浅谈“网络库塘”工程在延寿县的应用

实施网络库塘工程的做法,以及在农业生中的重要举措和在抗旱、除涝方面的的作用。     

数学试题库管理系统的设计--用VB与Word2000Automation技术

文章详细介绍了数学试题库管理系统的模型设计及VBA与word2000Automation技术在其中的应用情况．此试题库管理系统具有系统管理的开放性、学科扩展的通用性、抽题方式的灵活性及排版打印的实用性等特点．     

Deposition of Diamond-Like carbon Films by High-Intensity Pulsed Ion Beam Ablation at Various Substrate Temperatures

Diamond-like carbon (DLC) films have been deposited on to Si substrates at substrate temperatures from 255℃ to 400O℃ by a high-intensity pulsed-ion-beam (HIPIB) ablation deposition technique. The formation of DLC is confirmed by Raman spectroscopy. According to an x-ray photoelectron spectroscopy analysis, the concentration of sp^3 carbon in the films is about 40% when the substrate temperature is below 300℃ C. With increasing substratetemperature from 25℃ to 400℃, the concentration of sp^3 carbon decreases from 43% to 8%. In other words,sp3 carbon is graphitized into sp^2 carbon when the substrate temperature is above 300℃. The results of xray diffraction and atomic force microscopy show that, with increasing the substrate temperature, the surface roughness and the friction coefficient increase, and the microhardness and the residual stress of the films decrease.     

C60的发现,制备,结构,性质及其潜在应用前景

Ｃ６０是碳的一种新的同素异型结构．本文综述了Ｃ６０的发现与制备方法，Ｃ６０形成的机制与其绪构特征，以及Ｃ６０的性质与其潜在的广阔应用前景．重点介绍用红外（ＩＲ）谱，１３Ｃ核磁共振（ＮＭＲ）谱和Ｘ射线衍射（ＸＤ）谱研究Ｃ６０结构的结果，及掺杂Ｃ６０固体的高温超导电性及其结构的最新研究进展．     

苏云金杆菌库斯塔变种(HD-1)对菜青虫杀虫效果的研究

通过实验室饲料感染方法和大田喷杀对比试验研究，表明发酵培养基中添加花生饼可以提高HD—1的杀虫效果，且添加浓度与HD—1菌株毒力呈正相关，用添加了花生饼的固体浅盘发酵培养液比市售工业化生产的同类杀虫剂杀虫效果要高得多。     

碳酸盐岩烃源岩有机质丰度测井评价方法

泥质碳酸盐岩生烃潜力优于纯碳酸盐岩，其有机碳丰度与泥质含量之间有明显的相关关系，而碳酸盐岩泥质含量可利用自然伽马测井资料估算。因此，建立碳酸盐岩自然伽马测井资料与有机碳含量相关性数学模型，可估算碳酸盐岩地层剖面中有机质丰度分布，从而卡取剖面中生油层厚度和计算有机碳含量的加权平均值，为碳酸盐岩地区油气资源评价快提供经济，连续的评价参数。     

Study of hot bands in the B2Σ+u-X2Σ+g system of C-2 anion

Optical heterodyne magnetic rotation enhanced velocity modulation spectroscopy was employed to observe the visible absorption spectra of the B^2Σ^+_u-X^2Σ^+_g electronic transition of C^-_2. Four hot bands (0,1), (1,2), (2,3) and (3,4) have been observed and the band (3,4) is measured directly for the first time, so far as we know, by absorption. A rotational analysis was carried out to obtain molecular constants. With the Franck－Condon principle and the vibrational Boltzmann distribution, we have estimated the vibrational temperature of C^-_2 to be about 3000K.     

C2F6分子里德堡跃迁的绝对广义振子强度测量

C2F6是一种人造气体,它在半导体工业中有着非常广泛的应用.由于它的分解率极低,所以很难把它从环境中排除掉,对温室效应的影响比较显著.采用光吸收技术和电子散射方法已对C2F6分子的电子结构进行了研究.然而,迄今为止,尚没有关于该分子的绝对广义振子强度实验测量.Lassettre及其合作者首先采用角分辨的电子能量损失谱技术用于精确的偶极振子强度测量,角分辨的电子能量损失谱仪的原理和实验方法已在其他文中作了详细的介绍[1].通过采用Bethe求和规则可独立地对任意动量转移下的广义阵子强度进行绝对定标,本次实验中谱仪的能量分辨率为0.8e…