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The electron-rich and sterically hindered ligand 9d provides the best enantioselectivities (up to 97.8 % ee) for various chalcones as the substrates.

其中富电子且空间位阻较大的配体gd对查耳酮类底物表现了最好的手性诱导能力,加成产物的ee值达到94.7一97.8%。

The essence of EDID is to set up a normal behavior fuzzy sub collection A on the basis of watching the normal system transfer of the privilege process, and set up a fuzzy sub collection B with real time transfer array, then detect with the principle of minimum distance in fuzzy discernmethodThe innovation point of this paper is : Put forward the method of EDID, can not only reduce efficiently false positive rate and false negative rate, also make real time intrusion detection to become possibility; have independent and complete character database, according to the classification of monitoring program, design normal behavior and anomaly behavior etc., have raised the strongness of IDS; Use tree type structure to preservation the character database, have saved greatly stock space; in detection invade , carry out frequency prior principle, prior analysis and handling the behavior feature of high frequency in information table, have raised efficiency and the speed of detection, make real time intrusion detection to become possibility; have at the same time realized anomaly intrusion detection and misuse intrusion detection, have remedied deficiency of unitary detection method.

本文的创新点是:通过对特权进程的系统调用及参数序列的研究,提出了基于Euclidean距离的入侵检测方法EDID,不仅能有效降低漏报率和误报率,而且使实时入侵检测成为可能;设计有独立而完整的特征数据库,根据被监控程序的类别,分别设计正常行为、异常行为等,提高了检测系统的强健性和可伸缩性;特征数据库按树型结构存储,大大节省了存储空间;在检测入侵时,实行频度优先原则,优先分析和处理信息表中的高频度行为特征,提高检测的速度和效率,使实时入侵检测成为可能;同时实现了异常入侵检测和误用入侵检测,弥补了单一检测方法的不足。

Secondly, by using the Sobolev inequality on the C-C spaces we prove a Fefferman-Phong type lemma. Based on which we provide nonexistence theorems to three kinds of nonlinear subelliptic parabolic equations through a relatively unified method.

其次,利用Carnot-Caratheodory空间上的Sobolev不等式证明了一个Fefferman-Phong型引理,并用比较统一的方法证明了三类非线性次椭圆抛物方程解的不存在性判定定理。

In Chapter 5,we obtain a boundedness results of commutators of convolution opera-tors on MK_~according to the corresponding boundedness of the sublinear operators on the homogeneous Morrey-Herz spaces.

第五章通过次线性算子在齐次Morrey-Herz空间上的有界性导出了一个卷积型交换子在MK_~上有界的结果。

The core of this thesis,which consists of the five chapters,discusses mainly the bound-edness on the homogeneous Morrey-Herz spacesdenoted by MK_(p,q~for some classes of higher order commutators which are generated by some common linear or sublinear op-erators.

本文共分五章,主要讨论了一些常见线性算子的高阶交换子在齐次Morrey-Herz空间MK_~上的有界性问题。

The contents of total organic carbon and humic acid carbon in the soil from stone pit were markedly higher than that of the soils from rocky ditch, swallet or stone cavern.

结果表明:喀斯特石漠化区阔叶林土壤有机总碳含量和腐殖酸碳含量明显高于灌木林、灌草丛和稀疏草丛,而土壤水溶性有机碳含量的变化则相反;喀斯特森林退化后,土壤有机碳的累积量减少、流失量增加;喀斯特小生境土壤有机总碳和腐殖酸碳含量存在明显的水平空间变异:石坑>石沟>石缝>石洞。

In the experimental study section, the rats were divided into four groups, including the normal control, the model, the Piracetam, the QPC, and copied to AD model. After the treatment, we observed the effects on the AD rats' ability of leaning and memorizing, detecting the TChE activity in whole blood and the expression levels of the related biochemical indicators of As includeing GFAP、NGF and BDNF of the AD rats' brain hippocampus, then compared the QPC with other groups to reveal the mechanism of action of the QPC treating AD to bright.

在动物实验部分,我们通过塑造AD动物模型,设立正常对照组、模型组、脑复康组和强脾益智胶囊组,观察强脾益智胶囊对AD模型大鼠空间学习记忆能力的影响,检测AD大鼠全血、海马匀浆液中乙酰胆碱酯酶活性和通过免疫组化的方法检测胶质纤维酸性蛋白、神经生长因子、和脑源性神经营养因子的表达情况来反映星形胶质细胞的增值情况,以期揭示强脾益智胶囊对AD的治疗作用机理。

Younger artists, for example Lee Kit, Magdalen Wong, Enoch Cheung, Hanison Lau, Hei Ng Ka Chun, Otto Li, Tozer Pak, Tang Kwok Hin and Lui Long Tin have all recently produced three-dimensional work that touches on the absurd, often with a subtle political and social commentary.

年轻的艺术家们例如李杰、黄颂恩、张康生、刘学成、吴家俊、李天伦、白双全、邓国骞和吕朗婷,最近都制作了触及荒谬性的三度空间作品,当中通常也都带有一丝细微的政治社会评论。

Hofmannsthal describes the transitoriness of the time and the space and asks for the meaning of the life.

霍夫曼斯塔描述了时间和空间的易逝性,并对人生的意义发出疑问。

We report the detection of gamma-ray emissions above 200 megaelectron volts at a significance level of 17sigma from the globular cluster 47 Tucanae, using data obtained with the Large Area Telescope onboard the Fermi Gamma-ray Space Telescope.

根据Fermi伽玛射线空间望远镜的大面积望远镜数据,我们报道对于球状星团47 Tucanae的伽玛射线发射的探测,Fermi的探测结果在200 MeV以上达到17sigma的显著性。

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Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气,收缩臀部肌肉;拱起身体,尽量抬起头来,右腿伸直朝向天花板(膝微屈,以避免肌肉紧张)。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化,但却比去年同期高8%。

However, to get a true quote, you will need to provide detailed personal and financial information.

然而,要让一个真正的引用,你需要提供详细的个人和财务信息。