中国开放科研知识云: 检索

Influence of collecting pipe structure on external characteristics and wake flow of roto-jet pump 期刊论文
Harbin Gongcheng Daxue Xuebao/Journal of Harbin Engineering University, 2021, 卷号: 42, 期号: 3, 页码: 368-375
作者: Huang, Qi; Liu, Zailun; Li, Qifei; Quan, Hui; Zeng, Jilai

收藏 | 浏览/下载：5/0 | 提交时间：2022/02/17

Efficiency Jet pumps Pipe Reynolds number Wakes Collecting pipes Different structure External characteristic Linear pressure Numerical calculation Relative radius Research object Reynolds stress

Competitive collection under channel inconvenience in closed-loop supply chain 期刊论文
European Journal of Operational Research, 2019, 卷号: 275, 页码: 155-166
作者: He, Qidong; Wang, Nengmin; Yang, Zhen; He, Zhengwen; Jiang, Bin

收藏 | 浏览/下载：12/0 | 提交时间：2019/11/19

Centralized models Closed-loop supply chain Competitive collecting Coordination mechanisms Customer behaviour Decentralized models Environmental pollutions Recovery efficiency

Experiment on performance of all-glass vacuum tube solar array heating system 期刊论文
Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering, 2017, 卷号: 33, 期号: 11, 页码: 240-247
作者: Li, Jinping; Kong, Ying; Xu, Zhe; Si, Zetian

收藏 | 浏览/下载：9/0 | 提交时间：2020/11/14

Buildings Collector efficiency Data acquisition Digital storage Electron tubes Energy efficiency Energy utilization Enthalpy Floors Flow of water Glass Heat losses Heating equipment Instrument testing Monomers Solar cell arrays Solar energy Space heating Tanks (containers) Temperature Tubes (components) Water towers Wind Collecting efficiency Collection efficiency Constant flow rates Economic perspective Floor radiation heating Heat consumption of buildings Heating performance Solar heating system

Experiment on active solar heating effect for monomer building in northwest region 期刊论文
Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering, 2016, 卷号: 32, 期号: 21, 页码: 217-222
作者: Li, Jinping; Si, Zetian; Kong, Ying; Wang, Lei; Zhen, Xiaofei

收藏 | 浏览/下载：11/0 | 提交时间：2020/11/14

Boiler circulation Buildings Coal Coal fired boilers Collector efficiency Energy efficiency Floors Fossil fuel power plants Heat pipes Heating Investments Monomers Radiators Rural areas Solar energy Space heating Temperature Thermal comfort Water Collecting efficiency Economic performance Energy supplies Experimental buildings External wall insulations Floor heating systems Heating in rural areas Indoor thermal comfort

关于砖与可持续性的4个问题 期刊论文
2016, 2016
张利; ZHANG Li

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Thermal performance of over-ground household biogas production system heated by solar energy 期刊论文
Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering, 2015, 卷号: 31, 期号: 15, 页码: 196-200
作者: Feng, Rong; Li, Jinping; Li, Xiuzhen; Yang, Jieyuan

收藏 | 浏览/下载：8/0 | 提交时间：2020/11/14

Biogas Collector efficiency Electron tubes Flow of water Heat losses Heat pipes Heat transfer coefficients Heating Rural areas Solar energy Solar radiation Solar water heaters Temperature Water Water heaters Collecting efficiency Design optimization Household biogas Inlet water temperatures Lanzhou University of Technology Renewable energies Temperature controllers Thermal Performance

Experimental study of electricity generation by photovoltaic thermal collectors: comparison with conventional photovoltaic panels 会议论文
Proceedings of ISES Solar World Congress 2007. Solar Energy and Human Settlement, ISES Solar World Congress 2007. Solar Energy and Human Settlement, Beijing, China, INSPEC
Jiachen Su; Shujuan Wang; Changhe Chen

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γ能谱测量中的便携式多道研制及体源样品形状选择 学位论文
: 四川大学, 2008
作者: 张文德

收藏 | 浏览/下载：1/0 | 提交时间：2019/04/19

portable γ spectrometer nuclear data collecting Monte Carlo’s method detective efficiency

Research on the support structure of the primary mirror of large-aperture telescope (EI CONFERENCE) 会议论文
3rd International Symposium on Advanced Optical Manufacturing and Testing Technologies, AOMATT 2007: Large Mirrors and Telescopes, July 8, 2007 - July 12, 2007, Chengdu, China
Yang W.; Jingxu Z.

收藏 | 浏览/下载：22/0 | 提交时间：2013/03/25

Large-aperture telescope can be used in surveying battlefield researching landform searching object real-time monitoring imaging detecting and identifying spatial targets and so on. A large-aperture telescope for achieving high resolution power is designed to monitor spatial target and image in real time. Real-time monitoring plays an important role in military conflicts. The orbit parameter of object quantity geometrical shape parameter and so on can be obtained by detect spatial target. With the development of optical technology people require larger aperture in optics-electronic (OE) system. By increasing optical aperture the ability of collecting light and resolution power in the system can be enhanced. But the support structure of the primary mirror of large-aperture telescope will be a very difficult problem. With the increase of primary mirror aperture the weight of the primary mirror will become larger than before. The root mean square (rms) of the primary mirror is affected by many factors such as deadweight deformation of heat environment and so on. Due to the primary mirror of telescope is an important component of telescope system. By reducing the weight of primary mirror precision of the system is ensured. During the designing phase one can consider the supporting project of the primary mirror synthetically and analyze it roundly according to technical requirement of optical system and the effect factors. The final structural design can be reasonable. In an astronomical telescope the surface of reflector is an important part for collecting dark radiation of celestial bodies. Its surface shape will have an effect on collecting efficiency of telescope radiant energy directly. So the rms must be very high. Optical system of large aperture small wavelength and small focus can receive maximal light intensity. For ground-based optical astronomical telescope the design proposed in the paper can satisfy the requirement of the possible minimum atmosphere seeing at astronomical observatory site and exert the use efficiency of the telescope adequately. So the accuracy of the traditional surface of reflector can assure that 90% of all the light energy can be focused on within the angle diameter range of the minimum atmosphere seeing then 100% of light energy should be focused on the angle diameter range of minimum atmosphere seeing. Because the rms of mirror is very high precise surface machining and accurate the support of mirror are very important tasks during designing and manufacturing the telescope. In the paper various support techniques of a large-aperture telescope primary mirror are discussed and a 3.5 meter telescope system at the Starfire Optical Range (SOR) overviewed simply which was operated by the Directed Energy Directorate of the Air Force Research Laboratory Kirtland AFB NM USA from the ground-based O-E system for the observations of spatial target. We also analyze Theoretical elastic deformation of the Steward Observatory 2.3 meter mirror is analyzed.

The signal extraction of fetal heart rate based on wavelet transform and BP neural network (EI CONFERENCE) 会议论文
Third International Conference on Experimental Mechanics and Third Conference of the Asian Committee on Experimental Mechanics, November 29, 2004 - December 1, 2004, Singapore, Singapore
Hong Y. X.; Cheng Z. B.; Dai F. H.

收藏 | 浏览/下载：14/0 | 提交时间：2013/03/25

This paper briefly introduces the collection and recognition of bio-medical signals the other threading is analyzing data. Using the method designs the method to collect FM signals. A detailed discussion on the system hardware it is broaden to analyze the signal in real-time. Wavelet transform to remove the main interference in the FM and by adding time-window to recognize with BP network structure and functions is also given. Under LabWindows/CVI Finally the results of collecting signals and BP networks are discussed.8 pregnant women's signals of FM were collected successfully by using the sensor. The correctness rate of BP network recognition is about 83.3% by using the above measure. the hardware and the driver do compatible the hardware equipment work properly actively. The paper adopts multi threading technology for real-time analysis and makes use of latency time of CPU effectively expedites program reflect speed improves the program to perform efficiency. One threading is collecting data

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