The urban and community forestry movement in the United States has matured over the last 20 years from managing street trees, to understanding the benefits of trees in urban ecosystems, and now to managing urban green...The urban and community forestry movement in the United States has matured over the last 20 years from managing street trees, to understanding the benefits of trees in urban ecosystems, and now to managing urban green infrastructure. This paper introduced the history, development, and major accomplishments of the urban and community forestry movement, highlighted the economic, ecological, environmental, and social values of forests and trees to communities, and discussed issues and trends of the urban and community forestry program in the United States.展开更多
Learning, inheritance and development of undergraduates' traditional artistic accomplishments is of realistic signifi cance in the modern society, integration of traditional artistic accomplishments in practice te...Learning, inheritance and development of undergraduates' traditional artistic accomplishments is of realistic signifi cance in the modern society, integration of traditional artistic accomplishments in practice teaching will broaden the channels of modern undergraduates acquiring traditional artistic accomplishments. Learning traditional artistic accomplishments should be the colorful and vivid practice class on and off campus, moreover, students' recognition of traditional artistic accomplishments should be strengthened, and their understanding about traditional arts should be deepened. Full utilization of social resources of traditional arts helps learn the connotations of traditional artistic accomplishments, so that traditional artistic accomplishments will realize its theoretical and practical signifi cance in the rapidly-developing modern society.展开更多
The 100th anniversary of the birth of Prof.Kun Huang is in this year.Prof.Huang is a paragon of the older generation of Chinese scientists.He had made great achievements in solid state physics.After the founding of th...The 100th anniversary of the birth of Prof.Kun Huang is in this year.Prof.Huang is a paragon of the older generation of Chinese scientists.He had made great achievements in solid state physics.After the founding of the People’s Republic of China,he returned to China immediately,and devoted himself to education.展开更多
Cheng Guodong Cheng Guodong is a research professor at the Lanzhou Institute of Glaciology & Cryopedology, an affiliate to the CAS. A major in hydrogeology and engineering geology when studying in the Beijing Coll...Cheng Guodong Cheng Guodong is a research professor at the Lanzhou Institute of Glaciology & Cryopedology, an affiliate to the CAS. A major in hydrogeology and engineering geology when studying in the Beijing College of Geology, Prof. Cheng started his life-long career of a permafrost specialist after having left the campus in 1965. His research work is almost entirely carried out on the Qinghai-Tibet Plateau, covering the following three aspects: 1. Contributions to several key engineering projects in permafrost regions. At present, China has not set up standardized norms for geological surveys, engineering design and construction展开更多
Ai Guoxiang Professor Ai Guoxiang has been studying solar physics in Beijing Astronomic Observatory of the CAS since his graduation from the Department of Geophysics of Peking University in 1963.His main achievements ...Ai Guoxiang Professor Ai Guoxiang has been studying solar physics in Beijing Astronomic Observatory of the CAS since his graduation from the Department of Geophysics of Peking University in 1963.His main achievements in the field are as follows: 1.Promoting the development of measuring method of solar magnetic field for three times In 1966, he analyzed the development of instruments of solar physics over the past 400 years or so with the viewpoint of dialectical materialism,and proposed a concept on solar magnetic field telescope,which is a展开更多
This article gives a systematic and comprehensive summary of the marine research results ac complished by the Chinese Academy of Sciences (CAS) with the support of the National High-tech Research and Development Progr...This article gives a systematic and comprehensive summary of the marine research results ac complished by the Chinese Academy of Sciences (CAS) with the support of the National High-tech Research and Development Program during the period of the Ninth Five-year Plan (1996 - 2000). It includes achievements in the exploitation of marine resources, protection of the marine environment, reduction of marine disasters and the safeguarding of national marine sovereignty.展开更多
Today in the 21st century, Science and technology (S&T)develops by leaps and bounds. Such progress has fundamentally changed the development pace of history, becoming the principal driving force for the progre... Today in the 21st century, Science and technology (S&T)develops by leaps and bounds. Such progress has fundamentally changed the development pace of history, becoming the principal driving force for the progress of human civilization.……展开更多
1 Students have many opportunities to meet their goals and be proud of their personal accomplishments throughout high school.A student might lead a sports team to victory,earn a high grade on a test or hold a new club...1 Students have many opportunities to meet their goals and be proud of their personal accomplishments throughout high school.A student might lead a sports team to victory,earn a high grade on a test or hold a new club activity.Sophomore Katie Limberg has writ⁃ten a novel.展开更多
1 Nothing makes you feel quite so accomplished as slurping down a bowl of Chinese handmade noodles that you kneaded(揉),rolled,and cut from scratch.These deliciously chewy,springy noodles can be served in soup or mixe...1 Nothing makes you feel quite so accomplished as slurping down a bowl of Chinese handmade noodles that you kneaded(揉),rolled,and cut from scratch.These deliciously chewy,springy noodles can be served in soup or mixed with whatever tasty sauces and toppings you can dream up for a delicious meal.But how to make handmade noodles?Here are some key tips.展开更多
Top-level officials shared their views of regional economic and social development at the Third Session of the 11th National People’s Congress.Nur Bekri, Chairman of Xinjiang Uygur Autonomous
Chinese Physics B(Chin.Phys.B),formerly titled Chinese Physics,is published monthly in English by the Chinese Physical Society(CPS)and IOP Publishing Ltd.It is an international academic journal,aiming to publish origi...Chinese Physics B(Chin.Phys.B),formerly titled Chinese Physics,is published monthly in English by the Chinese Physical Society(CPS)and IOP Publishing Ltd.It is an international academic journal,aiming to publish original papers and rapid communications reflecting creative and innovative achievements in physics worldwide,as well as review articles covering important accomplishments in frontiers of physics.The journal has been abstracted in international index systems including SCI and INSPEC.展开更多
Chinese Physics B(Chin.Phys.B),formerly titled Chinese Physics,is published monthly in English by the Chinese Physical Society(CPS)and IOP Publishing Ltd.It is an international academic journal,aiming to publish origi...Chinese Physics B(Chin.Phys.B),formerly titled Chinese Physics,is published monthly in English by the Chinese Physical Society(CPS)and IOP Publishing Ltd.It is an international academic journal,aiming to publish original papers and rapid communications refecting creative and innovative achievements in physics worldwide,as well as review articles covering important accomplishments in frontiers of physics.The journal has been abstracted in international index systems including SCI and INSPEC.展开更多
Single-junction and tandem perovskite solar cells(PSCs)have achieved impressive power conversion efficiencies(PCEs)of 25.7%and 31.3%,respectively,which makes it to be one of next-generation photovoltaic technologies[1...Single-junction and tandem perovskite solar cells(PSCs)have achieved impressive power conversion efficiencies(PCEs)of 25.7%and 31.3%,respectively,which makes it to be one of next-generation photovoltaic technologies[1−9].Inter-face engineering[3,5,10−12],composition engineering[13]and ad-ditive engineering[7,14,15]have made remarkable contribu-tions to efficiency enhancement.Compared with efficiency,the long-term operational stability of PSCs jogs along,which is far from the requirements of commercialization.Currently,almost all regular n-i-p PSCs were accomplished with classic-al organic hole-transport materials(HTMs),i.e.,PTAA[16]and spiro-OMeTAD[2,4,6].However,the highly efficient PSCs with the above organic hole-transport layers(HTL)usually suffer from instability.To facilitate hole transport and extraction,LiTF-SI and tBP are frequently employed to dope organic HTLs but this would sacrifice device stability.The use of these hygro-scopic p-dopants endows the devices with poor moisture sta-bility.展开更多
The year 2022 marks the 50th anniversary of the establishment of diplomatic ties between China and New Zealand.Over the past half century,China-New Zealand relations have achieved many firsts and historic accomplishme...The year 2022 marks the 50th anniversary of the establishment of diplomatic ties between China and New Zealand.Over the past half century,China-New Zealand relations have achieved many firsts and historic accomplishments.Among them,economic and trade cooperation has been the stabilizer of bilateral relations.With highly complementary economies,bilateral trade has increased from NZD 7 million to NZD 37.7 billion over the past 50 years.China has been New Zealand’s largest export market and source of imports for many consecutive years.展开更多
It is truly remarkable to see the substantial progress that the African Union has achieved in implementing the Agenda 2063 in its initial decade from 2014 to 2023.This period has witnessed significant accomplishments ...It is truly remarkable to see the substantial progress that the African Union has achieved in implementing the Agenda 2063 in its initial decade from 2014 to 2023.This period has witnessed significant accomplishments that have laid the foundation for Africa’s development,collaboration,and strategic partnerships.展开更多
Tourist's satisfaction degree is one of the important indexes to evaluate the service quality of scenic spot.Taking Xi'an Dongda Hot Spring Resort Area for an example,with the expectation difference theory and...Tourist's satisfaction degree is one of the important indexes to evaluate the service quality of scenic spot.Taking Xi'an Dongda Hot Spring Resort Area for an example,with the expectation difference theory and customers' satisfaction evaluation model as the theoretical basis of the research,the overall satisfaction degree of tourists to hot spring resort area,and the actual sensation accomplishments and the expectation difference of each service index were analyzed by using regression analysis and paired sample t test method.The results showed:① The overall satisfaction degree of tourists to the resort area was higher.There were remarkable correlation among three variables:the sensation value,the overall satisfaction degree,and the tourist's loyalty degree;② Generally,the sensation actual accomplishments of 15 service appraisal factors were higher than the expectation value.According to the characteristics,these 15 service appraisal factors were divided into 5 groups.Some unsatisfactory aspects were found out,and the corrective measures were put forward.展开更多
文摘The urban and community forestry movement in the United States has matured over the last 20 years from managing street trees, to understanding the benefits of trees in urban ecosystems, and now to managing urban green infrastructure. This paper introduced the history, development, and major accomplishments of the urban and community forestry movement, highlighted the economic, ecological, environmental, and social values of forests and trees to communities, and discussed issues and trends of the urban and community forestry program in the United States.
文摘Learning, inheritance and development of undergraduates' traditional artistic accomplishments is of realistic signifi cance in the modern society, integration of traditional artistic accomplishments in practice teaching will broaden the channels of modern undergraduates acquiring traditional artistic accomplishments. Learning traditional artistic accomplishments should be the colorful and vivid practice class on and off campus, moreover, students' recognition of traditional artistic accomplishments should be strengthened, and their understanding about traditional arts should be deepened. Full utilization of social resources of traditional arts helps learn the connotations of traditional artistic accomplishments, so that traditional artistic accomplishments will realize its theoretical and practical signifi cance in the rapidly-developing modern society.
文摘The 100th anniversary of the birth of Prof.Kun Huang is in this year.Prof.Huang is a paragon of the older generation of Chinese scientists.He had made great achievements in solid state physics.After the founding of the People’s Republic of China,he returned to China immediately,and devoted himself to education.
文摘Cheng Guodong Cheng Guodong is a research professor at the Lanzhou Institute of Glaciology & Cryopedology, an affiliate to the CAS. A major in hydrogeology and engineering geology when studying in the Beijing College of Geology, Prof. Cheng started his life-long career of a permafrost specialist after having left the campus in 1965. His research work is almost entirely carried out on the Qinghai-Tibet Plateau, covering the following three aspects: 1. Contributions to several key engineering projects in permafrost regions. At present, China has not set up standardized norms for geological surveys, engineering design and construction
文摘Ai Guoxiang Professor Ai Guoxiang has been studying solar physics in Beijing Astronomic Observatory of the CAS since his graduation from the Department of Geophysics of Peking University in 1963.His main achievements in the field are as follows: 1.Promoting the development of measuring method of solar magnetic field for three times In 1966, he analyzed the development of instruments of solar physics over the past 400 years or so with the viewpoint of dialectical materialism,and proposed a concept on solar magnetic field telescope,which is a
文摘This article gives a systematic and comprehensive summary of the marine research results ac complished by the Chinese Academy of Sciences (CAS) with the support of the National High-tech Research and Development Program during the period of the Ninth Five-year Plan (1996 - 2000). It includes achievements in the exploitation of marine resources, protection of the marine environment, reduction of marine disasters and the safeguarding of national marine sovereignty.
文摘 Today in the 21st century, Science and technology (S&T)develops by leaps and bounds. Such progress has fundamentally changed the development pace of history, becoming the principal driving force for the progress of human civilization.……
文摘1 Students have many opportunities to meet their goals and be proud of their personal accomplishments throughout high school.A student might lead a sports team to victory,earn a high grade on a test or hold a new club activity.Sophomore Katie Limberg has writ⁃ten a novel.
文摘1 Nothing makes you feel quite so accomplished as slurping down a bowl of Chinese handmade noodles that you kneaded(揉),rolled,and cut from scratch.These deliciously chewy,springy noodles can be served in soup or mixed with whatever tasty sauces and toppings you can dream up for a delicious meal.But how to make handmade noodles?Here are some key tips.
文摘Top-level officials shared their views of regional economic and social development at the Third Session of the 11th National People’s Congress.Nur Bekri, Chairman of Xinjiang Uygur Autonomous
文摘Chinese Physics B(Chin.Phys.B),formerly titled Chinese Physics,is published monthly in English by the Chinese Physical Society(CPS)and IOP Publishing Ltd.It is an international academic journal,aiming to publish original papers and rapid communications reflecting creative and innovative achievements in physics worldwide,as well as review articles covering important accomplishments in frontiers of physics.The journal has been abstracted in international index systems including SCI and INSPEC.
文摘Chinese Physics B(Chin.Phys.B),formerly titled Chinese Physics,is published monthly in English by the Chinese Physical Society(CPS)and IOP Publishing Ltd.It is an international academic journal,aiming to publish original papers and rapid communications refecting creative and innovative achievements in physics worldwide,as well as review articles covering important accomplishments in frontiers of physics.The journal has been abstracted in international index systems including SCI and INSPEC.
基金supported by the National Natural Science Foundation of China(62274018)the Fundamental Research Funds for the Central Universities(2020CDJ-LHZZ-074)+4 种基金the Natural Science Foundation of Chongqing(cstc2020jcyj-msxmX0629)the Support Plan for Overseas Students to Return to China for Entrepreneurship and Innovation(cx2020003)L.Ding thanks the National Key Research and Development Program of China(2022YFB3803300)the open research fund of Songshan Lake Materials Laboratory(2021SLABFK02)the National Natural Science Foundation of China(21961160720).
文摘Single-junction and tandem perovskite solar cells(PSCs)have achieved impressive power conversion efficiencies(PCEs)of 25.7%and 31.3%,respectively,which makes it to be one of next-generation photovoltaic technologies[1−9].Inter-face engineering[3,5,10−12],composition engineering[13]and ad-ditive engineering[7,14,15]have made remarkable contribu-tions to efficiency enhancement.Compared with efficiency,the long-term operational stability of PSCs jogs along,which is far from the requirements of commercialization.Currently,almost all regular n-i-p PSCs were accomplished with classic-al organic hole-transport materials(HTMs),i.e.,PTAA[16]and spiro-OMeTAD[2,4,6].However,the highly efficient PSCs with the above organic hole-transport layers(HTL)usually suffer from instability.To facilitate hole transport and extraction,LiTF-SI and tBP are frequently employed to dope organic HTLs but this would sacrifice device stability.The use of these hygro-scopic p-dopants endows the devices with poor moisture sta-bility.
文摘The year 2022 marks the 50th anniversary of the establishment of diplomatic ties between China and New Zealand.Over the past half century,China-New Zealand relations have achieved many firsts and historic accomplishments.Among them,economic and trade cooperation has been the stabilizer of bilateral relations.With highly complementary economies,bilateral trade has increased from NZD 7 million to NZD 37.7 billion over the past 50 years.China has been New Zealand’s largest export market and source of imports for many consecutive years.
文摘It is truly remarkable to see the substantial progress that the African Union has achieved in implementing the Agenda 2063 in its initial decade from 2014 to 2023.This period has witnessed significant accomplishments that have laid the foundation for Africa’s development,collaboration,and strategic partnerships.
文摘Tourist's satisfaction degree is one of the important indexes to evaluate the service quality of scenic spot.Taking Xi'an Dongda Hot Spring Resort Area for an example,with the expectation difference theory and customers' satisfaction evaluation model as the theoretical basis of the research,the overall satisfaction degree of tourists to hot spring resort area,and the actual sensation accomplishments and the expectation difference of each service index were analyzed by using regression analysis and paired sample t test method.The results showed:① The overall satisfaction degree of tourists to the resort area was higher.There were remarkable correlation among three variables:the sensation value,the overall satisfaction degree,and the tourist's loyalty degree;② Generally,the sensation actual accomplishments of 15 service appraisal factors were higher than the expectation value.According to the characteristics,these 15 service appraisal factors were divided into 5 groups.Some unsatisfactory aspects were found out,and the corrective measures were put forward.
