Load-balance is an important issue in wireless sensor networks (WSNs), especially in WSNs with hierarchical structure. Energy consumed unevenly will bring the production of hot spots. Hot spot will cause WSNs to divid...Load-balance is an important issue in wireless sensor networks (WSNs), especially in WSNs with hierarchical structure. Energy consumed unevenly will bring the production of hot spots. Hot spot will cause WSNs to divide some unconnected sub-networks and shorten the lifetime of WSNs. To tackle this problem, a load-balance mechanism is proposed based on minority game (MG) with dormancy strategy. This mechanism can cause the rich behaviors of cooperation , prolong lifetime of WSNs, and keep energy consumed evenly. This dormancy mechanism can save energy of nodes by keeping in sleep temperately . Simulation results show that the proposed strategy can efficiently enhance the lifetime of cluster and the lifetime of whole WSNs.展开更多
To aware the topology of wireless sensor networks (WSN) with time-variety, and load-balance the resource of communication and energy, an opportunistic routing protocol for WSN based on Opportunistic Routing Entropy an...To aware the topology of wireless sensor networks (WSN) with time-variety, and load-balance the resource of communication and energy, an opportunistic routing protocol for WSN based on Opportunistic Routing Entropy and ant colony optimization, called ACO-TDOP, is proposed. At first, based on the second law of thermo-dynamics, we introduce the concept of Opportunistic Routing Entropy which is a parameter representing the transmission state of each node by taking into account the power left and the distance to the sink node. Then, it is proved that the problem of route thinking about Opportunistic Routing Entropy is shown to be NP-hard. So the protocol, ACO-TDOP, is proposed. At last, numerical results confirm that the ACO-TDOP is energy conservative and throughput gainful compared with other two existing routing protocols, and show that it is efficacious to analyze and uncover fundamental of message transmission with Opportunistic Routing in wireless network using the second law of thermodynamics.展开更多
Men struggle for human betterment for over thousands of years.In Mary Shelley’s Frankenstein,there are many heroes who struggle for human betterment,such as Frankenstein,the Modern Prometheus,Walton,and even the mons...Men struggle for human betterment for over thousands of years.In Mary Shelley’s Frankenstein,there are many heroes who struggle for human betterment,such as Frankenstein,the Modern Prometheus,Walton,and even the monster,etc.The better we live today the higher aims we want to reach in the future.In this Gothic novel,Mary Shelley shows her idea of the creation of life and the consequence of it.Some of her descriptions reflect her opinion.展开更多
Can progesterone be a better alternative to dexamethasone for use in routine brain surgery？ Surgical brain injury （SBI） is a form of brain trauma caused by various forms of neurosurgical interventions including bra...Can progesterone be a better alternative to dexamethasone for use in routine brain surgery？ Surgical brain injury （SBI） is a form of brain trauma caused by various forms of neurosurgical interventions including brain tumor excision, evacuation of intracere- bral hemorrhage and brain lobectomv （e.g., in epililepsv surger）.展开更多
The low stress abrasion behaviours of heat treated mild, medium carbon and high C - low Cr steels, which are generally used in making farm implements, have been investigated. The simple heat treatment greatly improves...The low stress abrasion behaviours of heat treated mild, medium carbon and high C - low Cr steels, which are generally used in making farm implements, have been investigated. The simple heat treatment greatly improves the hardness, tensile strength and abrasion resistance of medium carbon and high C - low Cr steels. The results indicate that the material removal during abrasion is controlled by a number of factors, such as hardness, chemical composition, microstructure and heat treatment conditions. The conclusion is that the heat treated high C - low Cr steel and mild steel carburized by using coaltar pitch provide the best hardness and abrasion resistance and thus appear to be the most suitable materials for making agricultural tools.展开更多
In this paper, a better admissible class B＋ is introduced and a new fixed point theorem for better admissible multimap is proved on abstract convex spaces. As a consequence, we deduce a new fixed point theorem on abs...In this paper, a better admissible class B＋ is introduced and a new fixed point theorem for better admissible multimap is proved on abstract convex spaces. As a consequence, we deduce a new fixed point theorem on abstract convex Ф-spaces. Our main results generalize some recent work due to Lassonde, Kakutani, Browder, and Park展开更多
Since the advent of liver resection as a treatment option for benign and malignant liver diseases, liver resections have continued to become safer with most centers reporting low morbidity and mortality. Gradual impro...Since the advent of liver resection as a treatment option for benign and malignant liver diseases, liver resections have continued to become safer with most centers reporting low morbidity and mortality. Gradual improvements in outcomes over the last decade have largely been due to improvement in surgical techniques including the more routine use of laparoscopy and advances in perioperative care.展开更多
COME rain or shine, the eforts of Chinese people in pursuing a better life are unstoppable, according to a Chinese language commentary which was published under the byline “Xuanyan” in the People＇s Daily on August ...COME rain or shine, the eforts of Chinese people in pursuing a better life are unstoppable, according to a Chinese language commentary which was published under the byline “Xuanyan” in the People＇s Daily on August 8. The 4,700-character article, titled “Create a Better Life, Come Rain or Shine,” summarized China’s development and reform since 1949, as well as its attitudes towards the challenges facing the country.展开更多
With flowers in full bloom, the International Horticultural Exhibition 2019 Beijing (Expo 2019) kicked off in the capital’s Yanqing District last April. The Expo 2019, as indicated by its theme “Live Green, Live Bet...With flowers in full bloom, the International Horticultural Exhibition 2019 Beijing (Expo 2019) kicked off in the capital’s Yanqing District last April. The Expo 2019, as indicated by its theme “Live Green, Live Better,” aims to “show the vision of green development, highlight the achievements of ecological progress, and promote the development of horticulture and green industries.”展开更多
Diabetes has become a major public health concern in the world and the total number of diabetic patients is considered to soar to 366 million in 2030. Emerging evidence has suggested that earlier detection of type 2 d...Diabetes has become a major public health concern in the world and the total number of diabetic patients is considered to soar to 366 million in 2030. Emerging evidence has suggested that earlier detection of type 2 diabetes, glycaemic control improvement and intensified risk factor management may result in clinically important improvements in diabetes-related morbidity and mortality. According to the World Health Organization （WHO）p strategies such as clinical questionnaires, urine glucose, blood glucose, glycated haemoglobin A1C （HbA1C） and combinations of the above tests can be used for screening diabetes.展开更多
I.International cooperation in building consultancy&design in Beijing Generally,developed countries such as the UK,France,USA and Australia are leading in the world in building consultancy & design,as some lan...I.International cooperation in building consultancy&design in Beijing Generally,developed countries such as the UK,France,USA and Australia are leading in the world in building consultancy & design,as some landmark buildings in Beijing were codesigned by China and these countries.The展开更多
1. The more. the better. 2. Better an empty purse than an empty head. 3. Better a glorious death than a shameful life 4. Better be alone than in bad company. 5. Better be the head of an ass (or: a dog) than the tail o...1. The more. the better. 2. Better an empty purse than an empty head. 3. Better a glorious death than a shameful life 4. Better be alone than in bad company. 5. Better be the head of an ass (or: a dog) than the tail of ahorse. 6. Better master one than engage with ten 7. Better to do well than to say well. 8. Better is a neighbour that is near than a brother far展开更多
文摘Load-balance is an important issue in wireless sensor networks (WSNs), especially in WSNs with hierarchical structure. Energy consumed unevenly will bring the production of hot spots. Hot spot will cause WSNs to divide some unconnected sub-networks and shorten the lifetime of WSNs. To tackle this problem, a load-balance mechanism is proposed based on minority game (MG) with dormancy strategy. This mechanism can cause the rich behaviors of cooperation , prolong lifetime of WSNs, and keep energy consumed evenly. This dormancy mechanism can save energy of nodes by keeping in sleep temperately . Simulation results show that the proposed strategy can efficiently enhance the lifetime of cluster and the lifetime of whole WSNs.
文摘To aware the topology of wireless sensor networks (WSN) with time-variety, and load-balance the resource of communication and energy, an opportunistic routing protocol for WSN based on Opportunistic Routing Entropy and ant colony optimization, called ACO-TDOP, is proposed. At first, based on the second law of thermo-dynamics, we introduce the concept of Opportunistic Routing Entropy which is a parameter representing the transmission state of each node by taking into account the power left and the distance to the sink node. Then, it is proved that the problem of route thinking about Opportunistic Routing Entropy is shown to be NP-hard. So the protocol, ACO-TDOP, is proposed. At last, numerical results confirm that the ACO-TDOP is energy conservative and throughput gainful compared with other two existing routing protocols, and show that it is efficacious to analyze and uncover fundamental of message transmission with Opportunistic Routing in wireless network using the second law of thermodynamics.
文摘Men struggle for human betterment for over thousands of years.In Mary Shelley’s Frankenstein,there are many heroes who struggle for human betterment,such as Frankenstein,the Modern Prometheus,Walton,and even the monster,etc.The better we live today the higher aims we want to reach in the future.In this Gothic novel,Mary Shelley shows her idea of the creation of life and the consequence of it.Some of her descriptions reflect her opinion.
文摘Can progesterone be a better alternative to dexamethasone for use in routine brain surgery？ Surgical brain injury （SBI） is a form of brain trauma caused by various forms of neurosurgical interventions including brain tumor excision, evacuation of intracere- bral hemorrhage and brain lobectomv （e.g., in epililepsv surger）.
文摘The low stress abrasion behaviours of heat treated mild, medium carbon and high C - low Cr steels, which are generally used in making farm implements, have been investigated. The simple heat treatment greatly improves the hardness, tensile strength and abrasion resistance of medium carbon and high C - low Cr steels. The results indicate that the material removal during abrasion is controlled by a number of factors, such as hardness, chemical composition, microstructure and heat treatment conditions. The conclusion is that the heat treated high C - low Cr steel and mild steel carburized by using coaltar pitch provide the best hardness and abrasion resistance and thus appear to be the most suitable materials for making agricultural tools.
基金Supported by the National Science Foundation of China(Grant 10626025)Research Grant of Chongqing Key Laboratory of Operations Research and System Engineering
文摘In this paper, a better admissible class B＋ is introduced and a new fixed point theorem for better admissible multimap is proved on abstract convex spaces. As a consequence, we deduce a new fixed point theorem on abstract convex Ф-spaces. Our main results generalize some recent work due to Lassonde, Kakutani, Browder, and Park
文摘Since the advent of liver resection as a treatment option for benign and malignant liver diseases, liver resections have continued to become safer with most centers reporting low morbidity and mortality. Gradual improvements in outcomes over the last decade have largely been due to improvement in surgical techniques including the more routine use of laparoscopy and advances in perioperative care.
文摘COME rain or shine, the eforts of Chinese people in pursuing a better life are unstoppable, according to a Chinese language commentary which was published under the byline “Xuanyan” in the People＇s Daily on August 8. The 4,700-character article, titled “Create a Better Life, Come Rain or Shine,” summarized China’s development and reform since 1949, as well as its attitudes towards the challenges facing the country.
文摘With flowers in full bloom, the International Horticultural Exhibition 2019 Beijing (Expo 2019) kicked off in the capital’s Yanqing District last April. The Expo 2019, as indicated by its theme “Live Green, Live Better,” aims to “show the vision of green development, highlight the achievements of ecological progress, and promote the development of horticulture and green industries.”
基金supported by the National Natural Science Foundation of China (30700385)the China Postdoctoral Science Foundation(20070410690)the Postdoctoral Fund of Shanghai Committee of Science and Technology
文摘Diabetes has become a major public health concern in the world and the total number of diabetic patients is considered to soar to 366 million in 2030. Emerging evidence has suggested that earlier detection of type 2 diabetes, glycaemic control improvement and intensified risk factor management may result in clinically important improvements in diabetes-related morbidity and mortality. According to the World Health Organization （WHO）p strategies such as clinical questionnaires, urine glucose, blood glucose, glycated haemoglobin A1C （HbA1C） and combinations of the above tests can be used for screening diabetes.
文摘I.International cooperation in building consultancy&design in Beijing Generally,developed countries such as the UK,France,USA and Australia are leading in the world in building consultancy & design,as some landmark buildings in Beijing were codesigned by China and these countries.The
文摘1. The more. the better. 2. Better an empty purse than an empty head. 3. Better a glorious death than a shameful life 4. Better be alone than in bad company. 5. Better be the head of an ass (or: a dog) than the tail of ahorse. 6. Better master one than engage with ten 7. Better to do well than to say well. 8. Better is a neighbour that is near than a brother far
