基于现有地表水源热泵系统在冬季水源温度过低容易导致主机蒸发器结冰的问题,提出了一种新型的冰源热泵系统,介绍了过冷水法制取冰浆的工作原理和动态制冰装置的结构,分析了冰浆含冰率对冰源热泵系统性能和运行安全的影响.通过理论分析获得过冷水温度与冰浆含冰率的函数关系,使用Fluent软件模拟水平直管中的冰浆流动特性.综合考虑两种临界流速判断依据,获得管道安全运输不同含冰率冰浆的临界流速以及压降变化,研究了管径对临界流速的影响.建立TRNSYS模型研究含冰率对冰源热泵系统供热季性能的影响.结果表明,在含冰率1％～10％的范围内,临界流速呈略微下降的趋势;当水源回水温度等于-2.5℃时,相应的含冰率为3.42％,系统供热季平均COP达到最高3.0.

相变特朗贝墙系统是一种把相变板与传统特朗贝墙耦合起来的被动式围护结构节能技术,该系统与传统特朗贝墙相比能更充分地利用太阳能及自然通风,改善建筑室内热环境,提高室内热舒适性,降低建筑运行能耗.研究基于TRNSYS软件建立了相变特朗贝房间的动态传热模型,分析了关键影响因素包括玻璃类型、外遮阳长度、蓄热墙厚度、风口面积、空气夹层厚度和相变温度对相变特朗贝墙性能的影响.采用单因素分析方法和Genopt优化软件分析了以上关键影响因素对室内热环境和全年建筑负荷的影响.通过与传统特朗贝墙的对比探讨了该结构在夏热冬冷地区的节能潜力.

The depth image obtained by Kinect usually exists cavities at the edge of the object and occlusions. For this problem, many scholars have put forward many solutions. The existing cavity filling algorithms can repair the holes effectively, but these algorithms have a long execution time and are difficult to apply in practical applications. In order to solve the problems above, a hole filling algorithm for Kinect depth image is proposed. Firstly, the color and depth images acquired by Kinect are aligned. Secondly, small cavities will be filled with a pixel filtering method. Thirdly, an improved fast joint bilateral filtering algorithm is designed to fill the missing data in the large cavities. The experimental results show that the method can well repair the hole in the original depth image, and it has high real-time performance.

从"课程思政"顶层设计,结合信息产业帮助学生树立"四个正确认识",强化系统能力培养、增强学生"四个服务"本领等方面对如何发挥课堂主渠道做好立德树人工作进行了探讨.

精度矩阵在高斯图模型中具有广泛的应用,许多正则化方法用于精度矩阵的估计问题,然而却很少有对其解轨迹的关注.本文主要利用条件数正则化协方差矩阵估计的方法来探索精度矩阵估计的解轨迹,数值模拟结果表明该轨迹算法可以便捷地描绘出精度矩阵估计的解轨迹.

Cloud computing network and next-generation network is now widely used,which brings more security threats. Based on the process and the network tuples communication to construct defense system,the key technologies of defense under IPv4/IPv6 dual stack network are researched. It presents the NRLS Sunday based on improvement of the longest norepeat substring and Sunday algorithm,to a-void excessive repetitive character comparison and improve the matching efficiency of a single pattern string. Compared with BM,Sunday algorithm,the experiment shows the improved algorithm optimizes its time complexity. Under high-speed network,packet data contents is carried on rapid detection and analysis. Based on intelligent traffic restrictions for process and network,the intrusion detection and defense is conducted for network. In this paper,parallel packet detection method is studied under the high speed. Application web collaboration, and the unified arrangements and issued policies is applied in a complex network environment,proposing and realizing the effective meth-od of defense in the complex network environment.

Stripe noise removal (destriping) is a fundamental problem in remote sensing image processing that holds significant practical importance for subsequent applications. These variational destriping methods have obtained impressive results and attracted widely studied research interests. However, most of them are dedicated to estimate the clear image from the striped one, paying much attention to the image itself, while ignoring the structural characteristic of stripe, which would easily cause damages to the image structure and leave residual stripes in image recovery. In this paper, we treat the image and stripe components equally and convert the image destriping task as an image decomposition problem naturally. We first give a detailed analysis about the structural characteristic of stripes and the prior knowledge about the remote sensing images. Then, incorporating them, we propose a low-rank-based single-image decomposition model (LRSID) to separate the original image from the stripe component perfectly. This low-rank constraint for the stripe perfectly matches the fact that only parts of data vectors are corrupted but the others are not. Moreover, we further utilize the spectral information of the remote sensing images, and we extend our 2-D image decomposition method to the 3-D case. Extensive experiments on both simulated and real data have been carried out to validate the effectiveness and efficiency of the proposed algorithms.

Discuss the theory and high‐accuracy algorithm of complex steady response analysis that consider the influ‐ence of non‐classical damping on the dynamic equation of motion .The system is based on the conjunction of Nastran ,Inter MKL and Hoops with the Visual Studio 2005 development environment .Then an example is used to compare the analytic re‐sult of the platform with the commercial software Optistruct to verify the effectiveness of the platform .

信息技术和网络技术的快速发展对社会各个层面均产生深远影响，继企业信息化建设高度发展后，教育信息化已经成为我国国家信息化建设的又一项主要任务。在教育信息化发展洪流中，网络信息资源开发、网络基础设施建设、网络人才培养、网络技术应用、教育信息化政策规范等方面均取得了长足发展，近年来云技术等新技术、新理论的出现，给教育信息化插上了腾飞的翅膀，在教育信息信息化资源建设过程中，基于云计算的教育信息化资源共享对于提高教育资源利用率，促进教育发展过，提升教育质量均发挥出了日益重要的作用。

A grazing incidence flat-field spectrograph using a concave grating was constructed to measure extreme ultraviolet (EUV) emission from a CO2 laser-produced tin plasma throughout the wavelength region of 5 nm to 20 nm for lithography. Spectral efficiency of the EUV emission around 13.5 nm from plate, cavity, and thin foil tin targets was studied. By translating the focusing lens along the laser axis, the dependence of EUV spectra on the amount of defocus was investigated. The results showed that the spectral efficiency was higher for the cavity target in comparison to the plate or foil target, while it decreased with an increase in the defocus distance. The source's spectra and the EUV emission intensity normalized to the incident pulse energy at 45 from the target normal were characterized for the in-band (2% of bandwidth) region as a function of laser energy spanning from 46 mJ to 600 mJ for the pure tin plate target. The energy normalized EUV emission was found to increase with the increasing incident pulse energy. It reached the optimum value for the laser energy of around 343 mJ, after which it dropped rapidly.

本文结合安康水电站3号机组的实际情况,介绍了BYG-Ⅱ型局部放电在线监测系统安装过程,同时较为详细地阐释了现场调试工作非常重要的一项:校正脉冲响应试验。

基于软件行业需求和人才培养质量,本文对软件专业工程教育改革与创新实践进行了研究与探索,其做法和措施对提升软件工程人才培养质量、增强软件人才竞争力具有较强的借鉴作用和指导意义.

本文介绍了生物质燃料,总结了层燃工业锅炉燃煤改生物质工作内容,锅炉改造以提高锅炉热效率、节能减排为目的,说明了此项工作在节能与环保上的重大意义。

Zebrafish is a valuable vertebrate model in life science research. In the zebrafish research, segmentation of zebrafish embryo images is a prerequisite for subsequent processing and analysis. Specifically, shape analysis of zebrafi sh’s two important organs, the dorsal diencephalon and the ventral midbrain, is signifi cant for studying the mutants caused by gene expression. Nevertheless, due to non-uniform intensity distribution and weak boundaries in dorsal diencephalon and ventral midbrain microscopic images, classical segmentation methods are unable to determine the precise boundaries. In this paper, a novel segmentation technique for zebrafish embryo images is proposed based on active contour model, which includes region-based active contour model and geodesic active contour. Finally, the effectiveness of this approach is confirmed by the experimental results that the agreement between the algorithm and manual segmentation is more than 90%.

Fan is the power soure of the ventilation system in coal mine,use to providing fresh air for underground,dilution poisonous and harmful gas during the process of coal mine production.The 121th cluse in the<Law On Safety In Mines> provides,"We must ensure that the main fan uninterrupted operation",We must ensure that the spare fan can start in 10 minutes".Obviously,it is the primary issue to ensure the main fan uninterrupted operation.

Based on the theory of the mathematical model of induction motor, the model of induction motor vector control is proposed with the simulation toolkit of Matlab/Simulink, and the related sub-system modules are described in detail and the specific illustrations of the sub-system are also given. Take a simulation of the system, the results such as the waveforms of the current, speed and so on could be got. The simulation results verify the model is correct, and the control system is effective, and the system has good dynamic and static performance.

近几年来,大跨度空间管桁架钢结构因其含钢量低、造型独特优美、施工周期短等优点已广泛应用于会展中心、体育场、飞机场等大型民用标志性建筑。铸钢节点则因其特有的性能,在国外已广泛应用于大跨度空间管桁架钢结构中的重要节点,国内也在逐步推建筑中均应用到了铸钢节点。在这些工程中,我们取得了一些铸钢节点设计、铸造、焊接的经验。铸钢节点一般应用于荷载较大、受力复杂的关键部位,其可靠性直接关系到整个结构的安全,十分重要。

运用UG进行叶片的准确CAD三维建模,特别是叶身部分。通过转换格式并导入patran中,进行复合材料叶片有限元分析,比较叶片各处的应力,可以为叶片的设计制造提供帮助和依据,并对于复合材料在叶片这一领域的应用具有重要意义。

针对车间高压配电柜老化严重,变压器长期满负荷运行,供电系统不稳定,功率因数低等情况,重新设计了滤波系统,升级了综合保护装置、调整了供电结构;特别是滤波系统全面升级改造后效果比较显著,功率因数保持在0.95以上。

Semiconductor light-emitting diode (LED) has now become one of the most popular lighting devices. Before diodes are put into process of package, they need be inspected and graded strictly, so following waste will be saved. Cost of inspection and sort is relatively high, it is urgently needed to improve sort efficiency and reduce sort time. This is a problem needs comprehensive consideration. Sort performance is influenced by acts such as feeding, ejecting, transporting, placing, recycle bin positioning, and so on. Stochastic Petri net model of concurrent control of multi-shafts scheduling is built to analyze the performance and its influenced factors. It can be revealed that positioning of recycle bins is the major influence factor. Because of this, a path planning method according grade, the diodes with same grade should get priority to be sorted first, is put forward. Techniques about die search and merge by grade, traversal of forward and backtrack with cross priority are described in detail. With reasonable simulations, this optimization is obviously proved effective to reduce sort time and improve diodes production rate.