论珠算教练学（续）

在工厂里，师傅带徒弟实质是一个教练过程；母亲教孩子洗衣、做饭，也是一个教练过程。教和练是人们生活中、生产中一个很普通的问题。在现代，生产需要竞争；体育需要技能的角逐；科学需要智力的竞赛；计算需要竞技．……。这些都需要我们从原始的教练方式转化成科学的指导方式。这就是产生教练学的社会基础和需要。     

Holographic and Thermal-Fixing Characteristics of Doubly Doped Zn：Fe：LiNbO3 Crystals

We perform a comprehensive experimental study on holographic and thermal-fixing characteristics of Zn：Fe：LiNbO3 The measured hologram decay time constants, respectively caused by optical readout and under dark condition, with thermal fixing are 15 times and 75 times longer than that obtained without thermal fixing. This suggests that Zn：Fe：LiNbO3 crystals are suitable for thermal fixing. Multiplexed recordings of 300 holograms using different thermal fixing schemes verify that a proper multiplexing scheme such as track-division thermal-fixing scheme for disc-type holographic storage can effectively compensate for the negative effect of zinc-doping on the dynamic range, thus the storage density is enhanced.     

高温超导材料制备中化学动力学的研究

在可靠实验事实的基础上,提出三条基本假定,指出制备超导体形成各相的控制因子是形成相应活化络合物的能垒ΔU_0~≠它可在实验中使其改变,从而达到可控制某超导相的形成,为改善材质和探索超导新体系提供了初步的理论依据.用本文的论点,可以统一解释制备各种超导材料中出现的有关现象.     

光学神经网络中硬件误差对性能影响的分析

利用统计方法，分析了光学硬件误差对用Ｈｏｐｆｉｅｌｄ神经作联想记忆时出错率的影响，导了系统的误差与错率关第的近似公式，并给出了模拟结果。得到了一定限度的误差对出错率的影响并不显著的的结论，特别坚探讨测器阵列动态范围的要求，可以远远小于其探测到的最大值。这对光学神经网络系统的设计及硬件的选取，具有指导意义。     

Possible Experimental Evidence of a Moderate Proton Halo in ^29S

The total reaction cross sections (TRCSs) of^29S ^28Si have been measured at intermediate energies. An obvious enhancement in TRCS of ^29S is observed as compared with its neighbouring nuclei. The TRCSs of ^29S ^28Si arecal culated with the modified Glauber theory in the optical limit and few-body approaches. The different factor d as a possible measure of halo appearance is deduced from the experimental and theoretical data. It is well accepted that ^27p is a proton halo nucleus. Although not as anomalous as ^27p, the different factor d of ^29S is obviously larger than that of its neighbouring isotones of N = 13. This result indicates that a moderate proton halo may exist in ~9S nucleus. We calculate the total reaction cross sections for ~9S with the modified Glaubertheory as a function of incident energy and compare the results with those for 2rSi which is a core nucleus 0f29S.The measured TRCSs of 27Si4-2SSi can be described to be satisfactory by the modified Glauber theory of theoptical limit approach. Although a diffused nuclear density distribution is used, the theories still inadequatelypredict the experimental TRCSs of 29S4-2SSi, which further indicates the possibility of proton halo in 29S.     

双曲线的定值问题的应用拾零

双曲线的定值问题的应用拾零玉邴图（云南广南一中６６３３００）本文介绍双曲线的几个定值问题，并举例说明它们在解题中的应用．问题１ＡＢ是过双曲线ｂ２ｘ２－ａ２ｙ２＝ａ２ｂ２中心Ｏ的弦，Ｐ是双曲线上任一点，则ｋＰＡ·ｋＰＢ为定值．证设Ｐ，Ａ的坐标分别为（ａ...     

缓蚀剂对金属钆在水介质中腐蚀行为的影响

采用失重法、腐蚀电化学方法研究了NaOH、NH4OH、单宁酸和苯并三氮唑等缓蚀剂对金属钆在水介质中腐蚀行为的影响。在没有缓蚀剂的情况下,钆在水中发生明显的点蚀,腐蚀速度为0.152g.m-2.h-1。NaOH能有效地控制金属钆在水介质中的腐蚀,经8880h的长时间浸泡,钆表面依然呈现明显的金属光泽,没有失重与点蚀发生。当采用NaOH调节苯并三氮唑(BTA)溶液的pH值接近中性时,钆在其中长时间浸泡,同样没有失重发生,表观没有发现点蚀发生。选择合适的缓蚀剂,使得钆能够在水介质中不发生腐蚀,保证了磁制冷机的长时间正常运转。     

用手性醇改性的LiAlH4对芳香酮的不对称还原反应

用１，２，５，６－二丙酮甘露醇与ＬｉＡｌＨ_４及手性一元醇在室温下形成的络合物对苯乙酮和苯丙酮在不同温度下进行不对称还原，得到光学活性醇，旋光产率在６．６～４４．４％之间。     

氨肽酶N荧光探针的研究进展

氨肽酶N(aminopeptidase N,APN)是一种外肽酶,广泛存在于哺乳动物体内,可从蛋白质多肽链的N末端水解中性或碱性氨基酸,在人体中具有多种重要的生理功能。APN可作为癌症诊断的标志物,尿液中APN也可作为肾小球肾炎的早期生物标志物。本文综述了APN荧光探针的研究进展,主要包括亲和力型APN荧光探针和反应型APN荧光探针,并对它们的优缺点进行了比较;最后对APN荧光探针的发展前景进行了展望。     

选择性识别儿茶酚胺的长波长二硼酸荧光探针

儿茶酚胺是人体中重要的神经递质.选择性识别儿茶酚胺对帕金森氏综合症、嗜铬细胞瘤、神经母细胞瘤等疾病临床诊断及病理学研究具有重要意义.2-(4-二羟基硼烷)苯基喹啉-4-羧酸(PBAQA)与糖结合后荧光强度增强,与儿茶酚胺结合后荧光强度下降,可以作为选择性识别儿茶酚胺的荧光探针.但由于发射波长较短,PBAQA及其衍生物在荧光成像方面存在诸多限制.本文作者采用廉价易得的原料制备中间体PBAQA,然后经酰胺缩合、脱保护,制备氨基中间体,再与3-羧基硼酸缩合合成二硼酸.目标化合物的发射波长明显红移至500 nm左右,斯托克位移超过100 nm.初步活性测试发现,目标化合物与儿茶酚胺结合后荧光强度明显降低,且荧光强度改变与儿茶酚胺浓度存在线性关系,可作为选择性识别儿茶酚胺的长波长荧光探针.