Objective To investigate the effect of artificial rupture in the latent phase on labor.
目的探讨潜伏期人工破膜对产程的影响。
Objective To investigate the outcome of labor analgesia at latent phase and its influence on mothers and fetus.
目的探讨潜伏期硬膜外分娩镇痛的效果及对母婴的影响。
Latent heat is absorbed or released whenever matter changes phase, as when matter changes from liquid to gas, for example, or from gas to liquid.
潜热在物质形态变化时被吸收或释放，例如当物质从液体变为气体或从气体变为液体时这一过程就会发生。
This paper studied experimentally the phase change temperature and latent of polyalcohols binary system with different component, and analyzed the feasibility of phase change wall.
通过实验研究了多元醇类相变材料组成的二元体系在不同组成下的储热性能，从材料的相变温度和相变潜热分析其应用于墙体中的可行性。
The results show that the phase change temperature of paraffin can vary with the constitution, and paraffin has larger phase change latent heat and no supercooling.
研究显示：石蜡的相变温度可根据组成进行调节，相变潜热大，无过冷现象，在多次吸放热后相变温度和相变潜热变化很小，稳定性好。
Using two methods of oxidation and graft to modification paraffin's performances, what was in order to widen paraffin's phase change temperature and improve its latent heat.
采用氧化和接枝两种方法对石蜡进行化学改性，以拓宽石蜡的相变温度范围和提高其相变潜热。
Solid liquid phase change latent thermal storage is commonly used.
固液相变潜热蓄热是通常采用的蓄热方式。
A specific enthalpy method associated with the alloy equilibrium phase diagram is employed to account for the latent heat of phase change.
对于潜热处理，采用了基于合金平衡相图的比热焓法；
The thermal properties of cool storage material include freezing and melting point, freezing and melting latent heat during the phase change process were investigated.
通过实验研究了空调蓄冷材料的凝固温度、融解温度、凝固潜热和融解潜热等热学性能。
Moreover, when the dosage of composite PCM is not enough, battery temperature increases first and then decreases with increase of porosity, when the phase change latent heat plays a dominant role.
复合相变材料用量不充足时，相变潜热占主导作用，增加孔隙率将使电池温度先增大后减小。
The second is latent heat, the energy required to effect a change in phase of a fluid, as in boiling or condensing.
第二类是潜热，即引起流体相变所需的热量，如沸腾和凝析。
Latent heat storage system based on phase change materials' (PCMs) melting and freezing is particularly suitable for solar energy heating, peak-shift of electrical demand and heat recovery.
基于相变材料熔化和凝固过程的相变潜热储能系统适用于太阳能加热、电力的‘削峰填谷’、热能回收。
The enthalpy method was employed to investigate the phase change process in a latent thermal energy storage(LTES) system using multiple phase change materials(PCMs).
采用焓法 ，分析了蓄能相变材料相变区比热特性对其蓄换热性能的影响。
The phase transformation latent heat is introduced into the analysis of temperature field during the hot forming process.
将热成形过程中的相变潜热引入温度场，并进行了有限元分析；
The enthalpy method was employed to investigate the phase change process in a latent thermal energy storage(LTES) system using multiple phase change materials(PCMs).
采用焓法对组合式相变材料（PCM）储热系统的相变过程进行了数值计算，分析了组合式相变材料中各个PCM组分质量分数的变化对系统储热性能的影响。
From the phase transition temperature and latent heat point of view, low-temperature solid-liquid PCM have a better prospect for industrialization.
从相变温度和相变潜热角度考虑，工业化前景较好的低温pcm均为固-液pcm。
From the phase transition temperature and latent heat point of view, low-temperature solid-liquid PCM have a better prospect for industrialization.
从相变温度和相变潜热角度考虑，工业化前景较好的低温pcm均为固-液pcm。
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