1) closed goaf
封闭采空区
1.
The air impulsion coupling model with roof caving and its difference solution under closed goaf;
封闭采空区顶板垮落-空气冲击耦合模型与差分解法
2) closed emptied stope
封闭空区
3) closed mining
封闭开采
1.
While the working face is threatened by the disasters of coal spontaneous combustion,and this problem is difficult to be settled by ventilation,using closed mining method for coal and coalbed methane is considered to be effective.
当采面受到瓦斯、煤炭自燃等灾害威胁,采用通风方法难以解决时,认为采用封闭开采方案可取得较好效果。
4) enclosed space
封闭空间
1.
In this paper,a theoretical study on active control of within enclosed space surrounded by flexiblestructure is accomplished.
本文从理论上研究了外力激励弹性结构条件下封闭空间有源消声问题。
2.
Based on the basic theory of ANC within the enclosed space,this paper models the enclosed space with the COMSOL software,and presents the simulation and analysis effects of noise reduction which is derived from the numbers and location of the secondary noise resources.
基于封闭空间有源消声的基本理论,利用COMSOL软件对封闭空间声场进行了仿真建模,并模拟分析了次级声源的数量和位置关系对消声效果的影响。
5) close box
封闭空箱
6) closed cavity
封闭空间
1.
The result of the numerical simulation of heat dissipation in a closed cavity is compared with the experiment result.
首次用组合坐标法对小空间自然对流换热问题进行数值模拟，并将封闭空间电缆群散热情况数值模拟的结果与实验结果比较，在所比较的工况点上，计算值与实验值相差小于５％。
补充资料：“自由市场”和封闭性的市场
自由市场亦称为开放性市场，是指商品的生产、销售或购买的集中程度不高，其变动主要受市场的自发力量即价值规律的作用支配，商品价格是在相对自由竞争的条件下形成的，但仍在程度不同的受到垄断的影响。
封闭市场是垄断控制型市场，在这种市场上，垄断者竭力限制竞争和供求自发的波动，使商品供求和价格按照自己希望的方向发展变化，获取高额利润。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条