汉语中"的"字短语右边界的识别

“的”字是现代汉语中的高频词．“的”字的作用主要是用来构成短语,我们称之为“的”字短语,它是现代汉语中最常见的短语．“的”字短语造成了汉语句子中丰富的层次和复杂的语义结构．汉语句子中很多的歧义结构也是由“的”字短语引起的．因此正确地分析“的”字短语的结构对于汉语句法分析和汉语理解是很重要的．要分析“的”字短语的语义结构必须首先识别出句子中的“的”字短语．当然,当“的”字以词的形式出现在句子中时,这个句子中就出现了一个“的”字短语．可是这个“的”字短语的右边界在那里呢？如何让计算机能够正确地识别出它的右边界呢？这个问题却迄今未见有文献涉及．该文对此进行了研究并提出了研究交提出了识别“的”字短语边界的算法．     

关于旋转锥面与球面相交的研究（Ⅱ）

对本人已研究得出的曲线（ｘ２ ＋ ｙ２ － ２ｒｘ＋ ｐ）２ － Ｌ２（ ｘ２ ＋ ｙ２） ＝ ０ 的主要性质、焦点数目、焦点的分布规律,曲线的几何形成方法以及本曲线在工程上的应用等进行了较详细的研究,为工程上应用本曲线提供了理论依据     

颗粒分布对金属基复合材料激光热冲击破坏的影响

从宏观和微观两方面研究了ＳｉＣ颗粒分布状况对陶瓷颗粒增强金属基复合材料激光热冲击破坏的影响,发现微裂纹形成是由基体内的孔洞和颗粒与基体脱胶所引起,而陶瓷颗粒分布不均匀对裂纹的扩展机理有重要影响,它大大降低了复合材料的宏观力学性能     

Genomic instability in Gadd45a-deficient mice.

Gadd45a-null mice generated by gene targeting exhibited several of the phenotypes characteristic of p53-deficient mice, including genomic instability, increased radiation carcinogenesis and a low frequency of exencephaly. Genomic instability was exemplified by aneuploidy, chromosome aberrations, gene amplification and centrosome amplification, and was accompanied by abnormalities in mitosis, cytokinesis and growth control. Unequal segregation of chromosomes due to multiple spindle poles during mitosis occurred in several Gadd45a -/- cell lineages and may contribute to the aneuploidy. Our results indicate that Gadd45a is one component of the p53 pathway that contributes to the maintenance of genomic stability.     

Dissociation of dopamine release in the nucleus accumbens from intracranial self-stimulation

Mesolimbic dopamine-releasing neurons appear to be important in the brain reward system. One behavioural paradigm that supports this hypothesis is intracranial self-stimulation (ICS), during which animals repeatedly press a lever to stimulate their own dopamine-releasing neurons electrically. Here we study dopamine release from dopamine terminals in the nucleus accumbens core and shell in the brain by using rapid-responding voltammetric microsensors during electrical stimulation of dopamine cell bodies in the ventral tegmental area/substantia nigra brain regions. In rats in which stimulating electrode placement failed to elicit dopamine release in the nucleus accumbens, ICS behaviour was not learned. In contrast, ICS was acquired when stimulus trains evoked extracellular dopamine in either the core or the shell of the nucleus accumbens. In animals that could learn ICS, experimenter-delivered stimulation always elicited dopamine release. In contrast, extracellular dopamine was rarely observed during ICS itself. Thus, although activation of mesolimbic dopamine-releasing neurons seems to be a necessary condition for ICS, evoked dopamine release is actually diminished during ICS. Dopamine may therefore be a neural substrate for novelty or reward expectation rather than reward itself.     

A novel genome-wide fulllength kinesin prediction analysis reveals additional mammalian kinesins

Kinesins are microtubule-based motor proteins that perform diverse functions[1―6], including the transloca- tion of vesicles, organelles, chromosomes, proteincomplexes, RNA-binding proteins (RNPs), etc. They also help to orchestrate microtubule dynamics …     

液压阀阻力控制分析方法

本文提出的分析方法是建立在阻力控制原理的基础之上，利用液压阀内部各种液阻之间的联接和控制关系，分析液压阀的工作原理和压力流量特性，并能定量计算特性曲线，用以指导液压阀的正确设计。     

测井资料分析系统接口电路设计

从一种超声模拟测井记录的井下信号、深度信号送微机处理的实际要求出发，分析井下信号数据采集的工作原理，阐述了与１２位Ａ／Ｄ转换器实时配套工作的双存储体工作时序。通过对深度信号的解调，提出了一种解决４ＦＳＫ解调的有效方法。     

Effect of actinomycin D on Trypanosoma cruzi

Viable metacyclic forms of T. cruzi, Y strain, treated with an adequate dose of actinomycin D (50 micrograms Act-D/ml/10(7) parasites/ml for 72 h at 28 degrees C) showed the following properties: 1) they lost their ability to replicate in culture medium, in blood and in tissues of normal mice and were no longer able to incorporate tritiated thymidine; 2) they could not penetrate into Vero cells and could not replicate inside normal macrophages; 3) they retained their immunogenicity and the ability to protect mice against a virulent infection; 4) they did not induce histological lesions as described in chronic experimental Chagas' disease.