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Experimental Study of the Influence of Flow Passage Subtle Variation on Mixed-flow Pump Performance

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Chinese Journal of Mechanical Engineering 2014年第3期27卷 615-621页

作者： BING Hao CAO shuliang State Key Laboratory of Hydroscience and Engineering Tsinghua University

In the mixed-flow pump design, the shape of the flow passage can directly affect the flow capacity and the internal flow, thus influencing hydraulic performance, cavitation performance and operation stability of the mixed-flow pump. However, there is currently a lack of experimental research on the influence mechanism. Therefore, in order to analyze the effects of subtle variations of the flow passage on the mixed-flow pump performance, the frustum cone surface of the end part of inlet contraction flow passage of the mixed-flow pump is processed into a cylindrical surface and a test rig is built to carry out the hydraulic performance experiment. In this experiment, parameters, such as the head, the efficiency, and the shaft power, are measured, and the pressure fluctuation and the noise signal are also collected. The research results suggest that after processing the inlet flow passage, the head of the mixed-flow pump significantly goes down; the best efficiency of the mixed-flow pump drops by approximately 1.5%, the efficiency decreases more significantly under the large flow rate; the shaft power slightly increases under the large flow rate, slightly decreases under the small flow rate. In addition, the pressure fluctuation amplitudes on both the impeller inlet and the diffuser outlet increase significantly with more drastic pressure fluctuations and significantly lower stability of the internal flow of the mixed-flow pump. At the same time, the noise dramatically increases. Overall speaking, the subtle variation of the inlet flow passage leads to a significant change of the mixed-flow pump performance, thus suggesting a special attention to the optimization of flow passage. This paper investigates the influence of the flow passage variation on the mixed-flow pump performance by experiment, which will benefit the optimal design of the flow passage of the mixed-flow pump.

关键词： mixed-flow pumps flow passage hydraulic performance pressure fluctuation model test

水热处理对热浸镀铝/微弧氧化陶瓷膜层的耐蚀性能研究

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当代化工研究 2024年第10期 1-4页

作者：苏晓慧胡平张桂福彭小飞王书亮四川省工业环境监测研究院四川610000 西南石油大学新能源与材料学院四川610500

本文探究了水热处理对热浸镀铝/MAO陶瓷膜层表面形貌、物相组成、耐蚀性能等方面的影响,并通过高温铝液腐蚀实验分析了热浸镀铝/MAO/水热处理试样的耐铝液腐蚀能力。结果表明:热浸镀铝/MAO/水热处理试样的陶瓷膜层主要由Al相、Al2O3相和... 详细信息

本文探究了水热处理对热浸镀铝/MAO陶瓷膜层表面形貌、物相组成、耐蚀性能等方面的影响,并通过高温铝液腐蚀实验分析了热浸镀铝/MAO/水热处理试样的耐铝液腐蚀能力。结果表明:热浸镀铝/MAO/水热处理试样的陶瓷膜层主要由Al相、Al2O3相和ZrO2相组成,适宜的水热处理时间能够使得陶瓷膜层表面更加平整光滑,微孔数量减少,耐蚀性能更好。通过高温铝液腐蚀实验发现,经热浸镀铝/MAO/水热处理工艺改性后的316 L不锈钢试样表面更加平整,腐蚀失重和腐蚀速率仅为未镀膜的316 L不锈钢试样的一半。

关键词：水热处理陶瓷膜层耐蚀性能

Regenerative medicine in China:demands, capacity,and regulation

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Burns & Trauma 2016年第2期4卷 71-77页

作者： Biao Cheng shuliang Lu Xiaobing Fu College of Life Sciences Medical College of PLAGeneral Hospital of PLABeijing 100853People's Republic of China The Key Laboratory of Trauma Treatment&Tissue Repair of Tropical Area PLAGuangzhou 510010People's Republic of China Ruijin Hospital Shanghai Jiao Tong UniversityShanghai 200025People's Republic of China College of Life Sciences Medical College of PLAGeneral Hospital of PLABeijing 100853People's Republic of China Chinese Academy of Engineering(Division of Medical and Health) College of Life SciencesMedical College of PLAGeneral Hospital of PLA28 Fu Xian RoadBeijing 100853People's Republic of China

Regenerative medicine(RM)is an emerging interdisciplinary field of research.Its clinical application focuses on the repair,replacement,and regeneration of cells,tissues,and organs by approaches including cell reprogramming,stem cell transplantation,tissue engineering,activating factors,and clone treatment.RM has become a hot point of research in China and other countries.China's main and local governments have attached great importance to RM and given strong support in relevant policies and funding.About 3.5 billion RMB has been invested in this field.Since 1999,China has established about 30 RM centers and cooperates with many advanced countries in RM research and benefits from their cooperation.However,China needs to develop standards,regulations,and management practices suitable for the healthy development of RM.In this review,we focus on its great demand,capacity,and relative regulations.

关键词： Regenerative medicine Stem cell Tissue engineering China

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体外冲击波治疗膝关节骨性关节炎的研究进展

中国卫生标准管理 2024年第7期15卷 195-198页

作者：李辉谷宇胡国芳梁日观华树良百色市人民医院关节外科运动医学科广西百色533000

膝关节骨关节炎是一种常见的肌肉骨骼疾病,其发病机制复杂,且手术及药物等治疗效果欠佳,因此寻找一种延缓疾病进展、改善关节功能的治疗手段具有重要意义。体外冲击波疗法是一种特殊治疗,主要由气动、电动液压、电磁或压电发电机诱导产... 详细信息

膝关节骨关节炎是一种常见的肌肉骨骼疾病,其发病机制复杂,且手术及药物等治疗效果欠佳,因此寻找一种延缓疾病进展、改善关节功能的治疗手段具有重要意义。体外冲击波疗法是一种特殊治疗,主要由气动、电动液压、电磁或压电发电机诱导产生单脉冲瞬态声波,聚焦于需要治疗的区域。它被证实能够有效抑制多种炎症因子释放,改善软骨代谢,促进软骨细胞增殖分化,对于软骨的修复有一定的疗效。因此,作为一项新的治疗手段,在一些动物实验和临床研究中都显示出对骨关节炎的作用;作为一种安全有效的无创疗法,可推荐用于骨关节炎的治疗,但推荐的等级需要在进一步的研究中进行讨论。文章就体外冲击波在膝关节骨性关节炎中的作用机制和应用展开综述。

关键词：膝关节骨性关节炎体外冲击波疗法老年骨性疾病保守治疗康复治疗作用机制

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小盒商标纸在线压痕装置的设计与应用

包装工程 2024年第5期45卷 151-156页

作者：李宇飞李建军卢良海李欢覃树良陈炎强彭品刘瑱广西中烟工业有限责任公司柳州卷烟厂广西柳州545006

目的解决中支双铝包小盒商标纸因模切压痕不稳定出现的烟包小盒侧边弹开翻折、烟包变形等问题。方法设计小盒商标纸在线压痕装置,该装置包括机架、传动轴、辗送轮、压痕件、导纸轮、对压轮、压痕避让部和托纸轮,同时开展正交试验,获取... 详细信息

目的解决中支双铝包小盒商标纸因模切压痕不稳定出现的烟包小盒侧边弹开翻折、烟包变形等问题。方法设计小盒商标纸在线压痕装置,该装置包括机架、传动轴、辗送轮、压痕件、导纸轮、对压轮、压痕避让部和托纸轮,同时开展正交试验,获取压痕件半径、刃缘弧长和包装机作业速度最佳参数组合。结果应用在线压痕装置后,小盒商标纸压痕挺度的平均绝对误差由6.0减小至1.9,次品烟包频率由37.6包/班次降低至8.4包/班次,改进后比改进前降低了77.7%。结论设计的小盒商标纸在线压痕装置可使商标纸挺度处于适宜水平,降低了该类缺陷烟包频率,提高了烟包包装质量。该技术可为提高双铝包包装机的产品质量、作业效率及稳定性提供支持。

关键词：小盒商标纸压痕装置包装机次品烟包压痕挺度

耻骨后途径经阴道尿道中段无张力悬吊术治疗中重度压力性尿失禁的盆底超声指标变化分析

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临床泌尿外科杂志 2024年第2期39卷 98-101,106页

作者：丁上书陈娟孙羿刘莉穆靓南淑良张菲陕西省人民医院泌尿外科西安710068 陕西省人民医院超声诊断中心

目的:比较中重度压力性尿失禁(stress urinary incontinence,SUI)患者行耻骨后途径经阴道尿道中段无张力悬吊术(tension-free vaginal tape,TVT)手术前后的盆底超声指标的变化并进行分析。方法:纳入2019年11月—2022年3月在陕西省人民... 详细信息

目的:比较中重度压力性尿失禁(stress urinary incontinence,SUI)患者行耻骨后途径经阴道尿道中段无张力悬吊术(tension-free vaginal tape,TVT)手术前后的盆底超声指标的变化并进行分析。方法:纳入2019年11月—2022年3月在陕西省人民医院女性泌尿门诊就诊并收住院手术的42例中重度SUI女性患者,纳入患者完善入院相关检查,计划在全麻下行TVT,术前在静息和Valsalva动作状态下行经会阴的盆底超声检查,收集并记录尿道倾斜角和膀胱后角,术后收集并记录在静息和Valsalva动作状态下的尿道倾斜角、膀胱颈移动度、膀胱后角和尿道旋转角。结果:42例患者均完成手术治疗,术后临床症状改善。盆底超声检查显示,静息状态下,手术前后患者的膀胱后角显著减少[(124.20±4.50)°vs(110.51±3.20)°,P=0.030],尿道倾斜角变化差异无统计学意义[(23.60±2.97)°vs(23.86±1.89)°,P=0.930];Valsalva动作下,手术前后患者尿道倾斜角[(45.20±3.58)°vs(28.86±2.88)°,P=0.001]、膀胱后角[(159.97±5.96)°vs(134.49±5.76)°,P=0.003]、膀胱颈移动度[(2.77±0.93)cmvs(1.76±0.13)cm,P=0.001]、尿道旋转角[(67.22±4.44)°vs(40.54±4.68)°,P=0.001]均显著减少。结论:盆底超声可以帮助选择适合TVT手术的患者,预测手术效果和并发症风险,并监测术后吊带的状态和功能。盆底超声指标变化可以反映TVT手术对盆底解剖和功能的影响。

关键词：尿道中段无张力悬吊术压力性尿失禁盆底超声

STATE: A Clustering Algorithm Focusing on Edges Instead of Centers

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Chinese Journal of Electronics 2021年第5期30卷 902-908页

作者： ZHAO Boxiang WANG shuliang LIU Chuanlu School of Computer Science and Technology Beijing Institute of Technology Institute of E-Government Beijing Institute of Technology

With the expansion of data scale and the increase in data complexity, it is particularly important to accurately identify clusters and efficiently save clustering results. To address this, we propose a novel clustering algorithm, Shape clustering based on data field(STATE),which can quickly identify clusters of arbitrary shapes and greatly reduce the storage space of clustering results in any datasets without reducing the accuracy. STATE mainly focuses on finding the edges of clusters and directions of edges instead of clustering centers through the data field.The results of STATE are presented as the edges of clusters without data objects inside clusters and without noise.Extensive experiments show that STATE can recognize complex data distribution in noisy environments without discrimination and greatly save the storage space of clustering results. When it is applied in a real-world scene,facial feature extraction, STATE can recognize eyes, nose,mouth, eyebrows and facial contours automatically without calibrating key features or training. Using the extracted facial features, we achieve facial recognition with high accuracy.

关键词： Image recognition Computer vision and image processing techniques Other topics in statistics Complex data clustering Cluster edge Cluster center Data field Big data

Organoid models of gastrointestinal Neoplasms:Origin,current status and future applications in personalized medicine

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Genes & Diseases 2018年第4期5卷 323-330页

作者： Yi Pan shuliang Zhao Zhijun Cao Division of Gastroenterology and Hepatology Key Laboratory of Gastroenterology and HepatologyMinistry of HealthState Key Laboratory for Oncogenes and Related GenesRenji HospitalSchool of MedicineShanghai Jiao Tong UniversityShanghai Institute of Digestive Disease145 Middle Shandong RoadShanghai200001China

The in vitro organoid model is a major technological breakthrough that has been established as an important tool in many basic biological and clinical applications.This near-physiological 3D culture system accurately models various biological processes,including tissue renewal,stem cell/niche functions and tissue responses to drugs,mutations or damage.Organoids have the potential value of being an accurate model for disease predictions or drug screening applications and to identify the ideal treatment for that patient.Carcinogenesis can be modeled by mutating specific cancer genes in wild-type organoids;and patient-derived organoids provide an important resource in the development of personalized cancer treatment.Organoids from cancer patients could be used to identify the ideal treatment for a specific patient by growing matched healthy and diseased organoids from human cancer patients which additionally enables clinical screens for drug combinations.Organoids could also provide autologous cells ordin the futuredtissue for transplantation.In this review,we discuss the current advances,challenges and potential applications of this technique in gastrointestinal neoplasms.

关键词： Gastrointestinal neoplasms Intestinal stem cells Living biobanks Personalized medicine Stem cell niches Wnt signaling

Density estimated physicochemical properties of alanine-based ionic liquid [C_7mim][Ala] and its application in selective transesterification of soybean oil

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Science China Chemistry 2012年第8期55卷 1677-1682页

作者： FANG DaWei LI Meng GE RiLe ZANG shuliang yang JiaZhen GAO YanAn China Ionic Liquid Laboratory Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China Institute of Rare and Scattered Elements Chemistry Liaoning UniversityShenyang 110036China School of Chemistry and Materials Science Liaoning Shihua UniversityFushun 113001China

Amino acid ionic liquid (AAIL) based on alanine, 1-n-heptyl-3-methylimidazolium alanine ([C7mim][Ala]), has been prepared and characterized. Since the IL can form strong hydrogen bonds with water, trace amount of water is a problematic impurity in the IL. Using the standard addition method (SAM), the densities were measured in the temperature range from 293.15 to 343.15±0.05 K. On the basis of the experimental data of density, the surface tension , molar volume, and the molecular volume Vm, molar enthalpy of vaporization lgHm0, and the thermal expansion coefficients , for [C7mim][Ala] were estimated using semi-empirical methods. Also the interstice model has been verified with good accordance. Then the [C7mim][Ala] was taken as catalyst in the transesterification reaction with fatty acid, where soybean oil was used as raw material and methanol as reactant. The amount of catalyst, alcohol consumption, reaction time, temperature and other factors of the reaction were investigated. Using GC determination, the conversions were calculated by the internal standard method. The main ingredients of the products were identified by GC-MS as palm methyl ester and linoleic acid methyl ester only, which showed high selectivity in palmitic acid and linoleic acid.

关键词：酯交换反应密度估计离子液体丙氨酸物理化学性质大豆油亚油酸甲酯棕榈酸甲酯