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Federated Learning Model for Auto Insurance Rate Setting Based on Tweedie Distribution

工程与科学中的计算机建模(英文) 2024年第1期138卷 827-843页

作者： Tao Yin Changgen Peng Weijie Tan Dequan Xu Hanlin Tang State Key Laboratory of Public Big Data Guizhou UniversityGuiyang550025China Guizhou Big Data Academy Guizhou UniversityGuiyang550025China Key Laboratory of Advanced Manufacturing technology Ministry of EducationGuizhou UniversityGuiyang550025China College of Computer Science and technology Guizhou UniversityGuiyang550025China ChinaDataPay Company Guiyang550025China

In the assessment of car insurance claims,the claim rate for car insurance presents a highly skewed probability distribution,which is typically modeled using Tweedie *** traditional approach to obtaining the Tweedie regression model involves training on a centralized dataset,when the data is provided by multiple parties,training a privacy-preserving Tweedie regression model without exchanging raw data becomes a *** address this issue,this study introduces a novel vertical federated learning-based Tweedie regression algorithm for multi-party auto insurance rate setting in data *** algorithm can keep sensitive data locally and uses privacy-preserving techniques to achieve intersection operations between the two parties holding the *** determining which entities are shared,the participants train the model locally using the shared entity data to obtain the local generalized linear model intermediate *** homomorphic encryption algorithms are introduced to interact with and update the model intermediate parameters to collaboratively complete the joint training of the car insurance rate-setting *** tests on two publicly available datasets show that the proposed federated Tweedie regression algorithm can effectively generate Tweedie regression models that leverage the value of data fromboth partieswithout exchanging *** assessment results of the scheme approach those of the Tweedie regressionmodel learned fromcentralized data,and outperformthe Tweedie regressionmodel learned independently by a single party.

关键词： Rate setting Tweedie distribution generalized linear models federated learning homomorphic encryption

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Vanadyl Sulfate Based Hole-Transporting Layer Enables Efficient Organic Solar Cells

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Chinese Journal of Chemistry 2024年第14期42卷 1644-1650页

作者： Mengdi Li Yuqing Sun Yang Cheng Chaowei Zhao Jicai Zhang Weiwei Li Research Center for Optoelectronic Materials and Devices School of Physical Science and TechnologyGuangxi UniversityNanningGuangxi530004 China Institute of Applied Chemistry Jiangxi Academy of SciencesNanchangJiangxi330096 China Beijing Advanced Innovation Center for Soft Matter Science and Engineering&State Key Laboratory of Organic-Inorganic Composites Beijing University of Chemical TechnologyBeijing100029 China

It remains an urgent task to develop alternative hole-transporting layer(HTL)materials beyond commonly used PEDOT:PSS to increase the shelf-life of organic solar cells(OSCs).Inorganic metal oxide type materials,such as NiO_(x),CoO_(x)and VO_(x),with suitable work functions have attracted numerous research attention *** this work,more abundant and easily accessible oxygenated salt,vanadyl sulfate(VOSO_(4))has been demonstrated to be excellent choice as HTL for *** VOSO_(4)-based HTL can be readily processed by spin-coating from the precursor solution with subsequent thermal annealing and UVO *** a consequence,a high power conversion efficiency(PCE)of 18.72%can be achieved for PM8:L8-BO based OSCs with the VOSO_(4)-based *** transmittance,smooth film surface,suitable energy level and high conductivity were revealed to contribute to the high OSC *** importantly,compared to device with PEDOT:PSS,VOSO_(4)-based OSCs exhibit improved stability when stored in the N_(2)filled glove *** being stored for 600 h,VOSO_(4)-based device can retain 89%of its initial ***,VOSO_(4)can be used as general HTL in PM6:BTP-BO-4Cl and PM6:IT-4F based OSCs,yielding high PCEs of 17.87%and 13.85%,respectively.

关键词： Organic solar cells Semiconductors Hole-transporting layers Vanadyl sulfate Power output Efficiency Vanadium Interfacial modification

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Dynamic transcriptome profiles and novel markers in bovine spermatogenesis revealed by single-cell sequencing

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Journal of Integrative Agriculture 2024年第7期23卷 2362-2378页

作者： Yuan Gao Fuxia Bai Qi Zhang Xiaoya An Zhaofei Wang Chuzhao Lei Ruihua Dang Key Laboratory of Animal Genetics Breeding and Reproduction of Shaanxi ProvinceCollege of Animal Science and TechnologyNorthwest A&F UniversityYangling 712100China College of Life Sciences Northwestern Polytechnical UniversityXi’an 710072China

Testicular development is an important biological process in male and requires interaction between the male germ cells and somatic ***,the mechanisms of testicular development in livestock,particularly in cattle,are poorly ***,cellular heterogeneity hinders the profiling of different cell types at different developmental *** this study,we first performed a single-cell transcriptomic study of the bovine testis development during puberty by using 10×genomics single-cell RNA sequencing(scRNA-seq).By collecting the scRNA-seq data from 11,083 cells from prepubertal and pubertal bovine testes,a high-resolution scRNA-seq atlas was described,identifying 9 somatic and 13 spermatogenic *** also distinguished several stage-specific marker genes for bovine germ cells and somatic cells,such as GRAF2 and MORC1 for SSC(spermatogonial stem cells),HJURP and TCF19 for differentiating spermatogonia,ARSE for immature Sertoli,CLEC12B for mature Sertoli,LOC112441470 for *** conclusion,we have examined the transcription levels and constructed the single-cell developmental maps of germ cells and somatic cells during testicular development in Angus *** datasets provided new insights into spermatogenesis and testicular somatic cell development in cattle.

关键词： scRNA-seq cattle spermatogenesis testis development

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A scalable one-pot strategy for the development of polymer electrolytes adaptable to room-temperature high-voltage lithium batteries

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Chinese Chemical Letters 2024年第3期35卷 461-467页

作者： Yue Guo Xinxin Qu Zhen Li Ruiyuan Tian Xiaokong Liu State Key Laboratory of Supramolecular Structure and Materials College of ChemistryJilin UniversityChangchun 130012China Key Laboratory of Physics and technology for Advanced Batteries(Ministry of Education) College of PhysicsJilin UniversityChangchun 130012China

Poly(ethylene oxide)(PEO)polymer electrolytes(PEs)have been commercially applied in LiFePO_(4)||Li solid-state lithium batteries(SSLBs).However,it remains challenging to develop PEO-based PEs applicable to the high-voltage SSLBs with higher energy density,owing to the poor electrochemical stability of ***,we report a scalable strategy for fabricating PEO-based PEs with high-voltage compatibility,by exploiting a new mechanism to stabilize the cathode-electrolyte interface in the highvoltage *** protocol only involves a one-pot synthesis procedure to covalently crosslink the PEO chains,in the presence of high-content lithium bis(trifluoromethylsulphonyl)imide(LiTFSI)salts and N,N-dimethylformamide(DMF).LiTFSI-DMF supramolecular aggregates are formed and firmly embedded in the polymer network,endowing the PE with high room-temperature ionic *** dissociated and highly concentrated TFSI^-anions can enter the Helmholtz layer close to the high-voltage cathode,leading to the formation of a thin and homogeneous cathode electrolyte interface(CEI),mainly composed of LiF,on the *** CEI with high electrochemical stability can effectively stabilize the cathode-electrolyte interface,enabling long-term stable cycling of the high-voltage LiCoO_(2)||Li and nickelrich NCM_(622)||Li batteries at room *** simplicity and scalability of the strategy makes the reported PEO-based PE potentially applicable in high-voltage SSLBs in practice.

关键词： Lithium batteries Polymer electrolytes Poly(ethylene oxide) Energy density High-voltage cathodes

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Optimal regularity of positive solutions of the Hénon-Hardy equation and related equations

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Science China Mathematics 2024年

作者： Zongming Guo Fangshu Wan College of Mathematics and Information Science Henan Normal University School of Mathematical Sciences University of Science and Technology of China

We present a new method to determine the optimal regularity of positive solutions u∈C4(Ω\{0})∩C0(Ω) of the Hénon-Hardy equation,i.e.,Δ2u=|x|~αupinΩ,(0.1)whereΩ?RN(N≥4) is a bounded smooth domain with 0∈Ω,α>-4,and p∈*** is clear that 0 is an isolated singular point of solutions of (0.1) and the optimal regularity of u inΩrelies on the parameterα.It is also important to see that the regularity of u at x=0 determines the regularity of u inΩ.We first establish asymptotic expansions up to arbitrary orders at x=0 of prescribed positive solutions u∈C4(Ω\{0})∩C0(Ω)of (0.1).Then we show that the regularity at x=0 of each positive solution u of (0.1) can be determined by some terms in asymptotic expansions of the related positive radial solution of the equation (0.1) withΩ=B,where B is the unit ball of *** main idea works for more general equations with singular weights.

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A proton-catalyzing prodrug for PDT and glycolysis inhibitionsynergistic therapy of tumor in spatiotemporal dimensions

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Science China Chemistry 2024年

作者： Miao Li Xueying Sun Xiuqin Ma Yang Tan Xiaoyi Jin Yi Wang Fan Yang Qian Li Honglei Zhan Xiaojun Peng School of Biological Engineering Dalian Polytechnic University State Key Laboratory of Fine Chemicals Dalian University of Technology

The reactive oxygen species(ROS) generation from photosensitizer in photodynamic therapy(PDT) is limited by tumor *** type-I photosensitizers, e.g., sulfur-substituted Nile blue, still rely on oxygen as the main center for transferring electrons to generate ROS. Cutting off the pathway of oxygen consumption in tumor can help photosensitizers overcome the limitation of low oxygen, in order to efficiently generate more ROS. It is known that glycolysis inhibitor 3-bromopyruvic acid(3-BP), which could specially target mitochondria, can provide more oxygen by inhibiting oxidative phosphorylation. Herein, we successfully designed and synthesized a new 3-BP-coupled sulfur-substituted Nile blue as prodrug(NBBP) for chemical/photodynamic synergistic therapy. Major results indicated that the protons in tumor catalyzed the hydrolysis of NBBP, inhibited photoinduced electron transfer between 3-BP and the photosensitizer in NBBP and further assisted the photosensitizer to be localized in mitochondria, utilizing local oxygen as much as possible and kill tumor cells more efficiently. Moreover, the glycolysis inhibition-induced autophagy was combined with PDT-induced autophagy, which could promote the deaths of tumor *** other remedies exploiting nanomaterials, this construction method of NBBP achieves the efficient synergy of photodynamic therapy and glycolysis inhibition, stronger than their theoretical addition, in spatiotemporal dimensions. Our study provides not only a highly efficient platform for tumor therapy but also a design approach for prodrugs with synergistic effects.

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Binary Program Vulnerability Mining Based on Neural Network

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Computers, Materials & Continua 2024年第2期78卷 1861-1879页

作者： Zhenhui Li Shuangping Xing Lin Yu Huiping Li Fan Zhou Guangqiang Yin Xikai Tang Zhiguo Wang School of Information and Software Engineering University of Electronic Science and Technology of ChinaChengdu611731China School of Electrical and Computer Engineering University ofWaterlooWaterlooN2L 3G1Canada

Software security analysts typically only have access to the executable program and cannot directly access the source code of the *** poses significant challenges to security *** it is crucial to identify vulnerabilities in such non-source code programs,there exists a limited set of generalized tools due to the low versatility of current vulnerability mining ***,these tools suffer from some *** terms of targeted fuzzing,the path searching for target points is not streamlined enough,and the completely random testing leads to an excessively large search ***,when it comes to code similarity analysis,there are issues with incomplete code feature extraction,which may result in information *** this paper,we propose a cross-platform and cross-architecture approach to exploit vulnerabilities using neural network obfuscation *** leveraging the Angr framework,a deobfuscation technique is introduced,along with the adoption of a VEX-IR-based intermediate language conversion *** combination allows for the unified handling of binary programs across various architectures,compilers,and compilation ***,binary programs are processed to extract multi-level spatial features using a combination of a skip-gram model with self-attention mechanism and a bidirectional Long Short-Term Memory(LSTM)***,the graph embedding network is utilized to evaluate the similarity of program *** on these similarity scores,a target function is determined,and symbolic execution is applied to solve the target *** solved content serves as the initial seed for targeted *** binary program is processed by using the de-obfuscation technique and intermediate language transformation method,and then the similarity of program functions is evaluated by using a graph embedding network,and symbolic execution is performed based on these similarity *** approach facilitates

关键词： Vulnerability mining de-obfuscation neural network graph embedding network symbolic execution

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Spectral Selectivity of CdTe Cells with Substrate Configuration for Photovoltaic/Thermal Applications

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Journal of Thermal Science 2024年第4期33卷 1542-1553页

作者： CHEN Ken HU Kongfu ZHAO Bin CHEN Tao HAO Yong PEI Gang Department of Thermal Science and Energy Engineering University of Science and Technology of ChinaHefei230027China Key Laboratory of Solar Thermal Conversion of Anhui Province Hefei230027China Hefei National Laboratory for Physical Sciences at Microscale Department of Materials Science and EngineeringUniversity of Science and Technology of ChinaHefei230026China Institute of Engineering Thermophysics Chinese Academy of SciencesBeijing100190China university of Chinese Academy of Sciences Beijing100049China

Existing photovoltaic cells with high infrared emissivity generate huge radiative heat loss in photovoltaic/thermal applications and degrade the photothermal *** purpose of this work is to evaluate the full spectral absorptivity of CdTe cells to find a spectrally selective photovoltaic cell for photovoltaic/thermal *** this end,the solar absorptivity and mid-infrared thermal emissivity of CdTe cells were tested by ellipsometry,UV-Vis-NIR spectrophotometer,and Fourier transform infrared *** experimental results show that the AM 1.5 solar spectrum weighted absorptivity of the substrate configuration CdTe cell reaches 0.91,and the mid-infrared emissivity is only 0.29,while the superstrate configuration cell emissivity is as high as *** research shows that substrate configuration with a transparent conductive layer on top can be flexibly grown on metal foils and has spectral selectivity with high solar absorptivity and low mid-infrared emissivity should be considered in the future for photovoltaic/thermal applications.

关键词： photovoltaic/thermal spectral selectivity substrate configuration CdTe cell ITO

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A high-performance electrocatalyst for oxygen reduction derived from copolymer-anchored polyoxometalates

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Nano Research 2024年第6期17卷 5197-5205页

作者： Yue Du Wenxue Chen Zhiyi Zhong Zhixian Shi Yulin Zhang Xuanning Chen Yisi Liu Dongbin Xiong Lina Zhou Zhenhui Liu Mingbo Zheng Hubei Key Laboratory of Photoelectric Materials and Devices&College of Material Science and Engineering Hubei Normal UniversityHuangshi 435002China College of Materials Science and technology Nanjing University of Aeronautics and AstronauticsNanjing 210016China

The development and synthesis of cathode electrocatalysts with high activity and durable stability for metal-air batteries is an important challenge in the area of ***,we introduce a novel in-situ nitriding and phosphating strategy for producing W_(3)N_(4)and WP from phosphotungstic acid(HPW)-polyaniline-phytic acid-Fe3+organic-inorganic hybrid *** final material has a three-dimensional porous framework with W_(3)N_(4)-WP heterostructures embedded in the carbon matrix(W_(3)N_(4)-WP@NPC).As-made materials exhibit exceptional electrocatalytic performance for the oxygen reduction reaction(ORR),with a diffusion-limiting current density of 6.9 mA·cm^(−2)and a half-wave potential of 0.82 *** a Zn-air primary cathode,the W_(3)N_(4)-WP@NPC assembled battery can provide a relatively high peak power density(194.2 mW·cm^(−2)).As a Zn-air secondary air-cathode,it has great cycling stability over 500 *** work provides a simple and efficient method for rationally designing high-performance air cathodes from copolymer-anchored polyoxometalates.

关键词： W_(3)N_(4)-WP heterojunctions copolymer-anchored polyoxometalates oxygen reduction reaction Zn-air battery

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Innovations in measuring and mitigating phytohemagglutinins,a key food safety concern in beans

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Food Quality and Safety 2024年第1期8卷 1-11页

作者：吕晨泽房智慧杨素宁康徐敏 Arnaud Buhot Yanxia Hou 胡培雅徐沛 Key Laboratory of Specialty Agri-products Quality and Hazard Controlling technology of Zhejiang Province College of Life SciencesChina Jiliang UniversityHangzhouChina university Grenoble Alpes CEACNRSINAC-SyMMESGrenobleFrance

Phytohemagglutinin(PHA)is a seed storage protein and a type of lectin originally discovered in the common bean(Phaseolus vulgaris)for its blood-agglutinating *** to its interactions with gut epithelia and digestive enzymes and its potential to trigger allergic reactions,PHA can lead to various symptoms in the human *** a result,it has been regarded as a signifcant antinutritional factor in beans and other *** several published works have summarized its structural,biochemical,and toxicological features,there is a scarcity of literature that reviews the detection,quantifcation,and reduction of PHA in beans,which is fundamental for the development of safer bean *** this review,we present a comprehensive analysis of traditional and innovative bio-sensing methods for measuring PHA,including the recently available ultrapure liquid chromatography–tandem mass spectrometry and emerging aptamer sensor-based techniques,while discussing their respective advantages and *** also revisit existing studies dedicated to creating PHA-depleted common bean varieties and explore the potential for reducing PHA content in beans without compromising their resistance to biotic ***,we offer insights into the potential for controlling PHA content using the latest biotechnologies and breeding ***,this review compiles rare and valuable information from studies that solely focuses on detection and depletion of PHA to shed light on and apply technological advancements in addressing potential food safety risks associated with the consumption of common beans.

关键词： Phytohemagglutinin common bean food safety breeding quantifcation.

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