中讯邮电咨询设计院

韩志刚大师事迹 `韩志刚同志从事通信工程设计和科研工作二十多年,专业基础理论扎实,工作经验丰富.有强烈的事业心和敬业精神,积极开拓,勇于进取.上世纪90年代承担和主持了信令网、智能网和汇接网等多项国家高新技术工程设计和重大专业科研课题,以知识、诚信、能力、奉献和公正圆满地完成了各项任务,得到了业界的认可和称赞,为我国通信网从小规模、低水平、低层次发展至今具有世界领先的网路规模和技术水平,做出了积极的贡献,产生了良好的社会和经济效益.参加信息产业部组织的电话网等课题的研究和通信系统的规划、规范、标准研讨等,撰写多篇专业科研著作或论文,完成的技术设计项目多次获部级以上奖励.     

南海北部陆缘东部的地壳结构

本文利用中、美联合调查南海海洋地质项目所采集的双船地震扩展排列剖面资料,研究了南海北部陆缘的地壳结构．其特征为：从陆架到深海平原,地壳呈阶梯状减薄,地壳厚度分别为２６—２８ｋｍ,２３—２４ｋｍ,１３—１５ｋｍ,以及南海洋盆中５—７ｋｍ厚的洋壳,反映了地壳在新生代早期是幕式拉张的．地壳底部存在高速地壳层,地震波速度为７．１—７．４ｋｍ／ｓ．它是在地壳被拉张后,上地幔熔融物质上涌到地壳底部冷却而形成的．     

湖南省不同区域及其林业用地的景观格局特征

在总结和参考前人区划成果的基础上,通过新老区划原则的严格界定,提出了新的湖南省林业区划方案.在该方案中,湖南省被划分为5个一级区和9个二级区.在此基础上,又利用全省2004年1:1万比例尺土地利用现状图件,分析了湖南省不同区域及其林业用地的景观格局特征.结果表明,洞庭湖区域、湘中区和湘南区的景观异质性较高,这几个区域对于全省的景观格局起控制作用.湘中区和长株潭地区的景观破碎化程度最高,湘南区最低,这与区内不同的人类活动强度完全成正比.在不同亚区中,洞庭湖丘陵亚区和武陵山亚区分别对洞庭湖区域和湘西区域的多样性指数变化起控制作用;而长株潭核心区亚区、湘西武陵山亚区和湘中涟邵盆地亚区的景观的破碎化程度严重,因此,这几个区域应当是是今后区域开发过程当中应当重点加以保护和生态修复的区域.而在林业用地当中,长株潭区域和湘中区域的景观破碎化程度最高,湘西和湘南区域的破碎化程度相对较低.今后应该继续加大对湘西和湘南地区的林业保护,同时加强长株潭、湘中和洞庭湖区域的林业建设.     

江油市规划应急水源地地下水水化学特征分析

通过在江油市规划应急水源地及其上、下游采集地下水水样进行化学分析,共采集15个样品。结合主离子浓度、Piper图及沿程变化对该水源地地下水的水化学特征及其上、下游地下水水化学变化规律进行分析,结果表明：研究区地下水呈弱碱性,属硬度水和极硬度水,TDS平均值为281.446 mg/L,其中阳离子以Ca2+、Mg2+为主,Na++K+次之;阴离子以HCO3-和SO42-为主,Cl-较少;地下水的化学类型为HCO3--Ca2+。在沿程变化上,自上游至下游,地下水TDS及主离子均有整体增加的现象。地下水化学类型由HCO3--Ca2+型变化为HCO3-·SO42--Ca2+·Mg2+型。     

Evaluating prey capture by larval mummichogs (Fundulus heteroclitus) as a potential biomarker for contaminants

We evaluated larval prey capture as a "behavioral biomarker" of contamination by examining feeding behavior of larval mummichogs (Fundulus heteroclitus) from many different sites, including a severely contaminated "Superfund" site, moderately contaminated sites, and reference areas. Prey capture ability was related to sediment contaminant levels. The levels of contaminants at a site were highly correlated with each other, so that the impact of individual contaminants was confounded. The number of captures of brine shrimp by mummichog larvae from all sites was highly variable, but significant negative correlations of prey capture were seen with mercury, lead, zinc, cadmium, and PCBs. As observed previously with adults, polyaromatic hydrocarbons (PAHs) did not appear to impair prey capture ability. The only site in which prey capture rates of 8-day old larvae were severely affected was the most highly contaminated Superfund site, Berry's Creek, NJ. This implies that larval prey capture is not as sensitive a behavioral biomarker for contamination as adult behavior studied previously.     

应用硫酸苯酚法建立一种甘露糖醛酸C-5差向异构酶活性检测方法的研究

建立了一种简便快捷的甘露糖醛酸C-5差向异构酶活性的测定方法。研究发现相同分子质量的聚甘露糖醛酸和聚古罗糖醛酸与苯酚硫酸试剂反应后显色程度不同,以此可以用来测定β-D-甘露糖醛酸/α-L-古罗糖醛酸(M/G)值的变化,从而计算甘露糖醛酸C-5差向异构酶的活性。利用本方法测定了已知结构的褐藻胶片断的M/G比,其结果与传统的1H-NMR测定值基本一致。     

斐济—汤加地幔过渡带的地震波各向异性

论述了一个不常见的、明显的过渡带(TZ)各向异性的实例,证据来自于许多比垂直偏振剪切波(SV)早到3s的水平偏振剪切波(SH)。各向异性区与远离活动俯冲带及已知的纵、横波速度横向非均匀体边界的深震相关。我们把这一各向异性区解释为与岩石层残骸中的巨大岩石异常体有关的强组构,这个巨大的岩石异常体悬浮并滞留于过渡带中。冷板块的快速俯冲非常适合于这种组构的形成,因此板块穿透到下地幔并不能普遍发生。     

Characterizing hydraulic conductivity with the direct-push permeameter

The direct-push permeameter (DPP) is a promising approach for obtaining high-resolution information about vertical variations in hydraulic conductivity (K) in shallow unconsolidated settings. This small-diameter tool, which consists of a short screened section with a pair of transducers inset in the tool near the screen, is pushed into the subsurface to a depth at which a K estimate is desired. A short hydraulic test is then performed by injecting water through the screen at a constant rate (less than 4 L/min) while pressure changes are monitored at the transducer locations. Hydraulic conductivity is calculated using the injection rate and the pressure changes in simple expressions based on Darcy's Law. In units of moderate or higher hydraulic conductivity (more than 1 m/d), testing at a single level can be completed within 10 to 15 min. Two major advantages of the method are its speed and the insensitivity of the K estimates to the zone of compaction created by tool advancement. The potential of the approach has been assessed at two extensively studied sites in the United States and Germany over a K range commonly faced in practical field investigations (0.02 to 500 m/d). The results of this assessment demonstrate that the DPP can provide high-resolution K estimates that are in good agreement with estimates obtained through other means.