On-line Cutting Quality Recognition in Milling Using a Radical Basis Function Neural Network

Tool wear, chatter vibration, chip breaking and built-up edge are main phenomena to be monitored in modern manufacturing processes, which are considered as important factors to the quality of products.They are closely related to the cutting parameters, which are to be selected in manufacturing process.However, it is very difficult to measure directly the cutting quality based on on-line monitoring.In this study, the relationship between the cutting parameters and cutting quality is analyzed.A Radical Basis Function (RBF) neural network based on-line quality recognition scheme is also presented, which monitors the level of surface roughness.The experimental results reveal that the RBF neural network has a high prediction success rate.     

A 160-kilobit molecular electronic memory patterned at 10(11) bits per square centimetre

The primary metric for gauging progress in the various semiconductor integrated circuit technologies is the spacing, or pitch, between the most closely spaced wires within a dynamic random access memory (DRAM) circuit. Modern DRAM circuits have 140 nm pitch wires and a memory cell size of 0.0408 mum(2). Improving integrated circuit technology will require that these dimensions decrease over time. However, at present a large fraction of the patterning and materials requirements that we expect to need for the construction of new integrated circuit technologies in 2013 have 'no known solution'. Promising ingredients for advances in integrated circuit technology are nanowires, molecular electronics and defect-tolerant architectures, as demonstrated by reports of single devices and small circuits. Methods of extending these approaches to large-scale, high-density circuitry are largely undeveloped. Here we describe a 160,000-bit molecular electronic memory circuit, fabricated at a density of 10(11) bits cm(-2) (pitch 33 nm; memory cell size 0.0011 microm2), that is, roughly analogous to the dimensions of a DRAM circuit projected to be available by 2020. A monolayer of bistable, [2]rotaxane molecules served as the data storage elements. Although the circuit has large numbers of defects, those defects could be readily identified through electronic testing and isolated using software coding. The working bits were then configured to form a fully functional random access memory circuit for storing and retrieving information.     

聚氨酯树脂应用及研究

就聚氨酯树脂的应用现状进行综述，着重概括聚氨酯在泡沫、弹性体。涂科、合成革、胶粘剂和弹性纤维等方面的应用情况，并介绍目前国内外的研究进展。     

Reestablishment of the inactive X chromosome to the ground state through cell fusion-induced reprogramming

The restricted gene expression pattern of a differentiated cell can be reversed by fusion of the somatic cell with a more developmentally potent cell type, such as an embryonic stem (ES) cell. During this reprogramming process, somatic cells obtain most of the characteristics of pluripotent cells. Reactivation of an inactive X chromosome (Xi) is an important epigenetic marker confirming the pluripotent reprogramming of somatic cells. Female somatic cells contain one active X chromosome (Xa) and one Xi, and following the fusion of these cells with male ES cells, the Xi becomes activated, resulting in XaXaXaY fusion hybrid cells. To monitor Xi reactivation, transgenic female neural stem cells (fNSCs) carrying a green fluorescent protein (GFP) reporter gene expressed on the Xa (X-GFP), but not on the Xi, were used for reprogramming. XaXi^GFP NSCs, whose GFP reporter was silenced, were fused with HM1 ES cells (XY) to induce pluripotent reprogramming. The Xi^GFP of NSCs were found to be activated on day 4 post-fusion, indicating reactivation of the Xi. Hybrid cells showed pluripotent cell-specific characteristics cells including inactivation of the NSC marker Nestin, DNA demethylation of Oct4, DNA methylation of Nestin, and reactivation of the Xi. Following differentiation of the (GFP-positive) hybrid cells through embryoid body formation, the proportion of GFP-negative cells was found to be approximately 26?%, indicating that there was random inactivation of one of the three Xas. Here, we showed that the Xi of somatic cells is reprogrammed to the Xa state and that cellular differentiation occurs randomly, i.e., regardless of the Xa or Xi state, indicating that the memory of the Xi of somatic cells has been erased and reset to the ground state (i.e., inner cell mass-like state), indicating that random X-chromosome inactivation occurs upon differentiation.     

燕雀发声核团体积与睾丸体积相关性的研究

利用组织方法及微机处理技术测量了成年鸣禽燕雀（ Ｆｒｉｎｇｉｌｌａ ｍ ｏｎｔｉｆｒｉｇｉｌｌａ）发声相关核团 Ｈ Ｖｃ、 Ｒ Ａ、 Ｘ 区与发声无关核团 Ｓｐ Ｍ （螺旋内核）及睾丸的体积。结果表明，发声相关核团 Ｈ Ｖｃ、 Ｒ Ａ、 Ｘ、区的体积与睾丸的体积变化具有明显的正相关，而发声无关核团 Ｓｐ Ｍ 与睾丸体积变化相关不明显     

刺激承山穴引起循膀胱经的神经源性炎症反应

实验使用大白鼠，由颈静脉注射Ｅｖａｎｓ蓝溶液，同心针电极刺激承山穴，照像记录皮肤Ｅｖａｎｓ蓝的渗出，测定皮肤、内脏Ｅｖａｎｓ蓝含量（ｎ＝１２）．实验证明，在刺激侧爪外侧缘，小腿和大腿背侧，腰骶椎及胸椎皮肤出现沿足太阳膀胱经循行的、点状形式的蓝线反应，对侧小腿及大腿对称部位也有少量蓝点渗出．结果呈现具特征性的沿躯体纵向的点状蓝反应，点连线与足太阳膀胱经循行吻合．这些部位皮肤Ｅｖａｎｓ蓝含量与其周围皮肤有显著性差异（Ｐ＜０．０５）．膀胱和卵巢（睾丸）也出现蓝色渗出，与空肠和降结肠相比Ｅｖａｎｓ蓝含量也有显著性差异（Ｐ＜０．０５）．结果表明，神经源性炎症反应可作为经脉显示的标志，电针刺激穴位可引起特定经脉的呈现，证明了经脉的存在，并有其神经生理学基础．实验还证明经脉与有关脏腑的相关．     

模运算及求最大公约数的增广PETRI网模型

本文同时给出了模运算和求最大公约数的两个增广Petri网模型,然后给出了矩阵描述和状态方程分析,最后导出了已知输入值求输出值的算法。