叉手交足 的英文怎麼說
中文拼音 [chāshǒujiāozú]
叉手交足
英文
with one's hands folded and legs crossed-
This study run through the basic idea of ecoregional approach methodology and systematic design by integrating agronomy, ecology, environmental economics, resource economics and maths. the study methods included macro - and micro - analysis, qualitative and quantitative analysis, theoretical and case study, statistical analysis and model simulation and so on. resources shortage and environmental pollution casued by intensive agriculture were examined for a specific suburban area shunyi district beijingissues were systematically analyzed including landuse changes, landuse driving force, water - limited yield simulation with wofost model, ecological, environmental and economical analysis of landuse, as well as optimizing pattern of landuse with rcsadss model
本研究立足於生態區域法的基本思路，採用系統設計的思想，通過農學、生態學、環境經濟學、資源經濟學、數學等多學科的交叉與融合，宏觀與微觀、定性與定量、理論與實證研究等相結合的方法，運用統計分析、模型模擬等技術手段，在大量調研基礎上，針對目前大城市郊區農業用地中存在資源短缺、環境污染等問題，以北京市順義區為典例，從土地利用現狀與動態、驅動力、 wofost模型產量模擬、生態環境經濟分析及種植業結構優化模式等方面進行了系統研究，獲得如下研究結果： （ 1 ） 2002年順義區的土地利用仍以農業用地為主，耕地、園地、林地和牧草地之和占總土地面積的56 ，農用地中糧食作物仍佔43 。From interdisciplinary view of structure dynamic and control, based on engineering background, considering defect and deficiency of conventional design method, structure / control integrated design, that is, system synthesis is discussed in this paper. matlab and i - deas based general simulation system of vibration control of piezoelectric laminated shell and its software architecture is also presented, by which, a system prototype environment - rsde, has been developed in order to provide high efficient ways and means for active vibration control. the systematical researches on the satisfactory vibration control of piezoelectric laminated shell are presented in this dissertation
本文基於結構動力學與控制理論交叉的獨特視角，結合工程實際背景，針對常規設計方法中的不足，就結構控制一體化設計，即系統設計方法，闡述了自己的見解；並採用此方法，提出了基於matlab和i - deas平臺的壓電層合殼振動控制的通用模擬系統設計方案，並根據這一方案編制了軟體模擬環境? rsde ，為壓電層合殼的振動主動控制設計，提供了高效率的技術開發手段。
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