变体

The results showed that plastic deformation at both -70℃ and 180℃ made the dislocation density of AISI304 stainless steel increase with the increase of deformation. Martensite phase transformation was induced for deformation at -70℃, whereas it was not at 180℃. As the dislocation density increased, the breakdown potential of AISI304 stainless steel's passive film became a little more positive. As martensite phase content increased, it became more negative and pitting corrosion resistance decreased.

结果表明：加热180℃和低温-70℃条件下塑性变形均使AISI304不锈钢中位错密度随变形量增大而增加，AISI304不锈钢在-70℃条件下塑性变形时部分奥氏体相转变为马氏体相，而在180℃条件下塑性变形时不发生马氏体相变；位错密度的增加使AISI304不锈钢钝化膜的击穿电位略微正移，而马氏体相的增加使击穿电位呈负移趋势，材料耐孔蚀性能降低。

The study has shown:(1) With increasing sediment depth and the woody giblets, the total organic carbon, the extraction of benzene , the total humic acids and the unhydrolyte are enhanced, while the hydrolyte is decreasing.(2) According to the GC-MS analysis, n-alkane,n-alkan-2-ones and n-alkanones are composed mainly of long-chains,such a result is thought to be characteristic of a herbaceous input from 2300a.B.P. n-alkanones exist in the samples may be considered as the evidence of microorganisms activity.(3) It is showed that the lipids is more sensitive to the climate change than the floristic. The proxy of the pollen spore of the peat stratum is different from the normal environment proxy. It is one of the main reasons that the sensitivity difference of the bog vegetation reacting to the climate isn't accordant with the log of the fat molecule fossil and biology fossil.(4) The transformation of the peat organic carbon is under the influence of temperature,acidity,organic material constituting, etc, and it showed the up-trend with the depth. In the short-term scale, the conversion of the peat organic carbon is effected by seasonal water,regional climate and vegetations; while in the long-term scale, it is controlled mainly by the climate.(5) According to the comparing the orderliness of organic compound,vegetation giblets with the depth to the characteristics of the peat molecule fossil with the section, in the development of this peatmire, 1500a B.P（210cm）is regard as the borderline of the late Holocene, the keynote of the front period is warm with several cold fluctuations, and the trend of the back period is dry and cold although there were several fluctuations.

研究表明：（1）随深度的增高及植物残体中木本残体的增多，总有机碳、苯萃取物、总腐植酸、不被水解物含量逐渐增高，而易水解物含量减少；（2）GC- MS分析显示，正构烷烃，直链烷基2-酮和正烷醇均以长链组分为主，揭示了该泥炭柱剖面2347a.B.P的母源输入以草本植物为主；甲基酮类和短链正烷醇的存在是微生物活性很大的生物证据；（3）通过有机分子标志物与孢粉、植物残体等指标的对比研究表明：脂类化合物对气候变化的反映要比植物种灵敏得多，不同沼泽植物对气候变化的敏感性的差异是脂类分子化石记录与生物大化石结果很难一致的主要原因之一；（4）泥炭有机碳的转化受到温度、酸度、有机物质组成等很多因素的影响，短时间尺度，泥炭有机碳的转化受季节性降水、地方气候和植被等因素的影响；长时间尺度，泥炭地有机碳的转化，受气候条件控制；（5）总结泥炭分子化石特征、泥炭有机质各组分含量及植物残体组成随深度的变异规律，分析结果显示该泥炭地层形成过程中，1500a B.P（210cm）可作为划分前后晚全新世的界线，前期的基调是气候偏暖，但又有几次偏干冷气候的反复，后期气候以干冷为主，其间虽有几次上升波动，但整体趋势不变。

And 0.4～0.6 respectively for the induction coil with round crosssection and rectangular cross-section; The magnetic flux density of coil made with round pipe was nonuniform, especially near the inner wall of coil turns that caused a fluctuation of electromagnetic pressure on the surface of liquid metal and had a bad effect for forming a sample with uniform cross-section and smooth surface; The system of screen and restraint magnetic field not only had an efficient effect on restraining the electromagnetic stirring and stablizing meniscus, also caused the conecial periphery of melt to be vertical; The position of top and S/L interface of melt had a direct effect on the meniscus shape. The meniscus profile varied from cone-shaped through column to cucurbituceous shape with the increase of top height or decrease of S/L interface.

对圆形截面、矩形截面感应圈来说D/H分别取0.7～1.1，0.4～0.6较为理想；对多匝感应圈来说，在匝间处存在漏磁，易引起熔体表面起伏不平，这种现象在用圆铜管绕制的感应圈中较为明显；屏蔽—抑流系统的加入可以消除电磁搅拌，使熔体稳定性增强，同时可使形态呈锥形的熔体侧面变得垂直成为理想形态；熔体上液面、固/液界面的选位直接影响成型形态，上液面升高，熔体形态经历锥形→柱形→葫芦形的转化，固/液界面下降则经历锥形→葫芦形的转变。

Involvement of central tegmental tracts produces ipsilateral olivary degeneration; that of dentate nucleus or superior cerebellar peduncle produces contralateral olivary degeneration.

累及背盖中央束导致同侧橄榄体退变，累及齿状核或小脑上脚导致对侧的橄榄体退变。

Acupuncture and moxibustion could recover obviously the allergic rhinitis patients' symptoms and signs, enhance the patients' ability to avoid the disease recurrency.

Th1细胞因子IFN-γ水平与常年性变应性鼻炎的症状、体征呈负相关，Th2细胞因子IL-4与常年性变应性鼻炎的症状、体征呈正相关。

But at relatively high temperatures, the alloy exhibits complete superelastic characteristics, and only one-step martensitic transformation is observed.

在较低的形变温度下，沿单晶母相［001］方向的压应力诱发的是两步马氏体相变，材料表现出赝弹性；在较高的形变温度下，只能观察到一步马氏体相变，材料展现出完全超弹性特性。

This transition can be regarded as one of the primary prototypes of few-body phase transitions, which are generally observed in thermodynamical systems with huge numbers of particles.

这一相变现象可以被看成是在多体系统中观察到的相变行为在少体系统中一个原始的体现。

Rheological behaviours have been investigated by means of Haake torque rheometer and AG-10TA universal testing machine. It has been showed that the melt viscosity of PVC/carboxylic ester rare earth salt compound is some greater than that of PVC/organotin mercaptide compound, which can not bring unfavourable consequences at the processing level.

用HAAKE转矩流变仪，AG-10TA万能材料试验机的流变装置对两种稳定剂与PVC的复合物的流变性能进行比较，发现羧酸酯稀土与PVC复合物的熔体粘度在相同实验条件下比有机硫醇锡与PVC复合物的熔体粘度略大，但不会带来加工上的困难。

Comparing with diploid, the growing rate of tetraploid plants was slow and leaves became bigger, thicker, dark green and crimpled. The stomata density of tetraploid plants was reduced, but the guard cell of stomata became bigger and the chloroplast number in guard cells was increased.

与二倍体相比，四倍体表现为：生长变缓；叶片增大、皱缩和变厚、叶形指数减小；叶片保卫细胞增大，气孔密度降低，叶绿体数目增加，叶色加深。

OBJECTIVES: To determine the effect of chlamydial infection at various ages on the development of allergic airway disease.

为了确定在不同年龄感染衣原体对变应性气道疾病发展的影响，作者采用新出生的和成年的BALB/c小鼠分别建立衣原体感染和卵蛋白激发的变应性气道疾病的小鼠模型。

I am accused of being overreligious," she said in her quiet, frank manner,"but that does not prevent me thinking the children very cruel who obstinately commit such suicide.""

客人们在卡罗利娜·埃凯家里，举止就文雅一些，因为卡罗利娜的母亲治家很严厉。

Designed by French fashion house Herm è s, this elegant uniform was manufactured in our home, Hong Kong, and was the first without a hat.

由著名品牌 Herm è s 设计，这件高贵的制服是香港本土制造，是我们第一套不配帽子的制服。