The Cap Pushing Response (CPR) is a free-flying technique used to study learning and memory in honey bees (Apis mellifera). The series of experiments outlined in this paper aimed to test whether honey bees exhibit the...The Cap Pushing Response (CPR) is a free-flying technique used to study learning and memory in honey bees (Apis mellifera). The series of experiments outlined in this paper aimed to test whether honey bees exhibit the cognitive concept of “expectancy” utilizing the CPR in a weight differentiation paradigm. Five previous experiments in our laboratory have explored whether the concept of expectancy can account for honey bee performance and have all failed to support the cognitive interpretation. The first experiment examined if bees could differentiate between the two caps in the amount of force they used to push the cap and the distance the cap was pushed when the caps were presented one at a time. The second experiment explored cap weight preference by presenting bees with a choice between the two caps. The third and fourth experiments tested the bee’s ability to expect reward or punishment based on cap weight. Results revealed that bees were found to have a strong preference for the light cap and therefore were not able to expect reward or punishment based on cap weight. These experiments contribute to the debate on whether bees have “cognitive” representations and continue to support the behaviorist interpretation.展开更多
Key policy document sets goals for China’s rural work for 2023 China has outlined nine key tasks for comprehensively promoting rural revitalisation this year in the “No.1 central document” of 2023 released on 13 Fe...Key policy document sets goals for China’s rural work for 2023 China has outlined nine key tasks for comprehensively promoting rural revitalisation this year in the “No.1 central document” of 2023 released on 13 February. As the first policy statement from China’s central authorities each year, the document.展开更多
Directly grasping the tightly stacked objects may cause collisions and result in failures,degenerating the functionality of robotic arms.Inspired by the observation that first pushing objects to a state of mutual sepa...Directly grasping the tightly stacked objects may cause collisions and result in failures,degenerating the functionality of robotic arms.Inspired by the observation that first pushing objects to a state of mutual separation and then grasping them individually can effectively increase the success rate,we devise a novel deep Q-learning framework to achieve collaborative pushing and grasping.Specifically,an efficient non-maximum suppression policy(PolicyNMS)is proposed to dynamically evaluate pushing and grasping actions by enforcing a suppression constraint on unreasonable actions.Moreover,a novel data-driven pushing reward network called PR-Net is designed to effectively assess the degree of separation or aggregation between objects.To benchmark the proposed method,we establish a dataset containing common household items dataset(CHID)in both simulation and real scenarios.Although trained using simulation data only,experiment results validate that our method generalizes well to real scenarios and achieves a 97%grasp success rate at a fast speed for object separation in the real-world environment.展开更多
Anti-slide pile is one of the important methods to administer landslide geological disaster because of its advantages.It plays important role in administering landslide.It is a premise of reasonable economy and techno...Anti-slide pile is one of the important methods to administer landslide geological disaster because of its advantages.It plays important role in administering landslide.It is a premise of reasonable economy and technological advance to know the distribution rule and feature of the force between anti-sliding pile and surrounding rock.To determine the sliding force and remnant resistant sliding force,according to need of study,this paper sets up the geological model and mechanics model in term of a typical landslide,and analyzes the effect rule of sliding body distortion,strength and gravity to the pushing force and remnant resistant sliding force by use of the numerical model.The distribution rule of pushing force and remnant resistant sliding force of the type of landslide is given.展开更多
The movie Pushing Hands demonstrated the conflicts in the process of intercultural communication between China andwestern countries, revealing different perspectives of culture values. However, these conflicts of inte...The movie Pushing Hands demonstrated the conflicts in the process of intercultural communication between China andwestern countries, revealing different perspectives of culture values. However, these conflicts of intercultural communication canbe handled by accepting and communicating, and understanding others' cultures.展开更多
The applications of magnetrons are greatly limited because of the poor output spectrum of the free-running magnetron.Currently, one of the best ways to solve this problem is injection locking. However, the injection l...The applications of magnetrons are greatly limited because of the poor output spectrum of the free-running magnetron.Currently, one of the best ways to solve this problem is injection locking. However, the injection locking theory which is widely used nowadays is based on the simplified oscillator, which does not include the frequency pushing effect of the magnetron. In this paper, the theory of injection locking magnetrons with frequency pushing effect is systematically studied.Analytical analysis shows that the locking bandwidth turns larger with the consideration of the pushing parameter(α), and the increase of locking bandwidth is expanded with α increasing. Experimental results show that the locking bandwidth is expanded by 0.3 MHz, 1 MHz, and 1.6 MHz compared with the locking bandwidth from the conventional locking theory under an injection ratio(ρ) of 0.05, 0.075, and 0.1, respectively. This research provides a more accurate prediction of the properties of the injection-locked magnetron.展开更多
The reliability of aerospace relay directly influences the reliability of thewhole system. The analysis and research on the optimum position of aerospace relay's pushing rodare an important process of aerospace re...The reliability of aerospace relay directly influences the reliability of thewhole system. The analysis and research on the optimum position of aerospace relay's pushing rodare an important process of aerospace relay reliability design. In the past, most researches weredone for electromagnetic systems and spring systems of aerospace relays. However, there was not anyresearch on the position of the pushing rod. An analytical method for the optimum position ofaerospace relay's pushing rod is presented in this paper. From four aspects, including theelectromagnetic force and torque, work done by the electromagnetic force and displacement, theoptimum position of a pushing rod is investigated based on the analysis of a straight spring system.The conclusions can be used to direct the optimum design and assembling of aerospace relays.展开更多
For in situ composite materials, the interaction between the second phase particles and the solidification interface attracts more attentions of people, for concerning the final distribution of the particles on the ...For in situ composite materials, the interaction between the second phase particles and the solidification interface attracts more attentions of people, for concerning the final distribution of the particles on the matrix. With the conception of the local solidification time, a kinematics mechanism of particle pushing into the crystal boundary during the solidification process was assumed. Through the analysis of forces acted on the particle in front of the solid/liquid interface the critical velocity criterion for the particles pushing was given. The calculation results show when the growth rate of the interface V is less than or equals to the critical velocity V C , the particles on the solid/liquid interface is pushed into the boundary region of cellular crystals, where they are distributed as a chain like straight, which forms a particle strengthened in situ composite materials.展开更多
THE Fourth Industrial Revolution has set off a wave of technological innovation. New technologies, such as artificial intelligence, virtual reality, quantum information technology, unmanned technology, and biotechnolo...THE Fourth Industrial Revolution has set off a wave of technological innovation. New technologies, such as artificial intelligence, virtual reality, quantum information technology, unmanned technology, and biotechnology, have sprung up at an unprecedented rate, injecting new impetus into the development of the world economy and bringing the global economy into a new era.展开更多
President Jiang Zeming’s U.S.visit together with Jiang-Clinton WashingtonSummit last October has worked out the direction and a basic framework forChina-U.S.relations in the 21st century.It represents a landmark in t...President Jiang Zeming’s U.S.visit together with Jiang-Clinton WashingtonSummit last October has worked out the direction and a basic framework forChina-U.S.relations in the 21st century.It represents a landmark in the annualsof bilateral ties between the two great nations.This is the first year,when bothshores of the Pacific Ocean are working hard to lay bricks for a constructive strate-展开更多
I.The Situation of China’s People-to-People Diplomacy in the New Era As an indispensable part in China’s overall diplomacy, the people-to-people diplomacy aims at enhancing the friendship between peoples, and hence ...I.The Situation of China’s People-to-People Diplomacy in the New Era As an indispensable part in China’s overall diplomacy, the people-to-people diplomacy aims at enhancing the friendship between peoples, and hence promoting state-to-state relations. As one of the most vibrant areas with full development potential in China’s overall diplomacy,展开更多
Translating cultural specific items(CSI)in a movie involves the culture behind the terms,CSI translation methodologyand the subtitle translation methodology,which makes subtitles in Pushing Hands(推手)about the Chines...Translating cultural specific items(CSI)in a movie involves the culture behind the terms,CSI translation methodologyand the subtitle translation methodology,which makes subtitles in Pushing Hands(推手)about the Chinese medicine more difficultto translate.In Pushing Hands,frequent emergence of CSI poses a challenge for translators.Likewise,reproducing the aesthetic ef-fects of a Chinese poem can be impeded in the clash of distinct cultures.Therefore,our group studied related samples,drawing ontheories like skopos,text typology,functional equivalence,etc.展开更多
government to enact and implement prudent policies to revive the moribund economy which has taken a severe battering for close to two decades. In that period political strife within and among the major politica partie...government to enact and implement prudent policies to revive the moribund economy which has taken a severe battering for close to two decades. In that period political strife within and among the major politica parties took center stage, overshadowing social and economic development.展开更多
The Fourth Plenary Session of the 18th Central Committee of the Communist Party of China (CPC) reviewed and approved the Decision of the CPC Central Committee on Certain Key Issues Concerning Comprehensively Pushing...The Fourth Plenary Session of the 18th Central Committee of the Communist Party of China (CPC) reviewed and approved the Decision of the CPC Central Committee on Certain Key Issues Concerning Comprehensively Pushing Forward the Rule of Law (hereafter, "Decision"). The plenary session was convened at a pivotal stage in comprehensively building a well-off society and comprehen- sively deepening reform. It was the first of its kind with the theme of the rule of law and was a landmark event in China's legal construction. The Journal interviewed Professor Luo Haocai, who is also president of the China Society for Human Rights Studies (CSHRS).展开更多
CHINA'S state leaders have a universal image of serious faces, jet black hair and dark austere suits. But a recent cartoon video is changing this stere- otype.
The Kenyan Government has a full agenda for 2011 by Alphonce Shiundu FOR Kenya,the year 2011 is the year when the country will determine whether it wants to move to the promised land of justice,good governance and pro...The Kenyan Government has a full agenda for 2011 by Alphonce Shiundu FOR Kenya,the year 2011 is the year when the country will determine whether it wants to move to the promised land of justice,good governance and prosperity;or sink back to its dubious past of tribalism,impunity, corruption and extreme poverty. It’s a make-or-break year for the 47-year-old independent country.Looking at the government’s in-tray for the展开更多
On 9 September 2016,global Internet data traffic flew past the milestone of 1 ZB,or 1021 bytes-a trillion gigabytes-per year.If you imagine every one of those gigabytes as a brick,a trillion of them would allow you to...On 9 September 2016,global Internet data traffic flew past the milestone of 1 ZB,or 1021 bytes-a trillion gigabytes-per year.If you imagine every one of those gigabytes as a brick,a trillion of them would allow you to build 258 Great Walls of China,one analyst estimated[1].It took nearly 40 years for the Internet to hit that mark.By 2022,annual Internet traffic is expected to reach almost 5 ZB[2].展开更多
The stress distribution on the failure progress of fiber pushed-out test was studied. A numerical program, developed by meso-damage mechanics, was adopted to simulate the whole failure process of interface debonding a...The stress distribution on the failure progress of fiber pushed-out test was studied. A numerical program, developed by meso-damage mechanics, was adopted to simulate the whole failure process of interface debonding and fiber pushing out. From the simulation, it can be concluded that, the interfacial stress on load side and support side is larger than other portions. Simultaneously, the shear stress in both sides becomes larger when thickness of sample reduces. Furthermore, when the diameter of fiber increases, the shear stress on load side is getting larger but in support side it is diminishing. On the other hand, changes of the support hole’s diameter only affect the interfacial shear stress on the support side.展开更多
文摘The Cap Pushing Response (CPR) is a free-flying technique used to study learning and memory in honey bees (Apis mellifera). The series of experiments outlined in this paper aimed to test whether honey bees exhibit the cognitive concept of “expectancy” utilizing the CPR in a weight differentiation paradigm. Five previous experiments in our laboratory have explored whether the concept of expectancy can account for honey bee performance and have all failed to support the cognitive interpretation. The first experiment examined if bees could differentiate between the two caps in the amount of force they used to push the cap and the distance the cap was pushed when the caps were presented one at a time. The second experiment explored cap weight preference by presenting bees with a choice between the two caps. The third and fourth experiments tested the bee’s ability to expect reward or punishment based on cap weight. Results revealed that bees were found to have a strong preference for the light cap and therefore were not able to expect reward or punishment based on cap weight. These experiments contribute to the debate on whether bees have “cognitive” representations and continue to support the behaviorist interpretation.
文摘Key policy document sets goals for China’s rural work for 2023 China has outlined nine key tasks for comprehensively promoting rural revitalisation this year in the “No.1 central document” of 2023 released on 13 February. As the first policy statement from China’s central authorities each year, the document.
基金This work was supported by the National Natural Science Foundation of China(61873077,61806062)Zhejiang Provincial Major Research and Development Project of China(2020C01110)Zhejiang Provincial Key Laboratory of Equipment Electronics.
文摘Directly grasping the tightly stacked objects may cause collisions and result in failures,degenerating the functionality of robotic arms.Inspired by the observation that first pushing objects to a state of mutual separation and then grasping them individually can effectively increase the success rate,we devise a novel deep Q-learning framework to achieve collaborative pushing and grasping.Specifically,an efficient non-maximum suppression policy(PolicyNMS)is proposed to dynamically evaluate pushing and grasping actions by enforcing a suppression constraint on unreasonable actions.Moreover,a novel data-driven pushing reward network called PR-Net is designed to effectively assess the degree of separation or aggregation between objects.To benchmark the proposed method,we establish a dataset containing common household items dataset(CHID)in both simulation and real scenarios.Although trained using simulation data only,experiment results validate that our method generalizes well to real scenarios and achieves a 97%grasp success rate at a fast speed for object separation in the real-world environment.
文摘Anti-slide pile is one of the important methods to administer landslide geological disaster because of its advantages.It plays important role in administering landslide.It is a premise of reasonable economy and technological advance to know the distribution rule and feature of the force between anti-sliding pile and surrounding rock.To determine the sliding force and remnant resistant sliding force,according to need of study,this paper sets up the geological model and mechanics model in term of a typical landslide,and analyzes the effect rule of sliding body distortion,strength and gravity to the pushing force and remnant resistant sliding force by use of the numerical model.The distribution rule of pushing force and remnant resistant sliding force of the type of landslide is given.
文摘The movie Pushing Hands demonstrated the conflicts in the process of intercultural communication between China andwestern countries, revealing different perspectives of culture values. However, these conflicts of intercultural communication canbe handled by accepting and communicating, and understanding others' cultures.
基金Project supported by the Sichuan Science and Technology Program,China(Grant No.2019YFG0419)the National Natural Science Foundation of China(Grant No.61601312)
文摘The applications of magnetrons are greatly limited because of the poor output spectrum of the free-running magnetron.Currently, one of the best ways to solve this problem is injection locking. However, the injection locking theory which is widely used nowadays is based on the simplified oscillator, which does not include the frequency pushing effect of the magnetron. In this paper, the theory of injection locking magnetrons with frequency pushing effect is systematically studied.Analytical analysis shows that the locking bandwidth turns larger with the consideration of the pushing parameter(α), and the increase of locking bandwidth is expanded with α increasing. Experimental results show that the locking bandwidth is expanded by 0.3 MHz, 1 MHz, and 1.6 MHz compared with the locking bandwidth from the conventional locking theory under an injection ratio(ρ) of 0.05, 0.075, and 0.1, respectively. This research provides a more accurate prediction of the properties of the injection-locked magnetron.
文摘The reliability of aerospace relay directly influences the reliability of thewhole system. The analysis and research on the optimum position of aerospace relay's pushing rodare an important process of aerospace relay reliability design. In the past, most researches weredone for electromagnetic systems and spring systems of aerospace relays. However, there was not anyresearch on the position of the pushing rod. An analytical method for the optimum position ofaerospace relay's pushing rod is presented in this paper. From four aspects, including theelectromagnetic force and torque, work done by the electromagnetic force and displacement, theoptimum position of a pushing rod is investigated based on the analysis of a straight spring system.The conclusions can be used to direct the optimum design and assembling of aerospace relays.
基金ProjectsupportedbytheNationalNaturalScienceFoundationof China (5 0 0 75 0 5 1)
文摘For in situ composite materials, the interaction between the second phase particles and the solidification interface attracts more attentions of people, for concerning the final distribution of the particles on the matrix. With the conception of the local solidification time, a kinematics mechanism of particle pushing into the crystal boundary during the solidification process was assumed. Through the analysis of forces acted on the particle in front of the solid/liquid interface the critical velocity criterion for the particles pushing was given. The calculation results show when the growth rate of the interface V is less than or equals to the critical velocity V C , the particles on the solid/liquid interface is pushed into the boundary region of cellular crystals, where they are distributed as a chain like straight, which forms a particle strengthened in situ composite materials.
文摘THE Fourth Industrial Revolution has set off a wave of technological innovation. New technologies, such as artificial intelligence, virtual reality, quantum information technology, unmanned technology, and biotechnology, have sprung up at an unprecedented rate, injecting new impetus into the development of the world economy and bringing the global economy into a new era.
文摘President Jiang Zeming’s U.S.visit together with Jiang-Clinton WashingtonSummit last October has worked out the direction and a basic framework forChina-U.S.relations in the 21st century.It represents a landmark in the annualsof bilateral ties between the two great nations.This is the first year,when bothshores of the Pacific Ocean are working hard to lay bricks for a constructive strate-
文摘I.The Situation of China’s People-to-People Diplomacy in the New Era As an indispensable part in China’s overall diplomacy, the people-to-people diplomacy aims at enhancing the friendship between peoples, and hence promoting state-to-state relations. As one of the most vibrant areas with full development potential in China’s overall diplomacy,
文摘Translating cultural specific items(CSI)in a movie involves the culture behind the terms,CSI translation methodologyand the subtitle translation methodology,which makes subtitles in Pushing Hands(推手)about the Chinese medicine more difficultto translate.In Pushing Hands,frequent emergence of CSI poses a challenge for translators.Likewise,reproducing the aesthetic ef-fects of a Chinese poem can be impeded in the clash of distinct cultures.Therefore,our group studied related samples,drawing ontheories like skopos,text typology,functional equivalence,etc.
文摘government to enact and implement prudent policies to revive the moribund economy which has taken a severe battering for close to two decades. In that period political strife within and among the major politica parties took center stage, overshadowing social and economic development.
文摘The Fourth Plenary Session of the 18th Central Committee of the Communist Party of China (CPC) reviewed and approved the Decision of the CPC Central Committee on Certain Key Issues Concerning Comprehensively Pushing Forward the Rule of Law (hereafter, "Decision"). The plenary session was convened at a pivotal stage in comprehensively building a well-off society and comprehen- sively deepening reform. It was the first of its kind with the theme of the rule of law and was a landmark event in China's legal construction. The Journal interviewed Professor Luo Haocai, who is also president of the China Society for Human Rights Studies (CSHRS).
文摘CHINA'S state leaders have a universal image of serious faces, jet black hair and dark austere suits. But a recent cartoon video is changing this stere- otype.
文摘The Kenyan Government has a full agenda for 2011 by Alphonce Shiundu FOR Kenya,the year 2011 is the year when the country will determine whether it wants to move to the promised land of justice,good governance and prosperity;or sink back to its dubious past of tribalism,impunity, corruption and extreme poverty. It’s a make-or-break year for the 47-year-old independent country.Looking at the government’s in-tray for the
文摘On 9 September 2016,global Internet data traffic flew past the milestone of 1 ZB,or 1021 bytes-a trillion gigabytes-per year.If you imagine every one of those gigabytes as a brick,a trillion of them would allow you to build 258 Great Walls of China,one analyst estimated[1].It took nearly 40 years for the Internet to hit that mark.By 2022,annual Internet traffic is expected to reach almost 5 ZB[2].
基金Funded by the National Natural Science Foundation of China(No.50778046)S&T Project No.2006B14601004,Guangdong ProvinceS&T Project No.62047, Education Bureau, Guangzhou City
文摘The stress distribution on the failure progress of fiber pushed-out test was studied. A numerical program, developed by meso-damage mechanics, was adopted to simulate the whole failure process of interface debonding and fiber pushing out. From the simulation, it can be concluded that, the interfacial stress on load side and support side is larger than other portions. Simultaneously, the shear stress in both sides becomes larger when thickness of sample reduces. Furthermore, when the diameter of fiber increases, the shear stress on load side is getting larger but in support side it is diminishing. On the other hand, changes of the support hole’s diameter only affect the interfacial shear stress on the support side.