摘要：平带系统由于平带自身不存在结构,是研究由电子——电子关联导致的各种新奇物理效应的理想量子平台.因此,从理论上寻找各种新型的平带系统就十分的重要.实现一个平带的核心要素是找到系统中蕴含的紧局域激发.本文开发了一种系统的方法,从一个简单的一维链出发,通过一系列有约束的变形,得到存在一个在边缘处波函数完全相干相消激发的一个有限系统.利用该方法构造的有限系统经过简单平移和组合就可以产生各种新型二维平带系统.此时,这些被构造出来的有限系统中,边缘处波函数完全相干相消的激发就构成了这些新型二维平带系统中的紧局域态.此外,作者还证明了该方法可以扩展到准晶和多轨道平带系统的构造中,并将这种设计方法扩展到了三维平带系统的构造中.

摘要：This paper designs and develops a framework on a distributed computing platform for massive multi-source spatial data using a column-oriented database(HBase).This platform consists of four layers including ETL(extraction transformation loading) tier,data processing tier,data storage tier and data display tier,achieving long-term store,real-time analysis and inquiry for massive ***,a real dataset cluster is simulated,which are made up of 39 nodes including 2 master nodes and 37 data nodes,and performing function tests of data importing module and real-time query module,and performance tests of HDFS's I/O,the MapReduce cluster,batch-loading and real-time query of massive *** test results indicate that this platform achieves high performance in terms of response time and linear scalability.

摘要：A new type of pit supporting structure, which was tested and verified using the sensor monitoring technology, was presented. The new supporting structure is assembled by prefabricated steel structural units. The adjacent steel structural units are jointed with fasteners, and each steel structural unit has a certain radian and is welded by two steel tubes and one piece of steel disc. In order to test and verify the reliability of the new supporting structure, the field tests are designed. The main monitoring programs include the hoop stress of supporting structure, lateral earth pressure, and soil deformation. The monitoring data of the field tests show that the new supporting structure is convenient, reliable and safe.

摘要：Four optimal approaches of high-order finite-impulse response(FIR) digital filters were developed for designing four types filters using neural network algorithms. The solutions were presented as parallel algorithms to approximate the desired frequency response specification. Therefore, these methods avoid matrix inversion, and make a fast calculation of the filter’s coefficients possible. The convergence theorems of these proposed algorithms were presented and proved to illustrate them stable, and the implementation of these methods was described together with some design guidelines. The simulation results show that the ripples of the designed FIR filters are significantly little in the pass-band and stop-band, and the proposed algorithms are of fast convergence.

摘要：为山崩预防的一个最佳的排水隧道地点决心方法被建议在排水隧道建设解决存在问题。在中国的排水隧道系统的当前的应用程序被考察，排水隧道的函数作为集水和拦截被分类。数字模拟被进行。结果证明集水和拦截隧道在单层模型的模拟有功能的变化，它在更低的层显示出渗透状况的减小。集水的功能能在深斜坡被观察，当拦截的功能在地下水来源附近被观察时。由使用，斜坡安全因素和分泌物水为邻近的排水隧道的构造质量作为判断在固定节点和节流动作为最佳的排水隧道地点，和毛孔水压力的目的总计，排水隧道的设计原则被介绍。K103 山崩作为一个例子被说明决定最佳的排水隧道地点。测量排水隧道效率被评估并且与那相比从数字分析基于地下水数据。结果验证现在的数字学习。

摘要：All commercial electron spin polarimeters work in single channel mode, which is the bottleneck of researches by spin-resolved photoelectron spectroscopy. By adopting the time inversion antisymmetry of the magnetic field, we developed a multichannel spin polarimeter based on normal incident very low energy electron diffraction （VLEED）. The key point to achieve the multi-channel measurements is the spatial resolution of the electron optics. The test of the electron optics shows that the designed spatial resolution can be achieved and an image type spin polarimeter with 100 times 100, totally ten thousand channels is possible to be realized.

摘要：Allelopathic effects of submerged macrophytes against algae are affected by many environmental factors which can only be measured one by one by traditional methods. Box-Behnken design of response surface methodology was used to optimize three environmental factors(temperature, light intensity and total dissolved solids) of allelopathic effects of Potamogeton pectinatus against Microcystis aeruginosa at the same time. By solving the regression equation and analyzing the response surface contour plots, the optimal conditions of the relatively inhibitory rate of Microcystis aeruginosa were that the temperature was 23℃, the light intensity was 2,700,lx and the total dissolved solids were 4,415,mg/L. Under these conditions, the optimal value of relatively inhibitory rate of Microcystis aeruginosa was 81.9%. According to validation experiments, the results of analysis indicated that the experimental values fitted well with the predicted ones.

摘要：Recently the content centric networks(CCNs) have been advocated as a new solution to design future networks. In the CCNs, content and its interest are delivered over the content store and pending interest table, respectively, where both have limited capacities. Therefore, how to design the corresponding algorithms to efficiently deliver content and inertest over them becomes an important issue. In this paper, based on the analysis of content distribution, status of content store, and pending interest, we propose a novel caching algorithm with which the resources of content store and pending interest table can be efficiently used. Simulation results prove that the proposal can outperform the conventional methods.

摘要：To obtain a good drivability and high efficiency of the micro-electric vehicle, a new driving in-wheel motor design was analyzed and optimized. Maxwell software was used to build finite element simulation model of the driving in-wheel motor. The basic features and starting process were analyzed by field-circuit coupled finite element method. The internal complicated magnetic field distribution and dynamic performance simulation were obtained in different positions. No-load and load characteristics of the driving in-wheel motor was simulated, and the power consumption of materials was computed. The conformity of the final simulation results with the experimental data indicates that this method can be used to provide a theoretical basis to make further optimal design of this new driving in-wheel motor and its control system, so as to improve the starting torque and reduce torque ripple of the motor. This method can shorten the development cycle of in-wheel motors and save development costs, which has a wide range of engineering application value.

摘要：基于分形几何与复合左右手传输线的混合技术方法,提出了一种新型小型化微带双工器并对其进行了研究。该双工器将工作于一对不同频率的两个三端口网络进行合成,由构成其左手部分的集总元件和右手部分的Sier-pinski分形微带线组成。双工器的小型化得益于Sierpinski分形曲线的空间填充特性。而双工器的双频特性是由于复合左右手传输线具有双曲色散关系。为验证所提方法的有效性,成功设计了基于不同Sierpinski迭代次数的双工器。为证实仿真结果,加工测试了基于Sierpinski二次迭代分形的复合左右手双工器。仿真结果与测试结构吻合的很好。与未采用分形结构的传统复合左右手双工器相比,所制作的双工器工作于GSM两个频段(0.9和1.8 GHz)并获得了良好的通带性能和小型化比例,最大小型化比例达76.3%。