Noncoding RNAs: Different roles in tumorigenesis

A major portion of the mammalian genome is transcribed to produce large numbers of noncoding RNAs(ncRNAs).During the past decade,the discovery of small RNAs,including the microRNAs(miRNA) and small interfering RNAs(siRNA),has led to important advances in biology.The breadth of the ncRNA field of study has substantially expanded and many recent results have revealed a range of functions that can be attributed to the miRNAs and other ncRNAs.For example,H19 RNA,HOTAIR RNA,transcribed ultraconserved regions(T-UCRs),natural antisense RNA,transfer RNA and mitochondrial noncoding RNA have been suggested to play important roles in cancers and other diseases as well as in diverse cellular processes.In this review,we focus on the current status of several classes of ncRNAs associated with cancer with the emphasis on those that are not microRNAs.     

A fast pseudorandom number generator with BLAKE hash function

This paper presents a fast pseudorandom generation algorithm, which is based on the BLAKE hash function and can pass the random test of the NIST (National Institute of Standards and Technology) Statistical Test Suite. Through theoretical analysis and experimental imitation, our new algorithm is proven to be more secure and efficient than G-SHA1. Simultaneously, we introduce and discuss the BLAKE in detail. Its security shows that can be utilized to generate pseudorandom bit sequences, which the experimental results show the BLAKE hash function has excellent pseudorandomness. Therefore, we believe the BLAKE is one of the most potential candidate algorithms of SHA-3 program.     

NECESSARY AND SUFFICIENT CONDITION FOR GLOBAL CONTROLLABILITY OF A CLASS OF AFFINE NONLINEAR SYSTEMS

In this paper, we investigate the global controllability of a class of n-dimensional affine nonlinear systems with n- 1 controls and constant control matrix. A necessary and sufficient condition for its global controllability has been obtained by using the methods recently developed. Furthermore, we generalize the above result to a class of affine nonlinear systems with a block-triangular-like structure. Finally, we will give three examples to show the applications of our results.     

用水萃取法提取仙人果中的玫瑰红色素

以水为萃取剂,加入L-抗坏血酸作抗氧化剂、果胶酶降解果胶、改性甲壳胺吸附蛋白质.提取仙人果中的玫瑰红色素,此法萃取率高、工艺简单、无污染.     

平面反射对称操作对平均场Hamiltonian的约化

研究了原子核平均场中本征能量的求解．当不存在任何几何对称性时，能量矩阵由２ Ｎ×２ Ｎ个复数矩阵元组成（ Ｎ 为基矢的大小）；如果空间存在１ 个反射对称平面，该２ Ｎ×２ Ｎ复矩阵可约化为１ 对互为共轭Ｎ×Ｎ复矩阵或１ 个２Ｎ×２Ｎ实矩阵；如果存在２ 个互相正交对称平面，则可约化为２ 个Ｎ×Ｎ实矩阵．     

On functional decomposition of multivariate polynomials with differentiation and homogenization

This paper gives a theoretical analysis for the algorithms to compute functional decomposition for multivariate polynomials based on differentiation and homogenization which were proposed by Ye,Dai,and Lam(1999) and were developed by Faugere,Perret(2006,2008,2009).The authors show that a degree proper functional decomposition for a set of randomly decomposable quartic homogenous polynomials can be computed using the algorithm with high probability.This solves a conjecture proposed by Ye,Dai,and Lam(1999).The authors also propose a conjecture which asserts that the decomposition for a set of polynomials can be computed from that of its homogenization and show that the conjecture is valid with high probability for quartic polynomials.Finally,the authors prove that the right decomposition factors for a set of polynomials can be computed from its right decomposition factor space.     

有关改变教学方式的苦干问题析论

对从根本上改变现有的教学方式的必要性做了简要的说明；对长期以来导致教学方式几乎没有根本的改变的原因进行了分析论述；提出了新的教学方式构想以及为实现这一构想所应做的事情。     

MULTIPLE CRITERIA DECISION MAKING： DISCORDANT PREFERENCES AND PROBLEM DESCRIPTION

There are many practical decision problems where decision makers＇ preferences may be inconsistent and contradictory. In this paper, new methods for ordering and classifying multi-attribute objects by discordant collective preferences are suggested. These methods are based on the theory of multiset metric spaces. The proposed techniques are applied to ranking companies and a competitive selection of projects, which are estimated by several experts upon multiple qualitative criteria.     

进口有旋及畸变条件下轴流式扩压器的数值分析

本文应用改进的二维椭圆型通用程序对锥形扩压器流场作了计算。计算扩张角2(?)的范围为8°,12°,15.8°和16°,面积比AR 为1.5～9.0左右。计算中应用湍流的有效粘性模型和二方程k—ε模型。扩压器进口气流条件为无旋的,有旋的和轴向畸变的三种。计算结果与试验性能数据的比较是令人满意的。文中还对JT3D涡扇发动机的环形扩压器进行全流场的计算。本方法可提供设计复杂形状扩压器或其他流域的流场分析,性能预报和试验方案。     

An approximate analytical solution to the ultrafiltration profile in a hemodialysis process between parallel porous plates

In a hemodialysis process, the blood that runs through straight channels exchanges substances with the dialysate through a semi-permeable membrane. The waste products, such as urea and creatinine, are therefore removed from the plasma by the membrane. In the analysis of this process, determination of the ultra-filtration profile along the porous membrane surface remains a difficult problem. In this work, an analytical solution to the derivation of such a profile was detailed, and the feasibility of this solution was discussed. The ultra-filtration profile was found to be in a cosine shape.