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Investigation of CFD Calculation Method of a Centrifugal Pump with Unshrouded Impeller

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Chinese Journal of Mechanical Engineering 2014年第2期27卷 376-384页

作者： WU Dazhuan YANG Shuai XU Binjie liu qiaoling WU Peng WANG Leqin Institute of Process Equipment Zhejiang University Engineering Research Center of High Pressure Process Equipment and Safety of Ministry of Education Zhejiang University

Currently, relatively large errors are found in numerical results in some low-specific-speed centrifugal pumps with unshrouded impeller because the effect of clearances and holes are not accurately modeled. Establishing an accurate analytical model to improve performance prediction accuracy is therefore necessary. In this paper, a three-dimensional numerical simulation is conducted to predict the performance of a low-specific-speed centrifugal pump, and the modeling, numerical scheme, and turbulent selection methods are discussed. The pump performance is tested in a model pump test bench, and flow rate, head, power and efficiency of the pump are obtained. The effect of taking into consideration the back-out vane passage, clearance, and balance holes is analyzed by comparing it with experimental results, and the performance prediction methods are validated by experiments. The analysis results show that the pump performance can be accurately predicted by the improved method. Ignoring the back-out vane passage in the calculation model of unshrouded impeller is found to generate better numerical results. Further, the calculation model with the clearances and balance holes can obviously enhance the numerical accuracy. The application of disconnect interface can reduce meshing difficulty but increase the calculation error at the off-design operating point at the same time. Compared with the standard k-ε, renormalization group k-ε, and Spalart-Allmars models, the Realizable k-ε model demonstrates the fastest convergent speed and the highest precision for the unshrouded impeller flow simulation. The proposed modeling and numerical simulation methods can improve the performance prediction accuracy of the low-specific-speed centrifugal pumps, and the modeling method is especially suitable for the centrifugal pump with unshrouded impeller.

关键词： centrifugal pump unshrouded impeller numerical simulation clearance turbulence model

Carbon dots enhanced gelatin/chitosan bio-nanocomposite packaging film for perishable foods

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Chinese Chemical Letters 2022年第10期33卷 4577-4582页

作者： Bofei Fu qiaoling liu Minghuan liu Xiaofang Chen Hetong Lin Zongping Zheng Junqiu Zhu Congjie Dai Xiaochen Dong Da-Peng Yang Key Laboratory of Chemical Materials and Green Nanotechnology College of Chemical Engineering and Materials ScienceQuanzhou Normal UniversityQuanzhou 362000China Department of Clinical Laboratory The Second Affiliated Hospital of Fujian Medical UniversityQuanzhou 362000China Fujian Province Key Laboratory for Preparation and Function Development of Active Substances from Marine Algae College of Oceanology and Food ScienceQuanzhou Normal UniversityQuanzhou 362000China College of Food Science Fujian Agriculture and Forestry UniversityFuzhou 350002China School of Physical and Mathematical Sciences Nanjing Tech UniversityNanjing 211800China

Carbon dots(CDs)with intriguing fluorescent property,good biocompatibility,high stability,easy interaction with substrates,are burgeoning carbon nanoparticles with large potential in various *** CDs into the polymer matrix is becoming a popular strategy to endow the complex with new ***,the green-synthesized CDs was integrated into the mixture of gelatin(derived from waste fish scale)and chitosan,and a multifunctional bio-nanocomposite(defined as Gelatin/Chitosan/CDs)film was developed,which showed the excellent antibacterial,antioxidant,pH-sensitivity,UV shielding,and blue-emission *** effects of different concentrations of CDs on the physical,mechanical,structural,and functional activity of bio-nanocomposite film were *** with the Gelatin/Chitosan film,the Gelatin/Chitosan/CDs film with an optimum addition of 20%CDs showed the enhanced antibacterial,antioxidant as well as UV shielding *** importantly,it was used as an effective packaging material for fish meat preservation,reducing the loss of nutritional quality consumption,extending the shelf life of ***,the bio-nanocomposite films also possessed the anti-counterfeiting and pH-responsive properties due to the strong fluorescent emission of CDs,and had the great potential in developing the intelligent packaging *** work shed new light on the new application of CDs and the synthesis of bio-nanocomposite film in food industry.

关键词： Carbon dots Bio-nanocomposite Gelatin UV shielding Intelligent packaging

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语义三角理论视域下的土木工程专业术语探析

中国科技术语 2025年第1期27卷 64-68页

作者：王艺霖夏风敏刘巧玲杨大彬山东建筑大学土木工程学院建筑结构加固改造与地下空间工程教育部重点实验室山东济南250101

为加深对土木工程专业术语的理解、促进专业知识学习,引入语义三角理论对土木工程专业术语进行了深层次的探析,构建了学习、掌握与发展土木工程专业术语的新路径。具体要点包括:语义三角形中的“外界物体/实物”对于土木工程专业可扩充... 详细信息

为加深对土木工程专业术语的理解、促进专业知识学习,引入语义三角理论对土木工程专业术语进行了深层次的探析,构建了学习、掌握与发展土木工程专业术语的新路径。具体要点包括:语义三角形中的“外界物体/实物”对于土木工程专业可扩充为广义“所指”、增加考虑隐蔽型效应与假定;“语言/符号”和“概念/词义”的关系有助于更好地理解“义同形不同”术语;“语言/符号”与“物体/实物/效应/假定”的关系有助于推动专业术语的发展与改进,同时促进新术语的不断产生。

关键词：语义三角土木工程实物概念

Preparation of folate-conjugated starch nanoparticles and its application to tumor-targeted drug delivery vector

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Chinese Science Bulletin 2006年第14期51卷 1693-1697页

作者： XlAO Suyao TONG Chunyi liu Xuanming YU Danmi liu qiaoling XUE Changgang TANG Dongyin ZHAO Lijian State Key Laboratory of Chemo/Biosensing and Chemometrics LifeScience and Technology Institute Hunan University Changsha 410082China

Anion starch nanoparticles (StNP) were prepared in water-in-oil microemulsion. Folate modi-fied with PEG was conjugated to the surface of StNP to obtain the folate-conjugated starch nanoparticles (FA-PEG/StNP). The average diameter of FA-PEG/ StNP determined by AFM and Zeta-Sizer apparatus was about 130 nm. Doxorubicin (DOX)-loaded FA- PEG/StNP was obtained via infiltrating combination. The result of UV spectrophotometer showed that the saturation concentration of DOX-loaded FA-PEG/ StNP was 28 μg/mg, which was effective for the con-trolled release of anticancer drug DOX. The cell ex-periments showed that the Lc50 of DOX-loaded FA-PEG/StNP and DOX-loaded StNP was higher than that of DOX, which indicates that FA-PEG/StNP and StNP can decrease the toxicity of DOX; while the lethal rate of DOX-loaded FA-PEG/StNP was 3 times that of DOX-loaded StNP with the same quantity of DOX, which indicates that FA in FA-PEG/StNP is ef-fective for improving the targeting function of nanoparticles, thus enhancing the inhibition effect of anticancer drug to cancer cell. This work demon-strates that the FA-PEG/StNP system is a potentially useful system for the targeted delivery of anticancer drug DOX.

关键词：叶酸受体肿瘤细胞药物输送阴离子淀粉乳酸 FA-PEG/ StNP

Generating Giant Membrane Vesicles from Live Cells with Preserved Cellular Properties

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Research 2019年第1期2019卷 859-867页

作者： qiaoling liu Cheng Bi Jiangling Li Xuejiao liu Ruizi Peng Cheng Jin Yang Sun Yifan Lyu Hui liu Huijing Wang Can Luo Weihong Tan Molecular Science and Biomedicine Laboratory(MBL) State Key Laboratory of Chemo/Bio-Sensing and ChemometricsCollege of BiologyCollege of Chemistry and Chemical EngineeringAptamer Engineering Center of Hunan ProvinceHunan UniversityChangshaChina Institute of Molecular Medicine(IMM) Renji HospitalShanghai Jiao Tong University School of Medicine and School of Chemistry and Chemical EngineeringShanghai Jiao Tong UniversityShanghaiChina Departments of Chemistry Physiology and Functional GenomicsMolecular Genetics and Microbiology and Pathology and Laboratory MedicineUF Health Cancer CenterCenter for Research at the Bio/Nano InterfaceUniversity of FloridaGainesvilleFLUSA

Biomimetic giant membrane vesicles,with size and lipid compositions comparable to cells,have been recognized as an attractive experimental alternative to living *** to the similarity of their membrane structure to that of body cells,cell-derived giant plasma membrane vesicles have been used as a membrane model for studying lipid/protein behavior of plasma ***,further application of biomimetic giant membrane vesicles has been hampered by the side-efects of chemical vesiculants and the utilization of osmotic *** herein develop a facile strategy to derive giant membrane vesicles(GMVs)from mammalian cells in biofriendly medium with high *** GMVs preserve membrane properties and adaptability for surface modifcation and encapsulation of exogenous molecules,which would facilitate their potential biological ***,by loading GMVs with therapeutic drugs,GMVs could be employed for drug transport to tumor cells,which represents another step forward in the biomedical application of giant membrane *** study highlights biocompatible GMVs with biomimicking membrane surface properties and adaptability as an ideal platform for drug delivery strategies with potential clinical applications.

关键词： attractive similarity preserve

Chlorogenic acid supported strontium polyphenol networks ensemble microneedle patch to promote diabetic wound healing

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Chinese Chemical Letters 2024年第8期35卷 491-497页

作者： Peizhe Li qiaoling liu Mengyu Pei Yuci Gan Yan Gong Chuchen Gong Pei Wang Mingsong Wang Xiansong Wang Da-Peng Yang Bo Liang Guangyu Ji Research Institute of Plastic Surgery Weifang Medical UniversityWeifang 261000China The Second Affiliated Hospital of Fujian Medical University Quanzhou 362000China Department of Thoracic surgery Shanghai Key Laboratory of Tissue EngineeringShanghai Ninth People’s HospitalShanghai Jiao Tong University School of MedicineShanghai 200011China The Third Affiliated Hospital of Xinxiang Medical University Institutes of Health Central PlainClinical Medical Center of Tissue Engineering and RegenerationXinxiang Medical UniversityXinxiang 453003China School of Rehabilitation Science and Engineering University of Health and Rehabilitation SciencesQingdao 266024China

Delayed or non-healing of diabetic wounds is a significant complication,often attributed to high glucose-induced M1 macrophage accumulation,impaired angiogenesis,and reactive oxygen species(ROS)*** this,we introduced a strontium polyphenol network microneedle patch(SrC-MPNs@MN-PP)for percutaneous drug *** patch,formulated with polymer poly(γ-glutamic acid)(γ-PGA)and epsilon-poly-l-lysine(ε-PLL),incorporates strontium polyphenol networks(SrC-MPNs).The release of chlorogenic acid(CGA)from SrC-MPNs not only neutralizes ROS,but strontium ions also foster ***,SrC-MPNs@MN-PP can ameliorate the diabetic wound microenvironment and expedite healing.

关键词： Chlorogenic acid Strontium Microneedle patch Strontium polyphenol network Exudate absorption Diabetic wound healing

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面向服务的语义知识发现研究

情报杂志 2011年第1期30卷 159-163,173页

作者：柳巧玲南京审计学院南京210029

企业在信息化过程中产生了大量的信息资源,为了将这些信息资源转变为企业的知识和财富,提出了构建面向服务的语义知识发现系统。论述了系统采用的技术提出了一种面向服务的语义知识发现模型,并对其实现的关键技术作了进一步的阐述。该... 详细信息

企业在信息化过程中产生了大量的信息资源,为了将这些信息资源转变为企业的知识和财富,提出了构建面向服务的语义知识发现系统。论述了系统采用的技术提出了一种面向服务的语义知识发现模型,并对其实现的关键技术作了进一步的阐述。该模型为构建面向服务的语义知识发现系统以及解决系统构建中的关键问题提供了理论指导。

关键词：知识发现本体服务匹配相似函数

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面向企业业务的智能知识推送研究

情报理论与实践 2010年第11期33卷 76-79页

作者：柳巧玲南京审计学院江苏南京210029

企业在生产过程中会不断产生新的知识,但用户却不能及时地了解这些新知识的存在,为了提高知识主动服务的能力,提出了构建面向企业业务的知识推送系统。首先阐述了企业业务活动与知识的关系,然后提出了一种面向企业业务的智能知识推送系... 详细信息

企业在生产过程中会不断产生新的知识,但用户却不能及时地了解这些新知识的存在,为了提高知识主动服务的能力,提出了构建面向企业业务的知识推送系统。首先阐述了企业业务活动与知识的关系,然后提出了一种面向企业业务的智能知识推送系统模型,并对其实现的关键技术作了进一步的阐述。该模型为构建面向企业业务的知识推送系统以及解决系统构建中的关键问题提供了理论指导。

关键词：知识推送企业语义匹配本体

Multifunctional assembly of biomimetic nanovesicles for spatially drug delivery efficient cancer therapy

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Multifunctional assembly of biomimetic nanovesicles for spat...