化

Most of the China South Seas situated around the magnetic equator, belong to the low magnetic latitude area, where rocks are magnetized horizontally and the property of the Δ T is different with the other areas of Chinese Mainland.

我国的南海大部分海域位于磁赤道带附近，属于低磁纬度区域，以水平磁化为主，磁性体产生的Δ T 异常特征与中国大陆广大地区的Δ T 异常特征差别较大，且南北跨度大，达两千余公里，通常的化极技术在该区域很难取得良好的效果，虽然化赤方法在低纬度地区算法稳定，并通常能取得较好的结果，但是目前针对化赤异常的解释技术却相对较少；本文结合南海地区的航磁数据，对几种常用的化极技术进行了对比与分析，并对化赤技术进行了简要的介绍。

The method on trans fatty acids analysis in food is very important. The effects of methylate sodium, potassium hydroxide, sulfuric acid and boron trifluoride in methanol and their different concentration and dosage on TFA analysis were studied. The chromatographic condition and the influence of time and temperature on the esterifation of TFA using boron trifluoride in methanol were optimized. A method for analyzing TFA were established by GC based on boron trifluoride in methanol and RT-2560(100m×0.25mm×0.2μm) capillary column.

研究了甲醇钠－甲醇、氢氧化钾－甲醇、浓硫酸－甲醇和三氟化硼－甲醇4种甲酯化试剂的浓度、用量及甲酯化时间和温度对反式脂肪酸检测的影响，优化了色谱条件，建立了以三氟化硼－甲醇法甲酯化，RT-2560(100m×0.25mm×0.2μm)毛细管柱为基础的反式脂肪酸气相色谱检测方法，C18：1-9 t， C18：1-11 t， C18：2-9 t， 12 t和C22：1-13 t 4种反式脂肪酸的最小检出浓度在0.774.08 mg/kg之间。4种反式脂肪酸不同添标浓度回收率为98.44%101.23%，重复测定的相对标准差在0.22%1.31%之间，有较好的准确度和重现性。

In the last part, the paper appraises mortgage value using the former and improved capitalization rate respectively. Making using of the method of appraisal bias, the paper concludes that using the former capitalization rate results in overrating the appraisal result, while using the improved capitalization rate does not exist overrating problem. Based on that, the paper compares the former and improved capitalization rate from the following six aspects- mortgager, financial institution, appraisal institution, conservative principle of appraisal of mortgage, default risk, mortgage rate, and finally concludes that the improved capitalization rate is more scientific and accurate.

通过案例分析分别运用改进前后的资本化率进行评估，运用评估bias方法对评估结果进行研究，得出运用改进前的资本化率进行评估存在高估的现象，而运用改进后的资本化率进行评估则不存在高估的问题，在此基础上从抵押人、金融机构、评估机构、保守性估价原则、违约风险、抵押利率六个方面对改进前后的资本化率进行了系统的比较，得出改进后的资本化率更加科学精确的结论。

This thesis is divided into six parts. The first chapter is preface, the current status of research in the inverse problems for parabolic partial differential equations is reported; the second chapter is "regularization methods for numerical differentiation and their applications ", in this chapter we investigate many regularization methods from a viewpoint of regularization theory and algorithm, some applications in the inverse problems for parabolic partial differential equations are given; the third chapter is "spectral regularization methods". Based on Fourier analysis, within the framework of regularization theory, we apply the spectral methods to some ill-posed problems. Many numerical experiments are done in order to show the validity of the methods; the fourth chapter is devoted to wavelet dual least squares method and a revised wavelet method; in the fifth chapter,we combine finite difference method with method of lines and apply it to the backward heat conduction problem in time; in the sixth chapter "identification problems for unknown source ", the essence and the degree of two problems related to source identification are pointed out, at the same time, some numerical methods are reported.

本文分为六个部分，第一章前言简要分析了国内外抛物型偏微分方程反问题的研究现状；第二章数值微分的正则化及其应用从正则化理论和算法的角度出发，考察了许多正则化方法，还给出了数值微分在抛物型偏微分方程反问题的一些应用；第三章谱正则化方法是在Fourier分析的基础上，在一般正则化理论的框架下，给出了这种方法在各种不适定问题中的应用，数值实验表明谱方法是有效的；第四章研究了小波对偶最小二乘方法和改进的小波方法；第五章主要研究了有限差分方法结合线方法在时间反向热传导问题中的应用；第六章是未知源识别问题，主要指出了两类未知源问题的不适定程度和不适定本质，同时报告了一些数值方法。

The partial substitution of α-olefine sulfonate instead of alkylbenzene sulfonate and the production technology of α-olefine sulfonate were also described.

介绍近几年来大型磺化反应器和磺化装置的国产化及原有磺化装置的技术改造，α-烯基磺酸盐部分取代烷基苯磺酸盐及AOS生产技术，并概述了脂肪酸甲酯磺酸盐的产品开发、磺化产品的活性物干燥，以及其他磺化产品的开发等。

Phosphide liquid of normal temperature and dipping phosphide liquid are the latest developed products of our company.

常温磷化液常温磷化液和浸浴式磷化液，是我公司最新研制和开发的最新产品，常温磷化液主要针对没有系统加热条件，规模小的用户，同时也是磷化液技术发展趋势。

Because source data is unsteadiness, the changes of data must be spread to materialized view and make it be consistency the changes of materialized view and source data. Otherwise the freshness of data in materialized view will be fall down and the authenticity and consistency of OLAP will be affected. For the maintenance problem of materialized view, an algorithm is presented and it can make the cost of materialized view recomputation be minimized.

由于源数据的不稳定性，其数据的变化必须及时传播到实体化视图中，以保持实体化视图与源数据的变化一致性，否则会降低实体化视图中数据的新鲜度，并影响联机分析处理查询结果的真实性和有效性，针对视图的维护问题，提出了实体化视图的一种维护算法，它将使视图重计算代价最小化。

By studying the spectrum properties of coefficient matrix and the regular parameters at the iterative procedure of the first class regular method , we assign a uniform parameter for the inner iteration . Simulation results show that this method for choosing regular parameter is correct and the outer iterate convergence for high contrast object.

这两种方法的正则化效果取决于迭代的次数，我们通过对静态正则化方法中逆散射方程系数矩阵的谱特性、正则化参数等进行分析，对这类迭代正则化方法选取了统一的正则化参数，使得外部迭代方法收敛。

In this paper, method which using alkali to reticulate polyurethane foam was studied and got the sample of reticulated PU foam.

研究了碱法网化工艺制备聚氨酯泡沫的配方及工艺参数，并对不同配方及工艺条件制备的网化泡沫进行了性能测试，分析了网化工艺对网化泡沫性能的影响，优化了配方，并对网化效果进行了评

Results According to articulation position, 68.44% of misarticulations of functional speech disordes occurred in dental consonants; while 57.78% in palatal consonants; 23.11% in alveolar consonants; 24% in velar consonants; 14.67% in lateral consonant and 17.33% in retroflex consonants. According to speech pathology, 37.33% of misarticulations was palatalized misarticulation; while 22.67% lateral misarticulation; 21.33% inter-dental misarticulation; 8% palatalized misarticulation with lateral misarticulation; 5.33% lateral misarticulation with interdental misarticulation; 1.33% nasopharyngeal misarticulation and 4% others.

结果 功能性异常语音的异常语音出现率按构音点分：舌尖前音(68.44%)、舌面音(57.78%)、舌尖后音(23.11%)、舌根音(24%)和舌尖中边音(14.67%)、舌尖中音(17.33%)，它们可单独出现，也可两种异常音并存；按语音病理学分类：腭化音占37.33%、侧化音占22.67%、齿间音占21.33%、腭化音+侧化音占8%、侧化音+齿间音占5.33%、鼻腔音占1.33%、其它占4%。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。