We construct two conical surfaces which take non-coplanar lines as generatrix and rational Bezier curve as ridge-line, and prove that the intersecting line of conical surface has similar properties to Bezier curve. Th...We construct two conical surfaces which take non-coplanar lines as generatrix and rational Bezier curve as ridge-line, and prove that the intersecting line of conical surface has similar properties to Bezier curve. Then, the smoothly blending of two cylinders whose axes are non-coplanar is realized by taking intersecting line of conical surface as axes.展开更多
The facilities of 50 kl/a TDI unit at the North Jinghua Polyurethane Company in Liaoning province have been operating smoothly and safely for 158 h to deliver 500 tons of first-grade TDI products.The construction of t...The facilities of 50 kl/a TDI unit at the North Jinghua Polyurethane Company in Liaoning province have been operating smoothly and safely for 158 h to deliver 500 tons of first-grade TDI products.The construction of this project has incarnated that the North Jinghua Polyurethane Company has completely mastered the TDI production technique.展开更多
At 8:30 on October 27, the first international flight from Shanghai to Singapore MU576 took off at Pudong Airport. Thus,all international flights and those to Hong Kong and Macao were all moved to Pudong Airport. Besi...At 8:30 on October 27, the first international flight from Shanghai to Singapore MU576 took off at Pudong Airport. Thus,all international flights and those to Hong Kong and Macao were all moved to Pudong Airport. Besides internationalflights and Hong Kong and Macao flights, the eastward moving also cover some domestic flights, namely flights fromSanya, Haikou, Guangzhou, Shenzhen, Zhuhai, Qingdao, Yantai, Weihai, Weifang and so on in Northwest China, Mid-South China,and East China to Shanghai. After the eastward moving, the flight distribution at two airports in Shanghai changed greatly.展开更多
In 2009, the nuclear power plants under China National Nuclear Corporation (CNNC) continuously kept reliable operation. CNNC's seven nuclear power units accumulatively generated 38.25
Since CAS is charged with the key task of carrying out strategic, fundamental and forward-looking studies for this country, it is incumbent upon CAS scientists to take an active part in the National Program for the De...Since CAS is charged with the key task of carrying out strategic, fundamental and forward-looking studies for this country, it is incumbent upon CAS scientists to take an active part in the National Program for the Development of Western China. This is also an important part of the national Knowledge Innovation Program (KIP) spearheaded by CAS. Over the past two years, CAS has made a series of remarkable advances in Western China with regard to the development of research bases, exploration of crucial scientific problems, the training of talented people, and providing consultation services for decision makers.With the furtherance of the national drive to develop the country's western region, CAS will step up its efforts and increase its funding, to make more and greater contributions to the overall development of the region.展开更多
On 27th November 2018,Wuhan National Biosafety Laboratory of the Chinese Academy of Sciences(hereinafter referred to as“Wuhan P4 Laboratory”)was smoothly checked and accepted by the acceptance group organized by Chi...On 27th November 2018,Wuhan National Biosafety Laboratory of the Chinese Academy of Sciences(hereinafter referred to as“Wuhan P4 Laboratory”)was smoothly checked and accepted by the acceptance group organized by Chinese Academy of Sciences(CAS).More than 20 experts from CAS,National Natural Science Foundation of China,China National Accreditation Service for Conformity Assessment(CNAS).展开更多
The hydrological system in Central Asia is highly sensitive to global climate change,significantly affecting water supply and energy production.In Tajikistan,the Vakhsh River—one of the main tributaries of the Amu Da...The hydrological system in Central Asia is highly sensitive to global climate change,significantly affecting water supply and energy production.In Tajikistan,the Vakhsh River—one of the main tributaries of the Amu Darya—plays a key role in the region’s hydropower and irrigation.However,research on long-term hydrological changes in its two top large basins—the Surkhob and Khingov river basins—remains limited.Therefore,this study analyzed long-term climate and hydrological changes in the Vakhsh River,including its main tributaries—the Surkhob and Khingov rivers—which are vital for the water resource management in Tajikistan and even in Central Asia.Using long-term hydrometeorological observations,the change trends of temperature(1933–2020),precipitation(1970–2020),and runoff(1940–2018)were examined to assess the impact of climate change on the regional water resources.The analysis revealed the occurrence of significant warming and a spatially uneven increase in precipitation.The temperature changes across three climatic periods(1933–1960,1960–1990,and 1990–2020)indicated that there was a transition from baseline level to accelerated warming.The precipitation showed a 2.99 mm/a increase in the Khingov River Basin and a 2.80 mm/a increase in the Surkhob River Basin during 1970–2020.Moreover,there was a gradual shift toward wetter conditions in recent decades.Despite the relatively stable annual mean runoff,seasonal redistribution occurred,with increased runoff in spring and reduced runoff in summer,due to the compensation of glacier melting.Moreover,this study forecasted runoff change during 2019–2040 using the exponential triple smoothing(ETS)method and revealed the occurrence of alternating wet and dry phases,emphasizing the sensitivity of the Vakhsh River Basin’s hydrological system to climate change and the necessity of adaptive water resource management in mountainous regions of Central Asia.Therefore,this study can provide evidence-based insights that are critical for future water resources planning,climate-resilient hydropower development,and regional adaptation strategies in climate-vulnerable basins in Central Asia.展开更多
Shanghang County,the mining base of Fujian,The RMB540 million Qinghai Xiyu 100,000-ton Lead Smelter Project is running smoothly,with equipment installation and debugging currently underway.It is expected to be put int...Shanghang County,the mining base of Fujian,The RMB540 million Qinghai Xiyu 100,000-ton Lead Smelter Project is running smoothly,with equipment installation and debugging currently underway.It is expected to be put intooperation at the end of this year.展开更多
The Shanghai Airport Group Company has set up a headquarters to command a project to refurbish Pudong and Hongqiao airports. Construction on Pudong Airport will be completed by the end of 2007, while that on Hongqiao ...The Shanghai Airport Group Company has set up a headquarters to command a project to refurbish Pudong and Hongqiao airports. Construction on Pudong Airport will be completed by the end of 2007, while that on Hongqiao Airport will be finished by the end of 2009.展开更多
Aluminum and copper are main raw materials in manufacturing of condenser & evaporator for refrigerator. In 2011, in order to sieve the initiatives, condenser & evaporator manufacturers began to muscle into ...Aluminum and copper are main raw materials in manufacturing of condenser & evaporator for refrigerator. In 2011, in order to sieve the initiatives, condenser & evaporator manufacturers began to muscle into the upstream fields of manufacturing of aluminum and copper refrigeration components. Replacement of copper by aluminum went smoothly in展开更多
Sichuan Huaying Chemical Co., Ltd.(Huaying Chemical), a subsidiaryof Sichuan Chemical Holdings (Group) Co., Ltd., recently announcedthat the construction of its 10 000 t/a glyphosate renovation projectimplemented smoo...Sichuan Huaying Chemical Co., Ltd.(Huaying Chemical), a subsidiaryof Sichuan Chemical Holdings (Group) Co., Ltd., recently announcedthat the construction of its 10 000 t/a glyphosate renovation projectimplemented smoothly.With a total investment of RMB235 million, the project mainlyincludes 10 000 t/a glyphosate unit, 15 000 t/a PMIDA (N-phosphonomethyl iminodiacetic acid) unit, 5 800 t/a phosphorousacid unit and matching facilities, and construction on the project wasstarted in Chengdu of Sichuan province in March 2009.The construction period of the project is around 8 months, and aftercompletion of the project, the annual sales revenue will be added byRMB350 million for the company and Huaying Chemical will becomethe largest glyphosate manufacturer in Sichuan province.Huaying Chemical, Located in Chengdu of Sichuan province, engages in the production and sales of insecticides, fungicides andherbicides.展开更多
As of January 8th,construction on the 1.2 million t/a potassium sulfate fertilizer project,which was started in September 2006,went on smoothly.The contractor - Xinjiang
CAC Group Co.,Ltd.(CAC)recently announced that the constructionof the 100 000 t/a PMIDA(N-phosphonomethyl iminodiacetic acid)project implemented smoothly.Construction on the project was started in Suining,Sichuanprovi...CAC Group Co.,Ltd.(CAC)recently announced that the constructionof the 100 000 t/a PMIDA(N-phosphonomethyl iminodiacetic acid)project implemented smoothly.Construction on the project was started in Suining,Sichuanprovince on November 18th,2008.展开更多
文摘We construct two conical surfaces which take non-coplanar lines as generatrix and rational Bezier curve as ridge-line, and prove that the intersecting line of conical surface has similar properties to Bezier curve. Then, the smoothly blending of two cylinders whose axes are non-coplanar is realized by taking intersecting line of conical surface as axes.
文摘The facilities of 50 kl/a TDI unit at the North Jinghua Polyurethane Company in Liaoning province have been operating smoothly and safely for 158 h to deliver 500 tons of first-grade TDI products.The construction of this project has incarnated that the North Jinghua Polyurethane Company has completely mastered the TDI production technique.
文摘At 8:30 on October 27, the first international flight from Shanghai to Singapore MU576 took off at Pudong Airport. Thus,all international flights and those to Hong Kong and Macao were all moved to Pudong Airport. Besides internationalflights and Hong Kong and Macao flights, the eastward moving also cover some domestic flights, namely flights fromSanya, Haikou, Guangzhou, Shenzhen, Zhuhai, Qingdao, Yantai, Weihai, Weifang and so on in Northwest China, Mid-South China,and East China to Shanghai. After the eastward moving, the flight distribution at two airports in Shanghai changed greatly.
文摘In 2009, the nuclear power plants under China National Nuclear Corporation (CNNC) continuously kept reliable operation. CNNC's seven nuclear power units accumulatively generated 38.25
文摘Since CAS is charged with the key task of carrying out strategic, fundamental and forward-looking studies for this country, it is incumbent upon CAS scientists to take an active part in the National Program for the Development of Western China. This is also an important part of the national Knowledge Innovation Program (KIP) spearheaded by CAS. Over the past two years, CAS has made a series of remarkable advances in Western China with regard to the development of research bases, exploration of crucial scientific problems, the training of talented people, and providing consultation services for decision makers.With the furtherance of the national drive to develop the country's western region, CAS will step up its efforts and increase its funding, to make more and greater contributions to the overall development of the region.
文摘On 27th November 2018,Wuhan National Biosafety Laboratory of the Chinese Academy of Sciences(hereinafter referred to as“Wuhan P4 Laboratory”)was smoothly checked and accepted by the acceptance group organized by Chinese Academy of Sciences(CAS).More than 20 experts from CAS,National Natural Science Foundation of China,China National Accreditation Service for Conformity Assessment(CNAS).
基金supported by the National Natural Science Foundation of China(W2412135).
文摘The hydrological system in Central Asia is highly sensitive to global climate change,significantly affecting water supply and energy production.In Tajikistan,the Vakhsh River—one of the main tributaries of the Amu Darya—plays a key role in the region’s hydropower and irrigation.However,research on long-term hydrological changes in its two top large basins—the Surkhob and Khingov river basins—remains limited.Therefore,this study analyzed long-term climate and hydrological changes in the Vakhsh River,including its main tributaries—the Surkhob and Khingov rivers—which are vital for the water resource management in Tajikistan and even in Central Asia.Using long-term hydrometeorological observations,the change trends of temperature(1933–2020),precipitation(1970–2020),and runoff(1940–2018)were examined to assess the impact of climate change on the regional water resources.The analysis revealed the occurrence of significant warming and a spatially uneven increase in precipitation.The temperature changes across three climatic periods(1933–1960,1960–1990,and 1990–2020)indicated that there was a transition from baseline level to accelerated warming.The precipitation showed a 2.99 mm/a increase in the Khingov River Basin and a 2.80 mm/a increase in the Surkhob River Basin during 1970–2020.Moreover,there was a gradual shift toward wetter conditions in recent decades.Despite the relatively stable annual mean runoff,seasonal redistribution occurred,with increased runoff in spring and reduced runoff in summer,due to the compensation of glacier melting.Moreover,this study forecasted runoff change during 2019–2040 using the exponential triple smoothing(ETS)method and revealed the occurrence of alternating wet and dry phases,emphasizing the sensitivity of the Vakhsh River Basin’s hydrological system to climate change and the necessity of adaptive water resource management in mountainous regions of Central Asia.Therefore,this study can provide evidence-based insights that are critical for future water resources planning,climate-resilient hydropower development,and regional adaptation strategies in climate-vulnerable basins in Central Asia.
文摘Shanghang County,the mining base of Fujian,The RMB540 million Qinghai Xiyu 100,000-ton Lead Smelter Project is running smoothly,with equipment installation and debugging currently underway.It is expected to be put intooperation at the end of this year.
文摘The Shanghai Airport Group Company has set up a headquarters to command a project to refurbish Pudong and Hongqiao airports. Construction on Pudong Airport will be completed by the end of 2007, while that on Hongqiao Airport will be finished by the end of 2009.
文摘Aluminum and copper are main raw materials in manufacturing of condenser & evaporator for refrigerator. In 2011, in order to sieve the initiatives, condenser & evaporator manufacturers began to muscle into the upstream fields of manufacturing of aluminum and copper refrigeration components. Replacement of copper by aluminum went smoothly in
文摘Sichuan Huaying Chemical Co., Ltd.(Huaying Chemical), a subsidiaryof Sichuan Chemical Holdings (Group) Co., Ltd., recently announcedthat the construction of its 10 000 t/a glyphosate renovation projectimplemented smoothly.With a total investment of RMB235 million, the project mainlyincludes 10 000 t/a glyphosate unit, 15 000 t/a PMIDA (N-phosphonomethyl iminodiacetic acid) unit, 5 800 t/a phosphorousacid unit and matching facilities, and construction on the project wasstarted in Chengdu of Sichuan province in March 2009.The construction period of the project is around 8 months, and aftercompletion of the project, the annual sales revenue will be added byRMB350 million for the company and Huaying Chemical will becomethe largest glyphosate manufacturer in Sichuan province.Huaying Chemical, Located in Chengdu of Sichuan province, engages in the production and sales of insecticides, fungicides andherbicides.
文摘As of January 8th,construction on the 1.2 million t/a potassium sulfate fertilizer project,which was started in September 2006,went on smoothly.The contractor - Xinjiang
文摘CAC Group Co.,Ltd.(CAC)recently announced that the constructionof the 100 000 t/a PMIDA(N-phosphonomethyl iminodiacetic acid)project implemented smoothly.Construction on the project was started in Suining,Sichuanprovince on November 18th,2008.
