Design and Implementation of the Android Mobile Phone Bus Query System

伴随4G网络的普及，移动互联网的市场意义才变得广泛且实际。各行各业都开始寻求在移动端的进一步发展，开始把传统的业务、桌面上的平台、公司日常的事务以及日常办公等等放到移动端来进行操作。 Android是由谷歌公司联合世界手机组织共同研发的一个开放性移动平台。Android拥有Linux内核模块，Dalvik虚拟机且有一个独特单一的综合图，并且包含一个轻量级的SQLite数据库且具有2D，3D快速绘制轮廓和多媒体等技术，具有一个功能强大的网络接入，如集成3G、Wi-Fi、蓝牙和其他无线网络技术的功能模块和开发商之间具有无缝的继承与交换模块的重用性，有效的开发周期短，开发难度较低，结合移动定位技术...With the popularization of 4G network, the mobile Internet is beginning to have a broad and practical significance of the market. All walks of life are beginning to seek the development of mobile terminal; the traditional business, the desktop platform, company daily affairs and office and so on to the mobile terminal to operate. Android mobile platform is a platform for the development of open b...学位：工程硕士院系专业：软件学院_工程硕士(软件工程)学号：X201323087

关于多复变数的积分变换公式及其应用

利用整体分析方法,给出了一个多复变数的整体积分变换公式,获得了Cn中一闭逐块光滑可定向流形上的bOCHnEr-MArTInEllI型积分高阶偏导具有HAdAMArd主值的PlEMElJ公式和相应奇异积分的合成公式,拓广的POInCAré-bErTrAnd公式.作为应用,我们还讨论了一类高阶CAuCHy边值问题和一类多复变数线性高阶奇异微积分方程的正则化问题.国家自然科学基金(批准号:10771174);福建省自然科学基金(批准号:S0850026)资助项

管棚保护下框架桥顶进工程高程控制分析

大直径管棚保护下直接顶进预制箱涵技术是近年来国内发展起来的一种全新的施工技术,但其难度大,理论发展不完善,可借鉴的经验少.依托南昌市新龙岗大道下穿向莆铁路工程,根据实际工程情况建立力学分析模型,计算框架桥下钢管的受力,并根据钢管的受力情况假定钢管为Winkler弹性地基梁,运用弹性地基梁理论建立钢管挠曲微分方程并求解该微分方程,从而计算出框架桥顶进过程中的钢管挠曲变形,进而确定顶进过程中框架桥高程偏差情况.理论分析表明,底排管棚的支撑和引导作用有助于框架桥推进,并能有效遏制框架桥\"栽头\"和\"抬头\"现象,对于现场工程施工具有很好的参考价值.福建省自然科学基金(2014J01208

Influence of Particle Damper Configurations on the Dynamic Characteristic for Gear Transmission System

齿轮传动正朝着高速、重载和高精度方向发展,对其动态性能要求越来越高。颗粒阻尼通过颗粒间、颗粒与阻尼器壁间的非弹性碰撞和摩擦作用耗能,具有减振效果; 显著、耐高温、各向同性、对原结构改动小等优点。利用有限元法对齿轮进行了有预应力的模态分析,通过齿轮系统动力学分析,研究单双齿啮合激励对齿轮传动的; 影响;同时建立齿轮传动离心场中颗粒系统耗能模型,将离散元法计算颗粒系统耗能和试验测试对比,分析阻尼器配置对齿轮传动系统动特性的影响。结果显示,阻; 尼器配置方案是影响齿轮传动系统动特性的一个重要因素,在阻尼孔中填充一定数量的颗粒,当阻尼器总体积相同且齿轮结构静刚度相差不大时,阻尼器个数越多颗; 粒系统能耗越大;当阻尼孔直径相同时,阻尼孔个数越多颗粒系统总能耗越小;当阻尼孔个数相同时,阻尼孔直径越大颗粒系统能耗越小。通过试验和仿真对比验证; 了模型的正确性,为颗粒阻尼在离心场中的应用提供重要的理论依据。The gear transmission is advancing towards high speed, heavy load and; high precision. The requirements for the dynamic performance of gear; system are urgently proposed. The particle damping dissipates mechanical; system energy through inelastic collisions and friction between; particles. It is an effective and simple measure for vibration; reduction. It has many advantages, such as isotropy, high temperature; resistance and less modification to the original structure. This paper; has conducted the prestressed modal analysis of gear system by the; finite element method. Based on the dynamics analysis of gear system,; the effect of single tooth and double teeth meshing incentive on gear; transmission has been analyzed. The energy dissipation model of particle; damping for gear transmission in centrifugal field has been established.; By contrasting theoretical analysis and the test, the effect of damper; configuration on dynamic characteristic of gear transmission system is; analyzed. The results show that damper configuration is an important; factor of the dynamic characteristic for gear transmission system.; Filling a certain number of particles, when the gears static stiffness; are similar and the total dampers volume are equal, the more damping; hole, the greater the total energy loss. When the damping holes diameter; are the same, the more number of damping hole, the smaller the total; energy loss. When the damping hole number is the same, the bigger the; diameter, the less the total energy loss. Experimental results are; consistency with the theoretical analysis. These results can provide; guidelines for the application of particle damping in centrifugal field.国家自然科学基金; 福建省重点科技专项; 中央高校基本科研业务费专项资金; 福建省高端装备制造协同创新中心资助项

铁蛋白反应器储存有毒金属离子的初步研究

探讨铁蛋白反应器在模拟流动海水体系中储存有毒金属离子的能力及规律.在体外,脱铁核铁蛋白能重新构建新的铁核且核中多数铁组分经含有5% 氯化钠的海水处理后仍可稳定于蛋白壳中,只有少量对H+ 或OH- 较敏感的铁组分随反应体系的pH值增加或减少而被直接释放于介质中.此外,铁蛋白还能储存Co2+ 、Ni2+ 、Mn2+ 和Zn2+ 等有毒金属离子,并释放相对应的铁量,其储存离子量和释放Fe3+ 量的摩尔比为1:1,该储存量及能力与环境介质的pH值有关,与Na+ 、K+ 、Ca2+ 等非过渡金属离子无关.经改造后的铁蛋白反应器预计可用于监测流动水域的有毒金属离子

Microwave Digestion of Organophosphorous in Water Samples

采用微波消解系统对水样中有机磷进行消解，考察了消解时间、功率等不同实验条件对样品微波消解的影响；并将该法与总磷测定的常规消解方法进行了比较，结果表明，微波消解法简便、快速、准确、可靠Microwave digestion system was applied to digest water samples containing organophosphorous.The experimental conditions such as digestion time and power have been studied.The proposed method is also been compared with the conventional digestion method used in total phosphorus determination.The results show that the proposed method is simple,fast,accurate and reliable

过渡金属团簇Cr_n结构的理论研究

应用量子化学从头算方法研究了纯过渡金属Cr团簇中的各种组态及金属键,在HF/Lanl2DZ水平进行了研究,并用MP2做了电子相关能校正.通过对其几何结构和电子结构的研究预测:Cr3团簇有直线、V形、正三角形构型;Cr4有平面构型也有立体构型,平面构型原子间存在强弱键现象,即原子间存在定域键;Cr5、Cr6则有平面构型也有立体构型,平面构型有定域键也有离域键,立体构型则都是离域键

EXPERIMENTAL STUDY ON FRACTAL DIMENSION CHARACTERISTICS of ACOUSTIC EMISSION of ROCK UNDER MULTILEVEL UNIAXIAL CYCLIC LOADING

通过对三种岩石试样进行单轴循环加载试验,获得岩石试样加载过程中声发射事件率、能量率和空间位置分布数据。运用相空间重构理论直接从时间序列上通过g-P算法求得事件率和能量率关联分维,根据柱覆盖法求解得到声发射事件源空间分布关联分维。研究结果表明,声发射事件率、能量率和空间分布都具有分形特性,且声发射源空间分布分形特性最为显著。相空间的选取对关联维数有一定影响,相空间取值为4时能够较好地计算关联维数。将不同加卸载循环声发射源空间分布的变化趋势和声发射源空间分布关联维数变化趋势进行对比发现,声发射关联维数能够很好地反映岩石内部损伤破坏的发展。在等压加卸载条件下,声发射源空间分布关联维数显著突增。随着加卸载循环应力的增加,关联维数总体呈下降趋势,在达到较高应力时,关联维数则在较小区间内波动或下降趋势变得极其缓慢。该特点可以作为矿山地压微震监测预警的参考依据。Experiments on acoustic emission(AE) characteristics of fractal were carried out under uniaxial multilevel cyclic loading.AE rate, energy rate and spatial distribution of different rock specimens were obtained.Relevant fractal dimensions of AE rate and energy rate were figured out through G-P algorithm based on the theory of reconstruction of phase space.Relevant fractal dimensions of AE spatial distribution was figured out through column-covering method.The results show that AE rate, energy rate and AE spatial distribution are of fractal characteristics,and among them, AE spatial distribution has the most obvious fractal characteristics.Phase space has some effects on relevant fractal dimensions, and it is better to choose 4 as the basic dimension for correlation dimension calculation.The comparison of development trend of AE spatial distribution and relevant fractal dimensions under different cycles shows that fractal characteristics can reflect the statistical evolution of the micro-cracks in rock.Relevant fractal dimension increases under isobaric cyclic loading and decreases with the increasing of stress.Relevant fractal dimensions fluctuate in a small range or decrease slowly when the higher stress has been reached.The characteristics above can be used as the reference for micro-seismic monitoring warning on ground pressure in mining.国家“十二五”科技支撑计划项目(2013BAB02B06); 国家科技部科研院所技术开发研究专项资金项目(2013EG215024

Effects of Fluoride on Activities of Ru-based Ammonia Synthesis Catalysts

[中文文摘]以MgO为载体 ,分别用KF ,KNO3 ,BaF2 和BaO为促进剂前驱体制备钌基氨合成催化剂 ,并用X射线衍射 (XRD)、高分辨透射电子显微镜 (HRTEM)和催化剂性能评价等方法考察了不同促进剂前驱体对钌基氨合成催化剂的影响 .结果表明 ,电负性比氯大的氟的引入能提高催化剂的活性 ,在KF Ru/MgO催化剂中 ,F与载体的O发生交换 ,改变了载体的结构和表面性质 ,从而导致金属载体相互作用情况的不同以及金属分散度的提高 ,因而有利于催化活性的提高 .同时 ,当F以BaF2的形态存在时也能提高催化活性。[英文文摘]A series of Ru based ammonia synthesis catalysts supported by magnesia with different promoter precursors were prepared. The effects of different promoter precursors on the catalysts were investigated by XRD, HRTEM and performance evaluation techniques. The results indicated that the activities of catalysts were increased by the introduction of fluoride and some oxygen of magnesia was exchanged with fluoride in KF-Ru/MgO catalyst. It was suggested that the exchange of oxygen and fluoride changed the structure and surface property of support , hence improving the metal dispersion and the different interactions of ruthenium and the support . Consequently , the activity of catalyst prepared with KF was higher. At the same time , the activity of catalyst prepared by BaF2 was also higher than the one prepared by BaO, though the configuration of fluoride and barium was BaF2.国家自然科学基金(Nos.20273053,20023001,299330 40); 国家重点基础研究发展规划(No.001CB108906)资助项目

The Multi-criteria Evaluation of Rockburst Proneness on Deep Buried Large Tunnel

研究目的:高铁北武夷山隧道是一座单洞双线隧道,隧道最大埋深达1 100 M,属于高应力区,开挖过程中可能会出现岩爆现象。通过对隧道高应力地区采集的岩样进行室内岩爆倾向性实验,并结合声发射监测技术,得到岩石单轴抗压强度等性能参数,先采用强度脆性系数法、变形脆性系数法、弹性应变能指标法、切向应力准则四种单指标评价方法进行岩爆倾向性评价,然后运用四指标模糊数学综合评价法进行评价。研究结论:(1)结合声发射监测技术进行岩石力学实验,获得的变形脆性系数、弹性应变能指标系数相比常规实验更加精确;(2)根据岩体性质和围岩的应力情况,在传统综合评价方法基础上增加了变形脆性系数法评判指标,结果表明采用模糊数学综合评价方法得到的评价结果与单指标评价相比,更加符合隧道岩爆的实际情况;(3)本研究成果为隧道岩爆预测提供了可行方法,对于类似工程提前防治岩爆有借鉴意义。Research purposes: North Wuyi Mountain of high-speed railway is a single hole bidirectional tunnel,and the maximum depth of the tunnel is as deep as 1100 meters,so it belongs to high stress area that may cause rockburst in the process of excavation.The indoor experiments about rockburst proneness of rock samples which were collected in high stress area of the tunnel are recorded in this paper,and some property parameters of rock like the uniaxial compressive strength were got combining acoustic emission testing.Four kinds of single index evaluation method were used to evaluate rockburst proneness firstly,including the intensity of brittleness coefficient method,the deformation brittleness coefficient method, the elastic strain energy method and the tangential stress criterion.Then the comprehensive evaluation method of fuzzy mathematical was used to evaluate.Research conclusions:( 1) Combined with acoustic emission monitoring technology,we can get two indexes more accurately than conventional experiment.( 2) According to rock properties and surrounding rock stress,we increase the evaluation indicator of deformation brittleness coefficient method.It showed that the results from the comprehensive evaluation method of fuzzy mathematical are more in line with the actual situation of the rock burst of tunnel compared with the single index evaluation.( 3) The research result provides a feasible method to predict rockburst and it is significant to prevent and control of rockburst in advance for similar engineering