一类φ-强增生算子方程解带误差的Ishikawa迭代逼近

在任意实Banach空间中引入了一类φ-强增生算子的概念，提出了一个新的带误差的Ishikawa迭代序列，研究了实Banach空间中一类强增生算子方程解的带误差的Ishikawa迭代序列的收敛性问题，这些结果推广和改进了最新文献相应的结果．     

Mn-Zn铁氧体纳米晶体的制备及吸波性能研究

用溶胶-凝胶自燃烧法制备了Mn-Zn铁氧体纳米晶体,用TG-DTA,FT-IR和XRD等3种分析方法研究了其制备工艺.将所得Mn-Zn铁氧体纳米晶体制成吸波涂层,研究其对雷达波吸收特性.结果发现：与非纳米（微米级）吸波剂相比,纳米Mn-Zn铁氧体吸波剂的吸波性能显著高于前者.     

基于S3C2410控制的CAN总线接口设计

采用Samsung公司32位ARM9核的S3C2410微处理器与Philips公司的经典CAN控制器SJA1000进行接口设计,分析了SJA1000读写时序,并给出了硬件电路原理图和SJA1000的驱动程序流程图,应用在嵌入式测控系统中,取得了良好的数据传输效果.     

推拿点穴治疗失眠的临床体会

失眠是指以经常不能获得正常睡眠为特征的一种病症,由于现代生活节奏加快,心理负担加重,本病的患病率日益增高。笔者在临床中用放松推拿治其标,指针疗法治其本,标本兼治,效果满意,且易于被患者接受。     

磁共振成像中涡流效应的仿真

为研究涡流对磁共振(MRI)图像的影响,提出了MRI中涡流效应的仿真方法。在基于Bloch方程的仿真方法的基础上增加描述涡流的数学模型从而实现MRI中涡流效应的仿真。为验证仿真结果,首先在一台0.3T永磁MRI系统上测量了涡流模型的参数,然后在该系统上设计并实现了带有附加梯度的自旋回波(SE)序列用以显示零阶涡流的影响。仿真图像和实际图像均显示了和理论分析相符的混叠伪影,同时利用仿真程序补偿实际接收信号,可以明显地减小重建图像的伪影。以上实验结果验证了仿真程序的正确性。     

约束线性二次优化控制的多参数规划求解

针对求解约束线性二次优化控制问题,结合动态规划和控制时域长度为1的单步多参数二次规划,提出一种新的多参数规划方法。该方法一方面能够快速求解得到约束线性二次优化控制问题最优解与状态之间的显式函数关系,减少多参数规划问题求解的工作量;另一方面,能够同时求解得到显式分段线性状态反馈最优控制律。应用高频机械振动系统数值仿真例子,对该文的方法进行了数值仿真计算。仿真结果表明该文提出的方法是有效的。     

Dense fog events in the Yangtze Delta and their climatic characteristics

Based on daily observation records of fog and atmospheric visibility from 24 meteorological stations in the Yangtze Delta in the period from 1954 to 2005,the identification standard of dense fog events(DFE)has been proposed in this paper,a quite complete time series of DFEs for the delta constructed,and the climate characteristics of these events analyzed sequentially.Preliminary results showed that there were 564 typical DFEs in the delta from 1954 to 2005.The most frequent season for DFEs was from October to next April,when the number of the events accounted for 89.9% of the annual total,while the least frequent season was summer,when the number only accounted for 1.6% of the total due to higher temperature and more convective weather in the season.In the Yangtze Delta, DFEs occurred less and were weaker in the 1960s,but turned to increase from the end of the 1970s to the beginning of the 1980s,with an abrupt change in 1978.Afterwards,DFEs occurred more frequently,intensively,and indeterministically,and in particular,most fre- quently in the 1980s and intensively in the 1990s.However both the frequency and intensity of DFEs decline apparently in the period of 2000—2005 in the delta.     

Detection of low enersy solar neutrinos by a two-phase cryosenic e-bubble detector

A new two-phase cryogenic neutrino detector using electron bubble （e-bubble） specifically in liquid helium is proposed and being developed for real time, high rate measurements of low-energy p-p reac- tion neutrinos from the sun. The e-bubble detector is a time projection chamber-like （TPC） tracking detector. The task of such a neutrino detector is to detect the ionization of the elastically scattered target electrons by incident neutrinos, and then to characterize their energy and direction and to dis- tinguish them from radioactive backgrounds. The ionization signals are expected to be small and hence undergo avalanche amplification in the saturated vapor above the liquid phase by gas electron multi- pliers （GEMs） at high gain. Higher granularity and intrinsically suppressed ion feedback give a good spatial resolution and are the major advantages of this technology. It should be possible to construct such a detector to track charged particles down to 100--200 keV in a massive liquid helium target with fractional millimeter spatial resolution in three-dimensional space, using the GEM-based TPC with a high-resolution CCD camera, for both the electronic and light readout.     

课件写作系统CAS的设计与实现

课件写作系统CAS是提供给教师用以制作教学课件的软件工具 ,它是在Windows环境下采用面向对象的方法进行分析和设计并用C + +编程语言实现的 .面向对象的方法的最主要的特点就是利用特定的软件工具直接完成从对象客体的描述到软件结构之间的转换 ,解决了结构化开发方法中客观世界描述工具与软件结构不一致的问题 .CAS的应用程序是一个以消息驱动的、以窗口对象为组织单元的系统 .     

硒代吗啉衍生物的合成及抑菌活性

硒是人体必需的微量元素 ,现已发现与硒有关的人类疾病有四十多种 ,尤其是一些严重影响人类健康的多发病、常见病 ,如心脑血管疾病、癌症、糖尿病、炎症和免疫系统功能紊乱等 [1,2 ]和地方性缺硒症如我国的克山病及大骨节病等 [3 ] .近年来的研究发现硒是一些酶的活性中心 ,这