随着育龄妇女的年龄的增大,其卵子的质量也随之下降。为了保证她们的生育质量,生育专家拟采取一项新的措施:The idea is to rejuvenate(使恢复青春活力)the aging eggs of an older woman using the "shell" of a youngerwoma...随着育龄妇女的年龄的增大,其卵子的质量也随之下降。为了保证她们的生育质量,生育专家拟采取一项新的措施:The idea is to rejuvenate(使恢复青春活力)the aging eggs of an older woman using the "shell" of a youngerwoman’s egg.具体言之,就是 to take the unfertilized egg of a younger womanand remove the nucleus.The nucleus of the older,infertile woman would be putinto this hollowed-out egg.当然,这种“似克隆,非克隆”的方法遇到的第一“障碍”便是法律。但是,the American Society of Reproductive Medicine的主席并不认为这是克隆,而且他似乎更多地看到了这种研究的价值所在:In essence whatthis is an attempt to do is improve the potential reproductive success of olderwomen.展开更多
African countries can learn a lot from China in their quest for modernisation,For China,modernisation is a journey of hardship and perseverance.In modern times,the Chinese people tried to adopt modernisation formulas ...African countries can learn a lot from China in their quest for modernisation,For China,modernisation is a journey of hardship and perseverance.In modern times,the Chinese people tried to adopt modernisation formulas from the West,but none worked.Through its own efforts,China has modernised under the leadership of the Communist Party of China.It has transformed from an impoverished and backward nation into the world’s second-largest economy,the largest trader in goods,and the largest exporter.展开更多
Aqueous zinc-ion batteries(AZIBs)have developed rapidly in recent years but still face several challenges,including zinc dendrites growth,hydrogen evolution reaction,passivation and corrosion.The pH of the electrolyte...Aqueous zinc-ion batteries(AZIBs)have developed rapidly in recent years but still face several challenges,including zinc dendrites growth,hydrogen evolution reaction,passivation and corrosion.The pH of the electrolyte plays a crucial role in these processes,significantly impacting the stability and reversibility of Zn^(2+)deposition.Therefore,pH-buffer tris(hydroxymethyl)amino methane(tris)is chosen as a versatile electrolyte additive to address these issues.Tris can buffer electrolyte pH at Zn/electrolyte interface by protonated/deprotonated nature of amino group,optimize the coordination environment of zinc solvate ions by its strong interaction with zinc ions,and simultaneously create an in-situ stable solid electrolyte interface membrane on the zinc anode surface.These synergistic effects effectively restrain dendrite formation and side reactions,resulting in a highly stable and reversible Zn anode,thereby enhancing the electrochemical performance of AZIBs.The Zn||Zn battery with 0.15 wt%tris additives maintains stable cycling for 1500 h at 4 mA·cm^(−2) and 1120 h at 10 mA·cm^(−2).Furthermore,the Coulombic efficiency reaches~99.2%at 4 mA·cm^(−2)@1 mAh·cm^(−2).The Zn||NVO full batteries also demonstrated a stable specific capacity and exceptional capacity retention.展开更多
Person Image Synthesis has been widely used in fashion with extensive application scenarios.The point of this task is how to synthesise person image from a single source image under arbitrary poses.Prior methods gener...Person Image Synthesis has been widely used in fashion with extensive application scenarios.The point of this task is how to synthesise person image from a single source image under arbitrary poses.Prior methods generate the person image with target pose well;however,they fail to preserve the fine style details of the source image.To address this problem,a robust style injection(RSI)model is proposed,which is a coarse-to-fine framework to synthesise target the person image.RSI develops a simple and efficient cross-attention based module to fuse the features of both source semantic styles and target pose for achieving the coarse aligned features.The adaptive instance normalisation is employed to enhance the aligned features in conjunction with source semantic styles.Subsequently,source semantic styles are further injected into the positional normalisation scheme to avoid the fine style details erosion caused by massive convolution.In training losses,optimal transport theory in the form of energy distance is introduced to constrain data distribution to refine the texture style details.Additionally,the authors’model is capable of editing the shape and texture of garments to the target style separately.The experiments demonstrate that the authors’RSI achieves better performance over the state-of-art methods.展开更多
Photoinduced molecular oxygen activation is crucial for artificial photosynthesis.However,metal-free semiconductor photocatalysts with high activation efficiency are still lacking up to now.Herein,two isomorphic tris(...Photoinduced molecular oxygen activation is crucial for artificial photosynthesis.However,metal-free semiconductor photocatalysts with high activation efficiency are still lacking up to now.Herein,two isomorphic tris(triazolo)triazine-based covalent organic frameworks were successfully constructed under solvothermal conditions.And they possess high crystallinity,inherent porosity with large surface area and good stability.Strong electron donor-acceptor skeletons expand the visible light harvesting,also facilitate the charge separation and thus lead to their superior activity of photoinduced molecular oxygen activation including photosynthesis of tetrahydroquinolines and hydrogen peroxide.This work provides a way to improve the efficiency of molecular oxygen activation through the rational design of COFs,and also opens new avenues for the construction of highly active and metal-free photocatalysts toward sustainable solar-to-chemical energy conversion.展开更多
As a potential candidate for high-energy lithium-ion batteries (LIBs),nickel-rich cathodes encounter significant challenges due to structural instability arising from interphases.In this work,tris(ethenyl)-tris(etheny...As a potential candidate for high-energy lithium-ion batteries (LIBs),nickel-rich cathodes encounter significant challenges due to structural instability arising from interphases.In this work,tris(ethenyl)-tris(ethenyl)silyloxysilane (HVDS) with Si–O bonds and unsaturated bonds is introduced as additive designing functional electrolyte to enhance the long-cycle stability of LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2)(NCM811)/graphite LIBs at elevated temperature.The preferential oxidization and component of HVDS facilitate the generation of an extremely robust and ultra-thin cathode electrolyte interphase (CEI) comprising a chemically bonded silane polymer.This interphase effectively suppresses side-reactions of electrolyte,mitigates HF erosion,and reduces irreversible phase transitions.Benefiting from the above merits,the batteries’capacity retention shows a remarkable increase from 20% to 92% after nearly 1550 cycles conducted at room temperature.And under elevated temperature conditions (45℃),the capacity retention remains 80%after 670 cycles,in comparison to a drop to 80%after only 250 cycles with the blank electrolyte.These findings highlight HVDS’s potential to functionalize the electrolyte,marking a breakthrough in improving the longevity and reliability of NCM811/graphite LIBs under challenging conditions.展开更多
文摘随着育龄妇女的年龄的增大,其卵子的质量也随之下降。为了保证她们的生育质量,生育专家拟采取一项新的措施:The idea is to rejuvenate(使恢复青春活力)the aging eggs of an older woman using the "shell" of a youngerwoman’s egg.具体言之,就是 to take the unfertilized egg of a younger womanand remove the nucleus.The nucleus of the older,infertile woman would be putinto this hollowed-out egg.当然,这种“似克隆,非克隆”的方法遇到的第一“障碍”便是法律。但是,the American Society of Reproductive Medicine的主席并不认为这是克隆,而且他似乎更多地看到了这种研究的价值所在:In essence whatthis is an attempt to do is improve the potential reproductive success of olderwomen.
文摘African countries can learn a lot from China in their quest for modernisation,For China,modernisation is a journey of hardship and perseverance.In modern times,the Chinese people tried to adopt modernisation formulas from the West,but none worked.Through its own efforts,China has modernised under the leadership of the Communist Party of China.It has transformed from an impoverished and backward nation into the world’s second-largest economy,the largest trader in goods,and the largest exporter.
基金supported by the Fund of Xuzhou Science and Technology Key R&D Program(Social Development)Project(No.KC22289)the Postgraduate Research&Practice Innovation Program of Jiangsu Province(No.KYCX22_2783).
文摘Aqueous zinc-ion batteries(AZIBs)have developed rapidly in recent years but still face several challenges,including zinc dendrites growth,hydrogen evolution reaction,passivation and corrosion.The pH of the electrolyte plays a crucial role in these processes,significantly impacting the stability and reversibility of Zn^(2+)deposition.Therefore,pH-buffer tris(hydroxymethyl)amino methane(tris)is chosen as a versatile electrolyte additive to address these issues.Tris can buffer electrolyte pH at Zn/electrolyte interface by protonated/deprotonated nature of amino group,optimize the coordination environment of zinc solvate ions by its strong interaction with zinc ions,and simultaneously create an in-situ stable solid electrolyte interface membrane on the zinc anode surface.These synergistic effects effectively restrain dendrite formation and side reactions,resulting in a highly stable and reversible Zn anode,thereby enhancing the electrochemical performance of AZIBs.The Zn||Zn battery with 0.15 wt%tris additives maintains stable cycling for 1500 h at 4 mA·cm^(−2) and 1120 h at 10 mA·cm^(−2).Furthermore,the Coulombic efficiency reaches~99.2%at 4 mA·cm^(−2)@1 mAh·cm^(−2).The Zn||NVO full batteries also demonstrated a stable specific capacity and exceptional capacity retention.
基金National Natural Science Foundation of China,Grant/Award Number:62176124。
文摘Person Image Synthesis has been widely used in fashion with extensive application scenarios.The point of this task is how to synthesise person image from a single source image under arbitrary poses.Prior methods generate the person image with target pose well;however,they fail to preserve the fine style details of the source image.To address this problem,a robust style injection(RSI)model is proposed,which is a coarse-to-fine framework to synthesise target the person image.RSI develops a simple and efficient cross-attention based module to fuse the features of both source semantic styles and target pose for achieving the coarse aligned features.The adaptive instance normalisation is employed to enhance the aligned features in conjunction with source semantic styles.Subsequently,source semantic styles are further injected into the positional normalisation scheme to avoid the fine style details erosion caused by massive convolution.In training losses,optimal transport theory in the form of energy distance is introduced to constrain data distribution to refine the texture style details.Additionally,the authors’model is capable of editing the shape and texture of garments to the target style separately.The experiments demonstrate that the authors’RSI achieves better performance over the state-of-art methods.
文摘Photoinduced molecular oxygen activation is crucial for artificial photosynthesis.However,metal-free semiconductor photocatalysts with high activation efficiency are still lacking up to now.Herein,two isomorphic tris(triazolo)triazine-based covalent organic frameworks were successfully constructed under solvothermal conditions.And they possess high crystallinity,inherent porosity with large surface area and good stability.Strong electron donor-acceptor skeletons expand the visible light harvesting,also facilitate the charge separation and thus lead to their superior activity of photoinduced molecular oxygen activation including photosynthesis of tetrahydroquinolines and hydrogen peroxide.This work provides a way to improve the efficiency of molecular oxygen activation through the rational design of COFs,and also opens new avenues for the construction of highly active and metal-free photocatalysts toward sustainable solar-to-chemical energy conversion.
基金financially supported by the Scientific Research Innovation Project of Graduate School of South China Normal University (No. 2024KYLX081)。
文摘As a potential candidate for high-energy lithium-ion batteries (LIBs),nickel-rich cathodes encounter significant challenges due to structural instability arising from interphases.In this work,tris(ethenyl)-tris(ethenyl)silyloxysilane (HVDS) with Si–O bonds and unsaturated bonds is introduced as additive designing functional electrolyte to enhance the long-cycle stability of LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2)(NCM811)/graphite LIBs at elevated temperature.The preferential oxidization and component of HVDS facilitate the generation of an extremely robust and ultra-thin cathode electrolyte interphase (CEI) comprising a chemically bonded silane polymer.This interphase effectively suppresses side-reactions of electrolyte,mitigates HF erosion,and reduces irreversible phase transitions.Benefiting from the above merits,the batteries’capacity retention shows a remarkable increase from 20% to 92% after nearly 1550 cycles conducted at room temperature.And under elevated temperature conditions (45℃),the capacity retention remains 80%after 670 cycles,in comparison to a drop to 80%after only 250 cycles with the blank electrolyte.These findings highlight HVDS’s potential to functionalize the electrolyte,marking a breakthrough in improving the longevity and reliability of NCM811/graphite LIBs under challenging conditions.
