n阶仿射平面上d-disjunct矩阵的讨论

分组测试的NGT算法在许多领域有着广泛的应用,它的数学模型是d-disjunct矩阵.近年来,人们借助于复形理论、图理论、空间理论和容错估算等来研究它.介绍了分组测试和仿射平面的基本知识,在n阶仿射平面上构作了d-disjunct矩阵,证明了它的一些性质,与n阶射影平面上的d-disjunct矩阵作了比较.     

一类数列积的解法及推广

对一类数列积进行求解并推广,使结果适用于一般数列积的计算.     

一种基于改进DTW的人体运动模式感知算法

人体运动模式感知算法作为下肢外骨骼机器人的关键技术之一,是外骨骼能否平稳、高效地实现人机协同功能的基础。为提高感知精度,提出了一种改进的动态时间规整（DTW）算法和一种自适应权重分配机制。首先针对传统DTW算法存在匹配失真的问题,提出了一种新的路径约束条件,并适当松弛算法的端点,以处理端点部分数据可能无法对齐的问题;然后在多传感器决策层融合中设计了一种自适应权重分配机制;最后通过惯性测量单元（IMU）采集人体在六种常见运动模式下的运动数据进行实验。实验结果表明,所提出的改进DTW算法和自适应权重分配机制相结合有助于感知精度的提升,六种运动模式的平均感知精度由90.78%提升至97.64%。     

Effect of substrate temperature on the growth and properties of boron-doped microcrystalline silicon films

Highly conductive boron-doped hydrogenated microcrystalline silicon (\mu c-Si:H) films are prepared by very high frequency plasma enhanced chemical vapour deposition (VHF PECVD) at the substrate temperatures $T_{\rm S})$ ranging from 90$^\circ$C to 270$^\circ$C. The effects of $T_{\rm S}$ on the growth and properties of the films are investigated. Results indicate that the growth rate, the electrical (dark conductivity, carrier concentration and Hall mobility) and structural (crystallinity and grain size) properties are all strongly dependent on $T_{\rm S}$. As $T_{\rm S}$ increases, it is observed that 1) the growth rate initially increases and then arrives at a maximum value of 13.3 nm/min at $T_{\rm S}$=210$^\circ$C, 2) the crystalline volume fraction ($X_{\rm c})$ and the grain size increase initially, then reach their maximum values at $T_{\rm S}$=140$^\circ$C, and finally decrease, 3) the dark conductivity ($\sigma _{\rm d})$, carrier concentration and Hall mobility have a similar dependence on $T_{\rm S}$ and arrive at their maximum values at $T_{\rm S}$=190$^\circ$C. In addition, it is also observed that at a lower substrate temperature $T_{\rm S}$, a higher dopant concentration is required in order to obtain a maximum $\sigma _{\rm d}$.     

Research on the optimum hydrogenated silicon thin films for application in solar cells

Hydrogenated silicon (Si:H) thin films for application in solar cells were deposited by using very high frequency plasma enhanced chemical vapour deposition (VHF PECVD) at a substrate temperature of about 170℃. The electrical, structural, and optical properties of the films were investigated. The deposited films were then applied as i-layers for p-i-n single junction solar cells. The current--voltage (I-V) characteristics of the cells were measured before and after the light soaking. The results suggest that the films deposited near the transition region have an optimum properties for application in solar cells. The cell with an i-layer prepared near the transition region shows the best stable performance.     

石墨烯衍生物作为无金属碳基催化剂在有机催化中的应用

近年来,随着绿色化学和可持续发展等创新理念的提出,无金属催化剂逐渐成为催化领域的研究热点和前沿.石墨烯作为一种新型纳米碳材料,具有机械强度大、比表面积高、稳定性好、电学性质优异等特点,经过改性或功能化后的衍生物可以作为无金属碳基催化剂,在有机反应中展现了良好的应用前景.本文综述了石墨烯衍生物的结构和性质,探究了石墨烯基材料的结构与催化活性之间的关系,总结了此类材料作为无金属催化剂在氧化、还原/氢化、偶联、取代反应以及其他有机反应中的应用和反应机理.     

论WeakerГN—环的谐零根

本文旨在系统阐述ＷｅａｋｅｒГＮ－环的五个谐零根,它们分别是：强谐零根Ｎｓ,拟强谐零根ＮＱｓ,谐零根Ｎ, 谐零ＮＱ以及Ｂ－谐零根ＮＢ,最后还证明了五个谐零根之间的关系。     

三磷酸腺苷酶的化学模拟

综述了ATP酶的化学模拟的研究进展。     

静态法和X射线吸收精细结构光谱技术研究腐殖酸对Eu(III)在高庙子膨润土上的吸附影响

膨润土由于其高吸附性和低渗透性而受到广泛的研究. 在本文中, 利用XRD、FTIR和酸碱滴定对我国内蒙古高庙子膨润土进行了详细的表征和分析. 用静态法研究在温度为25± 2 ℃和0.01 mol/L NaClO4溶液中, pH值、腐殖酸、接触时间和Eu(III)初始浓度对Eu(III)在钠基膨润土上的吸附影响. 研究结果表明Eu(III)的吸附受pH值影响明显. 在低pH值条件下, 腐殖酸对Eu(III)的吸附影响微弱, 而在高pH值条件下腐殖酸降低Eu(III)的吸附. X射线吸收精细结构光谱(XAFS)技术对吸附在膨润土上的Eu(III)局域微观结构研究结果表明, 在pH为4.15条件下, Eu在膨润土上与其周围的氧原子间的距离大约为2.39 Å. 本文中的研究结果对于评估其他三价镧系和锕系元素在作为填充材料的膨润土上的吸附和迁移具有重要的意义.