MANCHESTER,UK-Having successfully demonstrated its WebSpector automated fabric inspection system detecting faults on camouflage fabrics at speeds of up to 100metres a minute during ITMA 2023,BTMA member Shelton Vision...MANCHESTER,UK-Having successfully demonstrated its WebSpector automated fabric inspection system detecting faults on camouflage fabrics at speeds of up to 100metres a minute during ITMA 2023,BTMA member Shelton Vision has secured an unprecedented number of new orders in many fields of the textile industry.The company has subsequently been recruiting additional staff in order to beef up its operations to meet delivery times and to grow capacity for the ongoing increased demand.展开更多
On a rainy night in October 1985,23-year-old archaeologist Zhang Xingde embarked on a 100-mile trek with the Niuheliang Hongshan Culture site excavation team including Guo Dashun to Xingcheng,where highly revered arch...On a rainy night in October 1985,23-year-old archaeologist Zhang Xingde embarked on a 100-mile trek with the Niuheliang Hongshan Culture site excavation team including Guo Dashun to Xingcheng,where highly revered archaeologist Su Bingqi was living.They brought a wooden box containing a goddess statue.展开更多
Building on the success of the company’s unique Evolon?product,Freudenberg Performance Materials has now pushed the limits even further by developing Evolon?New Generation.This high-tech textile is made from super-...Building on the success of the company’s unique Evolon?product,Freudenberg Performance Materials has now pushed the limits even further by developing Evolon?New Generation.This high-tech textile is made from super-microfilaments that are half the thickness and twice the density of those used in the original Evolon?.Evolon?展开更多
The central bank will continue to make more bilateral currency swap deals,and enlarge the scope and scale of renminbi settlements with countries along the'Belt and Road'Initiative to cut exchange rate risk and...The central bank will continue to make more bilateral currency swap deals,and enlarge the scope and scale of renminbi settlements with countries along the'Belt and Road'Initiative to cut exchange rate risk and transaction cost for trade and investment,said a senior central bank official recently.展开更多
Last week,Ministers and other high level officials made progress on establishing the details of how hundreds of billions of dollars in climate aid will be raised and distributed at an informal meeting in Geneva,Switze...Last week,Ministers and other high level officials made progress on establishing the details of how hundreds of billions of dollars in climate aid will be raised and distributed at an informal meeting in Geneva,Switzerland.展开更多
Building on the success of the company’s unique Evolon?product,Freudenberg Performance Materials has now pushed the limits even further by developing Evolon~? New Generation.This high-tech textile is made from super-...Building on the success of the company’s unique Evolon?product,Freudenberg Performance Materials has now pushed the limits even further by developing Evolon~? New Generation.This high-tech textile is made from super-microfilaments that are half the thickness and twice the density of those used in the original Evolon~?.Evolon~? New Generation complements the original Evolon~? by opening up entirely new applications in the fields of bedding。展开更多
David Mungania has always dreamt of owning a house. But the major obstacle for him is the high cost of housing. Being a tenant is costly and the stress of finding money for the high monthly rent adds to his woes.
The future has grown brighter for solar power,with the setting of a new world record for the efficiency of a silicon/perovskite solar cell in December 2020.Made using a layer of silicon in tandem with a thin-film laye...The future has grown brighter for solar power,with the setting of a new world record for the efficiency of a silicon/perovskite solar cell in December 2020.Made using a layer of silicon in tandem with a thin-film layer of synthetic perovskite,the cell had an area of 1.12 cm^(2) and was certified in independent testing by the US National Renewable Energy Laboratory(NREL)in Golden,CO,USA,to be 29.52% efficient[1].Plainly put,the tandem cell was able to convert nearly 30%of the simulated sunlight shining on it into electricity.展开更多
Confining stresses serve as a pivotal determinant in shaping the behavior of grouted rock bolts.Nonetheless,prior investigations have oversimplified the three-dimensional stress state,primarily assuming hydrostatic st...Confining stresses serve as a pivotal determinant in shaping the behavior of grouted rock bolts.Nonetheless,prior investigations have oversimplified the three-dimensional stress state,primarily assuming hydrostatic stress conditions.Under these conditions,it is assumed that the intermediate principal stress(σ_(2))equals the minimum principal stress(σ_(3)).This assumption overlooks the potential variations in magnitudes of in situ stress conditions along all three directions near an underground opening where a rock bolt is installed.In this study,a series of push tests was meticulously conducted under triaxial conditions.These tests involved applying non-uniform confining stresses(σ_(2)≠σ_(3))to cubic specimens,aiming to unveil the previously overlooked influence of intermediate principal stresses on the strength properties of rock bolts.The results show that as the confining stresses increase from zero to higher levels,the pre-failure behavior changes from linear to nonlinear forms,resulting in an increase in initial stiffness from 2.08 kN/mm to 32.51 kN/mm.The load-displacement curves further illuminate distinct post-failure behavior at elevated levels of confining stresses,characterized by enhanced stiffness.Notably,the peak load capacity ranged from 27.9 kN to 46.5 kN as confining stresses advanced from σ_(2)=σ_(3)=0 to σ_(2)=20 MPa and σ_(3)=10 MPa.Additionally,the outcomes highlight an influence of confining stress on the lateral deformation of samples.Lower levels of confinement prompt overall dilation in lateral deformation,while higher confinements maintain a state of shrinkage.Furthermore,diverse failure modes have been identified,intricately tied to the arrangement of confining stresses.Lower confinements tend to induce a splitting mode of failure,whereas higher loads bring about a shift towards a pure interfacial shear-off and shear-crushed failure mechanism.展开更多
Afterburning behind the detonation front of an aluminized explosive releases energy on the millisecond timescale,which prolong the release of detonation energy and the energy release at different stages also shows sig...Afterburning behind the detonation front of an aluminized explosive releases energy on the millisecond timescale,which prolong the release of detonation energy and the energy release at different stages also shows significant differences.However,at present,there are few effective methods for evaluating the energy release characteristics of the middle reaction stage of such explosives,which can have a duration of tens to hundreds of microseconds.The present work demonstrates an approach to assessing the midstage of an aluminized explosive detonation based on a water push test employing a high degree of confinement.In this method,the explosive is contained in a steel cylinder having one end closed that is installed at the bottom of a transparent water tank.Upon detonation,the gaseous products expand in one direction while forcing water ahead of them.The resulting underwater shock wave and the interface between the gas phase products and the water are tracked using an ultra-high-speed framing and streak camera.The shock wave velocity in water and the expansion work performed by the gaseous detonation products were calculated to assess the energy release characteristics of aluminized explosives such as CL-20 and RDX in the middle stage of the detonation reaction.During the middle stage of the detonation process of these aluminized explosives,the aluminum reaction reduced the attenuation of shock waves and increased the work performed by gas phase products.A higher aluminum content increased the energy output while the presence of oxidants slowed the energy release rate.This work demonstrates an effective means of evaluating the performance of aluminized explosives.展开更多
Robot-assisted rehabilitation is a crucial approach to restoring motor function in the limb.However,the current training trajectory lacks sufficient theoretical or practical support,and the monotony of single-mode tra...Robot-assisted rehabilitation is a crucial approach to restoring motor function in the limb.However,the current training trajectory lacks sufficient theoretical or practical support,and the monotony of single-mode training is a concern.Tai Chi Pushing Hands,a beneficial and effective daily exercise,has been shown to improve balance function,psychological state,and motor function of the upper extremities in patients recovering from stroke.To address these issues,we propose a new active rehabilitation training that incorporates Tai Chi Pushing Hands movements and yin-yang balance principles.The training trajectory and direction are encoded by the velocity field and consist of two processes:yang(push)and yin(return).During yang,the limb actively pushes the robot to move,while during yin,the limb actively follows the robot’s movement.To provide necessary assistance,an admittance controller with self-adaptive parameters is designed.In addition,we introduce two indexes,the‘Intention Angle’(ϖ)and the time ratio(Γ),to evaluate motion perception performance.Our experiment was conducted on a 4-degree-of-freedom upper limb rehabilitation robot platform,and the subjects were separated into a familiar group and an unfamiliar group.The experiment results show that the training could be completed well no matter whether the subject is familiar with Tai Chi Pushing Hands or not.The parameters and the movement of the robot can be adjusted based on the interactive force to adapt to the ability of the subject.展开更多
The rapid development of artificial intelligence(AI),especially the breakthroughs in generative AI technology,has pushed AI to the forefront of the information technology revolution and made the impacts of AI developm...The rapid development of artificial intelligence(AI),especially the breakthroughs in generative AI technology,has pushed AI to the forefront of the information technology revolution and made the impacts of AI development and its governance model an issue of great concern to the world.In November 2023,the first global AI Safety Summit held at Bletchley Park of the UK released the Bletchley Declaration signed by 28 countries and regional organizations.展开更多
The paper focuses on China's onshore bond market and the drivers of non-resident net portfolio flows into Chinese debt securities.Following a review of China's bond market,a simple theoretical model of push an...The paper focuses on China's onshore bond market and the drivers of non-resident net portfolio flows into Chinese debt securities.Following a review of China's bond market,a simple theoretical model of push and pull factors driving bond fiows is built.It represents a foundation for the empirical analysis on drivers of bond flows into China.Static and time-varying models are estimated to explain the importance of push and pull factors in China's bond market.While China-specific pull factors,such as domestic economic growth and asset returns,are important drivers of flows,the results reveal that global push factors,such as US interest rates and risk aversion,have recently gained significance as drivers of flows into China.The results confirm China's continued bond market deepening and integration with the rest of the world,which may have financial stability implications.Therefore,increased awareness regarding bond market developments in China is warranted.展开更多
Youth serve as a major economic asset for a country and can help propel its growth and development endeavors to new heights.Given China’s push for a series of technological and industrial upgrades,there is enormous r...Youth serve as a major economic asset for a country and can help propel its growth and development endeavors to new heights.Given China’s push for a series of technological and industrial upgrades,there is enormous room to spur new employment opportunities which in turn will advance technological progress.展开更多
A band of programs have been implemented in Zhejiang with the aim of streamlining administrative processes in the public interest.ENHANCING executive efficiency remains one of the priorities of east China’s Zhejiang ...A band of programs have been implemented in Zhejiang with the aim of streamlining administrative processes in the public interest.ENHANCING executive efficiency remains one of the priorities of east China’s Zhejiang Province,a coastal economic powerhouse.Over the past decade,it has launched a series of reforms to improve government performance and to better serve businesses and residents.展开更多
In recent years,China has implemented measures to advance the building of a unified national market,aiming to boost domestic demand and consolidate the foundations of its economic recovery.In March 2022,the Chinese go...In recent years,China has implemented measures to advance the building of a unified national market,aiming to boost domestic demand and consolidate the foundations of its economic recovery.In March 2022,the Chinese government issued a guideline on accelerating the construction of a unified national market.The issue was also a focus at the annual Central Economic Work Conference held in December 2023.展开更多
Stepping into 2024,with the increase of“knowledge density”of Chinese consumers,the“marketing discourse”of beauty brands has shifted from a perceptual“word game”to a serious“scientific argument”.Perhaps some br...Stepping into 2024,with the increase of“knowledge density”of Chinese consumers,the“marketing discourse”of beauty brands has shifted from a perceptual“word game”to a serious“scientific argument”.Perhaps some brands will shout“good times are coming”.But the reality is that communication turns out to be the weakest part between brand technology and consumers.Under the condition of technological“involution”and fragmented media ecology,the trust cost of brand communication is being pushed to a new high,and the efficiency of communication is rapidly decreasing.Many enterprises are trapped in the dilemma of content that is difficult to be expressed and communicated.展开更多
文摘MANCHESTER,UK-Having successfully demonstrated its WebSpector automated fabric inspection system detecting faults on camouflage fabrics at speeds of up to 100metres a minute during ITMA 2023,BTMA member Shelton Vision has secured an unprecedented number of new orders in many fields of the textile industry.The company has subsequently been recruiting additional staff in order to beef up its operations to meet delivery times and to grow capacity for the ongoing increased demand.
文摘On a rainy night in October 1985,23-year-old archaeologist Zhang Xingde embarked on a 100-mile trek with the Niuheliang Hongshan Culture site excavation team including Guo Dashun to Xingcheng,where highly revered archaeologist Su Bingqi was living.They brought a wooden box containing a goddess statue.
文摘Building on the success of the company’s unique Evolon?product,Freudenberg Performance Materials has now pushed the limits even further by developing Evolon?New Generation.This high-tech textile is made from super-microfilaments that are half the thickness and twice the density of those used in the original Evolon?.Evolon?
文摘The central bank will continue to make more bilateral currency swap deals,and enlarge the scope and scale of renminbi settlements with countries along the'Belt and Road'Initiative to cut exchange rate risk and transaction cost for trade and investment,said a senior central bank official recently.
文摘Last week,Ministers and other high level officials made progress on establishing the details of how hundreds of billions of dollars in climate aid will be raised and distributed at an informal meeting in Geneva,Switzerland.
文摘Building on the success of the company’s unique Evolon?product,Freudenberg Performance Materials has now pushed the limits even further by developing Evolon~? New Generation.This high-tech textile is made from super-microfilaments that are half the thickness and twice the density of those used in the original Evolon~?.Evolon~? New Generation complements the original Evolon~? by opening up entirely new applications in the fields of bedding。
文摘David Mungania has always dreamt of owning a house. But the major obstacle for him is the high cost of housing. Being a tenant is costly and the stress of finding money for the high monthly rent adds to his woes.
文摘The future has grown brighter for solar power,with the setting of a new world record for the efficiency of a silicon/perovskite solar cell in December 2020.Made using a layer of silicon in tandem with a thin-film layer of synthetic perovskite,the cell had an area of 1.12 cm^(2) and was certified in independent testing by the US National Renewable Energy Laboratory(NREL)in Golden,CO,USA,to be 29.52% efficient[1].Plainly put,the tandem cell was able to convert nearly 30%of the simulated sunlight shining on it into electricity.
文摘Confining stresses serve as a pivotal determinant in shaping the behavior of grouted rock bolts.Nonetheless,prior investigations have oversimplified the three-dimensional stress state,primarily assuming hydrostatic stress conditions.Under these conditions,it is assumed that the intermediate principal stress(σ_(2))equals the minimum principal stress(σ_(3)).This assumption overlooks the potential variations in magnitudes of in situ stress conditions along all three directions near an underground opening where a rock bolt is installed.In this study,a series of push tests was meticulously conducted under triaxial conditions.These tests involved applying non-uniform confining stresses(σ_(2)≠σ_(3))to cubic specimens,aiming to unveil the previously overlooked influence of intermediate principal stresses on the strength properties of rock bolts.The results show that as the confining stresses increase from zero to higher levels,the pre-failure behavior changes from linear to nonlinear forms,resulting in an increase in initial stiffness from 2.08 kN/mm to 32.51 kN/mm.The load-displacement curves further illuminate distinct post-failure behavior at elevated levels of confining stresses,characterized by enhanced stiffness.Notably,the peak load capacity ranged from 27.9 kN to 46.5 kN as confining stresses advanced from σ_(2)=σ_(3)=0 to σ_(2)=20 MPa and σ_(3)=10 MPa.Additionally,the outcomes highlight an influence of confining stress on the lateral deformation of samples.Lower levels of confinement prompt overall dilation in lateral deformation,while higher confinements maintain a state of shrinkage.Furthermore,diverse failure modes have been identified,intricately tied to the arrangement of confining stresses.Lower confinements tend to induce a splitting mode of failure,whereas higher loads bring about a shift towards a pure interfacial shear-off and shear-crushed failure mechanism.
基金supported by the National Natural Science Foundation of China(Grant No.11832006)。
文摘Afterburning behind the detonation front of an aluminized explosive releases energy on the millisecond timescale,which prolong the release of detonation energy and the energy release at different stages also shows significant differences.However,at present,there are few effective methods for evaluating the energy release characteristics of the middle reaction stage of such explosives,which can have a duration of tens to hundreds of microseconds.The present work demonstrates an approach to assessing the midstage of an aluminized explosive detonation based on a water push test employing a high degree of confinement.In this method,the explosive is contained in a steel cylinder having one end closed that is installed at the bottom of a transparent water tank.Upon detonation,the gaseous products expand in one direction while forcing water ahead of them.The resulting underwater shock wave and the interface between the gas phase products and the water are tracked using an ultra-high-speed framing and streak camera.The shock wave velocity in water and the expansion work performed by the gaseous detonation products were calculated to assess the energy release characteristics of aluminized explosives such as CL-20 and RDX in the middle stage of the detonation reaction.During the middle stage of the detonation process of these aluminized explosives,the aluminum reaction reduced the attenuation of shock waves and increased the work performed by gas phase products.A higher aluminum content increased the energy output while the presence of oxidants slowed the energy release rate.This work demonstrates an effective means of evaluating the performance of aluminized explosives.
基金supported by the Foundation of Henan Provincial Science and Technology Research Project in China(212102310890 and 212102310249).
文摘Robot-assisted rehabilitation is a crucial approach to restoring motor function in the limb.However,the current training trajectory lacks sufficient theoretical or practical support,and the monotony of single-mode training is a concern.Tai Chi Pushing Hands,a beneficial and effective daily exercise,has been shown to improve balance function,psychological state,and motor function of the upper extremities in patients recovering from stroke.To address these issues,we propose a new active rehabilitation training that incorporates Tai Chi Pushing Hands movements and yin-yang balance principles.The training trajectory and direction are encoded by the velocity field and consist of two processes:yang(push)and yin(return).During yang,the limb actively pushes the robot to move,while during yin,the limb actively follows the robot’s movement.To provide necessary assistance,an admittance controller with self-adaptive parameters is designed.In addition,we introduce two indexes,the‘Intention Angle’(ϖ)and the time ratio(Γ),to evaluate motion perception performance.Our experiment was conducted on a 4-degree-of-freedom upper limb rehabilitation robot platform,and the subjects were separated into a familiar group and an unfamiliar group.The experiment results show that the training could be completed well no matter whether the subject is familiar with Tai Chi Pushing Hands or not.The parameters and the movement of the robot can be adjusted based on the interactive force to adapt to the ability of the subject.
文摘The rapid development of artificial intelligence(AI),especially the breakthroughs in generative AI technology,has pushed AI to the forefront of the information technology revolution and made the impacts of AI development and its governance model an issue of great concern to the world.In November 2023,the first global AI Safety Summit held at Bletchley Park of the UK released the Bletchley Declaration signed by 28 countries and regional organizations.
文摘The paper focuses on China's onshore bond market and the drivers of non-resident net portfolio flows into Chinese debt securities.Following a review of China's bond market,a simple theoretical model of push and pull factors driving bond fiows is built.It represents a foundation for the empirical analysis on drivers of bond flows into China.Static and time-varying models are estimated to explain the importance of push and pull factors in China's bond market.While China-specific pull factors,such as domestic economic growth and asset returns,are important drivers of flows,the results reveal that global push factors,such as US interest rates and risk aversion,have recently gained significance as drivers of flows into China.The results confirm China's continued bond market deepening and integration with the rest of the world,which may have financial stability implications.Therefore,increased awareness regarding bond market developments in China is warranted.
文摘Youth serve as a major economic asset for a country and can help propel its growth and development endeavors to new heights.Given China’s push for a series of technological and industrial upgrades,there is enormous room to spur new employment opportunities which in turn will advance technological progress.
文摘A band of programs have been implemented in Zhejiang with the aim of streamlining administrative processes in the public interest.ENHANCING executive efficiency remains one of the priorities of east China’s Zhejiang Province,a coastal economic powerhouse.Over the past decade,it has launched a series of reforms to improve government performance and to better serve businesses and residents.
文摘In recent years,China has implemented measures to advance the building of a unified national market,aiming to boost domestic demand and consolidate the foundations of its economic recovery.In March 2022,the Chinese government issued a guideline on accelerating the construction of a unified national market.The issue was also a focus at the annual Central Economic Work Conference held in December 2023.
文摘Stepping into 2024,with the increase of“knowledge density”of Chinese consumers,the“marketing discourse”of beauty brands has shifted from a perceptual“word game”to a serious“scientific argument”.Perhaps some brands will shout“good times are coming”.But the reality is that communication turns out to be the weakest part between brand technology and consumers.Under the condition of technological“involution”and fragmented media ecology,the trust cost of brand communication is being pushed to a new high,and the efficiency of communication is rapidly decreasing.Many enterprises are trapped in the dilemma of content that is difficult to be expressed and communicated.