Effect of E. coli coli on Anti-disease Activities of Scailops: Argopecten irradians

The effect of acute E. coli challenge on the anti-disease activity of scallops Argopecten irra-dians is examined. The treatments of scallop from which hemolymph samples were taken for study included (1) control scallops, (2) sham-injected scallops, (3) PSW-injected scallops and (4) E. coli-injected scallops. From the beginning, the anti-disease activities of scallops are deter -mined at 12 hr and 24 hr.The concentrations of circulating hemocytes, the total serum protein concentrations and the activities of alkaline phosphatase, acid phosphatase and superoxide dismutase in the scallops Argopecten irradians are determined.Injection with E. coli results in a significant elevation in the concentration of circulating hemocytes and in the alkaline phosphatase activity and a significant decline in the total serum protein concentration and in the superoxide dismutase activity at 24 hr postchallenge. It shows that metabolism of bay scallop is expedited to adopt the challenge.     

证券市场机构投资者的交易模式

对我国证券市场近年来市场成交量进行了统计分析，探讨了其中交易时间模式和运作模式的发展，提出了一种我国机构投资者新的交易模式，即网上交易模式．这对规范机构投资者的投资活动有着深远的意义．     

电子线路自动测试技术的研究

论述了电子线路自动测试技术在电子产品质量检测和故障定位应用中在线测试和功能测试两大测试方案,并对其中的一些关键测试技术进行了较详尽的理论论证和功能阐述;应用自动测试技术,有利于保证电子产品质量。     

一个直接计算结构动力方程的方法

以往计算结构动力方程的无条件稳定积分格式的证明,均假定阻尼为古典阻尼,即阻尼矩阵满足振型正交条件。本文给出的无条件稳定积分格式的证明,可不要求阻尼矩阵满足振型正交条件。同时本文方法具有较好的算法阻尼比和周期延长率,而且没有超越现象。     

接触燃烧传感器在钢瓶液化石油气残气检测中的应用

根据国家标准规定液化石油气钢瓶在进行气密性试验之前必须进行检验，瓶内残气体积分数不得高于０．４％，用接触燃烧传感器作为检测仪器的敏感元件时，由于输出的电压与可燃性气体体积分数之间几乎是线性关系，对不同气体成分，爆炸下限值几乎有相同的灵敏度，所以用异丁烷对仪器进行标定，并且以０．４％异丁烷体积分数作为报警点，保证了检测工作的安全     

紫外线诱发小鼠染色体C带的产生

本文报道了一种用紫外线处理小鼠骨髓细胞产生染色体C带的方法。初步分析了紫外线—C带的产生原因。本工作证明了Comings提出的C显带机理。     

Green chemistry: biodiesel made with sugar catalyst

The production of diesel from vegetable oil calls for an efficient solid catalyst to make the process fully ecologically friendly. Here we describe the preparation of such a catalyst from common, inexpensive sugars. This high-performance catalyst, which consists of stable sulphonated amorphous carbon, is recyclable and its activity markedly exceeds that of other solid acid catalysts tested for 'biodiesel' production.     

乱序四点法直线误差分离技术

提出了一种新的时域乱序四点法直线误差分离技术，它通过对4个特定布置传感器的输出数据进行冗余组合和乱序递推，能快速精确地分离出工件的直线形状误差和工作台的直行误差运动，该方法既避免了频域三点法中必须经过正反两次Fourier变换从而使计算时间相对较长的问题，又有利于在线检测与补偿加工；同时，既克服了时域逐次三点法传感器之间的间距必须等于采样间隔的限制，又可以获得更为密集的采集数据，达到更高的分离精度。     

Using Link Analysis Technique with a Modified Shortest-Path Algorithm to Fight Money Laundering

Effective link analysis techniques are needed to help law enforcement and intelligence agencies fight money laundering. This paper presents a link analysis technique that uses a modified shortest-path algorithms to identify the strongest association paths between entities in a money laundering network. Based on two-tree Dijkstra and Priority＇First-Search （PFS） algorithm, a modified algorithm is presented. To apply the algorithm, a network representation transformation is made first.     

t(n)分布及其渐近性质

t(n)分布是数理统计中的一个非常重要的分布,本文详细地讨论了它的性质,并作出了归纳和证明,特别是分别利用Stirling公式、定积分公式以及概率论中的收敛性从不同的角度证明了它的著名的渐近性质,并指出了t(n)分布和标准正态分布之间存在的差异。