河北省地衣2新记录属

首次报道了河北省产2个地衣新记录属,即泡鳞衣属(Toninia A.Massal.)和文字衣属(Graphis Adans.),并对2属地衣的形态结构特征、生境、化学成分及分布地区进行了简要概述.     

两个河北植物分布新记录属

经野外调查和标本采集与鉴定,小果亚麻荠(Camelina microarpa Andrz.)和蒺藜草(Cenchrus calyculatus Cavan.Icon.)在河北省昌黎县有天然分布,亚麻荠属(Camelina Crantz)和蒺藜草属(Cenchrus L.)为2个河北植物分布新记录属。     

一种对WLAN的IEEE 802.1x认证实施中间人攻击的改进方案

为了避免WLAN在进行IEEE802．1x认证的过程中遭受中间人攻击,对IEEE802．1x标准的运行机制进行分析．证实了对WLAN在进行IEEE802．1x认证时确实存在被中间人攻击的危险。通过给硬件固化唯一不可更改的标识,在Supplicant端建立AP信息记录表等,中间人攻击可以有效地被避免。     

硬盘主引导记录的数据重建

从硬盘主引导记录和分区表的结构着手,介绍了硬盘主引导记录的查看及修改方法着重论述了如何在不破坏硬盘原有数据的情况下,重建主引导记录的原理和方法     

Rapid oscillations of Chinese monsoon climate since the last deglaciation and its comparison with GISP2 record

The geographic extent of the climate oscillations during the last deglaciation is an open question in the world. Here a high resolution climate record from a 16 000 C-14 a loess sequence in the northwestern margin of the Chinese Loess Plateau is reported. Comparison with GISP2 record shows that all major climate oscillation (e. g. Oldest Dryas/ Boiling/ Older Dryas/ Allerod/ Younger Dryas) in the North Atlantic region also registered in the record. In addition, the sequence also contains some other distinctive strengthened winter monsoon periods. It is suggested that a coupling mechanism operate between the two areas, and climate oscillations in the North Atlantic region may not be a local phenomenon.     

不规则期刊的记到方法

阐述了不规则的几种期刊记到方法,并说明了记到与现刊的上架和查询、订购的催询、过刊的装订等各个环节工作中的关系。     

High-resolution sedimentary records of heavy metals in Guangzhou section of the Pearl River, South China

The sedimentary feature and variation of heavy metals in ca. 100 years, especially in the last three decades, in the riverbed of Guangzhou section of the Pearl River were revealed by the sedimentary heavy metal fluxes and total organic carbon (TOC) in a 210Pb-dated sedimentary core. It is suggested that the historical changes of heavy metal contamination can be recorded by pollutant sedimentary fluxes rather than by their concentrations. The heavy metal contamination in the river section was divided into 6 sedimentary historical stages of 3 groups, which correspond to the economic development and regional urbanization process.     

河北省苔藓植物区系新资料

报道了河北省藓类植物新记录８种：剑叶大帽藓,纯叶小石藓,折叶纽藓,齿边小壶藓,白龄藓,曲肋柳叶藓,异叶藓,并对它们的识别特主地理分布做了简要讨论。     

《河南植物志》紫草科增补与订正

增补报道了《河南植物志》中未记录的河南产紫草科植物6种,其中湖北附地菜(TrigonotismollisHem sl.)为河南分布新记录;订正了一个分类群的学名.     

试论方志记载的彗星的声

把极光的成因和发声机制与彗尾的成因和发声机制作类比,认为当I型彗尾与地球接触时,可以因彗尾的带电微粒与地球高层大气的等离子粒子互相撞击、扰动等,加上某些未知的原因而发出低频声。在这种物理机制的条件下,对中国14个地方志记载的9颗有声的彗星进行星历表计算,选择出1861Ⅱ和1910Ⅱ（即哈雷彗星）二颗彗尾扫过地球,和1744年另一颗彗尾朝向地球的慧星（即De Cheseaux彗星）进行分析,认为前二颗彗星完全有可能发声,并为地面所接收。地方志记载是事实,后一颗还有待于进一步证实。