催化裂化柴油各馏分段碱性氮及总硫含量分布研究

对多家炼厂的催化裂化（FCC）柴油采用按体积切割馏分段的方式,对各个馏分段的碱性氮含量和总硫含量进行测试分析。结果表明,在FCC柴油中,总硫含量随着沸点的升高而升高,但碱性氮含量却随着沸点的升高而降低;以直馏柴油作对照实验,结果表明,在直馏柴油中,碱性氮和总硫含量都随沸点的升高而升高。在FCC柴油0％～60％（体积分数）的轻馏分段中集中了78．6％～86．9％的碱性氮,而在60％～100％（体积分数）的重馏分段中集中了49％～56％的硫化物。在FCC柴油中碱性氮主要集中在轻馏分,硫化物主要集中在重馏分。     

基层思想政治工作如何讲求规律性、针对性和创造性

基层思想政治工作必须结合生产活动的规律和特点,把握好规律性、针对性,注重创造性和时效性。做好基层思想政治工作要做到善于观察、分析、梳理,将工作时间和内容延伸到职工群众的日常工作和生活中;要创新工作内容、工作方法、工作机制,做到规范化、制度化和科学化。     

Image edge detection based on multi-fractal spectrum analysis

In this paper, an image edge detection method based on multi-fractal spectrum analysis is presented. The coarse grain H?lder exponent of the image pixels is first computed. then, its multi-fractal spectrum is estimated by the kernel estimation method. Finally, the image edge detection is done by means of different multi-fractal spectrum values. Simulation results show that this method is efficient and has better locality compared with the traditional edge detection methods such as the Sobel method. __________ Translated from Journal of Hunan University (Natural Sciences), 2004, 31(4): 28–33     

An improved convergence analysis for the Newton–Kantorovich method using recurrence relations

We generate a sequence using the Newton–Kantorovich method in order to approximate a locally unique solution of an operator equation on a Banach space under Hölder continuity conditions. Using recurrence relations, Hölder as well as centre-Hölder continuity assumptions on the operator involved, we provide a semilocal convergence analysis with the following advantages over the elegant work by Hernánde? in (The Newton method for operators with Hölder continuous first derivative, J. Optim. Theory Appl. 109(3) (2001), pp. 631–648.) (under the same computational cost): finer error bounds on the distances involved, and a more precise information on the location of the solution. Our results also compare favourably with recent and relevant ones in (I.K. Argyros, Concerning the “terra incognita” between convergence regions of two Newton methods, Nonlinear Anal. 62 (2005), pp. 179–194; I.K. Argyros, Computational Theory of Iterative Methods, in Studies in Computational Mathematics, Vol. 15, C.K. Chui and L. Wuytack, eds., Elsevier Publ. Co., New York, USA, 2007; I.K. Argyros, On the gap between the semilocal convergence domain of two Newton methods, Appl. Math. 34(2) (2007), pp. 193–204; I.K. Argyros, On the convergence region of Newton's method under Hölder continuity conditions, submitted for publication; I.K. Argyros, Estimates on majorizing sequences in the Newton–Kantorovich method, submitted for publication; F. Cianciaruso and E. DePascale, Newton–Kantorovich approximations when the derivative is Hölderian: Old and new results, Numer. Funct. Anal. Optim. 24 (2003), pp. 713–723; F. Cianciaruso and E. DePascale, Estimates of majorizing sequences in the Newton–Kantorovich method, Numer. Funct. Anal. Optim. 27(5–6) (2006), pp. 529–538; F. Cianciaruso and E. DePascale, Estimates of majorizing sequences in the Newton–Kanorovich method: A further improvement, J. Math. Anal. Appl. 322 (2006), pp. 329–335; N.T. Demidovich, P.P. Zabreiko, and Ju.V. Lysenko, Some remarks on the Newton–Kantorovich mehtod for nonlinear equations with Hölder continuous linearizations, Izv. Akad. Nauk Belorus 3 (1993), pp. 22–26 (in Russian). (E. DePascale and P.P. Zabreiko, The convergence of the Newton–Kantorovich method under Vertgeim conditions, A new improvement, Z. Anal. Anwendvugen 17 (1998), pp. 271–280.) and (L.V. Kantorovich and G.P. Akilov, Functional Analysis in Normed Spaces, Pergamon Press, Oxford, 1982; J.V. Lysenko, Conditions for the convergence of the Newton–Kantorovich method for nonlinear equations with Hölder linearizations, Dokl. Akad. Nauk BSSR 38 (1994), pp. 20–24 (in Russian); B.A. Vertgeim, On some methods for the approximate solution of nonlinear functional equations in Banach spaces, Uspekhi Mat. Nauk 12 (1957), pp. 166–169 (in Russian); Amer. Math. Soc. Transl. 16 (1960), pp. 378–382. (English Trans.).)     

塔里木盆地寒武-奥陶系碳酸盐岩油气藏形成条件

塔里木盆地寒武─奥陶系碳酸盐岩广泛分布,潜在资源量占塔里木盆地总资源量的一半以上,现已发现 五大类１０种类型的油气藏。从油气藏形成条件和油气形成及演化分析,认为塔里木盆地寒武─奥陶系单个碳酸盐 岩油气藏规模不大,多形成油气藏群,单井初产量高,普遍具凝析气顶,一般均属正常温度、压力系统,并具多期成 藏,被断裂改造的特点。油气藏分布受区域构造、储盖组合、断裂、优质烃源岩分布区控制。     

世界工业革命与能源革命更替规律及对我国能源发展的启示

迄今为止,人类社会一共发生过两次世界工业革命和三次能源革命。在已发生的两次世界工业革命中,能源更替是其主要的诱导因素。工业革命与能源革命之间有着一定的联系。在每一次工业革命发生之前,必然会有一次主导能源的变化、更替。随着工业化的快速发展,人类面临着化石能源日益减少的危机,以及环境污染越发严重等问题。相信在不久的将来,世界将迎来又一次能源结构的变革,这次变革将会引发第四次能源革命,并主导第三次工业革命。中国作为世界能源消费大国,在新一轮的能源革命中,也面临着机遇和挑战。优化能源结构、快速发展清洁、高效、低碳的新型能源以代替传统化石能源,才能在未来即将到来的工业革命中占领先机。     

Onr-partition designs in hamming spaces

The concept of the combinatorial matrix of an unrestricted code and the notion of anr-partition design admitted by a code are introduced and discussed in detail. The theory includes a characterization of completely regular codes, and a combinatorial interpretation of the fact that the distinct rows of the distance distribution matrix of a code are linearly independent. In general, it is possible to compute the distance distribution matrix of any code admitting a given partition design by solving a well-defined system of linear equations; this is an efficient technique provided the number of classes in the partition is relatively small.     

安化同心锑矿床矿化富集规律及找矿前景分析

同心锑矿床成矿地质条件优越,但以往研究程度相对偏低。为系统评价其找矿远景,通过矿床地质特征、矿化富集规律、找矿标志等分析研究,探讨了矿床成因,评价了找矿远景,为矿床开展下一步地质工作提供了依据。研究表明：①同心锑矿床矿体主要产于板溪群五强溪组下段灰色、灰绿色砂质板岩、粉砂质板岩、变质砂岩中,受F1断层上盘次级羽状构造控制;②矿体厚度品位变化较大,矿体在局部地段富集;③矿床物质来源具有多来源性,矿床成因类型为中温热液充填型矿床;④矿床成矿条件好,矿化明显,深部具有较好的找矿远景,可进一步开展矿产勘查工作。     

喇,萨,杏油田生产气油比变化规律

利用不同含水阶段石油，天然气化学组分监测资料，高压密闭取心资料，单井单层生产气油比资料以及水驱开采条件下生产气油比的数值模拟，从理论到实践对喇，萨，杏油田生产气油比的变化规律进行了系统的研究与总结。