运用同伦连续法求解二阶时标边值问题

用同伦连续法证明了时标动力学边值问题的连续性定理,并给出了寻找解的全局收敛方法.     

假发纤维拉伸力学性能探讨

以目前市售的几种假发原料为测试样品,探讨了各自在干、湿状态下纤维的拉伸性能;分析了真人发的强伸性能及其影响因素,包括不同轴向部位、不同拉伸速度、不同夹持长度以及不同处理方式的影响.实验结果表明,胶原蛋白/PAN共混纤维假发与真人发在干态条件下的拉伸性能较为接近;在湿态下,真人发具有比其他假发纤维大的伸长率,保形性较好;速度与夹持长度对人发纤维的强伸性能有明显的影响;人发经强化梳理后,断裂强度与伸长略有下降,而皮质部分受损的人发纤维,强伸性能显著下降.     

基于数值模拟的语言计算方法

为了描述模糊信息并建立模糊逻辑,研究了基于扩展原理和符号化模型的语言计算方法,提出基于数值模拟的对称分布语言变量表示及计算模型.该模型用特征值和标准方差二维数值反映语言的共性和特性.为了扩大运用范围,针对用任意三角模糊数表示的语言变量,提出基础语言集的寻找方法,以实现语言变量统一,完成模糊语言之间的逻辑运算.在此基础上...     

Microstructures and nanostructures of high Andean Penaincisalia lycaenid butterfly scales (Lepidoptera: Lycaenidae): descriptions and interpretations

The scales of one high Andean eumaeine lycaenid butterfly species with pale dorsal coloration and four species with vivid dorsal colour were investigated using field emission scanning electron microscopy. The micro‐ and nanostructures are illustrated, described, measured, and interpreted. The vivid colours in the species are caused by a pepper‐pot nanostructure of Urania‐type scales. This nanostructure is a three‐dimensional lattice within the body of the individual scale. The scales of the non‐vivid orange species are lacking this nanostructure and the surfaces of their scales show high microstructure irregularities. This absence of vivid colour may be correlated with thermal regulation. The irregularity of the scale microstructures suggests a heavy environmental pressure on the populations sampled. Previously unknown structural variations of Urania‐type scales are also described. The existence of closed scale microcell structures, explained as an apomorphic character in the tribe Eumaeini, most probably evolved independently several times. It is hypothesized that scale micro‐ and nanostructure modifications develop syntopically within a population, which in turn can lead to rapid diversification.     

Dempster-Shafer （D-S） algorithm with credit scale in spectrum sensing

In cognitive radio, the detection probability of primary user affects the signal receiving performance for both primary and secondary users significantly. In this paper, a new Dempster-Shafer (D-S) algorithm with credit scale for decision fusion in spectrum sensing is proposed for the purpose to improve the performance of detection in cognitive radio. The validity of this method is established by simulation in the environment of multiple cognitive users who know their signal to noise ratios (SNR) and a central node. The channels between the cognitive users and the central node are considered to be additive white Gaussian noise (AWGN). Compared with traditional data fusion rules, the proposed D-S algorithm with credit scale provides a better detection performance.     

A Test of the Reliability and Validity of ICCS

This study is designed to test the reliability and validity of intercultural communication competence scale (ICCS). A survey was designed to explore this question. Eighty-five students participated in this study. The ICCS was found to have low reliability and no significant relationship was found between students’intercultural communication competence and their satisfaction with school.     

工科大学生的图书馆焦虑现象研究

采用心理测量学和统计学原理及方法研究了工科大学生的图书馆焦虑现象。结果表明,工科大学生总体上存在低度图书馆焦虑现象,其中有20.93%的学生无图书馆焦虑现象,37.56%的学生有低度图书馆焦虑现象,41.51%的学生有轻度图书馆焦虑现象;工科大学生在5个维度上均有不同程度的图书馆焦虑现象,其中在检索维度上焦虑程度最高,在舒适性维度上焦虑程度最低;工科大学生的焦虑程度与性别无关,知识维度和检索维度的焦虑程度分别与年级和外语语种差异显著,低年级学生和小语种学生的焦虑程度相对较高。     

Observations on the spectral reflectances of certain high Andean Penaincisalia and Thecloxurina,with the description of a new species (Lepidoptera: Lycaenidae: Eumaeini)

The eumaeine hairstreak species Thecloxurina tegulina Bálint and Boyer, sp. n. from SW Peru, department Apurímac (type locality: Karkatera, NW of Ampay, 3,200 m, 13°34′286″S; 72°58′501″W) is described on the basis of qualitative and quantitative wing pattern, male genital and spectral characters. The spectral reflectance of the closely related genera Penaincisalia and Thecloxurina are investigated and compared. It is demonstrated that the spectral characteristics of the two genera are qualitatively differing, and the taxa investigated representing the two genera (Penaincisalia:Thecloxurina = 3:5) also have characteristic species dependent reflectance peaks measured at normal incidence.     

陶瓷强度的统计方法

陶瓷作为结构材料，强度离散及尺寸效应是所面临的主要问题之一。围绕这一问题，归纳和分析了当前应用统计学进行处理的主要理论和方法．对统计模型的建立、分布函数的参数估计、强度的尺寸效应，以及由材料试验获取强度分布函数的参数所存在的问题等，作了比较细致的讨论，提出了几个新的看法。     

水电站尾水河道定床变态模型相似律

水电站尾水河道的水流几何形态变化得足够强烈或频繁时，尾水河道中水流单位 长度上的能量损失．主要是局部阻力损失．考虑水流局部能量损失，得到模型相似参 数。采用不同的方法证明了水力摸型试验成果的缩尺影响很小．水力模型试验成果与 原型观测资料比较，两者符合较好。