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A j,υ model for the analysis and prediction of tides 被引量:1
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作者 Chen Zongyong, Huang Zuke, Zhou Tianhua, Tang Enxiang and Wang Yuzhou Ocean University of Qingdao,Qingdao,China No, 57653 Unit of Chinese People’s Liberation Army,China 《Acta Oceanologica Sinica》 SCIE CAS CSCD 1990年第4期475-486,共12页
In this paper, the j, υ corrected formulae of the amplitudes and the phases of 58 astronomical constituents are given, and the models for the analysis and prediction of 169 constituents are presented. The new Cartwri... In this paper, the j, υ corrected formulae of the amplitudes and the phases of 58 astronomical constituents are given, and the models for the analysis and prediction of 169 constituents are presented. The new Cartwright's calculated results of the tidal potential are used, and the quadratic analysis is made. It has been proved by a number of trials that the harmonic constants of constituents are more stable and the accuracy of the predicted result reliable. 展开更多
关键词 model for the analysis and prediction of tides A j
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Analysis and Prediction for China's Economy in '99
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《China's Foreign Trade》 1999年第1期46-46,共1页
关键词 analysis and prediction for China’s Economy in
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Analysis and Prediction of '94-'95 Auto Market in China
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《中国汽车(英文版)》 1995年第1期16-18,共3页
After a sluggish market in 1994, both the sale and the production of automobiles will be raised constantly in China, especially in the second half of 1995. In order to understand this, we shall begin with the analysis... After a sluggish market in 1994, both the sale and the production of automobiles will be raised constantly in China, especially in the second half of 1995. In order to understand this, we shall begin with the analysis of the auto market in 1994. Retrospect of China’s Auto Market in 展开更多
关键词 analysis and prediction of Auto Market in China
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Simulation and Analysis of Back Siltation in a Navigation Channel Using MIKE 21 被引量:2
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作者 ZHANG Kuncheng LI Qingjie +4 位作者 ZHANG Jing SHI Hongyuan YU Jing GUO Xinchang DU Yonggang 《Journal of Ocean University of China》 SCIE CAS CSCD 2022年第4期893-902,共10页
The channel back-siltation problem has been restricting the development of channels,and its monitoring is limited by funds and natural conditions.Moreover,predicting the channel back-siltation situation in a timely an... The channel back-siltation problem has been restricting the development of channels,and its monitoring is limited by funds and natural conditions.Moreover,predicting the channel back-siltation situation in a timely and accurate manner is difficult.Hence,a numerical simulation of the back-siltation problem in the sea area near the channel is of great significance to the maintenance of a channel.In this study,the back siltation of a deep-water channel in the Lanshan Port area of the Port of Rizhao after dredging is predicted.This paper relies on the MIKE 21 software to establish the wave,tidal current,and sediment numerical models and uses measured data from two observation stations in the study area for verification.On this basis,taking one month as an example,the entire project channel was divided into five sections,and three observation points were set on each section.The results show that the area with offshore siltation is located in the northerly direction of the artificial anti-wave building.Siltation occurred on the northern seabed in the sea a little farther from the shore.Siltation occurred on the seabed surface far away from the shoreline,and with the increase in the distance from the shoreline,the amount of siltation in the south,center,and north became gradually closed,and the results can be used to guide actual engineering practices.This study will play a positive role in promoting the dredging project of Rizhao Lanshan Port. 展开更多
关键词 channel back siltation numerical simulation back silting analysis and prediction
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Research on Carbon Peak and Carbon Neutrality Technological Pathways in the Chinese Papermaking Industry
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作者 Zaifeng Zhou Fuxiang Wei 《Paper And Biomaterials》 CAS 2023年第4期69-79,共11页
Against the backdrop of the dual carbon goals,the papermaking industry in China faces significant pressure to reduce emissions and lower carbon intensity.Based on historical data of energy consumption in the pulp and ... Against the backdrop of the dual carbon goals,the papermaking industry in China faces significant pressure to reduce emissions and lower carbon intensity.Based on historical data of energy consumption in the pulp and paper industry in China from 2000 to 2020,this study analyzed the current status of paper production and energy consumption in China.Two methods were employed to predict the growth trend of paper production in China,and three carbon dioxide emission accounting methods were compared.The study used an accounting method based on the industry’s overall energy consumption and predicted the carbon dioxide(CO_(2))emissions of the Chinese papermaking industry from 2021 to 2060 under three scenarios.The study identified the timing for achieving carbon peak and proposed the measures for carbon neutrality.The results indicated that:(1)the CO_(2)emissions of the Chinese papermaking industry in 2020 were 111.98 million tons.(2)Under low-demand,high-demand,and baseline scenarios,the papermaking industry is expected to achieve carbon peak during the“14th Five-Year Plan”period.(3)In 2060,under the three scenarios,CO_(2)emissions from the papermaking industry will decrease by 11%-31%compared to the baseline year.However,there will still be emissions of 72-93 million tons,requiring reductions in fossil energy consumption at the source,increasing forestry carbon sequestration and utilization of Carbon Capture,Utilization and Storage(CCUS)technology,and taking measures such as carbon trading to achieve carbon neutrality. 展开更多
关键词 pulp and paper industry carbon dioxide emissions scenario analysis and prediction carbon peak and carbon neutrality decarbonization pathway
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System Architecture and Key Technologies of Network Security Situation Awareness System YHSAS 被引量:7
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作者 Weihong Han Zhihong Tian +2 位作者 Zizhong Huang Lin Zhong Yan Jia 《Computers, Materials & Continua》 SCIE EI 2019年第4期167-180,共14页
Network Security Situation Awareness System YHSAS acquires,understands and displays the security factors which cause changes of network situation,and predicts the future development trend of these security factors.YHS... Network Security Situation Awareness System YHSAS acquires,understands and displays the security factors which cause changes of network situation,and predicts the future development trend of these security factors.YHSAS is developed for national backbone network,large network operators,large enterprises and other large-scale network.This paper describes its architecture and key technologies:Network Security Oriented Total Factor Information Collection and High-Dimensional Vector Space Analysis,Knowledge Representation and Management of Super Large-Scale Network Security,Multi-Level,Multi-Granularity and Multi-Dimensional Network Security Index Construction Method,Multi-Mode and Multi-Granularity Network Security Situation Prediction Technology,and so on.The performance tests show that YHSAS has high real-time performance and accuracy in security situation analysis and trend prediction.The system meets the demands of analysis and prediction for large-scale network security situation. 展开更多
关键词 Network security situation awareness network security situation analysis and prediction network security index association analysis multi-dimensional analysis
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Stability-mutation feature identification of Web search keywords based on keyword concentration change ratio
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作者 Hongtao LU Guanghui YE Gang LI 《Chinese Journal of Library and Information Science》 2014年第3期33-44,共12页
Purpose: The aim of this paper is to discuss how the keyword concentration change ratio(KCCR) is used while identifying the stability-mutation feature of Web search keywords during information analyses and predictions... Purpose: The aim of this paper is to discuss how the keyword concentration change ratio(KCCR) is used while identifying the stability-mutation feature of Web search keywords during information analyses and predictions.Design/methodology/approach: By introducing the stability-mutation feature of keywords and its significance, the paper describes the function of the KCCR in identifying keyword stability-mutation features. By using Ginsberg's influenza keywords, the paper shows how the KCCR can be used to identify the keyword stability-mutation feature effectively.Findings: Keyword concentration ratio has close positive correlation with the change rate of research objects retrieved by users, so from the characteristic of the 'stability-mutation' of keywords, we can understand the relationship between these keywords and certain information. In general, keywords representing for mutation fit for the objects changing in short-term, while those representing for stability are suitable for long-term changing objects. Research limitations: It is difficult to acquire the frequency of keywords, so indexes or parameters which are closely related to the true search volume are chosen for this study.Practical implications: The stability-mutation feature identification of Web search keywords can be applied to predict and analyze the information of unknown public events through observing trends of keyword concentration ratio.Originality/value: The stability-mutation feature of Web search could be quantitatively described by the keyword concentration change ratio(KCCR). Through KCCR, the authors took advantage of Ginsberg's influenza epidemic data accordingly and demonstrated how accurate and effective the method proposed in this paper was while it was used in information analyses and predictions. 展开更多
关键词 Web search Web search keyword Information analysis and prediction Concentration change ratio Feature identification Influenza epidemic
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