决策域流感知接纳控制

针对单信息流感知接纳控制存在的判决误差,提出使用优先队列队长和链路公平速率指标构建4个二维状态空间以描述不同的链路状态信息。根据不同链路状态下的流分布特征,将4个状态空间映射为3个联合决策域,并由此得到多业务流的联合判决表作为提出接纳控制算法的判决条件。针对不同业务流各自的敏感性能指标,推导了实时流的阻塞率和弹性流的平均吞吐量表达式,仿真统计显示提出算法在过载情况下,实时流阻塞率平均增加约5.44%时,其时延减少约为总时延的10%,弹性流吞吐量平均增加为链路带宽的25.75％。     

有载调压变压器对电压稳定影响的仿真分析

采用时域仿真法分析了有载调压变压器 (OLTC)对电压稳定的动态影响 .表明在考虑了动静态负荷的情况下 ,当系统无功功率不足且系统扰动较小时 ,确实存在由于OLTC的连续调节而引起的慢动态电压失稳 .同时 ,探讨了采用闭锁OLTC分节头以防止电压崩溃的措施的有效性 .还结合电压稳定域的概念 ,研究了大扰动情况下OLTC对电压稳定的影响     

工业炉煤粉旋风预燃器的气相流场特性

介绍ＨＤ－２型工业炉煤旋风预燃器的试验装置,测定其切向速度Ｖφ,径向速度Ｖｒ,轴向速度Ｖｘ和静压Ｐｓ的分布。     

Hankel算子的有界性

得到了Cn中有限型凸域Ω的汉克尔（Hankel）算子Lp 有界的一个充分条件。     

旋风分离器气相流场的数值模拟

为了考察适合旋风分离器流场模拟的湍流模型,采用三维贴体网格,应用ＰＨＯＥＮＩＣＳ程序对某旋风分离器气相流场进行了数值模拟,湍流模型分别采用标准ｋ－ε模型和Ｃｈｅｎ－Ｋｉｍ模型。通过计算结果与实验数据的对比发现,与标准ｋ－ε模型相比较,Ｃｈｅｎ－Ｋｉｍ模型更适合于模拟涡旋流动,可以用来进行旋风分离器流场模拟。     

有序Ni纳米线阵列的样模制备法及其磁单畴特性

研究以多孔氧化铝为样模通过电沉积制备金属Ｎｉ的有序一维纳米线阵列,对其形貌和结构进行了表征,并测量了有序Ｎｉ纳米线阵列的磁滞回线。结果表明：以多孔氧化铝为样模所制得的Ｎｉ纳米线尺寸均匀、排列有序且直径和长度可在一定范围内任意调节;直径为１０ｎｍ,长达８μｍ的Ｎｉ纳米线阵列在磁性质上表现出显著的磁单畴特性。     

Formation of domain structure of erythrocyte membrane in Wistar rat fed with CeCl3 per os

To explore the possibility of absorption of lanthanides via digestive duct and their effects on the membrane structure and permeability of erythrocytes, the fine structure of erythrocyte membrane from Wistar rats, fed for 70 days of daily administrationper os with 20 mg CeCl₃/kg weight, was imaged by means of atomic force microscopy and FT-IR deconvolution spectra. The results show that, although the erythrocytes maintain the intact shape, the change of secondary structure, aggregation and crosslinking of the protein particles of membrane surface and the enlarged lipid regions lead to the domain structure formation. This structure might be responsible for the increasing permeability of erythrocyte membrane.     

Activities and properties of calcineurin catalytic domain

Calcineurin (CN) is the only protein phosphatase known to be under the control of calcium (Ca²⁺) and calmodulin (CaM). The enzyme consists of two subunits, the catalytic A subunit of 61 ku (CNA) and a regulatory B subunit of 19 ku (CNB). In this study, we used PCR amplication to construct a truncation consisting of only the CNA catalytic domain. The truncation was induced by IPTG and expressed inE. coli. PNPP was used as a substrate to study the phosphatase activity of the CNA catalytic domain. The findings show that its activity is 20 times greater than CNA in the presence of CNB and CaM. The optimum reaction temperature for the CNA catalytic domain protein is 40°C, and the optimum reaction pH value is 8.0. Mn²⁺ is still an effective activator for the CNA catalytic domain, but its activity is not controlled by Ca²⁺. In the presence of 6 mmol/L Mg²⁺, adding either Ca²⁺ or EGTA did not change the activity of the CNA catalytic domain.     

IP多播路由选择及应用

分析在因特网上使用的各种IP多播路由算法及优缺点。基于具体多播模型,重点介绍因特网IP多播路由标准。最后对实验性多播主干网提出改进意见。     

关于不定方程x2[KG-*2]+7=y3

对于某些d，若Q(d)是Euclid域，则对应的Euclid整环中算术基本定理成立，利用此来证明不定方程x2+7=y3没有整数解.