Absorption events associated with solar flares

During the upward period of solar cycle 23, the Imaging Riometer at Zhongshan, Antarctica (geomag. lat. 74.5 S) was used to study the solar proton events and the Xray solar flares which are associated with the absorption events. In our study, the relationship between the absorption intensity and X-ray flux is found in a power form which is consistent with the theoretical result. The imaging riometer absorption data at Ny-Ålesund, Svalbard reconfirm the above relationship. We also argue that only M-class flares can generate a significant daytime absorption.     

韧性剪切带中金成矿地质构造解析方法及找矿预测——以卡拉麦里大断裂带金矿为例

韧性剪切带是地壳中深层次呈带状展布的高应变的韧性断层.韧性剪切带型金矿是一种非常重要的金矿床类型.以卡拉麦里断裂带附近发现的与韧性剪切带型相关的金矿床(金矿点)为研究对象,解剖了韧性剪切带的成矿特征研究,主要从剪切带的构造成因机制、组构特征、剪切带的变形与成矿的关系、金矿与剪切带的关系、成矿模式与成矿预测做了一个深入的分析.大型深剪切断裂应变特征和构造演化控制着金的成矿作用,成矿流体具有多源性,构造叠加和区域构造转换在剪切带长期演化过程中,使得成矿作用具有多期性和复杂性,多种有利累加效应使得成矿作用规模不断提高,从而形成大型剪切金矿带或金矿集中区.     

关于2—连通图的最长圈

若G是2-连通图,如对G中任何两个距离为2的点υ,ν都有d(υ)+d(ν)≥λ-1(5≤λ≤|V(G)|),则除了两类图外,G的最长圈的长至少为λ。     

竞赛图中王的两个充分条件

本文证明了竞赛图中王的两个充分条件,Landua关于竞赛图中王的充分条件是本文定理1的推论.     

聚丙烯拉伸性能测试及再屈服行为

为明确热塑性塑料塑性变形阶段加载-卸载-再加载的力学行为,采用注塑成型方法制备了哑铃型聚丙烯试样,进行了单轴拉伸实验。实验结果表明：所制备的试样具有良好的性能稳定性,试验结果重现性好,应力-应变曲线符合部分结晶热塑性塑料的一般行为。通过不同应变速率测试结合断口形貌扫描电子显微镜(scanning electron microscope, SEM)观察,表明应变速率超过50 mm/min时,试样由韧性断裂转变为脆性断裂,断口形貌由穿晶断裂形貌转变为河流花样形貌。聚丙烯的加载-卸载-再加载测试表明,在低应变速率情况下,塑料在再加载之后的应力-应变曲线存在明显的再屈服行为,与金属的包辛格效应存在明显不同。加载-卸载-再加载的应力-应变曲线会出现第二个屈服点,其屈服应力低于第一屈服应力,并且其数值与卸载点应变无关。研究结果为热塑性塑料塑性阶段的加工和使用提供理论支持。     

2－连通图的最长路

设Ｇ是２－连通图，对Ｇ中任一对不相邻的顶点ｕ，ｖ，｜Ｎ（ｕ）∪Ｎ（ｖ）｜≥ｓ．Ｆａｕｄｒｅｅ猜测，当Ｇ的顶点数　ｓ为奇数时，Ｇ的最长路的顶点数　本文证明猜测当ｓ＞３时是真的．进而证明了除一类图外Ｐ（Ｇ）≥ｍｉｎ｛｜ｖ（Ｇ）｜，２ｓ＋ｌ｝．     

用T^＊＊分数计算高考考生成绩

本文提出了把高考考生各科的原始分数转化为T~(**)分数,进而用T~(**)分数计算考生总分,用以衡量考生的成绩,以分优劣。     

Design and implementation of hardware architecture in ionospheric oblique backscattering sounding system

The ionospheric oblique backscattering sounding system can not only be used to detect the state of ionosphere and the condition of high frequency channel in real time, but also be used for over-the-horizon sounding. So, it has a very high military and civil value. For the characteristics of ionospheric oblique backscattering sounding, such as long sounding distance, wake echo, strong background noise, slow moving target, etc., a hardware platform of ionospheric oblique backscattering sounding system is designed. This platform adopts the technology of software radio and is designed as a new kind of general-purpose, modularized, software-based ionosonde that is based on VXI (Versa module eurocard eXtensions for Instrumentation) bus. At present, this hardware platform has been successfully used in actual ionospheric oblique backscattering sounding, and the experimental results demonstrate that this system can satisfy the demands of ionospheric oblique backscattering sounding preferably. Foundation item: Supported by the National Natural Science Foundation of China (40474066)     

一种刀片加密服务器加密卡的设计与实现

刀片加密服务器在更好的保证网络的安全性的同时,能够使以往的网络系统更加安全和经济.刀片加密服务器与普通的服务器有着很大的区别.其中加密卡在刀片加密服务器中的占有重要的地位.介绍了加密卡的组成部分与设计原则.     

Rank-Based Test for Partial Functional Linear Regression Models

This paper investigates the hypothesis test of the parametric component in partial functional linear regression models. Based on a rank score function, the authors develop a rank test using functional principal component analysis, and establish the asymptotic properties of the resulting test under null and local alternative hypotheses. A simulation study shows that the proposed test procedure has good size and power with finite sample sizes. The authors also present an illustration through fitting the Berkeley Growth Data and testing the effect of gender on the height of kids.