An index formula on eutrophic state evaluation of lakes based on particle swarm optimization

It proposes trophic value as a quantitative index of eutrophic state of water body.

提出了用营养值来定量描述水体的富营养状态；

Calculation of the driving force for nucleaction ( growth) gives an evidencs that the leading phase of the eutectoid reaction in hypoeutectoid steels is ferrite while that in hypereutectoid steels is cementite.

由形核（长大）驱动力的计算证明，亚共析钢共析反应的领先相为铁素体，而过共析钢的领先相为渗碳体。

When cooling, peritectic reaction between α-Mg and Zr happened in the Zn-rich area in the grains, while eutectic reaction and eutectoid reaction happened in grain boundaries.

冷却时，α-Mg与Zr在晶内富Zn处发生包晶反应，晶界处发生共晶反应和共析反应。

The scientific theory and method are applied to study the pearlitic eutectoid decomposition mechanism in steels and the concept of existence of so-called prevenient phase was negated.

应用系统科学的理论和方法，研究了钢中珠光体共析分解机制，否定了领先相的存在。

The dynamically mechanical properties of Zn 22% al alloys in eutectoid decomposition

Zn－22%Al合金共析转变的动态力学性质研究

The eutectoid decomposition is a self organization process, which is characterized by the integrated mechanism that ferrite and cementite acted as prevenient phase alternatively.

共析分解是个自组织过程，具有铁素体和渗碳体互为领先相的整合机制。

Above this point the hardness can be increased only slightly, because steels above the eutectoid point are made up entirely of pearlite and cementite in the annealed state.

高于此点，由于超过共析点钢完全由珠光体和退火状态的渗碳体组成，硬度增加并不多。

Besides, alloy steels containing elements which move eutectoid point to the left in Fe-C equilibrium diagram are also suitable for magnetic field quenching.

对于合金钢，凡是含有能使Fe-C状态图共析点左移的合金元素的钢均适用磁场淬火工艺。

Effect of high magnetic field on eutectoid point in Fe-0.76% C alloy

强磁场对Fe-0.76%C合金共析点的影响

Both the austenite-graphite eutectic reaction temperature and eutectoid reaction temperature are higher than those of austenite-cementite.

奥氏体-石墨共晶和共析反应温度也都高于奥氏体-渗碳体的共晶和共析反应温度。

However, the optimum second holding temperature in 2-step normalizing must be selected within the eutectoid temperature range.

但是，两阶段正火中，第二阶段的保温温度必须选择在共析转变温度范围内。

The results show that the catalytic cementation nitrocarburizing below the eutectoid temperature has a rapid penetrating rate and high hardness for the diffusion layer.

结果表明，在共析温度以下进行催渗氮碳共渗，具有渗速快、渗层硬度高的特点；

An introduction on Union Carbide Corporation Different spheroidizing technologies were applied to the hot-rolling ultra-high carbon steel by DET ( divorced eutectoid transformation).

联合碳化物公司利用离异共析原理，采用不同的热处理工艺球化热轧超高碳钢。

In this paper, the mathematical and physical model was developed based on the thermodynamics and solidification theory before the eutectoid transformation of spheroidal graphite cast iron occurred.

基于球墨铸铁发生固态相变之前的热动力学和凝固原理建立了数值模拟的物理数学模型。

These fine carbide particles grew during isothermal before the eutectoid transformation and their sizes depended on isothermal time and temperature;

这些弥散分布的碳化物颗粒在共析转变前的等温过程中长大，其尺寸由等温时间和等温温度控制。

Trends Dynamic Simulation of the Eutectoid Transformation of Nodular Cast lron

球墨铸铁共析转变组织的动态模拟

Morphology and high resolution image of eutectoid transformation products of ti-h alloys

Ti－H合金共析转变产物的形态和结构

With the increasing of aluminum content, the heat of eutectoid transformation reduces, while the melting point of alloy rises.

随着含铝量的增加，共析转变热减小；合金的熔点增加；合金的熔化热也增加，但增幅不大。

The eutectoid transformation temperature of five alloys is identical, being about 285C.

五种合金的共析转变温度基本相同，均在285℃左右，ZA50的共析转变热最小。

In specimens of eutectoid steel T8, the cementite lamellae may be plastically deformed to some extent, and its tendency increases with the decrease of interlamellar spacing.

对于完全是片层珠光体组织的T8钢，渗碳体片层表现出一定程度的塑性变形能力，并随片层间距的减小变形能力增强。