摘要：This research proposes a novel three-dimensional gravity inversion based on sparse recovery in compress sensing. Zero norm is selected as the objective function, which is then iteratively solved by the approximate zero norm solution. The inversion approach mainly employs forward modeling; a depth weight function is introduced into the objective function of the zero norms. Sparse inversion results are obtained by the corresponding optimal mathematical method. To achieve the practical geophysical and geological significance of the results, penalty function is applied to constrain the density values. Results obtained by proposed provide clear boundary depth and density contrast distribution information. The method's accuracy, validity, and reliability are verified by comparing its results with those of synthetic models. To further explain its reliability, a practical gravity data is obtained for a region in Texas, USA is applied. Inversion results for this region are compared with those of previous studies, including a research of logging data in the same area. The depth of salt dome obtained by the inversion method is 4.2 km, which is in good agreement with the 4.4 km value from the logging data. From this, the practicality of the inversion method is also validated.

摘要：With the continuous development of full tensor gradiometer （FTG） measurement techniques, three-dimensional （3D） inversion of FTG data is becoming increasingly used in oil and gas exploration. In the fast processing and interpretation of large-scale high-precision data, the use of the graphics processing unit process unit （GPU） and preconditioning methods are very important in the data inversion. In this paper, an improved preconditioned conjugate gradient algorithm is proposed by combining the symmetric successive over-relaxation （SSOR） technique and the incomplete Choleksy decomposition conjugate gradient algorithm （ICCG）. Since preparing the preconditioner requires extra time, a parallel implement based on GPU is proposed. The improved method is then applied in the inversion of noise- contaminated synthetic data to prove its adaptability in the inversion of 3D FTG data. Results show that the parallel SSOR-ICCG algorithm based on NVIDIA Tesla C2050 GPU achieves a speedup of approximately 25 times that of a serial program using a 2.0 GHz Central Processing Unit （CPU）. Real airbome gravity-gradiometry data from Vinton salt dome （south- west Louisiana, USA） are also considered. Good results are obtained, which verifies the efficiency and feasibility of the proposed parallel method in fast inversion of 3D FTG data.

摘要：In this paper,we propose an RLC equivalent circuit model theory which can accurately predict the spectral response and resonance characteristics of metamaterial absorption structures,extend its design,and characterize the parameters of the model in *** employing this model,we conducted computations to characterize the response wavelength and bandwidth of variously sized metamaterial absorbers.A comparative analysis with Finite Difference Time Domain(FDTD)simulations demonstrated a remarkable level of consistency in the *** designed absorbers were fabricated using micro-nano fabrication processes,and were experimentally tested to demonstrate absorption rates exceeding 90%at a wavelength of 9.28μ*** predicted results are then compared with test *** comparison reveals good consistency in two aspects of the resonance responses,thereby confirming the rationality and accuracy of this model.

摘要：Depletion calculation is important for studying the transmutation efficiency of minor actinides and longlife fission products in accelerator-driven subcritical reactor system(ADS). Herein the Python language is used to develop a burnup code system called IMPC-Burnup by coupling FLUKA, OpenMC, and ORIGEN2. The program is preliminarily verified by OECD-NEA pin cell and IAEAADS benchmarking by comparison with experimental values and calculated results from other studies. Moreover,the physics design scheme of the CIADS subcritical core is utilized to test the feasibility of IMPC-Burnup program in the burnup calculation of ADS system. Reference results are given by the COUPLE3.0 program. The results of IMPC-Burnup show good agreement with those of COUPLE3.0. In addition, since the upper limit of the neutron transport energy for OpenMC is 20 MeV, neutrons with energies greater than 20 MeV in the CIADS subcritical core cannot be transported; thus, an equivalent flux method has been proposed to consider neutrons above 20 MeV in the OpenMC transport calculation. The results are compared to those that do not include neutrons greater than 20 MeV. The conclusion is that the accuracy of the actinide nuclide mass in the burnup calculation is improved when the equivalent flux method is used. Therefore, the IMPC-Burnup code is suitable for burnup analysis of the ADS system.

摘要：为了提高峰谷分时电价政策的有效性,需要深入研究用户、尤其是大用户的电价响应机理,为此引入了多智能体模拟方法,在仿真过程中假设电价响应是众多用户分散决策的结果,且供电公司应能根据用户响应情况动态调整电价政策。文章阐述了仿真系统的设计原理与体系框架:用户智能体采用适应性智能体设计,基于模糊逻辑建立其响应规则;供电公司智能体采用学习型智能体设计,使用分类器学习算法进行规则学习;环境管理模块管理两类智能体的交互过程。最后以某实际电力公司为例进行了仿真计算。

摘要：阵元数太多导致前视阵列SAR系统天线成本高和设计复杂,如何以较少的阵元数获取较高的成像质量是前视阵列SAR系统面临的重难点问题.根据系统成像质量要求,结合波束扫描、栅瓣抑制等技术,本文提出一种稀疏收发天线阵的设计方法.理论分析和仿真实验结果表明,该方法在保证一定成像质量的前提下,有效降低了阵元数量,提高了系统信噪比,具有一定的应用价值.

摘要：结合国内现有的加工工艺水平,提出自偏置条件下的反向并联二极管对电路结构.不但解决了三倍频器偏置电路加工的难题,而且可以有效实现奇次倍频.同时,利用HFSS和ADS软件,以场路结合的方式准确模拟三倍频器的电特性,考虑到寄生参数引入的影响.设计完成以后,器件加工以及电装过程均在国内完成.测试结果表明在221 GHz处,有最大输出功率3.1 m W,在219~227 GHz频率范围内输出功率均大于2 m W.以上研究为今后设计高效率亚毫米波倍频器提供重要的参考价值.

摘要：　阐述了以苯三唑、甲醛、脂肪胺为原料的Mannich反应制备苯三唑脂肪胺衍生物的方法、性能评定及结果表征。合成反应是以水为溶剂在80～100℃下进行,具有反应条件温和、方法简便、产率高的特点。合成添加剂的分子结构经过了元素分析、红外光谱和核磁共振等分析鉴定。通过四球试验和铜片腐蚀等试验分别考察了其对润滑油的抗磨减磨性能、抗腐性能、油溶性能和热稳定性能的影响,经测试,制得的产品具有优良的油溶性、减磨性、热稳定性、防锈性和抗磨性。尤其是选择了牛脂胺代替十八胺作为原料,降低了生产成本,并且各项指标均达到了油性剂要求。合成的添加剂是一种多用途、性能优良的润滑油添加剂。

摘要：列车运行调整是调度指挥工作中关键任务之一.列车运行调整模型多是基于确定的、强度较弱的扰动提出的,然而现实中某些扰动可能包含不确定的信息,且强度较大,使得既有模型和算法呈现出一定局限性.针对单线铁路区间能力失效条件下列车运行调整问题,考虑能力失效持续时间的不确定因素,探索优化制定列车运行调整方案的模型.提出两阶段带补偿随机期望值模型,进一步讨论了多阶段递归决策概念模型的复杂度,据此给出了不完全连续多阶段决策模型.针对两类模型提出基于分枝定界的求解算法,设计算例进行验证,与基于优先级的运行调整方法进行比较.结果表明,相对于基于优先级的方法,多阶段决策模型能够将总列车晚点时分的期望值降低34%,两阶段模型能够降低4%,两种模型均能够在一定程度上提高列车正点水平.

摘要：2008年的冰灾对线路保护通道产生了严重影响,冰灾中线路保护均采用专用光纤通道对突发情况应变能力太差。通过对常规的几种继电保护通道方式的分析比较,对220kV线路保护通道配置原则进行了调整。以220kV方圆-岗阳线为例,根据新的配置原则对线路保护进行了通道配置,通过理论计算分析论证配置的合理性。对新的保护通道配置原则提出了一些看法。