【摘 要】
：
The current paper focuses on the influence of the process parameters on the peak values of the interfacial heat transfer coefficient(IHTC)at metal/die interface during high pressure die casting(HPDC)p
论文部分内容阅读
The current paper focuses on the influence of the process parameters on the peak values of the interfacial heat transfer coefficient(IHTC)at metal/die interface during high pressure die casting(HPDC)process.A"step shape"casting and AM50 alloy were used
其他文献
全球范围内,高频次、大范围暴发的蓝藻水华对淡水水体环境造成严重影响.微囊藻因其在生长特别是衰亡过程中向水体释放微囊藻毒素而威胁人类健康.因此,分析其产毒株及非产毒株在环境样品中的组成,建立产毒蓝藻的预报及评价体系显得极为重要.本文采用荧光原位杂交技术结合流式细胞技术实现对环境样品中产毒藻株的鉴别与定量.针对目标基因mcyA设计的、以地高辛标记的双链DNA探针可有效应用于产毒微囊藻FACHB905和
以硫酸盐为电子受体、氨为电子供体的反应称为硫酸盐型厌氧氨氧化,这是一个新的生物反应.迄今为止,虽已证明硫酸盐型厌氧氨氧化的存在,但并未获得进行该反应的微生物.本课题组从长期稳定运行的厌氧脱氮除硫反应器污泥中,分离获得了一株硫酸盐型厌氧氨氧化菌.形态观察、生理试验和16SrDNA序列比对表明,该菌株可归入Bacillus benzoevorans.以Biolog板检测发现,该菌株可利用多种碳源,基质
通过优化的溶胶-凝胶法制备活性炭负载的铁掺杂TiO2(Fe-TiO2/AC)复合体,使用比表面积分析仪、扫描电镜、X射线衍射、X射线光电子能谱、荧光光谱等对其结构特征进行表征.采用活性艳红K2G水溶液为标准模型降解物,对其光催化性能进行评价.结果表明:活性炭负载Fe-TiO2后,仍然保持有很高的比表面积,原因是活性炭的大孔和中孔没有被堵塞.Fe-TiO2/AC中没有Fe离子衍射峰出现,可能归功于F
运用煤岩学分类相关理论对燃煤飞灰岩相组成进行了系统定量分析,并采用固定床汞吸附反应系统对不同电厂飞灰吸附汞的能力进行了详细研究,结果表明:不同的飞灰对汞均有一定的吸附能力,其中以烟煤飞灰CTSR和CTL的富碳组分对汞的吸附能力最强,其吸附能力分别为10.3和9.36μg/g,与商业活性炭捕获能力相当;飞灰中汞的含量与其含炭量和比表面积并无明显的相关性.揭示了飞灰颗粒岩相组成,分析了飞灰脱汞能力的影
本文关于"对‘辐射热力学的新进展——辐射有效能光量子等效温度光量子熵常数’一文的讨论"中所举例证进行了分析,指明其例证中对相关概念的理解和使用有误.同时进一步阐述了光量子等效温度、光谱辐射有效能和光子熵常数与宏观态温度、热能有效能和宏观态熵的异同点,指出辐射能具有微观态的量子作用特性和宏观态的平均热能作用特性的双重性.
Fine metal particles with uniform shape,narrow size distribution and high purity are increasingly needed for specific uses in high tech industrial application.We report the direct chemical synthesis o
The present research brings new insights on the role of admixed corrosion inhibitors in the processes of cement hydration and rebar corrosion.The admixing of NaCl and the corrosion inhibitors in fresh
The elastic moduli of short-fiber-reinforced foams depend critically on the fiber content and fiber length,as well as on the fiber orientation distribution.Based on periodic tetrakaidecahedrons,the fi
Conventional lithographic printing processes using porous alumina for offset applications generally use"wet"routes. Recently"dry"processes have been developed which are based on a heat-induced hydroph
Superplastic behaviors of quasicrystal phase containing Mg-5.8Zn-1Y-0.48Zr alloy sheets fabricated by combination of extrusion and hot-rolling processes have been investigated at temperature ranging f