关系亲密程度的LTE异构网络切换算法

处于宏蜂窝和毫微微蜂窝覆盖范围内的用户设备为满足用户体验质量,需进行大量的切换操作,随着总切换次数的增加,用户设备将持续占用部分物理资源,导致系统吞吐量降低.提出一种关系亲密程度的长期演进(LTE)异构网络切换算法,通过统计用户设备接入毫微微蜂窝的历史信息来估计用户设备与毫微微蜂窝的关系亲密程度,利用该属性对等待切换的用户设备进行优先级排序,结合用户设备的接收信号强度、移动速度、毫微微蜂窝可用带宽进行综合切换判决.数值结果表明提出的切换算法大幅降低总切换次数,显著减少不必要切换次数,有效提高系统吞吐量.     

DYNAMICAL EVOLUTION OF URANIAN ε RING WITH MAPPING APPROACH

ＤＹＮＡＭＩＣＡＬＥＶＯＬＵＴＩＯＮＯＦＵＲＡＮＩＡＮεＲＩＮＧＷＩＴＨＭＡＰＰＩＮＧＡＰＰＲＯＡＣＨＺｈｏｕＪｉｌｉｎＳｕｎＹｉｓｕｉ（ＤｅｐａｒｔｍｅｎｔｏｆＡｓｔｒｏｎｏｍｙ，ＮａｎｊｉｎｇＵｎｉｖｅｒｓｉｔｙ，２１００９３，Ｎａｎｊｉｎｇ，...     

川西南山地轮歇地、撩荒地与荒芜人工草地的群落结构研究

本文论述了川西南山地不同演替阶段,不同人为影响下的轮歇地、撩荒地及荒芜人工草地的环境生态,植物种类组成,群落数量特征,优势度与生产能力,特别比较了不同演替年限的植被经济类群比例。着眼于合理利用,提出通过人工生态因素的渗透促进植被的进展演替和重建优化的次生群落。     

新加坡南洋理工大学德育创新教育评介

新加坡南洋理工大学是一所十分注重创新教育的大学。它不仅开设了形式多样的德育创新教育课程,而且在校园文化中也很好地做到了对学生创新精神的培养。它的德育创新教育课程分为两类,一类是寓于通识教育课程中的创新教育课程,另一类是寓于专业课程中的创新教育课程。在校园文化中创新教育主要体现为旗帜鲜明的＂创业型大学＂办学理念和开展丰富多彩的创新竞赛活动。     

论复杂系统演化理论的变革及其复杂性规律问题的探讨

复杂性是复杂系统的本质特征,非线性复杂性对线性简单性的变革是本质属性的根本性变革。这种变革理论涉及方方面面;变革引发的复杂系统演化规律问题,值得探讨。     

Caecilian viviparity and amniote origins

A recent evaluation of alternative hypotheses for the origin of the amniotic egg, by mapping a single reproductive-mode character onto a phylogeny of tetrapods, concluded that the alternative hypotheses were equally parsimonious. However, this interpretation is dependent upon a mistaken coding of the caecilian amphibians as showing extended embryo retention. Although some caecilians are viviparous, phylogenetic analyses indicate that oviparity is ancestral for the group. With the coding of caecilians corrected, the most parsimonious inference is that the ancestral amniotes did not practice extended embryo retention. A review of the available data indicates that the widespread view that a majority of caecilians are viviparous is mistaken. Oviparity is the dominant reproductive mode in caecilians as it is in other living amphibians.     

科技进步预警模型构建及应用研究

科技进步预警有助于深入认识科技发展的优势与不足,有效防范和控制科技进步发生警情.在科技进步综合评价基础上,构建了科技进步预警模型,并应用该模型对温州市2003 - 2009年科技进步状况进行了实证研究.     

New species of Australian cockroaches in the genus Paratemnopteryx Saussure (Blattaria,Blattellidae, Blattellinae), and a discussion of some behavioural observations with respect to the evolution and ecology of cave life

Three new species of Paratemnopteryx Saussure (Blattellidae) cockroaches from Australia are described. One surface dwelling species, P. rosensis, was collected from south-east Queensland, and two cavernicolous species, P. kookabinnensis and P. weinsteini, were collected from central Western Australia and north-east Queensland respectively. All three species demonstrate eye and wing reduction, consistent with adaptation to a homogeneous environment. P. weinsteini and P. rosensis species demonstrate sexual wing dimorphism, which is most clear in the former. P. weinsteini is very similar to P. rosensis, and they are probably sister species. I suggest that some surface dwelling species may have given rise to cavernicolous species as a result of isolation in moist refugia during periods of increasing aridity in Australia in the late Cenozoic.     

Larval feeding habits of the Hepialidae (Lepidoptera)

The host-plant relationships of the Hepialidae are discussed in relation to host range and larval tunnelling behaviour. Larvae are mostly phytophagous on live angiosperms, gymnosperms, pteridophytes and mosses. Generally they specialize as feeders of leaf, stem/branch or root tissue, but dietary transitions from leaf to stem and root to stem occur in some species. An early period of mycophagy where larvae feed on fungi or dead decaying plant tissue is recorded in a wide range of species that feed on live embryophytes in later instars. Feeding patterns of the Hepialidae are compared with those of other major lepidopteran taxa and the evolutionary implications of hepialid feeding habits for the origin and derivation of larval host-plant relationships in Lepidoptera are discussed. It is suggested that the developmental transition from mycophagy to phytophagy in the Hepialidae is the result of partial ‘suppression’ of mycophagy in the generalist feeding ancestor of Lepidoptera.     

Two new Falcaustra Lane, 1915 species (Nematoda: Kathlaniidae) from African pipids (Anura)

Two new species of Falcaustra Lane, 1915 are the first to be reported in amphibians from mainland sub-Saharan Africa. Falcaustra puylaerti n. sp. occurs in hosts of the Xenopus (Silurana) tropicalis group in Sierra Leone, Togo and Nigeria. Falcaustra hinkeli n. sp. infects Xenopus (Xenopus) fraseri group hosts at localities in the Cameroon and the Democratic Republic of the Congo. Falcaustra hinkeli and F. puylaerti are probably sister species with respect to described congeners and can be differentiated from each other by the form of the cheilostomal structures, the morphometrics of the anterior body, and by a large difference in male spicule length. Both lack a precloacal pseudosucker and are separated from other Falcaustra spp. which share this characteristic by the pattern of male caudal papillae and by a cheilostomal ring with associated sclerotized elements and posteriorly directed projections. Evolutionary aspects of the host-parasite relationship are discussed. Although alternative hypotheses are possible, the distinctive cheilostomal morphology, the sister species relationship and the host specificity pattern of F. hinkeli and F. puylaerti are consistent with their having undergone an extended evolutionary association with the host genus.