激光对负离子光剥离截面影响的研究

利用半经典理论,计算了激光极化方向对氢负离子在金属面附近光剥离截面的影响.结果表明,在临界能量范围内氢负离子的光剥离截面发生了较大的变化.与激光极化方向沿z轴时的光剥离截面相比,截面的振荡幅度随激光极化方向与z轴夹角的增大而减小,振荡频率没有发生变化.结果对于研究负离子体系在界面附近的光剥离问题具有一定的参考价值.     

A novel Chinese polar knowledge repository based on polar data-sharing ontology

In order to archive and utilize the information from Chinese polar expeditions to the greatest extent, we design a novel knowledge repository, in which an automatic query model based on neural networks is proposed and a data call trigger is established to keep data consistent between polar data-sharing platforms. And in this repository, anybody can make contributions to the repository by creating or updating entries with version control and an authority control mechanism. In this paper, the data sources, data processes and network structure of this repository are described, and the keywords extraction and decision support operation are detailed. The analysis of this design’s feasibility and applicability indicates that this knowledge repository is open, sole and authoritative for Chinese polar expeditions.     

Angular-based spatially resolved laser-induced breakdown spectroscopy: a new technique for the effective enhancement of signals without an external time delay system

In this study, we developed a novel angularbased spatially resolved laser-induced breakdown spectroscopy(ABSR-LIBS) technique. This new method allows the spatially resolved spectroscopic properties of laserinduced plasma to be investigated using different angles and polar distances with a spatially adjustable fiber optics probe. The experimental evaluations suggested that the intensity of the Al signal distributions in the ‘‘side-view'depended greatly on the angle of the collection probe. The location of a collection probe at 50° would facilitate efficient spectral collection and minimize the disturbance of the plasma plume. The spectral signals in the plasma emissions had different distribution at various polar distances using the same collection angle, and the highest signal intensity was observed between 15 and 35 mm polar distances. This ABSR-LIBS technique improved both the LIBS signal and the maximum emission intensity of Al atoms by several times at the best spatial position in our experimental conditions. Furthermore, we successfully obtained well-resolved line emission spectroscopy signals without any external time delay using a nongated spectrometer based on the ABSR-LIBS system. We consider that the ABSR-LIBS technique has great potential for obtaining new insights with laser-induced plasma instruments and it could facilitate the development of a low-cost instrument.     

一种基于RTK的田赛距离测量方法

在分析RTK应用于田赛距离测量的可行性的基础上,提出了一种基于RTK的田赛距离测量方法.通过对跳远项目的测量实验,并将其数据与传统测量方法获得的数据进行对比分析,验证了该方法的科学性和合理性.结果表明,利用RTK技术可以为田赛距离测量提供一个快速、实时且精度较高的方法.     

抗战时期华北根据地的法制建设述论

抗日战争时期,根据《抗日救国十大纲领》,华北各根据地政府相继颁布一系列法规,使根据地各项工作有法可依,同时建立司法制度,推进公平审判工作,促进了根据地法制建设,产生了积极影响。     

Global Chaos Synchronization of Three Coupled R?ssler Systems and Its Novel Method of Chaos Encryption

以Lyapunov稳定性理论为基础,针对非扩散R?ssler系统研究了3个耦合的恒等系统的全局同步问题.通过选取适当的耦合参数,使得3个系统的耦合参数达到同步.基于混沌遮掩的方法,利用3个耦合的恒等系统,提出了1种二次加密方法,在前2个耦合系统中加密后,利用后2个耦合系统再一次加密.仿真结果表明,3个耦合的恒等系统很快同步,应用于保密通信中达到了掩盖有用信号的目的,并且无失真地恢复出了有用信号.     

Monitor the Entire Risk Management System of the Custody Business of Commercial Banks

随着经济全球化趋势的进一步加强,我国商业银行的发展也正在与世界接轨,其中托管业务的开展就是与国际接轨的一个直接证明.同时,由于国际竞争的越发激烈,境外机构纷纷把中国作为将来的主要市场,这对我国的商业银行是一个巨大的挑战.所以我国的商业银行要理顺发展思路,重新构建托管业务监控体系,来应对即将到来的竞争.     

Discovery of Late Carboniferous strata and their tectonic significance in the southern margin of the North China Block （Huoqiu and Gushi areas）

Late Carboniferous fossils （such as Boultonia？ sp., Tabulata, and spiriferoid specimens with smooth she/Is）, bioclastic material （such as crinoid stems and sponge fragments）, and Late Ordovician microfossils of the conodont Belodina have been discovered in the lower part of the strata typically referred to as the Neoproterozoic on the boundary of the provinces of Anhui and Henan in the southern margin of the North China Block. These findings prove that the strata contain macrofossils belonging to the Late Carboniferous, which belonged to a carbonate debris flow deposit that was formed under a carbonate slope environment. The conodont fossils might belong to a detrital deposit. Thus, it is possible to reset the stratigraphic sequences and tectonic attributes belonging to the North Huaiyang tectonic belt and limit the Shouxian fault to the boundary between the Dabie Orogen and North China Block.     

深圳红树林自然保护区海水重金属质量评价

为保护红树林海域环境，改善海水质量，对深圳红树林自然保护区16个样点进行海水采集，样品通过ME ICP41W测定Hg、Cd、As、Pb、Cu、Cr含量，并基于Hakanson指数法和倍斜率隶属函数聚类法评价海水质量.评价结果显示:深圳红树林自然保护区海水中Hg属于“极强生态危害元素”，As属于“强生态危害元素”，Cd属于“中等生态危害元素”，Pb、Cu、Cr属于“轻微生态危害元素”；海水整体上属于“很强生态危害”范畴，但以一类海水为主，部分靠近河涌排污口的样点为二类和四类海水；重金属主要来源于生活和工业废水，Pb、Cu、Cr、Cd共同的污染源来自调查区周边的合金制造厂和印刷厂；Hakanson指数法和倍斜率隶属函数聚类法对海水质量的评价结果相关性高，表明所采用的评价方法可行.该研究对深圳红树林自然保护区海域保护和海水重金属评价方法具有参考价值.