The incidence of refractory mycoplasma pneumoniae pneumonia(RMPP)in children is increasing year by year,and the disease is progressing rapidly.It is accompanied by serious complications and legacy effects,seriously af...The incidence of refractory mycoplasma pneumoniae pneumonia(RMPP)in children is increasing year by year,and the disease is progressing rapidly.It is accompanied by serious complications and legacy effects,seriously affecting the quality of life of children.The selection,dosage,and course of anti-MP drugs in children with RMPP have brought a lot of troubles to pediatric hospitals.In the present study,the characteristics,usage and dosage,drug resistance mechanism,and treatment progress of anti-MP drugs for the treatment of RMPP in children were reviewed.Collectively,our findings provided ideas for the treatment of children with RMPP using anti-MP drugs.展开更多
In wind tunnel tests for the full-model fixed with sting,the low structural damping of the long cantilever sting results in destructive low-frequency and large-amplitude vibration.In order to obtain high-quality wind ...In wind tunnel tests for the full-model fixed with sting,the low structural damping of the long cantilever sting results in destructive low-frequency and large-amplitude vibration.In order to obtain high-quality wind tunnel test data and ensure the safety of wind tunnel tests,an energy-fuzzy adaptive PD(Proportion Differentiation)control method is proposed.This method is used for active vibration control of a cantilever structure under variable aerodynamic load excitation,and real-time adjustment of parameters is achieved according to the system characteristics of vibration energy.Meanwhile,a real-time method is proposed to estimate the real-time vibration energy through the vibration acceleration signal,and the average exciting power of aerodynamic load is obtained by deducting the part of the power contributed by the vibration suppressor from the total power.Furthermore,an energy-fuzzy adaptive PD controller is proposed to achieve adaptive control to the changes of the aerodynamic load.Besides,the subsonic and transonic experiments were carried out in wind tunnel,the results revealed that comparing to fixed gain PD controllers,the energy-fuzzy adaptive PD controller maintains higher performance.展开更多
This paper provides a direct and fast acquisition algorithm of civilian long length（CL） codes in the L2 civil（L2C） signal. The proposed algorithm simultaneously reduces the number of fast Fourier transformation（...This paper provides a direct and fast acquisition algorithm of civilian long length（CL） codes in the L2 civil（L2C） signal. The proposed algorithm simultaneously reduces the number of fast Fourier transformation（FFT） correlation through hyper code technique and the amount of points in every FFT correlation by using an averaging correlation method. To validate the proposed acquisition performance, the paper applies this algorithm to the real L2C signal collected by the global positioning system（GPS） L2C intermediate frequency（IF） signal sampler—SIS100L2C. The acquisition results show that the proposed modified algorithm can acquire the code phase accurately with less calculation and its acquisition performance is better than the single hyper code method.展开更多
Organic-inorganic hybrid perovskite materials have attracted significant research efforts because of their outstanding properties. Meanwhile the crystallization of organic-inorganic hybrid perovskite materials can sig...Organic-inorganic hybrid perovskite materials have attracted significant research efforts because of their outstanding properties. Meanwhile the crystallization of organic-inorganic hybrid perovskite materials can significantly influence the films quality. Here, we research the influence of the characteristics of PbI2 thin film on final perovskite films and the mechanisms of film formation based on the two-step sequential deposition method. We found that the characteristics of PbI2 thin film, such as the grain size, the grain shape, the surface roughness and the film densification, have significant effects on the final perovskite films due to different film crystallization process. According to the analysis on the characteristics of the perovskite films obtained from different PbI2precursor, we suggested that the formation of perovskite film begins from the PbI2 crystals expanding when they are converted to MAPbI3 perovskite by migration of MA+ cations from the grain boundaries.展开更多
With the widespread deployment of biometric recognition,personal data security and privacy are attracted more and more attentions.A crucial privacy issue is how to ensure the security of user template.This paper propo...With the widespread deployment of biometric recognition,personal data security and privacy are attracted more and more attentions.A crucial privacy issue is how to ensure the security of user template.This paper proposes a novel template protection algorithm for face recognition based on chaotic map.Each face template is corresponding to different chaotic sequence produced by system master key and user identification number.The order of chaotic sequence controls the substitution index of face template.Experiment results on facial FERET database show that our algorithm can significantly improve the recognition performance and ensure the security of face template.展开更多
With the rapid advancement of virtual reality,dynamic gesture recognition technology has become an indispensable and critical technique for users to achieve human–computer interaction in virtual environments.The reco...With the rapid advancement of virtual reality,dynamic gesture recognition technology has become an indispensable and critical technique for users to achieve human–computer interaction in virtual environments.The recognition of dynamic gestures is a challenging task due to the high degree of freedom and the influence of individual differences and the change of gesture space.To solve the problem of low recognition accuracy of existing networks,an improved dynamic gesture recognition algorithm based on ResNeXt architecture is proposed.The algorithm employs three-dimensional convolution techniques to effectively capture the spatiotemporal features intrinsic to dynamic gestures.Additionally,to enhance the model’s focus and improve its accuracy in identifying dynamic gestures,a lightweight convolutional attention mechanism is introduced.This mechanism not only augments the model’s precision but also facilitates faster convergence during the training phase.In order to further optimize the performance of the model,a deep attention submodule is added to the convolutional attention mechanism module to strengthen the network’s capability in temporal feature extraction.Empirical evaluations on EgoGesture and NvGesture datasets show that the accuracy of the proposed model in dynamic gesture recognition reaches 95.03%and 86.21%,respectively.When operating in RGB mode,the accuracy reached 93.49%and 80.22%,respectively.These results underscore the effectiveness of the proposed algorithm in recognizing dynamic gestures with high accuracy,showcasing its potential for applications in advanced human–computer interaction systems.展开更多
DNA的化学修饰可以使DNA分子具有其他功能,如构建DNA编码化合物库(DNA-encoded chemical libraries,DECLs)、制备用于生物传感的DNA探针、提高DNA适配体的结合活性等.对DNA化学修饰反应效率已有的研究集中在对反应条件(溶剂、温度等)的...DNA的化学修饰可以使DNA分子具有其他功能,如构建DNA编码化合物库(DNA-encoded chemical libraries,DECLs)、制备用于生物传感的DNA探针、提高DNA适配体的结合活性等.对DNA化学修饰反应效率已有的研究集中在对反应条件(溶剂、温度等)的优化,为了确定影响修饰效率的重要因素,我们以DNA-NH_2的酰化反应为模型进行了系统研究.结果表明,影响DNA-NH_2酰化反应的主要因素是DNA和酰化试剂的分子量.相反,DNA的结构在反应中起着次要的作用.展开更多
Surface properties are considered to be important factors in addressing proper functionalities.In this paper,a multifunctional mussel-inspired coating was prepared via the direct copolymerization of epigallocatechin g...Surface properties are considered to be important factors in addressing proper functionalities.In this paper,a multifunctional mussel-inspired coating was prepared via the direct copolymerization of epigallocatechin gallate(EGCG)and arginine.The coating formation was confirmed by X-ray photoelectron spectroscopy and Fourier transform infrared spectra.The EGCG/arginine coating contained diverse functional groups like amines,phenols and carboxyls,whose densities were also tunable.Such mussel-inspired coating could also be applied as an ad-layer for its secondary reactivity,demonstrated by quartz crystal microbalance technique.Moreover,the tunable surface density of phenols showed potential ability in modulating endothelial cell and smooth muscle cell viability.The coatings rich in phenols presented excellent free radical scavenging property.Current results strongly indicated the potential of EGCG/arginine coatings to be applied as an ad-layer for vascular materials.展开更多
基金Science and Technology Plan Project of Jinan Health Committee(Grant No.2021-1-08)。
文摘The incidence of refractory mycoplasma pneumoniae pneumonia(RMPP)in children is increasing year by year,and the disease is progressing rapidly.It is accompanied by serious complications and legacy effects,seriously affecting the quality of life of children.The selection,dosage,and course of anti-MP drugs in children with RMPP have brought a lot of troubles to pediatric hospitals.In the present study,the characteristics,usage and dosage,drug resistance mechanism,and treatment progress of anti-MP drugs for the treatment of RMPP in children were reviewed.Collectively,our findings provided ideas for the treatment of children with RMPP using anti-MP drugs.
基金co-supported by the project of National Key R&D Program of China(No.2018YFA0703304)the National Natural Science Foundation of China(No.U1808217)Liaoning Revitalization Talents Program of China(No.XLYC1807086)。
文摘In wind tunnel tests for the full-model fixed with sting,the low structural damping of the long cantilever sting results in destructive low-frequency and large-amplitude vibration.In order to obtain high-quality wind tunnel test data and ensure the safety of wind tunnel tests,an energy-fuzzy adaptive PD(Proportion Differentiation)control method is proposed.This method is used for active vibration control of a cantilever structure under variable aerodynamic load excitation,and real-time adjustment of parameters is achieved according to the system characteristics of vibration energy.Meanwhile,a real-time method is proposed to estimate the real-time vibration energy through the vibration acceleration signal,and the average exciting power of aerodynamic load is obtained by deducting the part of the power contributed by the vibration suppressor from the total power.Furthermore,an energy-fuzzy adaptive PD controller is proposed to achieve adaptive control to the changes of the aerodynamic load.Besides,the subsonic and transonic experiments were carried out in wind tunnel,the results revealed that comparing to fixed gain PD controllers,the energy-fuzzy adaptive PD controller maintains higher performance.
基金supported by the Fundamental Research Fund for the Central Universities(NS2013016)
文摘This paper provides a direct and fast acquisition algorithm of civilian long length（CL） codes in the L2 civil（L2C） signal. The proposed algorithm simultaneously reduces the number of fast Fourier transformation（FFT） correlation through hyper code technique and the amount of points in every FFT correlation by using an averaging correlation method. To validate the proposed acquisition performance, the paper applies this algorithm to the real L2C signal collected by the global positioning system（GPS） L2C intermediate frequency（IF） signal sampler—SIS100L2C. The acquisition results show that the proposed modified algorithm can acquire the code phase accurately with less calculation and its acquisition performance is better than the single hyper code method.
文摘Organic-inorganic hybrid perovskite materials have attracted significant research efforts because of their outstanding properties. Meanwhile the crystallization of organic-inorganic hybrid perovskite materials can significantly influence the films quality. Here, we research the influence of the characteristics of PbI2 thin film on final perovskite films and the mechanisms of film formation based on the two-step sequential deposition method. We found that the characteristics of PbI2 thin film, such as the grain size, the grain shape, the surface roughness and the film densification, have significant effects on the final perovskite films due to different film crystallization process. According to the analysis on the characteristics of the perovskite films obtained from different PbI2precursor, we suggested that the formation of perovskite film begins from the PbI2 crystals expanding when they are converted to MAPbI3 perovskite by migration of MA+ cations from the grain boundaries.
文摘With the widespread deployment of biometric recognition,personal data security and privacy are attracted more and more attentions.A crucial privacy issue is how to ensure the security of user template.This paper proposes a novel template protection algorithm for face recognition based on chaotic map.Each face template is corresponding to different chaotic sequence produced by system master key and user identification number.The order of chaotic sequence controls the substitution index of face template.Experiment results on facial FERET database show that our algorithm can significantly improve the recognition performance and ensure the security of face template.
文摘With the rapid advancement of virtual reality,dynamic gesture recognition technology has become an indispensable and critical technique for users to achieve human–computer interaction in virtual environments.The recognition of dynamic gestures is a challenging task due to the high degree of freedom and the influence of individual differences and the change of gesture space.To solve the problem of low recognition accuracy of existing networks,an improved dynamic gesture recognition algorithm based on ResNeXt architecture is proposed.The algorithm employs three-dimensional convolution techniques to effectively capture the spatiotemporal features intrinsic to dynamic gestures.Additionally,to enhance the model’s focus and improve its accuracy in identifying dynamic gestures,a lightweight convolutional attention mechanism is introduced.This mechanism not only augments the model’s precision but also facilitates faster convergence during the training phase.In order to further optimize the performance of the model,a deep attention submodule is added to the convolutional attention mechanism module to strengthen the network’s capability in temporal feature extraction.Empirical evaluations on EgoGesture and NvGesture datasets show that the accuracy of the proposed model in dynamic gesture recognition reaches 95.03%and 86.21%,respectively.When operating in RGB mode,the accuracy reached 93.49%and 80.22%,respectively.These results underscore the effectiveness of the proposed algorithm in recognizing dynamic gestures with high accuracy,showcasing its potential for applications in advanced human–computer interaction systems.
文摘DNA的化学修饰可以使DNA分子具有其他功能,如构建DNA编码化合物库(DNA-encoded chemical libraries,DECLs)、制备用于生物传感的DNA探针、提高DNA适配体的结合活性等.对DNA化学修饰反应效率已有的研究集中在对反应条件(溶剂、温度等)的优化,为了确定影响修饰效率的重要因素,我们以DNA-NH_2的酰化反应为模型进行了系统研究.结果表明,影响DNA-NH_2酰化反应的主要因素是DNA和酰化试剂的分子量.相反,DNA的结构在反应中起着次要的作用.
基金The author would like to thank Dr Manfred.F.Maitz for his selfless assistance of this job and appreciate Mr Chongxi Jiang and Mrs Ru Shen for their help and contributions on sample characterization and analysis.Specially thank Miss Si Zhong and Mr Xin Wang for their help of cell compatibility evaluation.This work was supported by Natural Science Foundation of China(Grant 51173149,81330031 and 31270020)Sichuan Province Science and Technology Support Program(No.2014SZ0128)the 111 Project.The Program of Introducing Talents of Discipline to Universities(B16033).
文摘Surface properties are considered to be important factors in addressing proper functionalities.In this paper,a multifunctional mussel-inspired coating was prepared via the direct copolymerization of epigallocatechin gallate(EGCG)and arginine.The coating formation was confirmed by X-ray photoelectron spectroscopy and Fourier transform infrared spectra.The EGCG/arginine coating contained diverse functional groups like amines,phenols and carboxyls,whose densities were also tunable.Such mussel-inspired coating could also be applied as an ad-layer for its secondary reactivity,demonstrated by quartz crystal microbalance technique.Moreover,the tunable surface density of phenols showed potential ability in modulating endothelial cell and smooth muscle cell viability.The coatings rich in phenols presented excellent free radical scavenging property.Current results strongly indicated the potential of EGCG/arginine coatings to be applied as an ad-layer for vascular materials.
