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Neural Regeneration Research 2024年第8期19卷 1759-1767页

作者： zihang Zhou Yalong Yan Heng Gu Ruiao Sun zihan liao Ke Xue Chuanxi Tang Department of Neurobiology Xuzhou Key Laboratory of NeurobiologyXuzhou Medical UniversityXuzhouJiangsu ProvinceChina

Parkinson’s disease can affect not only motor functions but also cognitive abilities,leading to cognitive *** common issue in Parkinson’s disease with cognitive dysfunction is the difficulty in executive *** functions help us plan,organize,and control our actions based on our *** brain area responsible for executive functions is called the prefrontal co *** acts as the command center for the brain,especially when it comes to regulating executive *** role of the prefrontal cortex in cognitive processes is influenced by a chemical messenger called ***,little is known about how dopamine affects the cognitive functions of patients with Parkinson’s *** this article,the authors review the latest research on this *** start by looking at how the dopaminergic syste m,is alte red in Parkinson’s disease with executive ***,they explore how these changes in dopamine impact the synaptic structure,electrical activity,and connection components of the prefrontal *** authors also summarize the relationship between Parkinson’s disease and dopamine-related cognitive *** information may offer valuable insights and directions for further research and improvement in the clinical treatment of cognitive impairment in Parkinson’s disease.

关键词： dopamine dopamine receptor dopamine transporter executive dysfunction neural network neural oscillation prefrontal cortex synaptic plasticity

Analyses of N‑Terminal Pro‑Brain Natriuretic Peptide,Cardiac Troponin T,and Creatine Kinase MB in Pericardial Fluid in Sudden Cardiac Death Caused by Ischemic Heart Disease

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Journal of Forensic Science and Medicine 2022年第4期8卷 135-141页

作者： Zhipeng Cao Tianqi Wang Shao‑Huang Wu zihan liao Baoli Zhu Rui Zhao Department of Forensic Pathology School of Forensic MedicineChina Medical UniversityShenyangChina2Liaoning Province Key Laboratory of Forensic Bio‑Evidence SciencesShenyangChina3Center of Forensic InvestigationChina Medical UniversityShenyangChina

Background:Biochemical analyses of N‑terminal pro‑brain natriuretic peptide(NT‑proBNP),cardiac troponin T(cTnT),and creatine kinase MB(CK‑MB)have been reported to be valuable for the auxiliary diagnosis of sudden cardiac death(SCD)in previous forensic *** and Objectives:The present study aimed to evaluate the diagnostic efficiency of combined analyses of NT‑proBNP,cTnT and CK‑MB in the pericardial fluid for forensic diagnosis of SCD caused by ischemic heart *** and Methods:Levels of NT‑proBNP,cTnT,and CK‑MB in the pericardial fluid of 132 medicolegal autopsy cases were obtained through electrochemiluminescence ***:NT‑proBNP,cTnT,and CK‑MB levels were significantly elevated in SCD cases(P<0.05).Receiver‑operating characteristics(ROC)analysis showed that NT‑proBNP,cTnT,and CK‑MB have diagnostic value for the diagnosis of SCD:NT‑proBNP,cutoff value of 2236 pg/ml;cTnT,cutoff value of 199.51 ng/ml;CK‑MB:cutoff value of 2742.5 ng/ml,and the combined analyses of these three biomarkers have better diagnostic efficiency than each single biomarker ***,the causes of SCD were sub‑divided into acute ischemic heart disease,acute myocardial infarction(AMI),and recurrent myocardial infarction subgroups for further analysis,which revealed that the ratio of cTnT/CK‑MB could be used to distinguish AMI with the cutoff value of 0.1085 estimated by ROC ***:These observations suggested that the postmortem biochemical analyses of NT‑proBNP,cTnT,and CK‑MB in the pericardial fluid may assist to diagnose SCD in forensic practice,and the combined analyses of multiple biomarkers have better diagnostic efficiency than each single biomarker *** the basis of the postmortem biochemical analyses of NT‑proBNP,cTnT and CK‑MB,combining the ratio of cTnT/CK‑MB could be used to distinguish AMI.

关键词： Cardiac troponin T creatine kinase MB ischemic heart disease N‑terminal pro‑brain natriuretic peptide pericardial fluid postmortem biochemistry sudden cardiac death

Enhanced recovery of high-purity Fe powder from iron-rich electrolytic manganese residue by slurry electrolysis

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International Journal of Minerals,Metallurgy and Materials 2024年第3期31卷 531-538页

作者： Wenxing Cao Jiancheng Shu Jiaming Chen zihan Li Songshan Zhou Shushu liao Mengjun Chen Yong Yang Key Laboratory of Solid Waste Treatment and Resource Recycle(SWUST) Ministry of EducationSouthwest University of Science and TechnologyMianyang 621010China School of Chemistry and Chemical Engineering Chongqing UniversityChongqing 400044China Daxin Manganese Mining Branch of South Manganese Group Limited Chongzuo 532315China

Iron-rich electrolytic manganese residue(IREMR)is an industrial waste produced during the processing of electrolytic metal manganese,and it contains certain amounts of Fe and Mn resources and other heavy *** this study,the slurry electrolysis technique was used to recover high-purity Fe powder from *** effects of IREMR and H2SO4 mass ratio,current density,reaction temper-ature,and electrolytic time on the leaching and current efficiencies of Fe were *** to the results,high-purity Fe powder can be recovered from the cathode plate,and the slurry electrolyte can be *** leaching efficiency,current efficiency,and purity of Fe reached 92.58%,80.65%,and 98.72wt%,respectively,at a 1:2.5 mass ratio of H2SO4 and IREMR,reaction temperature of 60℃,electric current density of 30 mA/cm^(2),and reaction time of 8 *** addition,vibrating sample magnetometer(VSM)analysis showed that the coercivity of electrolytic iron powder was 54.5 A/m,which reached the advanced magnetic grade of electrical pure-iron powder(DT4A coercivity standard).The slurry electrolytic method provides fundamental support for the industrial application of Fe resource recovery in IRMER.

关键词： iron-rich electrolytic manganese residue slurry electrolysis high-purity iron powder leaching efficiency current efficiency

基于磁场检测的干式空心电抗器匝间短路故障诊断方法

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实验科学与技术 2024年第1期22卷 30-36页

作者：李威王智弘廖子涵刘卫东符劲松张进赵彦珍国网湖南超高压变电公司长沙410009 变电智能运检国网湖南省电力有限公司实验室长沙410009 西安交通大学电气工程学院西安710049

匝间短路故障是干式空心电抗器最常见的故障,严重时会引起电抗器绝缘损坏、起火,甚至烧毁。及早诊断电抗器匝间短路故障,发出有效预警对电力系统安全运行具有重要意义。该文提出一种基于磁场检测的干式空心电抗器匝间短路故障诊断方法:... 详细信息

匝间短路故障是干式空心电抗器最常见的故障,严重时会引起电抗器绝缘损坏、起火,甚至烧毁。及早诊断电抗器匝间短路故障,发出有效预警对电力系统安全运行具有重要意义。该文提出一种基于磁场检测的干式空心电抗器匝间短路故障诊断方法:独立于电抗器本体,上下安装与电抗器绕组同轴的检测线圈,通过检测线圈感应电压的变化,采用基于数理统计的准确识别匝间短路过程的3σ判据模型和算法,判断电抗器匝间短路故障并进行预警和报警。基于有限元数值计算软件,以一台型号为BKGKL-20000-35干式空心电抗器为研究对象,仿真分析了电抗器在不同位置发生匝间短路故障时检测线圈的感应电压变化规律,验证所提出方法的有效性。最后通过对试制样机的现场试验,验证了该方法实用可靠,可推广应用于实际电力系统中。

关键词：干式空心电抗器匝间短路磁场检测法故障诊断

Efficient desorption and reuse of collector from the flotation concentrate:A case study of scheelite

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International Journal of Minerals,Metallurgy and Materials 2024年第11期 2435-2444页

作者： Liming Tao Jianjun Wang Dejin liao Wenkai Jia zihan Zhao Wenfang Che Zhongxu Qi Wei Sun Zhiyong Gao School of Minerals Processing and Bioengineering Key Laboratory of Hunan Province for Clean and Efficient Utilization of Strategic Calcium-containing Mineral Resources Engineering Research Center of Ministry of Education for Carbon Emission Reduction in Metal Resource Exploitation and Utilization Central South University State Key Laboratory of Mineral Processing BGRIMM Technology Group Mining Technology Research Center China Tungsten and Hightech Materials Co. Ltd. Luoyang Luanchuan molybdenum Group Co. Ltd. Changsha Institute of Mining Research Co. Ltd.

Flotation is the most common method to obtain concentrate through the selective adsorption of collectors on target minerals to make them hydrophobic and floatable. In the hydrometallurgy of concentrate, collectors adsorbed on concentrate can damage ion-exchange resin and increase the chemical oxygen demand(COD) value of wastewater. In this work, we proposed a new scheme, i.e., desorbing the collectors from concentrate in ore dressing plant and reusing them in flotation flowsheet. Lead nitrate and benzohydroxamic acid(Pb-BHA) complex is a common collector in scheelite flotation. In this study, different physical(stirring or ultrasonic waves) and chemical(strong acid or alkali environment) methods for facilitating the desorption of Pb-BHA collector from scheelite concentrate were explored. Single-mineral desorption tests showed that under the condition of pulp p H 13 and ultrasonic treatment for 15 min, the highest desorption rates of Pb and BHA from the scheelite concentrate were 90.48% and 63.75%, respectively. Run-of-mine ore flotation tests revealed that the reuse of desorbed Pb and BHA reduced the collector dosage by 30% for BHA and 25% for Pb. The strong alkali environment broke the chemical bonds between Pb and BHA. The cavitation effect of ultrasonic waves effectively reduced the interaction intensity between Pb-BHA collector and scheelite surfaces. This method combining ultrasonic waves and strong alkali environment can effectively desorb the collectors from concentrate and provide “clean” scheelite concentrate for metallurgic plants; the reuse of desorbed collector in flotation flowsheet can reduce reagent cost for ore dressing plants.

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X70钢及其焊缝在Na_2CO_3+NaHCO_3溶液中电化学腐蚀行为研究

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中国腐蚀与防护学报 2018年第2期38卷 158-166页

作者：廖梓含宋博任泽何川陈旭辽宁石油化工大学石油天然气工程学院抚顺113001

采用动电位极化、电化学阻抗谱和Mott-Schottky方法研究了溶液浓度和Cl^-对X70钢母材及其焊缝在Na_2CO_3+NaHCO_3溶液中电化学腐蚀行为影响。结果表明,X70钢母材和焊缝在0.1~1.0 mol/L(Na_2CO_3+NaHCO_3)溶液中都能形成稳定的钝化区间... 详细信息

采用动电位极化、电化学阻抗谱和Mott-Schottky方法研究了溶液浓度和Cl^-对X70钢母材及其焊缝在Na_2CO_3+NaHCO_3溶液中电化学腐蚀行为影响。结果表明,X70钢母材和焊缝在0.1~1.0 mol/L(Na_2CO_3+NaHCO_3)溶液中都能形成稳定的钝化区间。随着溶液浓度的增大,钝化膜的稳定性增加。X70管线钢母材和焊缝的钝化膜均呈现出n型半导体特征,且施主密度与维钝电流密度的变化趋势相同。Cl^-在1.0 mol/L(Na_2CO_3+NaHCO_3)溶液中,对焊缝组织的吸附现象存在显著特征,主要吸附于氧空位处。

关键词： X70管线钢溶液浓度钝化膜焊缝缺陷密度

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拉索模态参数全过程自动化识别方法

土木工程学报 2023年第7期56卷 82-91页

作者：安永辉薛志林廖子涵李宾宾大连理工大学辽宁大连116023 浙江大学浙江海宁314400

模态参数广泛应用于拉索索力识别与状态评估,其自动化识别是拉索实时健康监测的关键技术之一。贝叶斯FFT算法和深度神经网络可实现拉索模态参数识别的自动化和不确定性分析,其中,贝叶斯FFT算法可快速识别拉索模态参数且定量其不确定性,... 详细信息

模态参数广泛应用于拉索索力识别与状态评估,其自动化识别是拉索实时健康监测的关键技术之一。贝叶斯FFT算法和深度神经网络可实现拉索模态参数识别的自动化和不确定性分析,其中,贝叶斯FFT算法可快速识别拉索模态参数且定量其不确定性,但需人工输入结构自振频带信息。为此,基于Retinanet模型和一维卷积神经网络,设计提出一种轻量化频带选择网络,使之能自动检测拉索的振动频带,进而提出一种拉索模态参数全过程自动化识别方法。提出的频带选择网络模拟人工频带选择过程,融合多频率分辨率下功率谱曲线估计信息,通过检测功率谱曲线峰值确定拉索振动频带。为验证所提算法的有效性,利用沪苏通长江大桥拉索施工阶段实测加速度数据构建训练集和测试集,完成拉索模态参数的连续自动识别。试验证明,频带自动选择网络准确性超过95%,单样本平均推理时间达到毫秒级,与贝叶斯FFT相结合可实现拉索模态参数的自动化实时识别。另外,通过拉索频率的连续识别成功检测到拉索张拉事件,验证了基于频率对拉索损伤识别的潜在可能性。

关键词：拉索模态识别贝叶斯FFT 深度神经网络

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铁细菌对L245钢腐蚀行为的影响研究

中国腐蚀与防护学报 2021年第2期41卷 248-254页

作者：王坤泰陈馥李环罗米娜贺杰廖子涵西南石油大学化学化工学院成都610500

采用挂片、电化学实验和SEM等手段研究了L245钢在含有铁细菌(FB)的页岩气压裂产出水中的腐蚀行为。结果表明:有、无FB压裂产出水都会对L245钢造成腐蚀,但失重分析和极化曲线分析都证明FB的存在促进了L245钢的腐蚀;电化学阻抗拟合结果表... 详细信息

采用挂片、电化学实验和SEM等手段研究了L245钢在含有铁细菌(FB)的页岩气压裂产出水中的腐蚀行为。结果表明:有、无FB压裂产出水都会对L245钢造成腐蚀,但失重分析和极化曲线分析都证明FB的存在促进了L245钢的腐蚀;电化学阻抗拟合结果表明,在不含FB的页岩气压裂产出水中,L245钢的腐蚀速率在前5 d逐渐增大,后快速减小。在含有FB的页岩气压裂产出水中,L245钢的腐蚀速率先减小,至8 d后逐渐增大。SEM分析结果表明,两种体系生成了不同的腐蚀产物膜。

关键词： L245钢铁细菌电化学微生物腐蚀页岩气压裂产出水

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水包水乳液减阻剂的减阻机理研究

石油化工 2019年第7期48卷 724-730页

作者：廖子涵陈馥卜涛王婉露吴红军西南石油大学化学化工学院四川成都610500 中国石油塔里木油田分公司油气工程研究院新疆库尔勒841000

将采用分散聚合法制备的水包水乳液减阻剂直接溶解于纯水中,配制成滑溜水;通过环境扫描电子显微镜与室内管道摩阻仪对减阻剂进行微观结构表征与减阻性能测试。实验结果表明,该减阻剂具有良好的速溶性,能在 98 s 内溶解完全;减阻剂浓度... 详细信息

将采用分散聚合法制备的水包水乳液减阻剂直接溶解于纯水中,配制成滑溜水;通过环境扫描电子显微镜与室内管道摩阻仪对减阻剂进行微观结构表征与减阻性能测试。实验结果表明,该减阻剂具有良好的速溶性,能在 98 s 内溶解完全;减阻剂浓度和高价离子浓度影响滑溜水的减阻性能,其中,Ca^2+,Fe^3+,SO4^2-质量浓度分别超过 75,20,100 g/L 时,才会影响减阻效率;在滑溜水实际应用时应侧重非结构黏度的减阻作用。

关键词：水包水乳液减阻剂滑溜水结构黏度减阻率减阻机理

基于ARGET ATRP原理控制就地聚合体系成胶时间

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油田化学 2020年第1期37卷 22-28页

作者：邵明鲁岳湘安贺杰李环廖子涵王励琪油气资源与探测国家重点实验室石油工程教育部重点实验室中国石油大学北京102249 西南石油大学化学化工学院四川省油气田应用化学重点实验室四川成都610500 College of Earth Sciences University of Aberdeen King’s CollegeUK AB243FX

针对传统自由基聚合引发方式在油藏中控制就地聚合成胶时间难以实现的问题,提出了以电子转移活化再生催化剂原子转移自由基聚合(ARGET ATRP)引发体系代替传统引发剂,优选了络合还原剂,考察了ARGET ATRP引发体系中引发剂1,2-二溴乙烷,催... 详细信息

针对传统自由基聚合引发方式在油藏中控制就地聚合成胶时间难以实现的问题,提出了以电子转移活化再生催化剂原子转移自由基聚合(ARGET ATRP)引发体系代替传统引发剂,优选了络合还原剂,考察了ARGET ATRP引发体系中引发剂1,2-二溴乙烷,催化剂三氯化铁,络合还原剂维生素C各组分加量对成胶时间的影响,采用优选的ARGET ATRP引发体系评价就地聚合调剖体系在岩心中的注入性和封堵性。研究结果表明,在80℃条件下,当1,2-二溴乙烷加量为0.35%数0.4%、引发剂加量为0.012%数0.02%、络合还原剂维生素C加量为0.18%数0.26%时,可调节各组分加量使就地聚合体系成胶时间大于24 h,成胶强度达I级;当矿化度低于7000 mg/L时,成胶时间随矿化度增大而延长,而凝胶强度由I级降至E级。岩心评价实验表明就地聚合体系具有良好的注入性,ARGET ATRP引发体系可以在岩心中引发聚合单体交联成胶,成胶后对岩心的整体封堵率达到77.71%。因此,基于ARGETATRP原理对就地聚合体系在油藏中的成胶时间调控具有可行性。

关键词：低渗油藏深部调剖就地聚合成胶时间 ARGETATRP引发体系