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A Deepfake Detection Algorithm Based on Fourier Transform of Biological Signal

Computers, Materials & Continua 2024年第6期79卷 5295-5312页

作者： Yin Ni Wu zeng Peng Xia guang Stanley Yang Ruochen Tan School of Electrical and Electronic Engineering Wuhan Polytechnic UniversityWuhan430023China School of Mathematics and Computer Science Wuhan Polytechnic UniversityWuhan430048China Paul g.Allen School of Computer Science and Engineering University ofWashingtonSeattleWA98195USA School of Computer Science and Engineering University of CaliforniaSanDiegoCA92093USA

Deepfake-generated fake faces,commonly utilized in identity-related activities such as political propaganda,celebrity impersonations,evidence forgery,and familiar fraud,pose new societal *** current deepfake generators strive for high realism in visual effects,they do not replicate biometric signals indicative of cardiac *** this gap,many researchers have developed detection methods focusing on biometric *** methods utilize classification networks to analyze both temporal and spectral domain features of the remote photoplethysmography(rPPg)signal,resulting in high detection ***,in the spectral analysis,existing approaches often only consider the power spectral density and neglect the amplitude spectrum—both crucial for assessing cardiac *** introduce a novel method that extracts rPPg signals from multiple regions of interest through remote photoplethysmography and processes them using Fast Fourier Transform(FFT).The resultant time-frequency domain signal samples are organized into matrices to create Matrix Visualization Heatmaps(MVHM),which are then utilized to train an image classification ***,we explored various combinations of time-frequency domain representations of rPPg signals and the impact of attention *** experimental results show that our algorithm achieves a remarkable detection accuracy of 99.22%in identifying fake videos,significantly outperforming mainstream algorithms and demonstrating the effectiveness of Fourier Transform and attention mechanisms in detecting fake faces.

关键词： Deepfake detector remote photoplethysmography fast fourier transform spatial attention mechanism

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A Life-skills-based HIV/AIDS Prevention Education for Rural Students of Primary Schools in China:What Changed? What Have We Learned?

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Biomedical and Environmental Sciences 2010年第5期23卷 409-419页

作者： WEI LIAO JINg-MEI JIANg BIN YANg XIN zeng SU-SU LIAO Institute of Basic Medical Sciences Chinese Academy of Medical Sciences School of Basic Medicine Peking Union Medical CollegeBeijing 100005China Hainan Center for Disease Control & Prevention Haikou 570203HainanChina Education Department of Hainan Province Haikou 570203HainanChina

Objective To evaluate a four-hour life-skills-based HIV/AIDS prevention curriculum among 5th grade students in rural primary schools of Hainan *** The study included two *** one （September 2006-May 2007） was a pre-post-quasi experimental design;a total of 2 413 students aged 9 to 14 years from fifth grade classes of nine primary schools completed a baseline survey （1 720 students were in the intervention group,693 in the control group）,and over 98% of them took part in a short *** experimental curriculum was provided to the intervention *** stage two （September 2008）,a cross-sectional questionnaire was administered to 6 923 students in 7th grade classes of eight middle schools in the same study *** were 1 437 students in the intervention group when the curriculum was *** Students tended to score higher in areas of HIV/AIDS related knowledge and attitudes,if they were younger than average,lived in the county seat,had access to the internet,and their parents had completed higher levels of *** analysis showed that,after controlling for characteristics such as family and community factors,the total effects of curriculum on knowledge in the short-term model increased remarkably compared with the baseline,and maintained major contributions to knowledge in the mid-term *** positive effect of knowledge on attitudes was significantly improved in the short-term model as *** A life-skills based curriculum can improve HIV/AIDS related knowledge and self-perceived level of life-skills among primary school students in rural areas in a short time,and these positive effects can still be observed at least 2 years post participation in the curriculum.

关键词： Adolescent HIV/AIDS prevention Life-skills education Effect evaluation Rural area Intervention research

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hale gas reservoir modeling and production evaluation considering complex gas transport mechanisms and dispersed distribution of kerogen

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Petroleum Science 2021年第1期18卷 195-218页

作者： Jie zeng Jishan Liu wai Li Yee-Kwong Leong Derek Elsworth Jianchun guo School of Engineering The University of Western Australia35 Stirling HighwayPerthWA 6009Australia Department of Energy and Mineral Engineering G3 Center and Energy InstituteThe Pennsylvania State UniversityUniversity ParkPA 16802USA State Key Laboratory of Oil and gas Reservoir geology and Exploitation Southwest Petroleum UniversityChengdu 610500China

Stimulated shale reservoirs consist of kerogen,inorganic matter,secondary and hydraulic *** dispersed distribution of kerogen within matrices and complex gas flow mechanisms make production evaluation *** we establish an analytical method that addresses kerogen-inorganic matter gas transfer,dispersed kerogen distribution,and complex gas flow mechanisms to facilitate evaluating gas *** matrix element is defined as a kerogen core with an exterior inorganic *** most previous models,we merely use boundary conditions to describe kerogen-inorganic matter gas transfer without the instantaneous kerogen gas source *** is closer to real inter-porosity flow conditions between kerogen and inorganic *** diffusion,surface diffusion,adsorption/desorption,and slip corrected flow are involved in matrix gas ***-fracture coupling is realized by using a seven-region linear flow *** model is verified against a published model and field *** reveal that inorganic matrices serve as a major gas source especially at early *** provides limited contributions to production even under a pseudo-steady *** properties’influence starts from the late matrix-fracture inter-porosity flow regime,while inorganic matter properties control almost all flow regimes except the early-mid time fracture linear flow *** contribution of different linear flow regions is also documented.

关键词： Analytical solution Shale gas reservoir Well performance Kerogen and inorganic matter

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Artificial intelligence system for outcome evaluations of human in vitro fertilization-derived embryos

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Chinese Medical Journal 2024年第16期137卷 1939-1949页

作者： Ling Sun Jiahui Li Simiao zeng Qiangxiang Luo Hanpei Miao Yunhao Liang Linling Cheng Zhuo Sun wa Hou Tai Yibing Han Yun Yin Keliang Wu Kang Zhang Department of Reproductive Medicine Guangzhou Women and Children’s Medical CenterGuangzhou Medical UniversityGuangzhouGuangdong 510623China guangzhou National Laboratory GuangzhouGuangdong 510000China Department of Reproductive Medicine Jiangmen Central HospitalJiangmenGuangdong 529000China Department of Ophthalmology Dongguan People’s HospitalThe First School of Clinical MedicineSouthern Medical UniversityDongguanGuangdong 523000China Institute for Artificial Intelligence in Medicine Faculty of MedicineMacao University of Science and TechnologyMacao Special Administrative Region 999078China Wenzhou Eye Hospital Institute for Advanced Studies on Eye Health and DiseasesWenzhou Medical UniversityWenzhouZhejiang 325000China Kiang Wu Hospital Macao Special Administrative Region 999078China Faculty of Business City University of MacaoMacao Special Administrative Region 999078China State Key Laboratory of Reproductive Medicine and Offspring Health Center for Reproductive MedicineInstitute of WomenChildren and Reproductive Health and Key laboratory of Reproductive Endocrinology of Ministry of EducationShandong UniversityJinanShandong 250000China

Background:In vitro fertilization(IVF)has emerged as a transformative solution for ***,achieving favorable live-birth outcomes remains *** clinical IVF practices in IVF involve the collection of heterogeneous embryo data through diverse methods,including static images and temporal ***,traditional embryo selection methods,primarily reliant on visual inspection of morphology,exhibit variability and are contingent on the experience of ***,an automated system that can evaluate heterogeneous embryo data to predict the final outcomes of live births is highly ***:We employed artificial intelligence(AI)for embryo morphological grading,blastocyst embryo selection,aneuploidy prediction,and final live-birth outcome *** developed and validated the AI models using multitask learning for embryo morphological assessment,including pronucleus type on day 1 and the number of blastomeres,asymmetry,and fragmentation of blastomeres on day 3,using 19,201 embryo photographs from 8271 patients.A neural network was trained on embryo and clinical metadata to identify good-quality embryos for implantation on day 3 or day 5,and predict live-birth ***,a 3D convolutional neural network was trained on 418 time-lapse videos of preimplantation genetic testing(PgT)-based ploidy outcomes for the prediction of aneuploidy and consequent live-birth ***:These two approaches enabled us to automatically assess the implantation *** combining embryo and maternal metrics in an ensemble AI model,we evaluated live-birth outcomes in a prospective cohort that achieved higher accuracy than experienced embryologists(46.1%vs.30.7%on day 3,55.0%vs.40.7%on day 5).Our results demonstrate the potential for AI-based selection of embryos based on characteristics beyond the observational abilities of human clinicians(area under the curve:0.769,95%confidence interval:0.709-0.820).These findings coul

关键词： Artificial intelligence Fertilization Embryo implantation Blastocyst Aneuploidy Neural networks,computer Live birth

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In situ preparation of visible-light-driven carbon quantum dots/NaBiO3 hybrid materials for the photoreduction of Cr(Ⅵ)

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Journal of Environmental Sciences 2021年第1期33卷 100-109页

作者： Yixiao Wu Chunlong Chen Shu He Xuesong Zhao Shaobin Huang gongchang zeng Yingying You Ying Cao Lishan Niu School of Environment and Energy South China University of TechnologyHigher Education Mega CenterGuangzhou 510006China Qiannan Normal University for Nationalities Duyun 558000China Physical Sciences Division Physical and Computational Sciences DirectoratePacific Northwest National LaboratoryRichlandWA 99354USA Department of Chemical Engineering University of WashingtonSeattleWA 98101USA School of Enuironment Higher Education Mega CenterHarbin Institute of TechnologyHarbin 150000China

In this study,different carbon quantum dots(CQDs)/NaBiO3 hybrid materials were synthesized as photocatalysts to effectively utilize visible light for the photocatalytic degradation of contaminants *** hybrid materials exhibit an enhanced photocatalytic reduction of hexavalent chromium(Cr(Ⅵ))in the aqueous ***-dimensional nanoparticles of CQDs were embedded within the two-dimensional NaBiO3 nanosheets by the hydrothermal *** with that of the pure NaBiO3 nanosheets,the photocatalytic performance of the hybrid catalysts was significantly high and 6 wt.%CQDs/NaBiO3 catalyst exhibited better photocatalytic *** performed the first-principles density functional theory calculations to study the interfacial properties of pure NaBiO3 nanosheets and hybrid photocatalysts,and confirmed the CQDs played an important role in the CQDs/NaBiO3 *** experimental results indicated that the enhanced reduction of Cr(Ⅵ)was probably due to the high loading of CQDs(electron acceptor)on NaBiO3,which made NaBiO3 nanomaterials to respond in visible light and significantly improved their electron-hole separation efficiency.

关键词： Carbon quantum dots/NaBiO3 Hybrid materials Visible light response Cr(Ⅵ)reduction

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持久性发疹性斑状毛细血管扩张症1例

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中国皮肤性病学杂志 2014年第12期28卷 1267-1268,1274页

作者：曾世华瓦庆彪涂媛成都市第二人民医院皮肤科四川成都610017 成都市第二人民医院病理科四川成都610017

患者男,42岁。面、颈、躯干及双上肢持续性红斑并色素沉着6年,加重伴丘疹2年。皮损组织病理示:表皮基底层少许色素沉着,真皮浅层毛细血管轻度扩张,周围少许淋巴细胞浸润及散在单一核细胞浸润;giemsa染色(+)。诊断:持久性发疹性斑状毛细... 详细信息

患者男,42岁。面、颈、躯干及双上肢持续性红斑并色素沉着6年,加重伴丘疹2年。皮损组织病理示:表皮基底层少许色素沉着,真皮浅层毛细血管轻度扩张,周围少许淋巴细胞浸润及散在单一核细胞浸润;giemsa染色(+)。诊断:持久性发疹性斑状毛细血管扩张症。

关键词：持久性发疹性斑状毛细血管扩张症

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Advances in low-field nuclear magnetic resonance(NMR) technologies applied for characterization of pore space inside rocks:a critical review

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Petroleum Science 2020年第5期17卷 1281-1297页

作者： Jian-Chun guo Hang-Yu Zhou Jie zeng Kun-Jie wa.g Jie Lai Yu-Xuan Liu State Key Laboratory of Oil and gas Reservoir geology and Exploitation Southwest Petroleum UniversityChengdu 610500China Department of Chemical Engineering School of EngineeringThe University of Western Australia35 Stirling HighwayPerthWA 6009Australia Downhole Operation Branch Southwest Petroleum Engineering Co.LtdSinopecDeyang 618014China

NMR serves as an important technique for probing rock pore space,such as pore structure characterization,fluid identification,and petrophysical property testing,due to the reusability of cores,convenience in sample processing,and time efficiency in laboratory *** practice,NMR signal collection is normally achieved through polarized nuclei relaxation which releases crucial relaxation messages for result *** impetus of this work is to help engineers and researchers with petroleum background obtain new insights into NMR principals and extend existing methodologies for characterization of unconventional *** article first gives a brief description of the development history of relaxation theories and models for porous ***,the widely used NMR techniques for characterizing petrophysical properties and pore structures are ***,limitations and deficiencies of them are ***,future work on improving these insufficiencies and approaches of enhancement applicability for NMR technologies are discussed.

关键词： Low-field NMR Critical review Relaxation theory Unconventional formation

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Response of Two Jerusalem Artichoke (Helianthus tuberosus)Cultivars Differing in Tolerance to Salt Treatment

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Pedosphere 2010年第4期20卷 515-524页

作者： LONg Xiao-Hua HUANg zeng-Rong HUANg Yu-Ling KANg Jian ZHANg Zhen-Hua LIU Zhao-Pu College of Resources and Environmental Sciences Nanjing Agricultural University Nanjing 210095 （China） Soil Science and Plant Nutrition School of Earth and Environment The University of Western Australia 35 StirlingHighway Crawley WA 6009 （Australia）

To explore genetic variability for two Jerusalem artichoke cultivated with 75% seawater irrigation for six years） and N7 （Helianthus tuberosus） cultivars, N1 （the sixth-generation （a general variety）, a experiment was conducted to study the changes in physiological attributes under different concentrations （0%, 10% and 25% of seawater concentration in greenhouse and 0%, 30% and 50% of seawater concentration in the field） of seawater salinity stress. In the greenhouse experiment, decreases of dry growth rate, but increases of dry matter percentage and membrane injury occurred in both the genotypes at 10% and 25% seawater treatments, although lesser cell membrane damage was observed in N1 than N7. N1 accumulated greater contents of Na^＋, Cl^-, soluble sugar and proline in leaves compared with NT. In the field experiment, the yields of shoot, root and tuber, and the contents of total-sugar and inulin in tubers of N1 were higher than those of N7. Lesser degree of salt injury in N1 indicated that the relatively salt-tolerant cultivar had higher K^＋/Na^＋ ratio, lower Na^＋/Ca^2＋ ratio, and the salt-induced enhancement of osmotic adjustment.

关键词： cell membrane stability genetic variabilities inorganic ions malondialdehyde seawater salinity stress

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色素性痒疹1例

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中国皮肤性病学杂志 2012年第2期26卷 155-156页

作者：曾雪崔炳南刘瓦利李理中国中医科学院广安门医院皮肤科北京100053 中国中医科学院广安门医院病理科北京100053

患者女,躯干部出现皮疹伴瘙痒3个月。皮损可自行消退,消退后遗留色素沉着,皮损可反复出现。皮损组织病理示:表皮轻度角化亢进,表皮乳头瘤样增生,基底细胞灶状液化变性,真皮浅层血管周围淋巴、单核细胞浸润。诊断:色素性痒疹。

关键词：痒疹色素性

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Highly efficient and genotype-independent barley gene editing based on anther culture

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Plant Communications 2021年第2期2卷 89-101页

作者： Yong Han Sue Broughton Li Liu Xiao-Qi Zhang Jianbin zeng Xiaoyan He Chengdao Li Western Barley genetics Alliance College of ScienceHealthEngineering and EducationMurdoch UniversityMurdochWA 6150Australia Department of Primary Industries and Regional Development 3 Baron-Hay CourtSouth PerthWA 6151Australia Western Australian State Agricultural Biotechnology Centre Murdoch UniversityMurdochWA 6150Australia College of Agronomy Qingdao Agricultural UniversityQingdaoShandong 266109China

Recalcitrance to tissue culture and genetic transformation is the major bottleneck for gene manipulation in *** barley,immature embryos of golden Promise have typically been used as explants for ***,the genotype dependence of this approach limits the genetic modification of commercial ***,we developed an anther culture-based system that permits the effective creation of transgenic and gene-edited plants from commercial barley *** protocol was tested in golden Promise and four Australian varieties,which differed in phenology,callus induction,and green plant regeneration ***-mediated transformation was performed on microspore-derived callus to target the HvPDS gene,and T0 albinos with targeted mutations were successfully obtained from commercial *** editing of three targets was achieved with an average mutation rate of 53%in the five *** 51 analyzed T0 individuals,Cas9 induced a large proportion(69%)of single-base indels and two-base deletions in the target sites,with variable mutation rates among targets and *** ontarget and off-target activities were detected in T1 *** with immature embryo protocols,this genotype-independent platformcan deliver a high editing efficiency and more regenerant plants within a similar time *** shows promise for functional genomics and the application of CRISPR technologies for the precise improvement of commercial varieties.

关键词： Agrobacterium CRISPR genetic transformation Hordeum vulgare off-target targeted mutation

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