To control the tri-modal microstructure and performance,a prediction model of tri-modal microstructure in the isothermal local loading forming of titanium alloy was developed.The staged isothermal local loading experi...To control the tri-modal microstructure and performance,a prediction model of tri-modal microstructure in the isothermal local loading forming of titanium alloy was developed.The staged isothermal local loading experiment on TA15alloy indicates that there exist four important microstructure evolution phenomena in the development of tri-modal microstructure,i.e.,the generation of lamellarα,content variation of equiaxedα,spatial orientation change of lamellarαand globularization of lamellarα.Considering the laws of these microstructure phenomena,the microstructure model was established to correlate the parameters of tri-modal microstructure and processing conditions.Then,the developed microstructure model was integrated with finite element(FE)model to predict the tri-modal microstructure in the isothermal local loading forming.Its reliability and accuracy were verified by the microstructure observation at different locations of sample.Good agreements between the predicted and experimental results suggest that the developed microstructure model and its combination with FE model are effective in the prediction of tri-modal microstructure in the isothermal local loading forming of TA15alloy.展开更多
Although declining in the US due to restrictions of asbestos exposure, malignant pleura/mesothelioma （MPP） remains a very serious thoracic malignancy that is rising in incidence worldwide （1）. Trirnodality therapy...Although declining in the US due to restrictions of asbestos exposure, malignant pleura/mesothelioma （MPP） remains a very serious thoracic malignancy that is rising in incidence worldwide （1）. Trirnodality therapy with chemotherapy and radiotherapy combined with extrapleural pneumonectomy （EPP） has gained acceptance given the acceptable mortality rate （〈5%） and long term survival reported in patients with epithelial histology, negative margins, and no extrapleural lymph node involvement after trimodalitv treatment （2）.展开更多
Skin-like electronics research aiming to mimic even surpass human-like specific tactile cognition by operating perception-to-cognition-to-feedback of stimulus to build intelligent cognition systems for certain imperce...Skin-like electronics research aiming to mimic even surpass human-like specific tactile cognition by operating perception-to-cognition-to-feedback of stimulus to build intelligent cognition systems for certain imperceptible or inappreciable signals was so attractive.Herein,we constructed an all-in-one tri-modal pressure sensing wearable device to address the issue of power supply by integrating multistage microstructured ionic skin(MM i-skin)and thermoelectric self-power staffs,which exhibits high sensitivity simultaneously.The MM i-skin with multi-stage“interlocked”configurations achieved precise recognition of subtle signals,where the sensitivity reached up to 3.95 kPa^(−1),as well as response time of 46 ms,cyclic stability(over 1500 cycles),a wide detection range of 0–200 kPa.Furthermore,we developed the thermoelectricity nanogenerator,piezoelectricity nanogenerator,and piezocapacitive sensing as an integrated tri-modal pressure sensing,denoted as P-iskin,T-iskin,and C-iskin,respectively.This multifunctional ionic skin enables real-time monitoring of weak body signals,rehab guidance,and robotic motion recognition,demonstrating potential for Internet of things(IoT)applications involving the artificial intelligence-motivated sapiential healthcare Internet(SHI)and widely distributed human-machine interaction(HMI).展开更多
The paper deals with the construction works devoted to extending and upgrading the port functions to the highest European Standards. The Port of Giurgiu is located on the left bank of the Danube River, at the 493 km, ...The paper deals with the construction works devoted to extending and upgrading the port functions to the highest European Standards. The Port of Giurgiu is located on the left bank of the Danube River, at the 493 km, and also at 65 km south of Bucharest, the Capital of Romania. Giurgiu is one of the Romanian largest Danubian Ports. Advanced computer programs were used in design. An active monitoring system, regarding the pre-existing constructions on the site, directly influenced by the excavations was also used. The adopted solutions for infrastructure were dependent by the monitoring results of construction site. The weak foundation conditions as well as the proximity of some existing buildings arouse unexpected obstacles difficult to overpass. However, by a perfect human cooperation all targets were finally reached.展开更多
Revealing the mesoscale deformation mechanisms of titanium alloy with tri-modal microstructure is of great significance to improve its mechanical properties. In this work, the collective behavior and mechanisms of sli...Revealing the mesoscale deformation mechanisms of titanium alloy with tri-modal microstructure is of great significance to improve its mechanical properties. In this work, the collective behavior and mechanisms of slip activities, slip transfer, and grain boundary sliding of tri-modal microstructure were investigated by the combination of quasi-in-situ tensile test, SEM, EBSD and quantitative slip trace analyses. It is found that the slip behavior presents different characteristics in the equiaxed α(α_(p)) and lamellar α(α_(l))grains. Under a low level of deformation, almost all the slip deformation is governed by single basal and prismatic slips for both of α_(p)and α_(l),despite small amount of < a >-pyramidal slip exists in α_(l)grains. As deformation proceeds, < a >-pyramidal and < c + a >-pyramidal slip systems with high Schmid factors were activated in quantities. Specially, certain coarse prismatic slip bands were produced across both of single and colony α_(l)grains whose major axes tilting about 40 °–70 ° from the tensile axis. Slip transfer occurs at the boundaries of α_(p)/α_(p)and α_(l)/β under the condition that there exists perfect alignment between two slip systems and high Schmid factors of outgoing slip system. The slip transfer across α_(l)/β boundary can be divided into two types: straight slip transfer and deflect slip transfer with a deviation angle of 5 °–12 °, depending on the alignment of slip planes of two slip systems. The grain boundary sliding along boundaries of α_(l)/β and α_(p)/β was captured by covering micro-grid on tensile sample. It is found that the crystallographic orientation and the geometrical orientation related to loading axis play great roles in the occurrence of grain boundary sliding.展开更多
Interfacial fluid mixing driven by a shock wave is a common phenomenon that occurs frequently in basic science research and in a variety of applications.In this work,shock-tube experiments on the developments of two-d...Interfacial fluid mixing driven by a shock wave is a common phenomenon that occurs frequently in basic science research and in a variety of applications.In this work,shock-tube experiments on the developments of two-dimensional tri-mode interfaces accelerated by a convergent shock wave are performed.Eight sets of different combinations in the value of phase and that of amplitude in a tri-mode perturbed interface are studied to evaluate the effect of mode coupling on the amplitude growths of the basic modes.The qualitative results show that the phase combination obviously affects the interface morphologies and flow features.The alternation of each mode amplitude does not affect the major flow features,such as the number and arrangement of the bubbles and spikes,but affects the local interface features.Depending upon the phase combination,the mode amplitude growth is either promoted or suppressed by mode coupling relative to the single-mode counterpart.By considering the feedbacks from both the first-order and second-order mode couplings,the mode amplitude growth can be qualitatively predicted.Relative to dual-mode interface,mode coupling occurs earlier in tri-mode interface.For the sets of parameters we studied,the effect of initial phase on the amplitude growth is greater and occurs earlier for the mode with low mode number.In addition,the amplitude development of mode with high mode number is more affected by initial amplitudes of basic modes than that of mode with low mode number.The introduction of the third mode affects the amplitude growths of original two modes,but has little effect on the final mixing width growth.Finally,a theoretical model is proposed to predict the amplitude growth of each basic mode.展开更多
基金Projects(51605388,51575449)supported by the National Natural Science Foundation of ChinaProject(B08040)supported by the "111" Project,China+1 种基金Project(131-QP-2015)supported by the Research Fund of the State Key Laboratory of Solidification Processing(NWPU),ChinaProject supported by the Open Research Fund of State Key Laboratory of Materials Processing and Die&Mould Technology,Huazhong University of Science and Technology,China
文摘To control the tri-modal microstructure and performance,a prediction model of tri-modal microstructure in the isothermal local loading forming of titanium alloy was developed.The staged isothermal local loading experiment on TA15alloy indicates that there exist four important microstructure evolution phenomena in the development of tri-modal microstructure,i.e.,the generation of lamellarα,content variation of equiaxedα,spatial orientation change of lamellarαand globularization of lamellarα.Considering the laws of these microstructure phenomena,the microstructure model was established to correlate the parameters of tri-modal microstructure and processing conditions.Then,the developed microstructure model was integrated with finite element(FE)model to predict the tri-modal microstructure in the isothermal local loading forming.Its reliability and accuracy were verified by the microstructure observation at different locations of sample.Good agreements between the predicted and experimental results suggest that the developed microstructure model and its combination with FE model are effective in the prediction of tri-modal microstructure in the isothermal local loading forming of TA15alloy.
文摘Although declining in the US due to restrictions of asbestos exposure, malignant pleura/mesothelioma （MPP） remains a very serious thoracic malignancy that is rising in incidence worldwide （1）. Trirnodality therapy with chemotherapy and radiotherapy combined with extrapleural pneumonectomy （EPP） has gained acceptance given the acceptable mortality rate （〈5%） and long term survival reported in patients with epithelial histology, negative margins, and no extrapleural lymph node involvement after trimodalitv treatment （2）.
基金supported by the National Natural Science Foundation of China(No.52271241 and 52071282)the Applied Basic Research Key Project of Yunnan(202001BB050046)the National Training Programs of Innovation and Entrepreneurship for Undergraduates(No.202210673068 and 202210673002).
文摘Skin-like electronics research aiming to mimic even surpass human-like specific tactile cognition by operating perception-to-cognition-to-feedback of stimulus to build intelligent cognition systems for certain imperceptible or inappreciable signals was so attractive.Herein,we constructed an all-in-one tri-modal pressure sensing wearable device to address the issue of power supply by integrating multistage microstructured ionic skin(MM i-skin)and thermoelectric self-power staffs,which exhibits high sensitivity simultaneously.The MM i-skin with multi-stage“interlocked”configurations achieved precise recognition of subtle signals,where the sensitivity reached up to 3.95 kPa^(−1),as well as response time of 46 ms,cyclic stability(over 1500 cycles),a wide detection range of 0–200 kPa.Furthermore,we developed the thermoelectricity nanogenerator,piezoelectricity nanogenerator,and piezocapacitive sensing as an integrated tri-modal pressure sensing,denoted as P-iskin,T-iskin,and C-iskin,respectively.This multifunctional ionic skin enables real-time monitoring of weak body signals,rehab guidance,and robotic motion recognition,demonstrating potential for Internet of things(IoT)applications involving the artificial intelligence-motivated sapiential healthcare Internet(SHI)and widely distributed human-machine interaction(HMI).
文摘The paper deals with the construction works devoted to extending and upgrading the port functions to the highest European Standards. The Port of Giurgiu is located on the left bank of the Danube River, at the 493 km, and also at 65 km south of Bucharest, the Capital of Romania. Giurgiu is one of the Romanian largest Danubian Ports. Advanced computer programs were used in design. An active monitoring system, regarding the pre-existing constructions on the site, directly influenced by the excavations was also used. The adopted solutions for infrastructure were dependent by the monitoring results of construction site. The weak foundation conditions as well as the proximity of some existing buildings arouse unexpected obstacles difficult to overpass. However, by a perfect human cooperation all targets were finally reached.
基金National Natural Science Foundation of China for Key Program(50935007)National Basic Research Program of China(2010CB731701)+1 种基金National Natural Science Foundation of China(51175428)"111"Project(B08040)
基金the support of the National Natural Science Foundation of China(No.51875467,92060107)the National Science Fund for Distinguished Young Scholars of China(No.51625505)+2 种基金the National Key R&D Program of China(No.2020YFA0711100)Young Elite Scientists Sponsorship Program and the General Program of ScienceTechnology Development Project of Beijing Municipal Education Commission(No.KM202010005008)
文摘Revealing the mesoscale deformation mechanisms of titanium alloy with tri-modal microstructure is of great significance to improve its mechanical properties. In this work, the collective behavior and mechanisms of slip activities, slip transfer, and grain boundary sliding of tri-modal microstructure were investigated by the combination of quasi-in-situ tensile test, SEM, EBSD and quantitative slip trace analyses. It is found that the slip behavior presents different characteristics in the equiaxed α(α_(p)) and lamellar α(α_(l))grains. Under a low level of deformation, almost all the slip deformation is governed by single basal and prismatic slips for both of α_(p)and α_(l),despite small amount of < a >-pyramidal slip exists in α_(l)grains. As deformation proceeds, < a >-pyramidal and < c + a >-pyramidal slip systems with high Schmid factors were activated in quantities. Specially, certain coarse prismatic slip bands were produced across both of single and colony α_(l)grains whose major axes tilting about 40 °–70 ° from the tensile axis. Slip transfer occurs at the boundaries of α_(p)/α_(p)and α_(l)/β under the condition that there exists perfect alignment between two slip systems and high Schmid factors of outgoing slip system. The slip transfer across α_(l)/β boundary can be divided into two types: straight slip transfer and deflect slip transfer with a deviation angle of 5 °–12 °, depending on the alignment of slip planes of two slip systems. The grain boundary sliding along boundaries of α_(l)/β and α_(p)/β was captured by covering micro-grid on tensile sample. It is found that the crystallographic orientation and the geometrical orientation related to loading axis play great roles in the occurrence of grain boundary sliding.
基金supported by the National Natural Science Foundation of China (Grant Nos.12372281 and 12388101)the Strategic Priority Research Program of Chinese Academy of Sciences (Grant No.XDB0620201)Youth Innovation Promotion Association CAS。
文摘Interfacial fluid mixing driven by a shock wave is a common phenomenon that occurs frequently in basic science research and in a variety of applications.In this work,shock-tube experiments on the developments of two-dimensional tri-mode interfaces accelerated by a convergent shock wave are performed.Eight sets of different combinations in the value of phase and that of amplitude in a tri-mode perturbed interface are studied to evaluate the effect of mode coupling on the amplitude growths of the basic modes.The qualitative results show that the phase combination obviously affects the interface morphologies and flow features.The alternation of each mode amplitude does not affect the major flow features,such as the number and arrangement of the bubbles and spikes,but affects the local interface features.Depending upon the phase combination,the mode amplitude growth is either promoted or suppressed by mode coupling relative to the single-mode counterpart.By considering the feedbacks from both the first-order and second-order mode couplings,the mode amplitude growth can be qualitatively predicted.Relative to dual-mode interface,mode coupling occurs earlier in tri-mode interface.For the sets of parameters we studied,the effect of initial phase on the amplitude growth is greater and occurs earlier for the mode with low mode number.In addition,the amplitude development of mode with high mode number is more affected by initial amplitudes of basic modes than that of mode with low mode number.The introduction of the third mode affects the amplitude growths of original two modes,but has little effect on the final mixing width growth.Finally,a theoretical model is proposed to predict the amplitude growth of each basic mode.
