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The following main results are obtained: The TiO_2 photocatalyst with small crystallite size, high surface area, narrow and uniform pore size distribution, and microporous frameworks could be prepared out by applying MW radiation in the preparation process. The microwave-induced fluorescence technique verified for the first time that microwave enhanced the formation rate of hydroxyl radical, leading to the increase in the photocatalytic efficiency. Compared with the conventional catalyst, TiO_2 prepared by MW dielectric heating owns a higher UV absorption ability, and its optical absorption edge and photovoltaic response are shifted toward the short wavelength region, resulting in increase of photooxidation efficiency. The photocatalytic conversion and the mineralization ratio of acetaldehyde are increased respectively by 30% and 40% over the TiO2 prepared by MW radiation when compared to the TiO2 prepared by the conventional heating. For the MW-assisted photocatalytic reaction over the MW-prepared TiO2, production of hydroxyl radicals is enhanced by 22.5%, and the photocatalytic conversion is accordingly increased by 20%. Similarlly, applying MW also increased the photocatalytic conversion and the mineralization ratio of acetaldehyde over TiO2/Al2O3 sample.

论文得到如下主要结果和结论:(1)微波介电加热TiO_2 溶胶可得到晶粒度小、光催化活性高、比表面积大和孔径分布窄而均一,且微孔发达的TiO_2光催化剂;在溶胶干燥处理过程中微波可使催化剂表面缺陷增加,进而导致光催化反应过程有更多的活性羟基自由基产生;(2)微波制备能显著增强TiO_2 样品的紫外光吸收率,并使其光吸收和光伏响应阈值发生蓝移,从而提高TiO_2的氧化还原能力;(3)与常规加热法所制TiO_2比较,微波法制备的TiO_2对乙醛的光催化降解转化率提高30%,CO_2生成率提高40%以上;(4)与未加微波辐射时相比,发现在光催化反应过程中施加微波,TiO_2 的羟基自由基生成速率提高了22.5%,相应CH_3CHO 光催化降解转化率提高了20%;对Al_2O_3/TiO_2催化剂,CH_3CHO 光催化降解转化率甚至提高了33%,同时CO_2 的生成率也都大幅度提高;(5)微波辐射可改变光催化降解乙醛的产物分布,推断施加微波时乙醛光催化降解按照羟基自由基引发的链式反应机理进行,微波&非热效应&起主要作用。

The sharp rising process of the reflectivity was explained quantitatively well based on the model of Auger recombination of high density plasma and Auger-recombination-induced heating to lattice, which showed the heating effect induced by Auger recombination in high density plasma should be the main mechanism of ultra-short laser pulse-induced phase change.

利用高密度等离子体的Auger复合及其感应的晶格加热模型较好地定量解释了反射率从最小到最大的快速变化过程,表明高密度等离子体的Auger复合加热导致的热效应可能是超快激光诱导相变发生的主要机制。

For group H2, two thermoseeds with 70℃ curie point were implanted into tumor tissues of each rat with a heating time of 6 minutes. Histological and immunohistochemistry observations on tumors were carried out in groups H1, H2 and C immediately and in 24 hours after the heating treatment.

将接种Walker-256肿瘤细胞的Wistar大鼠随机分为5组,C组、M组、T组、H组(加温治疗H1组,H2组),H1组:瘤内植入2颗居里点57℃热籽,持续30 min;H2组:2颗居里点70℃热籽,持续6 min。

The heater is shaped to conform to the flat planar surface of a T-bar shaped heating element, and clamped in place with insulators to provide maximum transfer of heat to the heating edge formed by the web portion of the T-bar.

该加热器形状制成与T型杆加热部件的平表面形状相一致,用绝缘件将其夹持在位置中,以便给由T型杆的腹板部分形成的加热边缘提供更大的热传导。

I still remember sleeping in a room with open windows at -10C, because the heating in the house could not be regulated per room.

我仍然记得,我曾在睡在零下10度的房间里,因为每个房间不能单独调节热量,这是2006年的事情了,当时这个房子刚刚兴建了2年

Moreover, our heating unit would function at 25C, whereas the Japanese unit was limited to 15C.

并且,我们的供热设备在零下25摄氏度仍能运行,而日本的设备在零下15度就不行了。

Records show a maximum deviation of 15C during the heating phase and no more that 5C during top temperature soak.

试验显示:这两座窑炉的温差偏离不超过15摄氏度,高温保温不超过5摄氏度偏差。

To achieve a constant temperature inside the DIRC-5 enclosure, a heating system with is installed.

要达到相对恒定的温度内dirc - 5圈地,采暖系统安装。

It is show that the suitable conditions are as following:the reaction temperature is 80~8℃; the heating time is ~0 min; the mass fraction of the abluent is 7%~0

果表明,在适宜的温度(80~8℃)、适当的加热时间(~0 min)、清洗剂质量分数为7%~0%和剂砂体积比为∶的条件下,YSFL-油砂清洗剂可以将油砂矿中油与砂较好的分离。

On the basis of Equivalent Heat Drop Theory of changeful heat quantity, a mathematical description that heating value enters or leaves thermodynamic system by absolute magnitude has been deduced.

在变热量等效热降法理论的基础上,推导出热质进出热力系统的数学描述———纯热量法。

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这对开发者来说是一个非常大的挑战,尤其是需要不断变化的Ajax。