摘要：With the continued expansion of oil and gas exploration,both in the eastern and western regions,the quality of seismic acquisition has become a key factor in oil and gas exploration in complex ***,conventional seismic acquisition methods cannot effi ciently avoid challenging acquisition locations and produce high-quality seismic *** this regard,based on the curvelet transform,this paper proposes an irregular seismic acquisition method,which utilizes the high-precision characteristics of the curvelet transform and simulated annealing algorithm to establish a method for the evaluation of the coherence of irregular sampling matrices and design of observation *** method was verifi ed using forward simulation and actual acquisition *** results suggest the superior quality of seismic data gathered in complicated areas through this method over those acquired using traditional methods,which can provide technical guidance for the design of observation systems in complex areas.

摘要：为了快速并且有效地求解最小比率旅行商问题,文章提出了一种混合行为蚁群算法。通过对蚁群算法中转移概率以及信息素更新策略加以改进,使蚂蚁能够随机性地选择自己的行为规范,将蚁群进一步智能化;为防止陷入局部最优,算法中设计了交换策略与灾变策略。仿真实验结果表明,改进后的算法能够有效求解最小比率旅行商问题。

摘要：在黄土塬、山地等低信噪比地区,单炮近道受面波、激发噪声等影响,地震资料品质极差.为此提出了非纵观测,使目的层反射波避开近道干扰,来提高地震资料的信噪比.如何选择合适的非纵距进行观测系统设计?常规方法是采用建立三维地质模型,利用射线追踪或波动方程正演模拟地震记录选择观测系统的非纵距,但由于地质现象的复杂性、建模软件的应用性、建模方法适用条件的局限性等等,使得在实际生产应用中,模拟出的地震记录还存在一些不足之处.为此融合探区以往的地震资料,建立了如下流程确定合理的非纵距:首先搜集探区以往的炮集数据,在炮集数据上拾取地震波(初至波、反射波和面波)和目的层倾角,获取地震波的走时、均方根振幅、主频、相位等信息,建立炮检距与分析地震波属性值(走时、均方根振幅、主频、相位等)的关系曲线;然后根据地质任务设计单炮点的非纵观测系统,根据炮检距选择对应地震波的关系曲线相应的属性值,模拟地震记录;最后根据目的层反射波能否有效避开面波、初至波、近道干扰,确定观测系统非纵离.通过实例验证,对于地质构造复杂、资料信噪比低的地区,模拟的地震记录更符合探区地质构造特点,能有效地指导观测系统非纵距的设计,达到合理压制噪声和提高地震资料信噪比的目的,克服了传统宽线压噪能力低和三维采集投资过大的矛盾.

摘要：An experimental muon source(EMuS) will be built at the China Spallation Neutron Source(CSNS). In phase I of CSNS, it has been decided that EMuS will provide a proton beam of 5 kW and 1.6 GeV to generate muon beams. A 128-channel muon spin rotation/relaxation/resonance(μSR) spectrometer is proposed as a prototype surface muon spectrometer in a sub-branch of EMuS. The prototype spectrometer includes a detection system, sample environment, and supporting mechanics. The current design has two rings located at the forward and backward directions of the muon spin with 64 detectors per ring. The simulation shows that the highest asymmetry of approximately 0.28 is achieved by utilizing two 10-mm-thick brass degraders. To obtain the optimal asymmetry, the two-ring structure is updated to a four-ring structure with 32 segments in each ring. An asymmetry of 0.42 is obtained through the simulation, which is higher than that of all the current μSR spectrometers in the world.

摘要：在六角形解析节块方法中引入不连续因子,对该方法进行改进研究,并研制了分析程序HANDF和HANDF-C。应用该程序对UO2和MOX燃料组件组成的基准题进行了计算,结果表明,改进后的方法能够有效地提高反应堆堆芯(特别是非均匀性较强的堆芯)功率分布和有效增殖因子的计算精度。

摘要：至今日本在建和已建的波形钢腹板组合梁桥已经达到200多座,中国达到30多座,桥型有简支梁、连续梁、连续刚构及斜拉桥等,截面形式由最初的单箱单室发展到单箱多室。从受力性能和节约成本上看,50~150m跨径范围是最具有竞争力的。目前设计中多采用空间杆系模型、平面梁格模型和实体模型相结合的计算分析方法,但是,空间杆系模型缺乏空间效应精细化分析,如剪力滞效应、有效分布宽度问题、偏载系数问题等;由于平面梁格法在等效原理上的近似性,不能准确反映箱形组合梁的剪应力分布和顶底板局部受力;实体模型很难和总体计算相结合。而空间网格模型可以实现精细化分析,并且具有分析完整性、验算应力全面性,弥补了目前分析方法的不足。通过实体模型与空间网格模型的实例验证,可知两种模型的应力和位移的计算结果几乎一致,说明了网格模型的适用性和精确性。

摘要：对南方沿海城市分流制排水管网的沉积物特征进行了分析。结果表明,研究区域的雨水和污水管道沉积物均未检测出苯并(a)芘、苯酚、氰化物、多氯联苯等常见有毒物质;公园绿地区的雨水管道沉积物中无机物、硫化物、全氮、石油烃(C_(10)~C_(40))、总磷含量都较其他区域要低;排水管道沉积物中的颗粒以0.05~2.0 mm的砂粒为主,而在公园绿地区粒径较小的粉粒和黏粒占比也较大,说明地表植被可以有效阻滞大颗粒物质进入排水系统;雨水管道沉积物中重金属含量排序为:工业区>居民区>公园绿地区;管道沉积物中的微生物以Christensenellaceae-R-7-Group、Acinetobacter(不动杆菌)和Desulfovibrio(硫化振动菌)为优势菌属。

摘要：龚艳（以下简称龚）：首先非常感谢倪老师接受《贵州大学学报》（艺术版）的采访，和我们一起对谈的学者还有浙江师大的余韬博士，浙江传媒学院周冬莹博士。我们今天的话题既旧亦新——第五代电影，我们特别希望倪震老师从历史的维度，结合当下带给我们一个审视第五代电影的新角度。

摘要：A new linac injector CSR-LINAC for the Cooler Storage Ring of the Heavy Ion Research Facility in Lanzhou(HIRFL-CSR) is proposed to improve the performance of the HIRFL. As a key component of the CSRLINAC, the 108.48-MHz radio frequency quadrupole(RFQ) is under design at the Institute of Modern *** ions with mass-to-charge ratios of 3–7 will be accelerated from 4 to 300 keV/u by the RFQ. In the beam dynamics design, the New Four-Section Procedure is adopted to improve the transmission efficiency and obtain a compact structure. In this paper, a transmission efficiency of 98.0% in the 3.07-m-long cavity was obtained. The Interdigital H-type structure is employed because of its mechanical stability and high shunt impedance. The RF performance of the cavity is investigated by the electromagnetic simulation. The optimized results of the electric field to meet the beam dynamics requirements are presented in this paper.

摘要：基于时域有限差分方法,通过仿真计算设计了一种具有较高品质因子和传输效率的二维光子晶体耦合腔波导结构。通过改变二维光子晶体波导微腔结构中隔绝波导与微腔的空气孔的半径和数量,在获得近似90%的传输效率的同时,使得品质因子达到了8.20×104。为了使品质因子在大幅度提高的同时,传输效率只有小幅度的降低,在波导微腔结构中引入了链式微腔。将链式微腔结构与传统的波导微腔结构相结合,使这种新形式的耦合腔结构的品质因子提高了1个数量级,传输效率仅下降了约40%。