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TRACKING METHODS FOR FREE SURFACE AND SIMULATION OF A liQUID DROPLET IMPACTING ON A SOliD SURFACE BASED ON SPH

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Journal of Hydrodynamics 2011年第4期23卷 447-456页

作者： li Da-ming XU Ya-nan li ling-ling LU hui-jiao BAI ling State Key Laboratory of Hydraulic Engineering Simulation and Safety School of Civil Engineering Tianjin University Tianjin 300072 China

With some popular tracking methods for free surface, simulations of several typical examples are carried out under various flow field conditions. The results show that the Smoothed Particle Hydrodynamics （SPH） method is very suitable in simulating the flow problems with a free surface. A viscous liquid droplet with an initial velocity impacting on a solid surface is simulated based on the SPH method, and the surface tension is considered by searching the free surface particles, the initial impact effect is considered by using the artificial viscosity method, boundary virtual particles and image virtual particles are introduced to deal with the boundary problem, and the boundary defect can be identified quite well. The comparisons of simulated results and experimental photographs show that the SPH method can not only exactly simulate the spreading process and the rebound process of a liquid droplet impacting on a solid surface but also accurately track the free surface particles, simulate the free-surface flow and determine the shape of the free surface due to its particle nature.

关键词： Smoothed Particle Hydrodynamics (SPH) method viscous liquid droplet impacting on a solid surface free surface

Entropy of Dirac Field in Non-stationary and Slowly Changing Reissner-Nordstrom Black Hole

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Communications in Theoretical Physics 2005年第5X期44卷 955-960页

作者： li hui-ling YANG Shu-Zheng JIANG Qing-Quan Institute of Theoretical Physics China West Normal University Nanchong 637002 China

Using the thin film brick-wall model and WKB approximation, the entropy of the Dirac field in the non-stationary and slowly changing Reissner-Nordstrom (R-N) black hole is calculated. The result shows that the entropy... 详细信息

关键词： slowly changing thin brick-wall model Dirac field entropy of black hole

Hawking Radiation of Charged Particles via Tunneling from a Cylindrically Symmetric Black Hole in Anti-de Sitter Space-Time

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Communications in Theoretical Physics 2006年第4X期46卷 643-646页

作者： YANG Shu-Zheng JIANG Qing-Quan li hui-ling Institute of Theoretical Physics China West Normal University Nanchong 637002 China

Applying Parikh-Wilzcek＇s semi-classical quantum tunneling model, we study the Hawking radiation of charged particles as tunneling from the event horizon of a cylindrically symmetric black hole in anti-de Sitter space-time. The derived result shows that the tunneling rate of charged particles is related to the change of Bekenstein-Hawking entropy and that the radiation spectrum is not strictly pure thermal after taking the black hole background dynamical and self-gravitation interaction into account, but is consistent with the underlying unitary theory.

关键词： cylindrically symmetric black hole Bekenstein-Hawking entropy energy conservation charge conservation tunneling rate

Quantum Tunneling Radiation of Reissner-Nordstrom de Sitter Black Hole with a Global Monopole

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Communications in Theoretical Physics 2006年第3期45卷 457-460页

作者： JIANG Qing-Quan YANG Shu-Zheng li hui-ling Institute of Theoretical Physics West China Normal University Nanchong 637002 China

Applying Parikh＇s quantum tunneling model, we study the quantum tunneling radiation of Reissne- Nordstrom de Sitter black hole with a global monopole. The result shows that the tunneling rates at the event horizon and the cosmic horizon are related to Bekenstein-Hawking entropy if we take the energy conservation into consideration, and the true radiate spectrum is not precisely thermal.

关键词： Reissner-Nordstrom de Sitter black hole global monopole energy conservation tunneling rate

Quantum Tunneling Radiation of Kerr-NUT Black Hole

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Communications in Theoretical Physics 2006年第6X期46卷 991-994页

作者： li hui-ling YANG Shu-Zheng QI De-Jiang College of Physics Science and Technology Shenyang Normal University Shenyang 110034 China Institute of Theoretical Physics China West Normal University Nanchong 637002 China Department of Preparatory Courses Shenyang Institute of Engineering Shenyang 110136 China

Based on particles in a dynamical geometry, extending the Parikh ＇s method of quantum tunneling, radiation, we deeply investigate the quantum tunneling radiation of Kerr-NUT bhck hole. When self-gravitating action, energy conservation, and angular momentum conservation are taken into account, the emission rate of the particle on the event horizon is related to the change of Bekenstein-Hawking entropy and the emission spectrum is not precisely thermal, but is consistent with an underlying unitary theory.

关键词： Kerr-NUT black hole energy conservation angular momentum conservation tunneling rate

Development and evaluation of a herbal formulation with antipathogenic activities and probiotics stimulatory effects

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Journal of Integrative Agriculture 2016年第5期15卷 1103-1111页

作者： ZHOU Qian WANG Si-si YANG Guang ZHAO Wen li hui-ling College of Food Science and Technology Agricultural University of Hebei Baoding 071001 P.R. China Engineering Technology Research Center for Agricultural Product Processing of Hebei Baoding 071001 P.R. China

Searching alternative feed antibiotics is always a study hotspot in the field of animal production. In this study, the antipathogenic activities and probiotics stimulatory effects of 30 kinds of herbs were screened through Oxford cup method and Hungate roll method. 15 herbs showed significantly antibacterial activities（P〈0.05） against Escherichia coli, Salmonella enteritidis, Salmonella typhimurium and Staphylococcus aureus. Seven herbs showed greatly stimulatory promoting effects on Lactobacillus acidophilus and Bifidobacterium longum. Finally, five herbs were combined for the developed formulation with selective antibacterial properties and they were Mume Fructus（35%）, Isatidis Folium（25%）, Moslae Herba（20%）, Chrysanthemi Indici Flos（13%） and Bupleuri Radix（7%）. The herbal formulation showed significantly antibacterial abilities against four pathogens and stimulatory promoting abilities on two probiotics in vitro and the equivalent activities in broiler chickens in vivo against E. coli and L. acidophilus. The toxicity study showed it had no toxicity, which indicated that it would be a kind of preferred candidate for an alternative antibiotic in future animal production.

关键词： herbal formulation alternative feed antibiotic anti-pathogenic activity probiotic stimulatory effect

Efficacy and Safety of Bushen Huoxue Formula in Patients with Discogenic Low-Back Pain:A Double-Blind,Randomized,Placebo-Controlled Trial

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Chinese Journal of Integrative Medicine 2022年第11期28卷 963-970页

作者： ZHAN Jia-wen li Kai-ming ZHU li-guo WANG Shang-quan FENG Min-shan WEI Xu YU Jie TANG Bin YIN Xun-lu HAN Tao ZHANG Ping li ling-hui CHEN Ming SHAO Chen-chen General Orthopedics Department Wangjing HospitalChina Academy of Chinese Medical SciencesBeijing(100102)China Key Laboratory of Beijing of Traditional Chinese Medicine Bone Setting Beijing(100102)China Orthopedics Department Xiyuan HospitalChina Academy of Chinese Medical SciencesBeijing(100091)China The Second Department of Spine Wangjing HospitalChina Academy of Chinese Medical SciencesBeijing(100102)China

Objective:To assess the efficacy and safety of Bushen Huoxue Formula(BSHXF)for the treatment of discogenic low-back pain(DLBP).Methods:This was a parallel,double-blind,randomized,clinical trial performed between May 2019 and June *** patients were assigned by computerized random number table to the treatment group(lumbar traction and BSHXF,35 cases)or the control group(lumbar traction and placebo,35 cases).The patients received intervention for 3 *** was conducted before treatment and at week 1,2,3 during *** outcome was the self-reported score of Oswestry Disability Index(ODI).Secondary outcomes included Visual Analog Scale(VAS),clinical efficacy rate by minimal clinically important difference(MCID)as well as lumbar tenderness,muscle tone and lumbar spine *** reactions were ***-up was performed at 1 and 3 months after the end of ***:In the treatment group,ODI score was significantly decreased compared with baseline(Pline(Plinical efficacy rate of the treatment group was higher than that of the control group after treatment[32.35%(11/34)vs.3.13%(1/32),Plity in the treatment group at 3-week treatment were significantly improved compared with the control group(Plinical efficacy rate(all P<0.05).Moreover,VAS score was still significantly lower than the control group at 3-month follow-up(P<0.05).No adverse reactions were reported during the ***:BSXHF combined with lumbar traction can significantly imp

关键词： Bushen Huoxue Formula discogenic low-back pain intervertebral disc degeneration randomized controlled trial

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汽车营销渠道成员的选择

长安大学学报（自然科学版） 2007年第5期27卷 120-123页

作者：杜建李惠玲长安大学汽车学院陕西西安710064

结合选择汽车营销渠道成员的特点,应用AHP法(层次分析法)选择汽车营销渠道成员。探讨了汽车营销渠道成员选择的评价准则,并在采用Delphi法进行调查和指标修改的基础上,利用1-9尺度法确定了汽车营销渠道成员的选择评价指标体系,通过实例... 详细信息

结合选择汽车营销渠道成员的特点,应用AHP法(层次分析法)选择汽车营销渠道成员。探讨了汽车营销渠道成员选择的评价准则,并在采用Delphi法进行调查和指标修改的基础上,利用1-9尺度法确定了汽车营销渠道成员的选择评价指标体系,通过实例对3个被考察对象的综合实力进行了评价。评价结果表明:该方法可以客观地确定各评价指标的权重,反映了各指标对总体评价结果的影响;评价结果与被考察对象的实际综合实力相吻合。

关键词：汽车营销渠道成员选择评价 AHP(层次分析法) 指标体系权重

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论王鹏运、况周颐词学思想和创作的差异

求是学刊 2014年第1期41卷 110-116页

作者：李惠玲广西民族大学文学院广西南宁530006

从对"重拙大"的推崇、创作实践、对梦窗词的推许等看,王鹏运、况周颐的词学思想和创作有很大差异。王鹏运的"重拙大"论是就词格而言,况周颐的"重拙大"论则是在词境的层面展开。王鹏运的词能较好体现其"重拙大"的主张,而况周颐词对"重拙... 详细信息

从对"重拙大"的推崇、创作实践、对梦窗词的推许等看,王鹏运、况周颐的词学思想和创作有很大差异。王鹏运的"重拙大"论是就词格而言,况周颐的"重拙大"论则是在词境的层面展开。王鹏运的词能较好体现其"重拙大"的主张,而况周颐词对"重拙大"的体认是建立在"性灵语,以沉着之笔达出"的基础上。王鹏运欣赏梦窗词"无一字无来历"之妙,其词学梦窗之密又糅合自己之清疏,别具特色;况周颐则更注重梦窗词流露的真情,其词大量运用"芬菲铿丽"之字眼,倾心学习潜气内转的笔法,力求上接梦窗。这些差异与他们的身份、性情、兴趣等有关。

关键词：清代词学王鹏运况周颐词学思想