查询词典 algebraic fraction

In this study, hydrochloric acid was used to precipitate the casein from skimmed bovine colostrums to prepare acid whey which rich in immunoglobulin fraction and |3-Iactoglobulin fraction.

本研究采用简便易行的酸沉法去除乳中的酪蛋白，得到富含免疫球蛋白的乳清液。

Moisture content of all flour fractions was stabilized to about 12 percent before blending. Each soft wheat flour fraction was blended with each hard wheat flour fraction under various blending ratios (20:80, 40:60, and 80:20) and blending times (10, 20, 30, 40, 50, 60, 120, and 180 sec) in a drum mixer.

在混合之前，所有面粉块的水分含量保持在12%，每一种软麦粉块按不同混合比例和混合时间与一定的硬麦粉块混合在一个鼓形混合器中。

High-resolved X-ray diffraction measurements show that the crystal quality of high aluminum mole fraction(x=0.1) is poor and it may cause a large dark current. The window layer acts as a band-choice role. It induces a high responsivity and a wide response band for a higher aluminum mole fraction.

高分辨率X射线衍射仪对材料的测试结果表明，高铝组分(0.1)窗口层薄膜材料的晶体质量较差，导致暗电流增大，而其窗口层的窗口选择作用则可以得到较高的响应率和较宽的响应波段。

To make a comprehensive view of metapopulation researches, we folly analyze and summarize the present concepts, theories and models of metapopulation in this paper, which primarily includes the dynamical models and simulation approaches of single and competitive metapopulations. Based on the Levin's patch occupant model, the center framework of metapopulation researches, primary principles and mechanisms are discussed. First, Levins rule: the fraction of empty patch will remain constant with habitat destruction as long as metapopulation survives. This rule implies that empty patches have determinant effects on persistence and conservation. Second. Allee effect of metapopulation is incurred by establishing difficulties and dispersal costs, which is important to the studies of reserve area and the minimum available metapopulation size. Third, we analyze the rescue effect that immigrants can reduce the extinction risk of the presented local population. Rescue effect can leads to the improvement of metapopulation sustainability and the decrease of fraction of empty patches. Fourth, the coexistence mechanism of two competing metapopulation is discussed, which suggests that competition-colonization trade off may be prevalent in competing systems. Finally, extinction debt ob tamed from coexistence mechanism is given, which depicts the lost of species richness in the future for the current habitat destruction. After theoretical discussion, we present two popular simulated approaches in metapopulations: probability transition model and stochastic process model.

为了能总观集合种群进展的全局并开展进一步的工作，首先对集合种群的已有概念、理论和模型做了全面的分析和总结；其次对集合种群的发展和概念进行了探讨，以集合种群模型的中心框架：Levins的斑块占据模型为基础，展开对其它原理、效应和机制的探讨；主要包括了Levins原理，即当生境进到破坏时，空斑块比例在集合种群灭绝前保持不变，然后还分析了Allee效应（集合种群的Allee效应主要是由于建群困难和扩散损失造成的）；第三，分析了援救效应：迁人个体可以降低斑块中现有局域种群的灭绝风险，援救效应会增强集合种群的生存力，使空斑块比例下降第四，探讨了两竞争集合种群的共存机制，即竞争－侵占妥协，其共存机制为空间生境中物种共存提供了有力的理论解释。

Establishment of non-contact nanoscale measurement of local electrical properties (local charge and local electric field).The local electron concentration of N atom in Al_xGa_(1-x)N with different Al mole fraction were calculated and the concentration was found to increase with the increase of Al fraction.

利用第一性原理方法分别计算了不同Al组分的Al_xGa_(1-x)表面的N原子周围局域电子密度和相应的态密度，模拟不同电子密度N KVV论俄歇价电子谱主峰强度N_与次峰的N_的比值，发现了比值随电子密度的增加而线性增加的现象。

The pH increase resulted in formation of a higher fraction of granules with a smaller diameter and a si- multaneous decrease in the fraction of the larger gran- ules Fig.

pH值增加导致形成一个更高部分颗粒的直径更小的硅同步下降，部分规模较大的颗粒 ules （图4）。

Softs for the adsorption experiment were sieved into the sand-sized fraction and sfttand clay-sized fraction.

其中吸附实验又分成砂粒土壤和粘粒土壤2个粒级分别实验。

Moreover, the vanadium of oxidisable fraction in rhizosphere soils had best correlation with that in stem leaf and to root the acid soluble fraction was the best.

根际土中可氧化态钒与茎叶相关性最好，酸可溶态与根系相关性最好。

Among those lipids, crude soy-bean phosphatides are most powerful. Crude egg yolk phosphatides and its alcoholic insoluble fraction and sodium or ammonium oleates are also effective; whereas the alcohol soluble fraction of egg yolk phosphatidesi.e.

二在上述情况中，有效的脂類為大豆磷脂、粗製雞卵璘脂及其不溶於酒精的部分、油脂酸鈉和油脂酸銨等；溶於酒精的雞卵磷脂和油脂酸鉀，並無作用。

The efficiency of mass transfer in 60% fraction of hole is higher than in 40% fraction of hole. When gas/liquid ratio is lower 10, the efficiency of mass transfer in new sieve baffle tray is higher than in traditional tray.A three-dimensional quasi-single phase computational fluid dynamics program with the RNG- turbulence model is presented for evaluating the performance of the new sieve baffle tray. The special feature of this model is taking into account the influence of heat transfer during the mass transfer and the influence of mass transfer in computing the flow field.

建立了以RNG模型为基础的三维拟单相流模型，该模型与其它研究者所建立的模型的最大进步是，前人在塔板流场的计算中没有考虑传质的影响，并且在传质过程中没有也没有考虑传热对传质产生的影响，实际上在传质过程中，抛开传热来计算和研究传质是不准确的，因为在传质过程中伴随着传热，并且传热和传质是互相影响、互相制约的，本文所建立的传热与传质模型，把传热和传质进行了有效的藕合。

The shaping method of noncircular part and the tool holder's radial motion characters in noncircular turning process are discussed in detail in the thesis.

论文详细研究了非圆零件的成型方法和加工过程中刀架的径向运动规律。

I have not really liked him,I do not like his this kind of disposition.

我没有真的喜欢他，我不喜欢他的这种性格。