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Determination of effective thermal conductivity for polyurethane foam by use of fractal method

Science China(Technological Sciences) 2006年第4期49卷 468-475页

作者： shi mingheng li xiaochuan chen yongping Department of Power Engineering Southeast University Nanjing 210096 China Department of Power Engineering Southeast University Nanjing 210096 China Department of Power Engineering Southeast University Nanjing 210096 China

The microstructure of polyurethane foam is disordered, which influences the foam heat conduction process significantly. In this paper foam structure is described by using the local area fractal dimension in a certain small range of length scales. An equivalent element cell is constructed based on the local fractal dimensions along the directions parallel; transverse to the heat flux. By use of fractal void fraction a simplified heat conduction model is proposed to calculate the effective thermal conductivity of polyurethane foam. The predicted effective thermal conductivity agrees well with the experimental data.

关键词： polyurethane foam, porous media, thermal conductivity, fractal.

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宽矩形硅微通道中流动冷凝的流型

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化工学报 2009年第5期60卷 1080-1086页

作者：李鑫陈永平吴嘉峰施明恒东南大学能源与环境学院江苏南京210096

对水力直径90.6μm、宽深比9.668的矩形硅微通道中的流动冷凝过程进行了可视化研究。研究发现,宽矩形硅微通道中的冷凝,沿程主要有珠状-环状复合流、喷射流和弹状-泡状流等流型。在珠状-环状复合流区,冷凝液膜可覆盖通道竖直侧壁,而在... 详细信息

对水力直径90.6μm、宽深比9.668的矩形硅微通道中的流动冷凝过程进行了可视化研究。研究发现,宽矩形硅微通道中的冷凝,沿程主要有珠状-环状复合流、喷射流和弹状-泡状流等流型。在珠状-环状复合流区,冷凝液膜可覆盖通道竖直侧壁,而在通道长边上,仍然为珠状凝结。喷射流位置随着入口蒸气Reynolds数的增大而延后,通道截面形状对流动冷凝不稳定性也存在很大影响。喷射流之后为弹状-泡状流,弹状气泡沿程逐渐缩短,并在表面张力的作用下收缩成圆球形气泡。冷凝通道的平均传热系数将随着入口蒸气Reynolds数的增大而增大。

关键词：冷凝矩形微通道流型

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Molecular diagnosis and treatment of meningiomas:an expert consensus(2022)

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Chinese Medical Journal 2022年第16期135卷 1894-1912页

作者： Jiaojao Deng lingyang Hua liuguan Bian Hong chen ligang chen Hongwei cheng Changwu Dou Dangmurenjiapu Geng Tao Hong Hongming Ji Yugang Jiang Qing Lan Gang li Zhixiong liu Songtao Qi Yan Qu Songsheng shi xiaochuan Sun Hajun Wang yongping You Hualin Yu Shuyuan Yue Jianming Zhang Xiaohua Zhang Shuo Wang Ying Mao Ping Zhong Ye Gong Group of Neuro-Oncology Society of Neurosurgery Chinese Medical Association Department of Neurosurgery Huashan HospitalFudan UniversityShanghai 200040China National Center for Neurological Disorders Huashan HospitalFudan UniversityShanghai 200040China Shanghai Key Laboratory of Brain Function and Restoration and Neural Regeneration Shanghai 200040China Neurosurgical Institute of Fudan University Shanghai 200040China Shanghai Clinical Medical Center of Neurosurgery Shanghai 200040China Department of Neurosurgery Rujn HospitalShanghai Jiao Tong University School of MedicineShanghai 200025China Department of Pathology Huashan HospitalFudan UniversityShanghai 200040China Department of Neurosurgery The Affiliated Hospital of Southwest Medical UniversityLuzhouSichuan 646000China Department of Neurosurgery The First Affiliated Hospital of Anhui Medical UniversityHefeiAnhui 230022China Department of Neurosurgery The Affiliated Hospital of Inner Mongolia Medical UniverstyHohoInner Mongolia 750306China Department of Neurosurgery The First Affiliated Hospital of Xinjiang Medical UniversityUrumqiXinjang 830011China Department of Neurosurgery The First Affiliated Hospital of Nanchang UniversityNanchangJiangxi 330006China Department of Neurosurgery Shanxi Medical Universty Shanxi Provincial People's HospitaTaiyuanShanxi 030012China Department of Neurosurgery The Second Xiangya HospitalCentral South UniversityChangshaHunan 410011China Department of Neurosurgery The Second Affiliated Hospital of Soochow UniversitySoochowJjangsu 215004China Deparment of Neurosurgery Qiu HospitalCheeloo College of Medicine and Insttute of Brain and Brain-Inspired ScienceShandong University JinanShandong 25003China Department of Neurosurger Xiangya HospitalCentral South UuniversitChangshaHunan 410008China Department of Neurosurgery Nanfang HospitalSouthern Medical UniverstyGuangzhouGuangdong 510515China Department of Neurosurgery Tangdu HospitalThe Fourth Miltay Medial UniverstXi'anShaanxi 710038China Department of Neurosurgery Fujian Medial University fliated Union H

Meningiomas are the most common primary intracranial neoplasm with diverse pathological types and complicated clinical *** fifth edition of the WHO Classification of Tumors of the Central Nervous System(WHO CNS5),published in 2021,introduces major changes that advance the role of molecular diagnostics in *** follow the revision of WHO CNS5,this expert consensus statement was formed jointly by the Group of Neuro-Oncology,Society of Neurosurgery,Chinese Medical Association together with neuropathologists and evidence-based *** consensus provides reference points to integrate key biomarkers into stratification and clinical decision making for meningioma patients.

关键词： Clinical diagnosis Expert consensus Meningioma Molecular subtyping Therapeutic treatment

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