Mammals in a fragmented savannah landscape in south-western Brazil

Mammal abundance, richness, and community structure were examined in fragments of savannah and in gallery forests of south-western Brazil in order to assess the influence of fragment size and habitat on the communities. Five savannah fragments and two gallery forests were sampled. Within the savannah fragments, environmental parameters such as tree and shrub densities were measured. Live-traps and pitfalls were used for trapping small mammals; larger mammals were recorded from footprints and sightings. Seventeen species of small mammal and 15 species of large mammal were recorded. Small mammals were affected by fragment size and isolation, whereas larger mammals were not. Communities of small mammals were better structured in the largest fragments, and those in smaller fragments were subsets of the communities in larger fragments. Gallery forests revealed a rather different assemblage of mammals, but also contained species common to both gallery and large savannah remnants. Data are discussed relating mammal community structure to area size and vegetation structure, in an attempt to understand the present conservation status of this fragmented landscape.     

滴定分析中固、液体鉻黑T指示剂应用比较

分别采用初配和配制7天后的固、液体铬黑T指示剂标定EDTA溶液及测定水的总硬度,根据实验结果分析两种形态指示剂的使用效果,结果表明,新配制的EBT固、液指示剂,标定EDTA时有显著性差异,测定水的总硬度时,两种指示剂无显著性差异;配制7天后的EBT固、液指示剂,标定EDTA及测定水的总硬度时,使用两种指示剂均存在显著性差异.经F检验,液体铬黑T指示剂放置7天后测定精密度低于新配制指示剂,固体鉻黑T指示剂放置前后测定精密度无显著变化.因此得出结论,若实验时新配制指示剂,选用液态为佳,否则,要使用固体鉻黑T指示剂.     

New amphipods of hydrothermal vent environments on the Mid‐Atlantic Ridge,Azores Triple junction zone

This work is the third publication on the new amphipod species collected from the Azores Triple junction zone by the cruises ATOS, DIVA 2, MARVEL, PICO and SEAHMA 1. Seven new species and a new genus are described belonging to six families, Eusiridae, Leucothoidae, Oedicerotidae, Phoxocephalidae, Pleustidae, and Podoceridae. They were sampled in four sites, Menez Gwen, Lucky Strike, Saldanha and Rainbow.     

The African species of Zaglyptogastra (Hymenoptera) with a checklist of world species

An illustrated key is provided to the African species of the braconine wasp genus (Zaglyptogastra Ashmead. Four new species are described: Z. afenestrata sp. nov. from Ruanda, Z. levisulcata sp. nov. from Uganda, Z. tenuicauda sp. nov. from Angola, Congo and Zaire, and Z. virgulivena sp. nov. from Zaire. A replacement name, Z. caudatula nom. nov. is proposed for Calliidia caudata Szépligeti, 1914b. Six new synonymies are proposed: Zaglyptogastra basalis (Szépligeti; 1914) (= Z. equitator (Wiedemann, 1824)); Z. leucogaster (Cameron, 1909a) (= Z. nigripennis (Szépligeti, 1908)); Z. stanleyi (Cameron, 1912), Z. maxima (Szépligeti, 1914b), Z. eleganta (Shenefelt, 1978) and Z. tomentosa (Fahringer, 1931) (= Z. tincticanaliculata (Cameron, 1912)). Notes are provided on the African species and species groups. A checklist of world species is given.     

测量学教学中竖盘指标差计算的问题处理及应用

竖盘指标差是测量学教学中竖直角观测的一项重要误差,但在国内不同测量学教材中对于竖盘指标差的计算却存在着多种公式不统一的问题。为提高教学效果并使计算统一,从竖盘指标差在实际测量工作中的作用和意义上,提出了竖盘指标差计算的新观点。该处理方法在教学及工程实践中合理、可行。     

Predicting Recessions with Factor Linear Dynamic Harmonic Regressions

We propose a new framework for building composite leading indicators for the Spanish economy using monthly targeted predictors and small‐scale dynamic factor models. Our leading indicator index, based on the low‐frequency components of four monthly economic variables, is able to predict the onset of the Spanish recessions as well as the gross domestic product (GDP) growth cycles and classical industrial production cycles, both historically and in real time. Also, our leading indicator provides substantial aid in forecasting annual and quarterly GDP growth rates. Using only real data available at the beginning of each forecast period, our indicator one‐step‐ahead forecasts shows substantial improvements over other alternatives. Copyright © 2013 John Wiley & Sons, Ltd.     

国有企业绩效管理体系探析

随着我国加入WTO，国有企业面临的竞争对手越来越多，竞争压力越来越大。在国有企业现行绩效管理体系中存在着认识不足、沟通不畅、管理定位不准确和绩效指标体系设置不科学等问题。应该通过提高绩效管理认识、营造良好的沟通氛围、健全绩效反馈机制、创新绩效激励体系以及建立合理的指标考核体系来改进。     

文山州甘蔗品种比较试验

试验从生长情况、产量、含糖量等主要指标对文山州普遍栽培的7个甘蔗品种进行比较。结果表明：园林1号生长旺盛、产量高、含糖量高，为优良甘蔗品种，宜在文山州大面积推广栽培。     

网络环境下的信息检索系统评价

在介绍信息检索系统评价基本理论的基础上,对网络环境下信息检索系统评价指标的特征进行了总结,提出了一套适用于网络信息检索系统评价的指标体系。     

科技指标体系完备性与可行性的对策研究

通过对科技指标体系设计方法的研究,对科技指标体系理论与现实(完备性与可行性)的关系进行了论述,指出在科技指标体系构建过程中各阶段应注意的问题,同时以科技人力资源指标体系为例,着重介绍了从理论指标体系向现实指标体系的转化方法,并分别给出科技人力资源的理论与现实指标体系。指出体系的构建应从政府关注角度出发,力求在完备性与可行性之间达到平衡,以全面推进决策的科学化。