利用邻域“结构洞”寻找社会网络中最具影响力节点 Leveraging neighborhood “structural holes” to identifying key spreaders in social networks
一类非线性发展方程的复合型双孤子新解 New complexion two-soliton solutions of a class of nonlinear evolution equation
具有质量及频率涨落的欠阻尼线性谐振子的随机共振 Stochastic resonance of an underdamped linear harmonic oscillator with fluctuating mass and fluctuating frequency
一种改进的高性能Lorenz系统构造及其应用 An improved high performance Lorenz system and its application
α稳定噪声驱动的非对称双稳随机共振现象 Stochastic resonance of asymmetric bistable system with α stable noise
光学频率梳基于光谱干涉实现绝对距离测量 Spectral interferometry based absolute distance measurement using frequency comb
不同入射脉冲强度线性啁啾对BaF2晶体交叉偏振波输出特性影响的数值模拟研究 Investigation on the influences of linear chirp with different input pulse intensities on BaF2 cross-polarized wave generation
基于混合交叉差分进化的相机空间操控系统参数优化 A blending crossover differential evolution approach to camera space manipulation parameter optimization
一种新型的用于差分吸收激光雷达中脉冲式光学参量振荡器的种子激光器的频率稳定方法 A novel frequency stabilization method for the seed laser of the pulse optical parametric oscillator in differential absorption lidar
铯47D精细能级超冷里德堡原子自由演化的动力学研究 Hot! Spontaneous evolution of Cs 47D Rydberg atoms at different fine levels
用连续窄线宽激光器将超冷铯里德堡原子分别激发到47D3/2, 47D5/2精细态, 观察了处于里德堡精细态的铯原子向超冷铯等离子体自由演化的过程, 详细对比了不同精细态的铯里德堡原子预电离时间、电离速率以及等离子体的转化效率. 将里德堡原子快速转化为等离子体的过程解释为局域势阱内由预电离产生的电子与里德堡原子的快速碰撞导致的雪崩电离.
粗糙表面涂覆目标的太赫兹波散射特性研究 Terahertz scattering property for the coated object of rough surface
基于双十字架型宽带低耗小单元左手材料的设计与实验验证 Double cross-shape broadband low-loss and small units left-handed metamaterials based design and experimental verification
介质涂覆位置对双S弯排气系统电磁散射特性影响研究 Electromagnetic scattering characteristics of double S-shape exhaust nozzle with different coating medium parts
室内可见光通信系统中菲涅尔透镜接收天线的设计研究 Design and study of Fresnel lens for an antenna in indoor visible light communication system
太赫兹电磁波低通滤波器与中药材指纹数据提取 Fingerprint data extraction from Chinese herbal medicines with terahertz spectrum based on second-order harmonic oscillator model
飞秒激光在锥形镀膜探针传输中相位奇异的研究 Phase singularities in femtosecond laser pulses transmitting through optical fiber probes
离轴椭圆矢量光场传输中的光斑演变 Propagation evolution of the off-axis ellipse vector beam
基于Demons算法改进的图像去噪模型研究 Image denoising model based on the improved Demons algorithm
一种基于全息术的光学系统闭环像差补偿方法 A closed-loop aberration compensating method of optics system based on holography
量子相空间分布函数与压缩相干态表示间的变换关系 Transform relations between squeezed coherent state representation and quantum phase space distribution functions
互注入垂直腔表面发射激光器的多次偏振转换特性研究 Multiple polarization switching in mutually coupled vertical-cavity surface emitting lasers
基于外光注入互耦合垂直腔面发射激光器的混沌随机特性研究 Chaotic randomness of mutually coupled vertical-cavity surface-emitting laser by optical injection
增益导引-折射率反导引大模场光纤激光器抽运技术研究进展 Progress in gain-guided and index-antiguided large mode area fiber laser pump technology
周期力调制噪声驱动下单模激光系统的多重随机共振 Stochastic multi-resonance of the single-mode laser system driven by the noise with periodic force modulation
气雾化辅助激光诱导击穿光谱检测水中的痕量金属元素 Detection of metal element in water using laser-induced breakdown spectroscopy assisted by nebulizer
KDP晶体相位匹配角理论预测模型及其验证分析 Hot! Theoretical model of phase-matching angles for KDP crystals and its verification analysis
在高功率固体激光器的终端光学组件内, 大口径薄型KDP (KH2PO4)晶体的精密装配和校准是实现惯性约束核聚变的关键技术之一. 为了达到晶体在线安装高效高精度的要求, 需要测量高功率激光三次谐波转换效率达到最高时的晶体相位匹配角分布. 本文针对Ⅰ/Ⅱ类大口径薄型KDP晶体三次谐波转换的方式, 根据晶体的非线性光学属性获得了晶体不同位置相位匹配角之间的关系; 根据激光束在晶体内的传输路径分析得到了晶体面形、相位匹配角与激光三次谐波转换效率达到最高时 晶体最佳偏转角之间的相互关系. 在此基础上, 建立了Ⅰ/Ⅱ类KDP晶体相位匹配角的理论预测模型, 并利用实验进行了验证和分析. 实验结果表明, 晶体相位匹配角的预测值与实验值之差在10.0 μrad以内, 验证了Ⅰ/Ⅱ类KDP晶体相位匹配角理论预测模型的正确性, 为获得晶体全口径相位匹配角分布提供了简单、高效的预测方法.
强时间非局域系统中自相位调制诱导的“脉冲镜像”啁啾 “Inverted-image” frequency chirp induced by self-phase modulation in highly noninstantaneous medium
温度、湿度及压强对激光在水中衰减特性的影响 Influences of temperature, humidity and pressure on the attenuation characteristics of laser beam in water
大气环境下基于目标照明回光的视轴误差校正实验研究 Experimental research of boresight error correction using returning signals from the illuminated targets through atmosphere
温室气体及碳同位素比值红外光谱反演精度的影响因素研究 Influence factors of quantitative analysis precision of greenhouse gases and carbon isotope ratio based on infrared spectroscopy
基于菌紫质F态的永久光存储研究 F-state based permanent optical data storage in bacteriorhodopsin film
覆盖X和Ku波段的低雷达散射截面人工磁导体反射屏 A low radar cross-section artificial magnetic conductor reflection screen covering X and Ku band
质子辐照导致科学级电荷耦合器件电离效应和位移效应分析 Analysis of ionizing and department damage mechanism in proton-irradiation-induced scientific charge-coupled device
超声增强藻酸钙凝胶支架材料孔隙率的研究 Hot! Ultrasonic enhancement of the porosity of alginate scaffold
藻酸钙凝胶具有三维立体多孔结构, 能为细胞生长提供充分的附着空间, 且具有良好的生物相容性和一定的机械强度, 是一种理想的细胞支架材料. 本文研究了藻酸钙三维支架材料的力学特性与氯化钙/藻酸钠的配比的关系, 并提出采用低强度脉冲超声处理藻酸钙凝胶、基于超声空化效应增强藻酸钙凝胶孔隙率的新方法. 实验采用交联合成方法制备藻酸钙凝胶支架材料, 测量力学特性、孔洞的联通性与孔隙率, 并利用绿色荧光蛋白的表达评价细胞的增殖能力. 结果表明, 当氯化钙/藻酸钠的配比为3:5时, 凝胶的机械强度和弹性较好, 力学性能稳定, 为最佳配比参数. 采用声压0.055 MPa的脉冲超声作用20 min, 可以有效提高凝胶支架的孔隙率; 且细胞在该支架中生长状态良好, 呈现团簇状生长趋势.
声速剖面对不同深度声源定位的影响 Influences of sound speed profile on the source localization of different depths
一种基于单水听器宽带信号自相关函数的水下目标定位稳健方法 A robust localization method for source localization based on the auto-correlation function of wide-band signal
强多途环境下水听器阵列位置近场有源校正方法 A geometric calibration mehtod of hydrophone array with known sources in near field under strong multipath
基于Warping变换的波导时频分析 Analysis of waveguide time-frequency based on Warping transform
海洋波导的存在使得信号在水中传播过程中产生频散, 从而降低了信号处理质量. 基于声场的波导不变特性, 给出了一种具有普遍意义的Warping变换, 这种变换可以将波导中的信号频散特性简单化. 数值仿真结果表明, 只需要知道波导不变量的取值范围就可以很好地提取出波导的频散曲线, 数值仿真和海上实验数据给出了较为理想的结果.
考虑动态车间距的一维元胞自动机交通流模型 One-dimensional cellular automaton model of traffic flow considering dynamic headway
基于蚯蚓背孔射流的仿生射流表面减阻性能研究 Characteristics on drag reduction of bionic jet surface based on earthworm's back orifice jet
一类新型激波捕捉格式的耗散性与稳定性分析 On the accuracy and robustness of a new flux splitting method
方腔内Cu/Al2O3水混合纳米流体自然对流的格子Boltzmann模拟 Numerical simulation of natural convection of square enclosure filled with Cu/Al2O3-water mixed nanofluid based on lattice Boltzmann method
甲烷/氧气层流反扩散火焰形态及滞后特性研究 Mode and hysteresis of laminar methane/oxygen inverse diffusion flame
离子镀制备Cr/W混合过渡层的氢氘辐照效应研究 Irradiation effect of deuterium or hydrogen on Cr/W mixed transitional layers prepared by double ion beam deposition
三维集成电路堆叠硅通孔动态功耗优化 Stack-through silicon via dynamic power consumption optimization in three-dimensional integrated circuit
C, N, O原子在金属V中扩散行为的第一性原理计算 First-principles calculations of the diffusion behaviors of C, N and O atoms in V metal
Tb0.3Dy0.7Fe2合金的本构参数辨识方法研究 Method of identifying consitutive parameter in Tb0.3Dy0.7Fe2 Alloy
高质量高取向(100)面金刚石膜的可控性生长 Preparation of the high-quality highly (100) oriented diamond films with controllable growth
BCC枝晶生长原子堆垛过程的晶体相场研究 Investigation of atom-attaching process of three-dimensional body-center-cubic dendritic growth by phase-field crystal model
硅基全光宽带太赫兹幅度调制器的研究 Optically tuned wideband terahertz wave amplitude modulator based on gold-doped silicon
无线携能通信系统中基于能量获取比例公平的波束成形设计 Beamforming design based on energy harvesting proportional fairness in a simultaneous wireless information and power transfer system
针对无线携能通信系统中存在能量获取不均衡的问题, 提出了一种基于能量获取比例公平的波束成形设计方案. 该方案在满足信息接收者的信干噪比以及发送端的最大发送功率等约束条件的基础上, 通过优化波束矢量实现能量获取的比例公平. 此设计在数学上是一个很难直接求解的非凸优化问题.为此, 本文首先利用半定松弛技术将其转换为半定规划问题, 然后结合二分法提出了可以获得最优波束矢量的迭代算法.此外, 在发送端仅知道部分信道状态信息且知道信道误差范围的情况下, 采用最差性能最优的方法对原优化问题进行了鲁棒波束成形设计, 并提出了相应的迭代算法. 仿真结果表明所提算法均可实现能量获取的比例公平且性能达到全局最优.
晶圆键合和激光剥离工艺对GaN基垂直结构发光二极管芯片残余应力的影响 Effect of wafer bonding and laser liftoff process on residual stress of GaN-based vertical light emitting diode chips
高精度实时主动轴向防漂移系统研究 A real-time axial activeanti-drift device with high-precision
度关联无标度网络上的有倾向随机行走 Biased random walks in the scale-free networks with the disassortative degree correlation
长时间大气温度序列的外部变化趋势判别研究 Detection of significant external trend in long-term air temperature records