薄板圆筒轴向冲槽尺寸误差分析及补偿方法

分析了薄板圆筒轴向冲槽宽度尺寸产生误差的原因,提出了轴向冲槽弹性恢复量y 沿轴向呈抛物线变化的假设和冲槽宽度尺寸误差的补偿办法     

Micro/-nanoscaled topography-coupled-mechanical action into functional biointerface

The micro/-nanoscaled functional biointerfaces aroused much interest of their key unit element to present unique functions. So far it is still difficult to describe the whole picture of this process. More and more evidences are beginning to support the theory of ‘‘mirco/-nanotopography-coupled-mechanical(TCM) action' into functional biointerfaces.Herein, we aim to highlight TCM action on varied micro/-nanoscaled functional biointerfaces, namely to achieve better understanding of micro/-nanoscaled structures by introducing interfacial mechanical behaviors. In this article, recent progressions on ‘‘TCM on air/liquid/solid-phase biointerfaces in nature', ‘‘in vivo TCM behaviors at micro/-nanoscales' ',‘‘TCM in micro/-nanoscaled artificial surface with living Cells' ' and ‘‘topography, interfacial curvature, mechanics' 'are reviewed. Certain new concepts of ‘‘TCM action based on spatial curvature', ‘‘medically functional biointerfaces' ' and‘‘biomechanopharmacology' are also proposed.     

弥散型透气砖阻力系数的测试与分析

根据Forchheimer's定律,测量了通过弥散型透气砖的吹气量和压降,并引入多孔介质模型描述气体在弥散型透气砖内的流动.借助CFD软件模拟计算了气体在透气砖内的流动状况,确定了弥散型透气砖的阻力系数.采用物理测试与数值模拟相结合的方法,研究透气砖的显气孔率和平均孔径对阻力系数的影响.结果表明,弥散型透气砖的黏性阻力系数远大于惯性阻力系数,在显气孔率为23%～28%的范围内,随着透气砖的显气孔率和平均孔径的增大,其阻力系数显著降低.     

灰色关联度在粮食生产结构分析中的应用

根据农业系统工程理论,应用灰色系统理论对科右中旗粮食生产的结构进行分析研究,探讨旱地粮食生产的优化结构.这对于调整农业种植业的主要指标、促进旱地粮食生产的发展将起到积极的作用,并为有关决策部门的宏观调控提供必要的依据.     

The radiolytic behavior and mechanism of calixarene crown ether under γ-irradiation

Bis(2-propyloxy)calix[4]crown-6 (BPC6) is an effective separation agent for cesium removing from spent nuclear fuel. The study on radiolytic behavior of BPC6 itself under γ-irradiation was required for evaluating its feasibility of practical application. It was found that BPC6 exhibited excellent radiation stability at dose less than 100 kGy. However, the isopropyl groups in BPC6 under- went oxidation and dealkylation to form carbonyl groups and phenolic hydroxyl groups at dose above 300 kGy, respectively. When the dose was more than 1000 kGy, the ring opening of crown ether structure of BPC6 resulted in the formation of phenolic hydroxyl groups as well. The formation of radiolytic products containing phenolic hydroxyl groups during the irradiation of BPC was confirmed by using FeCl 3 as a probe. Combining with the radiolytic behavior of two model chemicals (1-isopropoxybenzene and benzo-18-crown-6 ether), the radiolytic behavior and mechanism of BPC6 under -irradiation was testified further.     

一类广义凸多目标变分问题的对偶模型

考虑一类约束多目标变化问题，首先对这类问题提出了一般性对偶模型，然后，在目标函数和约束函数的广义（F，ρ）－凸性假设下，证明了原问题和对偶问题关于有效解的一系列弱对偶定理和强对偶定理，本给出的模型与结果推广了这一领域里最近一些献中的相应模型与结果。     

纳米粒子在真丝防皱整理中反应浓度与时间的效应

以马来酸酐为防皱整理剂，以纳米氧化硅作催化剂，在配方中加入适量的渗透剂和乳化剂，在取不同的纳米氧化硅浓度和烘焙时间的条件下对真丝织物进行防皱整理。测定处理后织物的折皱回复角和断裂强度，对结果进行分析讨论，优选得出最佳防皱效果的最佳工艺条件。     

实验室检测方法确认技术研究

本文讨论研究了方法确认的目的、意义、原则、条件及方法确认的内容和技术。     

Differentiated cells are more efficient than adult stem cells for cloning by somatic cell nuclear transfer

Since the creation of Dolly via somatic cell nuclear transfer (SCNT), more than a dozen species of mammals have been cloned using this technology. One hypothesis for the limited success of cloning via SCNT (1%-5%) is that the clones are likely to be derived from adult stem cells. Support for this hypothesis comes from the findings that the reproductive cloning efficiency for embryonic stem cells is five to ten times higher than that for somatic cells as donors and that cloned pups cannot be produced directly from cloned embryos derived from differentiated B and T cells or neuronal cells. The question remains as to whether SCNT-derived animal clones can be derived from truly differentiated somatic cells. We tested this hypothesis with mouse hematopoietic cells at different differentiation stages: hematopoietic stem cells, progenitor cells and granulocytes. We found that cloning efficiency increases over the differentiation hierarchy, and terminally differentiated postmitotic granulocytes yield cloned pups with the greatest cloning efficiency.     

两跳多中继网络中改进的前向放大中继策略

单源单宿多中继多天线系统中,中继总功率受限的最大化系统传输速率问题为非凸优化问题.针对此问题分别提出TFSA (Target Function Simplified Algorithm)和CCSA（Constrain Conditions Simplified Algorithm）两种优化算法.TFSA通过缩放信道矩阵与其共轭转置矩阵乘积的特征值使此问题成为凸优化,并使用传统凸优化方法获得其最优数值解;CCSA通过缩小此优化问题的约束集并转换自变量使之成为凸优化,再利用拉格朗日算法获得其解析解,能够实现算法复杂度和系统性能的折衷.实验仿真表明,TFSA算法能逼近最优算法实现的系统性能; CCSA与已有算法比较获得了一定的速率增益,且实现复杂度低.