英语翻译虽然是专业类,但是不用太较真,差不多就可以.太专业词汇可以用A来代替,以下是内容：对流加热时热量是在温度梯度的作用下以缓慢的导热方式由木材外部向内部转移,木材表面水分

英语翻译虽然是专业类,但是不用太较真,差不多就可以.太专业词汇可以用A来代替,以下是内容：对流加热时热量是在温度梯度的作用下以缓慢的导热方式由木材外部向内部转移,木材表面水分
英语翻译
虽然是专业类,但是不用太较真,差不多就可以.太专业词汇可以用A来代替,以下是内容：
对流加热时热量是在温度梯度的作用下以缓慢的导热方式由木材外部向内部转移,木材表面水分首先吸热蒸发,内部水分在含水率梯度作用下通过扩散或渗透的方式迁移到木材表面.而微波加热属于内部直接加热,微波投射使木材内外同时受热,木材内的水分同时吸收微波能迅速汽化,在内外蒸汽压力梯度作用下快速迁移到木材表面.所以微波加热相比对流加热具有加热速度快、能量利用率高等优点,而且加热具有选择性.国内外学者根据木材微波加热的特点对木材内温度的变化作了大量研究.
Antti A.L.通过试验测定了在微波干燥过程中木材内部温度的变化规律,结果表明：在干燥过程中,木材内部温度随着微波功率的增加而增加.Antti A.L.和Perre P.应用红外成像和CT扫描技术对微波干燥过程中白桦和松树板材的表面温度进行了分析.Lu L.和Bonafonte A.B.等对微波干燥过程中物料内部的平均温度变化进行了模拟分析,结果显示：在其它条件相同时,物料厚度越大,则干燥恒速期及后期的温度越高；物料表面换热系数越大,则物料表面的温度越低.李贤军较系统的研究了马尾松木材微波真空干燥的基本规律和特性.结果表明：木材的整个微波真空干燥过程分为三个阶段：快速升温加速干燥段,恒温恒速干燥段和后期升温减速干燥段.

英语翻译虽然是专业类,但是不用太较真,差不多就可以.太专业词汇可以用A来代替,以下是内容：对流加热时热量是在温度梯度的作用下以缓慢的导热方式由木材外部向内部转移,木材表面水分
Convective heating in the temperature gradient the heat under the effect of a slow thermal way by transferring exterior wood to the internal surface of the wood first endothermic water evaporation in the moisture gradient within the water by diffusion or infiltration under way to migrate to the wood surface. And an internal direct heating by microwave heating, microwave heating simultaneously inside and outside the projection of the timber, the timber of water absorb microwave energy rapidly vaporized, the vapor pressure gradient in the effect of internal and external quickly migrate to the wood surface. Therefore, compared to convection heating with microwave heating speed, energy efficiency advantages, and selective heating. Domestic and foreign scholars, according to the characteristics of microwave heating of wood in the wood made a lot of temperature changes.
Antti AL was determined by experiment in the microwave drying process of wood variation of internal temperature, the results show that: during the drying process, wood internal temperature with the increase of microwave power. Antti AL and Perre P. infrared imaging and CT scanning microwave drying process of birch and pine board surface temperature is analyzed. Lu L. and Bonafonte AB and other materials on the microwave drying process, the average temperature changes inside the simulation analysis, the results showed that: Other things being equal, the greater the material thickness, the drying constant rate period and the higher the temperature of the late; materials surface heat transfer coefficient is larger, the lower the temperature of the surface material. Li Xianjun more systematic study of microwave vacuum drying of the wood and the properties of the basic law ,The results showed that: the microwave vacuum drying of wood divided into three stages: rapid heating to accelerate the drying section, constant temperature constant deceleration and post drying section drying section.