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optimization model analysis of centralized groundwater source heat pump system in heating season

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Frontiers in Energy 2015年第3期9卷 343-361页

作者： Shilei LU Yunfang QI Zhe CAI Yiran LI School of Environmental Science and Engineering Tianjin University Tianjin 300072 China

The ground-water heat-pump system （GWHP） provides a high efficient way for heating and cooling while consuming a little electrical energy. Due to the lack of scientific guidance for operating control strategy, the coefficient of performance （COP） of the system and units are still very low. In this paper, the running strategy of GWHP was studied. First, the groundwater thermal transfer calculation under slow heat transfixion and transient heat transfixion was established by calculating the heat transfer simulation software Flow Heat and using correction factor. Next, heating parameters were calculated based on the building heat load and the terminal equipment characteristic equation. Then, the energy consumption calculation model for units and pumps were established, based on which the optimization method and constraints were established. Finally, a field test on a GWHP system in Beijing was conducted and the model was applied. The new system operation optimization idea for taking every part of the GWHP into account that put forward in this paper has an important guiding significance to the actual operation of underground water source heat pump.

关键词： optimization model groundwater source heatpump system theoretical analysis example verification,heating season

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optimization model of unascertained measurement for underground mining method selection and its application

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Journal of Central South University 2010年第4期17卷 744-749页

作者：刘爱华董蕾董陇军 School of Resources and Safety Engineering Central South University

An optimization model of underground mining method selection was established on the basis of the unascertained measurement *** the geologic conditions,technology,economy and safety production,ten main factors influencing the selection of mining method were taken into account,and the comprehensive evaluation index system of mining method selection was *** unascertained evaluation indices corresponding to the selected factors for the actual situation were solved both qualitatively and *** measurement standards were ***,the unascertained measurement function of each evaluation index was *** index weights of the factors were calculated by entropy theory,and credible degree recognition criteria were established according to the unascertained measurement *** results of mining method evaluation were obtained using the credible degree criteria,thus the best underground mining method was ***,this model was employed for the comprehensive evaluation and selection of the chosen standard mining methods in Xinli Gold Mine in Sanshandao of *** results show that the relative superiority degrees of mining methods can be calculated using the unascertained measurement optimization model,so the optimal method can be easily ***,the proposed method can take into account large amount of uncertain information in mining method selection,which can provide an effective way for selecting the optimal underground mining method.

关键词： mining engineering underground mining method optimization model unascertained measurement theory information entropy

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An optimization model for fragmentation-based routing in delay tolerant networks

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Science China(Information Sciences) 2016年第2期59卷 185-200页

作者： Xuyan BAO Yong ZHANG Da GUO Mei SONG School of Electronic Engineering Beijing University of Posts and Telecommunications

The explosive growth of mobile data traffic has raised big penetration to cellular network. Fortunately, offloading part of traffic through Delay Tolerant Network(DTN) would be a promising option to relieve load pressure. However, the existing routing strategies designed for DTNs are inappropriate in offloading scenario, where i) large data item would take on the dominance of mobile traffic, ii) centralized control can be exploited with merge between DTN and cellular network. To improve the routing performance of large data transmission, we propose a novel optimization model by creating two-tier solution space based on fragmentation,maximizing the probability that the requested data item is successfully delivered before expiration, taking limited buffer space as constraint metric. Moreover, a specific routing scheme is instantiated from our model, which is supported by uniform fragmentation and fine-grained path selection. Extensive trace-driven simulations show that our scheme is more appropriate for offloading case with outstanding performance in terms of replication overhead and acceptable routing capability.

关键词： multi-path routing delay tolerant networks optimization model data offloading stochastic orderings

Balancing timber production and habitat conservation of Okinawa Rails(Gallirallus okinawae): Application of a harvest scheduling optimization model in subtropical forest in Okinawa, Japan

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Journal of Mountain Science 2019年第12期16卷 2770-2782页

作者： KONOSHIMA Masashi YOSHIMOTO Atsushi Faculty of Agriculture University of the Ryukyusi SenbaruNishihara ChoOkinawa903-0213 Japan Institute of Statistical Mathematics(ISM) 10-3 Midori-choTachikawaTokyo 190-8562Japan

Finding the right balance between timber production and the management of forest-dependent wildlife species,present a difficult challenge for forest resource managers and policy makers in Okinawa,Japan.A possible explanation of this can be found in the unique nature of the forest management area which is populated with various kinds of rare and endangered *** issue has been brought to light as a result of the nomination of northern Okinawa Island in 2018 as a candidate for World Natural Heritage *** nomination has raised public awareness to the possibility of conflicting management objectives between timber extraction and the conservation of habitat for forest-dependent wildlife *** exclusively for one objective over the other may fail to meet the demand for both forest products and wildlife habitat,ultimately jeopardizing the stability of human and wildlife *** is therefore important to achieve a better balance between the objective of timber production and conservation of wildlife *** the significance of this subject area,current ongoing discussions on how to effectively manage for forest resources,often lack scientific basis to make sound judgement or evaluate tradeoffs between conflicting *** the effect of these forest management activities on wildlife habitat provides useful and important information needed to make forest management and policy *** this study we develop a spatial timber harvest scheduling model that incorporates habitat suitability index(HSI)models for the Okinawa Rail(Gallirallus okinawae),an endangered avian species found on Okinawa,*** illustrate how the proposed coupling model assembles spatial information,which ultimately aids the study of forest management effects on wildlife habitat,we apply these models to a forest area in Okinawa and conduct a simple simulation analysis.

关键词： Harvest scheduling Habitat suitability index model optimization model Timber production Wildlife habitat

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Hybrid optimization model and its application in prediction of gas emission

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Journal of Coal Science & Engineering(China) 2012年第3期18卷 280-284页

作者： FU Hua SHU Dan-dan KANG Hai-chao YANG Yi-kui Faculty of Electrical and Engineering Control Liaoning Technology UniversityHuludao 125105China

According to the complex nonlinear relationship between gas emission and its effect factors, and the shortcomings that basic colony algorithm is slow, prone to early maturity and stagnation during the search, we introduced a hybrid optimization strategy into a max-rain ant colony algorithm, then use this improved ant colony algorithm to estimate the scope of RBF network parameters. According to the amount of pheromone of discrete points, the authors obtained from the interval of net- work parameters, ants optimize network parameters. Finally, local spatial expansion is introduced to get further optimization of the network. Therefore, we obtain a better time efficiency and solution efficiency optimization model called hybrid improved max-min ant system （H1-MMAS）. Simulation experiments, using these theory to predict the gas emission from the working face, show that the proposed method have high prediction feasibility and it is an effective method to predict gas emission.

关键词： max-rain ant colony algorithm optimization model gas emission prediction

optimization model of Cattle Husbandry for Rural Household in Cambodia

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Journal of Agricultural Chemistry and Environment 2016年第1期5卷 6-11页

作者： Siek Darith Shiwei Xu Wen Yu Ahmed Abdul-Gafar Agricultural Information Institute Chinese Academy of Agricultural Sciences Beijing China

Cambodia is one of the Southeast Asia. With the agricultural market integration, Cambodia rural household is adjusting livestock structure naturally. In order to provide suitable support for agriculture policy, the authors conducted a survey on 204 rural household in Cambodia. This article uses the optimization model, considering rural labor, cattle size, and animal disease risk, to analyze and get optimum result range. The result shows that the more off-farm job opportunity, suitable cattle feed structure, and investment on public health for cattle, the household income in rural Cambodia will increase.

关键词： Cattle Income optimization model Policy Cambodia

Research on No-load Decision of Airport Taxi Based on optimization model

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Research on No-load Decision of Airport Taxi Based on Optimi...

Cross-Layer optimization model for UWB Sensor Network

作者： Xiang Yifei School of Mathematics and Statistics Wuhan University

With the facilitation of transportation, taxis have become one of the main modes of transportation, but no-load taxis will cause damage to revenue. Based on this, this article first determines the total passenger flow at the airport and the passenger flow in a day based on factors such as seasons and flights distribution law, so as to get the driver’s decision plan. Then combine the processed data to estimate the parameters, and solve the model to get the no-load decision plan of the taxi. Compared with the actual taxi detention situation, the model accuracy rate of the scheme is close to 70%. After that, the influence of factors such as season, the probability of choosing a taxi, the number of pick-up points, and the average pick-up time on the driver’s decision is studied, and the relevant factors and the practical significance of the model decision are given. Finally, three types are introduced. The common pick-up point setting mode is to establish a multi-objective optimization model. Through a large number of Monte Carlo simulations, it is finally found that the parallel-departure multi-lane departure mode is better than the other departure modes. In the best case, there are 12 berths and the actual berths in Hongqiao Airport are the same.

关键词： no-load problem parking space optimization model Monte Carlo simulation

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Cross-Layer Optimization Model for UWB Sensor Network

Two level optimization model of construction safety for prefabricated construction and its artificial immune algorithm

2007年国际电子商务、工程及科学领域的分布式计算和应用学术研讨会

作者： Yefang Gao 1,2 , Layuan Li 3 , Lin Ouyang 1 1School of Information Engineering, WHUT, Wuhan, 430063, China 2 Unit 94748, Network Center, Nanjing, 210008, China 3 School of Computer Science & Technology, WHUT, Wuhan, 430063, China

Cross-layer design is a promising approach to improve the performance of wireless sensor networks. This paper studies an UWB-based wireless sensor networks and builds a cross-layer optimization model with joint consideration of MAC layer scheduling, PHY layer power control and network layer routing. The model takes advantage of significant benefits of UWB technology, such as huge bandwidth, extremely low power spectral density and large processing gain in the presence of interference and attempts to achieve the maximal data rate of whole network. Simulation results show that the optimal solution of cross-layer optimization model can increase the data rate of network obviously. It also demonstrates that it is feasible and effective to address issues of cross-layer problem with optimization model.

关键词： UWB Wireless Sensor Networks Cross-Layer Design optimization model

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Two level optimization model of construction safety for pref...