Launched on December 28,2016,the Super View-1 satellite has operated for over 70 days at an altitude of 530km.The initial results of in-orbit commissioning show that the images from the Super View-1 satellite are clea...Launched on December 28,2016,the Super View-1 satellite has operated for over 70 days at an altitude of 530km.The initial results of in-orbit commissioning show that the images from the Super View-1 satellite are clear with radiation resolution reaching 11 bits pixel.The geospatial positioning accuracy without ground control pointing is5-8 m,the elevation relative accuracy is1 m.The maximum single scene can be60 km×70 km,enabling some 900。展开更多
Dr. Elaine M. Leshe of the recently published in the （Roggenbeck et al., 2016）, Henderson Award from the University of Alberta, who has Journal of Environmental Sciences is the recipient of the V. E. Society of Tox...Dr. Elaine M. Leshe of the recently published in the （Roggenbeck et al., 2016）, Henderson Award from the University of Alberta, who has Journal of Environmental Sciences is the recipient of the V. E. Society of Toxicology of Canada. ＂The award is designed to honour an individual who has made a significant contribution to the discipline of toxicology in Canada＂. （STC, 2016）展开更多
Dr. Samuel M. Cohen of the University of Nebraska Medical Center, who has recently published in the Journal of Environmental Sciences （Cohen et al., 2016）, is the recipient of the Merit Award from the Society of Tox...Dr. Samuel M. Cohen of the University of Nebraska Medical Center, who has recently published in the Journal of Environmental Sciences （Cohen et al., 2016）, is the recipient of the Merit Award from the Society of Toxicology （USA）. ＂The Merit Award is presented to a member of the Society of Toxicology in recognition of distinguished contributions to toxicology throughout an entire career in areas such as research, teaching, regulatory activities, consulting and service to the Society＂ （SOT, 2016a）. Dr. Cohen is professor at the University of Nebraska Medical Center, Omaha, Nebraska. He serves in the Depart- ment of Pathology and Microbiology, as well as the Eppley Institute for Research in Cancer. He also is staff pathologist with Nebraska Medicine, the Nebraska Orthopedics Hospital in Omaha. and the Bellevue Medical Center.展开更多
ZTE Corporation announced in September 2008 that its WiMAX 16e system passed Mobile WiMAX certification testing by the WiMAX Forum. This is another milestone
On November 3,CIIS President Su Ge and Vice President Dong Manyuan met with the delegation from the Danish Parliament headed by Soren Espersen,Chairman of its Foreign Policy Committee.The two sides exchanged views on ...On November 3,CIIS President Su Ge and Vice President Dong Manyuan met with the delegation from the Danish Parliament headed by Soren Espersen,Chairman of its Foreign Policy Committee.The two sides exchanged views on China-Europe relations and the DPRK nuclear issue,among other topics.Members of the delegation included展开更多
CHEN Yushun,an expert on aquaculture and aquatic ecosystems from the Institute of Hydrobiology,Chinese Academy of Sciences,received the Distinguished Service Award on August 23,2017 at the American Fisheries Society(A...CHEN Yushun,an expert on aquaculture and aquatic ecosystems from the Institute of Hydrobiology,Chinese Academy of Sciences,received the Distinguished Service Award on August 23,2017 at the American Fisheries Society(AFS)Annual Meeting in Tampa,Florida.The Distinguished Service Award recognizes outstanding contributions of time and energy for展开更多
The work of principal investigators （PIs） at the Institute of Neuroscience （ION） under the CAS Shanghai Institutes for Biological Sciences was applauded by an international evaluation panel that convened on June 9...The work of principal investigators （PIs） at the Institute of Neuroscience （ION） under the CAS Shanghai Institutes for Biological Sciences was applauded by an international evaluation panel that convened on June 9 and 10 at ION.展开更多
Adelegation led by CASC President Ma Xingrui visited Turkmenistan on August 8. President of Turkmenistan Gurbanguly Berdimuhamedov received the delegation in a warm, friendly atmosphere. President Gurbanguly Berdimuha...Adelegation led by CASC President Ma Xingrui visited Turkmenistan on August 8. President of Turkmenistan Gurbanguly Berdimuhamedov received the delegation in a warm, friendly atmosphere. President Gurbanguly Berdimuhamedov highly praised the remarkable achievements of China in the past 50 years. He said that展开更多
Huashan Hospital Clinical Laboratory, Shanghai, China, has been awarded an accreditation by the Commission on Laboratory Accreditation of the College of American Pathologists （CAP）, based on the results of a recent ...Huashan Hospital Clinical Laboratory, Shanghai, China, has been awarded an accreditation by the Commission on Laboratory Accreditation of the College of American Pathologists （CAP）, based on the results of a recent on-site inspection.展开更多
Freezing of gait is a significant and debilitating motor symptom often observed in individuals with Parkinson's disease.Resting-state functional magnetic resonance imaging,along with its multi-level feature indice...Freezing of gait is a significant and debilitating motor symptom often observed in individuals with Parkinson's disease.Resting-state functional magnetic resonance imaging,along with its multi-level feature indices,has provided a fresh perspective and valuable insight into the study of freezing of gait in Parkinson's disease.It has been revealed that Parkinson's disease is accompanied by widespread irregularities in inherent brain network activity.However,the effective integration of the multi-level indices of resting-state functional magnetic resonance imaging into clinical settings for the diagnosis of freezing of gait in Parkinson's disease remains a challenge.Although previous studies have demonstrated that radiomics can extract optimal features as biomarkers to identify or predict diseases,a knowledge gap still exists in the field of freezing of gait in Parkinson's disease.This cross-sectional study aimed to evaluate the ability of radiomics features based on multi-level indices of resting-state functional magnetic resonance imaging,along with clinical features,to distinguish between Parkinson's disease patients with and without freezing of gait.We recruited 28 patients with Parkinson's disease who had freezing of gait(15 men and 13 women,average age 63 years)and 30 patients with Parkinson's disease who had no freezing of gait(16 men and 14 women,average age 64 years).Magnetic resonance imaging scans were obtained using a 3.0T scanner to extract the mean amplitude of low-frequency fluctuations,mean regional homogeneity,and degree centrality.Neurological and clinical characteristics were also evaluated.We used the least absolute shrinkage and selection operator algorithm to extract features and established feedforward neural network models based solely on resting-state functional magnetic resonance imaging indicators.We then performed predictive analysis of three distinct groups based on resting-state functional magnetic resonance imaging indicators indicators combined with clinical features.Subsequently,we conducted 100 additional five-fold cross-validations to determine the most effective model for each classification task and evaluated the performance of the model using the area under the receiver operating characteristic curve.The results showed that when differentiating patients with Parkinson's disease who had freezing of gait from those who did not have freezing of gait,or from healthy controls,the models using only the mean regional homogeneity values achieved the highest area under the receiver operating characteristic curve values of 0.750(with an accuracy of 70.9%)and 0.759(with an accuracy of 65.3%),respectively.When classifying patients with Parkinson's disease who had freezing of gait from those who had no freezing of gait,the model using the mean amplitude of low-frequency fluctuation values combined with two clinical features achieved the highest area under the receiver operating characteristic curve of 0.847(with an accuracy of 74.3%).The most significant features for patients with Parkinson's disease who had freezing of gait were amplitude of low-frequency fluctuation alterations in the left parahippocampal gyrus and two clinical characteristics:Montreal Cognitive Assessment and Hamilton Depression Scale scores.Our findings suggest that radiomics features derived from resting-state functional magnetic resonance imaging indices and clinical information can serve as valuable indices for the identification of freezing of gait in Parkinson's disease.展开更多
WHEN Chen Lijuan, a girl from a poor mountainous area in Zanhuang County, Hebei Province, lost both her father and mother at the age of three, she went to live with her elderly grandmother. Her straitened circumstance...WHEN Chen Lijuan, a girl from a poor mountainous area in Zanhuang County, Hebei Province, lost both her father and mother at the age of three, she went to live with her elderly grandmother. Her straitened circumstances made her strong. Even at the tender age of five, the little girl knew to be a good helper to her grandma.展开更多
On the occasion of the opening ceremony of the 19th National Congress of the Communist Party of China,the Chinese People’s Association for Friendship with Foreign Countries received many congratulatory letters from o...On the occasion of the opening ceremony of the 19th National Congress of the Communist Party of China,the Chinese People’s Association for Friendship with Foreign Countries received many congratulatory letters from organizations dedicated to friendship with China,including the US-China Peoples Friendship Association,Federation des Associations Franco-Chinoises(the Federation of French-Chinese Associations),Arbeitsgemeischaft Deutscher ChinaGesellschaften(the Association for German-Chinese Friendship),展开更多
FOUR days after the adjournment of the 8th Chinese Women’s National Congress, President Jiang Zemin received all the newly-elected members of the executive committee and several deputies at Zhongnanhai. Gu Xiulian, V...FOUR days after the adjournment of the 8th Chinese Women’s National Congress, President Jiang Zemin received all the newly-elected members of the executive committee and several deputies at Zhongnanhai. Gu Xiulian, Vice President and the First Member of the Secretariat of the All-China Women’s Federation (ACWF), briefed Jiang on the congress. She said deputies had reached consensus on certain issues: that women should capitalize on their abilities in the overall social participation; that the uplifting of women’s quality should be seen as a long-term strategy; and that women’s development requires a supportive social environment. Jiang Zemin listened attentively to the speeches delivered by seven deputies. Jiang Daguo, president of Hubei Provincial Women’s Federation, from one of展开更多
This paper highlights the crucial role of Indonesia’s GNSS receiver network in advancing Equatorial Plasma Bubble(EPB)studies in Southeast and East Asia,as ionospheric irregularities within EPB can disrupt GNSS signa...This paper highlights the crucial role of Indonesia’s GNSS receiver network in advancing Equatorial Plasma Bubble(EPB)studies in Southeast and East Asia,as ionospheric irregularities within EPB can disrupt GNSS signals and degrade positioning accuracy.Managed by the Indonesian Geospatial Information Agency(BIG),the Indonesia Continuously Operating Reference Station(Ina-CORS)network comprises over 300 GNSS receivers spanning equatorial to southern low-latitude regions.Ina-CORS is uniquely situated to monitor EPB generation,zonal drift,and dissipation across Southeast Asia.We provide a practical tool for EPB research,by sharing two-dimensional rate of Total Electron Content(TEC)change index(ROTI)derived from this network.We generate ROTI maps with a 10-minute resolution,and samples from May 2024 are publicly available for further scientific research.Two preliminary findings from the ROTI maps of Ina-CORS are noteworthy.First,the Ina-CORS ROTI maps reveal that the irregularities within a broader EPB structure persist longer,increasing the potential for these irregularities to migrate farther eastward.Second,we demonstrate that combined ROTI maps from Ina-CORS and GNSS receivers in East Asia and Australia can be used to monitor the development of ionospheric irregularities in Southeast and East Asia.We have demonstrated the combined ROTI maps to capture the development of ionospheric irregularities in the Southeast/East Asian sector during the G5 Geomagnetic Storm on May 11,2024.We observed simultaneous ionospheric irregularities in Japan and Australia,respectively propagating northwestward and southwestward,before midnight,whereas Southeast Asia’s equatorial and low-latitude regions exhibited irregularities post-midnight.By sharing ROTI maps from Indonesia and integrating them with regional GNSS networks,researchers can conduct comprehensive EPB studies,enhancing the understanding of EPB behavior across Southeast and East Asia and contributing significantly to ionospheric research.展开更多
The Red Sea-Gulf of Suez-Cairo-Alexandria Clysmic-Trend in northern Egypt is the main earthquake zone in the country,with a moderate-to-high seismic hazard and a history of significant earthquakes caused by rifting an...The Red Sea-Gulf of Suez-Cairo-Alexandria Clysmic-Trend in northern Egypt is the main earthquake zone in the country,with a moderate-to-high seismic hazard and a history of significant earthquakes caused by rifting and active faulting.To improve our understanding of the tectonic and seismic processes in this area,more comprehensive imaging of the crustal structure is required.This can be achieved by increasing the number of receiver functions(RFs)recorded by the seismic stations in northern Egypt and the southeastern Mediterranean.Data handling and processing should also be automated to increase process efficiency.In this study,we developed a capsule neural network for automated selection of RFs.The model was trained on a dataset containing RFs(both selected and unselected)from five broadband stations in northern Egypt.Stations SLM,SIWA,KOT,NBNS,and NKL are located in the unstable shelf region of Egypt,where limited knowledge of the deep crustal structure is available.The proposed capsule neural network achieved an average precision of 80%on the test set.The automated selection of RFs using a capsule neural network has the potential to significantly improve the efficiency and accuracy of RF analysis,as demonstrated by the stacking test.This could lead to a better understanding of crustal structure and tectonic processes in northern Egypt and the southeastern Mediterranean.展开更多
In DSP-based SerDes application,it is essential for AFE to implement a pre-ADC equalization to provide a better sig-nal for ADC and DSP.To meet the various equalization requirements of different channel and transmitte...In DSP-based SerDes application,it is essential for AFE to implement a pre-ADC equalization to provide a better sig-nal for ADC and DSP.To meet the various equalization requirements of different channel and transmitter configurations,this paper presents a 112 Gbps DSP-Based PAM4 SerDes receiver with a wide band equalization tuning AFE.The AFE is realized by implementing source degeneration transconductance,feedforward high-pass branch and inductive feedback peaking TIA.The AFE offers a flexible equalization gain tuning of up to 17.5 dB at Nyquist frequency without affecting the DC gain.With the pro-posed AFE,the receiver demonstrates eye opening after digital FIR equalization and achieves 6×10^(-9) BER with a 29.6 dB inser-tion loss channel.展开更多
Objectives:SocialNetworkAddiction(SNA)is becoming increasingly prevalent among college students;however,there remains a lack of consensus regarding the measurement tools and their optimal cutoff score.This study aims ...Objectives:SocialNetworkAddiction(SNA)is becoming increasingly prevalent among college students;however,there remains a lack of consensus regarding the measurement tools and their optimal cutoff score.This study aims to validate the 21-item SocialNetwork Addiction Scale-Chinese(SNAS-C)in its Chinese version and to determine its optimal cutoff score for identifying potential SNA cases within the college student population.Methods:A crosssectional survey was conducted,recruiting 3387 college students.Latent profile analysis(LPA)and receiver operating characteristic(ROC)curve analysis were employed to establish the optimal cutoff score for the validated 21-item SNAS-C.Results:Three profile models were selected based on multiple statistical criteria,classifying participants into low-risk,moderate-risk,and high-risk groups.The highest-risk group was defined as“positive”for SNA,while the remaining groups were considered“negative”,serving as the reference standard for ROC analysis.The optimal cutoff score was determined to be 72(sensitivity:98.2%,specificity:96.86%),with an overall classification accuracy of 97.0%.The“positive”group reported significantly higher frequency of social network usage,greater digitalmedia dependence scores,and a higher incidence of network addiction.Conclusion:This study identified the optimal cutoff score for the SNAS-C as≥72,demonstrating high sensitivity,specificity,and diagnostic accuracy.This threshold effectively distinguishes between high-risk and low-risk SNA.展开更多
A Receiver Operating Characteristic(ROC)analysis of a power is important and useful in clinical trials.A Classical Conditional Power(CCP)is a probability of a classical rejection region given values of true treatment ...A Receiver Operating Characteristic(ROC)analysis of a power is important and useful in clinical trials.A Classical Conditional Power(CCP)is a probability of a classical rejection region given values of true treatment effect and interim result.For hypotheses and reversed hypotheses under normal models,we obtain analytical expressions of the ROC curves of the CCP,find optimal ROC curves of the CCP,investigate the superiority of the ROC curves of the CCP,calculate critical values of the False Positive Rate(FPR),True Positive Rate(TPR),and cutoff of the optimal CCP,and give go/no go decisions at the interim of the optimal CCP.In addition,extensive numerical experiments are carried out to exemplify our theoretical results.Finally,a real data example is performed to illustrate the go/no go decisions of the optimal CCP.展开更多
文摘Launched on December 28,2016,the Super View-1 satellite has operated for over 70 days at an altitude of 530km.The initial results of in-orbit commissioning show that the images from the Super View-1 satellite are clear with radiation resolution reaching 11 bits pixel.The geospatial positioning accuracy without ground control pointing is5-8 m,the elevation relative accuracy is1 m.The maximum single scene can be60 km×70 km,enabling some 900。
文摘Dr. Elaine M. Leshe of the recently published in the （Roggenbeck et al., 2016）, Henderson Award from the University of Alberta, who has Journal of Environmental Sciences is the recipient of the V. E. Society of Toxicology of Canada. ＂The award is designed to honour an individual who has made a significant contribution to the discipline of toxicology in Canada＂. （STC, 2016）
文摘Dr. Samuel M. Cohen of the University of Nebraska Medical Center, who has recently published in the Journal of Environmental Sciences （Cohen et al., 2016）, is the recipient of the Merit Award from the Society of Toxicology （USA）. ＂The Merit Award is presented to a member of the Society of Toxicology in recognition of distinguished contributions to toxicology throughout an entire career in areas such as research, teaching, regulatory activities, consulting and service to the Society＂ （SOT, 2016a）. Dr. Cohen is professor at the University of Nebraska Medical Center, Omaha, Nebraska. He serves in the Depart- ment of Pathology and Microbiology, as well as the Eppley Institute for Research in Cancer. He also is staff pathologist with Nebraska Medicine, the Nebraska Orthopedics Hospital in Omaha. and the Bellevue Medical Center.
文摘ZTE Corporation announced in September 2008 that its WiMAX 16e system passed Mobile WiMAX certification testing by the WiMAX Forum. This is another milestone
文摘On November 3,CIIS President Su Ge and Vice President Dong Manyuan met with the delegation from the Danish Parliament headed by Soren Espersen,Chairman of its Foreign Policy Committee.The two sides exchanged views on China-Europe relations and the DPRK nuclear issue,among other topics.Members of the delegation included
文摘CHEN Yushun,an expert on aquaculture and aquatic ecosystems from the Institute of Hydrobiology,Chinese Academy of Sciences,received the Distinguished Service Award on August 23,2017 at the American Fisheries Society(AFS)Annual Meeting in Tampa,Florida.The Distinguished Service Award recognizes outstanding contributions of time and energy for
文摘The work of principal investigators （PIs） at the Institute of Neuroscience （ION） under the CAS Shanghai Institutes for Biological Sciences was applauded by an international evaluation panel that convened on June 9 and 10 at ION.
文摘The Chinese government will earmark 4.8 billion yuan (or US$ 615.4 million) in the next five years for improving the infrastructure facilities at CAS.
文摘Adelegation led by CASC President Ma Xingrui visited Turkmenistan on August 8. President of Turkmenistan Gurbanguly Berdimuhamedov received the delegation in a warm, friendly atmosphere. President Gurbanguly Berdimuhamedov highly praised the remarkable achievements of China in the past 50 years. He said that
文摘Huashan Hospital Clinical Laboratory, Shanghai, China, has been awarded an accreditation by the Commission on Laboratory Accreditation of the College of American Pathologists （CAP）, based on the results of a recent on-site inspection.
基金supported by the National Natural Science Foundation of China,No.82071909(to GF)the Natural Science Foundation of Liaoning Province,No.2023-MS-07(to HL)。
文摘Freezing of gait is a significant and debilitating motor symptom often observed in individuals with Parkinson's disease.Resting-state functional magnetic resonance imaging,along with its multi-level feature indices,has provided a fresh perspective and valuable insight into the study of freezing of gait in Parkinson's disease.It has been revealed that Parkinson's disease is accompanied by widespread irregularities in inherent brain network activity.However,the effective integration of the multi-level indices of resting-state functional magnetic resonance imaging into clinical settings for the diagnosis of freezing of gait in Parkinson's disease remains a challenge.Although previous studies have demonstrated that radiomics can extract optimal features as biomarkers to identify or predict diseases,a knowledge gap still exists in the field of freezing of gait in Parkinson's disease.This cross-sectional study aimed to evaluate the ability of radiomics features based on multi-level indices of resting-state functional magnetic resonance imaging,along with clinical features,to distinguish between Parkinson's disease patients with and without freezing of gait.We recruited 28 patients with Parkinson's disease who had freezing of gait(15 men and 13 women,average age 63 years)and 30 patients with Parkinson's disease who had no freezing of gait(16 men and 14 women,average age 64 years).Magnetic resonance imaging scans were obtained using a 3.0T scanner to extract the mean amplitude of low-frequency fluctuations,mean regional homogeneity,and degree centrality.Neurological and clinical characteristics were also evaluated.We used the least absolute shrinkage and selection operator algorithm to extract features and established feedforward neural network models based solely on resting-state functional magnetic resonance imaging indicators.We then performed predictive analysis of three distinct groups based on resting-state functional magnetic resonance imaging indicators indicators combined with clinical features.Subsequently,we conducted 100 additional five-fold cross-validations to determine the most effective model for each classification task and evaluated the performance of the model using the area under the receiver operating characteristic curve.The results showed that when differentiating patients with Parkinson's disease who had freezing of gait from those who did not have freezing of gait,or from healthy controls,the models using only the mean regional homogeneity values achieved the highest area under the receiver operating characteristic curve values of 0.750(with an accuracy of 70.9%)and 0.759(with an accuracy of 65.3%),respectively.When classifying patients with Parkinson's disease who had freezing of gait from those who had no freezing of gait,the model using the mean amplitude of low-frequency fluctuation values combined with two clinical features achieved the highest area under the receiver operating characteristic curve of 0.847(with an accuracy of 74.3%).The most significant features for patients with Parkinson's disease who had freezing of gait were amplitude of low-frequency fluctuation alterations in the left parahippocampal gyrus and two clinical characteristics:Montreal Cognitive Assessment and Hamilton Depression Scale scores.Our findings suggest that radiomics features derived from resting-state functional magnetic resonance imaging indices and clinical information can serve as valuable indices for the identification of freezing of gait in Parkinson's disease.
文摘WHEN Chen Lijuan, a girl from a poor mountainous area in Zanhuang County, Hebei Province, lost both her father and mother at the age of three, she went to live with her elderly grandmother. Her straitened circumstances made her strong. Even at the tender age of five, the little girl knew to be a good helper to her grandma.
文摘On the occasion of the opening ceremony of the 19th National Congress of the Communist Party of China,the Chinese People’s Association for Friendship with Foreign Countries received many congratulatory letters from organizations dedicated to friendship with China,including the US-China Peoples Friendship Association,Federation des Associations Franco-Chinoises(the Federation of French-Chinese Associations),Arbeitsgemeischaft Deutscher ChinaGesellschaften(the Association for German-Chinese Friendship),
文摘FOUR days after the adjournment of the 8th Chinese Women’s National Congress, President Jiang Zemin received all the newly-elected members of the executive committee and several deputies at Zhongnanhai. Gu Xiulian, Vice President and the First Member of the Secretariat of the All-China Women’s Federation (ACWF), briefed Jiang on the congress. She said deputies had reached consensus on certain issues: that women should capitalize on their abilities in the overall social participation; that the uplifting of women’s quality should be seen as a long-term strategy; and that women’s development requires a supportive social environment. Jiang Zemin listened attentively to the speeches delivered by seven deputies. Jiang Daguo, president of Hubei Provincial Women’s Federation, from one of
基金JSPS KAKENHI Grant Number16H06286 supports global GNSS ionospheric maps (TEC,ROTI,and detrended TEC maps) developed by the Institute for SpaceEarth Environmental Research (ISEE) of Nagoya Universitysupport of the 2024 JASSO Follow-up Research Fellowship Program for a 90-day visiting research at the Institute for Space-Earth Environmental Research (ISEE),Nagoya University+3 种基金the support received from Telkom University under the“Skema Penelitian Terapan Periode I Tahun Anggaran 2024”the Memorandum of Understanding for Research Collaboration on Regional Ionospheric Observation (No:092/SAM3/TE-DEK/2021)the National Institute of Information and Communications Technology (NICT) International Exchange Program 2024-2025(No.2024-007)support for a one-year visiting research at Hokkaido University
文摘This paper highlights the crucial role of Indonesia’s GNSS receiver network in advancing Equatorial Plasma Bubble(EPB)studies in Southeast and East Asia,as ionospheric irregularities within EPB can disrupt GNSS signals and degrade positioning accuracy.Managed by the Indonesian Geospatial Information Agency(BIG),the Indonesia Continuously Operating Reference Station(Ina-CORS)network comprises over 300 GNSS receivers spanning equatorial to southern low-latitude regions.Ina-CORS is uniquely situated to monitor EPB generation,zonal drift,and dissipation across Southeast Asia.We provide a practical tool for EPB research,by sharing two-dimensional rate of Total Electron Content(TEC)change index(ROTI)derived from this network.We generate ROTI maps with a 10-minute resolution,and samples from May 2024 are publicly available for further scientific research.Two preliminary findings from the ROTI maps of Ina-CORS are noteworthy.First,the Ina-CORS ROTI maps reveal that the irregularities within a broader EPB structure persist longer,increasing the potential for these irregularities to migrate farther eastward.Second,we demonstrate that combined ROTI maps from Ina-CORS and GNSS receivers in East Asia and Australia can be used to monitor the development of ionospheric irregularities in Southeast and East Asia.We have demonstrated the combined ROTI maps to capture the development of ionospheric irregularities in the Southeast/East Asian sector during the G5 Geomagnetic Storm on May 11,2024.We observed simultaneous ionospheric irregularities in Japan and Australia,respectively propagating northwestward and southwestward,before midnight,whereas Southeast Asia’s equatorial and low-latitude regions exhibited irregularities post-midnight.By sharing ROTI maps from Indonesia and integrating them with regional GNSS networks,researchers can conduct comprehensive EPB studies,enhancing the understanding of EPB behavior across Southeast and East Asia and contributing significantly to ionospheric research.
文摘The Red Sea-Gulf of Suez-Cairo-Alexandria Clysmic-Trend in northern Egypt is the main earthquake zone in the country,with a moderate-to-high seismic hazard and a history of significant earthquakes caused by rifting and active faulting.To improve our understanding of the tectonic and seismic processes in this area,more comprehensive imaging of the crustal structure is required.This can be achieved by increasing the number of receiver functions(RFs)recorded by the seismic stations in northern Egypt and the southeastern Mediterranean.Data handling and processing should also be automated to increase process efficiency.In this study,we developed a capsule neural network for automated selection of RFs.The model was trained on a dataset containing RFs(both selected and unselected)from five broadband stations in northern Egypt.Stations SLM,SIWA,KOT,NBNS,and NKL are located in the unstable shelf region of Egypt,where limited knowledge of the deep crustal structure is available.The proposed capsule neural network achieved an average precision of 80%on the test set.The automated selection of RFs using a capsule neural network has the potential to significantly improve the efficiency and accuracy of RF analysis,as demonstrated by the stacking test.This could lead to a better understanding of crustal structure and tectonic processes in northern Egypt and the southeastern Mediterranean.
基金supported by National Key R&D Program of China No.2022YFB2803401.
文摘In DSP-based SerDes application,it is essential for AFE to implement a pre-ADC equalization to provide a better sig-nal for ADC and DSP.To meet the various equalization requirements of different channel and transmitter configurations,this paper presents a 112 Gbps DSP-Based PAM4 SerDes receiver with a wide band equalization tuning AFE.The AFE is realized by implementing source degeneration transconductance,feedforward high-pass branch and inductive feedback peaking TIA.The AFE offers a flexible equalization gain tuning of up to 17.5 dB at Nyquist frequency without affecting the DC gain.With the pro-posed AFE,the receiver demonstrates eye opening after digital FIR equalization and achieves 6×10^(-9) BER with a 29.6 dB inser-tion loss channel.
基金supported by the National Natural Science Foundation of China(Grant No.72364006).
文摘Objectives:SocialNetworkAddiction(SNA)is becoming increasingly prevalent among college students;however,there remains a lack of consensus regarding the measurement tools and their optimal cutoff score.This study aims to validate the 21-item SocialNetwork Addiction Scale-Chinese(SNAS-C)in its Chinese version and to determine its optimal cutoff score for identifying potential SNA cases within the college student population.Methods:A crosssectional survey was conducted,recruiting 3387 college students.Latent profile analysis(LPA)and receiver operating characteristic(ROC)curve analysis were employed to establish the optimal cutoff score for the validated 21-item SNAS-C.Results:Three profile models were selected based on multiple statistical criteria,classifying participants into low-risk,moderate-risk,and high-risk groups.The highest-risk group was defined as“positive”for SNA,while the remaining groups were considered“negative”,serving as the reference standard for ROC analysis.The optimal cutoff score was determined to be 72(sensitivity:98.2%,specificity:96.86%),with an overall classification accuracy of 97.0%.The“positive”group reported significantly higher frequency of social network usage,greater digitalmedia dependence scores,and a higher incidence of network addiction.Conclusion:This study identified the optimal cutoff score for the SNAS-C as≥72,demonstrating high sensitivity,specificity,and diagnostic accuracy.This threshold effectively distinguishes between high-risk and low-risk SNA.
基金supported by the National Social Science Fund of China(Grand No.21XTJ001).
文摘A Receiver Operating Characteristic(ROC)analysis of a power is important and useful in clinical trials.A Classical Conditional Power(CCP)is a probability of a classical rejection region given values of true treatment effect and interim result.For hypotheses and reversed hypotheses under normal models,we obtain analytical expressions of the ROC curves of the CCP,find optimal ROC curves of the CCP,investigate the superiority of the ROC curves of the CCP,calculate critical values of the False Positive Rate(FPR),True Positive Rate(TPR),and cutoff of the optimal CCP,and give go/no go decisions at the interim of the optimal CCP.In addition,extensive numerical experiments are carried out to exemplify our theoretical results.Finally,a real data example is performed to illustrate the go/no go decisions of the optimal CCP.
