济宁市年水资源短缺程度的模糊综合评判

运用模糊综合评判方法及多因素评判指标,对济宁市2009年水资源短缺程度及短缺原因进行了比较全面的分析．为全面地描述济宁市水资源供需状况和短缺程度,采用了4类12个指标共同组成整个区域供需分析的指标体系,从不同角度反映济宁市水资源供需状况和短缺程度．评价结果为：济宁市目前的水资源状况总体上轻微短缺,短缺的主要原因是水资源分布不均,并且人口密集,万元GDP需水量耗水量过大引起的,有些区域存在水资源浪费的现象．     

济南城市发展预测研究

笔者通过对济南城市发展历史的研究,剖析城市发展的影响因素,如地形、交通等．选择SLEUTH模型,借助GIS、RS技术,对未来济南城市增长进行模拟,得到了济南未来2015年、2020年、2030年的城市中长期发展预测图,并通过与现实数据的比较验证了SLEUTH模型预测的精度．最后,针对济南未来发展存在的问题提出了浅见．     

Fabrication and characterization of all-Nb lumped-element Josephson parametric amplifiers

Josephson parametric amplifiers (JPAs) with nearly quantum-limited noise performance have become indispensable devices for the measurements of superconducting quantum information. We have developed an all-Nb lumped-element flux-driven JPA operating in the three-wave mixing mode. Our Nb-based JPA comprises Nb/Al-AlO_x/Nb Josephson junctions, a parallel-plate capacitor with SiO₂ dielectric sandwiched between two Nb layers, a bottom coplanar waveguides layer, and a top Nb wiring layer. We experimentally demonstrate a 20 dB gain over a 190 MHz bandwidth, a mean 1 dB compression of -123 dBm, and near quantum-limited noise performance. This fabrication process can be further used to design impedance transformed parametric amplifiers for multiple-qubit readout.     

山东省城镇化发展存在的问题的研究

2010年山东省城镇化水平达到49．7％，城镇化进程正从高速增长期过渡到平稳增长期，城镇化质量全面提升，但山东省城镇化的进程中仍然存在着城镇化滞后于经济发展、城镇化滞后于工业化、城镇化区域差异显著、经济发展中的第三产业滞后、小城镇综合实力差，以及长期以来粗放型城镇化所带来的发展矛盾突出等问题．笔者着重研究了这些存在的问题，并分析其产生的原因．     

Low-temperature phase transformation of CZTS thin films

The low temperature phase transformation in the Cu_2ZnSnS_4(CZTS) films was investigated by laser annealing and low temperature thermal annealing.The Raman measurements show that a-high-power laser annealing could cause a red shift of the Raman scattering peaks of the kesterite(KS) structure and promotes the formation of the partially disordered kesterite(PD-KS) structure in the CZTS films,and the low-temperature thermal annealing only shifts the Raman scattering peak of KS phase by several wavenumber to low frequency and the broads Raman peaks in the low frequency region.Moreover,the above two processes were reversible.The Raman analyses of the CZTS samples prepared under different process show that the PD-KS structure tends to be found at low temperatures and low sulfur vapor pressures.Our results reveal that the control of the phase structure in CZTS films is feasible by adjusting the preparation process of the films.