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Predicting Credit Bond Default with Deep Learning: Evidence from China

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Journal of Social Computing 2024年第1期5卷 36-45页

作者： Ning zhang Wenhe Li Haoxiang Chen Binshu Jia Pei Deng School of Information Central University of Finance and EconomicsBeijing 100081China SDIC Taikang Trust Co. Ltd.Beijing 100034China

China’s credit bond market has rapidly expanded in recent ***,since 2014,the number of credit bond defaults has been increasing rapidly,posing enormous potential risks to the stability of the financial *** study proposed a deep learning approach to predict credit bond defaults in the Chinese market.A convolutional neural network(CNN)was selected as the classification model and to reduce the extreme imbalance between defaulted and non-defaulted bonds,and a generative adversarial network(GAN)was used as the oversampling *** on 31 financial and 20 non-financial indicators,we collected Wind data on all credit bonds issued and matured or defaulted from 2014 to *** experimental results showed that our GAN+CNN approach had superior predictive performance with an area under the curve(AUC)of 0.9157 and precision of 0.8871 compared to previous research and other commonly used classification models-including the logistic regression,support vector machine,and fully connected neural network models-and oversampling techniques-including the synthetic minority oversampling technique(SMOTE)and Borderline SMOTE *** one-year predictions,indicators of solvency,capital structure,and fundamental properties of bonds are proved to be the most important indicators.

关键词： credit bond default prediction convolutional neural network imbalanced data processing generative adversarial network

Genome-edited rabbits:Unleashing the potential of a promising experimental animal model across diverse diseases

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Zoological Research 2024年第2期45卷 253-262页

作者： Yang Han Jiale Zhou Renquan zhang Yuru Liang Liangxue Lai Zhanjun Li Key Laboratory of Zoonosis Research Ministry of EducationCollege of Animal ScienceJilin UniversityChangchunJilin 130062China CAS Key Laboratory of Regenerative Biology Guangdong Provincial Key Laboratory of Stem Cell and Regenerative MedicineSouth China Institute for Stem Cell Biology and Regenerative MedicineGuangzhou Institutes of Biomedicine and HealthChinese Academy of SciencesGuangzhouGuangdong 510530China Guangzhou Regenerative Medicine and Health Guang Dong Laboratory(GRMH-GDL) GuangzhouGuangdong 510005China Institute for Stem Cell and Regeneration Chinese Academy of SciencesBeijing 100101China

Animal models are extensively used in all aspects of biomedical research,with substantial contributions to our understanding of diseases,the development of pharmaceuticals,and the exploration of gene *** field of genome modification in rabbits has progressed ***,recent advancements,particularly in CRISPR/Cas9-related technologies,have catalyzed the successful development of various genome-edited rabbit models to mimic diverse diseases,including cardiovascular disorders,immunodeficiencies,agingrelated ailments,neurological diseases,and ophthalmic *** models hold great promise in advancing biomedical research due to their closer physiological and biochemical resemblance to humans compared to *** review aims to summarize the novel gene-editing approaches currently available for rabbits and present the applications and prospects of such models in biomedicine,underscoring their impact and future potential in translational medicine.

关键词： Genome editing Animal model Rabbit CRISPR/Cas9 Genetic diseases

Progress in the Correlation Between Inflammasome NLRP3 and Liver Fibrosis

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Journal of Clinical and Translational Hepatology 2024年第2期12卷 191-200页

作者： Meihua Sun Yanqing zhang Anbing Guo Zongting Xia Lijun Peng School of Clinical Medicine Weifang Medical UniversityWeifangShandongChina Department of Gastroenterology Linyi People’s HospitalLinyiShandongChina

Liver fibrosis is a reversible condition that occurs in the early stages of chronic liver *** develop effective treatments for liver fibrosis,understanding the underlying mechanism is *** NOD-like receptor protein 3(NLRP3)inflammasome,which is a part of the innate immune system,plays a crucial role in the progression of various inflammatory ***3 activation is also important in the development of various liver diseases,including viral hepatitis,alcoholic or nonalcoholic liver disease,and autoimmune liver *** review discusses the role of NLRP3 and its associated molecules in the development of liver *** also highlights the signal pathways involved in NLRP3 activation,their downstream effects on liver disease progression,and potential therapeutic targets in liver *** research is encouraged to develop effective treatments for liver fibrosis.

关键词： NLRP3 Liver disease Liver fibrosis Hepatic stellate cells Macrophages

Effects of arbuscular mycorrhizal fungi on carbon assimilation and ecological stoichiometry of maize under combined abiotic stresses

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Journal of Plant Ecology 2024年第2期17卷 74-88页

作者： Qiong Ran Songlin zhang Muhammad Arif Xueting Yin Shanshan Chen Guangqian Ren School of Management Chongqing University of TechnologyChongqing 400054China Key Laboratory of Reservoir Aquatic Environment Chongqing Institute of Green and Intelligent TechnologyChinese Academy of SciencesChongqing 400714China Key Laboratory of Eco-environments in Three Gorges Reservoir Region(Ministry of Education) State Cultivation Base of Eco-agriculture for Southwest Mountainous LandSchool of Life SciencesSouthwest UniversityChongqing 400715China Institute of Environment and Ecology Academy of Environmental Health and Ecological SecuritySchool of the Environment and Safety EngineeringJiangsu UniversityZhenjiang 212013China

Arbuscular mycorrhizal fungi(AMF)enhance plant tolerance to abiotic stresses like salinity and improve crop ***,their effects are variable,and the underlying cause of such variation remains largely *** study aimed to assess how drought modifed the effect of AMF on plant resistance to high calcium-saline stress.A pot experiment was performed to examine how AMF inoculation affects the growth,photosynthetic activity,nutrient uptake and carbon(C),nitrogen(N)and phosphorus(P)stoichiometric ratio(C:N:P)of maize under high calcium stress and contrasting water *** results showed that high calcium stress signifcantly reduced mycorrhizal colonization,biomass accumulation,C assimilation rate and C:N stoichiometric ratio in plant ***,the adverse effects of calcium stress on photosynthesis were exacerbated under *** inoculation profoundly alleviated such reductions under drought and saline ***,it barely affected maize performance when subjected to calcium stress under well-watered ***,watering changed AMF impact on nutrient allocation in plant *** well-watered conditions,AMF stimulated P accumulation in roots and plant growth,but did not induce leaf P accumulation proportional to C and N,resulting in increased leaf C:P and N:P ratios under high calcium *** contrast,AMF decreased N content and the N:P ratio in leaves under ***,AMF inoculation improved maize resistance to calcium-salt stress through enhanced photosynthesis and modulation of nutrient stoichiometry,particularly under water defcit *** results highlighted the regulatory role of AMF in carbon assimilation and nutrient homeostasis under compound stresses,and provide signifcant guidance on the improvement of crop yield in saline and arid regions.

关键词： arbuscular mycorrhizal fungi compound abiotic stresses C:N:P stoichiometry induced systemic resistance calcium-salt stress

Towards experimental studying the airborne sound insulation of light frame walls with staggered studs

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Science China(Technological Sciences) 2024年第7期67卷 2230-2243页

作者： zhang YuCai YUE Kong XIE YiFan CHENG XiangYu SHI XinLei WU Peng ZHAO Hui College of Civil Engineering Nanjing Tech UniversityNanjing 211800China Key Laboratory of Architectural Acoustic Environment of Anhui Higher Education Institutes Hefei 230601China Nanjing Gongda Construction Technology Co.Ltd. Nanjing 211800China

Light frame walls(LFWs) serve as common partition walls in prefabricated buildings due to their lightweight nature, costeffectiveness, energy efficiency, and adaptability for rapid on-site assembly. However, their acoustic insulation capability is hindered by issues such as sound bridges, resonance, and coincidence dips, resulting in inadequate sound insulation. This study aims to propose LFW designs with superior acoustic insulation suitable for practical engineering while meeting prevailing national standards. Nine full-scale LFW configurations were subjected to laboratory testing to evaluate the impact of staggered stud arrangements, stud types, and incorporation of compounded materials. The tests were performed between 100 and 5000 Hz,and the sound pressure level and reverberation time at 1/3 octave band were measured and used to calculate the weighted sound insulation index(Rw). Results demonstrated that the outlined design modifications significantly enhanced the sound insulation of the LFW. These modifications effectively mitigate the influence of sound bridges while addressing resonance and coincidence dips inherent in the wall system. Particularly noteworthy was the superior sound insulation achieved by staggered-stud LFWs with compounded materials, surpassing that of autoclaved lightweight concrete walls commonly used in prefabricated constructions despite having lesser thickness and surface density. Rwvalues increased from 43 to 54 dB compared to conventional LFWs, translating to a notable elevation in airborne sound insulation level from 4 to 7 as an internal separation component,meeting the requisite standards for most applications.

关键词： light frame wall staggered stud airborne sound insulation weighted sound insulation index

A Non-Stationary Beam-Enabled Stochastic Channel Model and Characterization over Non-Reciprocal Beam Patterns

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China Communications 2024年第10期21卷 43-58页

作者： zhang Jiachi Liu Liu Tan Zhenhui Wang Kai Li Lu Zhou Tao School of Electronic and Information Engineering Beijing Jiaotong UniversityBeijing 100044China Department of Police Information Shandong Police CollegeJinan 250200China School of Rail Transportation Shandong Jiaotong UniversityJinan 250357China

The multiple-input multiple-output(MIMO)-enabled beamforming technology offers great data rate and channel quality for next-generation *** this paper,we propose a beam channel model and enable it with time-varying simulation capability by adopting the stochastic geometry ***,clusters are generated located within transceivers'beam ranges based on the Mate?rn hardcore Poisson cluster *** line-of-sight,singlebounce,and double-bounce components are calculated when generating the complex channel impulse ***,we elaborate on the expressions of channel links based on the propagation-graph theory.A birth-death process consisting of the effects of beams and cluster velocities is also *** simulation results prove that the proposed model can capture the channel ***,the non-reciprocal beam patterns yield severe channel dispersion compared to the reciprocal patterns.

关键词： beam channel model channel non-stationarity non-reciprocal beam patterns stochastic geometry

Alloy strategy to synthesize Pt-early transition metal oxide interfacial catalysts

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Nano Research 2024年第4期17卷 3390-3397页

作者： Shi-Long Xu Hang Nan Wanqun zhang Yue Lin Sheng-Qi Chu Hai-Wei Liang Hefei National Research Center for Physical Sciences at the Microscale Department of ChemistryUniversity of Science and Technology of ChinaHefei 230026China School of Materials and Chemical Engineering Anhui Jianzhu UniversityHefei 230601China Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China

Metal oxide supported metal catalysts show promising catalytic performance in many industry-relevant ***,the enhancement of performance is often limited by the insufficient metal/metal oxide *** this work,we demonstrate a general synthesis of Pt-early transition metal oxide(Pt-MO_(x),M=Ti,Zr,V,and Y)catalysts with rich interfacial sites,which is based on the air-induced surface segregation and oxidation of M in the supported Pt-M alloy *** characterizations verify the dynamic structural response of Pt-M alloy catalysts to air and the formation of Pt-MO_(x) catalysts with abundant interfacial *** prepared Pt-TiO_(x) interfacial catalysts exhibit improved performance in hydrogenation reactions of benzaldehyde,nitrobenzene,styrene,and furfural,as a result of the heterolytic dissociation of H_(2) at Pt-metal oxide interfacial sites.

关键词： Pt-early transition metal oxide interfacial catalyst alloy oxidation strategy interfacial sites hydrogenation reactions heterolytic dissociation

Magnetic resonance imaging of extraocular rectus muscles abnormalities in acute acquired concomitant esotropia

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International Journal of Ophthalmology(English edition) 2024年第1期17卷 119-125页

作者： Jia-Yu Chen Li-Rong zhang Jia-Wen Liu Jie Hao Hui-Xin Li Qiong-Yue zhang Zhao-Hui Liu Jing Fu Beijing Tongren Eye Center Beijing Tongren HospitalBeijing Key Laboratory of Ophthalmology&Visual SciencesCapital Medical UniversityBeijing 100176China Department of Radiology Beijing Tongren HospitalCapital Medical UniversityBeijing 100176China Department of Industrial Engineering and Operation Research University of CaliforniaBerkeley 94720USA

AIM:To investigate the difference of medial rectus(MR)and lateral rectus(LR)between acute acquired concomitant esotropia(AACE)and the healthy controls(HCs)detected by magnetic resonance imaging(MRI).METHODS:A case-control *** subjects with AACE and eighteen HCs were *** scanning data were conducted in target-controlled central gaze with a 3-Tesla magnetic resonance *** muscles(EOMs)were scanned in contiguous image planes 2-mm thick spanning the EOM origins to the globe *** form posterior partial volumes(PPVs),the LR and MR cross-sections in the image planes 8,10,12,and 14 mm posterior to the globe were summed and multiplied by the 2-mm slice *** data were classified according to the right eye,left eye,dominant eye,and non-dominant eye,and the differences in mean cross-sectional area,maximum cross-sectional area,and PPVs of the MR and LR muscle in the AACE group and HCs group were compared under the above classifications ***:There were no significant differences between the two groups of demographic *** mean cross-sectional area of the LR muscle was significantly greater in the AACE group than that in the HCs group in the non-dominant eyes(P=0.028).The maximum cross-sectional area of the LR muscle both in the dominant and non-dominant eye of the AACE group was significantly greater than the HCs group(P=0.009,P=0.016).For the dominant eye,the PPVs of the LR muscle were significantly greater in the AACE than that in the HCs group(P=0.013),but not in the MR muscle(P=0.698).CONCLUSION:The size and volume of muscles dominant eyes of AACE subjects change significantly to overcome binocular *** LR muscle become larger to compensate for the enhanced convergence in the AACE.

关键词： acute acquired concomitant esotropia magnetic resonance imaging extraocular muscles

A near-zero quiescent power breeze wake-up anemometer based on a rolling-bearing triboelectric nanogenerator

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Microsystems & Nanoengineering 2024年第2期10卷 241-249页

作者： Xianpeng Fu Zhichao Jiang Jie Cao Zefang Dong Guoxu Liu Meiling Zhu Chi zhang CAS Center for Excellence in Nanoscience Beijing Key Laboratory of Micro-nano Energy and SensorBeijing Institute of Nanoenergy and NanosystemsChinese Academy of SciencesBeijing101400China School of Nanoscience and Engineering University of Chinese Academy of SciencesBeijing100049China Center on Nanoenergy Research Guangxi Colleges and Universities Key Laboratory of Blue Energy and Systems IntegrationSchool of Physical Science&TechnologyGuangxi UniversityNanning530004China Institute of Intelligent Flexible Mechatronics Jiangsu UniversityZhenjiang212013China College of Engineering Mathematics and Physical ScienceUniversity of ExeterExeterEX44QFUK

Wind sensors have always played an irreplaceable role in environmental information monitoring and are expected to operate with lower power consumption to extend service ***,we propose a breeze wake-up anemometer(B-WA)based on a rolling-bearing triboelectric nanogenerator(RB-TENG)with extremely low static *** B-WA consists of two RB-TENGs,a self-waking-up module(SWM),a signal processing module(SPM),and a wireless transmission *** two RB-TENGs are employed for system activation and wind-speed *** the ambient wind-speed exceeds 2 m/s,the wake TENG(W-TENG)and the SWM can wake up the system within 0.96 *** the same time,the SPM starts to calculate the signal frequency from the measured TENG(M-TENG)to monitor the wind speed with a sensitivity of 9.45 Hz/(m/s).After the wind stops,the SWM can switch off the B-WA within 0.52 s to decrease the system energy *** quiescent on-duty mode,the operating power of the B-WA is less than 30 nW,which can greatly extend the service lifetime of the *** integrating triboelectric devices and rolling bearings,this work has realized an ultralow quiescent power and self-waked-up wireless wind-speed monitoring system,which has foreseeable applications in remote weather monitoring,IoT nodes,and so on.

关键词： generator power service