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1.
Conclusions
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| 1. | The eclogite dikes in low-greenschist facies epi-metamorphic volcaniclastic rocks in the Dabie Mountains areas show magma origin rather than tectonic melange or metamorphic origin. |
| 2. | Coesite and quartz pseudomorphs in the eclogite show that they were formed at the pressure of over 2.8 GPa and belong to ultrahigh pressure type. Therefore, there were high-pressure eclogite magma at deep crust depth. |
| 3. | From the country rock age of the low-grade metamorphic volcaniclastic rocks, we infer that the eclogite dikes were formed after the Sinian. |
2.
Conclusions
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| 1. | Over the past 8 000 years, notable changes in moist regime and temperature took place in Caohai District. The peat archives in this area recorded some hemispheric climatic events, such as three new ice ages and the Medieval Warm Period occurring in the northern hemisphere. This indicates that this area is sensitive to global changes. |
| 2. | Over the past 8 000 years, Caohai District is typical of the warm-moist—cool-dry climate. |
3.
Conclusions
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| 1. | The high-temperature pyrolysis reaction of cellulose and organic matter have an optimal reaction condition: 95°C, 4–14 mg cellulose, and 15–30 min. |
| 2. | Under the optimal condition, the formed CO or CO2, and the sample have the same λ18O value. It is unnecessary to recover oxygen from CO. |
| 3. | The data are accurate and reliable, and the operation method is simple and economic. |
4.
Huang Benwen 《武汉大学学报:自然科学英文版》1997,2(4):405-410
The characterization ofA
5 is obtained through the method of calculation. The main result is described as the following:
Supported by the Natural Science Foundation of Hubei Province
Huang Benwen: born in Oct. 1948, Associate professor 相似文献
| 1) | The order ofA 5 is one, two, three or five. |
| 2) | The element ofA 5 is divided into five conjugate classes. |
| 3) | There are fifty and nine subgroup inA 5 and we can obtain one produce element in every subgroup. |
| 4) | There are nine conjugate classes in the subgroup ofA 5. |
5.
Weiming Xu 《科学通报(英文版)》1997,42(4):282-282
Conclusions The results we obtained in the present investigations can be summarized as follows.
It can be concluded that the short-range chemical order plays a dominant role in this kind of magnetic order in this alloy.
Our results are favorable for the first picture given above which explains the mechanism of re-entrant spin glass behavior. 相似文献
| 1. | The sample is magnetically heterogeneous. Above Tc, the PM phase is dominant in the alloy. But in this temperature range, the M-Ba plot is still curved andthe external field dependence of the internal field was also observed in the in-field M?ssbauer measurements. It implies that there are magnetically coupled clusters in the sample. These clusters may behave superparamagnetically in the alloy. So they did not cause the change of the line width of the M?ssbauer spectra without external field. The magnetic moments of the clusters can be polarized by external field, which causes the curvature of M-Ba plot and the external field dependence of the internal field. |
| 2. | Below Tc, some PM phase persists down to 50 K at least. The clusters with very low Tc or even coupled antiferromagnetically at low temperatures are responsible for the PM phase in this temperature range. |
| 3. | At 50 K, the FM phase is dominant whereas some magnetic moments are coupled antiferromagnetically in the alloy. |
| 4. | At a freezing temperature of about 25 K, the re-entrant spin glass behavior can be observed in the alloy. |
6.
Conclusions
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| (1) | Based on strict kinetics of chemical reactions, MCT-GC method can provide detailed information for generation of organic components. Through computer, we can obtain the yield of the total hydrocarbon or individual component for any geological period under given gmlogical conditions by combining MCT-GC data with geological perameters, and apply them to basin modeling, petroleum prediction, and so on. |
| (2) | n-Alkanes with high molecular weights were generated very early due to their low activation energies, e. g. fig. 3 shows that almost 98% of C24 has been generated within 20 Ma, while only 1% of C12 was generated. |
| (3) | Because equipment condition was limited, kinetics of methane, which is one of the most important component in petroleum exploration, is not discussed in this note. Our further work will focus on kinetics of methane through a modified MCT-GC set. |
7.
Conclusions
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| 1. | Topologic analysis of representative Devonian graphoglyptids of China shows that a huge graphoglyptid clan can be grouped into three kinds of topologic configurations homeomorphic to line, tree and network, which correspond to foraging, probing feeding and the catching and feeding of constructing and inhabiting in anoxic, suboxic and dysoxic2) deep-water environments respectively. |
| 2. | It is well known that, in paleoecology and paleontology, morphologic features are bases of functional morphologic analysis of body and trace fossils, but, the features are not only Euclidean geometric, but also topologic and fractal geometric. In terms of the topologic graphoglyptids homeomorphic to line, tree and network, the functional morphologic analysis based on topologic configuration can reveal trace producer’ s ethology and ecological function mysteries contained in trace fossils from new aspects. |
| 3. | A functional topologic morphologic analysis first can get rid of interference of original biogenic traces to be subjected to compacting, diagenesis and deformation. In addition, it can simplify existing classification and naming system of ichnology, enrich and develop the theory and methodology of a functional morphologic analysis. |
8.
Conclusion According to the calculated results for the dissociation mechanism of C4H4O+, we come to a conclusion as follows:
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| (1) | Reaction (1) of C3H4 + formation and reaction (2) of CH2CO+ formation are both the processes involving three steps. The first and the second step of the reactions are the same. |
| (2) | The first step of H-transfer of the two reactions are the rate determining step, whose UMP2//6-31G barrier is 280.5 kJ · mol−1, which is comparable to the experimental value. |
9.
Conclusion
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| 1 | The dispersion capacity of MoO3 supported on CeO2 is 0.81 rnmo1/100 m2. For samples with MoO3 content is below the dispersion capacity, Mo6+ ions exist in the surface vacancies to form the surface Mo species, and the highly dispersed Mo6+ cations are coordinated by 7 oxygen ions based on the assumption that the CeO2(111) plane is preferentially exposed. |
| 2 | The differences of the dispersions between MoO3 on CeO2 and MoO3on ZnO-modified CeO2 indicate that the surface vacancies play an important role in the dispersion of MoO3. |
10.
Yanzhong Zhang 《科学通报(英文版)》1997,42(14):1218-1222
Conclusions
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| (1) | The newly developed nanocrystalline Fe72 Cu1Nb2V2Sil4 B9 and Fe72Cu1NblMo1-V2Si14B9 alloy still show the superior synthetical magnetic properties quite comparable with those of the early developed and typical Fe-Cu-Nb-Si-B alloys. Their cost has been reduced, the ductility of their amorphous ribbons is much better than that of Fe-Cu-Nb-Si-B alloys, and their ribbons can be folded back without brittleness. |
| (2) | In the range off = 20–2000 kHz and Bm = 0.05-0.6 T, the dependences of core loss on frequency and amplitude flux density can be expressed asPoc B2 mfn,n = 1.6-1.7. |
| (3) | In the range of f= 20–2000 kHz and (B m f) = (15−30) × 103 T·Hz, the approximate expression 1nP = [a(Bm,f) +b] (lnf)-n is tenable, wheren =0.2-0.3, and botha andb are constant. |
| (4) | The newly developed nanocrystalline alloys have been used in switching mode power supply with larger output power, unipolarity pulse transformer and precision current mutual inductor and clearly shown advantage. |
11.
Conclusions
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| 1. | It is a successful attempt to test and study O-Si stable isotopic composition of SiO2 shells of radiolarian of sediment core below the depth of 5 000 m in the Pacific Ocean because of lacking of calcium shells below CCD in ocean. The distribution and variation, from 21.2 X 10−3 to 34.5 × 10−3 for δ18OSMOW and from 0.2 × 10−3 to 1.2 × 10−3 for δ30SiNBS-28, have certain link with and difference from those of other oceanic organisms. |
| 2. | The relationship between δ18O and δ30Si values indicates obviously that the humeric distribution of core samples from No. 1787 station shows two groups separated by the depth of 160 cm. This distribution is also recorded by two kinds of isotopic curves (fig. 2(a), (b)), reflecting the evolutional difference of oceanic environment and stratigraphic sequence between the upper and lower layers separated by the depth of 160 cm. |
| 3. | Through a correlation of δ18O values, the core from No. 1787 station shows that since 27 Ma, the Pacific Ocean has experienced 7 cold/warm changes, accompanied by the frequent variations of global ice volume and sea level. |
12.
应用直流磁控反应溅射技术在不锈钢基体上制备Al2O3薄膜,研究了溅射气压、氧气流量和基体温度对Al2O3薄膜的沉积速率和膜基结合力的影响规律。结果表明,随着压力的增大,沉积速率和膜基结合力先增大后减小,在压力为1.0 Pa时最大;随着氧气流量的增加,沉积速率和膜基结合力也随之不断减小;随着温度的升高,沉积速率和膜基结合力略有下降。利用扫描电子显微镜观察了薄膜与基体界面及薄膜的表面微观形貌,薄膜与基体的结合性好,薄膜表面晶粒大小均匀,组织致密。 相似文献
13.
采用射频磁控溅射技术, 用氮气作为掺杂源, 在石英基片上生长N掺杂MgxZn1-xO薄膜, 并将薄膜分别在550,600,650,700 ℃真空中进行热退火处理. 结果表明: 晶体质量随退火温度的升高而提高; 薄膜中Mg和Zn的原子比发生了变化; Raman光谱中位于272,642 cm-1处的振动峰逐渐消失; 室温光致发光光谱中薄膜的紫外激子发射峰变强, 且发生峰移; 随着退火温度的升高, 薄膜的导电类型发生转变, 当退火温度为600 ℃时, 薄膜呈最佳的p型导电性质. 相似文献
14.
稀土掺杂铝酸锶长余辉薄膜制备方法的研究现状 总被引：1，自引：0，他引：1
稀土掺杂铝酸锶薄膜在长余辉夜视照明、无损实时可视化探测、机械应力传感器、纳米光电子器件、二维温度传感器以及薄膜太阳能电池等领域具有极为广阔、诱人的应用前景.要实现以上应用,首要条件是制备出质量高、性能优良的薄膜.因此制备稀土掺杂铝酸锶薄膜成为当今研究的热点.综述了国内外制备稀土掺杂铝酸锶薄膜的主要方法,包括射频磁控溅射法、溶胶-凝胶法、脉冲激光沉积法和激光熔蒸法,并重点介绍了射频磁控溅射法;另外对各种方法的优缺点进行了阐述. 相似文献
15.
在Nd2Fe14B稀土永磁体基体表面,采用磁控溅射（直流+射频）技术制备了Ti/Ni,Ti/Al和Al/Ni等二元合金薄膜和Ti/Al/Ni三元合金薄膜。并通过中性盐雾试验、腐蚀失重计算、电化学腐蚀试验、金相观察等方式,对比研究了不同表面处理对Nd2Fe14B稀土永磁体基体抗腐蚀性能的影响,并构建了腐蚀模型。研究发现：Ti/Ni,Ti/Al和Al/Ni等二元合金薄膜和Ti/Al/Ni三元合金薄膜均有效地提高了Nd2Fe14B稀土永磁体基体耐中性盐雾腐蚀和电化学腐蚀的能力;Ti/Al/Ni三元合金薄膜较Ti/Ni,Ti/Al和Al/Ni等二元合金薄膜有更优良的综合耐腐蚀性能,其磁控溅射工艺参数为：Ar流量60 sccm,基片温度常温,Ni,Al,Ti的溅射功率都为250 W,基片转速20 r·min-1,镀膜均速0.3 nm·s-1,总计溅射时间1 h。 相似文献
16.
17.
洪瑞江;徐淑华 《华南理工大学学报(自然科学版)》2010,38(6)
本文利用中频反应磁控溅射方法,以Zn/Al (98 : 2) (wt. %)合金靶为靶材,制备了综合性能优良的铝掺杂氧化锌（ZnO:Al, AZO）透明导电薄膜. 研究了沉积工艺对薄膜结构、电学及光学性能的影响,分析了AZO薄膜的刻蚀性能以及所制备的绒面结构特性. 结果表明：基体温度对薄膜生长有较大的影响,当温度为150℃时,薄膜具有较好的晶化率,晶粒呈明显的柱状生长,晶界间结合紧密,薄膜的电阻率为4.6×10-4Ωcm. 镀膜时基体的移动速度会影响薄膜的晶体生长方式,但对其沉积速率影响不大. 具有择优生长特性、形成柱状晶组织的薄膜经稀盐酸腐蚀后,其表面呈规则的粗糙形貌;此结构有利于充分捕集太阳光,从而提高薄膜太阳电池的效率. 相似文献
18.
在单晶Si(100)衬底以及经过改型处理的侧壁为Si(110)"V"型沟槽衬底上,分别采用液相沉积(LPD)和射频磁控溅射法(RF magnetron sputtering)制备了SrTiO3(STO)薄膜.通过对沉积溶液的温度、衬底的表面处理方法、衬底的放置方式以及热处理工艺的优化,研究了利用LPD法制备具有较为致密均匀的STO薄膜的条件;通过对溅射功率、溅射气压、衬底温度以及退火温度等具体参数的优化,研究了利用射频磁控溅射法在较低的衬底温度下制备具有一定取向的STO薄膜的条件.结果表明,射频磁控溅射法制备的STO薄膜在结晶状态、择优取向和表面形貌优于液相沉积. 相似文献
19.
利用磁控射频反应溅射方法制备了 ＺｒＯ２薄膜。分析了工艺对薄膜结构的影响，结构与摩擦学特征的关系。研究表明，氧分压和基片温度是影响薄膜结构，从而影响其摩擦学特性的关键因素。 相似文献
20.
设计一种特别的TiCoSb复合靶材, 通过调节各元素在复合靶材上所占面积的大小, 可以方便地调节薄膜的成分. 采用这种靶材, 利用直流磁控溅射和快速退火成功制备单一物相的多晶TiCoSb薄膜; 采用X射线衍射(X-ray diffraction, XRD)和原子力显微镜(atomic force microscopy, AFM)分析TiCoSb薄膜的结构和表面形貌; 利用Hall测试仪初步研究薄膜的电学性质. 结果表明, 所制备的TiCoSb薄膜对石英玻璃衬底具有良好的粘附力, 薄膜均匀致密. 经600 ºC, 5 min退火的TiCoSb薄膜的结晶质量较好, 薄膜的室温电导率为13.7 S/cm. 相似文献