By contrast to a slowdown in the world economy, China kept up a rapid growth rate, a relatively high quality of growth and low inflation for the year 2001. This is mainly due to the result of proactive fiscal policies...By contrast to a slowdown in the world economy, China kept up a rapid growth rate, a relatively high quality of growth and low inflation for the year 2001. This is mainly due to the result of proactive fiscal policies that the Chinese Government adopted to stimulate domestic demand. Domestic demand can be divided into investment demand and consumption demand,展开更多
Africa’s Threatened Rhinos.Decimated by relentless poaching for their highly coveted horns,subjected to large-scale slaughter by“sports”hunters throughout the 19th and early 20th centuries,and squeezed by the stead...Africa’s Threatened Rhinos.Decimated by relentless poaching for their highly coveted horns,subjected to large-scale slaughter by“sports”hunters throughout the 19th and early 20th centuries,and squeezed by the steady loss of their natural habitats,both black and white rhinos have been pushed perilously close to extinction.展开更多
1 Fold two pieces of paper in half from top to bottom.2 Take one piece of paper.In the center of the folded side,cut two 3-cm lines.v^Cut them 5 cm apart.3 Open the card and push the tab in from the back.
[Objectives]To investigate the therapeutic effects of combined treatment on children diagnosed with pseudomyopia,based on the theoretical framework that the liver is associated with eye health in traditional Chinese m...[Objectives]To investigate the therapeutic effects of combined treatment on children diagnosed with pseudomyopia,based on the theoretical framework that the liver is associated with eye health in traditional Chinese medicine.[Methods]A multicenter randomized controlled trial was conducted involving 100 children,with the treatment group consisting of 50 participants receiving a combined treatment,while the control group,also comprising 50 participants,received conventional tuina.In the treatment group,the Yizhichan Pushing Manipulation was applied at a frequency of 120 times/min and a strength of 0.5-1.0 kg,targeting acupoints such as Ganyu and Guangming.The alterations in naked eye visual acuity,diopter measurements,and ciliary muscle regulation function were compared between the two groups of children both prior to and following treatment,and the clinical efficacy was assessed.[Results]The treatment group demonstrated a statistically significant enhancement in visual acuity(1.74±0.49 lines vs.1.02±0.52 lines),diopter improvement(0.91±0.29 D vs.0.46±0.25 D),and overall efficiency(96%vs.78%)when compared to the control group(all P<0.01).[Conclusions]This combined treatment exerts a therapeutic effect through a dual mechanism that involves the regulation of liver meridian qi and blood,as well as the enhancement of ciliary muscle function.This approach merits further dissemination and application in the prevention and management of myopia in children.展开更多
Higher education is transitioning from mass expansion to high-quality development.In this process,mental health issues among college students have become increasingly prominent,encompassing not only academic stress-in...Higher education is transitioning from mass expansion to high-quality development.In this process,mental health issues among college students have become increasingly prominent,encompassing not only academic stress-induced anxiety but also complex challenges such as interpersonal adaptation difficulties and career planning confusion.Traditional“problem-oriented”intervention models have shown limitations in responsiveness and adaptability,often only passively addressing existing psychological crises rather than preventing them in advance.This study aims to explore an AI-powered“positive psychology”proactive intervention model through developing an intelligent system.The system automatically collects,filters,and personalizes recommendations for positive activities on campus.Using a randomized controlled trial design,we conducted an 8-week intervention study involving 126 college students at a university.The study found that AI-based“campus positive activity”recommendations effectively boost students’positive emotions and promote psychological capital development through cumulative micro-interventions.This provides universities with empirical evidence and innovative methods to implement low-cost,efficient,and scalable mental health promotion programs through smart technology.展开更多
Purpose–MxV Rail conducted multiple single tie push tests(STPTs)between 2020 and 2023 to assess the changes in lateral tie resistance from tonnage accumulation,dynamic track stabilizers(DTS),tie type and ballast cond...Purpose–MxV Rail conducted multiple single tie push tests(STPTs)between 2020 and 2023 to assess the changes in lateral tie resistance from tonnage accumulation,dynamic track stabilizers(DTS),tie type and ballast condition.High lateral tie resistance is necessary for preventing lateral misalignments and track buckles.Therefore,understanding how various factors affect the lateral tie resistance will aid in the development of track buckling risk assessments and ballast maintenance best practices.Design/methodology/approach–The test involved tamping a section of track that consisted of both concrete and wood ties and then increasing the lateral tie resistance,using either tonnage during speed restrictions or a DTS.The STPTs and top-of-rail(TOR)elevation measurements were taken at multiple stages,including immediately after tamping and then after different tonnage increments or DTS.The results from this test were then added to a compiled measurement from previous tests,and the results from all the tests were used to develop general guidelines for ballast maintenance best practices and trade-off considerations.Findings–The results showed multiple factors affect the lateral track strength and therefore the susceptibility to misalignments and track buckles.The disturbance from ballast tamping can reduce the lateral track strength by 20–80%(∼45%median)and can be compacted from either tonnage(25–50%regain in strength after 0.1 m gross ton or MGT)or DTS(33–78%regain in strength).The amount of ballast(shoulder width and crib height),tie type and ballast characteristics all have a meaningful role in lateral track strength.Originality/value–This paper is based on the testing programs conducted by authors at MxV Rail.展开更多
Rural revitalization was a major focus during this year’s“two sessions.”THE drive to advance China’s all-around rural revitalization comprises advances in agriculture,revitalization of rural areas,and well-being o...Rural revitalization was a major focus during this year’s“two sessions.”THE drive to advance China’s all-around rural revitalization comprises advances in agriculture,revitalization of rural areas,and well-being of rural residents–the“three rural work,”as emphasized by Premier Li Qiang in the 2025 government work report.展开更多
It was a summer vacation afternoon ten years ago.Mum hurried Brother and me to the desk to do our homework.Brother was reluctant.While I was doing mine,he kept looking around.
To make herself look and feel pretty in summer dresses, 20-something Hepburn Zhang, an employee at an Internet company in Jiangsu Province, has committed herself to consuming light meals only for lunch and dinner sinc...To make herself look and feel pretty in summer dresses, 20-something Hepburn Zhang, an employee at an Internet company in Jiangsu Province, has committed herself to consuming light meals only for lunch and dinner since May. Additionally, she adheres to a strict three-times-a-week workout routine at the gym. These combined efforts have helped her shed 3 kg in one month."I often buy light food from salad stores.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
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
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
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
文摘By contrast to a slowdown in the world economy, China kept up a rapid growth rate, a relatively high quality of growth and low inflation for the year 2001. This is mainly due to the result of proactive fiscal policies that the Chinese Government adopted to stimulate domestic demand. Domestic demand can be divided into investment demand and consumption demand,
文摘Africa’s Threatened Rhinos.Decimated by relentless poaching for their highly coveted horns,subjected to large-scale slaughter by“sports”hunters throughout the 19th and early 20th centuries,and squeezed by the steady loss of their natural habitats,both black and white rhinos have been pushed perilously close to extinction.
文摘1 Fold two pieces of paper in half from top to bottom.2 Take one piece of paper.In the center of the folded side,cut two 3-cm lines.v^Cut them 5 cm apart.3 Open the card and push the tab in from the back.
基金Supported by Hospital-level Project of Shiyan Taihe Hospital(2018JJXM093).
文摘[Objectives]To investigate the therapeutic effects of combined treatment on children diagnosed with pseudomyopia,based on the theoretical framework that the liver is associated with eye health in traditional Chinese medicine.[Methods]A multicenter randomized controlled trial was conducted involving 100 children,with the treatment group consisting of 50 participants receiving a combined treatment,while the control group,also comprising 50 participants,received conventional tuina.In the treatment group,the Yizhichan Pushing Manipulation was applied at a frequency of 120 times/min and a strength of 0.5-1.0 kg,targeting acupoints such as Ganyu and Guangming.The alterations in naked eye visual acuity,diopter measurements,and ciliary muscle regulation function were compared between the two groups of children both prior to and following treatment,and the clinical efficacy was assessed.[Results]The treatment group demonstrated a statistically significant enhancement in visual acuity(1.74±0.49 lines vs.1.02±0.52 lines),diopter improvement(0.91±0.29 D vs.0.46±0.25 D),and overall efficiency(96%vs.78%)when compared to the control group(all P<0.01).[Conclusions]This combined treatment exerts a therapeutic effect through a dual mechanism that involves the regulation of liver meridian qi and blood,as well as the enhancement of ciliary muscle function.This approach merits further dissemination and application in the prevention and management of myopia in children.
文摘Higher education is transitioning from mass expansion to high-quality development.In this process,mental health issues among college students have become increasingly prominent,encompassing not only academic stress-induced anxiety but also complex challenges such as interpersonal adaptation difficulties and career planning confusion.Traditional“problem-oriented”intervention models have shown limitations in responsiveness and adaptability,often only passively addressing existing psychological crises rather than preventing them in advance.This study aims to explore an AI-powered“positive psychology”proactive intervention model through developing an intelligent system.The system automatically collects,filters,and personalizes recommendations for positive activities on campus.Using a randomized controlled trial design,we conducted an 8-week intervention study involving 126 college students at a university.The study found that AI-based“campus positive activity”recommendations effectively boost students’positive emotions and promote psychological capital development through cumulative micro-interventions.This provides universities with empirical evidence and innovative methods to implement low-cost,efficient,and scalable mental health promotion programs through smart technology.
文摘Purpose–MxV Rail conducted multiple single tie push tests(STPTs)between 2020 and 2023 to assess the changes in lateral tie resistance from tonnage accumulation,dynamic track stabilizers(DTS),tie type and ballast condition.High lateral tie resistance is necessary for preventing lateral misalignments and track buckles.Therefore,understanding how various factors affect the lateral tie resistance will aid in the development of track buckling risk assessments and ballast maintenance best practices.Design/methodology/approach–The test involved tamping a section of track that consisted of both concrete and wood ties and then increasing the lateral tie resistance,using either tonnage during speed restrictions or a DTS.The STPTs and top-of-rail(TOR)elevation measurements were taken at multiple stages,including immediately after tamping and then after different tonnage increments or DTS.The results from this test were then added to a compiled measurement from previous tests,and the results from all the tests were used to develop general guidelines for ballast maintenance best practices and trade-off considerations.Findings–The results showed multiple factors affect the lateral track strength and therefore the susceptibility to misalignments and track buckles.The disturbance from ballast tamping can reduce the lateral track strength by 20–80%(∼45%median)and can be compacted from either tonnage(25–50%regain in strength after 0.1 m gross ton or MGT)or DTS(33–78%regain in strength).The amount of ballast(shoulder width and crib height),tie type and ballast characteristics all have a meaningful role in lateral track strength.Originality/value–This paper is based on the testing programs conducted by authors at MxV Rail.
文摘Rural revitalization was a major focus during this year’s“two sessions.”THE drive to advance China’s all-around rural revitalization comprises advances in agriculture,revitalization of rural areas,and well-being of rural residents–the“three rural work,”as emphasized by Premier Li Qiang in the 2025 government work report.
文摘It was a summer vacation afternoon ten years ago.Mum hurried Brother and me to the desk to do our homework.Brother was reluctant.While I was doing mine,he kept looking around.
文摘To make herself look and feel pretty in summer dresses, 20-something Hepburn Zhang, an employee at an Internet company in Jiangsu Province, has committed herself to consuming light meals only for lunch and dinner since May. Additionally, she adheres to a strict three-times-a-week workout routine at the gym. These combined efforts have helped her shed 3 kg in one month."I often buy light food from salad stores.
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.
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.
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.
