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Thermal Lattice Boltzmann Model for Compressible Fluid

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Chinese Physics Letters 2000年第3期17卷 209-211页

作者： sun cheng-Hai State Key Laboratory of Tribology Department of Engineering MechanicsTsinghua UniversityBeijing 100084

Wfe formulate a new thennal lattice Boltzmann model to simulate compressible flows with a high Mach *** main difference from the standard lattice Boltzmanii models is that the p&rticlc velocities are no longer a constantj varying with the mean velocity and internal *** proper heat conduction term in the energy equation is recovered by modiHcation of the fluctuating kinetic energy transported by *** simulation of Couette How is in good agreement with the analytical solutions.

关键词： particles. energy. lattice

Dark Energy Accretion onto a Black Hole in an Expanding Universe

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Communications in Theoretical Physics 2009年第9期52卷 441-444页

作者： sun cheng-Yi Institute of Modern Physics Northwest University Xi＇an 710069 China

By using the solution describing a black hole embedded in the FLRW universe,we obtain the evolvingequation of the black hole mass expressed in terms of the cosmological *** evolving equation indicates thatin the phant... 详细信息

关键词： black hole dark energy accretion FRW universe

Occupancy of rooms in urban residential buildings by users in cold areas of China

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Building Simulation 2023年第3期16卷 483-497页

作者： Qi Dong Zikai Ma cheng sun School of Architecture Harbin Institute of TechnologyHarbin 150006China Key Laboratory of Cold Region Urban and Rural Human Settlement Environment Science and Technology Ministry of Industry and Information TechnologyHarbin 150006China

Occupancy is used to represent the movements and locations of users among various zones of buildings,and it is the basis of all other daily energy consumption *** study investigated eight families in cold areas of China based on occupancy measurements obtained in four main rooms,i.e.,living room,bedroom,kitchen,and *** particular,we analyzed the duration of user occupancy and hourly mean occupancy,and characterized their regular and random *** to the results,we developed an event-based occupancy model using an inhomogeneous Markov chain,where the rooms were modeled and daily events were divided into three categories according to their *** established a new method for conversion between event characteristic parameters and a transition probability matrix,as well as an overlap avoidance method for active *** model was then validated using real *** results showed that the model performed well in terms of two evaluation *** model should improve the accuracy of simulations of occupancy.

关键词： event occupancy urban residential building simulation cold areas of China

子女代际支持对农村老年人生活满意度的影响研究

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江苏商论 2025年第1期 62-65,82页

作者：李成辉孙成军昆明理工大学管理与经济学院云南昆明650500

伴随中国农村人口老龄化程度加深,农村老年人的生活满意度问题成为学界关注的焦点。本研究基于CFPS数据库2020年的调查数据,运用有序logistic模型对此进行研究。研究发现:引入个人特征、医疗健康和家庭特征三类控制变量之后,子女对老人... 详细信息

伴随中国农村人口老龄化程度加深,农村老年人的生活满意度问题成为学界关注的焦点。本研究基于CFPS数据库2020年的调查数据,运用有序logistic模型对此进行研究。研究发现:引入个人特征、医疗健康和家庭特征三类控制变量之后,子女对老人的生活照料影响最大。此外,婚姻状况、教育程度、医疗条件、健康状况、子女数等因素也对农村老年人的生活满意度产生显著影响。研究结果有助于加深我们对农村老年人生活满意度的理解,并为改善农村养老质量提供有益的参考。

关键词：农村老年人子女代际支持生活满意度有序Logistic回归分析

Tissue-resident lymphocytes: from adaptive to innate immunity

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Cellular & Molecular Immunology 2019年第3期16卷 205-215页

作者： Haoyu sun cheng sun Weihua Xiao Rui sun Division of Molecular Medicine Hefei National Laboratory for Physical Sciences at Microscalethe CAS Key Laboratory of Innate Immunity and Chronic DiseaseSchool of Life SciencesUniversity of Science and Technology of ChinaHefeiChina Institute of Immunology University of Science and Technology of ChinaHefeiChina

Efficient immune responses against invading pathogens often involve coordination between cells from both the innate and adaptive immune *** multiple decades,it has been believed that CD8+memory T cells and natural killer(NK)cells constantly and uniformly *** recently was the existence of noncirculating memory T and NK cells that remain resident in the peripheral tissues,termed tissue-resident memory T(TRM)cells and tissue-resident NK(trNK)cells,observed in various organs owing to improved *** cells populate a wide range of peripheral organs,including the skin,sensory ganglia,gut,lungs,brain,salivary glands,female reproductive tract,and *** findings have demonstrated the existence of TRM in the secondary lymphoid organs(SLOs)as well,leading to revision of the classic theory that they exist only in peripheral *** cells have been identified in the uterus,skin,kidney,adipose tissue,and salivary *** tissue-resident lymphocytes do not recirculate in the blood or lymphatic system and often adopt a unique phenotype that is distinct from those of circulating immune *** this review,we will discuss the recent findings on the tissue residency of both innate and adaptive lymphocytes,with a particular focus on CD8+memory T cells,and describe some advances regarding unconventional T cells(invariant NKT cells,mucosal-associated invariant T cells(MAIT),andγδT cells)and the emerging family of trNK ***,we will focus on the phenotypes and functions of these subsets and discuss their implications in anti-viral and anti-tumor immunity.

关键词： Tissue-resident memory T cell Tissue-resident NK cell Viral infection Cancer

Pretreatment of heterocyclic pesticide wastewater using ultrasonic/ozone combined process

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Journal of Environmental Sciences 2011年第5期23卷 725-730页

作者： Zhenglong Xiong Xiang cheng Dezhi sun College of Environmental Science & Engineering Beijing Forestry University Beijing 100083 China

Ultrasonic/O3 combined process was employed to pretreat heterocyclic pesticide wastewater for increasing biodegradability and reducing biological toxicity. Influences of ultrasonic frequency, ultrasonic power, probe diameter, initial pH and 03 dosage on the COD removal were studied. The results showed that the ultrasonic/O3 process significantly improved the biodegradability and reduced the biological toxicity of the wastewater. The ratio of BODs/COD was increased from 0.03 to 0.55 and the EC50 increased from 11% to 52% under ultrasonic/O3 treatment. Low ultrasonic frequency brought better COD removal. Initial pH was found to have a high influence on the COD removal and alkaline conditions were more favorable. The influences of ultrasonic power and probe diameter were small. With an increase in O3 dosage, COD removal was effectively improved. The optimal operational parameters for the combined process on COD removal were ultrasonic frequency 20 kHz, initial pH 9.00, ultrasonic power 300 W and dosage of O3 454.8 mg/（***）, under which the efficiency of COD removal reached 67.2%.

关键词： heterocyclic pesticide wastewater ultrasonic O3 BOD5/COD biological toxicity

Drag reduction and flow structures of wing tip sails in ground effect

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Journal of Hydrodynamics 2020年第1期32卷 93-106页

作者： Jian-xun Zhou cheng-hong sun Daichin Shanghai Institute of Applied Mathematics and Mechanics Shanghai UniversityShanghai 200072China Shanghai Key Laboratory of Mechanics in Energy Engineering Shanghai UniversityShanghai 200072China

The hydrodynamics and flow structures of a base wing slotted with tip sails in proximity to the ground were studied experimentally in order to investigate the flow control efficiency of wing tip sails in ground *** experiment was conducted in a towing tank at a Reynolds number 1.5×10^*** lift and drag forces were measured by a transducer,the velocity fields of the wing tip vortices were measured using a time-resolved particle image velocimetry system(TR-PIV).The tip-sails and ground clearance were both effective in reducing the total drag,the lift coefficients of the tip-sails wings were increased as compared with that of a base *** lift-drag ratios of the tip-sails wings were improved obviously in a range of angles of attack from 2°to stalling *** tip-sails played more important role in unwinding the concentrated wing tip vortices at higher angle of attack,the intensity of the tip vortices were much weaker than that of the base *** development of the wing tip vortices was suppressed as well due to the inhibition of the ground,the downwash speed was reduced and the induced drag was decreased.

关键词： Wing tip-sails ground effect lift/drag force vorticity distribution induced drag reduction

Preparation and performance of photocatalytic regenerationable activated carbon prepared via sol-gel TiO_2

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Journal of Environmental Sciences 2006年第3期18卷 557-561页

作者： LIU Shou-xin sun cheng-lin College of Material Science and Engineering Northeast Forestry University Harbin 150040 China Dalian Institute of Chemical Physics The Chinese Academy of Sciences Dalian 116023 China

Preparation of photocatalytic regenerationable activated carbon （AC） is the key step for the practical application of in situ regeneration of exhausted AC. A novel photocatalytic regenerationable AC was prepared by sol-gel TiO2 in this work. The adsorption and regeneration performance of TiO2/AC were evaluated using phenol as model compound. Scanning electron microscope （SEM） and nitrogen （77 K） adsorption isotherm were used to determine the surface area, pore structure and the distribution of TiO2. The results showed that with the increase of TiO2 loading, adsorption capacity of TiO2/AC decreased and the regeneration efficiency increased. The photocatalytic regenerationable AC with suitable TiO2 loading （2 wt%） exhibited suitable adsorption capacity and regeneration efficiency. TiO2 located mainly in the entrance of macro-pore of carbon. The prepared TiO2/AC exhibited similar surface structure and pore structure with material carbon.

关键词： photocatalytic regenerationable activated carbon titanium dioxide

NK cell receptor imbalance and NK cell dysfunction in HBV nfection and hepatocellular carcinoma

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Cellular & Molecular Immunology 2015年第3期12卷 292-302页

作者： cheng sun Haoyu sun Cai Zhang Zhigang Tian Institute of Immunology School of Life Sciences University of Science and Technology of China Hefei China Institute of I mmunopharmacology andImmunotherapy School of Pharmaceutical Sciences Shandong University Jinan China

Hepatocellular carcinoma （HCC） is currently the third leading cause of cancer mortality and a common poor-prognosis malignancy due to postoperative recurrence and metastasis. There is a significant correlation between chronic hepatitis B virus （HBV） infection and hepatocarcinogenesis. As the first line of host defense against viral infections and tumors, natural killer （NK） cells express a large number of immune recognition receptors （NK receptors （NKRs）） to recognize ligands on hepatocytes, liver sinusoidal endothelial cells, stellate cells and Kupffer cells, which maintain the balance between immune response and immune tolerance of NK cells. Unfortunately, the percentage and absolute number of liver NK cells decrease significantly during the development and progression of HCC. The abnormal expression of NK cell receptors and dysfunction of liver NK cells contribute to the progression of chronic HBV infection and HCC and are significantly associated with poor prognosis for liver cancer. In this review, we focus on the role of NK cell receptors in anti-tumor immune responses in HCC, particularly HBV-related HCC. We discuss specifically how tumor cells evade attack from NK cells and how emerging understanding of NKRs may aid the development of novel treatments for HCC. Novel mono- and combination therapeutic strategies that target the NK cell receptor-ligand system may potentially lead to successful and effective immunotherapy in HCC.

关键词： activating receptor hepatocellular carcinoma inhibitory receptor natural killer cell natural killer receptor