Genetic Diversity in Populations of Sepiella maindroni Using 16S rRNA Gene Sequence Analysis

Part of the 16S rRNA gene is amplified with PCR and sequenced for 5 populations of common Chinese cuttlefish Sepiella maindroni:three from the South China Sea,one from East China Sea and one from Japan.The result shows that a total of 5 nucleotide positions are found to have gaps or insertions of base pairs among these individuals,and 13 positions are examined to be variable in all the sequences,which range from 494 to 509 base pairs.All of the individuals are grouped into 7 haplotypes (h1-h7).No marked genetic difference is osberved among those populations.All of the individuals from Nagasaki belong to h1 and the h3 haplotype is found only in the coastal waters of China.A→←G transition in Nucleotide 255 is suggested to be taken as a kind of genetic marker to identify the populations distributed in East-South China Sea and the Nagasaki waters of Japan.     

C_0-半群的脉冲扰动与一类半线性脉冲发展方程(英文)

研究无限维Banach空间中一半群的脉冲扰动及一类非线性脉冲系统的温和解的存在性、唯一性、正则性和连续依赖性,最后给出例子加以说明。     

Land vehicle positioning using GPS and dead reckoning

To ensure reliable land vehicle positioning, the Global Positioning System (GPS) is one of the best techniques commonly used in present-day positioning systems. However, GPS signals are not available if line of sight with the satellites is lost. In this respect, the addition of the Dead Reckoning (DR) method to complement the GPS unit would enhance the reliability of land vehicle positioning system. For implementing the DR method, the magnetic sensor and accelerometer are used for obtaining heading and velocity or distance information. Calibration of two sensors' dynamic model and DR algorithm are also introduced in this paper. The test result utilizing the GPS and DR methods is analyzed in this paper. It utilize spositioning information from GPS receiver when GPSsignal is available, otherwise DR is started to compensate GPS outage with the GPS output as the original point. The results showed that the error in east and north produced by the DR algorithm for a short time interval can be limitedwithin an acceptable range.     

Combustion energies and standard molar enthalpies of formation for the complexes of the first-row transitional metal chlorides withL-α-histidine

Seven novel solid complexes of the first-row transitional metal with L-α-histidine were synthesized, and their compositions were determined. The constant-volume combustion energies of the complexes were measured by a precision rotation bomb calorimeter. The standard molar enthalpies of combustion and the standard molar enthalpies of formation were calculated. The results indicated that the plots of the standard enthalpies of formation against the atomic number of the metal show a regularity of zigzag.     

系统视角的企业战略研究方法论

本文介绍了评论式系统思考 (CST)以及全面系统干预 (TSI)的基本思想 ,将CST和TSI引入战略方法论的研究 ,从系统的视角为战略研究方法论的综合集成与创新开辟了一条新的思路。     

Temperature variations on the Tibetan Plateau over the last two millennia

The paleoclimate data recovered from ice cores,tree rings and lake sediments indicate regional features of cfimatic change on the Tibeta n Plateau (TP) during the last 2000 years. The composite temperature reconstructions in-dicate that several main climatic episodes, such as the “LittleIce Age“ between 1400 and 1900, the “Medieval Warm Pe-riod“ in 1150-1400, a less warm period in 800-1100, and an earlier cold period between the 3rd and 5th centuries,occurred in the TP. In addition, temperature varied from region to region. The period from AD 800 to 1100, which waswarm in northeastern TP, was contemporaneous with cool-ing in the western and southern TP. The southern TP ex-perienced warming between 1150 and 1400. For western TP,the δ^18O records of the Guliya ice core indicate that the pe-Hod 1250-1500 witnessed a clear warming. Large-scaletrends in the temperature history from northeastern TP aremore similar to those in eastern China than are the trendsfrom the Guliya ice cap far to the west and southern TP. The most prominent similarities between the temperature varia-tions of the TP and eastern China are such cold phases as 1100-1150, 1500-1550, 1650-1700 and 1800-1850, andthe latter three cold events match with three widespreadg lacial advances which occurred on the TP during the Little Ice A2e.     

考虑钢框架节点局部断裂的滞回模型

在杆端多弹簧弹塑性模型中引入了断裂机制 ,采用根据J积分撕裂模量法建立的判别裂纹失稳的失效评定图设定模型参数 .通过和有关试验结果的比较 ,验证了建立的模型及算法可以充分反映局部断裂后节点滞回性能的主要特点 .根据若干算例结果 ,归纳出适用于整体结构分析的考虑节点局部断裂的非线性弹簧模型     

60Si2CrVA弹簧钢热处理工艺及性能研究

主要研究了 60Si2 CrVA弹簧钢的热处理工艺与性能的关系 ,通过采用不同加热时间淬火和不同温度下回火实验 ,测定其硬度和机械性指标并观察其金相组织 ,从而找出该钢种最佳热处理工艺以及最佳综合机械性能并得到回火系列金相图谱 .     

太原市发展屋顶绿化应注意的若干问题

屋顶绿化是我国城市建设的一个崭新亮点，它既有增加城市绿地面积、发挥生态林业的作用，又有美化城市、为居民提供活动场所的功能。简要介绍了国内外屋顶绿化的发展状况，分析了太原市发展屋顶绿化的技术难点，提出了地毯式、花槽连网架式、花园式3种屋顶绿化模式，并建议就不同模式进行试点。     

表面波法在防渗墙质量检测中的应用研究

本文建立了平面应力问题的波动方程，推导了防渗墙（平面应力问题）中瑞利波特征方程，通过算例与平面应变问题中瑞利波特性进行了比较。本文介绍了防渗墙质量检测的一种方法：表面波法，对它的测试原理作了进一步的研究。利用超声波跨孔法和表面波法对某实际工程进行了检测，经过实例证明超声波跨孔法和表面波法相结合可准确检测防渗墙的质量，并且可降低大量的检测费用。