Objective: To observe the effect of electroacupuncture (EA) on learning and memory abilities and ultrastructure of synapses in CA3 region of the hippocampus in vascular dementia (VD) rats. Methods: A total of 32 SD ra...Objective: To observe the effect of electroacupuncture (EA) on learning and memory abilities and ultrastructure of synapses in CA3 region of the hippocampus in vascular dementia (VD) rats. Methods: A total of 32 SD rats were randomized into control (sham-operation, n=7), model (n=7), EA (n=9) and medication (n=9) groups. VD model was established by occlusion of the bilateral vertebral arteries (electrocoagulation) and bilateral common carotid arteries (occlusion for 5 min and reperfusion for 10 min , repeated the procedure for 3 times to induce global ischemia). EA ( 150 Hz , 1 mA ) was applied to “Baihui”(百会 GV 20), “Geshu”(膈俞 BL 17), “Pishu”(脾俞 BL 20) and “Shenshu”(肾俞 BL 23) for 20 min , once daily and continuously for 15 days. In medication group, the rats were fed with Nimotong (12 mg/kg), once daily and continuously for 15 days. Morris water maze method was used to test the animals’ learning and memory abilities (latencies to find the hidden platform determined by place navigation trials, and latencies to cross on the location of the removed platform determined by spatial probe trials) after the treatment. Ultrastructural changes (numerical density, N_A,surface density, Sv and volume density, Vv) of Gray type 1 synapses in CA3 region of the hippocampus were observed by using transmission electronic microscope and automatic image analysis system. Results: 1) Place navigation test showed that in comparison with control group, the average escape latency of VD group was significantly longer (P<0.01), while in comparison with VD group, the latencies of both EA and medication groups decreased significantly (P<0.01). No significant difference was found between EA and medication groups in the escape latency (P>0.05). 2) Spatial probe-test displayed that in comparison with control group, the times which the animals crossed the target platform in VD group decreased significantly (P<0.01), while compared with VD group, those of both EA and medication groups increased considerably (P<0.01). No significant differences were found between EA and medication groups in the times for rats to cross the target quadrant and among the 4 groups in the times for rats to cross the other quadrants. 3) Compared with control group, N_A, Sv, and Vv of VD group decreased significantly (P<0.01), while in comparison with VD group, the 3 indexes of both EA and medication groups increased significantly (P<0.01), no significant differences were found between EA and medication groups in these 3 indexes (P>0.05). Conclusion: EA can restrain the loss of Gray type Ⅰsynapses in CA3 region of the hippocampus to improve learning and memory abilities in VD rats.展开更多
It is shoum that the time-dependent intensity of an ultraehort laser puIse can recovered from the second-order correlation G^((2))(τ) and tthe third-order correlation with aingle time-delay G^((3))(τ).The recovery i...It is shoum that the time-dependent intensity of an ultraehort laser puIse can recovered from the second-order correlation G^((2))(τ) and tthe third-order correlation with aingle time-delay G^((3))(τ).The recovery is successfully carnied out by a computer with ingenious progrorming.展开更多
Utilization of ceramic wastes to fabricate concrete can not only effectively dispose the wastes,but also reduce the energy and source consumptions.Therefore,we fabricated a green ultra high performance concrete using ...Utilization of ceramic wastes to fabricate concrete can not only effectively dispose the wastes,but also reduce the energy and source consumptions.Therefore,we fabricated a green ultra high performance concrete using ceramic waste powder(CWP)to replace 55%of cement,and ceramic waste aggregate(CWA)to replace 100%natural quartz sand.However,high content of ceramic wastes will harm the concrete performance including workability and mechanical properties.Therefore,a low-cost and low carbon nano-calcium carbonate(NC)was introduced to compensate for the defects caused by large amounts of CWP and CWA to workability and mechanical behavior.The experimental results show that the workability of ultra high performance concrete with large amounts of CWP and CWA(UHPCLCC)increases by 28.57%with NC content of 5%.Moreover,the flexural strengths,fracture energy,compressive strengths,and compressive toughness of UHPCLCC increase up to 29.6%,56.5%,20.4%,and 37.6%,respectively,which is caused by the nano-core effect of NC.展开更多
At Yangpu Port on the northwestern tip of Hainan Island,towering quay cranes are lined in neat rows, hoisting containers on and off cargo vessels in constant motion.“Today, half of the international ships we pilot ar...At Yangpu Port on the northwestern tip of Hainan Island,towering quay cranes are lined in neat rows, hoisting containers on and off cargo vessels in constant motion.“Today, half of the international ships we pilot are ultra-large vessels over 200meters in length,” said Lin Hongpin,head of the Yangpu branch of Hainan Provincial Ship Pilot Station. Since the launch of the island-wide special customs operations, port throughput has continued to climb, with pilotage services for such large ships rising by nearly 20 percent year on year.展开更多
On a summer morning in Boqiang Village,tucked beneath the emerald mountains of Fanshi County,Shanxi Province,the Ultra Trail Mount Wutai2025 commenced with the sound of the starting pistol-an event that was much more ...On a summer morning in Boqiang Village,tucked beneath the emerald mountains of Fanshi County,Shanxi Province,the Ultra Trail Mount Wutai2025 commenced with the sound of the starting pistol-an event that was much more than just a competition.As soon as the colorful smoke bombs lit up the sky,some2,000 runners from China and abroad set off to reach one of the country's most sacred Buddhist peaks.Over the past decade,this race has become a fixture on the global running calendar and a symbol of the growing popularity of endurance sports.展开更多
Understanding the complex plasma dynamics in ultra-intense relativistic laser-solid interactions is of fundamental importance for applications of laser-plasma-based particle accelerators,the creation of high-energy-de...Understanding the complex plasma dynamics in ultra-intense relativistic laser-solid interactions is of fundamental importance for applications of laser-plasma-based particle accelerators,the creation of high-energy-density matter,understanding planetary science,and laser-driven fusion energy.However,experimental efforts in this regime have been limited by the lack of accessibility of over-critical densities and the poor spatiotemporal resolution of conventional diagnostics.Over the last decade,the advent of femtosecond brilliant hard X-ray free-electron lasers(XFELs)has opened new horizons to overcome these limitations.Here,for the first time,we present full-scale spatiotemporal measurements of solid-density plasma dynamics,including preplasma generation with tens of nanometer scale length driven by the leading edge of a relativistic laser pulse,ultrafast heating and ionization at the main pulse arrival,the laser-driven blast wave,and transient surface return current-induced compression dynamics up to hundreds of picoseconds after interaction.These observations are enabled by utilizing a novel combination of advanced X-ray diagnostics including small-angle X-ray scattering,resonant X-ray emission spectroscopy,and propagation-based X-ray phase-contrast imaging simultaneously at the European XFEL-HED beamline station.展开更多
Objectives:Acquired resistance to paclitaxel represents a critical barrier to the effective chemotherapy of non-small cell lung cancer(NSCLC).The present study aimed to elucidate the molecular and pharmacological mech...Objectives:Acquired resistance to paclitaxel represents a critical barrier to the effective chemotherapy of non-small cell lung cancer(NSCLC).The present study aimed to elucidate the molecular and pharmacological mechanisms promoting paclitaxel resistance in NSCLC and to explore potential strategies for overcoming this resistance.Methods:Here,we report an integrated pharmacological and analytical approach to quantify paclitaxel disposition and overcome resistance in a A549/TAX cell model(paclitaxel-resistant A549 cells).Results:Cell counting kit-8(CCK-8)assay,colony formation,and apoptosis assays confirmed that A549/TAX cells exhibited marked resistance to paclitaxel relative to parental A549 cells.Based on transcriptome profiling by RNA sequencing analysis and validation by western blotting assay,we found that the expression of the ATP-binding cassette subfamily B member 1(ABCB1)(the encoded protein is termed P-glycoprotein)was significantly upregulated in resistant cells.By using ultra performance liquid chromatography-tandem mass spectrometry(UPLC-MS/MS),we demonstrated that ABCB1 overexpression promotes enhanced efflux of intracellular paclitaxel,thereby lowering its cytotoxic accumulation.Genetic silencing of ABCB1 or pharmacological inhibition with the specific P-glycoprotein modulator elacridar or tariquidar restored intracellular paclitaxel levels,as determined by UPLC-MS/MS,and synergistically decreased cell viability as observed in CCK-8 assay.Conclusion:These findings reveal that the ABCB1-mediated drug efflux is a crucial mechanism underlying paclitaxel resistance in NSCLC cells,with UPLC-MS/MS serving as a sensitive analytical method to detect paclitaxel concentration.Inhibition of ABCB1 is a promising therapeutic strategy to resensitize resistant tumor cells to paclitaxel.展开更多
The use of antibacterial dressings is crucial in the prevention and treatment of wound infection in emergency sit-uations.However,the efficacy of dressings is compromised by long-term storage or exposure to harsh cond...The use of antibacterial dressings is crucial in the prevention and treatment of wound infection in emergency sit-uations.However,the efficacy of dressings is compromised by long-term storage or exposure to harsh conditions.Here,an ultrastable in-situ silver nanoparticle dressing(AgSNP@CD)was prepared for effective prevention and treatment of wound infection in emergency.The fabrication process of AgSNP@CD is simple,suitable for large-scale production.Due to the strong interaction between the in-situ synthesized AgNPs and the cotton fabric,AgSNP@CD owned remarkable stability,thus retaining its antimicrobial efficacy even after long-term storage(up to 2 years)and under extreme conditions(damp heat,low temperatures,low-oxygen,water immersion,acid-alkali erosion).Both in vitro and in vivo results demonstrated the extraordinary antibacterial efficacy and stability of AgSNP@CD,facilitating infection prevention and wound healing in extreme conditions.In particular,AgSNP@CD exhibited a superior treatment effect on severe bacteria-infected trauma and can prevent the occur-rence of sepsis effectively.The exceptional stability and antibacterial efficacy of AgSNP@CD under complex and extreme conditions make it a well-suited dressing strategy for the prevention and treatment of wound infection in emergency.展开更多
The fast growth of mobile autonomous machines from traditional equipment to unmanned autonomous vehicles has fueled the demand for accurate and reliable localization solutions in diverse application domains.Ultra Wide...The fast growth of mobile autonomous machines from traditional equipment to unmanned autonomous vehicles has fueled the demand for accurate and reliable localization solutions in diverse application domains.Ultra Wide Band(UWB)technology has emerged as a promising candidate for addressing this need,offering high precision,immunity to multipath interference,and robust performance in challenging environments.In this comprehensive survey,we systematically explore UWB-based localization for mobile autonomous machines,spanning from fundamental principles to future trends.To the best of our knowledge,this review paper stands as the pioneer in systematically dissecting the algorithms of UWB-based localization for mobile autonomous machines,covering a spectrum from bottom-ranging schemes to advanced sensor fusion,error mitigation,and optimization techniques.By synthesizing existing knowledge,evaluating current methodologies,and highlighting future trends,this review aims to catalyze progress and innovation in the field,unlocking new opportunities for mobile autonomous machine applications across diverse industries and domains.Thus,it serves as a valuable resource for researchers,practitioners,and stakeholders interested in advancing the state-of-the-art UWB-based localization for mobile autonomous machines.展开更多
Traditional metals often exhibit a trade-offbetween strength and plasticity,limiting their wide application of metals in aerospace,transportation,energy industry and other fields[1-3].In order to overcome this dilemma...Traditional metals often exhibit a trade-offbetween strength and plasticity,limiting their wide application of metals in aerospace,transportation,energy industry and other fields[1-3].In order to overcome this dilemma,high-entropy alloys(HEAs),proposed by Yeh et al.and Cantor et al.,are currently of great interest in the materials community due to their excellent mechanical properties[4-7].To further promote the wide application of HEAs in industrial production,Lu et al.developed a new eutectic high-entropy alloy(EHEAs)by combining the potential advantages of traditional eutectic alloys and HEAs[8-11].展开更多
The active development of space industry necessitates the cre-ation of novel materials with unique properties,including shape memory alloys(SMAs).The development of ultra-high temperature SMAs(UHTSMAs)with operating t...The active development of space industry necessitates the cre-ation of novel materials with unique properties,including shape memory alloys(SMAs).The development of ultra-high temperature SMAs(UHTSMAs)with operating temperatures above 400℃is a significant challenge[1-3].It is known that reversible thermoelas-tic martensitic transformation(MT)is the basis for shape mem-ory behavior[4].Currently,there are several systems in which MT temperatures meet the above requirements,for example,RuNb[5],HfPd[6],TiPd[7].展开更多
In 2024,China’s natural gas industry continues to show a positive trend.In the field of exploration and development,a large ultra-deep water and ultra-shallow gas field has been discovered,further enhancing the uniqu...In 2024,China’s natural gas industry continues to show a positive trend.In the field of exploration and development,a large ultra-deep water and ultra-shallow gas field has been discovered,further enhancing the unique deep-water complex oil and gas exploration and development technology system independently developed by China.Remarkable achievements have been made in offshore development,including the commissioning of Deep Sea No.1 PhaseⅡ,the first deep-water high-pressure gas field.Additionally,the establishment of the Daji gas field,the first onshore coal rock gas field with an oil and gas equivalent of one million tons,provides strong support for domestic natural gas production.In terms of infrastructure construction,the entire China-Russia east-route natural gas pipeline has been completed,the Xinjiang section of the West Fourth Line is now operational,the Southern Xinjiang Gas Pipeline project has been fully launched,and five new or expanded LNG receiving terminals have been added,increasing the annual receiving capacity by 21.10 million tons.In the field of related equipment manufacturing,China successfully delivered the first vessel of its largest LNG transportation ship construction project,the Greenergy Ocean,and successfully launched its first large-scale floating natural gas liquefaction facility,the NGUYA FLNG.In terms of market supply and demand,natural gas consumption exceeded 400 billion m^(3) for the first time,with apparent consumption reaching 412.43 billion m^(3),an increase of 24.9 billion m^(3) year-on-year,reflecting a growth rate of 6.4%.The total supply reached 424.3 billion m^(3),an increase of 27.5 billion m^(3) year-on-year,with a growth rate of 7.5%.In terms of regulatory policy,China has once again issued a natural gas utilization policy aimed at further guiding the orderly and efficient development of the natural gas market.展开更多
文摘Objective: To observe the effect of electroacupuncture (EA) on learning and memory abilities and ultrastructure of synapses in CA3 region of the hippocampus in vascular dementia (VD) rats. Methods: A total of 32 SD rats were randomized into control (sham-operation, n=7), model (n=7), EA (n=9) and medication (n=9) groups. VD model was established by occlusion of the bilateral vertebral arteries (electrocoagulation) and bilateral common carotid arteries (occlusion for 5 min and reperfusion for 10 min , repeated the procedure for 3 times to induce global ischemia). EA ( 150 Hz , 1 mA ) was applied to “Baihui”(百会 GV 20), “Geshu”(膈俞 BL 17), “Pishu”(脾俞 BL 20) and “Shenshu”(肾俞 BL 23) for 20 min , once daily and continuously for 15 days. In medication group, the rats were fed with Nimotong (12 mg/kg), once daily and continuously for 15 days. Morris water maze method was used to test the animals’ learning and memory abilities (latencies to find the hidden platform determined by place navigation trials, and latencies to cross on the location of the removed platform determined by spatial probe trials) after the treatment. Ultrastructural changes (numerical density, N_A,surface density, Sv and volume density, Vv) of Gray type 1 synapses in CA3 region of the hippocampus were observed by using transmission electronic microscope and automatic image analysis system. Results: 1) Place navigation test showed that in comparison with control group, the average escape latency of VD group was significantly longer (P<0.01), while in comparison with VD group, the latencies of both EA and medication groups decreased significantly (P<0.01). No significant difference was found between EA and medication groups in the escape latency (P>0.05). 2) Spatial probe-test displayed that in comparison with control group, the times which the animals crossed the target platform in VD group decreased significantly (P<0.01), while compared with VD group, those of both EA and medication groups increased considerably (P<0.01). No significant differences were found between EA and medication groups in the times for rats to cross the target quadrant and among the 4 groups in the times for rats to cross the other quadrants. 3) Compared with control group, N_A, Sv, and Vv of VD group decreased significantly (P<0.01), while in comparison with VD group, the 3 indexes of both EA and medication groups increased significantly (P<0.01), no significant differences were found between EA and medication groups in these 3 indexes (P>0.05). Conclusion: EA can restrain the loss of Gray type Ⅰsynapses in CA3 region of the hippocampus to improve learning and memory abilities in VD rats.
文摘It is shoum that the time-dependent intensity of an ultraehort laser puIse can recovered from the second-order correlation G^((2))(τ) and tthe third-order correlation with aingle time-delay G^((3))(τ).The recovery is successfully carnied out by a computer with ingenious progrorming.
基金Funded by the National Science Foundation of China(No.52368031)the China Postdoctoral Science Foundation(No.2022M713497)+1 种基金the Jiangxi Provincial Natural Science Foundation(No.20252BAC250115)the Jiangxi Provincial Department of Transportation Science and Technology Project(No.2022H0017)。
文摘Utilization of ceramic wastes to fabricate concrete can not only effectively dispose the wastes,but also reduce the energy and source consumptions.Therefore,we fabricated a green ultra high performance concrete using ceramic waste powder(CWP)to replace 55%of cement,and ceramic waste aggregate(CWA)to replace 100%natural quartz sand.However,high content of ceramic wastes will harm the concrete performance including workability and mechanical properties.Therefore,a low-cost and low carbon nano-calcium carbonate(NC)was introduced to compensate for the defects caused by large amounts of CWP and CWA to workability and mechanical behavior.The experimental results show that the workability of ultra high performance concrete with large amounts of CWP and CWA(UHPCLCC)increases by 28.57%with NC content of 5%.Moreover,the flexural strengths,fracture energy,compressive strengths,and compressive toughness of UHPCLCC increase up to 29.6%,56.5%,20.4%,and 37.6%,respectively,which is caused by the nano-core effect of NC.
文摘At Yangpu Port on the northwestern tip of Hainan Island,towering quay cranes are lined in neat rows, hoisting containers on and off cargo vessels in constant motion.“Today, half of the international ships we pilot are ultra-large vessels over 200meters in length,” said Lin Hongpin,head of the Yangpu branch of Hainan Provincial Ship Pilot Station. Since the launch of the island-wide special customs operations, port throughput has continued to climb, with pilotage services for such large ships rising by nearly 20 percent year on year.
文摘On a summer morning in Boqiang Village,tucked beneath the emerald mountains of Fanshi County,Shanxi Province,the Ultra Trail Mount Wutai2025 commenced with the sound of the starting pistol-an event that was much more than just a competition.As soon as the colorful smoke bombs lit up the sky,some2,000 runners from China and abroad set off to reach one of the country's most sacred Buddhist peaks.Over the past decade,this race has become a fixture on the global running calendar and a symbol of the growing popularity of endurance sports.
基金funding from Grant No. HIDSS-0002 DASHH (Data Science in Hamburg-Helmholtz Graduate School for the Structure of Matter)partially supported by the Helmholtz Imaging platform through the project “Smart Phase.”
文摘Understanding the complex plasma dynamics in ultra-intense relativistic laser-solid interactions is of fundamental importance for applications of laser-plasma-based particle accelerators,the creation of high-energy-density matter,understanding planetary science,and laser-driven fusion energy.However,experimental efforts in this regime have been limited by the lack of accessibility of over-critical densities and the poor spatiotemporal resolution of conventional diagnostics.Over the last decade,the advent of femtosecond brilliant hard X-ray free-electron lasers(XFELs)has opened new horizons to overcome these limitations.Here,for the first time,we present full-scale spatiotemporal measurements of solid-density plasma dynamics,including preplasma generation with tens of nanometer scale length driven by the leading edge of a relativistic laser pulse,ultrafast heating and ionization at the main pulse arrival,the laser-driven blast wave,and transient surface return current-induced compression dynamics up to hundreds of picoseconds after interaction.These observations are enabled by utilizing a novel combination of advanced X-ray diagnostics including small-angle X-ray scattering,resonant X-ray emission spectroscopy,and propagation-based X-ray phase-contrast imaging simultaneously at the European XFEL-HED beamline station.
基金supported by grants from the National Natural Science Foundation of China(Grant No.82172840)Gusu Health Talents Project of Suzhou Municipal Health Commission(Grant Nos.GSWS2023007 and GSWS2022062)+2 种基金Suzhou Science and Technology Development Plan Project(Grant No.SYW2024005)Chinese Pharmaceutical Association Hospital Pharmacy Department(Grant No.CPA-Z05-ZC-2024002)Jiangsu Research Hospital Association for Precision Medication(Grant No.JY202202).
文摘Objectives:Acquired resistance to paclitaxel represents a critical barrier to the effective chemotherapy of non-small cell lung cancer(NSCLC).The present study aimed to elucidate the molecular and pharmacological mechanisms promoting paclitaxel resistance in NSCLC and to explore potential strategies for overcoming this resistance.Methods:Here,we report an integrated pharmacological and analytical approach to quantify paclitaxel disposition and overcome resistance in a A549/TAX cell model(paclitaxel-resistant A549 cells).Results:Cell counting kit-8(CCK-8)assay,colony formation,and apoptosis assays confirmed that A549/TAX cells exhibited marked resistance to paclitaxel relative to parental A549 cells.Based on transcriptome profiling by RNA sequencing analysis and validation by western blotting assay,we found that the expression of the ATP-binding cassette subfamily B member 1(ABCB1)(the encoded protein is termed P-glycoprotein)was significantly upregulated in resistant cells.By using ultra performance liquid chromatography-tandem mass spectrometry(UPLC-MS/MS),we demonstrated that ABCB1 overexpression promotes enhanced efflux of intracellular paclitaxel,thereby lowering its cytotoxic accumulation.Genetic silencing of ABCB1 or pharmacological inhibition with the specific P-glycoprotein modulator elacridar or tariquidar restored intracellular paclitaxel levels,as determined by UPLC-MS/MS,and synergistically decreased cell viability as observed in CCK-8 assay.Conclusion:These findings reveal that the ABCB1-mediated drug efflux is a crucial mechanism underlying paclitaxel resistance in NSCLC cells,with UPLC-MS/MS serving as a sensitive analytical method to detect paclitaxel concentration.Inhibition of ABCB1 is a promising therapeutic strategy to resensitize resistant tumor cells to paclitaxel.
基金support from the National Natu-ral Science Foundation of China (Nos.22275081,82372117)China Postdoctoral Science Foundation (2022M711532 and 2022T150302).
文摘The use of antibacterial dressings is crucial in the prevention and treatment of wound infection in emergency sit-uations.However,the efficacy of dressings is compromised by long-term storage or exposure to harsh conditions.Here,an ultrastable in-situ silver nanoparticle dressing(AgSNP@CD)was prepared for effective prevention and treatment of wound infection in emergency.The fabrication process of AgSNP@CD is simple,suitable for large-scale production.Due to the strong interaction between the in-situ synthesized AgNPs and the cotton fabric,AgSNP@CD owned remarkable stability,thus retaining its antimicrobial efficacy even after long-term storage(up to 2 years)and under extreme conditions(damp heat,low temperatures,low-oxygen,water immersion,acid-alkali erosion).Both in vitro and in vivo results demonstrated the extraordinary antibacterial efficacy and stability of AgSNP@CD,facilitating infection prevention and wound healing in extreme conditions.In particular,AgSNP@CD exhibited a superior treatment effect on severe bacteria-infected trauma and can prevent the occur-rence of sepsis effectively.The exceptional stability and antibacterial efficacy of AgSNP@CD under complex and extreme conditions make it a well-suited dressing strategy for the prevention and treatment of wound infection in emergency.
文摘The fast growth of mobile autonomous machines from traditional equipment to unmanned autonomous vehicles has fueled the demand for accurate and reliable localization solutions in diverse application domains.Ultra Wide Band(UWB)technology has emerged as a promising candidate for addressing this need,offering high precision,immunity to multipath interference,and robust performance in challenging environments.In this comprehensive survey,we systematically explore UWB-based localization for mobile autonomous machines,spanning from fundamental principles to future trends.To the best of our knowledge,this review paper stands as the pioneer in systematically dissecting the algorithms of UWB-based localization for mobile autonomous machines,covering a spectrum from bottom-ranging schemes to advanced sensor fusion,error mitigation,and optimization techniques.By synthesizing existing knowledge,evaluating current methodologies,and highlighting future trends,this review aims to catalyze progress and innovation in the field,unlocking new opportunities for mobile autonomous machine applications across diverse industries and domains.Thus,it serves as a valuable resource for researchers,practitioners,and stakeholders interested in advancing the state-of-the-art UWB-based localization for mobile autonomous machines.
基金financial supported by the Natural Science Foundation of Jiangsu Provincial Education Department(No.24KJB430003)the Natural Science Foundation for Young Scholars of Jiangsu Province(No.BK20240979)+3 种基金support of Natural Science Foundation for Young Scholars of Jiangsu Province(No.BK20220628)the National Natural Science Foundation for Young Scholars of China(52301130)the Changzhou Sci&Tech program(No.GJ20220153)support of the Natural Science Foundation of Jiangsu Provincial Education Department(No.21KJB430001).
文摘Traditional metals often exhibit a trade-offbetween strength and plasticity,limiting their wide application of metals in aerospace,transportation,energy industry and other fields[1-3].In order to overcome this dilemma,high-entropy alloys(HEAs),proposed by Yeh et al.and Cantor et al.,are currently of great interest in the materials community due to their excellent mechanical properties[4-7].To further promote the wide application of HEAs in industrial production,Lu et al.developed a new eutectic high-entropy alloy(EHEAs)by combining the potential advantages of traditional eutectic alloys and HEAs[8-11].
基金supported by the National Natural Science Foundation of China(Nos.52201207 and 52271169)the Fundamental Research Funds for the Central University(No.3072024LJ1002).
文摘The active development of space industry necessitates the cre-ation of novel materials with unique properties,including shape memory alloys(SMAs).The development of ultra-high temperature SMAs(UHTSMAs)with operating temperatures above 400℃is a significant challenge[1-3].It is known that reversible thermoelas-tic martensitic transformation(MT)is the basis for shape mem-ory behavior[4].Currently,there are several systems in which MT temperatures meet the above requirements,for example,RuNb[5],HfPd[6],TiPd[7].
文摘In 2024,China’s natural gas industry continues to show a positive trend.In the field of exploration and development,a large ultra-deep water and ultra-shallow gas field has been discovered,further enhancing the unique deep-water complex oil and gas exploration and development technology system independently developed by China.Remarkable achievements have been made in offshore development,including the commissioning of Deep Sea No.1 PhaseⅡ,the first deep-water high-pressure gas field.Additionally,the establishment of the Daji gas field,the first onshore coal rock gas field with an oil and gas equivalent of one million tons,provides strong support for domestic natural gas production.In terms of infrastructure construction,the entire China-Russia east-route natural gas pipeline has been completed,the Xinjiang section of the West Fourth Line is now operational,the Southern Xinjiang Gas Pipeline project has been fully launched,and five new or expanded LNG receiving terminals have been added,increasing the annual receiving capacity by 21.10 million tons.In the field of related equipment manufacturing,China successfully delivered the first vessel of its largest LNG transportation ship construction project,the Greenergy Ocean,and successfully launched its first large-scale floating natural gas liquefaction facility,the NGUYA FLNG.In terms of market supply and demand,natural gas consumption exceeded 400 billion m^(3) for the first time,with apparent consumption reaching 412.43 billion m^(3),an increase of 24.9 billion m^(3) year-on-year,reflecting a growth rate of 6.4%.The total supply reached 424.3 billion m^(3),an increase of 27.5 billion m^(3) year-on-year,with a growth rate of 7.5%.In terms of regulatory policy,China has once again issued a natural gas utilization policy aimed at further guiding the orderly and efficient development of the natural gas market.
