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Wavelet Galerkin Methods for Aerosol Dynamic Equations in Atmospheric Environment

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Communications in Computational Physics 2009年第6期6卷 109-130页

作者： Dong liang Qiang Guo Sunling gong Department of Mathematics and Statistics York University4700 Keele StreetTorontoOntarioM3J 1P3Canada Air Quality Research Division S&T BranchEnvironment Canada4905 Dufferin StreetTorontoOntarioM3H 5T4Canada

Aerosol modelling is very important to study and simulate the behavior of aerosol dynamics in atmospheric *** this paper,we consider the general nonlinear aerosol dynamic equations which describe the evolution of the aerosol *** time and discrete time wavelet Galerkin methods are proposed for solving this *** using the Schauder’s fixed point theorem and the variational technique,the global existence and uniqueness of solution of continuous time wavelet numerical methods are established for the nonlinear aerosol dynamics with sufficiently smooth initial *** error estimates are obtained for both continuous and discrete time wavelet Galerkin *** examples are given to show the efficiency of the wavelet technique.

关键词： Aerosol dynamics wavelet Galerkin methods semi-discrete fully-discrete existence error estimate

Maternal obesity exacerbates the responsiveness of offspring BALB/c mice to cow's milk protein-induced food allergy

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Food Science and Human Wellness 2023年第3期12卷 920-928页

作者： Jingxin Gao Tiange Li Dong liang Han gong liang Zhao Xueying Mao Key Laboratory of Functional Dairy Ministry of EducationCollege of Food Science and Nutritional EngineeringChina Agricultural UniversityBeijing 100083China Henan Engineering Technology Research Center of Food Processing and Circulation Safety Control College of Food Science and TechnologyHenan Agricultural UniversityZhengzhou 450002China Applied Nutrition I China National Center for Food Safety Risk AssessmentBeijing 100022China

Food allergy has become a significant public health problem affecting a large number of people *** obesity causes inflammation and alters the immune system of offspring,which may exacerbate their food *** aim of this study was to determine whether offspring mice born to obese mothers would have more serve reactions to cow's milk protein-induced food allergy,and further investigate the underlying *** offspring BALB/c mice of mothers with normal and high-fat diets were sensitized withβ-lactoglobulin(BLG),*** obesity increased the serum immunoglobulin E and mouse mast cell protease levels,though did not have significant influence on anaphylactic symptom score,core temperature and diarrhea rate of offspring mice after BLG ***,maternal obesity led to a lower level of occludin mRNA expression in BLG-sensitized *** mice born to obese mothers exhibited increased mRNA expression levels of GATA-3,interleukin(IL)-4 and IL-10 in jejunum after BLG sensitization,indicating maternal obesity intensified Th2-type biased immune *** conclusion,maternal obesity exerted exacerbating effects on the responsiveness of their offspring to cow's milk protein sensitization.

关键词： Cow's milk allergy Maternal obesity Offspring Intestinal barrier Immune response

Air-combat behavior data mining based on truncation method

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Journal of Systems Engineering and Electronics 2010年第5期21卷 827-834页

作者： Yunfei Yin Guanghong gong liang Han College of Computer Science Chongqing University Chongqing 400044 E R. China School of Automation Science and Electrical Engineering Beihang University Beijing 100191 P. R. China

This paper considers the problem of applying data mining techniques to aeronautical *** truncation method,which is one of the techniques in the aeronautical data mining,can be used to efficiently handle the air-combat behavior *** technique of air-combat behavior data mining based on the truncation method is proposed to discover the air-combat rules or *** simulation platform of the air-combat behavior data mining that supports two fighters is *** simulation experimental results show that the proposed air-combat behavior data mining technique based on the truncation method is feasible whether in efficiency or in effectiveness.

关键词： air-combat truncation method behavior mining basic fighter maneuvers(BFMs) data mining.

ELECTRO-HYDRAULIC COMPOUND CONTROL METHOD AND CHARACTERISTIC OF CONTROL FOR TENSION SYSTEM WITH HIGH INERTIA LOADS

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Chinese Journal of Mechanical Engineering 2006年第3期19卷 391-395页

作者： zhong Tianyu WANG Qingfeng LI Yanmin gong Fangyou State Key Laboratory of Fluid Power Transmission and Control Zhejiang University Hangzhou 310027 China No.715 Research Institute China Shipbuilding Industry Corporation Hangzhou 310012 China

Based on the pressure regulation circuit adopting electro-hydraulic proportional relief valve to control tension, a new type of electro-hydraulic compound control circuit with throttle control unit is presented, which can obtain optimal dynamic damping ratio through real-time altering pressure-flow gain of the throttle control unit, improve the dynamic characteristic of tension follow-up control for the tension system with high inertia loads. Moreover, the characteristic when the cable linear velocity variation causes change of tension is investigated, and a compound control strategy is proposed. The theoretical analysis and experimental results show that the electro-hydraulic compound control circuit is effective and the characteristic of the compound control strategy is satisfactory.

关键词： High inertia loads Tension control system Compound control strategy

Equitable Total Coloring of F_n ∨ W_n

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Acta Mathematicae Applicatae Sinica 2009年第1期25卷 83-86页

作者： Kun gong zhong-fu Zhang Jian-fang Wang Institute of Applied Mathematics Lanzhou Jiaotong University Lanzhou 730070 China Institute of Applied Mathematics Academy of Mathematics and Systems Science Chinese Academy of SciencesBejing 100190 China

The minimum number of total independent partition sets of V ∪ E of graph G（V,E） is called the total chromatic number of G denoted by χt（G）. If the difference of the numbers of any two total independent partition sets of V ∪ E is no more than one＇, then the minimum number of total independent partition sets of V ∪ E is called the equitable total chromatic number of G, denoted by χet（G）. In this paper, we obtain the equitable total chromatic number of the join graph of fan and wheel with the same order.

关键词： Fan wheel join graph equitable edge coloring equitable total coloring

The Yield and Water Use Efficiency to First Cutting Date of Siberian Wildrye in North China

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Agricultural Sciences in China 2011年第11期10卷 1716-1722页

作者： LI Zi-zhong ZHANG Wei-hua gong Yuan-shi Department of Soil and Water Sciences China Agricultural University Beijing 100193 P.R.China

A field experiment study was conducted in Bashang Plateau in North China in 2008 to determine the effect of three first cutting dates on the growth and water use efficiency （WUE） of Siberian wildrye （Elymus sibiricus L.） in the agropastoral ecotone of North China （APENC）. The experiment was conducted in a split plot design with three replications with water supply regime as the main plot treatment and first cutting date as the subplot treatment. Two water supply regimes were used, which included rain-fed treatment as control （CK） and a single irrigation and straw mulch treatment （W）. Three first cutting date treatments were conducted at early heading stage on July 1 （E）, at late heading stage on July 12 （L）, and at flowering stage on July 27 （F）, respectively. The results showed that the forage yield and WUE were the lowest at early heading stage harvest, while the highest at flowering stage either in CK or W treatment. Under combined CK and W treatments, average forage yields of the F subplots were 2 900 and 6 703 kg ha-~, and the values of WUE were 0.82 and 2.28 kg m-3, respectively. Under the CK treatment, forage yields of the E and L subplots were 43.8 and 41.9% lower than the F subplots, and their values of WUE were 46.2 and 50.3% lower than F, respectively. Under the W treatment, the forage yields of the E and L subplots were 74.9 and 61.6% lower, and their values of WUE were 78.1 and 63.3% lower, respectively, as compared with F subplots. Therefore, earlier first cutting did not increase the regrowth of Siberian wildrye and improve the mismatch between rainy season and the period of high growth potential of the grass in the semiarid APENC.

关键词： siberian wildrye first cutting date forage yield water use efficiency North China

The investigation of multiple factors on elastic anisotropy of artificial shale based on the orthogonal experiment

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Petroleum Science 2023年第5期20卷 2773-2783页

作者： Fei gong liang-liang Gao Guan-Gui Zou Su-Ping Peng Yi-Chen Song College of Geoscience and Surveying Engineering China University of Mining and Technology(Beijing)Beijing100083China State Key Laboratory of Petroleum Resources and Prospecting China University of Petroleum(Beijing)Beijing102249China

Elastic anisotropy of shales is critical to accurate constraints for rock physical models,quantitative interpretation and hydraulic ***,the causes of elastic anisotropy of shales are very complicated,and the understanding of how multiple influence factors affect the elastic anisotropy of shales is still not ***,the orthogonal experiment,as an effective multiple factors experimental method,is adopted in this study to analyze the effect of multiple factors for shale elastic *** factors,clay content,organic matter(OM)content and compaction stress are selected as independent variables,the orthogonal test table L_(16)(4^(3))with four levels for each factor is *** to the designed orthogonal table,sixteen artificial shales are constructed based on the cold-pressing method,and all the dry artificial shales are measured by the ultrasonic *** influence of each factor on the elastic anisotropy and the sensitivity orders of three factors are obtained using the range *** orders of sensitivity for selected factors follow the sequence clay content>compaction stress>OM content for velocity anisotropy *** compaction mechanism of artificial shales is also discussed by the compaction factor,which are positively correlated with the velocity anisotropy *** clay platelets orientation distribution function(ODF)of samples is evaluated by a theoretical model,the ODF coefficients are significantly affected by the clay content and compaction stress,and W200 are much more sensitive to these factors than *** results can provide a critical rock physics basis for quantitative interpretation and reservoir prediction of the low-maturity or maturity shale reservoir.

关键词： Shale Elastic anisotropy Multiple factors Orthogonal design

NUMERICAL STUDY OF THE RELATIONSHIP BETWEEN APPARENT SLIP LENGTH AND CONTACT ANGLE BY LATTICE BOLTZMANN METHOD

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Journal of Hydrodynamics 2012年第4期24卷 535-540页

作者： ZHANG Ren-liang DI Qin-feng WANG Xin-liang DING Wei-peng gong Wei Shanghai Institute of Applied Mathematics and Mechanics and Shanghai Key Laboratory of Mechanics in Energy Engineering Shanghai UniversityShanghai 200072China

The apparent slip between solid wall and liquid is studied by using the Lattice Boltzmann Method （LBM） and the Shan-Chen multiphase model in this paper. With a no-slip bounce-back scheme applied to the interface, flow regimes under different wall wettabilities are investigated. Because of the wall wettability, liquid apparent slip is observed. Slip lengths for different wall wettabilities are found to collapse nearly onto a single curve as a function of the static contact angle, and thereby a relationship between apparent slip length and contact angle is suggested. Our results also show that the wall wettability leads to the formation of a low-density layer between solid wall and liquid, which produced apparent slip in the micro-scale.

关键词： Lattice Boltzmann Method (LBM) wettability apparent slip contact angle nano-particles adsorbing method

Upper Bound Solutions for Uplift Ultimate Bearing Capacity of Suction Caisson Foundation

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China Ocean Engineering 2019年第6期33卷 685-693页

作者： DAI Guo-liang ZHU Wen-bo ZHAI Qian gong Wei-ming ZHAO Xue-liang School of Civil Engineering Southeast University

Suction caisson foundation derives most of their uplift resistance from passive suction developed during the pullout movement. It was observed that the passive suction generated in soil at the bottom of the caisson and the failure mode of suction caisson foundation subjecting pullout loading behaves as a reverse compression failure *** upper bound theorems have been proved to be a powerful method to find the critical failure mechanism and critical load associated with foundations, buried caissons and other geotechnical structures. However, limited attempts have been reported to estimate the uplift bearing capacity of the suction caisson foundation using the upper bound solution. In this paper, both reverse failure mechanisms from Prandtl and Hill were adopted as the failure mechanisms for the computation of the uplift bearing capacity of the suction caisson. New equations were proposed based on both failure mechanisms to estimate the pullout capacity of the suction caisson. The proposed equations were verified by the test results and experimental data from published literature. And the two solutions agree reasonably well with the other test results. It can be proved that both failure mechanisms are reasonably and more consistent with the actual force condition.

关键词： suction caisson foundation bearing capacity upper bound solution failure mechanism