Background: Depression is a common mental disorder. Globally, more than 340 million people of all ages suffer from depression. The aim of our study was to determine the association between major dietary patterns and d...Background: Depression is a common mental disorder. Globally, more than 340 million people of all ages suffer from depression. The aim of our study was to determine the association between major dietary patterns and depression among type 2 diabetes patients. Methods: This cross-sectional study was conducted among 480 type 2 diabetes patients attending primary healthcare centers in Gaza Strip, Palestine. The depression, anxiety, stress scales (DASS, 21-items) questionnaire was used to measure the score of depression. The participants’ demographic, socioeconomic and medical history data was collected and the 98-items semi-quantitative food frequency questionnaire was used for evaluating the dietary patterns. Statistical analysis was performed using SPSS version 20. Results: Based on depression scale, 29.0% of type 2 diabetes patients had depression, (58.3% females, and 41.7% males). The prevalence of mild, moderate, severe, and very severe depression was 11.7%, 8.5%, 6.7%, and 2.1%, respectively. Furthermore, two major dietary patterns were identified by factor analysis: The Western, and the grains-vegetables, and fruits patterns. After adjusting for the potential confounders, patients in the lowest tertile (T1) of the grains-vegetables, and fruits dietary pattern had a lower odds for depression (OR 0.763 95% CI (0.667 - 0.871), P value = 0.001);where as a higher odds for healthy (OR 1.443 95% CI (1.131 - 1.839), P value = 0.004), compared to those in the highest tertile (T3). Conclusion: The grains-vegetables, and fruits dietary pattern may be associated with a lower prevalence of depression, and has been shown to be the healthiest dietary pattern among type 2 diabetes patients.展开更多
Software Defined Network(SDN)and Network Function Virtualization(NFV)technology promote several benefits to network operators,including reduced maintenance costs,increased network operational performance,simplified ne...Software Defined Network(SDN)and Network Function Virtualization(NFV)technology promote several benefits to network operators,including reduced maintenance costs,increased network operational performance,simplified network lifecycle,and policies management.Network vulnerabilities try to modify services provided by Network Function Virtualization MANagement and Orchestration(NFV MANO),and malicious attacks in different scenarios disrupt the NFV Orchestrator(NFVO)and Virtualized Infrastructure Manager(VIM)lifecycle management related to network services or individual Virtualized Network Function(VNF).This paper proposes an anomaly detection mechanism that monitors threats in NFV MANO and manages promptly and adaptively to implement and handle security functions in order to enhance the quality of experience for end users.An anomaly detector investigates these identified risks and provides secure network services.It enables virtual network security functions and identifies anomalies in Kubernetes(a cloud-based platform).For training and testing purpose of the proposed approach,an intrusion-containing dataset is used that hold multiple malicious activities like a Smurf,Neptune,Teardrop,Pod,Land,IPsweep,etc.,categorized as Probing(Prob),Denial of Service(DoS),User to Root(U2R),and Remote to User(R2L)attacks.An anomaly detector is anticipated with the capabilities of a Machine Learning(ML)technique,making use of supervised learning techniques like Logistic Regression(LR),Support Vector Machine(SVM),Random Forest(RF),Naïve Bayes(NB),and Extreme Gradient Boosting(XGBoost).The proposed framework has been evaluated by deploying the identified ML algorithm on a Jupyter notebook in Kubeflow to simulate Kubernetes for validation purposes.RF classifier has shown better outcomes(99.90%accuracy)than other classifiers in detecting anomalies/intrusions in the containerized environment.展开更多
In an injection moulding process, the parallelism b et ween the tie bars of the injection moulding machine is very important as it will affect the mould closing and clamping system. In recent years, more and more ho t...In an injection moulding process, the parallelism b et ween the tie bars of the injection moulding machine is very important as it will affect the mould closing and clamping system. In recent years, more and more ho t runner systems are being applied in the moulding industry to save material and decrease the losses of injection pressure. Heat transfer from hot runner system from the fixed half which is secured in the fix machine platen could transmit s o much heat that it may cause high temperature differential between the machine fix platen and moving platen. This will cause the tie bar to become unparallel. Part quality will be compromised and the wear of the tie bar will be excessive. Overhaul of the tie bar may be necessary after a short period of time which is c ostly. This raises the need to analyze the heat transfer from the hot runner sys tem to the machine fix platen and the methods of isolating or minimizing the hea t transfer. In this case study, a photo lens article mould was used. The mould w as built with a direct hot runner nozzle system. Heat conduction from hot runner and machine screw to machine fix platen were studied based on either using high temperature heat insulating plate put in placed between the mould and the mould ing machine fix platen or drill cooling channels in the front mould clamping pla te. The high temperature insulator is very costly as it is made out of glass re inforced polymer composite material. Experimental results were obtained and anal yzed to find the best method to minimize the unwanted heat transfer using the ch eapest and most effective method.展开更多
Apoptosis in the testis has two putative roles during normal spermatogenesis; limitation of the germ cell population to numbers that can be supported by the Sertoli cells, and, possibly, selective depletion of meiotic...Apoptosis in the testis has two putative roles during normal spermatogenesis; limitation of the germ cell population to numbers that can be supported by the Sertoli cells, and, possibly, selective depletion of meiotic and postmeiotic abnormal germ cells. We investigated the demographic and biological correlates of the pro-apoptotic marker Fas and the anti-apoptotic marker Bcl-xL in sperm cells of fertile men. Six hundred and four men from Greenland, Poland and Ukraine were consecutively enrolled during their pregnant wife＇s antenatal visits. Semen analysis was performed as recommended by the World Health Organization. Immunofluorescence coupled to flow cytometry was utilized for detection of apoptotic markers in the sperm cell. DNA damage was assessed by flow cytometry using both the sperm chromatin structure assay （SCSA） and the terminal deoxynucleotidyl transferase dUTP nick end labelling （TUNEL） assay. The percentage of Fas-positive sperm cells was higher in men with high total sperm count （P〈O.01）, more motile sperms （P=-O.04） and fewer sperm head defects （P=-O.05）. These associations were consistent within and across study regions. Furthermore, testosterone, follicle-stimulating hormone （FSH） and sexual hormone-binding globulin （SHBG） were significantly negatively correlated with Fas within and across regions as well. The data indicated no association between the anti-apoptotic Bcl-xL marker and semen or personal characteristics. The finding of Fas-positive sperm cells associated with better semen quality in a cohort of spouses of pregnant women seems different from previous data obtained in infertile men and warrants further investigation to clarify the biological significance of sperm apoptotic markers.展开更多
Objective:Andrographis paniculata is a well-known medicinal plant in Southeast Asia,India and China.The plant contains andrographolide(AN),a very important phytochemical used in various health problems.However,AN is l...Objective:Andrographis paniculata is a well-known medicinal plant in Southeast Asia,India and China.The plant contains andrographolide(AN),a very important phytochemical used in various health problems.However,AN is low in oral absorption bioavailability of AN due to the rapid clearance and high protein binding capacity.Methods:The present study was aimed to develop a nano-phytovesicular formulation of semi-purified AN extracts from a naturally occurring phospholipid(soya phosphatidylcholine)in order to increase the oral absorption and antihyperglycemic activity in rats.Results:The nano-phyto vesicle of semi-purified AN extracts equivalent to 25 mg/kg AN significantly protected the hyperglycemic condition of rats.The in vitro and in vivo experiments results proved that the nano-phytovesicular system of plant extracts containing AN produced better oral absorption,bioavailability and improved antihyperglycemic activity compared with that of free AN at dose of 50 mg/kg.Conclusion:Hence,the prepared semi-purified extract nano-phytovesicular system is helpful in solving the problem of rapid clearance of AN.展开更多
Considering the evolution of rotation sensing and timing applications realized in micro-electro-mechanical systems(MEMS),flexural mode resonant shapes are outperformed by bulk acoustic wave(BAW)counterparts by achievi...Considering the evolution of rotation sensing and timing applications realized in micro-electro-mechanical systems(MEMS),flexural mode resonant shapes are outperformed by bulk acoustic wave(BAW)counterparts by achieving higher frequencies with both electrostatic and piezoelectric transduction.Within the 1-30 MHz range,which hosts BAW gyroscopes and timing references,piezoelectric and electrostatic MEMS have similar transduction efficiency.Although,when designed intelligently,electrostatic transduction allows self-alignment between electrodes and the resonator for various BAW modes,misalignment is inevitable regarding piezoelectric transduction of BAW modes that require electrode patterning.In this paper transverse piezoelectric actuation of[011]oriented single crystal lead magnesium niobate-lead titanate(PMN-PT)thin film disks are shown to excite the tangential mode and family of elliptical compound resonant modes,utilizing a self-aligned and unpatterned electrode that spans the entire disk surface.The resonant mode coupling is achieved by employing a unique property of[011]PMN-PT,where the in-plane piezoelectric coefficients have opposite signs.Fabricating 1-port disk transducers,RF reflection measurements are performed that demonstrate the compound mode family shapes in the 1-30 MHz range.Independent verification of mode transduction is achieved using in-plane displacement measurements with Polytec’s laser Doppler vibrometer(LDV).While the tangential mode achieves a 40°/s dithering rate at 335 kHz resonant frequency,the n=2 wine-glass mode achieves 11.46 nm tip displacement at 8.42 MHz resonant frequency on a radius of 60μm disk resonator in air.A single electrode resonator that can excite both tangential and wine-glass modes with such metrics lays the foundation for a BAW MEMS gyroscope with a built-in primary calibration stage.展开更多
Accurate local temperature measurement at micro and nanoscales requires thermometry with high resolution because of ultra-low thermal transport.Among the various methods for measuring temperature,optical techniques ha...Accurate local temperature measurement at micro and nanoscales requires thermometry with high resolution because of ultra-low thermal transport.Among the various methods for measuring temperature,optical techniques have shown the most precise temperature detection,with resolutions reaching(-10^(-9) K).In this work,we present a nanomechanical device with nano-Kelvin resolution(-10^(-9) K)at room temperature and 1 atm.The device uses a 20 nm thick silicon nitride(SiN)membrane,forming an air chamber as the sensing area.The presented device has a temperature sensing area>1 mm^(2)for micro/nanoscale objects with reduced target placement constraints as the target can be placed anywhere on the>1 mm^(2)sensing area.The temperature resolution of the SiN membrane device is determined by deflection at the center of the membrane.The temperature resolution is inversely proportional to the membrane's stiffness,as detailed through analysis and measurements of stiffness and noise equivalent temperature(NET)in the pre-stressed SiN membrane.The achievable heat flow resolution of the membrane device is 100 pW,making it suitable for examining thermal transport on micro and nanoscales.展开更多
We demonstrate a compact heterodyne Laser Doppler Vibrometer (LDV) based on the realization of optical frequency shift in the silicon nitride photonic integration platform (TriPleX). We theoretically study, and experi...We demonstrate a compact heterodyne Laser Doppler Vibrometer (LDV) based on the realization of optical frequency shift in the silicon nitride photonic integration platform (TriPleX). We theoretically study, and experimentally evaluate two different photonic integrated optical frequency shifters (OFSs), utilizing serrodyne and single- sideband (SSB) modulation. Both OFSs employ stress-optic modulators (SOMs) based on the non-resonant piezoelectrical actuation of lead zirconate titanate (PZT) thin- films, deposited on top of the silicon nitride waveguides with a wafer-scale process. To improve the modulation bandwidth of the SOMs we investigate a novel configuration of the electrodes used for the actuation, where both electrodes are placed on top of the PZT layer. Using this top-top electrode configuration we report frequency shift of 100 kHz and 2.5 MHz, and suppression ratio of the unwanted sidebands of 22.1 dB and 39 dB, using the serrodyne and the SSB OFS, respectively. The best performing SOM structure induces 0.25π peak-to-peak sinusoidal phase-shift with 156 mW power dissipation at 2.5 MHz. We use the SSB-OFS in our compact LDV system to demonstrate vibration measurements in the kHz regime. The system comprises a dual-polarization coherent detector built in the PolyBoard platform, utilizing hybrid integration of InP photodiodes (PDs). High quality LDV performance with measurement of vibration frequencies up to several hundreds of kHz and displacement resolution of 10 pm are supported with our system.展开更多
Corrosion on a plate of magnesium alloy WZ73 in contact with 0.001 mol/L NaCl solution was analysed by long-range testing using the acoustic emission(AE)technique.At a distance d=1.66 m to the source,the Lamb wave pro...Corrosion on a plate of magnesium alloy WZ73 in contact with 0.001 mol/L NaCl solution was analysed by long-range testing using the acoustic emission(AE)technique.At a distance d=1.66 m to the source,the Lamb wave propagation of resulting AE events was examined and used for corrosion source location.As a first step,pencil lead break test was carried out and corresponding Lamb wave analysis served as reference to the varying corrosion signals of lower intensity.Additionally,the plate was excited by a piezo transducer for imitating a selected corrosion event.For analysis of the propagating wave field,the plate surface was measured by a scanning laser Doppler vibrometer(SLDV),allowing a high-resolution corrosion signal reconstruction and path tracking of direct and reflected Lamb wave packets.Based on the SLDV results,a deeper understanding of the complex wave field propagation during the sensor-based corrosion analysis was achieved.展开更多
文摘Background: Depression is a common mental disorder. Globally, more than 340 million people of all ages suffer from depression. The aim of our study was to determine the association between major dietary patterns and depression among type 2 diabetes patients. Methods: This cross-sectional study was conducted among 480 type 2 diabetes patients attending primary healthcare centers in Gaza Strip, Palestine. The depression, anxiety, stress scales (DASS, 21-items) questionnaire was used to measure the score of depression. The participants’ demographic, socioeconomic and medical history data was collected and the 98-items semi-quantitative food frequency questionnaire was used for evaluating the dietary patterns. Statistical analysis was performed using SPSS version 20. Results: Based on depression scale, 29.0% of type 2 diabetes patients had depression, (58.3% females, and 41.7% males). The prevalence of mild, moderate, severe, and very severe depression was 11.7%, 8.5%, 6.7%, and 2.1%, respectively. Furthermore, two major dietary patterns were identified by factor analysis: The Western, and the grains-vegetables, and fruits patterns. After adjusting for the potential confounders, patients in the lowest tertile (T1) of the grains-vegetables, and fruits dietary pattern had a lower odds for depression (OR 0.763 95% CI (0.667 - 0.871), P value = 0.001);where as a higher odds for healthy (OR 1.443 95% CI (1.131 - 1.839), P value = 0.004), compared to those in the highest tertile (T3). Conclusion: The grains-vegetables, and fruits dietary pattern may be associated with a lower prevalence of depression, and has been shown to be the healthiest dietary pattern among type 2 diabetes patients.
基金This work was funded by the Deanship of Scientific Research at Jouf University under Grant Number(DSR2022-RG-0102).
文摘Software Defined Network(SDN)and Network Function Virtualization(NFV)technology promote several benefits to network operators,including reduced maintenance costs,increased network operational performance,simplified network lifecycle,and policies management.Network vulnerabilities try to modify services provided by Network Function Virtualization MANagement and Orchestration(NFV MANO),and malicious attacks in different scenarios disrupt the NFV Orchestrator(NFVO)and Virtualized Infrastructure Manager(VIM)lifecycle management related to network services or individual Virtualized Network Function(VNF).This paper proposes an anomaly detection mechanism that monitors threats in NFV MANO and manages promptly and adaptively to implement and handle security functions in order to enhance the quality of experience for end users.An anomaly detector investigates these identified risks and provides secure network services.It enables virtual network security functions and identifies anomalies in Kubernetes(a cloud-based platform).For training and testing purpose of the proposed approach,an intrusion-containing dataset is used that hold multiple malicious activities like a Smurf,Neptune,Teardrop,Pod,Land,IPsweep,etc.,categorized as Probing(Prob),Denial of Service(DoS),User to Root(U2R),and Remote to User(R2L)attacks.An anomaly detector is anticipated with the capabilities of a Machine Learning(ML)technique,making use of supervised learning techniques like Logistic Regression(LR),Support Vector Machine(SVM),Random Forest(RF),Naïve Bayes(NB),and Extreme Gradient Boosting(XGBoost).The proposed framework has been evaluated by deploying the identified ML algorithm on a Jupyter notebook in Kubeflow to simulate Kubernetes for validation purposes.RF classifier has shown better outcomes(99.90%accuracy)than other classifiers in detecting anomalies/intrusions in the containerized environment.
文摘In an injection moulding process, the parallelism b et ween the tie bars of the injection moulding machine is very important as it will affect the mould closing and clamping system. In recent years, more and more ho t runner systems are being applied in the moulding industry to save material and decrease the losses of injection pressure. Heat transfer from hot runner system from the fixed half which is secured in the fix machine platen could transmit s o much heat that it may cause high temperature differential between the machine fix platen and moving platen. This will cause the tie bar to become unparallel. Part quality will be compromised and the wear of the tie bar will be excessive. Overhaul of the tie bar may be necessary after a short period of time which is c ostly. This raises the need to analyze the heat transfer from the hot runner sys tem to the machine fix platen and the methods of isolating or minimizing the hea t transfer. In this case study, a photo lens article mould was used. The mould w as built with a direct hot runner nozzle system. Heat conduction from hot runner and machine screw to machine fix platen were studied based on either using high temperature heat insulating plate put in placed between the mould and the mould ing machine fix platen or drill cooling channels in the front mould clamping pla te. The high temperature insulator is very costly as it is made out of glass re inforced polymer composite material. Experimental results were obtained and anal yzed to find the best method to minimize the unwanted heat transfer using the ch eapest and most effective method.
文摘Apoptosis in the testis has two putative roles during normal spermatogenesis; limitation of the germ cell population to numbers that can be supported by the Sertoli cells, and, possibly, selective depletion of meiotic and postmeiotic abnormal germ cells. We investigated the demographic and biological correlates of the pro-apoptotic marker Fas and the anti-apoptotic marker Bcl-xL in sperm cells of fertile men. Six hundred and four men from Greenland, Poland and Ukraine were consecutively enrolled during their pregnant wife＇s antenatal visits. Semen analysis was performed as recommended by the World Health Organization. Immunofluorescence coupled to flow cytometry was utilized for detection of apoptotic markers in the sperm cell. DNA damage was assessed by flow cytometry using both the sperm chromatin structure assay （SCSA） and the terminal deoxynucleotidyl transferase dUTP nick end labelling （TUNEL） assay. The percentage of Fas-positive sperm cells was higher in men with high total sperm count （P〈O.01）, more motile sperms （P=-O.04） and fewer sperm head defects （P=-O.05）. These associations were consistent within and across study regions. Furthermore, testosterone, follicle-stimulating hormone （FSH） and sexual hormone-binding globulin （SHBG） were significantly negatively correlated with Fas within and across regions as well. The data indicated no association between the anti-apoptotic Bcl-xL marker and semen or personal characteristics. The finding of Fas-positive sperm cells associated with better semen quality in a cohort of spouses of pregnant women seems different from previous data obtained in infertile men and warrants further investigation to clarify the biological significance of sperm apoptotic markers.
基金financial support through UGC-JRF in Engineering and Technology(Vide-F No.10-01/2008 SA-I)。
文摘Objective:Andrographis paniculata is a well-known medicinal plant in Southeast Asia,India and China.The plant contains andrographolide(AN),a very important phytochemical used in various health problems.However,AN is low in oral absorption bioavailability of AN due to the rapid clearance and high protein binding capacity.Methods:The present study was aimed to develop a nano-phytovesicular formulation of semi-purified AN extracts from a naturally occurring phospholipid(soya phosphatidylcholine)in order to increase the oral absorption and antihyperglycemic activity in rats.Results:The nano-phyto vesicle of semi-purified AN extracts equivalent to 25 mg/kg AN significantly protected the hyperglycemic condition of rats.The in vitro and in vivo experiments results proved that the nano-phytovesicular system of plant extracts containing AN produced better oral absorption,bioavailability and improved antihyperglycemic activity compared with that of free AN at dose of 50 mg/kg.Conclusion:Hence,the prepared semi-purified extract nano-phytovesicular system is helpful in solving the problem of rapid clearance of AN.
基金This work was supported by DARPA MTO PRIGM-AIMS program agreement No.W911NF1820180.S.-G.L.and H.-S.P.were also supported by Korea Research Institute for Defense Technology Planning and Advancement(KRIT),F210001.The samples were fabricated at Birck Nanotechnology Center at Purdue University.
文摘Considering the evolution of rotation sensing and timing applications realized in micro-electro-mechanical systems(MEMS),flexural mode resonant shapes are outperformed by bulk acoustic wave(BAW)counterparts by achieving higher frequencies with both electrostatic and piezoelectric transduction.Within the 1-30 MHz range,which hosts BAW gyroscopes and timing references,piezoelectric and electrostatic MEMS have similar transduction efficiency.Although,when designed intelligently,electrostatic transduction allows self-alignment between electrodes and the resonator for various BAW modes,misalignment is inevitable regarding piezoelectric transduction of BAW modes that require electrode patterning.In this paper transverse piezoelectric actuation of[011]oriented single crystal lead magnesium niobate-lead titanate(PMN-PT)thin film disks are shown to excite the tangential mode and family of elliptical compound resonant modes,utilizing a self-aligned and unpatterned electrode that spans the entire disk surface.The resonant mode coupling is achieved by employing a unique property of[011]PMN-PT,where the in-plane piezoelectric coefficients have opposite signs.Fabricating 1-port disk transducers,RF reflection measurements are performed that demonstrate the compound mode family shapes in the 1-30 MHz range.Independent verification of mode transduction is achieved using in-plane displacement measurements with Polytec’s laser Doppler vibrometer(LDV).While the tangential mode achieves a 40°/s dithering rate at 335 kHz resonant frequency,the n=2 wine-glass mode achieves 11.46 nm tip displacement at 8.42 MHz resonant frequency on a radius of 60μm disk resonator in air.A single electrode resonator that can excite both tangential and wine-glass modes with such metrics lays the foundation for a BAW MEMS gyroscope with a built-in primary calibration stage.
文摘Accurate local temperature measurement at micro and nanoscales requires thermometry with high resolution because of ultra-low thermal transport.Among the various methods for measuring temperature,optical techniques have shown the most precise temperature detection,with resolutions reaching(-10^(-9) K).In this work,we present a nanomechanical device with nano-Kelvin resolution(-10^(-9) K)at room temperature and 1 atm.The device uses a 20 nm thick silicon nitride(SiN)membrane,forming an air chamber as the sensing area.The presented device has a temperature sensing area>1 mm^(2)for micro/nanoscale objects with reduced target placement constraints as the target can be placed anywhere on the>1 mm^(2)sensing area.The temperature resolution of the SiN membrane device is determined by deflection at the center of the membrane.The temperature resolution is inversely proportional to the membrane's stiffness,as detailed through analysis and measurements of stiffness and noise equivalent temperature(NET)in the pre-stressed SiN membrane.The achievable heat flow resolution of the membrane device is 100 pW,making it suitable for examining thermal transport on micro and nanoscales.
基金EU Horizon 2020 research and innovation program under grant agreement 3PEAT(Contract No.780502).
文摘We demonstrate a compact heterodyne Laser Doppler Vibrometer (LDV) based on the realization of optical frequency shift in the silicon nitride photonic integration platform (TriPleX). We theoretically study, and experimentally evaluate two different photonic integrated optical frequency shifters (OFSs), utilizing serrodyne and single- sideband (SSB) modulation. Both OFSs employ stress-optic modulators (SOMs) based on the non-resonant piezoelectrical actuation of lead zirconate titanate (PZT) thin- films, deposited on top of the silicon nitride waveguides with a wafer-scale process. To improve the modulation bandwidth of the SOMs we investigate a novel configuration of the electrodes used for the actuation, where both electrodes are placed on top of the PZT layer. Using this top-top electrode configuration we report frequency shift of 100 kHz and 2.5 MHz, and suppression ratio of the unwanted sidebands of 22.1 dB and 39 dB, using the serrodyne and the SSB OFS, respectively. The best performing SOM structure induces 0.25π peak-to-peak sinusoidal phase-shift with 156 mW power dissipation at 2.5 MHz. We use the SSB-OFS in our compact LDV system to demonstrate vibration measurements in the kHz regime. The system comprises a dual-polarization coherent detector built in the PolyBoard platform, utilizing hybrid integration of InP photodiodes (PDs). High quality LDV performance with measurement of vibration frequencies up to several hundreds of kHz and displacement resolution of 10 pm are supported with our system.
文摘Corrosion on a plate of magnesium alloy WZ73 in contact with 0.001 mol/L NaCl solution was analysed by long-range testing using the acoustic emission(AE)technique.At a distance d=1.66 m to the source,the Lamb wave propagation of resulting AE events was examined and used for corrosion source location.As a first step,pencil lead break test was carried out and corresponding Lamb wave analysis served as reference to the varying corrosion signals of lower intensity.Additionally,the plate was excited by a piezo transducer for imitating a selected corrosion event.For analysis of the propagating wave field,the plate surface was measured by a scanning laser Doppler vibrometer(SLDV),allowing a high-resolution corrosion signal reconstruction and path tracking of direct and reflected Lamb wave packets.Based on the SLDV results,a deeper understanding of the complex wave field propagation during the sensor-based corrosion analysis was achieved.
