白光干涉条纹变密的原因探讨

讨论了在测定透明介质折射率的过程中彩色条纹变密的现象，并在其基础上分析其成因：一是由于媒质折射率加大；二是由于平形板介质平行度不好造成楔形的倾角变大，最后在实验中验证了理论结果。     

近代洞庭湖沉积与孕灾环境研究

通过对洞庭湖区不同沉积部位的22个钻孔取样和^210Pb放射性同位素测年分析，洞庭湖有较高的沉积速率，最高可达2．33cm／a，不同的沉积部位沉积速率也有较大的差异。由于19世纪以来四口分流形成，大量长江的泥沙进入洞庭湖，近50年的水文资料表明，洞庭湖83％的泥沙淤积来源于长江。由于人类围垦、上游森林砍伐和洲滩堤坝的逐年加高，洞庭湖水面减少了2／3，洞庭湖对长江洪水的调蓄能力已迅速减弱。洞庭湖的演变变化过程直接影响到长江中游的生态安全。     

强分次环与Maschke-型定理

设G是有限群,|G|^-1∈R.本文证明了与强G-分次环R,R#k[G]^*,非分次R-模和R_e-模有关的两个Maschke-型定理.     

偶氮苯化合物的合成及在新体系催化光度分析中的应用

研究了催化光度法分析指示物的合成 ,探讨了在硫酸介质中铜 (Ⅱ )催化抗坏血酸和 3 甲基 4 氨基 4′ 硝基偶氮苯的还原褪色反应 ,优化了反应条件 ,建立了一种高选择性的测定痕量铜的新方法 ,方法的检出限为 4 8× 10 - 2 μg·L- 1 。用于人发样及铝合金样中铜的测定 ,结果满意。     

Synthesis of 4,6-disubstituted pyrimidines via Suzuki and Kumada coupling reaction of 4,6-dichloropyrimidine

A series of 4,6-disubstituted pyrimidines were synthesized via Suzuki and Kumada coupling reaction of 4,6-dichloropyrimidine.     

开关型霍尔传感器的原理与工程实现

介绍了开关型霍尔传感器的工作原理，设计了适用于工程测量的具体线路，并分析了该线路的特点。     

The fabrication and characterization of poly(lactic acid) scaffolds for tissue engineering by improved solid–liquid phase separation

In this article a new technique was developed to fabricate scaffolds with a unique microstructure by solid–liquid separation in combination with particulate-leaching. Firstly, the effects of polymer concentration, quenching temperature on the porous morphology and the mechanical property of obtained scaffolds during solid–liquid separation have been investigated. Then, salt granules as porogen were introduced into the solid–liquid phase separation to produce the unique pore structure of the scaffold. The pore diameter of the scaffold could be controlled with the particulate size and the wall of pores possessed special microstructure, which enhanced the pore interconnectivity. The cell culture results confirmed that a good interconnectivity of the scaffold prepared by the improved solid–liquid separation was useful for nutrition transportation and cell proliferation. Copyright © 2003 John Wiley & Sons, Ltd.     

光纤陀螺信号处理中SLD驱动电路设计

光纤陀螺用光源要求输出功率高、相干性低、稳定性好，超辐射发光二极管（SLD）是能满足这些要求的理想光源，目前国内光纤陀螺用的光源基本上主要选择超辐射发光二极管（SLD），从工程实际应用出发，介绍了超辐射发光二极管（SLD）驱动电路设计，以此来提高光纤陀螺性能。     

Henry Reaction in Aqueous Media：Chemoselective Addition of Aldehydes

The chemoselective addition of aldehydes in aquoues medium was obtained under mild condition using improved Henry reaction.