Visual C++与Delphi/C++Builder之比较及未来的发展前景

从应用程序框架、易用性和可移植性3方面对Visual C＋＋与C＋＋ Builde，进行了比较，分析了Visual C＋＋与C＋＋ Builder的发展前景。     

Visual C++与C++Builder的比较

C＋＋Builder和Visual C＋＋是目前比较流行的面向对象的程序设计语言，从应用程序框架、易用性、可移植性、应用前景等方面对C＋＋Builder和Visual C＋＋进行了对比分析。     

《C＋＋程序设计》课程教学方法研究

C＋＋程序设计是学习计算机语言的重要课程,本文对C＋＋程序设计的教学方法进行了探讨,在提高学生学习兴趣、加强实验环节、改进考核方式等方面提出了几点意见。     

Ｃ＋＋中运算＋＋的机器实现

从Ｃ＋＋中＋＋运算符中的机器实现层面探讨＋＋的确切含义,从而提出进一步规范＋＋运算符的使用建议;同时指出,从机器实现的角度揭示高级语言中的某些肄难点具有普遍意义。     

基于Insure＋＋的软件内存使用测试

本文简要介绍了一种针对C/C＋＋程序代码进行自动检测的工具Insue＋＋,包括其运行环境、两种基本的工作模式,以几段简单的程序代码为例,演示了Insue＋＋能够检测出的典型内存使用错误,并对其出具的问题报告进行分析。     

基于VC++的DXF数据文件接口的研究

研究了VC＋＋与CAD之间数据交换时的接口技术．根据DXF文件格式，结合VC＋＋技术的图形处理、数据管理功能，本文开发设计出数据交换接口程序，可以在VC＋＋程序中实现对CAD图形的调用以及二次开发．实例证明：该方法方便、快捷、实用．     

基于MapInfo的MapX开发平台

本文介绍了MapInfo及MapInfo和MapX之间的联系，阐述了在Visualc＋＋环境下MapX应用程序的生成；在Visualc＋＋环境下，访问MapX的属性和方法，从而实现Visualc＋＋和MapX的关联，，在Visualc＋＋环境下，构建了基于MapInfo的MapX开发平台。     

基于VC＋＋的数据库开发

本文结合实际例子,介绍了基于VC＋＋6.0中自带的ADO建立数据库的基本步骤,说明了VisualC＋＋下对数据库类访问的方法。最后简要介绍了封装ADO类的主要构成。     

电厂生产管理信息系统BFS＋＋实施研究

为了使电厂生产管理信息系统BFS＋＋在电厂得到快速地应用,本文着重介绍了BFS＋＋在火电厂实施的全过程,结合内蒙古乌海海勃湾热电厂、包头第二热电厂和临河热电厂现场实施的各种经验和教训,总结出了一套BFS＋＋的实施流程和相应方法,对其他电厂的BFS＋＋顺利实施工作起到了一定的指导作用。     

正则表达式的实现

正则表达式提供了功能强大、灵活而又高效的方法来处理文本。论述了如何用C＋＋语言实现基于正则表达式的查找和替换。     

岩石对Zn^2＋、Pb^2＋的竞争吸附特征

采用紫外一可见分光光度法以及原子吸收分光光度法,对岩石静态吸附Pb^2 、Zn^2 的特征进行了研究,结果表明,砂岩从含Zn^2 的溶液中吸附Zn^2 、从Pb^2 和Zn^2 混合溶液中吸附Pb^2 和Zn^2 以及角砾岩从Pb^2 和Zn^2 混合溶液中吸附Pb^2 的过程均是类分形的;角砾岩和砂岩对铅的吸附速率大于锌,在铅存在的情况下锌的吸附能力减弱;角砾岩和砂岩对铅离子的吸附量相差不大,但角砾岩对锌离子的吸附能力强于砂岩。     

GdBO_3中Bi~(3+)、Sm~(3+)的发光和能量传递

研究了在紫外光(UV)激发下,Bi~(3+)、Sm~(3+)单掺杂和共掺杂的GdBO_3的发射光谱、激发光谱及发光强度随组成变化的规律。发现在GdBO_3:Bi,Sm体系中,Bi~(3+)和Gd~(3+)对Sm~(3+)的发光均有敏化作用。Bi~(3+)的绝大部分能量是通过Bi~(3+)→Gd~(3+)→(Gd~(3+))_n→Sm~(3+)途径传递给Sm~(3+)的,Gd~(3+)在能量传递中起中间体作用。研究了Bi~(3+)→Sm~(3+)的能量传递机理为电偶极—电偶极相互作用的共振传递。根据406nm激发下GdBO_3:Sm体系中Sm~(3+)发光强度与浓度的关系,证明了Sm~(3+)自身浓度猝灭的机理也为电偶极—电偶极相互作用。     

在Sr_3Ca_2(PO_4)_3Cl基质中Tb~(3+)和Dy~(3+)的发光及Ce~(3+)对它们的敏化作用

本文用高温固相扩散法合成了试样。研究了在Sr_3Ca_2(PO_4)_3Cl基质中,Tb~(3+)和Dy~(3+)离子的发光性质;Ce~(3+)对Tb~(3+)和Dy~(3+)离子发光的敏化作用;计算了Ce~(3+)→Tb~(3+)和Ce~(3+)→Dy~(3+)的能量传递效率;初步探讨了Ce~(3+)→Tb~(2+)和Ce~(3+)→Dy~(3+)之间的能量传递机理。     

富贵籽无菌苗诱导愈伤组织及其优化培养

以富贵籽的无菌苗为试验材料,开展了诱导愈伤组织及其优化培养的研究。结果表明:(1)MS+2,4-D 1.00+BA 0.01的培养基配方能较好地诱导富贵籽种子产生无菌苗;(2)MS+NAA 1.00+BA 0.05、2,4-D 2.00+BA 0.05、NAA 2.00+BA 0.05和NAA 0.1 0+BA 3.00的培养基配方分别适合富贵籽的无菌苗根、茎、芽和叶诱导愈伤组织;(3)MS+NAA 0.10+Zeatin 2.00的组合和MS+2,4-D 0.10+BA 2.00的组合的培养基配方可使富贵籽的愈伤组织表现出生长速度快、质地疏松、色泽润滑、形态饱满等优良性状。     

多种金属离子对白蜡虫碱性磷酸酶活性的影响

研究了多种金属离子对白蜡虫碱性磷酸酶活性的影响。结果表明：Li^ ,Na^ ,K^ 对酶活力没有影响，Ca^2 ，Mg^2 ,Ba^2 ,Mn^2 ,Co^2 有激活作用；而Zn^2 ,Cu^2 ,Cd^2 ,Pb^2 有抑制作用，Ca^2 是有效的激活剂，表现为非竞争性激活效应，Cu^2 为有效的抑制剂，表现为非竞争性抑制效应，酶液经EDTA透析处理后活力完全丧失，失活的酶可用加入Zn^2 和Ca^2 复活。     

Glucose-induced Ca2+ signals in rat pancreatic β cells

Using microfluorometry to assay intracellular Ca2+ , the influences of varied factors on glucose induced Ca22+ signals, such as glucose-induced initial decline phase (GIDP), Ca2+ oscillation, and Ca2+ release from internal stores, were investigated in single rat pancreatic β cells. Glucose was able to evoke GIDP even at non-stimulus concentration (5 mol/L), which is insufficient to induce Ca2+ spikes. GIDP was dependent on neither membrane depo larization nor extraeellular Ca2+ . However, GIDP was inhibited by thapsigargin, indicating a dependence on Ca2+ up take by Ca22+ stores. The glucose-induced calcium oscillation was inhibited when external Ca2+ was removed. However, thapsigargin could not block the Ca2+ oscillation. These results suggest that maintenance of Ca22+ oscillation requires ex tracellular Ca2+ but not Ca2+ stores. Glucose was able to evoke Ca2+ signals even in the absence of external Ca2+ . The glucose-induced Ca2+ release from intracellular Ca2+ stores was blocked by TTX. However, TTX had no effect on high K--induced Ca2+ store release, suggesting that membrane depolarization can directly release Ca2+ from some internal Ca2+ stores in β cells.     

非洲菊常见品种的染色体核型与倍性分析

采用常规根尖压片技术对非洲菊3个常见品种的染色体进行核型分析,并用流式细胞仪检测其倍性.结果表明:供试的3个非洲菊品种均为二倍体.深圳5号核型公式为2n=2x=50=2M+34m+16sm,染色体相对长度系数组成为2n=6L+12M2+24M1+8S,按照Stebbins标准核型分类属于2C核型,不对称系数AS.K% =60.09%.香槟核型公式为2n=2x=50+B=36m+12sm+2st+B,染色体相对长度系数组成为2n=8L+10M2+16M1+16S,属于2C核型,不对称系数AS.K% =62.17% .大头粉核型公式为2n=2x=50+B=34m+12sm+4st+B,染色体相对长度系数组成为2n=8L+8M2+28M1+6S,属于2B核型,不对称系数AS.K% =62.21%.综上所述,3个非洲菊品种的染色体长度、着丝点位置、B染色体的有无均不同,核型呈现多态性.     

NH2与ClO自由基反应机理

利用量子化学理论方法。研究了与大气臭氧层损耗密切相关的自由基反应NH2＋ClO的微观机理。在密度泛函B3LYP／6-311＋G（d,p）水平上优化得到反应路径上的反应物，过渡态，中间体和产物的几何构型，并通过振动频率分析对过渡态和中间体进行了确认。在高级电子相关组态相互作用QCISD（T）／6-311＋G（d，p）水平上进行了单点能计算，得到了反应体系的势能面信息,结果表明，该反应经过缔合、H-转移和离解等过程，最终可以得到五种产物，分别为H2NO＋Cl，H2NClO，HCl＋HNO，H2＋NO＋Cl和NH＋HClO,由于形成产物H2NO＋Cl的活化势垒较低，因而是主要反应通道，而形成产物NH＋HClO的通道从动力学上看是最不利的。     

阴离子膜耦合电解氧化铈(Ⅲ) 同时析出铜粉的研究

为了解决硫酸稀土电解氧化分离铈(Ⅲ)的工业化问题,对阴离子膜耦合电化学反应氧化铈(Ⅲ)同时析出铜粉进行研究.研究结果表明:在阴极液的酸度为3～4 mol/L,电流密度适当等条件下,阴极和阳极电流效率可分别达到95%和80%,铈(Ⅲ)的氧化率大于98%,铜成粉率和成粉电流效率分别达到93%和85%;变电流电解氧化铈(Ⅲ)和同时电解氧化铈(Ⅲ)为氧化铈(Ⅳ)的能耗分别只有恒电流电解时能耗的40%和33.6%;放大试验结果与小试验结果一致;阴离子膜耦合电解氧化铈(Ⅲ)同时析出铜粉是可行的.     

Multiple intracellular signallings involved in regulation of on channels by GH releasing or inhibitory hormones in pituitary somatotropes

Influx of Ca2-via Ca2+ channels is the major step triggering exocytosis of pituitary somatotropes to release growth hormone (GH). Voltage-gated Ca2+ and K+ channels, the primary determinants of the influx of Ca2+ in somatotropes, are regulated by GH-releasing hornone (GHRH) and somatostatin (SRIF) through G protein-coupled signalling systems. Using whole-cell patch-clamp techniques, the changes of the Ca2+ and K+ currents in primary cultured somatotropes were recorded and signalling systems were studied using pharmacological reagents and intracellular dialysis of non-permeable molecules including antibodies and antisense oligonucleotides. GHRH increased both L-and T-types Ca2+ currents and decreased transient (I4) and delayed rectified (Ik) K+ currents. The increase in Ca2+ currents by GHRH was mediated by cAMP/protein kinase A system but the decrease in K+ currents required normal function of protein kinase C system. The GHRH-induced alteration of Ca2+ and K+ currents augments the influx of Ca2+ , leading to an increase in the [ Ca2+ ]I and the GH secretion. In contrary, a significant reduction in Ca2+ currents and increase in K currents were obtained in response to SRIF. The ion channel response to SRIF was demonstrated as a membrane delimited pathway and can be recorded by classic whole-cell configuration, Intracellular dialysis of anti-αi3 antibodies attenuated the increase in K + currents by SRIF whereas anti-αo antibodies blocked the reduction in the Ca2+ current by SRIF. Dialysis of antisense oligonucleotides specific for αo2 sub-units also attenuated the inhibition of SRIF on the Ca2+current. The Gi3 protein mediated the increase in K + currents and the Go2 protein mediated the reduction in the Ca2 +current by SRIF. The SRIF-induced alteration of Ca2 + and K + currents diminished the influx of Ca2+ , leading to a decrease in the [ Ca2+ ]I and the GH secretion. It is therefore concluded that multiple signalling systems are employed in the ion channel response to GHRH or SRIF in somatotropes, which leads to an increase or decrease in the GH secretion.