stand-to-stand variation 中文意思是什麼
stand-to-stand variation
解釋
林分間變異-
The method proposed in this thesis do well in solving the problems of multi - damping - ratio - spectra simulation. it is convenient to obtain the pareto optimal solution set of the multi - object question by using implicit parallel genetic algorithms and the method can meet the practical needs for simulating ground motions coinciding with multi - damping - ratio - spectra in seismic design. the crossing rate and variance rate are important parameters of genetic algorithms which affect the rate of convergence, the adapting rate of cross and variation in this paper can auto - adapt and according to stand or fall of current sample, it assures the sample approach to the pareto optimal solution set in fast convergent speed
較好地解決多阻尼比反應譜擬合問題；本文方法通過一次運行就能獲得一組具有集系特性的地震動，在擬合多阻尼比反應譜的人造地震波集系的模擬方面有傳統方法所不能比擬的優勢，產生的人造波或人造波集系可滿足工程抗震設計需要；在遺傳演算法中，交叉概率和變異概率是影響收斂速度的重要參數，本文採用的改進自適應交叉概率和變異概率，可以根據當前樣本的好壞程度來自動地選擇適當的交叉概率和變異概率，以保證演算法始終以較好的速度向pareto最優解集逼近。 -
Nowadays, the urbanization is developing rapidly. in cities, high buildings stand everywhere, green districts are decreasing, the environment is being polluted, and the living space is reduced day by day. at the same time, the development of national economy, the improvement of people ’ s life level and the changement of life style make the variation of people ’ s tourist consumption opinion and aesthetic opinion. they long for going back to nature. the rural areas have wide space, fresh air, graceful environment and rich rural culture, and all of these factors have extreme attractivity to citizens. so, the combination of graceful natural environment and origional agricultural landscapes in rural areas and the citizens ’ strong wish to expand leisure tourism forms the objective background of the interactive development of agriculture and tourism. agricultural tour is a new region of tourism development, and traveling agriculture is a new way of agricultural development. the interactive development of agriculture and tourism conforms to the demands of agriculture ’ s and tourism ’ s sustainable development, and also bring perfect promotion effects to the improvement of rural areas ’ economic benefits and the development of tourism
農業旅遊是旅遊業發展的新領域，旅遊農業是農業發展的新途徑。農業與旅遊業的互動發展既符合農業和旅遊業可持續發展的要求，又對提高農村經濟效益和旅遊業發展起到了很好的促進作用。為探索如何綜合利用農業資源，合理開發旅遊項目，推動農業與旅遊業互動發展，本論文採用案例分析與區域綜合相結合、理論分析與實踐調查相結合等研究方法，嘗試性地提出了農業與旅遊業互動發展的涵義，從不同角度對其開發進行了模式構建，對農業旅遊產品和旅遊農業產品進行了分析，並在效應分析的基礎上揭示了農業與旅遊業互動發展的前景。
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