双曲型方程双边值问题多重套网格差分方程的稳定性判别法

讨论了双曲型方程双边值问题多重套网格有限差分法的稳定性问题,并根据单边值问题的结果得到一些简便的稳定性判别方法,最后还附一个耦合稳定的计算实例。     

两曲揭示当今女性困境与无奈的哀歌——解读《双人床》和《爱情是脆弱的》中的女性形象

中国当代女性作家的中篇小说《双人床》和《爱情是脆弱的》，塑造了几个有着独特个性的女性形象：孤独的苏婕、无奈的陆小冰、妥协的向瑶、独特的琼林，反映了当今女性面临的困境与无奈，展现了女性在父权社会中寻求独立身份的艰难历程。     

双面铣专用机床PLC控制系统改造

主要介绍根据工件加工要求来改造某双面铣专用机床PLC控制系统的方法     

基于共享RAM的DSP与PC机之间通讯接口技术

本文主要了新型DSP与PC机之间的数据交换的共享存储器接口方式，给出了实现16位数据并行通讯的接口原理图，分析了DSP和PC机对共享存储器接口进行数据存取时可能产生的竞争问题，并给出了用中断请求逻辑电路解决问题的方案。     

Mechanism of surface texture evolution in pure copper strips subjected to double rolling

Developing ultra-thin copper foils with different surface roughness and microstructure has important significance for improving the service performance and reducing the production cost of high-end circuit boards. In this paper,pure copper strips with initial cube texture were subjected to a double rolling process(deformation amount ranges from 50% to 95%),and the surface textures evolution law and mechanism of doublerolled strips were studied by an X-ray diffraction technique. The results show that when a deformation amount increased from 50% to 70%,the grains of two surfaces rotate away from the cube orientation,and the formed textures of two surfaces mainly consisted of C,S and B orientation components. The orientation density values for these three components on bright surface only had slight difference; the orientation density values for C and S components were much larger than that for B components on a matt surface. When the deformation amount increased to 90%,the increase extents of orientation density values for C and S components were obviously larger than that for B components on a bright surface; the increase extents of orientation density values for these three components were almost the same on the matt surface. It has been found that when deformation amount reaches 95%,the grains orientation of bright surface were relatively concentrated,and the orientation density value for C texture obviously increased to 11.68 and that for B texture was only 3.15; the grains orientation of matt surface were relatively dispersed,and the orientation density value for C texture increased to 9.26 and that for B texture obviously increased to 6.35,and the density values of these two textures had less difference. For the condition of strong compressive and shear stress on the bright surface,grains were mainly rotating to C texture orientation; compared with the bright surface,"semi-free" deformation condition on the matt surface is beneficial to promote much more grains to rotate to the B texture orientation.     

推广的双向积分不等式及其应用

对一类开型的最佳两点积分法则:ba∫f(t)dt=b-a2[f(3a+b4)+f(a+3b4)]+R(f),通过构造函数p1(t),p3(t),导出了两点积分法则上下误差界的双向积分不等式,并得到了相应的最佳上下误差界;另外,考虑到两点积分法则的一个扰动,这个扰动后的法则优越于原始的积分法则;最后,给出了这些结果在数值积分中的应用。     

大学物理实验分层次教学模式的构建

培养学生的基本实验素质是大学物理实验教学的主要目标之一,本文对如何利用基础性物理实验所具有实验难度低、实验时效高的特点,通过设计合理的教学模式,达到培养学生的动手能力和激发学生的创新意识的教学目标进行了探讨。     

双J管在ESWL中的应用及护理

目的探讨双J管在ESWL中的临床效果及护理措施.方法将400例肾、输尿管结石(结石大小1.5～3.5cm)病人随机分为治疗组200例,在体外冲击碎石(ESWL)前经膀胱镜插入双J管;对照组200例不插入双J管,所有病人均行ESWL治疗.结果治疗组病人有12例(6%)发生石巷,对照组26例(13%)发生石巷两组治疗后比较则显著率及(P<0.05).结论在ESWL前放置双J管,配合护理人员密切观察病情,精心护理,可明显降低石巷的发生率,减少碎石并发症.     

Double设计的几个结果

讨论了Double设计在对称化L2-偏差下的均匀性,给出了Double设计为均匀设计的充要条件,同时得到了Double设计的对称化L2-偏差的下界,来评价Double设计的均匀性,最后通过一个例子来验证理论结果。     

实施床边双人核对制预防临床护理缺陷的实践

目的：探讨实施床边双人核对制对预防临床护理缺陷的效果.方法：建立床边双人核对制.调查实施床边双人核对制前后各半年时间内不同职称护理人员护理缺陷发生率，以及实施床边双人核对制前后住院病人护理缺陷发生率，分别评估不同职称护士发生护理缺陷的差异和实施床边双人核对制预防护理缺陷的效果.结果：护师及以下职称护理人员发生护理缺陷的比例高于主管护师及以上职称的护士，差异有统计学意义（P<0.05）；实施床边双人核对制后临床护理缺陷发生率降低，与实施前相比，差异有统计学意义（P<0.05）.结论：护师及以下职称护理人员易发生护理缺陷，是病人安全管理中的重点培训对象；实施床边双人核对制可以降低临床护理缺陷发生的风险，有助于病人安全管理，值得推广应用.