ID 原文 译文
25635 并用数值仿真对结论进行了验证。 A numerical simulation demonstrate the correctness of the conclusion．
25636 针对强散射体微波成像困难问题，本文提出了一种对比源框架下的基于拉普拉斯先验的多任务贝叶斯压缩感知方法，实现了稀疏强散射体的微波成像。 Aiming at the difficulty of microwave imaging of strong scatterers, a multi-task Bayesian compressed sensing method based on Laplacian priori is proposed, which realizes microwave imaging of sparse strong scatterers．
25637 在对比源框架下，基于“数据”积分方程并对成像区域网格离散建立稀疏感知模型，前向问题采用矩量法数值模拟; In the framework of contrast sources, sparse sensing model is established based on the "data" integral equation and the mesh discretization in the imaging region． The forward problem is simulated by the moment method ;
25638 构造基于拉普拉斯先验的贝叶斯压缩感知分层模型; a Bayesian compressed sensing hierarchical model based on Laplacian priori is constructed;
25639 在多入射波情况下，利用多任务贝叶斯压缩感知方法对对比源进行优化求解; and in the case of multi-incident waves, multi-task Bayesian compressed sensing method is used to optimize the contrast source．
25640 最后利用“状态方程”实现了目标函数的重构。 Finally, the objective function is reconstructed by using the "state equation"．
25641 本文在考虑噪声情况下，通过对多像素单目标、不均匀目标、多目标的微波成像数值模拟，并与共轭梯度方法、一阶 Born 近似框架下的多任务贝叶斯压缩感知方法的重构结果比较，验证了本文方法的有效性和鲁棒性。 Considering the influence of noise, through the numerical simulation of multi-pixel single target, non-uniform single target and multi-target microwave imaging, and compared with the reconstructed results of conjugate gradient method and multi-task Bayesian compressed sensing method in the first-order Born approximation framework, which verifies the effectiveness and robustness of the proposed algorithm．
25642 为了提高大功率磁控管的输出功率，延长其使用寿命，采用难熔稀土氧化钆和过渡金属氧化铪制备大功率磁控管用新型直热式稀土铪酸钆陶瓷阴极，并对该阴极的热发射特性和寿命特性等进行了测试，热发射测试结果显示该阴极在 1300℃ br 即可提供 0. 1A/cm2发射电流密度，1600℃ br 下可提供超过 1. 93A/cm2的发射电流密度。 In order to enhance the output power, prolong the lifetime of the high power magnetron，a method of refractory rare-earth oxide Gd2O3 doped transition metal oxide HfO2 was used to prepare direct-heated rare-earth Gd2Hf2O7 ce-ramic cathode. The thermionic emission and life characteristics of the Gd2Hf2O7 cathode had been measured. The results show that the cathode can provide 0. 1A /cm2 current density for the space charge limitation at 1300℃ br, more than 1. 93A /cm2 at 1600℃ br under 300V anode voltage．
25643 寿命实验结果显示，该阴极在 1500℃ br，直流负载为 0. 5A/cm2的条件下，寿命已经超过 4000h。 The lifetime for the cathode is more than 4000 h with an initial load of 0. 5A /cm2 at 1500℃ br．
25644 最后，利用 X 射线衍射仪、扫描电镜、能谱分析仪、氩离子深度刻蚀俄歇电镜等设备分别对该阴极活性物质的分子结构，阴极表面微观形貌、元素成分及含量等进行了分析。 Finally, the molecular structure, surface microstructure, element composition and content of the Gd2Hf2O7 ceramic cathode had been analyzed by the XＲD, SEM, EDS, AES (equipped with argon ion etching in-depth analysis) respectively．