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First, from room temperature to 500oC, the shell structure is amorphous with crinkly and airtight character. The shell structure begins to change into γ-Al2O3 and α-Al2O3 at 900oC. The surface of shells shows nano-sized pores at 900oC from SEM and BET analyses. When heated to 1000oC and 1100oC, the shell forms stable α-Al2O3 structure with smooth surface. Cracks often occur at the triple grain junctions. The specific surface area and the total pore volume of the hollow spheres increase with the calcination temperature.
首先,将锻烧温度由室温提升至500℃时,球壳属非晶相皱褶状致密结构;在900℃时开始有γ-Al2O3相及些许的α-Al2O3相出现,由SEM及BET结果得知,900℃之球壳表面有许多奈米级孔洞出现;当加热至1000℃和1100℃时,球壳形成稳定相之Al2O3结构,壳层表面趋於平滑,且球壳在晶界处有微裂缝存在;由BET 结果得知,比表面积及总孔洞体积会随锻烧温度之增加,有增加之趋势。
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Information of system auto and cross spectrum, auto and cross correlation. coherent function, signal to noise ratio, frequency response and impulse response was established to help the study and arrangement of the module components.
由力规及加速规两量测之时域讯号,经快速富利叶转换,计算其自频谱及互频谱,再经反富氏转换回时域之自相关及互相关函数、相通函数、讯噪比、频率响应函数、脉冲响应函数。
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The main works of this paper are as follows:(1) The various methods for determining the cryolite ratio of electrolyte were summarized and compared. The phase constituents of aluminium electrolyte system were studied, the various cryolite ratio definitions for this reason were discussed.
本文研究和测定了工业铝生产中与电解质相关的几项重要的物理化学参数,包括铝电解质分子比的测定研究,氧化铝溶解性能的研究及测定,氧化铝浓度的测定及工业铝电解槽氧化铝浓度—槽电阻曲线的绘制,铝在电解质中溶解度的研究及测定。
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The surface displacement and deformation caused by the construction of double parallel tunnels is more complex than the single tunnel s.
城市中隧道常以双孔平行隧道的形式出现,而双孔平行隧道施工地表位移及变形比单孔的复杂,通常第二条隧道要滞后修建,所以当第二条隧道施工时,会对第一条隧道施工地表位移及变形产生影响,同时第二条隧道施工地表位移及变形也会受到第一条隧道的影响。
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With selecting earlap as the measuring spot,a multi-layer simulation model of the earlap is established.The transmittance of the earlap model and its distribution regularities under vary beam properties(beam radius,the input energy and its distribution) and model parameters are researched by Monte-Carlo method.
选择耳垂作为测量部位,建立了多层耳垂组织仿真模型,利用Monte-Carlo方法研究了不同光源特性(光束半径,入射能量大小及分布等)及模型参数下耳垂组织模型的光透射能量及分布规律,由透射光能量分布、光电二极管光敏面积和探测灵敏度推出特定测量信噪比要求的入射光能量。
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The models proposed, in addition to the VPC model proposed previously, include GAMM and GAMP for the modeling of manufacturing facility and process, respectively. The concepts of manufacturing capability for facility and process, as well as the mechanism for matching them, were also introduced into the proposed model. With these models, the knowledge of manufacturing facility and process for products with wide variations can be concisely represented for agile manufacturing execution control.
所提出之制造工程知识模型除先前所提之产品组构变异模型VPC外,尚包括表达生产设施变异知识之GAMM模型及表达制造流程变异知识之GAMP模型,此外,本文更引介了生产设施之产制能力及产品制程之产制能力需求的概念,以及两者如何匹配比对的机制,依此提出之制造工程知识模型及产制能力的概念定义与匹配机制,将能适当有效地表达非常多样变异的产品制造变异知识,从而能有效地支援精敏制造之执行管控的适切运作。
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The ratio of irrigated area to cultivated area,the number of electromechanical wells per each effective irrigational unit,the coefficient o...
结果表明:灌耕比、单位灌溉面积机电井数、土壤有效保水系数、农机动力系数等4个因子可以作为全省农业综合抗旱能力评价的指标;全省农业综合抗旱能力可以划分为高、中、低值区,其中,高值区主要分布在豫中、豫北的大部分地区;中值区比较分散,主要包括中西部低丘、缓岗区,平顶山东部、驻马店及信阳西南部,开封东部-商丘地区,林州-辉县县区;低值区又可分为2个小区,主要包括三门峡、洛阳中西部及南阳地区,信阳中部及东部。
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The result of analysis of maize quality indicates that under enhanced UV-B radiation, there is different influence on the percentage composition of soluble sugar of different varieties, and the tendency and amplitude of content variation of glucose, levulose and sucrose are different. The percentage composition of starch decreases, and lysine and protein increase. The variation tendency and amplitude of the protein with differentsolubility are different. The change of chemical quality in maize seeds is marked, and the effects of UV-B radiation are different with different maize variation.
UV-B增加对玉米品质影响的分析表明:UV-B增加处理下玉米的可溶性糖百分含量的变化不同的王米品种有着不同的表现,且葡萄糖、果糖、蔗糖变化的趋势及幅度也是不同的;淀粉百分含量是降低的;赖氨酸及蛋白质的含量比对照组要高;不同溶性的蛋白质受到影响后其变化趋向及幅度均不相同,玉米籽粒化学品质的变化是显著的;不同的玉米品种受到UV-B增加的影响后,其变化是不同的。
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Methods: The lymphocyte subsets and serum immunoglobulins and C3 of 45 cases of condyloma acuminate and 30 healthy women were measured with flow cytometry and rate nephelometry assay.
采用流式细胞技术及比浊法对45例生殖道湿疣及30例正常妇女的血淋巴细胞亚群及血清免疫球蛋白和补体进行检测。
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In this study, a culture with bitter gourd seedlings (Momordica charantia L.) was conducted in a field (clay slate noncalcareous alluvial soil, Tsp2), located in Wanli, Miaoli. There kinds of composted animal manure (chicken compost, cattle compost, and cattle-hog compost) as well as chemical fertilizer were applied to different treatment plots to investigate and compare their effects on soil fertility and the growth, and on the quality of bitter gourd. One check treatment was also conducted.
本研究系采用设施栽培方式,以嫁接苦瓜苗为品种材料,在苗栗县苑里(黏板岩非石灰性冲积土,水汴头系,TSp2)试验田,分别施用三种不同资材经堆肥化过程而生成之禽畜粪堆肥(鸡粪堆肥、牛粪堆肥和牛猪粪肥),并与施用化学肥料及不施任何肥料的对照组处理比较之,以评估不同来源及组成的有机质肥料对土壤肥力与苦瓜生育及品质产量之影响。
- 推荐网络例句
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Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).
呼气,收缩臀部肌肉;拱起身体,尽量抬起头来,右腿伸直朝向天花板(膝微屈,以避免肌肉紧张)。
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The cost of moving grain food products was unchanged from May, but year over year are up 8%.
粮食产品的运输费用与5月份相比没有变化,但却比去年同期高8%。
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However, to get a true quote, you will need to provide detailed personal and financial information.
然而,要让一个真正的引用,你需要提供详细的个人和财务信息。