Openness is a hallmark of Chinese modernization.China has established 22 free trade zones(FTZs)nationwide,specific areas where businesses enjoy preferential policies to promote international trade,each with distinct d...Openness is a hallmark of Chinese modernization.China has established 22 free trade zones(FTZs)nationwide,specific areas where businesses enjoy preferential policies to promote international trade,each with distinct development goals and strategic orientations.Among them,the China(Fujian)Pilot FTZ in the country’s southeastern province of Fujian is strategically positioned to serve as a comprehensive reform testing ground that integrates openness and innovation,a model zone for deepening cross-Straits economic cooperation,and a hub for fostering open collaboration with countries along the Maritime Silk Road.As a key subsection of the Fujian FTZ,the Xiamen Area of China(Fujian)Pilot Free Trade Zone(XMFTZ)leverages its geographical advantages to advance international logistics,spearhead institutional innovations,and promote industrial development in alignment with these strategic goals.展开更多
8 May 2012, Budapest -- ZTE Corporation announced that Hungarian Minister of Economics, Gy^irgy Matolcsy, and ZTE senior vice president, Zhu Jinyun have signed an agreement to cooperate on the establishment of ZTE＇s ...8 May 2012, Budapest -- ZTE Corporation announced that Hungarian Minister of Economics, Gy^irgy Matolcsy, and ZTE senior vice president, Zhu Jinyun have signed an agreement to cooperate on the establishment of ZTE＇s new European Regional Network Operation Center in Budapest.展开更多
The world’s biggest luxury brands have their eyes set on the Chinese consumer - a strategy that is reaping profits. In the next few months,the British fashion house Burberry will expand its retail space in China to c...The world’s biggest luxury brands have their eyes set on the Chinese consumer - a strategy that is reaping profits. In the next few months,the British fashion house Burberry will expand its retail space in China to capitalize on strong Chinese consumer demand for luxury products.Already,sales in China have contributed 4 percent to展开更多
Bifunctional electrocatalyst is crucial to boost the performance of a zinc-air battery.Alternative electrocatalysts beyond noble metals are highly desirable to lower the energy barriers for oxygen reduction and evolut...Bifunctional electrocatalyst is crucial to boost the performance of a zinc-air battery.Alternative electrocatalysts beyond noble metals are highly desirable to lower the energy barriers for oxygen reduction and evolution reactions in a zinc-air battery,while maintaining the good stability in the harsh alkaline electrolyte.展开更多
Shaanxi province serves as an important part in the Belt and Road cooperation,which is also at the forefront of China’s westward opening up.It also shoulders the significant missions of implementing national strategi...Shaanxi province serves as an important part in the Belt and Road cooperation,which is also at the forefront of China’s westward opening up.It also shoulders the significant missions of implementing national strategies including the ecological protection and high-quality development of the Yellow River Basin and the Western Region Development Strategy.展开更多
Around 11:30 a.m.on a sunny day in July 2024,four students participated in a ceremony in the Huangpu District of Guangzhou,south China’s Guangdong Province,in which they received drone-delivered packages.It was the h...Around 11:30 a.m.on a sunny day in July 2024,four students participated in a ceremony in the Huangpu District of Guangzhou,south China’s Guangdong Province,in which they received drone-delivered packages.It was the herald of China’s postal service history,jumping from snail mail into the ranks of drone delivery.The four students had been sent letters in distinctive red envelopes by the South China University of Technology in the city,informing them that their application for admission had been accepted.展开更多
On July 18,the Resolution of the Central Committee of the Communist Party of China on Further Deepening Reform Comprehensively to Advance Chinese Modernization was adopted at the third plenary session of the 20th CPC ...On July 18,the Resolution of the Central Committee of the Communist Party of China on Further Deepening Reform Comprehensively to Advance Chinese Modernization was adopted at the third plenary session of the 20th CPC Central Committee.The 22,000-character document sent a clear signal of China’s commitment to deepening reform and expanding high-standard opening up,which will exert a positive and farreaching impact on China-ASEAN economic and trade relations in the next stage.展开更多
(TobeContinued)"Don’t get dirty!"was once a constant family refrain,as parents despairingly watched their children spoil their best clothes.Whether they were running through farmers’fields,climbing trees o...(TobeContinued)"Don’t get dirty!"was once a constant family refrain,as parents despairingly watched their children spoil their best clothes.Whether they were running through farmers’fields,climbing trees or catching tadpoles,it was inevitable that children’s whites would turn brown before the day was over.展开更多
Most surprisingly,friendly bugs from nature can even moderate the body's response to stress.When we feel vulnerable and threatened,the immune system starts raising bodily inflammation.Since inflammation is one of ...Most surprisingly,friendly bugs from nature can even moderate the body's response to stress.When we feel vulnerable and threatened,the immune system starts raising bodily inflammation.Since inflammation is one of the first defences against infection,this response evolved as a way of preparing the body for a potential physical injury from the threat we were facing-but it's less useful for the kinds of stresses most people face today.展开更多
Zurich,Switzerland,5 September 2022–The time is right for Swiss textile machinery companies to grow their export business with Indonesia–one of the world’s top 10 textile producers.A free trade agreement between th...Zurich,Switzerland,5 September 2022–The time is right for Swiss textile machinery companies to grow their export business with Indonesia–one of the world’s top 10 textile producers.A free trade agreement between the two countries came into force in 2021,and market analyses show that there is scope for a significant increase in business in textile and textile machinery sectors.This was the background to a successful symposium in the Indonesian capital Jakarta last month when Swiss Textile Machinery Association members presented their products and innovations to an invited audience of 200 delegates from Indonesian textile companies.展开更多
1.Wind energy Wind is a kind of clean,pollution-free and renewable energy with great potential.Wind power generation refers to the use of wind turbines to convert wind energy into electricity directly.Among the variou...1.Wind energy Wind is a kind of clean,pollution-free and renewable energy with great potential.Wind power generation refers to the use of wind turbines to convert wind energy into electricity directly.Among the various forms of wind energy utilization,wind power generation is the main form of wind energy utilization,and it is also one of the most mature technologies,the most profitable prospects of renewable energy.展开更多
针对Boost变换器存在多种干扰和电子元件具有非整数阶特性的问题,提出了一种分数阶PID(fractional order PID,FOPID)电压外环-分数阶滑模控制器(fractional order sliding mode control,FOSMC)电流内环双闭环控制系统。首先,利用Oustal...针对Boost变换器存在多种干扰和电子元件具有非整数阶特性的问题,提出了一种分数阶PID(fractional order PID,FOPID)电压外环-分数阶滑模控制器(fractional order sliding mode control,FOSMC)电流内环双闭环控制系统。首先,利用Oustaloup算法对电感和电容进行7阶拟合,得到分数阶电路模型;其次,设计了微积分阶次可调的FOPID,并将其作为电压外环的控制器;然后,设计扩张状态观测器(extended state observer,ESO)对系统状态、负载扰动和输入扰动进行估计;最后,基于ESO的估计值,用FOPID作为滑模面构建了FOSMC。结果表明,与其他控制算法相比,FOPID-FOSMC双闭环控制策略结合了电压外环的稳态调节能力和电流内环的快速响应能力,实现了对Boost变换器输出电压和电流的双重优化控制,具有更快的响应速度、更小的超调量、更短的恢复时间和更好的稳定性与鲁棒性。展开更多
为了进一步解决基于电容-二极管(capacitance-diode,CD)升压单元的两相交错并联Boost高增益变换器存在的开关管数量多、输入输出不共地问题,提出了一种基于CD单元的新型3L型两相交错并联Boost变换器拓扑的构建方法,并根据在第3个升压电...为了进一步解决基于电容-二极管(capacitance-diode,CD)升压单元的两相交错并联Boost高增益变换器存在的开关管数量多、输入输出不共地问题,提出了一种基于CD单元的新型3L型两相交错并联Boost变换器拓扑的构建方法,并根据在第3个升压电感前级和后级引入CD单元数量的不同,推演出基于FN-BMCD单元的3L型高增益Boost变换器的演化规律;以F2-B1CD单元的3L型Boost变换器为例,详细分析了5个开关模态的工作原理,揭示了各电感及电容寄生参数对电压增益的影响机理;搭建由数字信号处理(digital signal processing,DSP)芯片和实时仿真机组成的控制在环半实物仿真实验平台,验证了所提新型变换器拓扑理论分析的正确性。展开更多
精确评估电池的荷电状态(state of charge,SOC)是实现高效储能电池管理的前提。当前利用阻抗估计电池SOC多基于非原位电化学阻抗谱,由于此技术要求充分的静置时间,使得通过阻抗动态估计电池SOC困难。考虑到储能电站的实际运行情况,实时...精确评估电池的荷电状态(state of charge,SOC)是实现高效储能电池管理的前提。当前利用阻抗估计电池SOC多基于非原位电化学阻抗谱,由于此技术要求充分的静置时间,使得通过阻抗动态估计电池SOC困难。考虑到储能电站的实际运行情况,实时快速地获取阻抗数据成为关键。然而工况下受到直流偏置影响,电池电压的非线性变化会导致中低频阻抗产生偏移,影响阻抗测量准确性。针对以上问题,该研究采用离散间隔二进制序列设计了一种动态电化学阻抗谱测量方法,结合电池充放电工况下的阻抗特性,引入Categorical Boosting算法构建了电池SOC估计模型。针对4块商用18650锂电池,在不同温度和充放电倍率下每隔1%SOC重复测量了电池在充放电过程中的动态阻抗。实验结果表明,在不同实验条件下,电池充放电工况下SOC估计的最大平均绝对误差和均方根误差分别为2.98%和3.59%,证明了所提方法的可靠性和鲁棒性。展开更多
In the past few years,organic–inorganic/inorganic lead halide perovskites,most notably CH3NH3Pb I3and its mixed cation/anion compounds,have attracted tremendous research interests in a wide range of different discipl...In the past few years,organic–inorganic/inorganic lead halide perovskites,most notably CH3NH3Pb I3and its mixed cation/anion compounds,have attracted tremendous research interests in a wide range of different disciplines,which is largely initialized by their unprecedented success in low-cost and highly efficient solar cells.With certified efficiencies of over 22%in the lab-scale devices,展开更多
文摘Openness is a hallmark of Chinese modernization.China has established 22 free trade zones(FTZs)nationwide,specific areas where businesses enjoy preferential policies to promote international trade,each with distinct development goals and strategic orientations.Among them,the China(Fujian)Pilot FTZ in the country’s southeastern province of Fujian is strategically positioned to serve as a comprehensive reform testing ground that integrates openness and innovation,a model zone for deepening cross-Straits economic cooperation,and a hub for fostering open collaboration with countries along the Maritime Silk Road.As a key subsection of the Fujian FTZ,the Xiamen Area of China(Fujian)Pilot Free Trade Zone(XMFTZ)leverages its geographical advantages to advance international logistics,spearhead institutional innovations,and promote industrial development in alignment with these strategic goals.
文摘8 May 2012, Budapest -- ZTE Corporation announced that Hungarian Minister of Economics, Gy^irgy Matolcsy, and ZTE senior vice president, Zhu Jinyun have signed an agreement to cooperate on the establishment of ZTE＇s new European Regional Network Operation Center in Budapest.
文摘The world’s biggest luxury brands have their eyes set on the Chinese consumer - a strategy that is reaping profits. In the next few months,the British fashion house Burberry will expand its retail space in China to capitalize on strong Chinese consumer demand for luxury products.Already,sales in China have contributed 4 percent to
文摘Bifunctional electrocatalyst is crucial to boost the performance of a zinc-air battery.Alternative electrocatalysts beyond noble metals are highly desirable to lower the energy barriers for oxygen reduction and evolution reactions in a zinc-air battery,while maintaining the good stability in the harsh alkaline electrolyte.
文摘Shaanxi province serves as an important part in the Belt and Road cooperation,which is also at the forefront of China’s westward opening up.It also shoulders the significant missions of implementing national strategies including the ecological protection and high-quality development of the Yellow River Basin and the Western Region Development Strategy.
文摘Around 11:30 a.m.on a sunny day in July 2024,four students participated in a ceremony in the Huangpu District of Guangzhou,south China’s Guangdong Province,in which they received drone-delivered packages.It was the herald of China’s postal service history,jumping from snail mail into the ranks of drone delivery.The four students had been sent letters in distinctive red envelopes by the South China University of Technology in the city,informing them that their application for admission had been accepted.
文摘On July 18,the Resolution of the Central Committee of the Communist Party of China on Further Deepening Reform Comprehensively to Advance Chinese Modernization was adopted at the third plenary session of the 20th CPC Central Committee.The 22,000-character document sent a clear signal of China’s commitment to deepening reform and expanding high-standard opening up,which will exert a positive and farreaching impact on China-ASEAN economic and trade relations in the next stage.
文摘(TobeContinued)"Don’t get dirty!"was once a constant family refrain,as parents despairingly watched their children spoil their best clothes.Whether they were running through farmers’fields,climbing trees or catching tadpoles,it was inevitable that children’s whites would turn brown before the day was over.
文摘Most surprisingly,friendly bugs from nature can even moderate the body's response to stress.When we feel vulnerable and threatened,the immune system starts raising bodily inflammation.Since inflammation is one of the first defences against infection,this response evolved as a way of preparing the body for a potential physical injury from the threat we were facing-but it's less useful for the kinds of stresses most people face today.
文摘Zurich,Switzerland,5 September 2022–The time is right for Swiss textile machinery companies to grow their export business with Indonesia–one of the world’s top 10 textile producers.A free trade agreement between the two countries came into force in 2021,and market analyses show that there is scope for a significant increase in business in textile and textile machinery sectors.This was the background to a successful symposium in the Indonesian capital Jakarta last month when Swiss Textile Machinery Association members presented their products and innovations to an invited audience of 200 delegates from Indonesian textile companies.
文摘1.Wind energy Wind is a kind of clean,pollution-free and renewable energy with great potential.Wind power generation refers to the use of wind turbines to convert wind energy into electricity directly.Among the various forms of wind energy utilization,wind power generation is the main form of wind energy utilization,and it is also one of the most mature technologies,the most profitable prospects of renewable energy.
文摘针对Boost变换器存在多种干扰和电子元件具有非整数阶特性的问题,提出了一种分数阶PID(fractional order PID,FOPID)电压外环-分数阶滑模控制器(fractional order sliding mode control,FOSMC)电流内环双闭环控制系统。首先,利用Oustaloup算法对电感和电容进行7阶拟合,得到分数阶电路模型;其次,设计了微积分阶次可调的FOPID,并将其作为电压外环的控制器;然后,设计扩张状态观测器(extended state observer,ESO)对系统状态、负载扰动和输入扰动进行估计;最后,基于ESO的估计值,用FOPID作为滑模面构建了FOSMC。结果表明,与其他控制算法相比,FOPID-FOSMC双闭环控制策略结合了电压外环的稳态调节能力和电流内环的快速响应能力,实现了对Boost变换器输出电压和电流的双重优化控制,具有更快的响应速度、更小的超调量、更短的恢复时间和更好的稳定性与鲁棒性。
文摘为了进一步解决基于电容-二极管(capacitance-diode,CD)升压单元的两相交错并联Boost高增益变换器存在的开关管数量多、输入输出不共地问题,提出了一种基于CD单元的新型3L型两相交错并联Boost变换器拓扑的构建方法,并根据在第3个升压电感前级和后级引入CD单元数量的不同,推演出基于FN-BMCD单元的3L型高增益Boost变换器的演化规律;以F2-B1CD单元的3L型Boost变换器为例,详细分析了5个开关模态的工作原理,揭示了各电感及电容寄生参数对电压增益的影响机理;搭建由数字信号处理(digital signal processing,DSP)芯片和实时仿真机组成的控制在环半实物仿真实验平台,验证了所提新型变换器拓扑理论分析的正确性。
文摘精确评估电池的荷电状态(state of charge,SOC)是实现高效储能电池管理的前提。当前利用阻抗估计电池SOC多基于非原位电化学阻抗谱,由于此技术要求充分的静置时间,使得通过阻抗动态估计电池SOC困难。考虑到储能电站的实际运行情况,实时快速地获取阻抗数据成为关键。然而工况下受到直流偏置影响,电池电压的非线性变化会导致中低频阻抗产生偏移,影响阻抗测量准确性。针对以上问题,该研究采用离散间隔二进制序列设计了一种动态电化学阻抗谱测量方法,结合电池充放电工况下的阻抗特性,引入Categorical Boosting算法构建了电池SOC估计模型。针对4块商用18650锂电池,在不同温度和充放电倍率下每隔1%SOC重复测量了电池在充放电过程中的动态阻抗。实验结果表明,在不同实验条件下,电池充放电工况下SOC估计的最大平均绝对误差和均方根误差分别为2.98%和3.59%,证明了所提方法的可靠性和鲁棒性。
文摘In the past few years,organic–inorganic/inorganic lead halide perovskites,most notably CH3NH3Pb I3and its mixed cation/anion compounds,have attracted tremendous research interests in a wide range of different disciplines,which is largely initialized by their unprecedented success in low-cost and highly efficient solar cells.With certified efficiencies of over 22%in the lab-scale devices,
