热裂

A new way to avoid ambiguous point in mesh generation process has been proposed and realized by tiny movement of intersection.

在以上研究工作基础上，建立了基于工作站的热裂预测的数值模拟系统，已在沈阳水泵厂安装并投入运行。

A method for predicting product-yields of naphtha steam cracking was established by means of BP neural network model.

目前，工业上生产乙烯的主要方法是在管式裂解炉中采用热裂解法。

As Hf is added into the alloy the volume fraction of γ/γ′eutectic is increased and the temperature range between solidus and liquidus is expanded, which may maintain the effective linkage of interdendritic capillary feeding channel, thus improving the resistance of DS castings to ...

铪的加入，增加了共晶γ/γ′的体积分数，扩大了凝固范围，改善了合金凝固后期的毛细补缩通道的联系，从而减轻了热裂倾向性。随着铪含量的提高，合金的中温持久性能，特别是中温横向持久性能有所提高。

The stress-strain relation of the alloy under static tension has been investigated from room temperature to solidus, and the related mechanical parameters have been determined.

由两相区流变性能参数及T〓以下力学参数变化特点得出了35号碳钢质量停止补缩温度和枝晶间停止补缩温度，以及热裂形成的温度范围。

Targeting the biomass rice stalk,we use linestone as catalyst and cracking catalyse the tar which was pyrolysised from the target.We build the rice straw biomass gasification tar removal catalytic cracking process model by the least squares support vector machine model and optimize the model parameters through genetic algorithm.We also has gotten the best catalytic cracking temperature and gas residence time, making the highest rate of catalytic cracking tar.We made wood biomass as a target analysis so that we can thermally crack tar,and we can use genetic algorithms to optimize the model parameters that is based on the wood biomass gasification pyrolysis tar removal process model through the least-squares fitting method,then we got the best pyrolysis temperature and equivalence ratio,so that it is possible to make the tar content reach the minianum.Based on the least squares support vector machine model,we had established the model of the biomass sawdust Compression molding process and fit the Optimization Parameters objective function of the molding process .

以生物质稻秆为对象，采用石灰石作为催化剂对稻秆热解焦油进行催化裂解，由最小二乘支持向量机模型建立了生物质稻秆气化焦油催化裂解脱除过程的模型，并用遗传算法对模型参数进行了优化，得到了最佳的催化裂解温度和气相停留时间，使得焦油催化裂解率达到最高；以生物质木屑作为分析对象，对其进行热裂解脱焦，并依据最小二乘曲线拟合方法建立了生物质木屑气化焦油热裂解脱除过程的模型，用遗传算法对模型参数进行了优化，得到了最佳的热裂解温度和当量比，使得焦油含量达到最小。

Aimed at the thermal crack and breakdown caused by the excessive thermal load of nozzle of former spheric precombustion chamber for diesel engine 12V180, the theoretical analysis and experimental research are conducted in this paper.

针对 12V180柴油机原球形预燃室喷嘴因热负荷过大而产生热裂和断裂脱落的问题，进行了理论分析和实验研究，提出了一种新型的预燃室———超小型水滴形预燃室。

The research in hot cracking reguarity of directionally solidified Rene125 alloys proved again the theory about solidification contraction and its compensation.

对涡轮叶片材料Rene 125合金定向凝固热裂规律性的研究再一次验证了热裂纹形成的凝固收缩补偿理论。

The hot cracking theory about solidification contraction and its compensation was thoroughly proved through experiments carried out for Al-Cu alloys in semi-eontinutive directional solidification vaecume device.

根据热裂纹形成的凝固收缩补偿理论，定义了反映合金热裂倾向的不可补缩温度区间、热裂倾向系数、凝固末期收缩速率和不可补缩长度等指标。

The results show that with the increase of strain rate, the grain sizes of thermal simulation AZ31B alloys with different deformation all decrease; however, when other conditions are the same, the higher deformation will lead to the formation of the smaller grain size, and as the cooling intensity decreases, typical cast structure of AZ31B will appear. With the decrease of roll casting temperature, the dendritic size of roll casting AZ31B alloy sheet prepared by the same strain rate is also reduced, but with the increase of strain rate, the dendritic size of the alloy sheet prepared by the same initial roll casting temperature is decreased, and the tendency of dendritic streamline is strengthened. During the roll casting process of AZ31B alloy, rolling force should not be large, otherwise it will cause heat cracking.

研究结果表明：在不同应变量下，热模拟样品的晶粒粒度均随应变速率的增加而减小，而当其他条件相同时，变形量越大晶粒粒度越小，冷却强度降低，合金呈典型铸态组织；利用铸轧技术生产的AZ31B合金，当应变速率一定时，随着初始铸轧温度的降低，铸轧态板材的树枝晶粒度逐渐减小；而在初始铸轧温度一定时，随着应变速率的增大，铸轧态合金板材的树枝晶粒度也逐渐减小；而随着应变速率的提高，树枝晶沿轧向呈流线状排列的趋势增强；在AZ31B合金铸轧过程中，轧制力不能太大，否则容易引起热裂。

The above results provide reasonable mechanical model and parameters of molding sand for thermal stress field simulation and prediction of hot tearing during solidification.

这些结果为凝固热应力场数值模拟及热裂分析预测提供了合理的型砂力学模型和参数。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。