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汽车测试工况研究

天津工程师范学院学报 2009年第1期19卷 40-43页

作者：李建温立志天津工程师范学院汽车与交通学院天津300222

在评价和研究车辆燃油消耗和污染物排放量时,车辆的运行工况是关键的技术要素。文章针对不同的车型和用途,研究了不同的测试工况,并对测试工况的开发、主要工况的特征及具体的应用进行了分析。

关键词：汽车测试工况性能评价

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絮凝联合真空预压处理吹填土的试验及机理

科学技术与工程 2018年第27期18卷 198-204页

作者：杨司盟温智力刘志明彭劼河海大学岩土力学与堤坝工程教育部重点实验室江苏省岩土工程技术工程研究中心(河海大学)南京210098

为了探究盐类对吹填土絮凝作用的影响及选择出最适合此类吹填土的絮凝剂种类及添加量,通过沉降柱试验和两组真空预压室内模型对比试验,研究使用絮凝联合真空预压法对含盐吹填土的加固效果,探究盐类对吹填土絮凝效果的影响。试验结果表明... 详细信息

为了探究盐类对吹填土絮凝作用的影响及选择出最适合此类吹填土的絮凝剂种类及添加量,通过沉降柱试验和两组真空预压室内模型对比试验,研究使用絮凝联合真空预压法对含盐吹填土的加固效果,探究盐类对吹填土絮凝效果的影响。试验结果表明,非离子型聚丙烯酰胺能对吹填土泥浆起到有效的絮凝作用;添加絮凝剂能够缩短真空预压完成的时间;相同条件下,添加絮凝剂会改善土样加固效果并提高真空预压作用的均匀性。

关键词：真空预压絮凝剂吹填淤泥土沉降柱盐类

Based on non-targeted metabolomics for differential components screening of Rosae Chinensis Flos and Rosae Rugosae Flos and their quality evaluation

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Traditional Medicine Research 2025年第2期10卷 1-15页

作者： Xu liang Ni-Hui Zhang zhi-Lai Zhan Guang-Lu Chang Yan Gao Xia li wen-Yuan Gao School of Pharmaceutical Science and Technology Faculty of MedicineTianjin UniversityTianjin 300193China State Key Laboratory for Quality Ensurance and Sustainable Use of Dao-di Herbs China Academy of Chinese Medical SciencesBeijing 100700China Key Laboratory of Modern Chinese Medicine Resources Research Enterprises Tianjin 300402China

Background:Rosa chinensis *** Rosa rugosa *** not only of ornamental value,but also edible flowers and the flower buds have been listed in the Chinese Pharmacopoeia as traditional *** two plants have some differences in efficacy,but the flower buds are easily confused for similar *** addition,large-scale cultivation of ornamental rose flowers may lead to a decrease in the effective components of medicinal ***,it is necessary to study the chemical composition and make quality evaluation of Rosae Chinensis Flos(Yueji)and Rosae Rugosae Flos(Meigui).Methods:In this study,40 batches of samples including Meigui and Yueji from different regions in China were collected to establish high-performance liquid chromatography ***,the fingerprints data was analyzed using principal component analysis,hierarchical cluster analysis,and partial least squares discriminant analysis analysis chemometrics to obtain information on intergroup differences,and non-targeted metabolomic techniques were applied to identify and compare chemical compositions of samples which were chosen from groups with large *** compounds were screened by orthogonal partial least-squares discriminant analysis and S-plot,and finally multi-component quantification was performed to comprehensively evaluate the quality of Yueji and ***:The similarity between the fingerprints of 40 batches roses and the reference print R was 0.73 to 0.93,indicating that there were similarities and differences between the *** principal component analysis and hierarchical cluster analysis of fingerprints data,the samples from different origins and varieties were intuitively divided into four *** least-squares discriminant analysis analysis showed that Meigui and Yueji cluster into two categories and the model was reliable.A total of 89 compounds were identified by high resolution mass spectrometry,mainly were flavonoids and flavon

关键词： Rosa chinensis Jacq. Rosa rugosa Thunb. metabolomics chemometrics multiple component quantification quality evaluation

Research and simulation of two-level grid-connected photovoltaic inverter system

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Journal of Measurement Science and Instrumentation 2014年第2期5卷 93-97页

作者： AN Bin GONG Mao-fa SU Yan-ping WANG zhi-wen li Lan-bing College of Electrical Engineering and Automation Shandong University of Science and Technology Qingdao 266590 China

The photovoltaic cell can achieve the optimal state, and the solar energy is converted into electrical energy suffi- ciently in the two-level PV power system by using the method of MPPT which is based on the front stage Boost converter. The back stage network side inverter adopts the method of deadbeat control and the grid power factor turns to be 1. The maximum power point tracking is realized, and the grid current has the same frequency and phase with the grid voltage through simulation. Therefore, efficiency of the solar module is improved and the sine AC wave of the inverter control circuit is high-quality. Each converter can achieve relatively independent function in the two-level PV power system by the method of Matlab/Simulink software simulation. The simulation shows that it is very conducive to the modular design and integration of the system.

关键词： photovoltaic MPPT deadbeat control simulation

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固定床反应器合成二甲醚的模拟分析

天然气化工—C1化学与化工 2002年第4期27卷 53-61页

作者：鲁文质滕立华肖文德华东理工大学联合化学反应工程研究所上海200237

通过对合成气一步法制二甲醚反应特点的研究 ,对固定床反应器用一维模型进行了数学模拟计算 ,得出了反应器轴向上的反应参数分布 ,并模拟分析了各类反应条件对催化床热点温度、CO的转化率 ,二甲醚时空产率和选择性的影响。

关键词：固定床反应器合成二甲醚合成气一步法燃料

Primary parenchymal squamous cell carcinoma of the kidney:A case report

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World Journal of Clinical Cases 2025年第4期13卷 34-40页

作者： zhi-Hui Zheng Bo Shao Chao-Min Xu Ke Wang Jia-Zhu wen li-Kang Luo Jia-Cheng Guan Department of Ultrasound The Second People’s Hospital of QuzhouQuzhou 324000Zhejiang ProvinceChina Department of Radiology Shulan(Quzhou)HospitalQuzhou 324000Zhejiang ProvinceChina Department of Radiology The Second People’s Hospital of QuzhouQuzhou 324000Zhejiang ProvinceChina Department of Pathology The Second people’s Hospital of QuzhouQuzhou 324000Zhejiang ProvinceChina

BACKGROUND Primary squamous cell carcinoma(SCC)of the renal parenchyma is extremely rare,with only nine cases *** SUMMARY This study reports a 51-year-old man with primary SCC of the renal *** patient was admitted with recurrent dull pain and discomfort in the right lumbar region,which had worsened over 2 weeks,accompanied by painful gross *** antigen(SCCA)levels were elevated,and imaging revealed a renal mass with associated *** patient underwent laparoscopic unilateral nephrectomy and lymph node *** pathology confirmed highly differentiated SCC with necrosis in the right renal parenchyma,with negative renal pelvis and *** pathological stage was *** months after surgery,the tumor recurred with involvement of the liver,right psoas major muscle,and inferior vena *** patient refused chemotherapy and succumbed to the disease 6 months postoperatively due to disease *** We report a case of primary SCC of the renal parenchyma,a rare renal *** clinical symptoms,laboratory tests,and imaging findings are nonspecific,making accurate and timely diagnosis *** to the literature,for patients with renal calculi accompanied by a renal mass,elevated serum SCCA levels,and magnetic resonance imaging showing cystic or cystic-solid masses within the kidney with pseudocapsules and heterogeneous mild enhancement,the possibility of this disease should be considered.

关键词： Renal tumor Renal parenchyma Squamous cell carcinoma Renal calculi Computed tomography Case report

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中药玉竹及其混淆品的性状和显微鉴别

上海医科大学学报 1993年第4期20卷 294-300页

作者：王志伟施大文李自力毕兆岐林筝上海医科大学药学院生药学教研室

本文报道8种玉竹:玉竹Polygonatum odoratum(Mill)Druce(野生、栽培)、多花玉竹***(Mill)Druce ***(Miq)Ohwi、毛筒玉竹P inflatumKom、小玉竹P humile Fisch ex Maxim.康定玉竹P,prattii Baker、二苞黄精P invo-lucratum(Franch et Sav)Maxim和长苞黄精P desoulayi Kom及其3种混淆品:散斑竹根七Disporopsis aspera(Hua)Engl ex Krause,深裂竹根七D pernyi(Hua)Diels和鹿药Smilacina japonica A Gray的生药性状及显微鉴定的研究结果,并分别列出生药性状、组织构造及粉末特征检索表、组织图和粉末特征图。

关键词：玉竹鉴定

A low redox potential and long life organic anode material for sodium-ion batteries

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Journal of Energy Chemistry 2025年第1期100卷 557-564页

作者： zhi li Yang Wei Kang Zhou Xin Huang Xing Zhou Jie Xu Taoyi Kong Junwei Lucas Bao Xiaoli Dong Yonggang Wang Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials Institute of New Energy Collaborative Innovation Center of Chemistry for Energy Materials (iChEM) Fudan University Department of Chemistry Boston College School of Materials Science and Engineering Anhui University of Technology

Sodium-ion batteries （SIBs） with organic electrodes are an emerging research direction due to the sustainability of organic materials based on elements like C,H,O,and sodium ***,organic electrode materials for SIBs are mainly used as cathodes because of their relatively high redox potentials（>1 V）.Organic electrodes with low redox potential that can be used as anode are ***,a novel organic anode material （tetrasodium 1,4,5,8-naphthalenetetracarboxylate,Na4TDC） has been developed with low redox potential （lic *** three-sodium storage mechanism was demonstrated with various in-situ/ex-situ spectroscopy and theoretical calculations,showing a high capacity of 208 mAh/g and an average decay rate of merely 0.022%per ***,the Na4TDC-hard carbon composite can further acquire improved capacity and cycling stability for 1200 cycles even with a high mass loading of up to 20 mg *** pairing with a thick Na3V2（PO4）3cathode (20.6 mg cm-2),the as-fabricated full cell exhibited high operating voltage （2.8 V）,excellent rate performance and cycling stability with a high capacity retention of 88.7% after 200 cycles,well highlighting the Na4TDC anode material for SIBs.

关键词： Organic anode material Low redox potential Composite anode Sodium-ion batteries

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声光可调谐滤光器光学特性的研究

天津大学学报（自然科学与工程技术版） 2003年第4期36卷 395-399页

作者：桑伟徐可欣周定文王智丽天津大学精密测试技术及仪器国家重点实验室天津300072

对声光可调谐滤光器(AOTF)的光学特性进行了实验研究,探讨了AOTF重要光学特性的测量方法并提出了通过改变电声换能器形状压缩衍射光旁瓣的方法,通过实验测量了AOTF重要光学特性,并比较了两种电声换能器形状对衍射光的影响.结果表明,可... 详细信息

对声光可调谐滤光器(AOTF)的光学特性进行了实验研究,探讨了AOTF重要光学特性的测量方法并提出了通过改变电声换能器形状压缩衍射光旁瓣的方法,通过实验测量了AOTF重要光学特性,并比较了两种电声换能器形状对衍射光的影响.结果表明,可以通过改变换能器形状达到压缩旁瓣的目的.

关键词：声光可调谐滤光器光学特性电声换能器声光相互作用分光系统衍射光旁瓣