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To study the effects of different freezing temperatures on the cells structures and texture of kiwi fruit dices.

为研究不同冻结温度对猕猴桃果丁细胞结构和质构特性的影响,将猕猴桃果丁分别在温度-20,-25,-30℃速冻温度下冻结,研究速冻前后猕猴桃果丁细胞结构、穿刺力、VC和汁液流失率的变化。

The comparison study with the Laplace transform method of solving the transient temperature distribution and the finite difference method have discussed.

尤其对温度场的边界元求法、模腔的瞬态温度场分析进行了数学推导,对制品瞬态温度场的拉普拉斯变换法求解和有限差分法的求解进行了对比。

The ratio of the root-meansquare displacement to lattice constant at temperature of 0K and 〓 is also discussed.

同时亦讨论了在温度为0K及德拜温度〓时位错振动方均根与金属晶格常数的比值大小,从而对该温度时,位错的振动幅度大小有一个量级上的概念。

By using the air temperature measured by thermocouples and the glass temperature measured by infrared thermometer as the training sample, a model for prediction of the temperature parameters for the float glass in lehr was created based on the ameliorated BP neural network.

摘要利用热电偶测得的退火窑中空气温度和红外测温仪测得的玻璃表面温度作为训练样本,建立了基于BP神经网络的玻璃温度预测模型。

In the range from 0 to 25MPa, the linear degree of pressure-cavity length curve is 0.99996 and the sensitivity is 2nm/MPa . The temperature dependence effect of this sensor is small. In the temperature range from 22℃ to 200℃, the temperature sensitivity of the F-P cavity is about 0.03nm/℃.

实验结果表明,本文设计的微型EFPI光纤压力传感器性能良好,在0~25MPa范围内,压力—腔长关系曲线的线性度达0.99996,腔长一压力灵敏度为2nm/MPa;该传感器温度敏感性小,在22~200℃的温度范围内,腔长的温度敏感性约为0.03nm/℃。

Systemic studies environment temperature how to influence construction control, finds out linear regularity and function formula of the arch rib, selects optimal closure time, then fully meets requirements of closure precision and linear. By testing a lot of data on temperature and strain and adopting least squares collocation, this dissertation deduces the strain calculate formula that is amended by joining temperature factor, then improves accuracy of stresses testing data.

系统地研究外界温度变化对施工监控的影响,找出了拱肋变化的线性规律和函数式,选择出最佳合龙时机,保证了拱肋的合龙精度和线形要求;测试了大量温度与应力对应关系的实验数据,采用最小二乘拟合推估法,推导出温度修正后的应变计算公式,从而提高了应力测试数据的准确性。

Mechanisms of heat affected zone liquation and liquation cracking in GH150 alloy were investigated by using varestraint test and hot ductility test in conjunction with the differential thermal analysis and optical, scanning electron microsopy. On heating,γ/C liquation take places in the HAZ above 1250℃. When the temperature reaches 1353- 1375℃, a large amount of liquid particles due to initial melting can be observed within the grains near the fusion boundary. On cooling,γ/C eutectic and γ/ Laves phase eutectic take place at 1273 and 1200℃ respectively.

采用可变拘束试验、热塑性试验、差热分析、光镜与扫描电镜观察,研究了GH150合金焊接热影响区液化及液化裂纹形成机制加热过程中温度高于1250℃的热影响区由于γ/C共晶产生液化,在温度达到1353℃(固相约至1375℃的近维区,晶内出现大量液化点冷却过程中温度在1273和1200℃时形成γ/C共晶和γ/Laves相共晶。

This phenomenon indicated that the firefly luciferase was sensitive to the change of temperature.

最适反应温度为20~25℃,对温度极其敏感,当反应温度高于30℃时,该酶的活性快速失活。

The experiment study about the subcritical normalizing holding temperature effects the macrostructure and hardness of the 40SiMnCrNiMoA steel shows: When subcritical normalizing holding temperature is 760℃, the ferrite in the mixture phase structure is lumpish, the hardness of the steel is low (about HRC32), and when the holding temperature is over 800℃, the hardness of the steel is about HRC49, the ferrite in the mixture phase structure is in old critical range austenite grain boundaries, it is disadvantage for the steel strengthening. When the holding temperature is 780℃, the mixture phase structure is mixture phase structure including the strip ferrite、martensite and bainite, the ferrite is less than 20%wt, its grains are fine and even, the hardness of the steel is about HRC38, it is in the range of HRC35-40 which is the long-life drill rod needed.

亚温正火温度对40SiMnCrNiMoA的组织和硬度等性能的影响的实验研究表明,当亚温正火保温温度为760℃时,复合组织中的铁素体形态是块状,处理后的材料硬度相对较低(HRC32左右);而当采用大于800℃温度亚温正火处理,材料硬度为HRC49左右,组织中铁素体大部分较连续地存在于原奥氏体的晶界,对材料强化不利;当40SiMnCrNiMoA钢780℃亚温正火后,硬度为HRC38左右,在以往小钎杆较长寿命所需硬度范围HRC35-40内,而组织为细条状铁素体+以板条马氏体和条状无碳贝氏体为主的复合组织,晶粒细小均匀,铁素体体积含量少于20%。

In addition, larger temperature difference of heat transfer can enlarge the maldistribution of the temperature.

通过比较二次封头和普通封头换热器截面温度分布情况发现:二次封头结构明显地改善了换热器出口截面温度分布,尤其在大Re下,温度分布不均匀性的改善效果更加显著,同时换热效能可增加7%左右。

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然而,正如其名字所指出的那样,CD盘不能写,也不能用任何方式改变其内容。

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