偶奇阶幻方的一种公式构造法

作者在文献中提出偶奇阶幻方的一种公式构造的猜想.本文用严密的计算并证明了这个猜想是对的.从而全部解决了任意阶幻方的公式构造法.     

安道什猜想推广的全相等正奇数解问题

本文研究了安道什猜想推广问题，并给出了其全相等正奇数解的公式。     

素数分布三组递推公式的初等证明

在研究素数分布过程中,作者基于创立一种新的筛法（p＃筛法）,并根据极限存在准则以及等价量的性质,给出了估算π(x)、π2(x)和D(x)三组递推公式的初等证明.而估算素数间隙的两个公式、孪生素数猜想及Goldbach猜想等是其中的推论.     

3N+1猜想的压缩迭代及ta(n)与 tc(n)的关系

提出了3N 1猜想的压缩迭代，给出了该迭代下的某些结果，这些结果是：关于3N 1猜想的3个等价命题；叙拉古阶序列；n的项公式及证明；关于系数停止次数tc(n)与足够停止次数ta(n)相等的两个定理，3N 1猜想的压缩迭代的提出对该问题进一步研究将发挥重要作用。     

关于等幂和的简捷递推公式

等幂和S m(n)=1 m+2 m+…+n m是一个古老的难题,在G.Giuga猜想等数论问题的研究中有着重要的作用.本文获得了等幂和的两个简捷递推公式,从而改进了陈景润与黎鉴愚的结果.利用这些递推公式可以很快循环地获得等幂和公式,并且给出了第31～40个等幂和公式.     

系综理论教学中的探究方法

利用类比和猜想等科学探究方法,导出了三种统计系综的配分函数和热力学公式.     

连续自然数幂的二项分解

对根据新定义的二元方数,结合组合数导出连续自然数n次幂的二项分解,从而得出连续自然数n次幂的二项分解公式,并利用其探究了波文猜想。     

关于等幂迭乘和猜想的证明

等幂迭乘和Rm(n)=n↑∑↓k=1 k^mCn^k是一个有趣的问题，曾有许多人进行了研究．本文获得了等幂迭乘和公式的5种计算方法及其深刻性质，从而简洁地证明了赵建林猜想及王云葵猜想；并获得了等幂迭乘和与Stirling数密切关系式。     

多面体欧拉定理的另一种推广——兼欧拉示性数本质探讨

本文指出欧拉示性数2实际是1，并把多面体歌拉公式推广到有限个点线面、体综合体都适用，示性数1本质是指n维几何系统所在空间的唯一性，并提出n维几何系统统一公式的猜想．     

关于伪素数的对偶公式簇

伪素数与绝对伪素数在Lehmer猜想及G.Giuga猜想等数论问题的研究中有着非常重要的作用.本文通过推广费尔马数与默森尼数,获得了伪素数的判别方法及两类伪素数的对偶公式簇.     

无粘结部分预应力混凝土梁极限状态可靠度分析

通过分析影响无粘结部分预应力混凝土梁极限状态性能的主要因素，采用已收集到的１０６根梁的试验数据，并充分考虑各参数的不定性，对无粘结部分预应力混凝土梁的极限强度进行了可靠度分析，给出了计算无粘结筋极限应力增量与梁的极限强度设计建议公式。     

Polypeptide ligation occurs during post-translational modification of concanavalin A

Lectins are proteins with multivalent carbohydrate-binding sites, which confer the ability to agglutinate. The seeds of legumes are particularly rich in lectins, for example, concanavalin A (Con A) comprises up to 15% of the protein in the cotyledons of jack bean (Canavalia ensiformis) seeds. The amino acid sequences of Con A and several other legume lectins have been partially or fully determined, and comparison of these sequences from different species reveals a circular homology (Fig. 1A); rearrangements within the genome have been suggested to explain this. We report here that the circular homology displayed by Con A is due to a post-translational transposition and ligation within the initial polypeptide. This type of modification has not been reported previously for eukaryotes, although it has been suggested to occur in bacteriophage lambda.     

Avian sarcoma virus-transforming protein, pp60src shows protein kinase activity specific for tyrosine

The protein responsible for malignant transformation by avian sarcoma viruses (ASVs) has been identified as a phosphoprotein of molecular weight 60,000 designated pp60src (refs 1--4). It has been suggested that this protein has a functional role in cellular transformation involving the phosphorylation of cellular proteins, for it was discovered that specific immunoprecipitates from ASV-transformed cells that contain pp60src catalysed the transfer of phosphate from [gamma-32P]ATP to the heavy chain of rabbit immunoglobulin. Additional studies involving the cell-free synthesis of the ASV src protein further demonstrated that the presence of the src polypeptide correlated with that presence of a phosphotransferase activity. Our studies, involving the biochemical purification of this protein, have demonstrated that the ASV-transforming gene product, pp60src, is itself a protein kinase. We have purified the pp60src protein approximately 5,000-fold using either conventional ion-exchange chromatography or immunoaffinity chromatography. The resultant partially purified preparations contain a cyclic AMP-independent protein kinase activity. We report here that the soluble phosphotransferase activity of partially purified pp60src results in the phosphorylation of exclusively tyrosine residues in a variety of proteins that serve as substrates.     

Direct growth of single-walled carbon nanotubes on substrates

As one of the most promising candidate material for next generation electronic devices, the reliable and controllable synthesis of high quality single-walled carbon nanotubes (SWNTs) has long been an essential and important issue in the field. Direct growth of SWNTs on flat substrates by chemical vapor deposition (CVD) process is the best way to obtain SWNTs because it is immediately ready for building nano-devices. The orientation of the SWNTs has been well controlled by gas flow or substrate lattice during the CVD growth process. The chirality and structure control of SWNTs is still a big challenge. However, the conductivity selective growth has already partially succeeded. New catalysts have been explored to obtain SWNTs of higher quality. Along with the further progress in the study of the SWNT growth, the precise control over the orientation, position and conductivity of SWNTs is expected to meet the requirements of carbon-based nanoelectronics.     

破碎机齿板应力变形有限元仿真研究

应用机械结构有限元仿真方法,对颚式破碎机齿板的应力和变形进行了仿真研究,通过对仿真结果的分析,认为齿板应力和变形仿真能够部分反映其真实受力状态.     

局部自增强厚壁筒中非对称裂纹的应力强度因子

虽然已有许多文献给出了厚壁筒多条裂纹应力强度因子的计算方法和计算公式,但还没有见到关于局部自增强厚壁圆筒中压缩残余应力引起的多条非对称裂纹应力强度因子的文献发表,本文推导了用权函数法计算这种裂纹的应力强度因子的计算公式,借助于已经发表的其它载荷情况下的有限元结果,对一个大的裂纹几何参数根据权函数公式计算了其应力强度因子,可供从事这方面工作的工程技术人员参考。     

Local Structure of Ge／SI（100） Self—Assembled Quantum Dots

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部分相干涡旋光束在湍流大气中的相干性

根据广义的惠更斯-菲涅耳原理,得到了部分相干涡旋光束在湍流大气中传输时光谱相干性的理论表达式,然后详细研究了光束在湍流介质中传输时相干性的变化规律。研究表明,部分相干涡旋光束通过湍流介质后,光束的相干性主要受到湍流扰动强弱和光束所带的拓扑电荷数多少的影响,而与光源本身的相干性无关。光源所带的拓扑电荷数越多,光束的相干性越差;湍流扰动越强,光束的相干性越好。     

Local Structure of Ge/Si(100) Self-Assembled Quantum Dot

Local structure of uncapped and Si-capped Ge quantum dots grownon Si(100) has been probed by X-ray absorption fine structure spectroscopy. It is found that the uncapped Ge dots are partially oxidized and partially alloyed with Si. The amount of Ge present in the Ge phase is found to be about 20-30%. In the Si-capped sample, Ge is found to be dissolved in silicon, the fraction of Ge atoms existing as pure Ge phase being not more than 10%.     

基于确定性力学的破碎机齿板应力和应变有限元仿真研究

应用确定性力学方法,对齿板应力和应变进行了有限元仿真研究,通过对仿真结果的分析,认为基于确定性力学的齿板应力和应变仿真只能部分反映其真实受力状态,齿板类零件在有限元仿真中的载荷施加方法应进一步研究,以真实地反映齿板在实际工况下的受力情况．