“代际公平”问题的测定和对策研究

资源短缺和能源危机问题日益严重,这使得全世界都将目光集中在可持续发展理论的研究上。指出代际公平是衡量可持续发展实现的标准之一,回顾了测定代际公平的不同方法,建立了资源与财富代际公平判别模型,并在此基础上提出了实现代际公平的对策和机制。     

Bipolaron in different configuration of quantum confinement

The authors used Landau-Pekar variational method to investigate a strong-coupling singlet optical bipolaron in different configuration of quantum confinement. Numerical and analytical results showed that when configuration changes from quantum dot and wire to well, confinement shows different effect on the formation of a bipolaron. In contrast to a bipolaron in a quantum dot or wire, the binding energy of a bipolaron in a quantum well increases with increasing con-finement, indicating that confinement favors bipolaron formation in a quantum well.     

Low pH-induced conformational changes in 33 kD protein of photosystem Ⅱ

33 kD protein, located on the lumen side ofthylakoid membranes, is one of three extrinsic proteins ofphotosystem Ⅱ (PS Ⅱ ). Previous study showed that NBSmodification of W241, the only tryptophan in 33 kD protein,is helpful for understanding the function of W241 in main-taining functional conformation of 33 kD protein. In thispaper, studies of both circular dichroism and fluorescencespectra showed that upon decreasing pH from 6.2 to 2.5, theconformation of soluble 33 kD protein changed significantly,with an increase or a decrease in percentage of random coilor (z-helix and turns. The changes in secondary structures ofthis protein are pH reversible. After NBS modification at pH2.5, the conformational change of 33 kD protein was keptfixed. The CD ellipticity at 200 nm for NBS-modified 33 kDprotein is much lower than that for control, indicating that the unfolding degree of 33 kD protein was enhanced after the NBS modification. Moreover, the conformational flexibility islost in NBS-modified 33 kD protein, and the conformationalchange becomes pH irreversible, indicating that NBS modi-fication blocked the reversibility of conformational change of33 kD protein. The specific binding capability of NBS-modi-fled 33 kD protein is much lower than that of low pH-treatedcontrol. Furthermore, the rebinding of modified protein on PS Ⅱ membranes cannot restore the activity of oxygen evo-lution. We suggest that it is low pH but not NBS modificationof W241 that leads to the conformational change of 33 kDprotein from one functional to another non-functional state.The significant capability of proton transport of 33 kD pro-tein is discussed.     

浙江常见几种蝙蝠的心电图研究

本文报导浙江常见七种蝙蝠的心电图,均由p波、QRS波群及T波组成。有关心电图的参数存在着种间、性别和气温不同而出现的差异。     

Na_5Ho(WO_4)_4晶体的生长、结构及光谱性质

用助熔剂缓冷法培养出化学计量比的发光单晶体Na_5HO(WO_4)_4。该晶体属四方晶系,I4_1/a空间群,晶胞参数为a=11.437(?),c=11.336(?),c/a=0.991。测定了该晶体室温下的反射光谱、激发光谱及荧光光谱。观察到Ho~(3 )离子的~5S_2—~5I_8跃迁的强黄绿色荧光发射。     

关于发展县域经济的思考

以公有制为基础的社会主义市场经济，是实现由计划经济向市场经济、由粗放经营向集约经营两个根本性转变的前提。文章指出，发展我国国民经济必须走因地制宜的县域经济发展之路，并提出了发展县域经济应采取的策略和措施     

热锻过程中工模具温度场的有限元迭代解法

热锻过程中温度对成形过程的影响是显著的，了解热锻过程中工模具内温度场的分布对控制锻件的成形是有益的，工模具的热传导问题，由于热性能参数随温度变化和／或存在辐射换热，所以是一个非线笥瞬态问题，本文提出求解此问题的有限迭代解法，用此算法分析了热锻过程中的对模阶段的工模具温度变化，并给出了它们的温度场分布。     

吡咯烷生物碱新手性合成子的合成

报道了从（Ｓ）－苹果酸出发，立体选择性地合成五个新吡咯烷生物碱手性合成子．观察到Ｃ＿４－位上保护的羟基对Ｃ＿５－位手性中心的形成具有良好的不对称诱导作用．     

指数函数e^x的高阶有理分式近似

构造了指数函数ｅｘ的任意高阶有理分式近似类，给出了它Ａ－可接受的准则及其误差项的精确表达式，为构造常微数值方法提供了新的有效途径．．     

阻抗圆图法测量双极型晶体管EM_2模型参数r′_b,r′_e及τ_F

在双极型晶体管EM_2模型参数中引入的基极电阻r'_b是重要的也是较难测量的参数之一。本文报导了用阻抗圆图法测量晶体管在小讯号正向运用时的基极电阻r'_b,发射极电阻r'_e以及r'_b和r'_e随工作点的变化。并用圆图法求得正向渡越时间τ_F。