On January 11,2025,the 2025 Bejing Roundtable Meeting for International Exhibition Organisations was held in Beijing.The event was co-hosted by the CCPIT Bejing,the Bejing Municipal Commerce Bureau,the Shunyi District...On January 11,2025,the 2025 Bejing Roundtable Meeting for International Exhibition Organisations was held in Beijing.The event was co-hosted by the CCPIT Bejing,the Bejing Municipal Commerce Bureau,the Shunyi District People's Government and the Beijing Chamber of International Commerce.展开更多
In January 2025,the Beijing Chamber of Commerce(Singapore)was officially established.Coinciding with the 35th anniversary of China-Singapore diplomatic relations and the 60th anniversary of Singapore’s independence,i...In January 2025,the Beijing Chamber of Commerce(Singapore)was officially established.Coinciding with the 35th anniversary of China-Singapore diplomatic relations and the 60th anniversary of Singapore’s independence,its founding is part of a timely response to the growing needs of businesses and communities from both Beijing and Singapore to deepen mutual understanding and expand cooperation.As a Chinese person who has lived and worked in Singapore for many years,Feng Jianli,president of the Beijing Chamber of Commerce(Singapore),knows first-hand just how challenging it can be for new immigrants from Beijing to adapt to identity transitions and access local support.The chamber was founded not only to help them take root and thrive,but also to serve as a platform for deeper people-to-people exchange between Singapore and Beijing.展开更多
The surrogate model serves as an efficient simulation tool during the slope parameter inversion process.However,the creep constitutive model integrated with dynamic damage evolution poses challenges in development of ...The surrogate model serves as an efficient simulation tool during the slope parameter inversion process.However,the creep constitutive model integrated with dynamic damage evolution poses challenges in development of the required surrogate model.In this study,a novel physics knowledge-based surrogate model framework is proposed.In this framework,a Transformer module is employed to capture straindriven softening-hardening physical mechanisms.Positional encoding and self-attention are utilized to transform the constitutive parameters associated with shear strain,which are not directly time-related,into intermediate latent features for physical loss calculation.Next,a multi-layer stacked GRU(gated recurrent unit)network is built to provide input interfaces for time-dependent intermediate latent features,hydraulic boundary conditions,and water-rock interaction degradation equations,with static parameters introduced via external fully-connected layers.Finally,a combined loss function is constructed to facilitate the collaborative training of physical and data loss,introducing time-dependent weight adjustments to focus the surrogate model on accurate deformation predictions during critical phases.Based on the deformation of a reservoir bank landslide triggered by impoundment and subsequent restabilization,an elasto-viscoplastic constitutive model that considers water effect and sliding state dependencies is developed to validate the proposed surrogate model framework.The results indicate that the framework exhibits good performance in capturing physical mechanisms and predicting creep behavior,reducing errors by about 30 times compared to baseline models such as GRU and LSTM(long short-term memory),meeting the precision requirements for parameter inversion.Ablation experiments also confirmed the effectiveness of the framework.This framework can also serve as a reference for constructing other creep surrogate models that involve non-time-related across dimensions.展开更多
On May 14th,following the U.S.adjustment of additional tariffs on Chinese goods,American buyers began stockpiling in earnest.Many cross-border e-commerce companies also received a surge of orders.At 7 PM,a bustling Ha...On May 14th,following the U.S.adjustment of additional tariffs on Chinese goods,American buyers began stockpiling in earnest.Many cross-border e-commerce companies also received a surge of orders.At 7 PM,a bustling Hangzhou-based cross-border e-commerce company was alive with multiple languages echoing through its live-streaming rooms as backend order numbers climbed steadily.展开更多
In the context of the Hainan Free Trade Port,Haikou is committed to becoming an international consumer city,with the integration of culture,commerce,tourism,and sports as a key strategy.This article provides an in-dep...In the context of the Hainan Free Trade Port,Haikou is committed to becoming an international consumer city,with the integration of culture,commerce,tourism,and sports as a key strategy.This article provides an in-depth analysis of Haikou’s current status in building an international consumer city through the integration of culture,commerce,tourism,and sports,including its strengths and existing challenges.It explores the significance of this integration for Haikou and proposes targeted development strategies.These strategies aim to enhance the city’s appeal and international competitiveness by integrating resources,innovating business models,and optimizing the environment,thereby promoting the deep integration of culture,commerce,tourism,and sports in Haikou.展开更多
As African economies continue to expand their trade networks,digital transformation and e-commerce have emerged as key drivers of economic development.Ethiopia has embraced this trend,aiming to modernise its logistics...As African economies continue to expand their trade networks,digital transformation and e-commerce have emerged as key drivers of economic development.Ethiopia has embraced this trend,aiming to modernise its logistics and aviation infrastructure to meet the growing demand.展开更多
In order to analyze the effects of different cooperative mechanisms between a mobile device manufacturer and a mobile network operator （ MNO ）, a Stackelberg structure is constructed. The manufacturer acts as a lead...In order to analyze the effects of different cooperative mechanisms between a mobile device manufacturer and a mobile network operator （ MNO ）, a Stackelberg structure is constructed. The manufacturer acts as a leader, while the MNO acts as a follower, i. e., a traditional retailer. Three cooperative mechanisms are considered： the manufacturer does not invest in developing the propriety function and software to support the infrastructure capacity of the MNO; the manufacturer invests in the development; the MNO offers a subsidy to encourage the manufacturer to invest in development. The results reveal that investing in the development can increase the profits of both the manufacturer and the MNO. Furthermore, if the MNO shares certain investment costs with the manufacturer, the MNO may charge higher prices of mobile connection services and mobile value-added services, and the profits of the two players may be enhanced.展开更多
Carries on when the international commerce English translation must the special attention cultural difference, probably finds one in the foreign culture and our country culture to suit the spot. Is engaged in the inte...Carries on when the international commerce English translation must the special attention cultural difference, probably finds one in the foreign culture and our country culture to suit the spot. Is engaged in the international commerce the translation personnel must understand that grasps our country and the foreign land national culture difference, and tries to cause these differences to translate in the process to vanish, simultaneously in translated into the language to find the accurate words and expressions, caused the foreign land culture to translate into the language to reappear. The language is a cultural part, is also the cultural carrier, it is playing the vital role to the culture. Language border translator is not only two language mutual exchanges, is also two cultural transmissions.展开更多
The problems existing in the development of agriculture-related enterprises in earthquake area are evaluated,as well as the prominent issues existing in the process of developing E-commerce,consequently,the correspond...The problems existing in the development of agriculture-related enterprises in earthquake area are evaluated,as well as the prominent issues existing in the process of developing E-commerce,consequently,the corresponding strategies for developing E-commerce in agriculture-related enterprises are proposed.展开更多
A machine-learning approach was developed for automated building of knowledgebases for soil resources mapping by using a classification tree to generate knowledge from trainingdata. With this method, building a knowle...A machine-learning approach was developed for automated building of knowledgebases for soil resources mapping by using a classification tree to generate knowledge from trainingdata. With this method, building a knowledge base for automated soil mapping was easier than usingthe conventional knowledge acquisition approach. The knowledge base built by classification tree wasused by the knowledge classifier to perform the soil type classification of Longyou County,Zhejiang Province, China using Landsat TM bi-temporal images and CIS data. To evaluate theperformance of the resultant knowledge bases, the classification results were compared to existingsoil map based on a field survey. The accuracy assessment and analysis of the resultant soil mapssuggested that the knowledge bases built by the machine-learning method was of good quality formapping distribution model of soil classes over the study area.展开更多
The accountability of electronic commerce protocols is an important aspect to insures security of electronic transaction. This paper proposes to use Finite Automaton (FA) model as a new kind of framework to analyze th...The accountability of electronic commerce protocols is an important aspect to insures security of electronic transaction. This paper proposes to use Finite Automaton (FA) model as a new kind of framework to analyze the transaction protocols in the application of electronic commerce. Key words finite automaton - electronic commerce - nonrepudiation - information security CLC number TP 393. 08 Foundation item: Supported by the National Natural Science Foundation of China (66973034, 90104005, 60373087)Biography: Xie Xiao-yao (1952-), male, Professor, Ph. D candidate, research direction: information security.展开更多
Due to the insufficiency of utilizing knowledge to guide the complex optimal searching, existing genetic algorithms fail to effectively solve excavator boom structural optimization problem. To improve the optimization...Due to the insufficiency of utilizing knowledge to guide the complex optimal searching, existing genetic algorithms fail to effectively solve excavator boom structural optimization problem. To improve the optimization efficiency and quality, a new knowledge-based real-coded genetic algorithm is proposed. A dual evolution mechanism combining knowledge evolution with genetic algorithm is established to extract, handle and utilize the shallow and deep implicit constraint knowledge to guide the optimal searching of genetic algorithm circularly. Based on this dual evolution mechanism, knowledge evolution and population evolution can be connected by knowledge influence operators to improve the conflgurability of knowledge and genetic operators. Then, the new knowledge-based selection operator, crossover operator and mutation operator are proposed to integrate the optimal process knowledge and domain culture to guide the excavator boom structural optimization. Eight kinds of testing algorithms, which include different genetic operators, arc taken as examples to solve the structural optimization of a medium-sized excavator boom. By comparing the results of optimization, it is shown that the algorithm including all the new knowledge-based genetic operators can more remarkably improve the evolutionary rate and searching ability than other testing algorithms, which demonstrates the effectiveness of knowledge for guiding optimal searching. The proposed knowledge-based genetic algorithm by combining multi-level knowledge evolution with numerical optimization provides a new effective method for solving the complex engineering optimization problem.展开更多
Knowledge-Based Engineering （KBE） is introduced into the ship structural design in this paper. From the implementation of KBE, the design solutions for both Rules Design Method （RDM） and Interpolation Design Meth...Knowledge-Based Engineering （KBE） is introduced into the ship structural design in this paper. From the implementation of KBE, the design solutions for both Rules Design Method （RDM） and Interpolation Design Method （IDM） are generated. The corresponding Finite Element （FE） models are generated. Topological design of the longitudinal structures is studied where the Gaussian Process （GP） is employed to build the surrogate model for FE analysis. Multi-objective optimization methods inspired by Pareto Front are used to reduce the design tank weight and outer surface area simultaneously. Additionally, an enhanced Level Set Method （LSM） which employs implicit algorithm is applied to the topological design of typical bracket plate which is used extensively in ship structures. Two different sets of boundary conditions are considered. The proposed methods show satisfactory efficiency and accuracy.展开更多
文摘On January 11,2025,the 2025 Bejing Roundtable Meeting for International Exhibition Organisations was held in Beijing.The event was co-hosted by the CCPIT Bejing,the Bejing Municipal Commerce Bureau,the Shunyi District People's Government and the Beijing Chamber of International Commerce.
文摘In January 2025,the Beijing Chamber of Commerce(Singapore)was officially established.Coinciding with the 35th anniversary of China-Singapore diplomatic relations and the 60th anniversary of Singapore’s independence,its founding is part of a timely response to the growing needs of businesses and communities from both Beijing and Singapore to deepen mutual understanding and expand cooperation.As a Chinese person who has lived and worked in Singapore for many years,Feng Jianli,president of the Beijing Chamber of Commerce(Singapore),knows first-hand just how challenging it can be for new immigrants from Beijing to adapt to identity transitions and access local support.The chamber was founded not only to help them take root and thrive,but also to serve as a platform for deeper people-to-people exchange between Singapore and Beijing.
基金supported by the National Natural Science Foundation of China(Grant No.41961134032).
文摘The surrogate model serves as an efficient simulation tool during the slope parameter inversion process.However,the creep constitutive model integrated with dynamic damage evolution poses challenges in development of the required surrogate model.In this study,a novel physics knowledge-based surrogate model framework is proposed.In this framework,a Transformer module is employed to capture straindriven softening-hardening physical mechanisms.Positional encoding and self-attention are utilized to transform the constitutive parameters associated with shear strain,which are not directly time-related,into intermediate latent features for physical loss calculation.Next,a multi-layer stacked GRU(gated recurrent unit)network is built to provide input interfaces for time-dependent intermediate latent features,hydraulic boundary conditions,and water-rock interaction degradation equations,with static parameters introduced via external fully-connected layers.Finally,a combined loss function is constructed to facilitate the collaborative training of physical and data loss,introducing time-dependent weight adjustments to focus the surrogate model on accurate deformation predictions during critical phases.Based on the deformation of a reservoir bank landslide triggered by impoundment and subsequent restabilization,an elasto-viscoplastic constitutive model that considers water effect and sliding state dependencies is developed to validate the proposed surrogate model framework.The results indicate that the framework exhibits good performance in capturing physical mechanisms and predicting creep behavior,reducing errors by about 30 times compared to baseline models such as GRU and LSTM(long short-term memory),meeting the precision requirements for parameter inversion.Ablation experiments also confirmed the effectiveness of the framework.This framework can also serve as a reference for constructing other creep surrogate models that involve non-time-related across dimensions.
文摘On May 14th,following the U.S.adjustment of additional tariffs on Chinese goods,American buyers began stockpiling in earnest.Many cross-border e-commerce companies also received a surge of orders.At 7 PM,a bustling Hangzhou-based cross-border e-commerce company was alive with multiple languages echoing through its live-streaming rooms as backend order numbers climbed steadily.
基金2025 Haikou Philosophy and Social Science Planning Project,Research on the Construction Path of Consumption Scenarios in Haikou International Tourism and Consumption Center City under the Perspective of Scene Theory(Project No.:2025-YBKT-10)。
文摘In the context of the Hainan Free Trade Port,Haikou is committed to becoming an international consumer city,with the integration of culture,commerce,tourism,and sports as a key strategy.This article provides an in-depth analysis of Haikou’s current status in building an international consumer city through the integration of culture,commerce,tourism,and sports,including its strengths and existing challenges.It explores the significance of this integration for Haikou and proposes targeted development strategies.These strategies aim to enhance the city’s appeal and international competitiveness by integrating resources,innovating business models,and optimizing the environment,thereby promoting the deep integration of culture,commerce,tourism,and sports in Haikou.
文摘As African economies continue to expand their trade networks,digital transformation and e-commerce have emerged as key drivers of economic development.Ethiopia has embraced this trend,aiming to modernise its logistics and aviation infrastructure to meet the growing demand.
文摘In order to analyze the effects of different cooperative mechanisms between a mobile device manufacturer and a mobile network operator （ MNO ）, a Stackelberg structure is constructed. The manufacturer acts as a leader, while the MNO acts as a follower, i. e., a traditional retailer. Three cooperative mechanisms are considered： the manufacturer does not invest in developing the propriety function and software to support the infrastructure capacity of the MNO; the manufacturer invests in the development; the MNO offers a subsidy to encourage the manufacturer to invest in development. The results reveal that investing in the development can increase the profits of both the manufacturer and the MNO. Furthermore, if the MNO shares certain investment costs with the manufacturer, the MNO may charge higher prices of mobile connection services and mobile value-added services, and the profits of the two players may be enhanced.
文摘Carries on when the international commerce English translation must the special attention cultural difference, probably finds one in the foreign culture and our country culture to suit the spot. Is engaged in the international commerce the translation personnel must understand that grasps our country and the foreign land national culture difference, and tries to cause these differences to translate in the process to vanish, simultaneously in translated into the language to find the accurate words and expressions, caused the foreign land culture to translate into the language to reappear. The language is a cultural part, is also the cultural carrier, it is playing the vital role to the culture. Language border translator is not only two language mutual exchanges, is also two cultural transmissions.
基金Supported by Rural Development Research Center of Sichuan Province
文摘The problems existing in the development of agriculture-related enterprises in earthquake area are evaluated,as well as the prominent issues existing in the process of developing E-commerce,consequently,the corresponding strategies for developing E-commerce in agriculture-related enterprises are proposed.
基金Project supported by the National Natural Science Foundation of China(Nos.40101014 and 40001008).
文摘A machine-learning approach was developed for automated building of knowledgebases for soil resources mapping by using a classification tree to generate knowledge from trainingdata. With this method, building a knowledge base for automated soil mapping was easier than usingthe conventional knowledge acquisition approach. The knowledge base built by classification tree wasused by the knowledge classifier to perform the soil type classification of Longyou County,Zhejiang Province, China using Landsat TM bi-temporal images and CIS data. To evaluate theperformance of the resultant knowledge bases, the classification results were compared to existingsoil map based on a field survey. The accuracy assessment and analysis of the resultant soil mapssuggested that the knowledge bases built by the machine-learning method was of good quality formapping distribution model of soil classes over the study area.
文摘The accountability of electronic commerce protocols is an important aspect to insures security of electronic transaction. This paper proposes to use Finite Automaton (FA) model as a new kind of framework to analyze the transaction protocols in the application of electronic commerce. Key words finite automaton - electronic commerce - nonrepudiation - information security CLC number TP 393. 08 Foundation item: Supported by the National Natural Science Foundation of China (66973034, 90104005, 60373087)Biography: Xie Xiao-yao (1952-), male, Professor, Ph. D candidate, research direction: information security.
基金supported by National Natural Science Foundation of China(Grant No.51175086)
文摘Due to the insufficiency of utilizing knowledge to guide the complex optimal searching, existing genetic algorithms fail to effectively solve excavator boom structural optimization problem. To improve the optimization efficiency and quality, a new knowledge-based real-coded genetic algorithm is proposed. A dual evolution mechanism combining knowledge evolution with genetic algorithm is established to extract, handle and utilize the shallow and deep implicit constraint knowledge to guide the optimal searching of genetic algorithm circularly. Based on this dual evolution mechanism, knowledge evolution and population evolution can be connected by knowledge influence operators to improve the conflgurability of knowledge and genetic operators. Then, the new knowledge-based selection operator, crossover operator and mutation operator are proposed to integrate the optimal process knowledge and domain culture to guide the excavator boom structural optimization. Eight kinds of testing algorithms, which include different genetic operators, arc taken as examples to solve the structural optimization of a medium-sized excavator boom. By comparing the results of optimization, it is shown that the algorithm including all the new knowledge-based genetic operators can more remarkably improve the evolutionary rate and searching ability than other testing algorithms, which demonstrates the effectiveness of knowledge for guiding optimal searching. The proposed knowledge-based genetic algorithm by combining multi-level knowledge evolution with numerical optimization provides a new effective method for solving the complex engineering optimization problem.
基金financially supported by the Project of Ministry of Education and Finance of China(Grant Nos.200512 and 201335)the Project of the State Key Laboratory of Ocean Engineering,Shanghai Jiao Tong University(Grant No.GKZD010053-10)
文摘Knowledge-Based Engineering （KBE） is introduced into the ship structural design in this paper. From the implementation of KBE, the design solutions for both Rules Design Method （RDM） and Interpolation Design Method （IDM） are generated. The corresponding Finite Element （FE） models are generated. Topological design of the longitudinal structures is studied where the Gaussian Process （GP） is employed to build the surrogate model for FE analysis. Multi-objective optimization methods inspired by Pareto Front are used to reduce the design tank weight and outer surface area simultaneously. Additionally, an enhanced Level Set Method （LSM） which employs implicit algorithm is applied to the topological design of typical bracket plate which is used extensively in ship structures. Two different sets of boundary conditions are considered. The proposed methods show satisfactory efficiency and accuracy.
