medium n. (pl. -dia ) 1.媒介物;传导体;媒质,基质,介质,介体;中间物;环境、生活情形。 2.手段,方法;媒介;〔常作 pl.〕宣传工具;传播媒介〔指报刊、广播、电视等〕。 3.中间,中庸;【数学】中数,平均;【逻辑学】中名辞;【生物学】培养基,培养液;颜料溶解液。 4.女巫,降神者。 5.【戏剧】(射火灯灯前的)隔板。 6.(纸张的)中号尺寸;〔pl.〕中型轰炸机。 mass media 大众传播媒介;宣传工具。 the happy medium 中庸。 the circulating medium = the medium of circulation 通货。 adj. 中等的,中级的,普通的;平均的。 medium quality (中级)物品。 a medium bowler 【板球】(速球与缓球之间的)中球投球员。 by [through] the medium of 通过,以…为媒介。 medium of advertisement 广告媒介〔指报刊等〕。 medium of exchange 交换媒介;货币;支票。
The hot dry rock geothermal energy is a r . ew clean energy and have excellent development prospects , but is not yet exploited on large - scale in our country then to mankind : the theories and technique of the heat extraction all belong to the new task in the new field , and already have a strong appeal to the international technology worker , and already have obtain certainly achievement , on the basis of study by our predecessors , this paper do the as follows work , acquire the following main result : lx present a many fields coupling mathematics model for solid - flow - heat of 3d blocked medium in hdr 高温岩体地热是我国以至人类尚未大规模利用而又极具广阔开发远景的新的洁净能源,对其进行开发利用的理论与技术都属于新型领域的新型课题,已经吸引了大批的国内外科技工作者的投入,并取得了一定的成果。在前人研究的基础上,本文做了如下工作,获得了如下主要成果: 1 、建立了高温岩体地热开发的块裂介质固、流、热多场耦合数学模型,模型控制方程包括完全耦合的变形方程、渗流方程、热传导与对流方程,描述了热储层的非线性特性。
In order to exhibit the application of the method of porous media macroscopical geometric classification and minimum energy dissipation , the combination system between one - dimension pipeline media and three - dimension block media is tried to simulate the destroying and developing process of soil piping erosion 为了进一步展示多孔介质宏观几何分类方法及最小能量耗散原理的应用,文中还尝试采用具有一维性质的管道介质与具有三维性质的块体介质组合体系进行了土体管涌破坏发展过程的模拟。