Anthropogenic climate change is altering species distributions globally.While species distributions are expected to shift to higher latitudes and elevations under global warming,empirical evidence on distribution shif...Anthropogenic climate change is altering species distributions globally.While species distributions are expected to shift to higher latitudes and elevations under global warming,empirical evidence on distribution shifts is mixed,and factors mediating the direction and magnitude of range shifts remain unclear.Using a dataset of 132new provincial records for 96 resident bird species from 2000 to 2023,we measured geographic distance,latitudinal shift,and temperature shift from each new record to the historical range for each species to test for poleward shifts.We assessed taxonomic variation in the magnitude of range shifts and used phylogenetic generalized linear mixed models to quantify relationships between species traits and the extent of range shifts.Our results revealed that new records occurred at a mean geographic distance of 420 km from historical ranges,with mean latitudinal shifts of+1.68°(poleward)and temperature shifts of-1.33℃(toward colder climates).The magnitude of geographic range shifts was strongly constrained by phylogenetic relatedness.Habitat breadth,habitat openness,and centroid latitude of historical ranges emerged as significant predictors of range shifts.Our results suggest that resident bird species'geographic ranges in China are shifting poleward,but the magnitude of these shifts is non-random across lineages.Species with broader habitat preferences and those from warmer climates are more likely to shift farther from their historical ranges and toward higher latitudes.This study emphasizes taxonomic variation in species range shifts and highlights the need for species-and site-specific conservation strategies under global warming.展开更多
Objectives:Electronic health records(EHRs)offer valuable real-world data(RWD)for Chinese medicine research.However,significant methodological challenges remain in developing integrative Chinese-Western medicine(ICWM)d...Objectives:Electronic health records(EHRs)offer valuable real-world data(RWD)for Chinese medicine research.However,significant methodological challenges remain in developing integrative Chinese-Western medicine(ICWM)databases.This study aims to establish a best-practice methodological framework,referred to as BRIDGE,to guide the construction of ICWM databases using EHRs.Methods:We developed the methodological framework through a comprehensive process,including systematic literature review,synthesis of empirical experiences,thematic expert discussions,and consultation with an external panel to reach consensus.Results:The BRIDGE framework outlines 6 core components for ICWM-EHR database development:Overall design,database architecture,data extraction and linkage,data governance,data verification,and data quality evaluation.Key data elements include variables related to study population,treatment or exposure,outcomes,and confounders.These databases support various research applications,particularly in evaluating the effectiveness and safety of integrative therapies.To demonstrate its practical value,we developed an ICWM-EHR database on women’s reproductive lifespan,encompassing 2,064,482 patients.This database captures women’s health conditions across the life course,from reproductive age to older adulthood.Conclusions:The BRIDGE methodological framework provides a standardized approach to building high-quality ICWM-EHR databases.It offers a unique opportunity to strengthen the methodological rigor and real-world relevance of Chinese medicine research in integrated healthcare settings.展开更多
The usefulness of telemedicine has been acknowledged because of coronavirus disease 2019,which highlighted it as a prominent and expedient method of delivering healthcare support while ensuring safety.1The implementat...The usefulness of telemedicine has been acknowledged because of coronavirus disease 2019,which highlighted it as a prominent and expedient method of delivering healthcare support while ensuring safety.1The implementation of telemedicine can be traced to nearly every corner of the globe,from advanced economies like the USA and Europe to the most remote African villages.Today,telemedicine is widely used in developed nations.展开更多
Three new records from Vietnam,Phlegmariurus guangdongensis Ching,Adiantum longzhouensis A.H.Wang,F.G.Wang&F.W.Xing,and Lepisorus bicolor Ching,are reported.The identification characteristics,information of specim...Three new records from Vietnam,Phlegmariurus guangdongensis Ching,Adiantum longzhouensis A.H.Wang,F.G.Wang&F.W.Xing,and Lepisorus bicolor Ching,are reported.The identification characteristics,information of specimen,and geographical distribution of the species are described.The discovery of new records not only enriches the study of plant diversity in Vietnam,but also provides important information for biodiversity conservation and botanical research in the region.The voucher specimens are kept in the Herbarium of Kunming Institute of Botany,Chinese Academy of Sciences(KUN),Herbarium of Institute of Botany,Chinese Academy of Sciences(PE)and Herbarium of Guangxi Forestry Research Institute(GXFI).展开更多
Due to the complexity and variability of carbonate formation leakage zones, lost circulation prediction and control is one of the major challenges of carbonate drilling. It raises well-control risks and production exp...Due to the complexity and variability of carbonate formation leakage zones, lost circulation prediction and control is one of the major challenges of carbonate drilling. It raises well-control risks and production expenses. This research utilizes the H oilfield as an example, employs seismic features to analyze mud loss prediction, and produces a complete set of pre-drilling mud loss prediction solutions. Firstly, 16seismic attributes are calculated based on the post-stack seismic data, and the mud loss rate per unit footage is specified. The sample set is constructed by extracting each attribute from the seismic trace surrounding 15 typical wells, with a ratio of 8:2 between the training set and the test set. With the calibration results for mud loss rate per unit footage, the nonlinear mapping relationship between seismic attributes and mud loss rate per unit size is established using the mixed density network model.Then, the influence of the number of sub-Gausses and the uncertainty coefficient on the model's prediction is evaluated. Finally, the model is used in conjunction with downhole drilling conditions to assess the risk of mud loss in various layers and along the wellbore trajectory. The study demonstrates that the mean relative errors of the model for training data and test data are 6.9% and 7.5%, respectively, and that R2is 90% and 88%, respectively, for training data and test data. The accuracy and efficacy of mud loss prediction may be greatly enhanced by combining 16 seismic attributes with the mud loss rate per unit footage and applying machine learning methods. The mud loss prediction model based on the MDN model can not only predict the mud loss rate but also objectively evaluate the prediction based on the quality of the data and the model.展开更多
Three new species of jumping spiders from the Xizang region,China are described:Evarcha darthvaderi Yu&Zhang,sp.nov.(♂♀),Orcevia qogyigyacani Yu&Zhang,sp.nov.(♀),Synagelides yadong Ni,Yu&Zhang,sp.nov.(...Three new species of jumping spiders from the Xizang region,China are described:Evarcha darthvaderi Yu&Zhang,sp.nov.(♂♀),Orcevia qogyigyacani Yu&Zhang,sp.nov.(♀),Synagelides yadong Ni,Yu&Zhang,sp.nov.(♀).Two species are newly recorded in China:Phlegra prasanna Caleb&Mathai,2015 and Ptocasius urbanii(Żabka,1981),and the female of P.prasanna is described for the first time.展开更多
The key point in studying or teaching the history of Chinese medicine is on the doctrines underlying it and on its perception of the body,physiology,pathology,and its treatment.Namely,there is often a tendency to focu...The key point in studying or teaching the history of Chinese medicine is on the doctrines underlying it and on its perception of the body,physiology,pathology,and its treatment.Namely,there is often a tendency to focus on reading and analysing the classical canons and therapy-related texts including formularies and materia medica collections.However,focusing on these sources provides us with a one-sided presentation of Chinese medicine.These primary sources lack the clinical down-to-earth know-how that encompasses medical treatment,which are represented,for instance,in the clinical rounds of modern medical schools.Our traditional focus on the medical canons and formularies provides almost no clinical knowledge,leaving us with a one-sided narrative that ignores how medicine and healing are actually practiced in the field.This paper focuses on the latter aspect of medicine from a historical perspective.Using written and visual sources dating to the Song dynasty,clinical encounters between doctors and patients including their families are depicted based on case records recorded by a physician,members of the patient’s family,and bystanders.This array of case records or case stories will enable us to narrate the interaction between physicians and patients both from the clinical perspective and from the social interaction.This paper will also discuss visual depictions of the medical encounter to provide another perspective for narrating medicine during the Song dynasty.Medical case records and paintings depicting medical encounters are exemplary of the potential of Chinese primary sources for narrative medicine.展开更多
Chemical weathering can occur on Earth and other rocky planets with liquid water on their surfaces.As the Curiosity Mission has revealed that fluvio-lacustrine depositional environments once prevailed in Gale Crater,i...Chemical weathering can occur on Earth and other rocky planets with liquid water on their surfaces.As the Curiosity Mission has revealed that fluvio-lacustrine depositional environments once prevailed in Gale Crater,investigation of sediment geochemistry to interpret chemical weathering history and the possible influence of climate fluctuation seems feasible on Mars.This study examines the relationship between temperature and the degree of weathering inferred from weathering indices,and applies the suitable weathering indices to a compilation of published datasets from Gale Crater sediment.The selected weathering indices(CIA,CIW,PIA,V,W,and WIP)consistently suggest an increase followed by a more gradual increase and decrease in weathering intensity up-section,which might reflect climate variations.However,diagenetic and/or hydrothermal alteration seem to have overprinted the primary weathering signature.展开更多
In this paper,large deviations principle(LDP)and moderate deviations principle(MDP)of record numbers in random walks are studied under certain conditions.The results show that the rate functions of LDP and MDP are dif...In this paper,large deviations principle(LDP)and moderate deviations principle(MDP)of record numbers in random walks are studied under certain conditions.The results show that the rate functions of LDP and MDP are different from those of weak record numbers,which are interesting complements of the conclusions by Li and Yao[1].展开更多
The most reliable archive of atmospheric CO_(2) information comprises ice core records spanning the last 800 ka(thousand years ago).The connection between temperature and greenhouse gases,as deduced from ice core reco...The most reliable archive of atmospheric CO_(2) information comprises ice core records spanning the last 800 ka(thousand years ago).The connection between temperature and greenhouse gases,as deduced from ice core records,may help better simulate CO_(2) variations.This research aimed to explore the model methods to precisely predict the atmospheric CO_(2) concentrations and fill the CO_(2) data gaps with CH4 concentration and temperature proxies(δD andδ18O)from Antarctica ice cores,employing Artificial Neural Network(ANN)and Wavelet Transform(WT)techniques.This study was divided into three sections to examine various timescales and resolutions.First,coarse-resolution CO_(2) records from the Vostok and EPICA Dronning Maud Land cores from 70–120 ka were used.Second,the models were applied to the Dome Fuji core for 9–120 ka.Finally,a high-resolution West Antarctic Ice Sheet(WAIS)Divide ice core record,focusing on the 9–70 ka,was employed.The results showed that between 70–120 ka,the hybrid method surpasses the traditional ANN approach.The hybrid method maintained superior performance in the last phase by utilizing high-resolution WAIS record.The results indicated improved accuracy(r=0.98),reinforcing the notion that hybrid methods yield better outcomes than those relying solely on AI methods.展开更多
Personal video recorders (PVRs) have altered the way users consume television (TV) content by allowing users to record programs and watch them at their convenience, overcoming the constraints of live broadcasting. How...Personal video recorders (PVRs) have altered the way users consume television (TV) content by allowing users to record programs and watch them at their convenience, overcoming the constraints of live broadcasting. However, standalone PVRs are limited by their individual storage capacities, restricting the number of programs they can store. While online catch-up TV services such as Hulu and Netflix mitigate this limitation by offering on-demand access to broadcast programs shortly after their initial broadcast, they require substantial storage and network resources, leading to significant infrastructural costs for service providers. To address these challenges, we propose a collaborative TV content recording system that leverages distributed PVRs, combining their storage into a virtual shared pool without additional costs. Our system aims to support all concurrent playback requests without service interruption while ensuring program availability comparable to that of local devices. The main contributions of our proposed system are fourfold. First, by sharing storage and upload bandwidth among PVRs, our system significantly expands the overall recording capacity and enables simultaneous recording of multiple programs without the physical constraints of standalone devices. Second, by utilizing erasure coding efficiently, our system reduces the storage space required for each program, allowing more programs to be recorded compared to traditional replication. Third, we propose an adaptive redundancy scheme to control the degree of redundancy of each program based on its evolving playback demand, ensuring high-quality playback by providing sufficient bandwidth for popular programs. Finally, we introduce a contribution-based incentive policy that encourages PVRs to actively participate by contributing resources, while discouraging excessive consumption of the combined storage pool. Through extensive experiments, we demonstrate the effectiveness of our proposed collaborative TV program recording system in terms of storage efficiency and performance.展开更多
This study provides detailed descriptions and illustrations of a new species,Psilota nigritarsa Huo&Zhao,sp.nov.,and a newly recorded species in China,P.nigripilosa Shiraki,1968.It also offers additional measureme...This study provides detailed descriptions and illustrations of a new species,Psilota nigritarsa Huo&Zhao,sp.nov.,and a newly recorded species in China,P.nigripilosa Shiraki,1968.It also offers additional measurements for Psilota bashanensis Huo,Zhao&Liu,2022.The paper proposes a reclassification of the P.innupta-group in the Palaearctic Region into two subgroups based on the morphology of the male genitalia.An updated taxonomic key for the species of the P.innupta-group within the Palaearctic Region is also provided.展开更多
Four cynipid gall wasps belonging to three genera are reported with descriptions of their host plants and galls,i.e.,Belizinella vicina Kovalev,1965,Cerroneuroterus folimargo(Monzen,1954),C.monseni(Dettmer,1934)and Ne...Four cynipid gall wasps belonging to three genera are reported with descriptions of their host plants and galls,i.e.,Belizinella vicina Kovalev,1965,Cerroneuroterus folimargo(Monzen,1954),C.monseni(Dettmer,1934)and Neuroterus hakonensis Ashmead,1904.The genus Belizinella and three species,B.vicina,C.monseni and N.hakonensis,are recorded in China for the first time.The species B.vicina is redescribed for the missing or incongruent features from its original description.In addition,the gall host for Ufo rufiventris Wang,Guo,Wang,Pujade-Villar&Chen is also recorded here for the first time.展开更多
A new species Guizygiella haoyangi Yao&Liu,sp.nov.(♂)is reported from Fujian Province,China,and a new record of G.salta(Yin&Gong,1996)in Jiangxi Province.Detailed morphological descriptions,photographs of the...A new species Guizygiella haoyangi Yao&Liu,sp.nov.(♂)is reported from Fujian Province,China,and a new record of G.salta(Yin&Gong,1996)in Jiangxi Province.Detailed morphological descriptions,photographs of the body and genitalia of these two species are provided.展开更多
This paper presents the design of a low-power multi-channel analog front-end(AFE) for bio-potential recording. By using time division multiplexing(TDM), a successive approximation register analog-to-digital converter(...This paper presents the design of a low-power multi-channel analog front-end(AFE) for bio-potential recording. By using time division multiplexing(TDM), a successive approximation register analog-to-digital converter(SAR ADC) is shared among all 20 channels. A charge-sharing multiplexer(MUX) is proposed to transmit the output signals from the respective channels to the ADC. By separately pre sampling the output of each channel, the sampling time of each channel is greatly extended and additional active buffers are avoided. The AFE is fabricated in a 65-nm CMOS process, and the whole system consumes 28.2 μW under 1 V supply. Each analog acquisition channel consumes 1.25 μW and occupies a chip area of 0.14 mm2. Measurement results show that the AFE achieves an input referred noise of 1.8 μV·rms in a 350 Hz bandwidth and a noise efficiency factor(NEF) of 4.1. The 12-bit SAR ADC achieves an ENOB of 9.8 bit operating at 25 k S/s. The AFE is experimented on real-world applications by measuring human ECG and a clear ECG waveform is captured.展开更多
A 34⁃year⁃old Australian woman broke the Guinness World Record for the most pull⁃ups performed by a woman in 24 hours by doing 7,079 pull⁃ups.To say Olivia Vinson put the old record for most pull⁃ups by a woman in 24 ...A 34⁃year⁃old Australian woman broke the Guinness World Record for the most pull⁃ups performed by a woman in 24 hours by doing 7,079 pull⁃ups.To say Olivia Vinson put the old record for most pull⁃ups by a woman in 24 hours to shame would be an understatement,considering that the Australian fitness enthusiast nearly doubled it.The achieve⁃ment began as a wild proposition from her husband and coach,and even though initially she just laughed at the idea of challenging a world record,it eventually started to make sense.Olivia trained for three months before taking on the challenge in September of last year,but 12 hours into her attempt,she pulled a bicep tendon(肱二头肌腱),which made her unable to perform pull⁃ups anymore.She had to cancel the whole thing,but after healing for a few months,she was back to breaking the Guinness World Record.展开更多
A new Megaselia species： Megaselia angustirostris Fang ＆ Liu, sp. nov., is described and illustrated and two species of the genus, M. nigra （Meigen） and M. albicaudata （Wood）, are reported for the first time fro...A new Megaselia species： Megaselia angustirostris Fang ＆ Liu, sp. nov., is described and illustrated and two species of the genus, M. nigra （Meigen） and M. albicaudata （Wood）, are reported for the first time from China. The type specimens are deposited in College of Biological and Environmental Engineering, Shenyang University.展开更多
基金supported by grants from the National Natural Science Foundation of China(Grant No.32271733)Guangdong Basic and Applied Basic Research Foundation(Grant No.2023A1515011045)+1 种基金Science and Technology Projects in Guangzhou(Grant No.2023A04J0121)SCNU Training Program of Innovation for Undergraduates,China。
文摘Anthropogenic climate change is altering species distributions globally.While species distributions are expected to shift to higher latitudes and elevations under global warming,empirical evidence on distribution shifts is mixed,and factors mediating the direction and magnitude of range shifts remain unclear.Using a dataset of 132new provincial records for 96 resident bird species from 2000 to 2023,we measured geographic distance,latitudinal shift,and temperature shift from each new record to the historical range for each species to test for poleward shifts.We assessed taxonomic variation in the magnitude of range shifts and used phylogenetic generalized linear mixed models to quantify relationships between species traits and the extent of range shifts.Our results revealed that new records occurred at a mean geographic distance of 420 km from historical ranges,with mean latitudinal shifts of+1.68°(poleward)and temperature shifts of-1.33℃(toward colder climates).The magnitude of geographic range shifts was strongly constrained by phylogenetic relatedness.Habitat breadth,habitat openness,and centroid latitude of historical ranges emerged as significant predictors of range shifts.Our results suggest that resident bird species'geographic ranges in China are shifting poleward,but the magnitude of these shifts is non-random across lineages.Species with broader habitat preferences and those from warmer climates are more likely to shift farther from their historical ranges and toward higher latitudes.This study emphasizes taxonomic variation in species range shifts and highlights the need for species-and site-specific conservation strategies under global warming.
基金supported by the National Key Research&Development Program of China(No.2024YFC3505800)the National Natural Science Foundation of China(Nos.82474334,82474335 and 72174132)+3 种基金National Science Fund for Distinguished Young Scholars(No.82225049)the Key Research&Development Projects of Sichuan Provincial Department of Science and Technology(Nos.2024YFFK0174 and 2024YFFK0152)1.3.5 Project for Disciplines of Excellence,West China Hospital,Sichuan University(Nos.ZYYC24010 and ZYGD23004)the Special Fund for Traditional Chinese Medicine of Sichuan Provincial Administration of Traditional Chinese Medicine(No.2024zd023).
文摘Objectives:Electronic health records(EHRs)offer valuable real-world data(RWD)for Chinese medicine research.However,significant methodological challenges remain in developing integrative Chinese-Western medicine(ICWM)databases.This study aims to establish a best-practice methodological framework,referred to as BRIDGE,to guide the construction of ICWM databases using EHRs.Methods:We developed the methodological framework through a comprehensive process,including systematic literature review,synthesis of empirical experiences,thematic expert discussions,and consultation with an external panel to reach consensus.Results:The BRIDGE framework outlines 6 core components for ICWM-EHR database development:Overall design,database architecture,data extraction and linkage,data governance,data verification,and data quality evaluation.Key data elements include variables related to study population,treatment or exposure,outcomes,and confounders.These databases support various research applications,particularly in evaluating the effectiveness and safety of integrative therapies.To demonstrate its practical value,we developed an ICWM-EHR database on women’s reproductive lifespan,encompassing 2,064,482 patients.This database captures women’s health conditions across the life course,from reproductive age to older adulthood.Conclusions:The BRIDGE methodological framework provides a standardized approach to building high-quality ICWM-EHR databases.It offers a unique opportunity to strengthen the methodological rigor and real-world relevance of Chinese medicine research in integrated healthcare settings.
文摘The usefulness of telemedicine has been acknowledged because of coronavirus disease 2019,which highlighted it as a prominent and expedient method of delivering healthcare support while ensuring safety.1The implementation of telemedicine can be traced to nearly every corner of the globe,from advanced economies like the USA and Europe to the most remote African villages.Today,telemedicine is widely used in developed nations.
文摘Three new records from Vietnam,Phlegmariurus guangdongensis Ching,Adiantum longzhouensis A.H.Wang,F.G.Wang&F.W.Xing,and Lepisorus bicolor Ching,are reported.The identification characteristics,information of specimen,and geographical distribution of the species are described.The discovery of new records not only enriches the study of plant diversity in Vietnam,but also provides important information for biodiversity conservation and botanical research in the region.The voucher specimens are kept in the Herbarium of Kunming Institute of Botany,Chinese Academy of Sciences(KUN),Herbarium of Institute of Botany,Chinese Academy of Sciences(PE)and Herbarium of Guangxi Forestry Research Institute(GXFI).
基金the financially supported by the National Natural Science Foundation of China(Grant No.52104013)the China Postdoctoral Science Foundation(Grant No.2022T150724)。
文摘Due to the complexity and variability of carbonate formation leakage zones, lost circulation prediction and control is one of the major challenges of carbonate drilling. It raises well-control risks and production expenses. This research utilizes the H oilfield as an example, employs seismic features to analyze mud loss prediction, and produces a complete set of pre-drilling mud loss prediction solutions. Firstly, 16seismic attributes are calculated based on the post-stack seismic data, and the mud loss rate per unit footage is specified. The sample set is constructed by extracting each attribute from the seismic trace surrounding 15 typical wells, with a ratio of 8:2 between the training set and the test set. With the calibration results for mud loss rate per unit footage, the nonlinear mapping relationship between seismic attributes and mud loss rate per unit size is established using the mixed density network model.Then, the influence of the number of sub-Gausses and the uncertainty coefficient on the model's prediction is evaluated. Finally, the model is used in conjunction with downhole drilling conditions to assess the risk of mud loss in various layers and along the wellbore trajectory. The study demonstrates that the mean relative errors of the model for training data and test data are 6.9% and 7.5%, respectively, and that R2is 90% and 88%, respectively, for training data and test data. The accuracy and efficacy of mud loss prediction may be greatly enhanced by combining 16 seismic attributes with the mud loss rate per unit footage and applying machine learning methods. The mud loss prediction model based on the MDN model can not only predict the mud loss rate but also objectively evaluate the prediction based on the quality of the data and the model.
基金funded by Survey of Wildlife Resources in Key Areas of Tibet(ZL202203601).
文摘Three new species of jumping spiders from the Xizang region,China are described:Evarcha darthvaderi Yu&Zhang,sp.nov.(♂♀),Orcevia qogyigyacani Yu&Zhang,sp.nov.(♀),Synagelides yadong Ni,Yu&Zhang,sp.nov.(♀).Two species are newly recorded in China:Phlegra prasanna Caleb&Mathai,2015 and Ptocasius urbanii(Żabka,1981),and the female of P.prasanna is described for the first time.
基金This study is financed by the grants from Israel Science Foundation(No.ISF-1199/16)Chiang Ching-kuo Foundation for International Scholarly Exchange(No.RG001-U-19).
文摘The key point in studying or teaching the history of Chinese medicine is on the doctrines underlying it and on its perception of the body,physiology,pathology,and its treatment.Namely,there is often a tendency to focus on reading and analysing the classical canons and therapy-related texts including formularies and materia medica collections.However,focusing on these sources provides us with a one-sided presentation of Chinese medicine.These primary sources lack the clinical down-to-earth know-how that encompasses medical treatment,which are represented,for instance,in the clinical rounds of modern medical schools.Our traditional focus on the medical canons and formularies provides almost no clinical knowledge,leaving us with a one-sided narrative that ignores how medicine and healing are actually practiced in the field.This paper focuses on the latter aspect of medicine from a historical perspective.Using written and visual sources dating to the Song dynasty,clinical encounters between doctors and patients including their families are depicted based on case records recorded by a physician,members of the patient’s family,and bystanders.This array of case records or case stories will enable us to narrate the interaction between physicians and patients both from the clinical perspective and from the social interaction.This paper will also discuss visual depictions of the medical encounter to provide another perspective for narrating medicine during the Song dynasty.Medical case records and paintings depicting medical encounters are exemplary of the potential of Chinese primary sources for narrative medicine.
基金supported by the NRF grant funded by the Korean Government(MSIT,No.2022R1A2C1004798)Global-Learning&Academic research institution for Master’s·PhD students,and Postdocs(LAMP)Program of the National Research Foundation of Korea(NRF)grant funded by the Ministry of Education(No.RS-2023-00301702).
文摘Chemical weathering can occur on Earth and other rocky planets with liquid water on their surfaces.As the Curiosity Mission has revealed that fluvio-lacustrine depositional environments once prevailed in Gale Crater,investigation of sediment geochemistry to interpret chemical weathering history and the possible influence of climate fluctuation seems feasible on Mars.This study examines the relationship between temperature and the degree of weathering inferred from weathering indices,and applies the suitable weathering indices to a compilation of published datasets from Gale Crater sediment.The selected weathering indices(CIA,CIW,PIA,V,W,and WIP)consistently suggest an increase followed by a more gradual increase and decrease in weathering intensity up-section,which might reflect climate variations.However,diagenetic and/or hydrothermal alteration seem to have overprinted the primary weathering signature.
基金supported by the National Natural Science Foundation of China(Grant No.11671145)the Science and Technology Commission of Shanghai Municipality(Grant No.18dz2271000).
文摘In this paper,large deviations principle(LDP)and moderate deviations principle(MDP)of record numbers in random walks are studied under certain conditions.The results show that the rate functions of LDP and MDP are different from those of weak record numbers,which are interesting complements of the conclusions by Li and Yao[1].
基金supported by the Brain Pool Program through the National Research Foundation of Korea(NRF)and funded by the Ministry of Science and ICT[Grant numbers:2020H1D3A1A04081353,2020M1A5A1110607,2018R1A5A1024958,and RS-2023-00291696].
文摘The most reliable archive of atmospheric CO_(2) information comprises ice core records spanning the last 800 ka(thousand years ago).The connection between temperature and greenhouse gases,as deduced from ice core records,may help better simulate CO_(2) variations.This research aimed to explore the model methods to precisely predict the atmospheric CO_(2) concentrations and fill the CO_(2) data gaps with CH4 concentration and temperature proxies(δD andδ18O)from Antarctica ice cores,employing Artificial Neural Network(ANN)and Wavelet Transform(WT)techniques.This study was divided into three sections to examine various timescales and resolutions.First,coarse-resolution CO_(2) records from the Vostok and EPICA Dronning Maud Land cores from 70–120 ka were used.Second,the models were applied to the Dome Fuji core for 9–120 ka.Finally,a high-resolution West Antarctic Ice Sheet(WAIS)Divide ice core record,focusing on the 9–70 ka,was employed.The results showed that between 70–120 ka,the hybrid method surpasses the traditional ANN approach.The hybrid method maintained superior performance in the last phase by utilizing high-resolution WAIS record.The results indicated improved accuracy(r=0.98),reinforcing the notion that hybrid methods yield better outcomes than those relying solely on AI methods.
基金supported by the National Research Foundation of Korea(NRF)grant funded by the Korea government(MSIT)(Nos.2019R1A2C1002221 and RS-2023-00252186)Institute of Information&Communications Technology Planning&Evaluation(IITP)grant funded by the Korea government(MSIT)(Nos.2021-0-00590,RS-2021-II210590Decentralized High Performance Consensus for Large-Scale Blockchains).
文摘Personal video recorders (PVRs) have altered the way users consume television (TV) content by allowing users to record programs and watch them at their convenience, overcoming the constraints of live broadcasting. However, standalone PVRs are limited by their individual storage capacities, restricting the number of programs they can store. While online catch-up TV services such as Hulu and Netflix mitigate this limitation by offering on-demand access to broadcast programs shortly after their initial broadcast, they require substantial storage and network resources, leading to significant infrastructural costs for service providers. To address these challenges, we propose a collaborative TV content recording system that leverages distributed PVRs, combining their storage into a virtual shared pool without additional costs. Our system aims to support all concurrent playback requests without service interruption while ensuring program availability comparable to that of local devices. The main contributions of our proposed system are fourfold. First, by sharing storage and upload bandwidth among PVRs, our system significantly expands the overall recording capacity and enables simultaneous recording of multiple programs without the physical constraints of standalone devices. Second, by utilizing erasure coding efficiently, our system reduces the storage space required for each program, allowing more programs to be recorded compared to traditional replication. Third, we propose an adaptive redundancy scheme to control the degree of redundancy of each program based on its evolving playback demand, ensuring high-quality playback by providing sufficient bandwidth for popular programs. Finally, we introduce a contribution-based incentive policy that encourages PVRs to actively participate by contributing resources, while discouraging excessive consumption of the combined storage pool. Through extensive experiments, we demonstrate the effectiveness of our proposed collaborative TV program recording system in terms of storage efficiency and performance.
基金The research is supported by the National Natural Sciences Foundation of China(31900345)China Postdoctoral Science Foundation(2022M722020)+2 种基金the Key Project of Shaanxi Province Science and Technology Department(2024JCYBMS-152)the Key Project of Scientific Research Program of Shaanxi Provincial Education Department(23JY020)Key Projects of Shaanxi University of Technology(SLGKYXM2302,X20240134)。
文摘This study provides detailed descriptions and illustrations of a new species,Psilota nigritarsa Huo&Zhao,sp.nov.,and a newly recorded species in China,P.nigripilosa Shiraki,1968.It also offers additional measurements for Psilota bashanensis Huo,Zhao&Liu,2022.The paper proposes a reclassification of the P.innupta-group in the Palaearctic Region into two subgroups based on the morphology of the male genitalia.An updated taxonomic key for the species of the P.innupta-group within the Palaearctic Region is also provided.
基金supported by the National Natural Science Foundation of China(31472032,31071970)Zhejiang Provincial Natural Science Foundation for Distinguished Young Scholars(LR14C040002)。
文摘Four cynipid gall wasps belonging to three genera are reported with descriptions of their host plants and galls,i.e.,Belizinella vicina Kovalev,1965,Cerroneuroterus folimargo(Monzen,1954),C.monseni(Dettmer,1934)and Neuroterus hakonensis Ashmead,1904.The genus Belizinella and three species,B.vicina,C.monseni and N.hakonensis,are recorded in China for the first time.The species B.vicina is redescribed for the missing or incongruent features from its original description.In addition,the gall host for Ufo rufiventris Wang,Guo,Wang,Pujade-Villar&Chen is also recorded here for the first time.
基金supported by the Key Laboratoryy of Jiangxi Province for Biological Invasion and Biosecurity(2023SSY02111)。
文摘A new species Guizygiella haoyangi Yao&Liu,sp.nov.(♂)is reported from Fujian Province,China,and a new record of G.salta(Yin&Gong,1996)in Jiangxi Province.Detailed morphological descriptions,photographs of the body and genitalia of these two species are provided.
基金supported by the National Key R&D Program of China under Grant 2018YFA0701400 and 2018YFA0701401.
文摘This paper presents the design of a low-power multi-channel analog front-end(AFE) for bio-potential recording. By using time division multiplexing(TDM), a successive approximation register analog-to-digital converter(SAR ADC) is shared among all 20 channels. A charge-sharing multiplexer(MUX) is proposed to transmit the output signals from the respective channels to the ADC. By separately pre sampling the output of each channel, the sampling time of each channel is greatly extended and additional active buffers are avoided. The AFE is fabricated in a 65-nm CMOS process, and the whole system consumes 28.2 μW under 1 V supply. Each analog acquisition channel consumes 1.25 μW and occupies a chip area of 0.14 mm2. Measurement results show that the AFE achieves an input referred noise of 1.8 μV·rms in a 350 Hz bandwidth and a noise efficiency factor(NEF) of 4.1. The 12-bit SAR ADC achieves an ENOB of 9.8 bit operating at 25 k S/s. The AFE is experimented on real-world applications by measuring human ECG and a clear ECG waveform is captured.
文摘A 34⁃year⁃old Australian woman broke the Guinness World Record for the most pull⁃ups performed by a woman in 24 hours by doing 7,079 pull⁃ups.To say Olivia Vinson put the old record for most pull⁃ups by a woman in 24 hours to shame would be an understatement,considering that the Australian fitness enthusiast nearly doubled it.The achieve⁃ment began as a wild proposition from her husband and coach,and even though initially she just laughed at the idea of challenging a world record,it eventually started to make sense.Olivia trained for three months before taking on the challenge in September of last year,but 12 hours into her attempt,she pulled a bicep tendon(肱二头肌腱),which made her unable to perform pull⁃ups anymore.She had to cancel the whole thing,but after healing for a few months,she was back to breaking the Guinness World Record.
基金supported by the National Natural Science Foundation of China(30270187)
文摘A new Megaselia species： Megaselia angustirostris Fang ＆ Liu, sp. nov., is described and illustrated and two species of the genus, M. nigra （Meigen） and M. albicaudata （Wood）, are reported for the first time from China. The type specimens are deposited in College of Biological and Environmental Engineering, Shenyang University.
