超声对细胞膜通透性的影响及应用

适当参数的超声，使细胞膜发生可以修复的损伤，使细胞膜的通透性提高，从而使细胞内的物流释放到细胞外，细胞外的物质进入细胞内，这一现象可以用于释放代谢产物或中间产物，基因转导，强化化学方法治疗肿瘤等方面。  

超声波防除积垢节能技术及设备开发

传热设备的积垢问题一直是人们急于解决的一大难题，不仅影响热能利用和生产正常运转，而且会降低产品质量，增加生产成本。通过机理研究、室内试验和工厂试验，揭示了超声波防除积垢的机理，筛选出最佳的声场参数，研制出一种新型的超声波防除积垢设备，室内试验和工厂试验结果表明，超声波技术不但可以防止新垢的产生，而且可以有效地去除已有积垢，显著地提高蒸发系统传热系数和生产能力，可停止使用化学清洗剂，从而延长传热设备使用寿命，避免污染环境，该技术有可能广泛地应用于制糖工业、化肥工业、制浆造纸工业等诸多领域。  

时间相关外场中量子系统的辛算法

引入辅助变量将时间相关外场中量子系统的显含时间哈密顿系统转换成不显含时间的可分哈密顿系统，给出了任意阶精度的显式辛格式，计算了一维有限宽无限深势阱中的电子与模拟激光场的相互作用，结果与理论分析一致，且很好地保持了波函数模方归一，表明该方法适于计算激光场与原子的相互作用。  

物理场防除积垢节能技术

化工生产过程换热设备积垢的防除一直是普遍存在且难以解决的问题，目前采用的防除积垢的方法是化学法或化学与机械相结合的方法，它们都有各自的不足之处，文章在调查国内外关于物理场防除积垢节能技术研究成果的基础上，较详细地介绍了该技术的原理和应用现状，并展望了今后的发展方向。  

超声波防除积垢节能技术及设备开发(续)

(接上期第11页)进行方差齐性检验:选择显著性水平为 α=0.05,查 F分布表得,  

一维强场模型研究中的非齐线性正则方程的辛算法

就一维强场模型，采用对称差商代替空间变量的2阶偏导数，将含有Schroedinger方程的初边值问题离散成“非齐线性正则方程”，它的齐方程的通解和非齐方程特都由“辛变换生成”，分别采用辛格式计算。采用这种辛算法和R-K法计算了一个数值例子，并与精确解作了比较。结果表明，经长时间计算后，辛算法保持解的固有特征，而R-K法则面目全非。  

强激光场中一维原子的渐近边界条件

用Fourier变换推导了强激光场中一维原子模型的渐近边界条件，分析了三类渐近边界条件的误差，用第一类渐近边界条件和非齐线性正则方程的辛算法计算了强激光场中一维氢原子的几率分布和平均能量，并将结果与理论分析进行了比较．  

A digital CDS technique and its performance testing

Readout noise is a critical parameter for characterizing the performance of charge-coupled devices (CCDs), which can be greatly reduced by the correlated double sampling (CDS) circuit. However, a conventional CDS circuit inevitably introduces new noise since it consists of several active analog components such as operational amplifiers. This paper proposes a digital CDS circuit technique, which transforms the pre-amplified CCD signal into a train of digital presentations by a high-speed data acquisition card directly without the noisy CDS circuit, then implements the digital CDS algorithm through a numerical method. A readout noise of 3.3 e^- and an energy resolution of 121 eV@5.9 keV can be achieved via the digital CDS technique.  

Measurements of charge transfer efficiency in a proton-irradiated swept charge device

Charged Coupled Devices(CCDs) have been successfully used in several low energy X-ray astronomical satellites over the past two decades. Their high energy resolution and high spatial resolution make them a perfect tool for low energy astronomy, such as observing the formation of galaxy clusters and the environment around black holes. The Low Energy X-ray Telescope(LE) group is developing a Swept Charge Device(SCD) for the Hard Xray Modulation Telescope(HXMT) satellite. A SCD is a special low energy X-ray CCD, which can be read out a thousand times faster than traditional CCDs, simultaneously keeping excellent energy resolution. A test method for measuring the charge transfer efficiency(CTE) of a prototype SCD has been set up. Studies of the charge transfer inefficiency(CTI) with a proton-irradiated SCD have been performed at a range of operating temperatures. The SCD is irradiated by 3×108cm-210 MeV protons.  

Proton irradiation effect on SCDs

The Low Energy X-ray Telescope is one of the main payloads on the Hard X-ray Modulation Telescope satellite.Swept charge devices(SCDs)are selected as detectors for the Low Energy X-ray Telescope.As SCDs are sensitive to proton irradiation,irradiation tests were carried out on the HI-13 accelerator at the China Institute of Atomic Energy.The beam energy was measured to be 10 MeV at the SCD.The proton fluence delivered to the SCD was 3×108protons/cm2over two hours.By comparing the performance before and after irradiation,it is concluded that proton irradiation affects both the dark current and the charge transfer inefficiency of the SCD.The energy resolution of the proton-irradiated SCD is 212 eV@5.9 keV at-60?C,while it before irradiated is 134 eV.Moreover,better performance can be reached by lowering the operating temperature of the SCD in orbit.