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With respect to syntax, the roles of tagmeme in the structure of word and sentence and Chomsky's Generative-Transformational Grammar are discussed. The spatial relation theory and existing research achievements are investigated. Having noticed the shortage of the capability of topological and metrical relation in the description of spatial information structure, the author proposes Combinational Qualitative Geometry based on the two invariables under ordinary transformations, distance ratio and direction difference, the CQG-based spatial relation system between topological and metrical constraint is thus constructed, on which several spatial relations such as parallel, perpendicularity, co-linearity, sequence and direct neighborhood are derived. Based on extended theory of spatial relation, the language anamorphosis is analyzed from the aspects of phonetics, semantics and syntax. The mere geometric and formalized spatial relation is then integrated with concrete geographic ontology to accommodate richer and indicative spatial configuration of spatial information in the different geographic context. Finally a syntax framework for spatial information is put forward.
在语法结构方面,首先阐述了法位和法素在语法结构词法和句法中的地位和作用,以及Chomsky生成转换语法的核心内容;详细介绍了地理信息系统空间关系理论及现有的研究成果;在分析现有的拓扑关系和量度关系对空间信息结构描述能力不足的基础上,提出了基于长度比和角度差两个不变量的组合定性几何,以此建立了介于拓扑及量度约束之间的组合定性关系体系,并以此为基础派生出平行、垂直、共线、次序、直接邻近等空间关系描述;本文基于扩展的空间关系理论,详细讨论了空间关系在语音、语法和语义三个方面的语言变体,将纯几何和纯形式化的空间关系与具体的地理本体结合起来,可以获得更为丰富的、更能反映空间关系在不同语言上下文中具体体现的组合关系;最后给出了一个空间信息的语法结构的基本框架。
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Next, the change of chip breaking performance of indexable inserts of PVD-coated, CVD-coated carbides and ceramal at obviously increasing of cutting speed, and each of cutting and chip breaker parameters effecting on chip breaking performance of commonly used indexable inserts have been studied experimentally.
首先提出了接触图形法和切屑折断性模糊估计等新的研究方法,然后对几种易于折断的切屑形状及断屑槽型进行了分析和概括,并对切削速度明显提高以后涂层及金属陶瓷刀片断屑性能的变化、各切削参数对常用可转位刀片断屑性能的影响进行了试验研究。
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The transient air gap magnetic fields under different conditions are also calculated and analyzed. The novel finite element method directly using magnetic induction as unknown variable has many advantage. It is analyzed theoretically in detail. Nonlinear eddy current field equations and finite element equations using magnetic induction as unknown variable are developed.
直线电机的磁场是一非均匀、非线性的涡流场,文中对非均匀磁场及材料的非线性进行了分析,提出了相应的解决办法,采用以向量磁位为求解量的传统有限元法,对不同合闸角下筒式复合次级圆筒型直线感应电机的瞬态特性进行了计算与试验分析,对不同条件下瞬态气隙磁场进行了研究。
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This algorithm made the GA have certain memory function by importing a flag bit, consequently, it could search in the two subgroups respectively. At the same time, it was only one subgroup that adopted the elitist model. All these could increase the probability of convergence and ensure correctness of the result.
该算法通过在编码过程引入一个标志位,使遗传算子具有一定的记忆功能,从而分别对两个子群进行搜索,同时只对其中一个子群采用最佳个体保存法,提高了收敛的概率,保证了最终结果的正确性。
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The interpolate algorithms of three-order NURBS curve and double three-orders NURBS surface are presented. The expressions of partial derivative and normal curvature of NURBS surface are derived by the theory of differential geometry. The geometric characteristics of different curvature area of the free-form surfaces are analyzed in detail. All these work lays a theoretical foundation for constructing the cutter location calculating model of free-form surfaces NC machining. 2 On the basis of analyzing the methods of cutter path generation, the standard of evaluating the various methods of cutter path generation is presented. The method of generating cutter path with constant scallop height is presented for the first time.
本文以提高复杂曲面多坐标数控加工精度和加工效率为目的,在对国内外研究现状进行深入分析的基础上,对数控编程中各环节的关键技术问题进行了深入研究,主要内容包括以下几方面: 1 分析了复杂曲面各种造型方法的优缺点,给出了根据各种边界条件所确定自由曲面的NURBS表示方法以及三次NURBS曲线曲面反算算法;用微分几何理论推导了NURBS曲面的偏导矢及法曲率计算表达式;对曲面不同曲率特性区域的几何特征进行了深入分析,为建立复杂曲面的数控加工刀位计算模型奠定了理论基础。
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In the paper, the multidentate carboxylic acid ligands were used to combine with Cd, resulting in the three dimensional MOCPs single crystals—C12H16CdN2O8, with a low temperature hydrothermal synthesis method. The sample was characterized with IR spectra to affirm the organic groups in the frameworks, single-crystal X-ray diffraction to determine the crystal structure and composition of the frameworks, N2 adsorption isotherms at low temperature to measure the specific surface area and pore size distribution, and with TGA/DGA analysis to scale the thermal stability. Furthermore, the dissolution property and the photocatalytic activity of MOCPs under the ultraviolet ray condition were explored.
本文用低温水热合成法,用多齿羧酸配体异烟酸和Cd配位合成出[Cd(C6H4O2N)2(H2O)4]∞三维晶体并进行了表征:采用红外光谱法确认骨架中的有机官能团;用单晶X射线衍射分析法测定MOCPs的晶体结构,并确定其骨架的组成;通过低温氮气吸附等温线测定了其比表面积和孔径分布;以热重分析和差热分析测定材料骨架的热稳定性;测定了晶体的溶解性能;最后以亚甲基蓝为目标降解物,对[Cd(C6H4O2N)2(H2O)4]∞的光催化活性及亚甲基蓝的氧化动力学进行了探索(来源:A2444BC论文网www.abclunwen.com)。
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The 40Ar/39Ar geochronologic study indicates that with the ratio 40Ar/39Ar in atmosphere which changes with time,the time and strength of degassing of the earth can be probed,and that the 40Ar/39Ar dating method can help researchers study not only crust mantle evolution and the history of magma dynamics during the cooling process and granitoid emplacing, but also the hydrothermal ore deposit dating.
研究表明:可以通过大气中40Ar/39Ar比值随时间的变化窥探地球去气作用的时间和强度;40Ar/39Ar法不仅有助于研究岩浆冷却过程和花岗岩侵位机制等岩浆动力学的历史和壳幔演化,而且对研究热液成矿年龄也是很有效方法之一;在一定的地质条件下,沉积地层时代越老,40Ar/39Ar值越高;当今40Ar/39Ar年代法已为全球环境演变研究提供了一种强有力的工具。
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In this research, B2 gene of HCV was highly expressed as a fusion protein (Trx-B2) by cloning into pThioHisA, and induced specific anti-HCV antibody in higher titer than unmodified B2 protein after immunize mice or rabbit.The results showed antigen Trx-B2 has obvious immunogenicity and induced specific antibody,which might be able to serve as diagnosis HCV. Consequently, this PcAb of rabbit was used to coated Immulon plate, and a method of both antibodys sandwiching antigens was developed to detect 32 HCV positive serum and 32 nomal serum.Results show that ratio of positive are 87.5%and 43.75% respectively.
但缺点是该抗原所诱导的抗体滴度较低,可能是由于其分子量较小,所以本课题将人工合成的HCV复合多表位抗原基因B_2克隆到表达载体pThioHisA中,利用硫氧还蛋白融合方式对该抗原进行修饰,并在大肠杆菌中表达融合蛋白(Trx-B_2),纯化该蛋白后免疫小鼠及家兔,结果表明用硫氧还蛋白修饰后的融合蛋白免疫小鼠和家兔后,得到的抗体滴度均高于未经修饰过的复合多表位抗原合成肽所诱导的抗体滴度,并从免疫后的兔血清中提取IgG包被酶联板,利用双抗夹心法分别检测了32份HCV阳性血清和32份正常人的血清,结果阳性率分别为87.5%和43.75%,符合率为71.88%。
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The pairing correlation is treated by BCS method and the isospin dependent pairing forces have been used.
对关联的处理采用了BCS方法,并使用了与同位旋有关的对力常数,对不成对的核子采用了'阻塞法' ,并考虑了核的轴对称形变。
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While dealing with the vehicle routing problems with stochastic demands for each subsystem, in order to improve the cross-entropy algorithm's performance, an adaptive adjustment scheme was developed for the routes used to update Markov transition matrix in terms of the improvement level of quintiles.
对解决子系统随机需求车辆路径问题,为提高交叉熵法性能,对用于更新Markov转移矩阵的路径,设计了根据分位值改变大小的自适应调整方法。
- 推荐网络例句
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For a big chunk of credit-card losses; the number of filings (and thus charge-off rates) would be rising again, whether
年美国个人破产法的一个改动使得破产登记急速下降,而后引起了信用卡大规模的亏损。
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Eph. 4:23 And that you be renewed in the spirit of your mind
弗四23 而在你们心思的灵里得以更新
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Lao Qiu is the Chairman of China Qiuyang Translation Group and the head master of the Confucius School. He has committed himself to the research and promotion of the classics of China.
老秋先生为中国秋阳翻译集团的董事长和孔子商学院的院长,致力于国学的研究和推广。