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Effects of Different Tree Species and Proportions on Soil Fertility Quality in Eucalyptus Mixed Plantation

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Meteorological and Environmental Research 2022年第3期13卷 74-77,81页

作者： Haitao JIANG Nianyong ZHAN Lin JIANG Heng QIN Jianying DENG Yuanli ZHU Junyu ZHAO Jian TANG Guangxi State-owned Weidu Forest Farm Laibin 530229China Guangxi State-owned Qipo Forest Farm Nanning 530225China Guangxi Zhuang Autonomous Region Forestry Research Institute/Guangxi Research and Development Center for New Forestry Fertilizer Nanning 530002China

In order to study the effects of Eucalyptus mixed plantation with different mixed tree species and mixed proportion on soil nutrient accumulation and fertility quality, Eucalyptus-Mytilaria laosensis and Eucalyptus-Magnolia sumatrana mixed plantations in Guangxi State-owned Qipo Forest Farm were selected as the research objects. Based on 15 conventional soil fertility indexes, the minimum data set and membership function method were used to evaluate the soil fertility quality of mixed plantations with different structures. The results showed that compared with pure forest, the soil organic matter, total nitrogen, total potassium, alkali hydrolyzable nitrogen, available phosphorus, available potassium and other nutrients of mixed plantations with different treatments were significantly increased, and the contents of Cu and Zn in trace elements were most significantly increased. Compared with pure forest, the soil fertility quality of mixed plantations with different structures was significantly improved. The treatment with the highest soil fertility quality was 25% of Eucalyptus-M. sumatrana mixed plantation. When formulating production and management strategies, it can refer to construction measures of the mixed plantation to ensure the sustainability of forest soil fertility, and promote the healthy and sustainable development of Eucalyptus plantation and downstream industries in Guangxi.

关键词： Minimum data set membership function Mixed plantation Sustainable management

Dimensional Analysis on the Perforation of Stiffened Plates by Projectiles

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Journal of Beijing Institute of Technology 2007年第4期16卷 393-398页

作者：宋卫东宁建国 State Key Laboratory of Explosion Science and Technology Beijing Institute of Technology

The phenomena attendant to the perforation of truncated oval shape projectile into multi-layered stiffened plates were investigated. Dimensional analysis was employed to give an empirical formula. Then a membership function was introduced to modify the empirical formula. The effects of initial velocities, base plate thicknesses, height and width of stiffener on residual velocities were explored. The predictions of the empirical formula are in reasonably good agreement with those of experiment and numerical results. All these results indicate that the empirical formula is capable of predicting the residual velocity of the projectile penetrating the multi-layered stiffened plates.

关键词： stiffened plates penetration/perforation impact membership function

Fuzzy Evaluation of Coal Seam Geological Condition of Fully-Mechanized Face in Ten-Million-Ton Mine

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Journal of China University of Mining and Technology 2005年第3期15卷 208-212页

作者： LI Wei-min DONG Guo-wei WANG Hong-sheng FENG Mei-mei School of Mineral and Safety Engineering China University of Mining ＆ Technology Xuzhou Jiangsu 221008 China Jisan Mine of Yanzhou Mining Group Jining Shandong 272100 China

Based on coal seam geological condition and mining technological characteristic in Jisan Mine, coal seamgeological condition is quantitative evaluated by using fuzzy evaluation with the view of coal mining and coalfaceproduction. The structure and index system of evaluation factor, the membership functions and weights of evaluationfactor, evaluation model and reliability in the coal seam geological conditions are expounded in detail. Eighty-twocoalfaces which will be exploited is classified. All of these have provided a theoretical foundation for the selection ofcoal mining technology and for sustainable development of the coal mine.

关键词： fuzzy evaluation membership function ten-million-ton mine

Non-probabilistic Hydraulic Turbine Blade Vibration Reliability Research Based on Fuzzy Failure Criterion

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Journal of Donghua University(English Edition) 2016年第2期33卷 336-339页

作者：庞煜张翔赖喜德 School of Energy and Environment Xihua University Key Laboratory of Fluid and Power Machinery Ministry of EducationXihua University

In hydraulic turbine engineering,turbine blade vibration reliability assessment is of great significance. Based on the interval mathematical theory, the variables existing in hydraulic turbine blade are described as interval variables. Considering the fuzzy failure criterion of turbine blade distancing from resonance and vibration fatigue stress,fuzzy possibilistic reliability is expressed and analyzed qualitatively taking normal bathtub function as the membership function of blade resonance failure and deflection major type function as the membership function of the intensity failure. As a result,hydraulic turbine blade vibration reliability is analyzed based on the fuzziness of variables and failure criterion. A safer working environment is provided under possibility context by comparing with the qualitative conclusions in the past literature.

关键词： fuzzy failure criterion interval variable fuzzy reliability membership function

Fuzzy Multi-Objective Semi-Definition Programming

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Journal of Mathematical Research and Exposition 2010年第4期30卷 599-609页

作者： Rui LIU Ke Cun ZHANG Department of Basic Xi'an Aerotechnical College Shaanxi 710000 P. R. China China Aerospace Times Electronics Corporation No.771 Research Institute Shaanxi 710000 P. R. China Department of Mathematics Xi'an Jiaotong University Shaanxi 710049 P. R. China

This paper first applies the fuzzy set theory to multi-objective semi-definite program-ming （MSDP）, and proposes the fuzzy multi-objective semi-definite programming （FMSDP） model whose optimal efficient solution is defined for the first time, too. By constructing a membership function, the FMSDP is translated to the MSDP. Then we prove that the optimal efficient solution of FMSDP is consistent with the efficient solution of MSDP and present the optimality condition about these programming. At last, we give an algorithm for FMSDP by introducing a new membership function and a series of transformation.

关键词： fuzzy multi-objective semi-definite programming membership function optimality efficient solution efficient solution optimality condition.

Study　on　Fuzzy　Comprehensive　Evaluation　of　Simulation　Schemes　of　Socio－economic　Systems

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Systems Science and Systems Engineering 1996年第2期6卷 155-161页

作者： WANG Zongjun(College of Business and Management Huazhong University of Science and Technology)Wuhan 430074, China

In this paper, we propose a multilayer multiobjective fuzzy comprehensive evaluation (MMFCE) method for assessing simulation schemes of socio-economyic systems of China. In this MMFCE method, multiple methods to determine membership grades of evaluation matrix, the procedure to determine multiobjective weights and multiple combination strategies of fuzzy operations under different evaluation rules are presented. And in this paper, we also describe the application of the MMFCE method in assessing several simulation schemes of socio-economic systems of China. Thus,the MMFCE method can be used by policy-makers in China to evaluate and compare alternative policies for socio-economic development of China.

关键词： Fuzzy comprehensive evaluation Multilayer multiobjective dicision-making membership function Multiobjective weights Model Socio-economic systems.

Improvement of Rainfall Prediction Model by Using Fuzzy Logic

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American Journal of Climate Change 2020年第4期9卷 391-399页

作者： Md. Anisur Rahman Department of Mathematics Islamic University Kushtia Bangladesh

This paper presents the improvement of the fuzzy inference model for predicting rainfall. Fuzzy rule based system is used in this study to predict rainfall. Fuzzy inference is the actual procedure of mapping with a given set of input and output through a set of fuzzy systems. Two operations were performed on the fuzzy logic model;the fuzzification operation and defuzzification operation. This study is obtaining two input variables and one output variable. The input variables are temperature and wind speed at a particular time and output variable is the amount of predictable rainfall. Temperature, wind speed and rainfall have to construct eight equations for different categories and which are shows the diagram of the graph. Fuzzy levels and membership functions obtained after minimum composition of inference part of the fuzzifications done for temperature and wind speed are considered as they represent the environmental condition enhance a rainfall occurrence which is effect on agricultural production.

关键词： Fuzzy Logic membership function Temperature Wind Speed Predicted Rainfall

There Also Can Be Fuzziness in Quantum States Itself—Breaking through the Framework and the Principle of Quantum Mechanics

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Journal of Modern Physics 2020年第6期11卷 952-966页

作者： Wenbing Qiu Department of Physics Faculty of Science Shihezi University Shihezi China

In this paper, an attempt is made to synthesize fuzzy mathematics and quantum mechanics. By using the method of fuzzy mathematics to blur the probability (wave) of quantum mechanics, the concept of fuzzy wave function is put forward to describe the fuzzy quantum probability. By applying the non-fuzzy formula of fuzzy quantity and Schrödinger wave equation of quantum mechanics, the membership function equation is established to describe the evolution of the fuzzy wave function. The concept of membership degree amplitude is introduced to calculate fuzzy probability amplitude. Some important concepts in fuzzy mathematics are also illustrated.

关键词： Fuzzy Quantum Probability Fuzzy Wave function membership function membership Degree Amplitude Fuzzy Probability Amplitude

Decision-oriented Usability Evaluation of an Operation Interface: Model and Application

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International Journal of Plant Engineering and Management 2012年第1期17卷 1-8页

作者： LI Xiao-jun SUN Lin-yan LI Min School of Management Xi＇an Jiaotong University Xi＇an 710049 P. R. China The State Key Lab for Manufacturing Xi＇an 710049 P. R. China The Second Artillery Engineering University Xi＇an 710025 P. R. China

To support multi-factor decision problems about usability evaluation, especially when studies fall short of comparable objects, a fuzzy synthetic evaluation model is explored in this paper. Grey relational analysis （GRA） is brought in the model to calculate weight vectors of the usability factors. And membership functions of a remark vector are constructed in the context of use of the operation interface. The present method is applied in usability evaluation of operation interface and is proved to be effective. The comprehensive usability gradation of the operation interface to good is 0. 616 4 that meets the requirements in practice.

关键词： usability evaluation fuzzy synthetic evaluation method grey relational analysis membership function