The United States has adopted a retrenchment strategy on national security issues since the Obama administration,attempting to reduce its power projection in Europe and the Middle East and shift its strategic priority...The United States has adopted a retrenchment strategy on national security issues since the Obama administration,attempting to reduce its power projection in Europe and the Middle East and shift its strategic priority to Asia-Pacific.However,this subjective strategic design has brought an imbalance to the United States'global strategy,leading to the outbreak of the Ukraine crisis and the Gaza conflict.The United States had to withdraw some strategic and diplomatic resources to Europe and the Middle East.As a result,US national security strategy has objectively achieved a global rebalance,which not only reflects the balance mechanism of power flow and strategic resource allocation among major countries but also demonstrates the strategic consequences of America's relative gains thought.Due to the limited strategic and diplomatic resources,the United States will find it difficult to balance the three regions of Europe,the Middle East,and the“Indo-Pacific.”Currently,the Ukraine crisis and the Gaza conflict are facing the risk of escalation,and the US national security strategy is at a crossroads,with the historical peak of its pivot to Asia-Pacific possibly already over.展开更多
With rapid progress in the global green transition over recent years,the sustained and stable supply of critical minerals essential for the green transition has garnered increased attention.As the largest country by l...With rapid progress in the global green transition over recent years,the sustained and stable supply of critical minerals essential for the green transition has garnered increased attention.As the largest country by landmass,Russia has a wealth of natural resources,particularly fossil fuels and critical minerals.In the current context of major-country rivalries,geopolitical conf licts,Western sanctions,and the green transition,Russia hopes to reduce excessive dependency on the oil and gas industry and diversify its sources of revenue.More importantly,it intends to use critical minerals as a new strategic tool for a long-term confrontation with the West and effectively ensure its national security and development interests.Towards this end,Russia has formulated strategic plans,encouraged import substitution,increased policy support,promoted geological study and exploration,and accelerated Arctic development.However,Russia faces many constraints in critical mineral development.Whether Russia can consolidate its status as a resource power in the future depends not only on the intensity,depth,and breadth of Western sanctions but also on its ability to break through the Western blockade,sustain the import of necessary equipment and technologies,develop alternative technologies,and gradually transform itself to adapt to the new circumstances.展开更多
With the deepening development of European integration and the change of international situation, member states of the European Union(EU) have gradually strengthened consultation and coordination in the field of secur...With the deepening development of European integration and the change of international situation, member states of the European Union(EU) have gradually strengthened consultation and coordination in the field of security and established corresponding mechanisms. In this process,the EU has also formed and developed its National Security Strategy and issued four versions of security strategy reports in 2003, 2008, 2016, and 2022. The 2022 version of the EU security strategy(hereafter referred to as the New Security Strategy), for the first time, has identified Russia as a long-term and direct threat. Furthermore, it has paid increased attention to traditional security, especially the upgrading of military capabilities and has become more reliant on the United States and the North Atlantic Treaty Organization. In the future, the EU will accelerate the militarization process, exert all-out efforts to contain Russia, scrutinize neighborhood security, and increase its swing on China policy.展开更多
In July 2021,Russia unveiled its new National Security Strategy,which is a considerably updated version compared with the previous one and hence presents several new features.For instance,it further stresses that secu...In July 2021,Russia unveiled its new National Security Strategy,which is a considerably updated version compared with the previous one and hence presents several new features.For instance,it further stresses that security should be prioritized over other aspects;it gives more attention to the chaotic aspects of order change in its assessment of the international situation;it highlights the threats from the West;and it places increased emphasis on domestic capacity building as a means for safeguarding national security.From the content of the new Strategy as well as Russia’s policies in recent years,the strategy of Russia for the foreseeable future can be generally characterized as inward-looking.Domestically,its policies will become more conservative;diplomatically,it will take up a defensive position;and economically,it will increasingly emphasize security and selfreliance.In other words,several issues that were previously overlooked will be given attention.However,strategic introversion does not mean that Russia will invest all its energy in defense.Instead,Russia will build up strength for changes that lie ahead.With the expected strategic introversion,Russia will fnd difculty in making breakthroughs in terms of its relations with the West;the China-Russia relations will continue on the path of steady development;and Russia will place greater importance to the balance of power among major countries.展开更多
India has upheld extremely rich practices of national security since its founding as a republic because of its unique geo-environmental features, historical legacies, and traditional cultures, which reflect a type of ...India has upheld extremely rich practices of national security since its founding as a republic because of its unique geo-environmental features, historical legacies, and traditional cultures, which reflect a type of national security strategy that has distinct Indian characteristics. Generally, successive governments in India have followed the basic principles articulated in Kautilya’s Arthasastra and various security practices adopted during the British Raj. India’s national security strategies are based on an internal logic of geopolitical rivalry and changes in international scenarios, and they are strongly influenced by Hindu traditions and the “Sad-Dharma” purported by King Ashoka. The objective is to create an India-dominated security order in the South Asian subcontinent, which persistently builds its capacity and system as a “net security provider” in the Indian Ocean Rim. Moreover, India is vigorously expanding its network of influence in the Pacific region in an effort to become a world leading power that enjoys a high level of strategic autonomy.展开更多
The US Asia-Pacific strategy is witnessing and will continue to witness new developments along with the evolution of its domestic politics as well as of the regional situation in Asia Pacific,particularly with Republi...The US Asia-Pacific strategy is witnessing and will continue to witness new developments along with the evolution of its domestic politics as well as of the regional situation in Asia Pacific,particularly with Republican candidate Donald展开更多
The rise of electronic commerce has broken the traditional trading mode, changed people＇ s production and life, has gradually become an important factor of regional economic development. The paper comprehensively dis...The rise of electronic commerce has broken the traditional trading mode, changed people＇ s production and life, has gradually become an important factor of regional economic development. The paper comprehensively discuss on present situation and characteristics of electronic commerce development in our country, on basis of it, the paper analyze electronic commerce major impact on regional economic development, and put forward to strengthen the development of e-commerce related strategies to promote regional economic development role.展开更多
Rapid growth of China’s overall national strength after the end of the ColdWar has attracted worldwide attention. As a consequence, political scien-tists of various countries begin to ponder over a question: whether ...Rapid growth of China’s overall national strength after the end of the ColdWar has attracted worldwide attention. As a consequence, political scien-tists of various countries begin to ponder over a question: whether will Chi-na seek external expansion when it becomes powerful? In 1992, there began to ap-pear a myth of so-called "China threat". In its November 28 issue of that year,展开更多
Small-drone technology has opened a range of new applications for aerial transportation. These drones leverage the Internet of Things (IoT) to offer cross-location services for navigation. However, they are susceptibl...Small-drone technology has opened a range of new applications for aerial transportation. These drones leverage the Internet of Things (IoT) to offer cross-location services for navigation. However, they are susceptible to security and privacy threats due to hardware and architectural issues. Although small drones hold promise for expansion in both civil and defense sectors, they have safety, security, and privacy threats. Addressing these challenges is crucial to maintaining the security and uninterrupted operations of these drones. In this regard, this study investigates security, and preservation concerning both the drones and Internet of Drones (IoD), emphasizing the significance of creating drone networks that are secure and can robustly withstand interceptions and intrusions. The proposed framework incorporates a weighted voting ensemble model comprising three convolutional neural network (CNN) models to enhance intrusion detection within the network. The employed CNNs are customized 1D models optimized to obtain better performance. The output from these CNNs is voted using a weighted criterion using a 0.4, 0.3, and 0.3 ratio for three CNNs, respectively. Experiments involve using multiple benchmark datasets, achieving an impressive accuracy of up to 99.89% on drone data. The proposed model shows promising results concerning precision, recall, and F1 as indicated by their obtained values of 99.92%, 99.98%, and 99.97%, respectively. Furthermore, cross-validation and performance comparison with existing works is also carried out. Findings indicate that the proposed approach offers a prospective solution for detecting security threats for aerial systems and satellite systems with high accuracy.展开更多
The year 2024 marks the tenth anniversary of General Secretary Xi Jinping’s proposal for a new energy security strategy and the start of the second decade of the Belt and Road Initiative.During this year,the internat...The year 2024 marks the tenth anniversary of General Secretary Xi Jinping’s proposal for a new energy security strategy and the start of the second decade of the Belt and Road Initiative.During this year,the international situation grew increasingly complex,with intensifying rivalries among major powers and sporadic occurrences of geopolitical conflicts and localized disturbances.CNPC’s international operations focus on maintaining stability while making progress,successfully overcoming various intertwined risks and achieving new milestones in international business development.For six consecutive years,the overseas equity production has maintained an equivalent of 100 million tons.International trade has achieved stable progress,and engineering services have made new breakthroughs in market expansion,contributing new momentum to CNPC’s establishment as a world-class enterprise.展开更多
The year 2024 marks the tenth anniversary of China’s comprehensive implementation of the new energy security strategy,“Four Revolutions,One Cooperation.”Over the past decade,China has experienced a series of signif...The year 2024 marks the tenth anniversary of China’s comprehensive implementation of the new energy security strategy,“Four Revolutions,One Cooperation.”Over the past decade,China has experienced a series of significant changes in its energy sector,promoting comprehensive reforms in energy consumption patterns and consistently pursuing a cleaner,low-carbon energy structure.The country has accelerated the development of a diverse and clean energy supply system,creating a multifaceted supply network driven by coal,oil,gas,nuclear,and renewable energy sources,and continuously enhancing its energy supply capacity.By leveraging technological innovation as the primary driving force,China has thoroughly deepened energy system reforms to unleash market vitality and has strengthened international cooperation in the energy sector across all dimensions.The construction of a strong energy nation has further advanced,with significantly enhanced security assurance capabilities,effectively supporting and serving the healthy development of the economy and society.To accelerate the development of a new energy system,relevant national departments have introduced a series of industry policies and reform proposals in the energy sector.These initiatives aim to strongly support high-quality energy development by strengthening energy supply security,promoting a green and low-carbon energy transition,enhancing energy utilization efficiency,and improving energy market mechanisms and regulation.展开更多
As is known,centralized federated learning faces risks of a single point of failure and privacy breaches,and blockchain-based federated learning frameworks can address these challenges to a certain extent in recent wo...As is known,centralized federated learning faces risks of a single point of failure and privacy breaches,and blockchain-based federated learning frameworks can address these challenges to a certain extent in recent works.However,malicious clients may still illegally access the blockchain to upload malicious data or steal on-chain data.In addition,blockchain-based federated training suffers from a heavy storage burden and excessive network communication overhead.To address these issues,we propose an asynchronous,tiered federated learning storage scheme based on blockchain and IPFS.It manages the execution of federated learning tasks through smart contracts deployed on the blockchain,decentralizing the entire training process.Additionally,the scheme employs a secure and efficient blockchain-based asynchronous tiered architecture,integrating attribute-based access control technology for resource exchange between the clients and the blockchain network.It dynamically manages access control policies during training and adopts a hybrid data storage strategy combining blockchain and IPFS.Experiments with multiple sets of image classification tasks are conducted,indicating that the storage strategy used in this scheme saves nearly 50 percent of the communication overhead and significantly reduces the on-chain storage burden compared to the traditional blockchain-only storage strategy.In terms of training effectiveness,it maintains similar accuracy as centralized training and minimizes the probability of being attacked.展开更多
To solve security problems in cross-technology communication(CTC),we take the Internet of Things(IoT)control system as an example,and propose a comprehensive solution against the attack on the physical layer CTC from ...To solve security problems in cross-technology communication(CTC),we take the Internet of Things(IoT)control system as an example,and propose a comprehensive solution against the attack on the physical layer CTC from ZigBee to Wi-Fi.Specifically,we propose a noise interference strategy by adding an appropriate amount of dedicated noise signals,which can interfere with the eavesdropping and simulation of ZigBee signals without affecting the reception of the receiver.Moreover,we also propose a regression modeling strategy which collects data,extracts features,and trains a binary logistic regression model so that the receiver can actively distinguish simulated attack signals.We build the experimental platform by using GNU Radio and USRP devices.Experimental results demonstrate that the security defense strategies can identify and distinguish the signals from the attacker with a high accuracy,effectively solving the signal emulation attack on the physical layer CTC from ZigBee to Wi-Fi.展开更多
The system of State Foodstuff Security is a comprehensively systematical framework, which needs concerted support and energetic cooperation from all walks of lives. This paper analyzes the strategies for State Foodstu...The system of State Foodstuff Security is a comprehensively systematical framework, which needs concerted support and energetic cooperation from all walks of lives. This paper analyzes the strategies for State Foodstuff Security： integrating new biological techniques with traditional methods, full utilization of soil with its protection, policies leading with market regulation, steady high yield with promoting additional value through further processing, general foodstuff production with substitute food seeking, domestic self-supply with international trade complementarities as well as short-term exploiting with long-term development on the basis of the increase of general foodstuff production capability.展开更多
Wireless charging has played a crucial role in electric vehicle charging market presently.As electric vehicles will be important nodes access to the smart grid in the future,the security flow of energy and information...Wireless charging has played a crucial role in electric vehicle charging market presently.As electric vehicles will be important nodes access to the smart grid in the future,the security flow of energy and information between wireless charging infrastructure and the smart grid will directly affect the security of the smart grid.A novel secure wireless transfer method for energy and information transfer simultaneously has been represented in this paper by designing a reasonable dual-band coil for simultaneous transmission of energy and information,using improved chaotic modulation and a three times handshake protocol for encrypting energy and information between wireless charging infrastructure and the smart grid.Both the simulation and experiments show that the security of energy transmission can be effectively improved by this structure,in the premise of ensuring the power and efficiency of wireless energy transmission.展开更多
As a southwestern border province of China,Yunnan is featured by the geographical advantage of proximity to the Indo-China Peninsula which is known as World Rice Warehouse,and its capital and technology are ahead of t...As a southwestern border province of China,Yunnan is featured by the geographical advantage of proximity to the Indo-China Peninsula which is known as World Rice Warehouse,and its capital and technology are ahead of the neighboring countries of China.Therefore,to enhance its support capability in consolidating and improving the national food security strategy,Yunnan should further develop its comparative advantages by building the regional food industry chain and supply chain depending on the province's grain system of production,processing,storage and transportation,as well as its agricultural economic and trade cooperation platforms and channels with the neighboring countries of China.In this study,comparative analysis and related methods were used to systematically analyze the scale of grain production in Yunnan,the proportion of its grain production to the national total amount,the transition of its grain variety structure and the characteristics of its food security system,as well as the grain export trade of the 6 countries in the Indo-China Peninsula from 2010 to 2019.Then,the problems in grain production in Yunnan were clarified,such as the decrease of grain ration production capacity,the decline of comparative benefits of grain production and the insufficient support for agricultural"going global"strategy.Finally,a series of countermeasures were put forward,including further implementing the strategy of"reserving grain in land and technology"to increase Yunnan's production capacity of grain,focusing on agricultural products storage and transportation system to improve the ability to obtain grain from abroad,expanding the border processing and logistics industry,optimizing the policy of agricultural products'import and export,and etc.展开更多
General Secretary of the Communist Party of China(CPC)Central Committee Xi Jinping has creatively put forward a holistic approach to national security and the path of national security with Chinese characteristics,whi...General Secretary of the Communist Party of China(CPC)Central Committee Xi Jinping has creatively put forward a holistic approach to national security and the path of national security with Chinese characteristics,which are synergistic and inseparable.Compared with other major global powers,China is embarking on a path of national security that incorporates distinctive Chinese characteristics.Unlike the United States,which seeks international expansion and hegemony while pursuing national security,China is dedicated to maintaining global security and building a community with a shared future for humanity.Unlike Russia,which prioritizes national security over everything else,China places greater emphasis on balancing development and security.Unlike Europe and Japan,which entrust their national security to other countries,China has always adhered to the principle of independence and self-reliance.An essential feature of the path of national security with Chinese characteristics is that it upholds the unity of the people’s security,political security,and the supremacy of national interests.Moreover,China will remain committed to peaceful development while defending its interests.China will continue to balance development and security imperatives,maintaining an independent foreign policy while building a community with a shared future for humanity.To make solid strides on the path of national security with Chinese characteristics,the fundamental task will be pursuing a holistic approach to national security and implementing the Ten Upholds.展开更多
Against the backdrop of the accelerating changes unseen in a century and the intensifying major-country competition,the European Union(EU) has significantly modified its economic security concepts,as illustrated by th...Against the backdrop of the accelerating changes unseen in a century and the intensifying major-country competition,the European Union(EU) has significantly modified its economic security concepts,as illustrated by the release of its first-ever strategy on economic security in 2023,which will continue to be advanced in 2024.This article discusses the possible pathways for the EU to implement its economic security strategy in the context of “de-risking” by taking stock of the evolution of EU economic security concepts and its relevant policy documents and foreign economic policies and practices in recent years.Finally,this article will analyze some of the negative impacts of the latest EU policy on the global economy and trade,as well as on European economic prospects.展开更多
The last two years have attracted the world＇s attention to Russia. The annexation of Crimea, the hybrid war in Eastern Ukraine, and finally the unexpected interference in Syria--all these actions bring us back to the...The last two years have attracted the world＇s attention to Russia. The annexation of Crimea, the hybrid war in Eastern Ukraine, and finally the unexpected interference in Syria--all these actions bring us back to the question of understanding the Russian motivation properly. Generally, it includes the whole interpretation of Russian strategic culture which is based on the research and analysis of the different factors： from literature and history to religion and political nature of the Russian state. Significant attempts to understand Moscow＇s strategic culture were made by the American experts during the Cold War; therefore the article analyzes the main pillars of Russian strategic culture, its continuity and change in comparison to Soviet times as well as the main reactions of Moscow for what it considers to be a threat.展开更多
文摘The United States has adopted a retrenchment strategy on national security issues since the Obama administration,attempting to reduce its power projection in Europe and the Middle East and shift its strategic priority to Asia-Pacific.However,this subjective strategic design has brought an imbalance to the United States'global strategy,leading to the outbreak of the Ukraine crisis and the Gaza conflict.The United States had to withdraw some strategic and diplomatic resources to Europe and the Middle East.As a result,US national security strategy has objectively achieved a global rebalance,which not only reflects the balance mechanism of power flow and strategic resource allocation among major countries but also demonstrates the strategic consequences of America's relative gains thought.Due to the limited strategic and diplomatic resources,the United States will find it difficult to balance the three regions of Europe,the Middle East,and the“Indo-Pacific.”Currently,the Ukraine crisis and the Gaza conflict are facing the risk of escalation,and the US national security strategy is at a crossroads,with the historical peak of its pivot to Asia-Pacific possibly already over.
文摘With rapid progress in the global green transition over recent years,the sustained and stable supply of critical minerals essential for the green transition has garnered increased attention.As the largest country by landmass,Russia has a wealth of natural resources,particularly fossil fuels and critical minerals.In the current context of major-country rivalries,geopolitical conf licts,Western sanctions,and the green transition,Russia hopes to reduce excessive dependency on the oil and gas industry and diversify its sources of revenue.More importantly,it intends to use critical minerals as a new strategic tool for a long-term confrontation with the West and effectively ensure its national security and development interests.Towards this end,Russia has formulated strategic plans,encouraged import substitution,increased policy support,promoted geological study and exploration,and accelerated Arctic development.However,Russia faces many constraints in critical mineral development.Whether Russia can consolidate its status as a resource power in the future depends not only on the intensity,depth,and breadth of Western sanctions but also on its ability to break through the Western blockade,sustain the import of necessary equipment and technologies,develop alternative technologies,and gradually transform itself to adapt to the new circumstances.
文摘With the deepening development of European integration and the change of international situation, member states of the European Union(EU) have gradually strengthened consultation and coordination in the field of security and established corresponding mechanisms. In this process,the EU has also formed and developed its National Security Strategy and issued four versions of security strategy reports in 2003, 2008, 2016, and 2022. The 2022 version of the EU security strategy(hereafter referred to as the New Security Strategy), for the first time, has identified Russia as a long-term and direct threat. Furthermore, it has paid increased attention to traditional security, especially the upgrading of military capabilities and has become more reliant on the United States and the North Atlantic Treaty Organization. In the future, the EU will accelerate the militarization process, exert all-out efforts to contain Russia, scrutinize neighborhood security, and increase its swing on China policy.
文摘In July 2021,Russia unveiled its new National Security Strategy,which is a considerably updated version compared with the previous one and hence presents several new features.For instance,it further stresses that security should be prioritized over other aspects;it gives more attention to the chaotic aspects of order change in its assessment of the international situation;it highlights the threats from the West;and it places increased emphasis on domestic capacity building as a means for safeguarding national security.From the content of the new Strategy as well as Russia’s policies in recent years,the strategy of Russia for the foreseeable future can be generally characterized as inward-looking.Domestically,its policies will become more conservative;diplomatically,it will take up a defensive position;and economically,it will increasingly emphasize security and selfreliance.In other words,several issues that were previously overlooked will be given attention.However,strategic introversion does not mean that Russia will invest all its energy in defense.Instead,Russia will build up strength for changes that lie ahead.With the expected strategic introversion,Russia will fnd difculty in making breakthroughs in terms of its relations with the West;the China-Russia relations will continue on the path of steady development;and Russia will place greater importance to the balance of power among major countries.
文摘India has upheld extremely rich practices of national security since its founding as a republic because of its unique geo-environmental features, historical legacies, and traditional cultures, which reflect a type of national security strategy that has distinct Indian characteristics. Generally, successive governments in India have followed the basic principles articulated in Kautilya’s Arthasastra and various security practices adopted during the British Raj. India’s national security strategies are based on an internal logic of geopolitical rivalry and changes in international scenarios, and they are strongly influenced by Hindu traditions and the “Sad-Dharma” purported by King Ashoka. The objective is to create an India-dominated security order in the South Asian subcontinent, which persistently builds its capacity and system as a “net security provider” in the Indian Ocean Rim. Moreover, India is vigorously expanding its network of influence in the Pacific region in an effort to become a world leading power that enjoys a high level of strategic autonomy.
文摘The US Asia-Pacific strategy is witnessing and will continue to witness new developments along with the evolution of its domestic politics as well as of the regional situation in Asia Pacific,particularly with Republican candidate Donald
文摘The rise of electronic commerce has broken the traditional trading mode, changed people＇ s production and life, has gradually become an important factor of regional economic development. The paper comprehensively discuss on present situation and characteristics of electronic commerce development in our country, on basis of it, the paper analyze electronic commerce major impact on regional economic development, and put forward to strengthen the development of e-commerce related strategies to promote regional economic development role.
文摘Rapid growth of China’s overall national strength after the end of the ColdWar has attracted worldwide attention. As a consequence, political scien-tists of various countries begin to ponder over a question: whether will Chi-na seek external expansion when it becomes powerful? In 1992, there began to ap-pear a myth of so-called "China threat". In its November 28 issue of that year,
文摘Small-drone technology has opened a range of new applications for aerial transportation. These drones leverage the Internet of Things (IoT) to offer cross-location services for navigation. However, they are susceptible to security and privacy threats due to hardware and architectural issues. Although small drones hold promise for expansion in both civil and defense sectors, they have safety, security, and privacy threats. Addressing these challenges is crucial to maintaining the security and uninterrupted operations of these drones. In this regard, this study investigates security, and preservation concerning both the drones and Internet of Drones (IoD), emphasizing the significance of creating drone networks that are secure and can robustly withstand interceptions and intrusions. The proposed framework incorporates a weighted voting ensemble model comprising three convolutional neural network (CNN) models to enhance intrusion detection within the network. The employed CNNs are customized 1D models optimized to obtain better performance. The output from these CNNs is voted using a weighted criterion using a 0.4, 0.3, and 0.3 ratio for three CNNs, respectively. Experiments involve using multiple benchmark datasets, achieving an impressive accuracy of up to 99.89% on drone data. The proposed model shows promising results concerning precision, recall, and F1 as indicated by their obtained values of 99.92%, 99.98%, and 99.97%, respectively. Furthermore, cross-validation and performance comparison with existing works is also carried out. Findings indicate that the proposed approach offers a prospective solution for detecting security threats for aerial systems and satellite systems with high accuracy.
文摘The year 2024 marks the tenth anniversary of General Secretary Xi Jinping’s proposal for a new energy security strategy and the start of the second decade of the Belt and Road Initiative.During this year,the international situation grew increasingly complex,with intensifying rivalries among major powers and sporadic occurrences of geopolitical conflicts and localized disturbances.CNPC’s international operations focus on maintaining stability while making progress,successfully overcoming various intertwined risks and achieving new milestones in international business development.For six consecutive years,the overseas equity production has maintained an equivalent of 100 million tons.International trade has achieved stable progress,and engineering services have made new breakthroughs in market expansion,contributing new momentum to CNPC’s establishment as a world-class enterprise.
文摘The year 2024 marks the tenth anniversary of China’s comprehensive implementation of the new energy security strategy,“Four Revolutions,One Cooperation.”Over the past decade,China has experienced a series of significant changes in its energy sector,promoting comprehensive reforms in energy consumption patterns and consistently pursuing a cleaner,low-carbon energy structure.The country has accelerated the development of a diverse and clean energy supply system,creating a multifaceted supply network driven by coal,oil,gas,nuclear,and renewable energy sources,and continuously enhancing its energy supply capacity.By leveraging technological innovation as the primary driving force,China has thoroughly deepened energy system reforms to unleash market vitality and has strengthened international cooperation in the energy sector across all dimensions.The construction of a strong energy nation has further advanced,with significantly enhanced security assurance capabilities,effectively supporting and serving the healthy development of the economy and society.To accelerate the development of a new energy system,relevant national departments have introduced a series of industry policies and reform proposals in the energy sector.These initiatives aim to strongly support high-quality energy development by strengthening energy supply security,promoting a green and low-carbon energy transition,enhancing energy utilization efficiency,and improving energy market mechanisms and regulation.
基金supported by the National Natural Science Foundation of China(Grant No.52331012)the Natural Science Foundation of Shanghai Municipality(Grant No.21ZR1426500)the Program for Cultivation of Graduate Students’Top-notch Innovative Talents of Shanghai Maritime University(Grant No.2023YBR007).
文摘As is known,centralized federated learning faces risks of a single point of failure and privacy breaches,and blockchain-based federated learning frameworks can address these challenges to a certain extent in recent works.However,malicious clients may still illegally access the blockchain to upload malicious data or steal on-chain data.In addition,blockchain-based federated training suffers from a heavy storage burden and excessive network communication overhead.To address these issues,we propose an asynchronous,tiered federated learning storage scheme based on blockchain and IPFS.It manages the execution of federated learning tasks through smart contracts deployed on the blockchain,decentralizing the entire training process.Additionally,the scheme employs a secure and efficient blockchain-based asynchronous tiered architecture,integrating attribute-based access control technology for resource exchange between the clients and the blockchain network.It dynamically manages access control policies during training and adopts a hybrid data storage strategy combining blockchain and IPFS.Experiments with multiple sets of image classification tasks are conducted,indicating that the storage strategy used in this scheme saves nearly 50 percent of the communication overhead and significantly reduces the on-chain storage burden compared to the traditional blockchain-only storage strategy.In terms of training effectiveness,it maintains similar accuracy as centralized training and minimizes the probability of being attacked.
文摘To solve security problems in cross-technology communication(CTC),we take the Internet of Things(IoT)control system as an example,and propose a comprehensive solution against the attack on the physical layer CTC from ZigBee to Wi-Fi.Specifically,we propose a noise interference strategy by adding an appropriate amount of dedicated noise signals,which can interfere with the eavesdropping and simulation of ZigBee signals without affecting the reception of the receiver.Moreover,we also propose a regression modeling strategy which collects data,extracts features,and trains a binary logistic regression model so that the receiver can actively distinguish simulated attack signals.We build the experimental platform by using GNU Radio and USRP devices.Experimental results demonstrate that the security defense strategies can identify and distinguish the signals from the attacker with a high accuracy,effectively solving the signal emulation attack on the physical layer CTC from ZigBee to Wi-Fi.
文摘The system of State Foodstuff Security is a comprehensively systematical framework, which needs concerted support and energetic cooperation from all walks of lives. This paper analyzes the strategies for State Foodstuff Security： integrating new biological techniques with traditional methods, full utilization of soil with its protection, policies leading with market regulation, steady high yield with promoting additional value through further processing, general foodstuff production with substitute food seeking, domestic self-supply with international trade complementarities as well as short-term exploiting with long-term development on the basis of the increase of general foodstuff production capability.
基金This work is supported by International Science&Technology Cooperation Program of China under contract No.2016YFE0102200.
文摘Wireless charging has played a crucial role in electric vehicle charging market presently.As electric vehicles will be important nodes access to the smart grid in the future,the security flow of energy and information between wireless charging infrastructure and the smart grid will directly affect the security of the smart grid.A novel secure wireless transfer method for energy and information transfer simultaneously has been represented in this paper by designing a reasonable dual-band coil for simultaneous transmission of energy and information,using improved chaotic modulation and a three times handshake protocol for encrypting energy and information between wireless charging infrastructure and the smart grid.Both the simulation and experiments show that the security of energy transmission can be effectively improved by this structure,in the premise of ensuring the power and efficiency of wireless energy transmission.
基金Supported by the Construction of Think Tank for Yunnan Agricultural Development and Policy Research on Science and Technology Management(202102AE090036-15)the Research Project of Yunnan Provincial Committee of Jiusan Society(YN93/2020018)the Talent Project for Yunling Scholars(YNWR-YLXZ-2019-013)。
文摘As a southwestern border province of China,Yunnan is featured by the geographical advantage of proximity to the Indo-China Peninsula which is known as World Rice Warehouse,and its capital and technology are ahead of the neighboring countries of China.Therefore,to enhance its support capability in consolidating and improving the national food security strategy,Yunnan should further develop its comparative advantages by building the regional food industry chain and supply chain depending on the province's grain system of production,processing,storage and transportation,as well as its agricultural economic and trade cooperation platforms and channels with the neighboring countries of China.In this study,comparative analysis and related methods were used to systematically analyze the scale of grain production in Yunnan,the proportion of its grain production to the national total amount,the transition of its grain variety structure and the characteristics of its food security system,as well as the grain export trade of the 6 countries in the Indo-China Peninsula from 2010 to 2019.Then,the problems in grain production in Yunnan were clarified,such as the decrease of grain ration production capacity,the decline of comparative benefits of grain production and the insufficient support for agricultural"going global"strategy.Finally,a series of countermeasures were put forward,including further implementing the strategy of"reserving grain in land and technology"to increase Yunnan's production capacity of grain,focusing on agricultural products storage and transportation system to improve the ability to obtain grain from abroad,expanding the border processing and logistics industry,optimizing the policy of agricultural products'import and export,and etc.
文摘General Secretary of the Communist Party of China(CPC)Central Committee Xi Jinping has creatively put forward a holistic approach to national security and the path of national security with Chinese characteristics,which are synergistic and inseparable.Compared with other major global powers,China is embarking on a path of national security that incorporates distinctive Chinese characteristics.Unlike the United States,which seeks international expansion and hegemony while pursuing national security,China is dedicated to maintaining global security and building a community with a shared future for humanity.Unlike Russia,which prioritizes national security over everything else,China places greater emphasis on balancing development and security.Unlike Europe and Japan,which entrust their national security to other countries,China has always adhered to the principle of independence and self-reliance.An essential feature of the path of national security with Chinese characteristics is that it upholds the unity of the people’s security,political security,and the supremacy of national interests.Moreover,China will remain committed to peaceful development while defending its interests.China will continue to balance development and security imperatives,maintaining an independent foreign policy while building a community with a shared future for humanity.To make solid strides on the path of national security with Chinese characteristics,the fundamental task will be pursuing a holistic approach to national security and implementing the Ten Upholds.
文摘Against the backdrop of the accelerating changes unseen in a century and the intensifying major-country competition,the European Union(EU) has significantly modified its economic security concepts,as illustrated by the release of its first-ever strategy on economic security in 2023,which will continue to be advanced in 2024.This article discusses the possible pathways for the EU to implement its economic security strategy in the context of “de-risking” by taking stock of the evolution of EU economic security concepts and its relevant policy documents and foreign economic policies and practices in recent years.Finally,this article will analyze some of the negative impacts of the latest EU policy on the global economy and trade,as well as on European economic prospects.
文摘The last two years have attracted the world＇s attention to Russia. The annexation of Crimea, the hybrid war in Eastern Ukraine, and finally the unexpected interference in Syria--all these actions bring us back to the question of understanding the Russian motivation properly. Generally, it includes the whole interpretation of Russian strategic culture which is based on the research and analysis of the different factors： from literature and history to religion and political nature of the Russian state. Significant attempts to understand Moscow＇s strategic culture were made by the American experts during the Cold War; therefore the article analyzes the main pillars of Russian strategic culture, its continuity and change in comparison to Soviet times as well as the main reactions of Moscow for what it considers to be a threat.
