Statistics shed light on a tremendous imbalance inherent inChina’s urbanization process.Secondary and tertiary industriesmake up the lion’s share of GDP with figures of48.9%and39.4%respectively,while the primary ind...Statistics shed light on a tremendous imbalance inherent inChina’s urbanization process.Secondary and tertiary industriesmake up the lion’s share of GDP with figures of48.9%and39.4%respectively,while the primary industry only accounts for11.7%.By this measure,China can be said to be an industrializedcountry,or at least to have entered the intermediate phase ofindustrialization.In terms of demographic composition,展开更多
According to the reliable data of sixteen CNC lathes, each reliable index of the serial CNC lathes is evaluated before tackling and after tackling. According to the failure analysis, reliable improvement measures of t...According to the reliable data of sixteen CNC lathes, each reliable index of the serial CNC lathes is evaluated before tackling and after tackling. According to the failure analysis, reliable improvement measures of the serial CNC lathes are put forward.展开更多
The endangerment of aeolian sand is one of the most serious eco-environmental problems facing the southern suburb of Beijing. To control wind erosion is thus a matter of great urgency. This paper chooses typical land-...The endangerment of aeolian sand is one of the most serious eco-environmental problems facing the southern suburb of Beijing. To control wind erosion is thus a matter of great urgency. This paper chooses typical land-use types, i.e., cultivated land, wild grassland, drifting sandy land, etc. based on the fixed experimental observation and quantitative analysis, to conduct studies on the principles and characteristics of aeolian activities and measures controlling wind erosion in Daxing District of Beijing, The results show that： the near ground wind velocity yielded the logarithmic distribution with height; there are significant differences among different ground cover roughness; there are significant differences in the corresponding friction velocities caused by different properties of the underlying surface; there are differences in the threshold wind velocities speed in different land .use types; and there are minus exponential relations between the sediment discharge percentage and the height at a range of 0-20 cm air flow layer, Different land use types result in various degrees of coarse component. There is a significant exponential relation between sediment transport concentration and wind velocity.展开更多
This issue of Virologica Sinica is to celebrate the 100th anniversary of the discovery of "filterable lytic factor" or "bacteriophage"(1915-2015).During the past 100 years,both basic knowledge and ...This issue of Virologica Sinica is to celebrate the 100th anniversary of the discovery of "filterable lytic factor" or "bacteriophage"(1915-2015).During the past 100 years,both basic knowledge and applications of bacteriophages have been substantially explored and developed.In recent years,bacteriophage research is booming and holding the hope展开更多
The International Council for Applied Mineralogy Congress(ICAM)is the most important regular gathering of applied mineralogists.The ICAM2013,to be held at Southwest University of Science and Technology (SWUST)in Miany...The International Council for Applied Mineralogy Congress(ICAM)is the most important regular gathering of applied mineralogists.The ICAM2013,to be held at Southwest University of Science and Technology (SWUST)in Mianyang,China,on07-10July,is our 11th meeting.It has been 32 years since the inaugural meeting in Johannesburg,South Africa in1981and this decenary event perhaps heralds a new era for Applied Mineralogy as we tackle a whole new set of challenges facing our world today.At our last展开更多
There is chaos in the Gulf region. Saudi Arabia in conjunction with the United Arab Emirates, Bahrain, Egypt and other gulf countries,suddenly cut off diplomatic relations with Qatar expelling diplomats and citizens, ...There is chaos in the Gulf region. Saudi Arabia in conjunction with the United Arab Emirates, Bahrain, Egypt and other gulf countries,suddenly cut off diplomatic relations with Qatar expelling diplomats and citizens, exerting blockades on land, sea and aviation on June 5, 2017, with the excuse that Qatar supports terrorism- and damages regional security. Sandi Arabia and other gulf countries have issued an ultimatum on June 23, giving Qatar to 10 days to meet their 13 requirements. For a time, the Saudi-led group became the media hot word. The Gulf, once a rare peaceful land under the impact of the Arab Spring, now falls into chaos. The GCC in fact has split. This is another major diplomatic adventure that Saudi Arabia has taken in recent years.展开更多
In recent years,Xinjiang Uygur Autonomous Region has taken comprehensive measures to tackle poverty.These efforts have yielded tangible benefits to people of all ethnic groups living in the autonomous region.
1.The problem The term'concussion'refers to a common form of traumatic brain injury,which typically occurs after a blow or injury to the head.It has been described as a'complex pathophysiological process a...1.The problem The term'concussion'refers to a common form of traumatic brain injury,which typically occurs after a blow or injury to the head.It has been described as a'complex pathophysiological process affecting the brain,induced by biomechanical factors',and shear forces induced by rotational acceleration are believed to be the primary mechanism of injury in concussion.~1The incidence of concussion in the UK has been shown to be展开更多
古人曰:文武之道,一张一弛。生活需要娱乐,毫无疑问,垂钓(gonngling)也是一种娱乐。钓鱼需要准备渔具(fishing tackle):钓竿(fishing rod)、钓丝(fishing line)、钓钩(fish-hook)及钓饵(bait),有时还需准备个铅锤(sinker),以便钓丝能沉...古人曰:文武之道,一张一弛。生活需要娱乐,毫无疑问,垂钓(gonngling)也是一种娱乐。钓鱼需要准备渔具(fishing tackle):钓竿(fishing rod)、钓丝(fishing line)、钓钩(fish-hook)及钓饵(bait),有时还需准备个铅锤(sinker),以便钓丝能沉入水中。备好渔具,挑个风和日丽的口子,就可去海边或湖边钓鱼了。这又分两种:用线钓鱼(line fishing)和用网捕鱼(net fishing)。用钓丝钓鱼的人被称为 angler,用网捕鱼的人则为 fisherman。用钓丝钓鱼时,先需将饵料置于钓钩上,然后将钓竿放进水里,鱼从水底浮上来,游到有食饵的地方,英语为 rise to the bait。如:I could seethe fish on the bottom of thc riverk,but none of them would rise to the bait.展开更多
Although global governance was not a widely recognizable concept until the end of the Cold War,its practice can be traced back to the history of international relations as some of the countries had the experience in s...Although global governance was not a widely recognizable concept until the end of the Cold War,its practice can be traced back to the history of international relations as some of the countries had the experience in solving common problems through transnational coordination.At present,"profound changes unseen for a century"call for more effective common solution on the global plane.展开更多
Sensitive and fast detection of ibuprofen( Ibu) in an aquatic environment often requires costly, time-consuming and sophisticated techniques. To tackle those limitations,a novel android smartphone application was deve...Sensitive and fast detection of ibuprofen( Ibu) in an aquatic environment often requires costly, time-consuming and sophisticated techniques. To tackle those limitations,a novel android smartphone application was developed based on a colorimetric analysis method using unmodified gold nanoparticles( AuNPs)aptamer probes to quantitatively detect Ibu. Under optimal conditions,it could detect Ibu as low as 0. 25 ng/mL with high selectivity. The determination of Ibu in real water samples was also carried out to confirm the practicability of the application.展开更多
Climate change is a challenge faced by the whole humanity.As the world's largest developing country, China attaches great importance to climate change and has taken effective measures to address climate change iss...Climate change is a challenge faced by the whole humanity.As the world's largest developing country, China attaches great importance to climate change and has taken effective measures to address climate change issues despite its tremendous task to develop economy, eliminate poverty and improve people's livelihood.展开更多
The poor households with profiles and cards are the important objects of the targeted poverty alleviation. The supporting work of the students with profiles and cards in colleges and universities is an important part ...The poor households with profiles and cards are the important objects of the targeted poverty alleviation. The supporting work of the students with profiles and cards in colleges and universities is an important part of the poverty alleviation in education. The university support should not only maintain in the economic and material support, but should also pay more attention to each student as the pillar of the socialist modernization in China, to fundamentally block the intergenerational transmission of the students with profiles and cards and their families. In fact, the path is to build up the supporting concept of the growth and development based on the students with cards and profiles, build a three-dimensional identification path, and establish and improve the tracking and evaluation mechanisms for the targeted funding.展开更多
The morning of November 4, 2018 witnessed the inauguration of an organization of organizations in Beijing:over 40 national,regional and international scientific and research institutions vowed to act in synergy to dea...The morning of November 4, 2018 witnessed the inauguration of an organization of organizations in Beijing:over 40 national,regional and international scientific and research institutions vowed to act in synergy to deal with common challenges facing'Belt and Road'(B&R) region countries with science,technology and innovation (STI).Initiated by the Chinese Academy of Sciences (CAS)。展开更多
文摘Statistics shed light on a tremendous imbalance inherent inChina’s urbanization process.Secondary and tertiary industriesmake up the lion’s share of GDP with figures of48.9%and39.4%respectively,while the primary industry only accounts for11.7%.By this measure,China can be said to be an industrializedcountry,or at least to have entered the intermediate phase ofindustrialization.In terms of demographic composition,
文摘According to the reliable data of sixteen CNC lathes, each reliable index of the serial CNC lathes is evaluated before tackling and after tackling. According to the failure analysis, reliable improvement measures of the serial CNC lathes are put forward.
基金The national "Tenth-Five Year Plan" Key Program of Science and Technology, No.2002BA517A14 Beijing Sand Desertification and Wind Sand Countermeasure Demonstration Area Project, No.H020720110330 Key Project of Natural Science Foundation of Beijing, No.8011003
文摘The endangerment of aeolian sand is one of the most serious eco-environmental problems facing the southern suburb of Beijing. To control wind erosion is thus a matter of great urgency. This paper chooses typical land-use types, i.e., cultivated land, wild grassland, drifting sandy land, etc. based on the fixed experimental observation and quantitative analysis, to conduct studies on the principles and characteristics of aeolian activities and measures controlling wind erosion in Daxing District of Beijing, The results show that： the near ground wind velocity yielded the logarithmic distribution with height; there are significant differences among different ground cover roughness; there are significant differences in the corresponding friction velocities caused by different properties of the underlying surface; there are differences in the threshold wind velocities speed in different land .use types; and there are minus exponential relations between the sediment discharge percentage and the height at a range of 0-20 cm air flow layer, Different land use types result in various degrees of coarse component. There is a significant exponential relation between sediment transport concentration and wind velocity.
文摘This issue of Virologica Sinica is to celebrate the 100th anniversary of the discovery of "filterable lytic factor" or "bacteriophage"(1915-2015).During the past 100 years,both basic knowledge and applications of bacteriophages have been substantially explored and developed.In recent years,bacteriophage research is booming and holding the hope
文摘The International Council for Applied Mineralogy Congress(ICAM)is the most important regular gathering of applied mineralogists.The ICAM2013,to be held at Southwest University of Science and Technology (SWUST)in Mianyang,China,on07-10July,is our 11th meeting.It has been 32 years since the inaugural meeting in Johannesburg,South Africa in1981and this decenary event perhaps heralds a new era for Applied Mineralogy as we tackle a whole new set of challenges facing our world today.At our last
文摘There is chaos in the Gulf region. Saudi Arabia in conjunction with the United Arab Emirates, Bahrain, Egypt and other gulf countries,suddenly cut off diplomatic relations with Qatar expelling diplomats and citizens, exerting blockades on land, sea and aviation on June 5, 2017, with the excuse that Qatar supports terrorism- and damages regional security. Sandi Arabia and other gulf countries have issued an ultimatum on June 23, giving Qatar to 10 days to meet their 13 requirements. For a time, the Saudi-led group became the media hot word. The Gulf, once a rare peaceful land under the impact of the Arab Spring, now falls into chaos. The GCC in fact has split. This is another major diplomatic adventure that Saudi Arabia has taken in recent years.
文摘In recent years,Xinjiang Uygur Autonomous Region has taken comprehensive measures to tackle poverty.These efforts have yielded tangible benefits to people of all ethnic groups living in the autonomous region.
文摘1.The problem The term'concussion'refers to a common form of traumatic brain injury,which typically occurs after a blow or injury to the head.It has been described as a'complex pathophysiological process affecting the brain,induced by biomechanical factors',and shear forces induced by rotational acceleration are believed to be the primary mechanism of injury in concussion.~1The incidence of concussion in the UK has been shown to be
文摘古人曰:文武之道,一张一弛。生活需要娱乐,毫无疑问,垂钓(gonngling)也是一种娱乐。钓鱼需要准备渔具(fishing tackle):钓竿(fishing rod)、钓丝(fishing line)、钓钩(fish-hook)及钓饵(bait),有时还需准备个铅锤(sinker),以便钓丝能沉入水中。备好渔具,挑个风和日丽的口子,就可去海边或湖边钓鱼了。这又分两种:用线钓鱼(line fishing)和用网捕鱼(net fishing)。用钓丝钓鱼的人被称为 angler,用网捕鱼的人则为 fisherman。用钓丝钓鱼时,先需将饵料置于钓钩上,然后将钓竿放进水里,鱼从水底浮上来,游到有食饵的地方,英语为 rise to the bait。如:I could seethe fish on the bottom of thc riverk,but none of them would rise to the bait.
文摘Although global governance was not a widely recognizable concept until the end of the Cold War,its practice can be traced back to the history of international relations as some of the countries had the experience in solving common problems through transnational coordination.At present,"profound changes unseen for a century"call for more effective common solution on the global plane.
基金National Natural Science Foundation of China(No.21377023)
文摘Sensitive and fast detection of ibuprofen( Ibu) in an aquatic environment often requires costly, time-consuming and sophisticated techniques. To tackle those limitations,a novel android smartphone application was developed based on a colorimetric analysis method using unmodified gold nanoparticles( AuNPs)aptamer probes to quantitatively detect Ibu. Under optimal conditions,it could detect Ibu as low as 0. 25 ng/mL with high selectivity. The determination of Ibu in real water samples was also carried out to confirm the practicability of the application.
文摘Climate change is a challenge faced by the whole humanity.As the world's largest developing country, China attaches great importance to climate change and has taken effective measures to address climate change issues despite its tremendous task to develop economy, eliminate poverty and improve people's livelihood.
文摘The poor households with profiles and cards are the important objects of the targeted poverty alleviation. The supporting work of the students with profiles and cards in colleges and universities is an important part of the poverty alleviation in education. The university support should not only maintain in the economic and material support, but should also pay more attention to each student as the pillar of the socialist modernization in China, to fundamentally block the intergenerational transmission of the students with profiles and cards and their families. In fact, the path is to build up the supporting concept of the growth and development based on the students with cards and profiles, build a three-dimensional identification path, and establish and improve the tracking and evaluation mechanisms for the targeted funding.
文摘The morning of November 4, 2018 witnessed the inauguration of an organization of organizations in Beijing:over 40 national,regional and international scientific and research institutions vowed to act in synergy to deal with common challenges facing'Belt and Road'(B&R) region countries with science,technology and innovation (STI).Initiated by the Chinese Academy of Sciences (CAS)。
