基于实测横摇角的客滚船车辆安全装载方案研究

为验证航区风力达到7级时车辆不绑扎方案的可行性,开展了跟船实测最大横摇角等数据的工作,结合惯性力的计算方法,对装载车辆的安全性进行校核.结果表明:实际风力7级时,典型客滚船装载车辆不绑扎也不会滑移和倾覆;但当有涌浪等特殊海况时,横摇角超过10°时,不绑扎装载车辆不安全.根据校核结果,提出了简单实用、易于推广的车辆安全装载方法.     

含纳米粒子溶液对单晶硅表面的冲蚀磨损损伤实验研究

利用高分辨透射电子显微镜和原子力显微镜观察了含纳米颗粒溶液冲蚀硅片表面损伤行为,考察了纳米颗粒碰撞单晶硅片所导致的微观物理损伤.结果表明:冲蚀30 s后,在高分辨透射电子显微镜下可见硅片表面呈现方向性损伤,并可观察到大量非均匀的晶格缺陷;当冲蚀10 min时,硅片表面出现微观划痕和凹坑,在划痕一端可见原子堆积,亚表面可观察到镶嵌晶粒的非晶损伤层;继续延长冲蚀时间将加剧其表面损伤.     

Distributed wireless quantum communication networks with partially entangled pairs＊Distributed wireless quantum communication networks with partially entangled pairs＊Distributed wireless quantum communication networks with partially entangled pairs＊Distributed wireless quantum communication networks with partially entangled pairs

Wireless quantum communication networks transfer quantum state by teleportation. Existing research focuses on maximal entangled pairs. In this paper, we analyse the distributed wireless quantum communication networks with partially entangled pairs. A quantum routing scheme with multi-hop teleportation is proposed. With the proposed scheme, is not necessary for the quantum path to be consistent with the classical path. The quantum path and its associated classical path are established in a distributed way. Direct multi-hop teleportation is conducted on the selected path to transfer a quantum state from the source to the destination. Based on the feature of multi-hop teleportation using partially entangled pairs, if the node number of the quantum path is even, the destination node will add another teleportation at itself. We simulated the performance of distributed wireless quantum communication networks with a partially entangled state. The probability of transferring the quantum state successfully is statistically analyzed. Our work shows that multi-hop teleportation on distributed wireless quantum networks with partially entangled pairs is feasible,     

折叠波导行波管切断匹配的设计

 利用电磁模拟软件,计算得到了H面渐变与E面渐变的楔形衰减器匹配效果,指出在相同渐变长度下,E面渐变匹配效果优于H面渐变。H面渐变衰减器反射主要来源于电场集中处,而E面渐变衰减器主要来源于渐变前部尖端处。在此基础上设计出了一种变形的匹配衰减器,即在E面渐变衰减器渐变开始处向前延伸一块薄片。计算结果与测试结果表明:与H面渐变和E面渐变的楔形衰减器相比,所设计衰减器在近截止频率处的匹配效果得到了明显的改善。     

聚吡咯/STAB-NaMMT/GC电极对苯二酚的电化学行为研究

利用十八烷基三甲基溴化氨（STAB）和聚吡咯（PPy）钠基蒙脱土制备了PPy/STAB钠基蒙脱土/GC电极（PPy/STAB-NaMMT/GC）.用循环伏安法和方波溶出伏安法（SWSV）研究了对苯二酚在该电极上的电化学行为.实验表明,在pH 6.0 PBS电解液中,对苯二酚在该电极的电极反应受扩散控制,转移的电子数与质...     

Pd/Au纳米结构制备和粒子组分自旋的谱学性能研究

为研究Pd/Au纳米结构制备和电催化性能、控制粒子大小组分和自旋,用油浴热分解方法制备了核/壳纳米结构Pd/Au双金属合金纳米颗粒,采用PVP和多元醇作表面活性剂和稳定剂,依据溶液浓度、颗粒大小、吸附能控制晶相获得了均匀、一致的2层和3层Pd/Au纳米样品,并采用HAADF和HRTEM测试了纳米结构尺寸形貌,用EDS测试了成分分布,试验产物用TEM/XRD进行了表征,结果表明,Pd/Au具有面心立方八面体结构,与Au/Pd核壳不同,纳米Pd/Au具有活性、耐久性、电催化性和稳定性。     

L-Shell X-Ray Yields and Production Cross Sections of Zr and Mo Bombarded by Slow Highly Charged Ar16+ Ions

The L-shell x-ray yields of Zr and Mo bombarded by slow Ar16＋ ions are measured. The energy of the Ar^16＋ ions ranges from about 150 keV to 350 keV. The L-shell x-ray production cross sections of Zr and Mo are extracted from these yields data. The explanation of these experimental results is in the framework of the adiabatic direct- ionization and the binding energy modified BEA approximation. We consider, in the slow asymmetric collisions such as Ar and Mo/Zr, the transient united atoms （UA） are formed during the ion-surface interaction and the direct-ionization is the main mechanism for the inner-shell vacancy production. Generally, the theoretical results are in good agreement with the experimental data.     

Design of a reentrant double staggered ladder circuit for V-band coupled-cavity traveling-wave tube

The reentrant double staggered ladder slow-wave structure is employed in a high-power V-band coupled-cavity traveling-wave tube. This structure has a wide bandwidth, a moderate interaction impedance, and excellent thermal dissipation properties, besides the easy fabrication. A well-matched waveguide coupler is proposed for the structure. Combining the design of attenuators, a full-scale three-dimensional circuit model for the V-band coupled-cavity traveling-wave tube is constructed. The electromagnetic characteristics and the beam--wave interaction of this structure are investigated. The beam current is set to be 100 mA, and the cathode voltage is tuned from 16.8 kV to 15.8 kV. The calculation results show that this tube can produce a saturated average output power over 100 W with an instantaneous bandwidth greater than 1.25 GHz in the frequency ranging from 58 GHz to 62 GHz. The corresponding gain and electronic efficiency can reach over 32 dB and 6.5%, respectively.     

斜坡应力分布的系统测试与反演分析

采用简易、快速、经济的洞壁应力恢复法对某工程边坡勘探平硐洞壁应力场作了系统测试, 并采用FLAC^2D软件对测试成果作了斜坡初始应力的反演分析。结果表明, 斜坡应力场随深度变化具有明显分带性, 应力量值随硐深曲线具有典型的驼峰式特征, 与理论分析结果相符, 表明该方法能较好地应用于斜坡应力场的系统测试和研究。成果对认识斜坡岩体的变形破裂及卸荷特征等具有重要意义。     

基于半解析法的钢绞线丝间摩擦学性能研究

为探究钢绞线丝间摩擦学性能，考虑钢绞线丝间摩擦接触和往复滑动行为等因素，基于曲杆理论、Archard磨损理论等，建立了周期弯曲钢绞线丝间摩擦学性能求解模型，采用半解析法实现快速求解，并通过与曲杆理论、有限元仿真结果对比以及磨损试验验证模型有效性，进而研究钢绞线丝间磨损深度、摩擦接触滑移等摩擦学性能参数的分布规律，分析载荷幅值、几何结构以及材料属性等对其丝间摩擦学性能的影响.结果表明：钢绞线丝间磨损发生在弯曲中性层外侧，钢丝未接触或接触但未发生滑移之处不发生磨损；弯曲载荷越大，磨损越严重；侧丝半径、捻角越大，丝间接触压力与接触变形均增大，故而磨损加剧；总磨损深度随钢绞线材料的弹性模量和泊松比增大而增大.