This article is a part of a larger study called The Abstract Truth of Media focused on the topic of the fictional media content opinions presented and perceived as truth.It will explore the abstract nature of truth in...This article is a part of a larger study called The Abstract Truth of Media focused on the topic of the fictional media content opinions presented and perceived as truth.It will explore the abstract nature of truth in online media and its different forms.These media truths are types of fictional stories with certain effects on the public rather than a truthful presentation of the facts.Thus,the end goal of mass media today is not to tell the truth,but to create moral communities based on common experience and beliefs.Articles,opinions,and news in media are seen as a narrative strategy that can be understood only through storytelling analysis.Here the focus is on the understanding of Truth and Untruth in online media as well as the connection of Internet media technology with the increase of disinformation online.The new media model creates hostile groups instead of generating consent for the nation-state,the new online media model within through,Pseudo-communication,manipulation,delusion,lies,propaganda,and deliberate causing of moral anger.“The end of the truth”means that the truth on the Internet is lost among the vast amount of information and the lack of regulation regarding the correctness of the published data.Instead of truth,media researchers formally talk about post-truth,fake news,and“alternative facts”.Truth on the Internet is more like“Truthiness”or a belief that a statement is true based on the intuition or understanding of individuals,regardless of evidence,logic or facts.The subject of research is the connection between every new technology in mass media and the truth of the information and the effects on the consensus in society.Since the beginning of the 21st century,misinformation on the Internet has increased with the development of online media and social networks,and it is a problem of social peace and consent in every country.展开更多
Rumor Control(RC),aimed at minimizing the spread of rumors in social networks,is of paramount importance,as the spread of rumors can lead to significant economic losses,societal disruptions,and even widespread panic.T...Rumor Control(RC),aimed at minimizing the spread of rumors in social networks,is of paramount importance,as the spread of rumors can lead to significant economic losses,societal disruptions,and even widespread panic.The RC problem has garnered extensive research attention,however,most existing solutions for rumor control face a trade-off between efficiency and effectiveness,which limits their practical application in real-world scenarios.In this light,this paper studies the Truth-spreading-based Rumor Control(TRC)problem,and introduces the Subgraphbased Greedy algorithm Optimized with CELF(SGOC),which employs subgraph techniques and the CELF strategy,as the basic solution for the TRC problem.To improve the performance of SGOC,we carefully design a shortest path length dictionary SPR and an Immune Nodes Set(INS),leading to the Shortest Path-Based Rumor Control(SPRC)algorithm.To further enhance the SPRC algorithm,we develop a pruning method that accelerates the construction process of INS,proposing the Improved Shortest Path-Based Rumor Control(ISPRC)algorithm,which demonstrates superior efficiency compared to both SPRC and SGOC.Extensive experiments conducted on five real-world datasets,demonstrate the effectiveness and efficiency of the proposed algorithms.展开更多
Unmanned and aerial systems as interactors among different system components for communications,have opened up great opportunities for truth data discovery in Mobile Crowd Sensing(MCS)which has not been properly solve...Unmanned and aerial systems as interactors among different system components for communications,have opened up great opportunities for truth data discovery in Mobile Crowd Sensing(MCS)which has not been properly solved in the literature.In this paper,an Unmanned Aerial Vehicles-supported Intelligent Truth Discovery(UAV-ITD)scheme is proposed to obtain truth data at low-cost communications for MCS.The main innovations of the UAV-ITD scheme are as follows:(1)UAV-ITD scheme takes the first step in employing UAV joint Deep Matrix Factorization(DMF)to discover truth data based on the trust mechanism for an Information Elicitation Without Verification(IEWV)problem in MCS.(2)This paper introduces a truth data discovery scheme for the first time that only needs to collect a part of n data samples to infer the data of the entire network with high accuracy,which saves more communication costs than most previous data collection schemes,where they collect n or kn data samples.Finally,we conducted extensive experiments to evaluate the UAV-ITD scheme.The results show that compared with previous schemes,our scheme can reduce estimated truth error by 52.25%–96.09%,increase the accuracy of workers’trust evaluation by 0.68–61.82 times,and save recruitment costs by 24.08%–54.15%in truth data discovery.展开更多
With the rapid development of the Internet and the widespread popularity of We Media in the 21st century,news communication has entered the post truth era.In the post truth era,truth and logic are often marginalized i...With the rapid development of the Internet and the widespread popularity of We Media in the 21st century,news communication has entered the post truth era.In the post truth era,truth and logic are often marginalized in the process of information dissemination,while emotional agitation becomes an important force that dominates public opinion.College students,as the most active and influential online audience in contemporary social media usage,have a profound impact on guiding and promoting the information environment of the entire society through their online behavior and ideological shaping.This article aims to explore the role and identity transformation of college students’online audiences on social media in the context of the post truth era,as well as the value characteristics behind it.It also explores how to correctly guide college students to participate in the voice of social news,promote their physical and mental health development,and cultivate correct values.展开更多
With the rocketing progress of the Internet, it is easier for people to get information about the objects that they are interested in. However, this information usually has conflicts. In order to resolve conflicts and...With the rocketing progress of the Internet, it is easier for people to get information about the objects that they are interested in. However, this information usually has conflicts. In order to resolve conflicts and get the true information, truth discovery has been proposed and received widespread attention. Many algorithms have been proposed to adapt to different scenarios. This paper aims to investigate these algorithms and summarize them from the perspective of algorithm models and specific concepts. Some classic datasets and evaluation metrics are given in this paper. Some future directions for readers are also provided to better understand the field of truth discovery.展开更多
The ideal goal to cultivate creative talents who "seek truth","strive for kindness" and "adore aesthetics " and are equipped with "perfect personality" should be achieved,which ...The ideal goal to cultivate creative talents who "seek truth","strive for kindness" and "adore aesthetics " and are equipped with "perfect personality" should be achieved,which is expected to reach brand-new circumstances of "humans development and construction of completeness" and must and should explore "Truth","Kindness" and "Aesthetics" in Chinese education.This article is meant to explore "truth" of Chinese(language,article,literature) in the intellectual education from cognitive science and to promote students to get into quality of exploration;they should explore "kindness" in the moral education in Chinese(language,article,literature) from ethics,which is to urge wakefulness of students' moral consciousness;in addition,"aesthetics" in Chinese(language,article,literature) from aesthetic education is to spur students to construct free soul.展开更多
The conception of truth-making,albeit in a rudimentary form,could already be discerned in the writings of G.E.Moore and E.Husserl in the early 1900s.A few years later it was more extensively exploited by William James...The conception of truth-making,albeit in a rudimentary form,could already be discerned in the writings of G.E.Moore and E.Husserl in the early 1900s.A few years later it was more extensively exploited by William James.It was Wittgenstein,however,who gave the concept a precise meaning.In 1913/1914 Wittgenstein advanced a theory of possible worlds,only one of which was real.Every proposition suggests a part of a possible world which does or does not correspond to parts of the real world.In the first case the proposition is true,in the second case false.Moreover,the part of the real world makes the sentence true.This part is a truth-maker,and the sentence is a truth-bearer.Surprisingly enough,Wittgenstein’s concept of truth-making had its family resemblance with William James’s conception of truth.In 1915 Wittgenstein stopped using the concept of truth-making-it was also not mentioned in the Tractatus.Unfortunately,Russell did not notice this and in 1918 he adopted the concept of truth-making.In the 1930s,it was used by some second generation analytic philosophers(Schlick,Stebbing,and Wisdom).However,it became rather popular among analytic philosophers only in the 1980s.展开更多
Man can choose the truth;he can surrender to it,testify to it through doubt and anguish,or he can remain indifferent or renegade.In post-truth times,hermeneutics,in its tragic sense,is constituted as an antidote that ...Man can choose the truth;he can surrender to it,testify to it through doubt and anguish,or he can remain indifferent or renegade.In post-truth times,hermeneutics,in its tragic sense,is constituted as an antidote that surpasses the abyss of nothingness and absurdity,in pharmakon to recover and regain,through the exercise of freedom and a renewed encounter with Christianity,the meaning of things.Fake news,information bubbles,and the tyranny of digital companies dilute the truth into information.Philosophy has been alive with the effective presence of truth,of that truth that,as Vico said,is great and conquers everything.If the original character of truth has been lost,it is worth asking since when and why,and what historical and intellectual processes have led to the notion of post-truth.When,in human history,a notion of such importance as the truth leaves an empty place,it does not take long for that emptiness to be filled.Philosophy deals with the truth;it is the first object that man seeks and the ultimate meaning of asking every question.Probing the sources of post-truth in Nietzsche,Heidegger,and Pareyson will shed light on the possibility of saving truth.To have the truth in the post-truth era is to have a flash of light that affects the conception of politics,science,anthropology,psychology,metaphysics,aesthetics,and the sociology.展开更多
Because ambient seismic noise provides estimated Green’s function （EGF） between two sites with high accuracy, Rayleigh wave propagation along the path connecting the two sites is well resolved. Therefore, earthquak...Because ambient seismic noise provides estimated Green’s function （EGF） between two sites with high accuracy, Rayleigh wave propagation along the path connecting the two sites is well resolved. Therefore, earthquakes which are close to one seismic station can be well located with calibration extracting from EGF. We test two algorithms in locating the 1998 Zhangbei earthquake, one algorithm is waveform-based, and the other is traveltime-based. We first compute EGF between station ZHB （a station about 40 km away from the epicenter） and five IC/IRIS stations. With the waveform-based approach, we calculate 1D synthetic single-force Green’s functions between ZHB and other four stations, and obtain traveltime corrections by correlating synthetic Green’s functions with EGFs in period band of 10–30 s. Then we locate the earthquake by minimizing the differential travel times between observed earthquake waveform and the 1D synthetic earthquake waveforms computed with focal mechanism provided by Global CMT after traveltime correction from EGFs. This waveform-based approach yields a location which error is about 13 km away from the location observed with InSAR. With the traveltime-based approach, we begin with measuring group velocity from EGFs as well as group arrival time on observed earthquake waveforms, and then locate the earthquake by minimizing the difference between observed group arrival time and arrival time measured on EGFs. This traveltime-based approach yields accuracy of 3 km, Therefore it is feasible to achieve GT5 （ground truth location with accuracy 5 km） with ambient seismic noises. The less accuracy of the waveform-based approach was mainly caused by uncertainty of focal mechanism.展开更多
Endgame,the most difficult and elusive play by Samuel Beckett,sketches the post-war social spirit and norm.Absurd as the plot is,this paper is aimed at disclosing the truth of the world,of life,and of human nature cov...Endgame,the most difficult and elusive play by Samuel Beckett,sketches the post-war social spirit and norm.Absurd as the plot is,this paper is aimed at disclosing the truth of the world,of life,and of human nature covered in the setting of stage,the cyclical actions and the philosophic conversation.展开更多
Air pollution has become a global concern for many years.Vehicular crowdsensing systems make it possible to monitor air quality at a fine granularity.To better utilize the sensory data with varying credibility,truth d...Air pollution has become a global concern for many years.Vehicular crowdsensing systems make it possible to monitor air quality at a fine granularity.To better utilize the sensory data with varying credibility,truth discovery frameworks are introduced.However,in urban cities,there is a significant difference in traffic volumes of streets or blocks,which leads to a data sparsity problem for truth discovery.Protecting the privacy of participant vehicles is also a crucial task.We first present a data masking-based privacy-preserving truth discovery framework,which incorporates spatial and temporal correlations to solve the sparsity problem.To further improve the truth discovery performance of the presented framework,an enhanced version is proposed with anonymous communication and data perturbation.Both frameworks are more lightweight than the existing cryptography-based methods.We also evaluate the work with simulations and fully discuss the performance and possible extensions.展开更多
Objective: This study aims to investigate the truth-telling status and the relevant factors of esophageal squamous cell carcinoma(ESCC) patients in Henan, China.Methods: A cross-sectional study from April to June 2015...Objective: This study aims to investigate the truth-telling status and the relevant factors of esophageal squamous cell carcinoma(ESCC) patients in Henan, China.Methods: A cross-sectional study from April to June 2015 using questionnaires was given to 301 family members of hospitalized ESCC patients based in three affiliated hospitals of Zhengzhou University(i.e., The First Hospital, The Second Hospital, and Tumor Hospital) and Anyang Tumor Hospital.Results: Among the 41.9%(126/301) hospitalized ESCC patients who knew of their true diagnoses, only 4.0% patients were informed by their corresponding responsible doctors, 39.7% by their family members, and 56.3% by themselves. Univariate analyses showed that disclosure of confirmed ESCC diagnosis to patients was correlated with gender, family history of cancer(FHC), education level, vocation, hospital administrative level, and attitudes of family members(P < 0.05). Furthermore,multivariate analysis indicated that attitude of family members was the most important and an independent factor for diagnosis disclosure. Those patients with a negative FHC, under-education, manual occupation, advanced stages, and hospitalized in municipal hospitals exhibited a low rate of truth telling.Conclusions: Truth telling for ESCC patients in Henan is not prevalent and may be improved through consultation with family members, particularly for patients with a negative FHC, poor education, manual occupation, and advanced stages.展开更多
Spectrum auction is an important approach of spectrum distribution in cognitive radio networks. However, a single secondary user(SU) probably can't afford the price of spectrum. Multiple SUs grouping together to p...Spectrum auction is an important approach of spectrum distribution in cognitive radio networks. However, a single secondary user(SU) probably can't afford the price of spectrum. Multiple SUs grouping together to participate in the auction as a whole is helpful to increase purchasing power. However, SUs could suffer from a new group cheating problem, i.e., parts of users conspire to manipulate the auction by submitting untruthful bids. Existing auction mechanisms were mainly designed to be strategy-proof only for individual user and can't deal with group cheating. In this paper, a novel spectrum auction mechanism called COSTAG(COst Sharing based Truthful Auction with Group-buying) is proposed to address the group cheating problem. COSTAG consists of a grouping rule to perform grouping and a payment rule to determine the market-clearing price in the spectrum auction. Different from single-echelon pricing approach employed in existing works, a multi-echelon pricing strategy is designed to increase the transaction rate and optimize social profit for the auction. Comprehensive theoretical analysis shows that COSTAG can satisfy the crucial economic robustness properties, both individual and group truthfulness. Simulations demonstrate that comparing with existing works, COSTAG can improve the system performance significantly.展开更多
Based on the theory of the quasi-truth degrees in two-valued predicate logic, some researches on approximate reasoning are studied in this paper. The relation of the pseudo-metric between first-order formulae and the ...Based on the theory of the quasi-truth degrees in two-valued predicate logic, some researches on approximate reasoning are studied in this paper. The relation of the pseudo-metric between first-order formulae and the quasi-truth degrees of first-order formulae is discussed, and it is proved that there is no isolated point in the logic metric space (F, ρ ). Thus the pseudo-metric between first-order formulae is well defined to develop the study about approximate reasoning in the logic metric space (F, ρ ). Then, three different types of approximate reasoning patterns are proposed, and their equivalence under some condition is proved. This work aims at filling in the blanks of approximate reasoning in quantitative predicate logic.展开更多
Analyzing the aftershock sequence of the 2008 Wenchuan earthquake,we considered 26 micro-earthquakes "just underneath" seismic stations.Making use of such special station-event configurations to determine th...Analyzing the aftershock sequence of the 2008 Wenchuan earthquake,we considered 26 micro-earthquakes "just underneath" seismic stations.Making use of such special station-event configurations to determine the depth of these micro-earthquakes provided accurate relocation of aftershocks with a reference set of "ground truth(GT)events".展开更多
文摘This article is a part of a larger study called The Abstract Truth of Media focused on the topic of the fictional media content opinions presented and perceived as truth.It will explore the abstract nature of truth in online media and its different forms.These media truths are types of fictional stories with certain effects on the public rather than a truthful presentation of the facts.Thus,the end goal of mass media today is not to tell the truth,but to create moral communities based on common experience and beliefs.Articles,opinions,and news in media are seen as a narrative strategy that can be understood only through storytelling analysis.Here the focus is on the understanding of Truth and Untruth in online media as well as the connection of Internet media technology with the increase of disinformation online.The new media model creates hostile groups instead of generating consent for the nation-state,the new online media model within through,Pseudo-communication,manipulation,delusion,lies,propaganda,and deliberate causing of moral anger.“The end of the truth”means that the truth on the Internet is lost among the vast amount of information and the lack of regulation regarding the correctness of the published data.Instead of truth,media researchers formally talk about post-truth,fake news,and“alternative facts”.Truth on the Internet is more like“Truthiness”or a belief that a statement is true based on the intuition or understanding of individuals,regardless of evidence,logic or facts.The subject of research is the connection between every new technology in mass media and the truth of the information and the effects on the consensus in society.Since the beginning of the 21st century,misinformation on the Internet has increased with the development of online media and social networks,and it is a problem of social peace and consent in every country.
基金partially supported by Research Programs of Henan Science and Technology Department(252102210022,232102210054)Henan Province Key Research and Development Project(231111212000)+2 种基金Henan Center for Out-standingOverseas Scientists(GZS2022011)Henan Province Collaborative Innovation Center of Aeronautics and Astronautics Electronic Information TechnologyHenan International Joint Laboratory of Aerospace Intelligent Technology and Systems.
文摘Rumor Control(RC),aimed at minimizing the spread of rumors in social networks,is of paramount importance,as the spread of rumors can lead to significant economic losses,societal disruptions,and even widespread panic.The RC problem has garnered extensive research attention,however,most existing solutions for rumor control face a trade-off between efficiency and effectiveness,which limits their practical application in real-world scenarios.In this light,this paper studies the Truth-spreading-based Rumor Control(TRC)problem,and introduces the Subgraphbased Greedy algorithm Optimized with CELF(SGOC),which employs subgraph techniques and the CELF strategy,as the basic solution for the TRC problem.To improve the performance of SGOC,we carefully design a shortest path length dictionary SPR and an Immune Nodes Set(INS),leading to the Shortest Path-Based Rumor Control(SPRC)algorithm.To further enhance the SPRC algorithm,we develop a pruning method that accelerates the construction process of INS,proposing the Improved Shortest Path-Based Rumor Control(ISPRC)algorithm,which demonstrates superior efficiency compared to both SPRC and SGOC.Extensive experiments conducted on five real-world datasets,demonstrate the effectiveness and efficiency of the proposed algorithms.
基金supported by the National Natural Science Foundation of China under Grant No.62072475.
文摘Unmanned and aerial systems as interactors among different system components for communications,have opened up great opportunities for truth data discovery in Mobile Crowd Sensing(MCS)which has not been properly solved in the literature.In this paper,an Unmanned Aerial Vehicles-supported Intelligent Truth Discovery(UAV-ITD)scheme is proposed to obtain truth data at low-cost communications for MCS.The main innovations of the UAV-ITD scheme are as follows:(1)UAV-ITD scheme takes the first step in employing UAV joint Deep Matrix Factorization(DMF)to discover truth data based on the trust mechanism for an Information Elicitation Without Verification(IEWV)problem in MCS.(2)This paper introduces a truth data discovery scheme for the first time that only needs to collect a part of n data samples to infer the data of the entire network with high accuracy,which saves more communication costs than most previous data collection schemes,where they collect n or kn data samples.Finally,we conducted extensive experiments to evaluate the UAV-ITD scheme.The results show that compared with previous schemes,our scheme can reduce estimated truth error by 52.25%–96.09%,increase the accuracy of workers’trust evaluation by 0.68–61.82 times,and save recruitment costs by 24.08%–54.15%in truth data discovery.
基金Fujian Province Young and Middle-Aged Teacher Education Research Project(Social Science Category)General Project,Project Name:Research on Social Media Use and Values Education for College Students in the Post-Truth Era in 2021(No.JAS21213).
文摘With the rapid development of the Internet and the widespread popularity of We Media in the 21st century,news communication has entered the post truth era.In the post truth era,truth and logic are often marginalized in the process of information dissemination,while emotional agitation becomes an important force that dominates public opinion.College students,as the most active and influential online audience in contemporary social media usage,have a profound impact on guiding and promoting the information environment of the entire society through their online behavior and ideological shaping.This article aims to explore the role and identity transformation of college students’online audiences on social media in the context of the post truth era,as well as the value characteristics behind it.It also explores how to correctly guide college students to participate in the voice of social news,promote their physical and mental health development,and cultivate correct values.
基金Fundamental Research Funds for the Central Universities,China (No. 22D111207)。
文摘With the rocketing progress of the Internet, it is easier for people to get information about the objects that they are interested in. However, this information usually has conflicts. In order to resolve conflicts and get the true information, truth discovery has been proposed and received widespread attention. Many algorithms have been proposed to adapt to different scenarios. This paper aims to investigate these algorithms and summarize them from the perspective of algorithm models and specific concepts. Some classic datasets and evaluation metrics are given in this paper. Some future directions for readers are also provided to better understand the field of truth discovery.
文摘The ideal goal to cultivate creative talents who "seek truth","strive for kindness" and "adore aesthetics " and are equipped with "perfect personality" should be achieved,which is expected to reach brand-new circumstances of "humans development and construction of completeness" and must and should explore "Truth","Kindness" and "Aesthetics" in Chinese education.This article is meant to explore "truth" of Chinese(language,article,literature) in the intellectual education from cognitive science and to promote students to get into quality of exploration;they should explore "kindness" in the moral education in Chinese(language,article,literature) from ethics,which is to urge wakefulness of students' moral consciousness;in addition,"aesthetics" in Chinese(language,article,literature) from aesthetic education is to spur students to construct free soul.
文摘The conception of truth-making,albeit in a rudimentary form,could already be discerned in the writings of G.E.Moore and E.Husserl in the early 1900s.A few years later it was more extensively exploited by William James.It was Wittgenstein,however,who gave the concept a precise meaning.In 1913/1914 Wittgenstein advanced a theory of possible worlds,only one of which was real.Every proposition suggests a part of a possible world which does or does not correspond to parts of the real world.In the first case the proposition is true,in the second case false.Moreover,the part of the real world makes the sentence true.This part is a truth-maker,and the sentence is a truth-bearer.Surprisingly enough,Wittgenstein’s concept of truth-making had its family resemblance with William James’s conception of truth.In 1915 Wittgenstein stopped using the concept of truth-making-it was also not mentioned in the Tractatus.Unfortunately,Russell did not notice this and in 1918 he adopted the concept of truth-making.In the 1930s,it was used by some second generation analytic philosophers(Schlick,Stebbing,and Wisdom).However,it became rather popular among analytic philosophers only in the 1980s.
文摘Man can choose the truth;he can surrender to it,testify to it through doubt and anguish,or he can remain indifferent or renegade.In post-truth times,hermeneutics,in its tragic sense,is constituted as an antidote that surpasses the abyss of nothingness and absurdity,in pharmakon to recover and regain,through the exercise of freedom and a renewed encounter with Christianity,the meaning of things.Fake news,information bubbles,and the tyranny of digital companies dilute the truth into information.Philosophy has been alive with the effective presence of truth,of that truth that,as Vico said,is great and conquers everything.If the original character of truth has been lost,it is worth asking since when and why,and what historical and intellectual processes have led to the notion of post-truth.When,in human history,a notion of such importance as the truth leaves an empty place,it does not take long for that emptiness to be filled.Philosophy deals with the truth;it is the first object that man seeks and the ultimate meaning of asking every question.Probing the sources of post-truth in Nietzsche,Heidegger,and Pareyson will shed light on the possibility of saving truth.To have the truth in the post-truth era is to have a flash of light that affects the conception of politics,science,anthropology,psychology,metaphysics,aesthetics,and the sociology.
基金supported by Chinese Acadmy of Sciences Fund(No.KCZX-YW-116-1)Joint Seismological Science Fundation of China (Nos.20080878 and 200708035)
文摘Because ambient seismic noise provides estimated Green’s function （EGF） between two sites with high accuracy, Rayleigh wave propagation along the path connecting the two sites is well resolved. Therefore, earthquakes which are close to one seismic station can be well located with calibration extracting from EGF. We test two algorithms in locating the 1998 Zhangbei earthquake, one algorithm is waveform-based, and the other is traveltime-based. We first compute EGF between station ZHB （a station about 40 km away from the epicenter） and five IC/IRIS stations. With the waveform-based approach, we calculate 1D synthetic single-force Green’s functions between ZHB and other four stations, and obtain traveltime corrections by correlating synthetic Green’s functions with EGFs in period band of 10–30 s. Then we locate the earthquake by minimizing the differential travel times between observed earthquake waveform and the 1D synthetic earthquake waveforms computed with focal mechanism provided by Global CMT after traveltime correction from EGFs. This waveform-based approach yields a location which error is about 13 km away from the location observed with InSAR. With the traveltime-based approach, we begin with measuring group velocity from EGFs as well as group arrival time on observed earthquake waveforms, and then locate the earthquake by minimizing the difference between observed group arrival time and arrival time measured on EGFs. This traveltime-based approach yields accuracy of 3 km, Therefore it is feasible to achieve GT5 （ground truth location with accuracy 5 km） with ambient seismic noises. The less accuracy of the waveform-based approach was mainly caused by uncertainty of focal mechanism.
文摘Endgame,the most difficult and elusive play by Samuel Beckett,sketches the post-war social spirit and norm.Absurd as the plot is,this paper is aimed at disclosing the truth of the world,of life,and of human nature covered in the setting of stage,the cyclical actions and the philosophic conversation.
文摘Air pollution has become a global concern for many years.Vehicular crowdsensing systems make it possible to monitor air quality at a fine granularity.To better utilize the sensory data with varying credibility,truth discovery frameworks are introduced.However,in urban cities,there is a significant difference in traffic volumes of streets or blocks,which leads to a data sparsity problem for truth discovery.Protecting the privacy of participant vehicles is also a crucial task.We first present a data masking-based privacy-preserving truth discovery framework,which incorporates spatial and temporal correlations to solve the sparsity problem.To further improve the truth discovery performance of the presented framework,an enhanced version is proposed with anonymous communication and data perturbation.Both frameworks are more lightweight than the existing cryptography-based methods.We also evaluate the work with simulations and fully discuss the performance and possible extensions.
基金supported by grants from the National Natural Science Foundation of China(Grant No.81472323)Top Talent Support Project of Zhengzhou University(Grant No.ZDGD13001)Innovation Scientists and Technicians Troop Construction Projects of Henan Province,China(Grant No.3047)
文摘Objective: This study aims to investigate the truth-telling status and the relevant factors of esophageal squamous cell carcinoma(ESCC) patients in Henan, China.Methods: A cross-sectional study from April to June 2015 using questionnaires was given to 301 family members of hospitalized ESCC patients based in three affiliated hospitals of Zhengzhou University(i.e., The First Hospital, The Second Hospital, and Tumor Hospital) and Anyang Tumor Hospital.Results: Among the 41.9%(126/301) hospitalized ESCC patients who knew of their true diagnoses, only 4.0% patients were informed by their corresponding responsible doctors, 39.7% by their family members, and 56.3% by themselves. Univariate analyses showed that disclosure of confirmed ESCC diagnosis to patients was correlated with gender, family history of cancer(FHC), education level, vocation, hospital administrative level, and attitudes of family members(P < 0.05). Furthermore,multivariate analysis indicated that attitude of family members was the most important and an independent factor for diagnosis disclosure. Those patients with a negative FHC, under-education, manual occupation, advanced stages, and hospitalized in municipal hospitals exhibited a low rate of truth telling.Conclusions: Truth telling for ESCC patients in Henan is not prevalent and may be improved through consultation with family members, particularly for patients with a negative FHC, poor education, manual occupation, and advanced stages.
基金partially supported by the National Science Foundation of China (No. 61070211, No. 61003304, No 61501482 and No 61070201)Equipment research foundation (No.6140134040216)the Ph.D. Programs Foundation of Ministry of Education of China (No. 20114307120003)
文摘Spectrum auction is an important approach of spectrum distribution in cognitive radio networks. However, a single secondary user(SU) probably can't afford the price of spectrum. Multiple SUs grouping together to participate in the auction as a whole is helpful to increase purchasing power. However, SUs could suffer from a new group cheating problem, i.e., parts of users conspire to manipulate the auction by submitting untruthful bids. Existing auction mechanisms were mainly designed to be strategy-proof only for individual user and can't deal with group cheating. In this paper, a novel spectrum auction mechanism called COSTAG(COst Sharing based Truthful Auction with Group-buying) is proposed to address the group cheating problem. COSTAG consists of a grouping rule to perform grouping and a payment rule to determine the market-clearing price in the spectrum auction. Different from single-echelon pricing approach employed in existing works, a multi-echelon pricing strategy is designed to increase the transaction rate and optimize social profit for the auction. Comprehensive theoretical analysis shows that COSTAG can satisfy the crucial economic robustness properties, both individual and group truthfulness. Simulations demonstrate that comparing with existing works, COSTAG can improve the system performance significantly.
基金National Natural Science Foundation of China (No. 60875034)Spanish Ministry of Education and Science Fund,Spain (No.TIN-2009-0828)Spanish Regional Government (Junta de Andalucia) Fund,Spain (No. P08-TIC-3548)
文摘Based on the theory of the quasi-truth degrees in two-valued predicate logic, some researches on approximate reasoning are studied in this paper. The relation of the pseudo-metric between first-order formulae and the quasi-truth degrees of first-order formulae is discussed, and it is proved that there is no isolated point in the logic metric space (F, ρ ). Thus the pseudo-metric between first-order formulae is well defined to develop the study about approximate reasoning in the logic metric space (F, ρ ). Then, three different types of approximate reasoning patterns are proposed, and their equivalence under some condition is proved. This work aims at filling in the blanks of approximate reasoning in quantitative predicate logic.
文摘Analyzing the aftershock sequence of the 2008 Wenchuan earthquake,we considered 26 micro-earthquakes "just underneath" seismic stations.Making use of such special station-event configurations to determine the depth of these micro-earthquakes provided accurate relocation of aftershocks with a reference set of "ground truth(GT)events".
