检索结果-南通市图书馆

基于深度学习的烟气温度和CO_(2)浓度在线检测

在线全文

学校读者我要写书评

暂无评论

洁净煤技术 2024年第8期30卷 50-57页

作者：周颖娄春马晓春华中科技大学能源与动力工程学院煤燃烧国家重点实验室武汉430074 新疆维吾尔自治区计量测试研究院乌鲁木齐830011

基于低分辨率红外发射光谱采集技术,耦合深度学习计算方法,提出了一种烟气温度和CO_(2)浓度在线检测方法。利用气体光谱辐射模型计算训练数据,基于多层感知器(MlP)神经网络反演火焰烟气温度和CO_(2)浓度的分布,结果表明,MlP神经网络模... 详细信息

基于低分辨率红外发射光谱采集技术,耦合深度学习计算方法,提出了一种烟气温度和CO_(2)浓度在线检测方法。利用气体光谱辐射模型计算训练数据,基于多层感知器(MlP)神经网络反演火焰烟气温度和CO_(2)浓度的分布,结果表明,MlP神经网络模型对温度、CO_(2)和h_(2)O体积分数的反演误差均低于1%,预测精度均大于94.5%,具有良好的泛化能力和预测能力。建立了一套基于深度学习与发射光谱耦合的烟气温度和CO_(2)浓度在线检测装置,并对乙烯扩散火焰和C_(2)h_(4)/Nh_(3)部分预混火焰展开了研究。乙烯扩散火焰烟气温度和CO_(2)体积分数的测量结果与模拟火焰结果相一致,验证了基于深度学习与发射光谱耦合的在线检测法的可行性。改变部分预混火焰的掺氨比例,分析火焰中轴上方不同高度处气体的温度和CO_(2)浓度变化,结果表明,同一高度处的烟气温度会随着掺入氨气的增加而增大,而CO_(2)体积分数会呈先增大后急剧减少的趋势。所提出的方法可以较灵敏的检测温度和CO_(2)浓度的变化,用于多种火焰的燃烧诊断研究,在燃煤电厂碳排放在线检测上也有一定的应用前景。

关键词：燃烧火焰 CO_(2) 在线检测红外光谱分析多层感知器气体温度

维普期刊数据库博看期刊

色谱-质谱法同时测定泮托拉唑钠中3种基因毒性杂质

在线全文

学校读者我要写书评

暂无评论

中国现代应用药学 2024年第10期41卷 1381-1387页

作者：徐秀卉陈玲芳楼明波杭州康恩贝制药有限公司杭州310052 浙江康恩贝制药股份有限公司杭州310052

目的建立一种色谱-质谱法检测泮托拉唑钠中的3种基因毒性杂质。方法采用色谱-质谱法,色谱柱为十八烷基硅烷键合硅胶为填充剂[Kromasil 100-5(4.6 mm×25 cm,5μm)或效能相当的色谱柱],以乙腈-0.01 mol·l^(-1)乙酸铵(35∶65)为流动相,流... 详细信息

目的建立一种色谱-质谱法检测泮托拉唑钠中的3种基因毒性杂质。方法采用色谱-质谱法,色谱柱为十八烷基硅烷键合硅胶为填充剂[Kromasil 100-5(4.6 mm×25 cm,5μm)或效能相当的色谱柱],以乙腈-0.01 mol·l^(-1)乙酸铵(35∶65)为流动相,流速0.9 ml·min^(-1),柱温25℃;正离子检测模式,扫描范围:150~450 Da,干燥器温度350℃,干燥气流速10 l·min^(-1),雾化气压力50 psig,毛细管电压4000 V,碎裂电压175 V,锥孔电压65 V。切入质谱的时间设为0~3.5 min弃去(进入废液),3.5 min~主峰保留时间-0.5 min进入质谱检测器,主峰保留时间-0.5 min~结束再弃去(进入废液)。结果基因毒性杂质1浓度在9.04~27.13 ng·ml^(-1)内与峰面积线性关系良好(r=0.998),基因毒性杂质2浓度在8.92~26.75 ng·ml^(-1)内与峰面积线性关系良好(r=0.999),中间体Ⅱ浓度在7.78~23.34 ng·ml^(-1)内与峰面积线性关系良好(r=0.990);基因毒性杂质1的定量限为9.0430 ng·ml^(-1),检测限为0.9043 ng·ml^(-1);基因毒性杂质2的定量限为8.9174 ng·ml^(-1),检测限为2.9725 ng·ml^(-1);中间体Ⅱ的定量限为7.7792 ng·ml^(-1),检测限为0.7779 ng·ml^(-1);3种基因毒性杂质的各浓度回收率在92.3%~107.0%,RSD为2.0%~7.9%。经检测泮托拉唑钠中均未检出3种杂质。结论该方法能对泮托拉唑钠原料基因毒性杂质1、基因毒性杂质2、中间体Ⅱ3种基因毒性杂质进行准确的定量测定,方法专属性强、灵敏度高、实验操作简便、快速,可用于泮托拉唑钠中以上3种基因毒性杂质的测定。

关键词：泮托拉唑钠基因毒性杂质色谱-质谱法

腰部肌群稳定性康复训练结合肌内效贴扎技术在腰椎间盘突出症康复治疗中的应用

在线全文

学校读者我要写书评

暂无评论

中山大学学报（医学科学版） 2024年第1期45卷 152-160页

作者：楼亦文李琳陈潜宁波市鄞州区第二医院康复医学科浙江宁波315100 浙江医院康复医学科浙江杭州310000

【目的】比较腰部肌群稳定性康复训练及其结合肌内效贴扎技术在腰椎间盘突出症(lDh)康复治疗中的应用效果,以期为临床lDh康复治疗提供参考。【方法】纳入2018年1月到2020年1月宁波市鄞州区第二医院收治的99例lDh患者分为对照组(n=49)与... 详细信息

【目的】比较腰部肌群稳定性康复训练及其结合肌内效贴扎技术在腰椎间盘突出症(lDh)康复治疗中的应用效果,以期为临床lDh康复治疗提供参考。【方法】纳入2018年1月到2020年1月宁波市鄞州区第二医院收治的99例lDh患者分为对照组(n=49)与观察组(n=50)。对照组采用单独肌内效贴扎技术,观察组采用肌内效贴扎技术配合腰部肌群稳定性康复训练,比较两组患者临床治疗效果、治疗前后腰椎功能及疼痛情况、腰背伸肌群表面肌电值、腰椎功能活动情况,以及皮肤过敏的发生情况。【结果】治疗4周后,观察组视觉模拟评分(VAS)、腰痛功能障碍评价表(ODI)评分明显低于对照组(P0.05);治疗4周后,观察组复发率明显低于对照组(PlDh的临床疗效显著优于单纯肌内效贴扎,可有效改善患者肌肉疲劳程度,有助于减轻其腰椎部位疼痛并提高腰椎活动功能。

关键词：腰椎间盘突出症腰部肌群稳定性康复训练肌内效贴康复治疗

Zassenhaus lemma,Schreier Refinement Theorem,and Jordan–hölder Theorem for Gyrogroups

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

Algebra Colloquium 2024年第2期31卷 323-332页

作者： Prathomjit Khachorncharoenkul Rasimate Maungchang Teerapong Suksumran l.A.Bokut School of Science Walailak UniversityNakhon Si Thammarat 80160Thailand Department of Mathematics Faculty of ScienceChiang Mai University Chiang Mai 50200Thailand 不详

In this article,we extend the Zassenhaus lemma(also called the butterfly lemma)and the Schreier refinement theorem to the case of *** addition,we use these results to prove the Jordan–hölder theorem for gyrogroups as... 详细信息

关键词： Zassenhaus lemma Schreier refinement theoremg yrogroup subgyrogroup diagram normal subgyrogroup

Simultaneous removal of critical rare earth elements and chalcogen oxyanions by anaerobic granular sludge

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Rare Metals 2024年第9期43卷 4595-4611页

作者： Chiara Belloni Mohanakrishnan logan Stefano Papirio Piet N.l.lens University of Galway Department of Civil Architectural and Environmental EngineeringUniversity of Naples Federico II

Conventional mining of economically and strategically important critical rare earth elements(REEs)(such as neodymium, lanthanum and dysprosium), and chalcogens(such as selenium and tellurium) are associated with a huge economic and environmental cost. Therefore,the need to recover REEs as well as chalcogens from different waste streams including wastewaters is becoming urgent. Batch assays on synthetic chalcogen/REE-laden wastewater showed that the presence of REEs significantly improved the tellurite removal rate(> 80%) and enhanced selenate removal by 66% ± 10%. Three 3.9 l continuous upflow anaerobic granular sludge bed(UASB) reactors were operated at a hydraulic retention time of 24 h and30 °C. Selenate reduction was achieved with a removal efficiency of ～ 98% with an influent p h of 4.0 for more than 28 days. The effect of REEs on tellurite removal in the UASB bioreactor could not be clearly established since a soluble tellurium removal efficiency of more than 98%was observed already before the addition of REEs at elevated tellurite concentrations. The complete REE removal in both batch assays and UASB reactors at higher ph (7.0 ± 0.5) was attributed to precipitation, whereas chalcogen oxyanions removal was due to microbial reduction. however, at acidic p h, biosorption was responsible for REE's removal, and the Se-enriched sludge exhibited a superior REE's removal efficiency than the non-enriched and Te-enriched sludge.

关键词： Adsorption Bioreduction Rare earth elements Selenium Tellurium

Bithalamic Ischemic Stroke in Sickle Cell Patient at the Kamenge University hospital in Burundi: Case Report

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Open Journal of Medical Imaging 2024年第2期14卷 72-78页

作者： Sébastien Manirakiza Daniel Nduwayo Patrice Barasukana Chantal Murekatete Jean Bosco Bizimana Alice Ndayishimiye léopold Nzisabira hélène Bukuru Department of Radiology Kamenge University Hospital Center University of Burundi Bujumbura Burundi Department of Internal Medicine Neurology Kamenge University Hospital Center University of Burundi Bujumbura Burundi Department of Surgery Neurosurgery Kamenge University Hospital Center University of Burundi Bujumbura Burundi Department of Pediatrics Kamenge University Hospital Center University of Burundi Bujumbura Burundi

Aim: To describe the clinical and radiological diagnostic for a sickle cell patient who got a bithalamic vasculature accident. Observation: This was a 4-year-old female child admitted to the pediatric ward for convulsive seizures in a feverish context. The physical examination did not find signs of meningeal irritation. The effective workup including thick gout, lumbar puncture, complete blood count, and C reactive protein was normal. An electrocencephalogram was not performed due to lack of availability of the device. Based on clinical data and the fact that Burundi is an area of high malaria prevalence, antimalarial and anticonvulsant treatment has been started. An alteration of consciousness (the Glasgow score of 7) had motivated a CT scan. Bithalamic hypodensities in favor of a vascular accident have been demonstrated. Etiological investigation revealed homozygous sickle cell disease ss during hemoglobin electrophoresis. The final evolution has been characterized by a return to normal consciousness. Conclusion: The complexity of the clinical picture following occlusion of Percherons artery makes it difficult to diagnose. Sickle cell disease may favour the occurrence of ischaemic lesions. Cerebral imaging enables the diagnosis to be made with certainty and avoids delays in treatment.

关键词： Stroke Bithalamic Infarction Sickel Cell Percheron Artery

A Method for Evaluating the Maximum Bending Degree of Flexural Toppling Rock Masses Based on the Rock Tensile Strain-Softening Model

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Earth Science 2024年第4期35卷 1243-1253页

作者： Jiongchao Wang Jun Zheng Jichao Guo Qing lü Jianhui Deng Department of Civil Engineering Zhejiang UniversityHangzhou310058China Center for Balance Architecture Zhejiang UniversityHangzhou310007China State Key laboratory of hydraulics and Mountain River Engineering College of Water Resource and HydropowerSichuan UniversityChengdu610065China

Flexural toppling occurs when a series of layered rock masses bend towards their free *** is important to evaluate the maximum bending degree and the requirement of supports of flexural toppling rock mass to prevent rock mass cracking and even failure leading to a *** on the rock tensile strain-softening model,this study proposes a method for calculating the maximum curvature(C_(ppmax))of flexural toppling rock *** applying this method to calculate Cppmax of 9 types of rock masses with different hardness and rock layer thickness,some conclusions are drawn:(1)the internal key factors affecting C_(ppmax)are E^(⋆)(E^(⋆)=E_(ss)/E_(0),where E_(0)and E_(ss)are the mean deformation moduli of the rock before and after reaching its peak tensile strength,respectively),the strainεt corresponding to the tensile strength of rock,and the thickness(h)of rock layers;(2)hard rock layers are more likely to develop into block toppling than soft rock layers;and(3)thin rock layers are more likely to remain in flexural toppling state than thick rock *** addition,it is found that C_(ppmax)for flexural toppling rock masses composed of bedded rocks such as gneiss is related to the tensile direction.

关键词： flexural toppling rock mass maximum bending degree strain-softening model curvature rock mechanics

阿托伐他汀钙治疗动脉粥样硬化患者的临床研究

在线全文

学校读者我要写书评

暂无评论

中国临床药理学杂志 2024年第4期40卷 492-496页

作者：尹俊锋逄涛娄华郑州市第一人民医院神经肌肉病区河南郑州450003

目的研究不同剂量阿托伐他汀钙治疗对动脉粥样硬化患者颈动脉内膜中层厚度(CIMT)和血清脂蛋白相关磷脂酶A2(lp-PlA2)、氧化低密度脂蛋白(ox-lDl)、同型半胱氨酸(hcy)水平的影响。方法回顾性选取动脉粥样硬化患者的病历资料,根据治疗... 详细信息

目的研究不同剂量阿托伐他汀钙治疗对动脉粥样硬化患者颈动脉内膜中层厚度(CIMT)和血清脂蛋白相关磷脂酶A2(lp-PlA2)、氧化低密度脂蛋白(ox-lDl)、同型半胱氨酸(hcy)水平的影响。方法回顾性选取动脉粥样硬化患者的病历资料,根据治疗方案分为低剂量组(阿托伐他汀钙片20 mg·d^(-1))和高剂量组(阿托伐他汀钙片40 mg·d^(-1))。比较2组患者治疗前后血脂[三酰甘油(TG)、总胆固醇(TC)、高密度脂蛋白(hDl)、低密度脂蛋白(lDl)]水平和颈动脉粥样硬化斑块特征(CIMT、斑块面积)及血清lp-PlA2、ox-lDl、hcy水平,记录治疗期间药物不良反应发生情况。结果低剂量组98例,高剂量组102例。治疗后,高剂量组、低剂量组的TG水平分别为(3.75±0.59)和(5.36±0.83)mmol·l^(-1),TC水平分别为(4.07±0.98)和(4.52±1.02)mmol·l^(-1),hDl水平分别为(1.89±0.58)和(1.49±0.42)mmol·l^(-1),lDl水平分别为(1.85±0.58)和(2.67±0.73)mmol·l^(-1),CIMT分别为(1.14±0.18)和(1.30±0.20)mm,斑块面积分别为(18.59±2.17)和(22.72±2.81)mm~2,血清lp-PlA2水平分别为(116.27±28.46)和(135.74±25.03)μg·l^(-1),ox-lDl水平分别为(12.07±2.59)和(13.42±2.25)μg·l^(-1),hcy水平分别为(11.92±3.12)和(15.21±3.06)μmol·l^(-1),在统计学上差异均有统计学意义(均P0.05)。结论与低剂量阿托伐他汀钙相比,高剂量阿托伐他汀钙治疗动脉粥样硬化可更好地改善患者血脂水平,有助于缩小斑块,抑制炎症反应,干预动脉粥样硬化的形成,二者安全性相当。

关键词：阿托伐他汀动脉粥样硬化颈动脉内膜中层厚度脂蛋白相关磷脂酶A2 氧化低密度脂蛋白同型半胱氨酸

la_(2)O_(3)掺杂对CDPF老化性能的影响

在线全文

学校读者我要写书评

暂无评论

稀有金属材料与工程 2024年第4期53卷 1032-1041页

作者：张允华郑森楼狄明房亮冯谦同济大学汽车学院上海201804 北京市生态环境监测中心北京100044

基于XRD、XPS、h_(2)-TPR等表征方法以及活性评价方法,研究了不同浓度la_(2)O_(3)掺杂CDPF样品水热老化状态下的理化特性与催化活性。结果表明:随着la_(2)O_(3)掺杂浓度增加,CDPF老化样品衍射特征峰位向大角度偏移程度以及结晶度均呈先... 详细信息

基于XRD、XPS、h_(2)-TPR等表征方法以及活性评价方法,研究了不同浓度la_(2)O_(3)掺杂CDPF样品水热老化状态下的理化特性与催化活性。结果表明:随着la_(2)O_(3)掺杂浓度增加,CDPF老化样品衍射特征峰位向大角度偏移程度以及结晶度均呈先降低后增加的趋势。la_(2)O_(3)掺杂能够较好地抑制样品在高温水热老化过程中的烧结和畸变,并且可以有效抑制活性位数量的减少,使CDPF表面Pt原子浓度基本保持不变,对CO、C_(3)h_(8)和NO催化性能的劣化率降低,并且随掺杂浓度的增大,CDPF抗老化性能有增强的趋势。

关键词： CDPF催化剂 la_(2)O_(3) 理化特性催化活性劣化性能