The assumption widely used in the user equilibrium model for stochastic network was that the probability distributions of the travel time were known explicitly by travelers. However, this distribution may be unavailab...The assumption widely used in the user equilibrium model for stochastic network was that the probability distributions of the travel time were known explicitly by travelers. However, this distribution may be unavailable in reality. By relaxing the restrictive assumption, a robust user equilibrium model based on cumulative prospect theory under distribution-free travel time was presented. In the absence of the cumulative distribution function of the travel time, the exact cumulative prospect value(CPV) for each route cannot be obtained. However, the upper and lower bounds on the CPV can be calculated by probability inequalities.Travelers were assumed to choose the routes with the best worst-case CPVs. The proposed model was formulated as a variational inequality problem and solved via a heuristic solution algorithm. A numerical example was also provided to illustrate the application of the proposed model and the efficiency of the solution algorithm.展开更多
In this paper, the backdrop and significance of the research of germ-remaining rice whitener firstly were expatiated. Then, the study progress in China and overseas was summarized. Lastly, the research prospect of thi...In this paper, the backdrop and significance of the research of germ-remaining rice whitener firstly were expatiated. Then, the study progress in China and overseas was summarized. Lastly, the research prospect of this kind of whitener in China was analyzed. It is hoped that it can coach the design of germ-remaining rice whitener.展开更多
Support Vector Machine(SVM) was demonstrated as a potentially useful tool to integrate multi-variables and to produce a predictive map for mineral deposits. The e 1071,a free R package,was used to construct a SVM with...Support Vector Machine(SVM) was demonstrated as a potentially useful tool to integrate multi-variables and to produce a predictive map for mineral deposits. The e 1071,a free R package,was used to construct a SVM with radial kernel function to integrate four evidence layers and to map prospectivity for Gangdese porphyry copper deposits.The results demonstrate that the predicted prospective target area for Cu occupies 20.5%of the total study area and contains 52.4%of the total number of known porphyry copper deposits.The results obtained展开更多
The traffic equilibrium assignment problem under tradable credit scheme(TCS) in a bi-modal stochastic transportation network is investigated in this paper. To describe traveler’s risk-taking behaviors under uncertain...The traffic equilibrium assignment problem under tradable credit scheme(TCS) in a bi-modal stochastic transportation network is investigated in this paper. To describe traveler’s risk-taking behaviors under uncertainty, the cumulative prospect theory(CPT) is adopted. Travelers are assumed to choose the paths with the minimum perceived generalized path costs, consisting of time prospect value(PV) and monetary cost. At equilibrium with a given TCS, the endogenous reference points and credit price remain constant, and are consistent with the equilibrium flow pattern and the corresponding travel time distributions of road sub-network. To describe such an equilibrium state, the CPT-based stochastic user equilibrium(SUE) conditions can be formulated under TCS. An equivalent variational inequality(VI) model embedding a parameterized fixed point(FP) model is then established, with its properties analyzed theoretically. A heuristic solution algorithm is developed to solve the model, which contains two-layer iterations. The outer iteration is a bisection-based contraction method to find the equilibrium credit price, and the inner iteration is essentially the method of successive averages(MSA) to determine the corresponding CPT-based SUE network flow pattern. Numerical experiments are provided to validate the model and algorithm.展开更多
The cumulative prospect theory(CPT) is applied to study travelers' route choice behavior in a degradable transport network. A cumulative prospect theory-based user equilibrium(CPT-UE) model considering stochastic ...The cumulative prospect theory(CPT) is applied to study travelers' route choice behavior in a degradable transport network. A cumulative prospect theory-based user equilibrium(CPT-UE) model considering stochastic perception error(SPE) within travelers' route choice decision process is developed. The SPE is conditionally dependent on the actual travel time distribution, which is different from the deterministic perception error used in the traditional logit-based stochastic user equilibrium. The CPT-UE model is formulated as a variational inequality problem and solved by a heuristic solution algorithm. Numerical examples are provided to illustrate the application of the proposed model and efficiency of the solution algorithm. The effects of SPE on the reference point determination, cumulative prospect value estimation, route choice decision and network performance evaluation are investigated.展开更多
Although small scale mining management is a complex task,many countries in the world have managed to develop mining management regimes that can improve the economic and environmental efficiency of the small scale mini...Although small scale mining management is a complex task,many countries in the world have managed to develop mining management regimes that can improve the economic and environmental efficiency of the small scale mining sector.This paper attempts to explore the mental picture of opportunities and challenges of the environmental management in small scale mining in Tanzania focusing on展开更多
On the basis of analysis on literatures at home and abroad,the composition and advantages of clean foam fracturing fluid are described,and the current researches on its stability,rheology,proppant carrying property an...On the basis of analysis on literatures at home and abroad,the composition and advantages of clean foam fracturing fluid are described,and the current researches on its stability,rheology,proppant carrying property and low damage property are analyzed in detail.The clean foam fracturing fluid,composbd by viscoelastic surfactant,salt solution,foaming agent and gas,is prospectivefor developing unconventional oil and gas resources.This system shows strong proppant carrying capacity,low fluid loss,high fractu-ring effects,strong flowback capacity,and small formation damage,by combining the advantages of clean fracturing fluid and foamfracturing fluid.It has become a focus of fracturing fluids in recent years.Some samples are provided to demonstrate the field appli-cation results of the clean foam fracturing fluid,which further indicates that the system can improve oil well productivity with nodamages to formations.Finally,in view of formula system,foam stabilization mechanism and supporting operation processes,theprospects of clean foam fracturing fluid is pointed out.展开更多
In this research, major and immobile minor and trace elements are used to study the petrology of Yamaghan deposit. Some major elements of least altered samples were used to classify the host rocks and their magma type...In this research, major and immobile minor and trace elements are used to study the petrology of Yamaghan deposit. Some major elements of least altered samples were used to classify the host rocks and their magma type. Considering slight to medium alteration of the host rock, immobile minor and trace elements of more than 110 samples were used to get more confidential results as well. The results show the high accuracy and reliability of the implemented techniques in the study area.展开更多
The region of existence of phases in equilibrium with the solid solution based on palladium. Presented to analyze the current situation in the market of precious metals in Russia. Provides information about the produc...The region of existence of phases in equilibrium with the solid solution based on palladium. Presented to analyze the current situation in the market of precious metals in Russia. Provides information about the production and processing of precious metals. Prospects for the most likely path of development of the Russian market of precious metals.展开更多
Introduction I am honored to have this opportunity to address the distinguished experts of the Shanghai Institutes for International Studies,SIIS on the issue of Asia in the Era of Globalization and Prospect for Japan...Introduction I am honored to have this opportunity to address the distinguished experts of the Shanghai Institutes for International Studies,SIIS on the issue of Asia in the Era of Globalization and Prospect for Japan-China Relations.I wish to thank Dr.Yang Jiemian。展开更多
The concept of new comprehensive sea power established in Japan shows that a marine development course is actively taken by Japanese government,for the purpose of realizing the country’s sustainable development.Howev...The concept of new comprehensive sea power established in Japan shows that a marine development course is actively taken by Japanese government,for the purpose of realizing the country’s sustainable development.However,Japan is actively developing its naval forces to fight for sea interests,so that an adverse effect has been played on the development of China.In the sea power dispute between China and Japan,the core interests of both countries are involved,so that the cold situation of the political,economic and cultural exchanges has been caused.In view of the sea power disputes between China and Japan,cooperation and negotiation should be promoted by China more commonly;a concept of sea power and a marine strategy conforming to the actual national conditions should be established;the mutually beneficial and win-win situation should be actively promoted with the neighboring countries;the studies of the international maritime law and the establishment of marine legal system should be strengthened.展开更多
基金Project(2012CB725400)supported by the National Basic Research Program of ChinaProjects(71271023,71322102,7121001)supported by the National Natural Science Foundation of China
文摘The assumption widely used in the user equilibrium model for stochastic network was that the probability distributions of the travel time were known explicitly by travelers. However, this distribution may be unavailable in reality. By relaxing the restrictive assumption, a robust user equilibrium model based on cumulative prospect theory under distribution-free travel time was presented. In the absence of the cumulative distribution function of the travel time, the exact cumulative prospect value(CPV) for each route cannot be obtained. However, the upper and lower bounds on the CPV can be calculated by probability inequalities.Travelers were assumed to choose the routes with the best worst-case CPVs. The proposed model was formulated as a variational inequality problem and solved via a heuristic solution algorithm. A numerical example was also provided to illustrate the application of the proposed model and the efficiency of the solution algorithm.
文摘In this paper, the backdrop and significance of the research of germ-remaining rice whitener firstly were expatiated. Then, the study progress in China and overseas was summarized. Lastly, the research prospect of this kind of whitener in China was analyzed. It is hoped that it can coach the design of germ-remaining rice whitener.
文摘Support Vector Machine(SVM) was demonstrated as a potentially useful tool to integrate multi-variables and to produce a predictive map for mineral deposits. The e 1071,a free R package,was used to construct a SVM with radial kernel function to integrate four evidence layers and to map prospectivity for Gangdese porphyry copper deposits.The results demonstrate that the predicted prospective target area for Cu occupies 20.5%of the total study area and contains 52.4%of the total number of known porphyry copper deposits.The results obtained
基金Project(BX20180268)supported by National Postdoctoral Program for Innovative Talent,ChinaProject(300102228101)supported by Fundamental Research Funds for the Central Universities of China+1 种基金Project(51578150)supported by the National Natural Science Foundation of ChinaProject(18YJCZH130)supported by the Humanities and Social Science Project of Chinese Ministry of Education
文摘The traffic equilibrium assignment problem under tradable credit scheme(TCS) in a bi-modal stochastic transportation network is investigated in this paper. To describe traveler’s risk-taking behaviors under uncertainty, the cumulative prospect theory(CPT) is adopted. Travelers are assumed to choose the paths with the minimum perceived generalized path costs, consisting of time prospect value(PV) and monetary cost. At equilibrium with a given TCS, the endogenous reference points and credit price remain constant, and are consistent with the equilibrium flow pattern and the corresponding travel time distributions of road sub-network. To describe such an equilibrium state, the CPT-based stochastic user equilibrium(SUE) conditions can be formulated under TCS. An equivalent variational inequality(VI) model embedding a parameterized fixed point(FP) model is then established, with its properties analyzed theoretically. A heuristic solution algorithm is developed to solve the model, which contains two-layer iterations. The outer iteration is a bisection-based contraction method to find the equilibrium credit price, and the inner iteration is essentially the method of successive averages(MSA) to determine the corresponding CPT-based SUE network flow pattern. Numerical experiments are provided to validate the model and algorithm.
基金Project(2012CB725400)supported by the National Basic Research Program of ChinaProjects(71271023,71322102)supported by the National Science Foundation of ChinaProject(2015JBM053)supported by the Fundamental Research Funds for the Central Universities,China
文摘The cumulative prospect theory(CPT) is applied to study travelers' route choice behavior in a degradable transport network. A cumulative prospect theory-based user equilibrium(CPT-UE) model considering stochastic perception error(SPE) within travelers' route choice decision process is developed. The SPE is conditionally dependent on the actual travel time distribution, which is different from the deterministic perception error used in the traditional logit-based stochastic user equilibrium. The CPT-UE model is formulated as a variational inequality problem and solved by a heuristic solution algorithm. Numerical examples are provided to illustrate the application of the proposed model and efficiency of the solution algorithm. The effects of SPE on the reference point determination, cumulative prospect value estimation, route choice decision and network performance evaluation are investigated.
文摘Although small scale mining management is a complex task,many countries in the world have managed to develop mining management regimes that can improve the economic and environmental efficiency of the small scale mining sector.This paper attempts to explore the mental picture of opportunities and challenges of the environmental management in small scale mining in Tanzania focusing on
文摘On the basis of analysis on literatures at home and abroad,the composition and advantages of clean foam fracturing fluid are described,and the current researches on its stability,rheology,proppant carrying property and low damage property are analyzed in detail.The clean foam fracturing fluid,composbd by viscoelastic surfactant,salt solution,foaming agent and gas,is prospectivefor developing unconventional oil and gas resources.This system shows strong proppant carrying capacity,low fluid loss,high fractu-ring effects,strong flowback capacity,and small formation damage,by combining the advantages of clean fracturing fluid and foamfracturing fluid.It has become a focus of fracturing fluids in recent years.Some samples are provided to demonstrate the field appli-cation results of the clean foam fracturing fluid,which further indicates that the system can improve oil well productivity with nodamages to formations.Finally,in view of formula system,foam stabilization mechanism and supporting operation processes,theprospects of clean foam fracturing fluid is pointed out.
文摘In this research, major and immobile minor and trace elements are used to study the petrology of Yamaghan deposit. Some major elements of least altered samples were used to classify the host rocks and their magma type. Considering slight to medium alteration of the host rock, immobile minor and trace elements of more than 110 samples were used to get more confidential results as well. The results show the high accuracy and reliability of the implemented techniques in the study area.
文摘The region of existence of phases in equilibrium with the solid solution based on palladium. Presented to analyze the current situation in the market of precious metals in Russia. Provides information about the production and processing of precious metals. Prospects for the most likely path of development of the Russian market of precious metals.
文摘Introduction I am honored to have this opportunity to address the distinguished experts of the Shanghai Institutes for International Studies,SIIS on the issue of Asia in the Era of Globalization and Prospect for Japan-China Relations.I wish to thank Dr.Yang Jiemian。
文摘The concept of new comprehensive sea power established in Japan shows that a marine development course is actively taken by Japanese government,for the purpose of realizing the country’s sustainable development.However,Japan is actively developing its naval forces to fight for sea interests,so that an adverse effect has been played on the development of China.In the sea power dispute between China and Japan,the core interests of both countries are involved,so that the cold situation of the political,economic and cultural exchanges has been caused.In view of the sea power disputes between China and Japan,cooperation and negotiation should be promoted by China more commonly;a concept of sea power and a marine strategy conforming to the actual national conditions should be established;the mutually beneficial and win-win situation should be actively promoted with the neighboring countries;the studies of the international maritime law and the establishment of marine legal system should be strengthened.
