基于IDL和Python混合编程的深度学习遥感影像分类

Python是遥感图像深度学习分类算法常用的语言,但处理效率不佳且对影像类型兼容性不足。IDL是面向对象的交互式程序语言,支持多种遥感数据的高效读写与处理,但不支持深度学习算法的直接调用。本文设计了一套混合编程方案,采用HybridSN算法对乌苏地区的Sentinel-2影像进行深度学习分类。使用完全矢量化图进行混淆矩阵分析验证精度,并考虑到HybridSN算法的窗口参数对分类的影响,将立方体影像窗口分别设置为5,9,15进行训练和分类。结果表明:当窗口为5时精度最高,其中Kappa系数为0.7210,总体精度为85.66%。IDL与Python混合编程提高了遥感影像分类的工作效率,且便于后续的影像分析。结合实验结果可以进一步证实IDL与Python混合编程在遥感分类甚至其他Python代码中都有优势,其针对的基于Python的遥感处理技术,通过整合IDL的强大数据读写和预处理功能,实现各类代码的配置,从而提高数据处理效率。

Numerical study of plasmas start-up by electron cyclotron waves in NCST spherical tokamak and CN-H1 stellarator

According to the physics of tokamak start-up,this study constructs a zero-dimensional(0D)model applicable to electron cyclotron(EC)wave assisted start-up in NCST spherical torus(spherical tokamak)and CN-H1 stellarators.Using the constructed 0D model,the results obtained in this study under the same conditions are compared and validated against reference results for pure hydrogen plasma start-up in tokamak.The results are in good agreement,especially regarding electron temperature,ion temperature and plasma current.In the presence of finite Ohmic electric field in the spherical tokamak,a study on the EC wave assisted start-up of the NCST plasma at frequency of 28 GHz is conducted.The impact of the vertical magnetic field B_(v)on EC wave assisted start-up,the relationship between EC wave injection power P_(inj),Ohmic electric field E,and initial hydrogen atom density n_(H0)are explored separately.It is found that under conditions of Ohmic electric field lower than ITER(~0.3 V m^(-1)),EC wave can expand the operational space to achieve better plasma parameters.Simulating the process of28 GHz EC wave start-up in the CN-H1 stellarator plasma,the plasma current in the zerodimensional model is replaced with the current in the poloidal coil of the stellarator.Plasma startup can be successfully achieved at injection powers in the hundreds of kilowatts range,resulting in electron densities on the order of 10^(17)-10^(18)m^(-3).

Solution of idle LBO problem for high FAR aero combustor

The paper sheds light on the idle lean blow off(LBO)problem for high fuel air ratio(FAR)com⁃bustor,which is impossible to be addressed with traditional aero combustor design.A significant improvement in aero combustor design is required to resolve the idle LBO issue.The authors detailed a practical and efficient solu⁃tion,which not only solved the idle LBO issue but also defined the aero-thermal design for high-FAR combustor.The design will usher in a new era of aero combustor.

基于ArcGIS Engine和IDL的冬小麦生长动态监测系统

目的:为快速便捷地掌握大范围冬小麦播种、长势及产量信息,及时为农业管理部门的分析决策提供基础数据。方法:基于C#语言集成ArcGIS Engine组件和IDL函数库,设计冬小麦识别、长势监测及产量估算等功能模块,研发冬小麦生长动态监测系统。结果:该系统可较为快速地建立冬小麦空间数据库,便捷地提取冬小麦播种、生长和收获等各个生育期冬小麦农情信息,同时具有功能强大的时空分析和预测决策辅助功能。结论:实现了包括冬小麦在内的农作物的动态生长监测,可以为管理者提供数据及强有力的决策支持。

基于IDL通用接口的智能家居语音交互控制系统设计

设计基于IDL通用接口的智能家居语音交互控制系统,语音控制智能家居,可有效提升其智能性。将树莓派、标准接口描述语言IDL作为主控制器与输出指令,设计智能家居语音交互控制系统架构。利用麦克风采集用户语音信号,并由数据预处理模块使用改进小波阈值法去噪获取数据,去噪完成后,由树莓派通信百度语义平台,将其转化成文本信息,并通过IDL通用接口与IDL标准化指令数据库建立有效连接,在语音合成文本IDL命令控制语言转化模块使用自然语言-IDL标准化匹配技术,实现文本信息向IDL命令控制语言转化,并由无线网络将所获IDL控制指令发送给设备控制信号处理器,控制智能家居设备。实验结果表明:该系统可实现智能家居语音交互控制,标准化指令匹配效果较好,可收获较为理想的智能家居语音交互控制效果。

线粒体lncRNA IDL影响非小细胞肺癌氧化磷酸化

为了探究线粒体长链非编码RNA(mitochondrial long non-coding RNA,mtlncRNA)IDL在人非小细胞肺癌细胞(human non-small cell lung cancer, NSCLC)代谢和生长中的作用及机制,本研究首先在A549细胞中通过线粒体压力测试发现敲低IDL会导致细胞的氧化磷酸化功能受损,接着通过细胞增殖实验、划痕实验和克隆形成实验,证明了敲低IDL时人非小细胞肺癌细胞A549和H1299的生长速度变慢、迁移能力和克隆形成能力减弱.随后通过RNA沉降实验(RNA pull-down)和RNA免疫沉淀实验(RIP)找到了在体内外均可以与IDL特异性结合的蛋白——ATP合成酶α亚基,即ATP5A1蛋白,并通过免疫共沉淀实验(Co-IP)证明了IDL下调会导致ATP5A1蛋白的O-GlcNAc修饰水平增加,在A549细胞中敲低ATP5A1也得到了与敲低IDL时一致的细胞表型.以上结果说明敲低IDL会导致非小细胞肺癌细胞氧化磷酸化功能受损、细胞生长受抑制.

The Modeled Effects of Rice Field Idling on Groundwater Storage in California’s Sacramento Valley

Rice farmers occupy a potentially important intersection between economics and hydrology in Northern California. While drought makes water an increasingly precious commodity across California, the monetary worth of water is not uniform across different localities and uses. As a result, circumstances have given many Sacramento Valley rice farmers the option to sell their water to users elsewhere, in lieu of using it themselves. Because the sold water is typically surface water that would normally help recharge local aquifers when applied to a field;it is reasonable to suspect that transferring that water elsewhere could adversely affect local aquifers since that recharge would be reduced. This study performs numerical experiments using the United States Geological Survey’s Central Valley Hydrologic Model (CVHM) to better understand the temporal effects of a set of land idling scenarios. CVHM is capable of modeling the entire Central Valley, which encompasses the Sacramento and San Joaquin Valleys, and of representing rice field idling on a large scale. These experiments were executed using historical data to contrast recently typical amounts of rice field idling with scenarios reflecting varying degrees of hypothetical, increased idling. In doing so, this study aims to characterize the nature and potential magnitude of idling rice fields on groundwater storage in the Sacramento Valley. The impact of these scenarios on groundwater storage was quantified relative to an unaltered baseline model scenario. The results of this research show rice field idling will reduce recharge and groundwater storage levels;these results may provide useful information for future policy decisions and provide a basis for future study.

Numerical Simulation of a Two-Phase Flow with Low Permeability anda Start-Up Pressure Gradient

A new numerical model for low-permeability reservoirs is developed.The model incorporates the nonlinear characteristics of oil-water two-phase flows while taking into account the initiation pressure gradient.Related numerical solutions are obtained using a finite difference method.The correctness of the method is demonstrated using a two-dimensional inhomogeneous low permeability example.Then,the differences in the cumulative oil and water production are investigated for different starting water saturations.It is shown that when the initial water saturation grows,the water content of the block continues to rise and the cumulative oil production gradually decreases.

THE INTEGRAL AS A FUNCTlON OF THE UPPER LIMIT AND DEPENDING ON A PARAMETER TO SOLVE DRAWING THROUGH IDLING ROLLS

The relocity and sirain-rate .field which are different from Avilzur's have beenestablished in Caitesian coordinates. Using the integral as a function of the upper limitand integration depending on a parameler, an analylical upper-bound solution todrawing stress through idling rolls has been obtained in this paper.

Study of Integral Variable Structure Control Method for Stability of SI Engine Idling Speed

The intake air control system of a gasoline engine is a typical nonlinear system, and included among the adverse fac-tors that always induce poor idle-speed control stability are dead time and disturbances in the intake air control process. In this paper, to improve the responsiveness when idling with regard to disturbances, a mean-value engine model (MVEM) with dead time was constructed as the control object, and the two servo structures of sliding mode control (SMC) were studied for better idle control performance, especially in transient process of speed change. The simulation results confirmed that under the constraint condition of control input, the robustness of idle speed control that is being subjected to torque disturbances and noise disturbances can be greatly improved by use of the servo structure II.

Dynamic evaluation of a scaled-down heat pipe-cooled system during start-up/shut-down processes using a hardware-in-the-loop test approach

Micro-mobile heat pipe-cooled nuclear power plants are promising candidates for distributed energy resource power genera-tors and can be flexibly deployed in remote places to meet increasing electric power demands.However,previous steady-state simulations and experiments have deviated significantly from actual micronuclear system operations.Hence,a transient analysis is required for performance optimization and safety assessment.In this study,a hardware-in-the-loop(HIL)approach was used to investigate the dynamic behavior of scaled-down heat pipe-cooled systems.The real-time features of the HIL architecture were interpreted and validated,and an optimal time step of 500 ms was selected for the thermal transient.The power transient was modeled using point kinetic equations,and a scaled-down thermal prototype was set up to avoid mod-eling unpredictable heat transfer behaviors and feeding temperature samples into the main program running on a desktop PC.A series of dynamic test results showed significant power and temperature oscillations during the transient process,owing to the inconsistency of the rapid nuclear reaction rate and large thermal inertia.The proposed HIL approach is stable and effective for further studying of the dynamic characteristics and control optimization of solid-state small nuclear-powered systems at an early prototyping stage.

基于IDL的塘沽盐场地面气象观测报表审核软件开发

基于IDL语言,依据地面气象观测规范及人工审核经验制定人工审核规则,开发具有报表解析、数据审核功能的塘沽盐场地面气象观测报表审核软件。该软件通过数据格式、气候学界限值、内部一致性、时间一致性、空间一致性和质量控制码等方法对塘沽盐场报表格式参数、气象要素、气候概况等内容进行了检查,并形成了审核结论,实现了塘沽盐场地面气象观测报表审核的规范管理,为开展行业内其他观测数据自动化审核奠定了基础。

IDL编程分块读取影像

在开发“环南极冰山遥感影像提取算法”时,发现遥感影像需要分块进行图像增强,而ENVI+IDL软件仅能通过读取整幅影像获取影像的行列号。当遥感影像像幅过大时,往往会出现读取失败或耗时较长的问题,并且目前可查阅的相关文献及资料中都没有找到解决方案。介绍了基于交互式数据语言IDL影像的行列号快速获取方式,并解决了影像分块读取问题,给出相关程序代码。

基于ENVI-IDL程序设计和GIS的惠州市生态稳定性评价

选取热度、绿度、干度、湿度等作为评价指标,运用惠州市遥感数据、气象资料等实现评价指标的空间量化和表达,以ENVI-IDL和GIS为技术支撑,对惠州市生态稳定性进行评价,为惠州市生态环境的进一步改善提供参考。结果表明:从2010年到2019年,惠州市的MRSEI值(改进的遥感生态指数值)由0.365上升到0.375,说明期间惠州市的生态环境得到了一定改善,惠州市的生态环境总体较为稳定且趋于向好;惠州市的MRSEI值与人口密度的变化较为同步,而与人均GDP和降水量的变化较为不同步。

可倾瓦推力轴承惰转过程的最小膜厚预测方法

为建立可倾瓦推力轴承惰转过程中最小油膜厚度的预测方法,依据核主泵推力轴承的实际工作情况,基于雷诺方程的自编程序,分别进行热态和冷态下主、副轴瓦润滑性能参数的计算与数值模拟分析,提出可倾瓦推力轴承的最小油膜厚度的理论拟合公式,并对最小膜厚的计算值和拟合值进行对比和分析。结果表明:随着转速降低,主轴瓦的最小膜厚单调减小,副轴瓦的最小膜厚先增加后减小;主、副轴瓦最小膜厚的计算值可以和拟合值较好地对应,验证了理论拟合公式的可靠性。提出的理论拟合公式可以通过额定转速下的最小膜厚计算结果预测多种工作条件下的最小油膜厚度,为主泵惰转的安全性提供重要参考。

基于空闲时隙探测机制的分组帧时隙标签防碰撞算法

多标签碰撞是射频识别系统中无法避免的问题,大量的标签碰撞会增加系统的能量消耗和时间开销,严重影响系统的识别效率。为此提出一种新型的标签防碰撞算法,该算法结合了传统帧时隙算法简单易实施的优点,同时引入了分组和空闲时隙探测机制,以极小的探测时隙开销,消除了识别过程中的空闲时隙,同时减低了标签冲突概率。仿真结果显示,相对于FuzzyQ算法和帧时隙ALOHA算法,本算法平均吞吐率提高了22.64%和61.74%,系统通信传输量平均节省了16.73%和30.41%。

医院闲置或低效使用存量物资内部盘活管理模式初探

本文系统阐述康复大学青岛医院(青岛市市立医院)闲置或低效使用存量物资现状,深入分析其成因,通过采取健全内部控制管理制度、深耕物资供应精细化、智能化管理模式、加强物资成本合理管控,内部调剂盘活医院闲置或低效使用存量物资(办公用品、清洁用品、被褥衣服等)等措施,提升了资产使用效益和物资管理精益化服务水平,提高现有存量资产利用率,降低库存管理成本,节省采购支出,为医院创造更多的效益。

闲置宅基地盘活利用中的农村集体经济组织

农村集体经济组织盘活利用闲置宅基地的主体地位,应当着重厘清其与农村集体经济组织成员、宅基地使用权人的关系。农村集体经济组织盘活利用闲置宅基地,既可以为宅基地使用权人与其他社会主体签订合同提供居间服务,也可以依法经营闲置宅基地。农村集体经济组织直接经营闲置宅基地,或者通过出租、入股等方式将闲置宅基地交由他人经营的,应当由理事会起草盘活利用方案,成员大会或者成员代表大会作出盘活利用决议,并由理事会负责执行。农村集体经济组织盘活利用闲置宅基地获得的管理费用、居间服务费用和财产经营收益,应当根据不同的规则予以分配。

闲置土地认定处置法律规则的优化研究

研究目的:优化闲置土地认定处置法律规则,以此推动闲置土地认定处置难的规范解决。研究方法:案例分析法和规范分析法。研究结果:(1)优化闲置土地认定处置法律规则是土地节约集约利用、闲置土地法制统一和闲置土地治理实践的共同要求。(2)认定规则粗疏和处置规则失当是闲置土地认定处置法律规则的关键缺失。(3)闲置土地认定处置法律规则的优化路径,一是要通过厘清认定标准的关键概念、明确认定标准的土地单位和完善认定标准的分类结构,弥补认定规则的粗疏;二是要通过设计协商处置的兜底规则和推动行政处置的过罚相当,匡正处置规则的失当。研究结论:优化闲置土地认定处置法律规则需以促进土地节约集约利用为目标,以科学性、公正性、融贯性和可及性为导向,并结合地方立法经验完善闲置土地的认定标准和处置方式。

惠农义务教育政策执行中的“空转”现象与矫治——城镇化进程视野下的分析

作为推进城乡教育公平的关键,惠农义务教育政策已经实施多年,但城镇化的快速发展引致流动随迁子女和留守儿童现象并存。原有的惠农义务教育政策陷入了执行中的“空转”困境,具体表现在:一些施惠措施的目标精准性和时代适应性不足、城市学校义务教育资源难以均衡惠及流动人口、留守儿童义务教育质弱量缺的困局尚未扭转。基于政策执行过程分析框架,从政策执行的视角发现:公共服务消极供给、顶层设计不足、流入地财政压力过大、农民工参与空间与能力有限是造成惠农义务教育政策“空转”现象的主要原因。基于城镇化进程提出四个矫治路径,即:推进更高质量的城镇化、让农民有更多机会进入公共决策体系、建立完善的经费保障机制和消除社会歧视,以期提高惠农义务教育政策执行的有效性。