对一道涉及密度的溶液配比问题的探讨

分析解答了一道涉及密度的溶液配比的问题,通过讨论得出此类问题的一般结论.     

周期性水波与淹没障碍物相互作用的数值研究

The interaction between regular water waves and a submerged obstacle in a channel is studied numerically. The fluid viscosity is taken into account and the volume of fluid method is used to deal with the free surface. The incident regular waves are generated by use of numerical absorbing wave maker paddle. The present method can be used to predict the nonlinear deformations of the transmitted regular waves, and to simulate the vortex flow near the obstacle and the shear flows beneath the free surface.     

Numerical Study of Interactions between Regular Water Waves and a Submerged Obstacle

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知识空间:知识组织的概念基础

文章从情报组织和知识组织的具体化出发 ,提出了“知识空间”这样一个知识组织的新的概念基础。探讨了可在多维空间中表示的知识领域的“概念向量”、基于对这些概念理解的个人“状态向量”、包括知识子空间的检索系统中可能存在情报项的“表示向量”、用户扩检或缩检子空间的“检索体积”,以及这一新概念意义。参考文献 1 1     

关于旋转体体积的研究

阐述了平面图形绕坐标轴旋转产生的旋转体体积与形心坐标之间的联系。在此基础上把它推广到绕任意直线旋转的情况。并得出求旋转体体积的一般，公式。     

白云金矿接替资源勘查成果的简评及意义

白云金矿接替资源勘查项目共布设22条勘查线,实施49个钻孔,控制网度160米×160米,金资源量估算严格按照《岩金矿地址勘查规范》要求执行,共计探获333级别金金属量15777千克。结合外围相邻金矿区,无疑已经构成了一个特大型金矿床。白云金矿接替资源勘查为保障辽宁基础工业冶炼加工原料供求,推动辽宁老工业基地振兴,做出了重大的历史性贡献。     

2003年全国高考中两道立体几何试题的评析

据改卷同志的介绍，今年高考中，理科的立几题得分率很低。为此。本文从解法分析着手．对此题作了深入地探讨，并提出了改进的意见。     

C语言中指针与数组结合的分析与讨论

首先阐述了地址、数组与指针的概念,随后通过分析推理的方法使指针与数组结合应用这一复杂难以掌握的问题得以轻松解决。     

Investigation of blood pulse PPG signal regulation on toe effect of body posture and lower limb height

Objective: To study the regulation of blood pulse volume via photoplethysmography (PPG) signal detected from toe, while the lower limb is passively raised in different height positions. Methods: Use a modified non-invasive PPG technique to detect the blood pulse signal on toe with infrared (IR) photo sensor. A protocol consisting of two postures, i.e., supine and 45° reclining, was designed to conduct laboratory trial in this study. During the period of performing the protocol of these postures, the lower limb was passively raised from the heights of 10 cm to 60 cm randomly and individually with sponge blocks underneath the foot. Results: In the supine posture, the higher the foot was passively raised, the more the blood PPG signal decreased. In the 45° reclining posture, the blood PPG signal increased at the beginning and then decreased in the foot height position from 10 cm to 60 cm. In both postures the normalized AC signal changes significantly while the normalized DC signal changes little. Conclusion: The toe PPG signals can obviously indicate the regulated blood volume change with the designated postural procedures due to the heart level position.     

Survivin在乳腺癌及大肠癌中表达的临床意义

目的：探讨大肠癌、乳腺癌中生存素的临床意义。方法：收集大肠癌68例,乳腺癌69例,利用SABC免疫组织化学方法,检测Survivin表达状况。结果：大肠癌和乳腺癌中Survivin阳性率分别为63.24%和42.03%,Survivin在大肠癌低分化组和深浸润组阳性率明显高于浅浸润和高分化组;在浸润型乳腺癌组和有淋巴结转移组Survivin阳性率明显增高。结论：Survivin表达与癌组织生物学特性有关;检测癌组织中Sur-vivin表达可以提示预后及指导靶向治疗方案的制定。