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.     

Time-division phase modulated single-photon interference in a Sagnac interferometer

We introduce a stable, long-distance singlephoton Sagnac interferometer, which has a balanced configuration to efficiently compensate phase drift caused by change of the fiber-optic path. By using time-division phase modulation, single-photon interference was realized at 1550nm in a 5-km-long as well as 27-km-long Sagnac fiber loops,with a fringe visibility higher than 90% and long-term stability. The stable performance of the single-photon interference indicated that the time-division phase-modulated Sagnac interferometer might readily lead to practical applications in single-photon routing and quantum cryptography.     

基于B/S的客户关系管理系统的设计与实现

客户关系管理系统通过对客户详细资料的深入分析来提高客户满意程度，提高企业的竞争力，是现代企业的竞争法宝．文章以SuniAIR集团公司的客户关系管理系统开发为背景。提出了基于B／S模式的客户关系管理系统。研究并设计了其体系结构。详细介绍了其主要模块功能．该系统运行效果良好，取得了预期效果．     

pH电位法测定咪唑及其衍生物与Cu(Ⅱ)配位反应的各级稳定常数

文中利用pH电位法，在25℃，0.1mol/L KCl存在的条件下，通过测定咪唑、苯并咪唑、2-甲基苯并咪唑、2-乙基苯并咪唑和2- 丙基苯并咪唑与二价铜离子络合反应时溶液酸度值的变化，分别求算出了五种物质的加质子常数及配位反应的各级稳定常数。     

2-取代苯并咪唑衍生物的定量分析

传统非水滴定方法分析苯并咪唑衍生物的含量，由于受到杂质中胺类化合物的影响，造成结果偏高，甚至达到100%以上。文中采用薄层层析法分离苯并咪唑衍生物及杂质，首先分离出苯并咪唑衍生物，然后用非水滴定方法分析含量，得到了准确的分析结果。初步确定影响分析结果的杂质为未完全反应的原料之一邻苯二胺。     

辽宁二道沟矿床成矿物理化学条件探讨

通过对流体包裹体的研究，证实了二道沟金矿床的成矿流体盐度为０．８～１０．０ｗｔ％ＮａＣｌ；成矿温度和压力分别为２３０～２９０℃和１×１０７～２×１０７Ｐａ；成矿热液为弱酸性到弱碱性，且具有从早到晚向酸性程度降低方向演化的趋势；ｆＯ２＝３．９９９×１０－４０～１．２０２×１０－２９，ｆＳ２＝１．７４４×１０－１１～３．２５×１０－９；矿化发生在近地表的开放性裂隙系统内，为典型的浅成低温热液矿床     

单调增函数幂次积分序列的一个新结果

利用实分析中函数项级数收敛的性质，建立其相关的等式，证明了如下结果：设ｆ（ｘ）在［０，１］上单调增加并且满足下式：∫１０ｆｎ（ｘ）ｄｘ＝ｐｎ＋１，ｎ＝１，２，３，…其中，ｐ为正常数，那么有：０＜ｐ≤１且ｆ（ｘ）＝（ｘ＋ｐ－１）／ｐ，ｘ∈（１－ｐ，１）０，ｘ∈（０，１－ｐ］｛。证明具有一定的技巧性，逻辑性强，条理清楚。     

试论大学生的功能性消化不良与防治

功能性消化不良是大学生中常见的多发性心身疾病之一，常表现为一组上消化道不适的症状群．分析其发病的原因，探索其防治的有效措施，是高校医疗保健工作的重要任务之一．     

气候变化与宝鸡市粮食产量关系初探

气候变化对生态环境和农业生产有着显著的影响，利用宝鸡市１２个气象站的温度和降水资料、根据部分经验公式推导出计算粮食产量相对变率的公式，并计算了当年平均气温变化、℃、２℃、３℃，年平均降水量变化１０％、２０％、３０％的情况下的粮食产量的相对值。