤填土参数(土体重度与土体弹性模量)对拓宽路堤差异沉降的影响,并提出了路堤拓宽最优设计方案。结果表明:土工格栅加筋参数对路堤差异沉降改善作用较小,而新旧路堤差异沉降随着路堤填土重度的增大而增大,且随着路堤填土弹性模量的增大而减小;最后,通过对影响拓宽路堤差异沉降的关键影响因素和拓宽路堤最大剪应变增量进行分析,建议在实际改扩建路堤加宽过程中选择轻质高强的路堤填料,以此来改善路堤拓宽差异沉降的影响。

关键词：路堤拓宽差异沉降 FLAC^(3D) 土工格栅

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高中低拉拔速率下筋土界面拉拔试验分析

工业建筑 2024年第4期54卷 142-148页

作者：王家全王梦莲唐毅祁航翔广西科技大学土木建筑工程学院广西壮族自治区岩土灾变与生态治理工程研究中心广西柳州545006

边坡及挡墙倒塌破坏会导致土工格栅与土之间快速滑动,筋土界面相互作用较为复杂。通过对不同拉拔速率下界面筋材受力和变形特性的研究,有助于加深对筋-土界面工作特性的认识。基于此,采用拉拔试验以拉拔速率和法向荷载为研究因素探讨了... 详细信息

边坡及挡墙倒塌破坏会导致土工格栅与土之间快速滑动,筋土界面相互作用较为复杂。通过对不同拉拔速率下界面筋材受力和变形特性的研究,有助于加深对筋-土界面工作特性的认识。基于此,采用拉拔试验以拉拔速率和法向荷载为研究因素探讨了9种拉拔速率和3种法向荷载对筋-土界面作用特性的影响规律。结果表明:峰值拉拔力随着拉拔速率由低到高变化增大幅度逐渐变缓,界面黏聚力与拉拔速率呈正相关变化趋势,最大增大了278%;界面摩擦角呈负相关变化趋势,最大减小了19.1%。格栅应变在低速时受拉拔速率影响较大,随着拉拔速率的增大而增大;当拉拔速率超过5 mm/min时,格栅应变变化幅度减小,抗拔刚度增大。界面剪胀量随拉拔速率的增大呈增大趋势,随法向荷载的增大呈减小趋势。高速时界面剪胀量约为低速时的1.56倍、中速时的1.13倍。

关键词：土工格栅拉拔速率界面作用拉拔试验

Hydrogen-bond-assisted transition-metal-free catalytic transformation of amides to esters

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Science China Chemistry 2021年第1期64卷 66-71页

作者： Changyu Huang Jinpeng Li jiaquan wang Qingshu Zheng Zhenhua Li Tao Tu Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials Department of ChemistryFudan UniversityShanghai 200438China State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic ChemistryChinese Academy of SciencesShanghai 200032China Green Catalysis Center and College of Chemistry Zhengzhou UniversityZhengzhou 450001China

The amide C-N cleavage has drawn a broad interest in synthetic chemistry,biological process and pharmaceutical ***-metal,luxury ligand or excess base were always vital to the ***,we developed a transition-metalfree hydrogen-bond-assisted esterification of amides with only catalytic amount of *** proposed crucial role of hydrogen bonding for assisting esterification was control experiments,density functional theory(DFT)calculations and kinetic *** broad substrate scopes and excellent functional groups tolerance,this base-catalyzed protocol complements the conventional transition-metal-catalyzed esterification of amides and provides a new pathway to catalytic cleavage of amide C–N bonds for organic synthesis and pharmaceutical industry.

关键词： amides C–N bond cleavage esterification hydrogen bonding transition-metal-free catalysis

Effect of ultraviolet blood irradiation and oxygenation on nerve function and function of the red blood cell membrane pump in patients with acute cerebral infarction

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Neural Regeneration Research 2006年第1期1卷 60-63页

作者： jiaquan wang Chun Mao Kaifu Ma Shiqing wang Department of Neurology Xiangfan Central Hospital Xiangfan 441021 Hubei Province China

BACKGROUND： Ultraviolet blood irradiation and oxygenation （UBIO） has obtained better clinical effect in treating acute cerebral infarction, but the mechanism underlying this effect remains unclear. OBJECTIVE： To observe the effect of UBIO on the nerve function and activities of K^＋-Na^＋-ATPase and Ca2^＋-Mg2^＋-ATPase activities on the red blood cell （RBC） membrane of patients with acute cerebral infarction. DESIGN： A randomized and controlled study.SETTING： Department of Neurology, Xiangfan Central Hospital.PARTICIPANTS： From January 2000 to December 2001, excluding those above 70 years old, 58 cases of 700 patients with acute cerebral infarction admitted in the Department of Neurology, Xiangfan Central Hospital, were recruited and divided into two groups according to the random number table： UBIO treated group （n=28）, including 17 males and 11 females, aged 40-68 years; and control group （n=30）, including 20 males and 10 females, aged 44-69 years. All the patients agreed to participate in the therapeutic program and detected items. The general informations were comparable without obvious differences between the two groups （P 〉 0.05）.METHODS： ① The patients in both groups received routine treatments, besides, those in the UBIO treated group were given UBIO treatment by using the XL-200 type therapeutic apparatus produced in Shijiazhuang, whose ultraviolet wave was set at 253.7 nm with the energy density of 0.568 J/m^2 per second, UBIO treatment started from the second day after admission, once every other day, with a single course consisting of 5-7 treatments. ② In the UBIO treated group, the venous blood was sampled before and after the first, third and the completion of the treatment course respectively, the venous blood was taken at each corresponding time point in the control group. After centrifugation of the blood at 10 000 rounds per minute, the RBC membrane was separated and then the activities of K^＋-Na^＋-ATPase and Ca2^＋-Mg2^＋-ATPase were detected

关键词： Effect of ultraviolet blood irradiation and oxygenation on nerve function and function of the red blood cell membrane pump in patients with acute cerebral infarction BIO ATPase cell

Battle against AIDS:Engaging Every Official in the Cause

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The Journal of Human Rights 2008年第2期7卷 27-28页

作者： wang jiaquan

An AIDS control campaign spon sored by a Sino-British project in mid October made Pan ,Congbin, an official in north-west China＇s G-ansu Province, determined to carry it on and constantly raise his community＇s awar... 详细信息

关键词： AIDS 月七 Battle against AIDS

Degradation and mineralization of ciprofloxacin by gas–liquid discharge non-thermal plasma

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Plasma Science and Technology 2019年第1期21卷 52-62页

作者： Shuheng HU Xinghao LIU Zimu XU jiaquan wang Yunxia LI Jie SHEN Yan LAN Cheng CHENG School of Resources and Environmental Engineering Hefei University of Technology Intelligent Manufacturing Technology Research Institute Hefei University of Technology Institute of Plasma Physics Chinese Academy of Sciences Center of Medical Physics and Technology Hefei Institutes of Physical Science Chinese Academy of Sciences Anhui Province Key Laboratory of Medical Physics and Technology Hefei Institutes of Physical ScienceChinese Academy of Sciences

A typical quinolones antibiotic ciprofloxacin(CIP) in aqueous solution was degraded by a gas–liquid discharge non-thermal plasma system. The discharge plasma power and the emission intensity of the excited reactive species(RS) generated in the gas phase were detected by the oscilloscope and the optical emission spectroscopy. The effects of various parameters on CIP degradation, i.e. input powers, initial concentrations addition of radical scavengers and p H values were investigated. With the increase of discharge power, the degradation efficiency increased but the energy efficiency significantly reduced. The degradation efficiency also reduced under high concentration of initial CIP conditions due to the competitive reactions between the plasma-induced RS with the degradation intermediates of CIP. Different radical scavengers(isopropanol and CCl_4) on ·OH and H· were added into the reaction system and the oxidation effects of ·OH radicals have been proved with high degradation capacity on ***, the long-term degradation effect on CIP in the plasma-treated aqueous solution proved that the long-lived RS(H_2O_2 and O_3, etc) might play key roles on the stay effect through multiple aqueous reactions leading to production of ·OH. The degradation intermediates were determined by the method of electrospray ionization(+)-mass spectroscopy, and the possible degradation mechanism were presented.

关键词： gas-liquid plasma ciprofloxacin mineralization degradation mechanism