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Constraints on holographic QCD phase transitions from PTA observations

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science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 71-78页

作者： song He Li Li sai Wang shao-Jiang Wang Center for Theoretical Physics and College of Physics Jilin University school of Physical science and Technology Ningbo University Max Planck Institute for Gravitational Physics (Albert Einstein Institute) CAs Key Laboratory of Theoretical Physics Institute of Theoretical Physics Chinese Academy of Sciences school of Fundamental Physics and Mathematical sciences Hangzhou Institute for Advanced StudyUniversity of Chinese Academy of Sciences (UCAS) school of Physical sciences University of Chinese Academy of Sciences (UCAS) Theoretical Physics Division Institute of High Energy Physics Chinese Academy of Sciences

The underlying physics of QCD phase transition in the early Universe remains largely unknown due to its strong-coupling nature during the quark-gluon plasma/hadron gas transition, yet a holographic model has been proposed to quantitatively fit the lattice QCD data while with its duration of the first-order phase transition(FoPT) left undetermined. At specific baryon chemical potential, the first-order QCD phase transition agrees with the observational constraint of baryon asymmetry. It, therefore, provides a scenario for phase transition gravitational waves(GWs) within the standard model of particle physics. If these background GWs could contribute dominantly to the recently claimed common-spectrum red noise from pulsar timing array(PTA) observations, the duration of this FoPT can be well constrained, and the associated primordial black holes are still allowed by current observations.

关键词： pulsar timing array QCD phase transition gravitational waves primordial black holes

silk damping in scalar-induced gravitational waves: a novel probe for new physics

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science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 79-85页

作者： Yan-Heng Yu sai Wang Theoretical Physics Division Institute of High Energy Physics Chinese Academy of Sciences school of Physics University of Chinese Academy of Sciences

silk damping is well known in the study of cosmic microwave background（CMB） and accounts for suppression of the angular power spectrum of CMB on large angular multipoles. In this article, we study the effect of silk damping on the scalar-induced gravitational waves（sIGWs）. Resulting from the dissipation of cosmic fluid, the silk damping notably suppresses the energydensity spectrum of sIGWs on scales comparable to a diffusion scale at the decoupling time of weakly-interacting particles. The effect offers a novel observable for probing the underlying particle interaction, especially for those mediated by heavy gauge bosons beyond the standard model of particles. We anticipate that pulsar timing arrays are sensitive to gauge bosons with mass ～10～3-10～4 GeV, while space-and ground-based interferometers to those with mass ～10～7-1012GeV, leading to essential complements to on-going and future experiments of high-energy physics.

关键词： scalar-induced gravitational waves silk damping new physics

Linear and nonlinear elastic analysis of closely spaced strip foundations using Pasternak model

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Frontiers of structural and Civil Engineering 2017年第2期11卷 228-243页

作者： Priyanka GHOsH s. RAJEsH J. sai CHAND Department of Civil Engineering Indian Institute of Technology Kanpur Kanpur 208016 India

In this study, an attempt is made to determine the interaction effect of two closely spaced strip footings using Pasternak model. The study considers small strain problem and has been performed using linear as well as nonlinear elastic analysis to determine the interaction effect of two nearby strip footings. The hyperbolic stress-strain relationship has been considered for the nonlinear elastic analysis. The linear elastic analysis has been carried out by deriving the equations for the interference effect of the footings in the framework of Pasternak model equation; whereas, the nonlinear elastic analysis has been performed using the finite difference method to solve the second order nonlinear differential equation evolved from Pasternak model with proper boundary conditions. Results obtained from the linear and the nonlinear elastic analysis are presented in terms of non-dimensional interaction factors by varying different parameters like width of the foundation, load on the foundation and the depth of the rigid base. Results are suitably compared with the existing values in the literature.

关键词： bearing capacity linear and non-linear elasticity foundation interaction effect numerical modeling Pastemak model

Kinematic analysis of penile reflexes in a rat model of spinal cord injury

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Asian Journal of Andrology 2021年第1期23卷 30-35页

作者： Casey J steadman sai s Vangoor Charles H Hubscher Department of Anatomical sciences and Neurobiology University of LouisvilleLouisvilleKY 40202USA Kentucky spinal Cord Injury Research Center LouisvilleKY 40202USA.

The ex-copula penile dorsiflexion reflex(PDFR)is an established measure of sexual dysfunction in male rat models of spinal cord *** the PDFR after complete spinal transection is well described,information regarding the more clinically relevant incomplete spinal contusion injury model is *** study examined,using two-dimensional(2D)kinematic analysis,the relationship between the PDFR and degree of white matter sparing(WMs).Male Wistar rats received a T9 contusion with varying degrees of impactor *** kinematic recordings of the PDFR were made 3-8 weeks *** reflex components examined included maximum angle of penile dorsiflexion,total penile event duration,and penile ascent *** hoc comparison between animals grouped based upon injury severity(moderate-severe:13.33%-17.15%WMs vs moderate:20.85%-33.50%WMs)ndicated PDFR ***,the numbers of animals with more moderate contusions having data points above the median n both maximum angle of penile dorsiflexion and penile ascent speed were significantly lower than animals with more severe *** penile event duration was also affected but only at more chronic time points(6-8 weeks).Thus,2D kinematic analysis of the PDFR allows for more consistent and quantifiable analysis of the subtle differences that can occur between injury severity groups in the rat contusion model.

关键词： erection penile sexual dysfunction spinal cord injury

Joint Label-specific Features and Correlation Information for Multi-Label Learning

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Journal of Computer science & Technology 2020年第2期35卷 247-258页

作者： Xiu-Yi Jia sai-sai Zhu Wei-Wei Li school of Computer science and Engineering Nanjing University of Science and TechnologyNanjing 210094China College of Astronautics Nanjing University of Aeronautics and AstronauticsNanjing 210016China

Multi-label learning deals with the problem where each instance is associated with a set of class *** multilabel learning,different labels may have their own inherent characteristics for distinguishing each other,and the correlation information has shown promising strength in improving multi-label *** this study,we propose a novel multilabel learning method by simultaneously taking into account both the learning of label-specific features and the correlation information during the learning ***,we learn a sparse weight parameter vector for each label based on the linear regression model,and the label-specific features can be extracted according to the corresponding weight ***,we constrain label correlations directly on the output of labels,not on the corresponding parameter vectors which conflicts with the label-specific feature ***,for any two related labels,their corresponding models should have similar outputs rather than similar parameter ***,we also exploit the sample correlations through sparse *** experimental results on 12 benchmark datasets show that the proposed method performs better than the existing *** proposed method ranks in the 1st place at 66.7%case and achieves optimal average rank in terms of all evaluation measures.

关键词： multi-label learning label-specific feature sparse reconstruction label correlation sample correlation

Reducing environmental impacts through socioeconomic transitions:critical review and prospects

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Frontiers of Environmental science & Engineering 2023年第2期17卷 123-143页

作者： sai Liang Qiumeng Zhong Key Laboratory for City Cluster Environmental safety and Green Development of the Ministry of Education School of EcologyEnvironment and ResourcesGuangdong University of TechnologyGuangzhou 510006China

Rapid socioeconomic development has caused numerous environmental *** production and consumption activities are the underlying drivers of resource uses,environmental emissions,and associated environmental impacts(e.g.,ecosystem quality and human health).Reducing environmental impacts requires an understanding of the complex interactions between socioeconomic system and environmental *** studies have explored the relationships among human society,economic system,and environmental ***,it is unclear about the research progress in the effects of socioeconomic activities on environmental impacts and the potential directions of future *** critical review finds that existing studies have identified critical regions,sectors,and transmission pathways for resource uses,environmental emissions,and environmental impacts from supply chain ***,scholars have characterized the impacts of socioeconomic transitions on resource uses and environmental ***,existing studies overlook the dynamic nature of the interconnections among human society,economic system,and environmental *** addition,the effects of socioeconomic structural transitions on environmental impacts remain *** review proposes four prospects and possible solutions that will contribute to a better understanding of the complex interactions among human society,economic system,and environmental *** can help identify more effective solutions to reduce environmental impacts through socioeconomic transitions.

关键词： Environmental pressures Environmental impacts Nexus supply chains Trade Coupled systems

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Effects of Risk Perception on Disaster Preparedness Toward Typhoons:An Application of the Extended Theory of Planned Behavior

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International Journal of Disaster Risk science 2022年第1期13卷 100-113页

作者： sai Leung Ng Graduate Institute of Earth science Chinese Culture UniversityTaipei 11114TaiwanChina

This study adopted an extended theory of planned behavior to understand how risk perception affected disaster preparedness *** intercept survey(N=286)was conducted at a typhoon-prone district of Hong Kong,China in 2019,then the data were analyzed using structural equation *** results indicated that risk perception and intention of preparedness were predictors of disaster preparedness *** perception significantly affected intention of preparedness and the effect was partially mediated by subjective *** perception also significantly affected attitude and perceived behavioral control,but attitude and perceived behavioral control were not significantly correlated with intention of *** only may this study supplement the existing literature of disaster preparedness toward typhoons,but also it provides insights for the planning and management of natural hazards and disaster risk reduction in Hong Kong,China.

关键词： Disaster preparedness behaviour Hong Kong,China Risk perception structural equation modelling Theory of planned behaviour Typhoon preparedness

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Evaluating Ignition and Combustion Performance with Al-Metal- Organic Frameworks and Nano-Aluminum in HTPB Fuel

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火炸药学报 2024年第5期47卷 413-421,I0003页

作者： sri Nithya Mahottamananda Yash Pal Yarravarapu sai sriram subha s Djalal Trache Department of Aerospace Engineering B S Abdur Rahman CrescentInstitute of Science and TechnologyChennai-600048India school of Aeronautical science Hindustan Institute of Technologyand ScienceChennai-603103India Energetic Materials Laboratory(EMLab) Teaching and ResearchUnit of Energetic ProcessesEcole Militaire PolytechniqueBP 17Bordj El-Bahri16046AlgiersAlgeria

Incorporating aluminum metal-organic frameworks(Al-MOFs)as energetic additives for solid fuels presents a promising avenue for enhancing combustion *** study explores the potential benefits of Al-MOF(MIL-53(Al))energetic additive on the combustion performance of hydroxyl-terminated polybutadiene(HTPB)*** HTPB-MOF fuel samples were manufactured using the vacuum-casting technique,followed by a comprehensive evaluation of their ignition and combustion properties using an opposed flow burner(OFB)setup utilizing gaseous oxygen as an *** gauge the effectiveness of Al-MOFs as fuel additives,their impact is compared with that of nano-aluminum(nAl),another traditional additive in HTPB *** results indicate that the addition of 15%(mass fraction)nAl into HTPB resulted in the shortest ignition delay time(136 ms),demonstrating improved ignition performance compared to pure HTPB(273 ms).The incorporation of Al-MOF in HTPB also reduced ignition delay times to 227 ms and 189 ms,***,under high oxidizer mass flux conditions(79—81 kg/(m^(2)s)),HTPB fuel with 15%nAl exhibited a substantial 83.2%increase in regression rate compared to the baseline HTPB fuel,highlighting the positive influence of nAl on combustion *** contrast,HTPB-MOF with a 15%Al-MOF additive showed a 32.7%increase in regression rate compared to pure *** results suggest that HTPB-nAl outperforms HTPB-MOF in terms of regression rates,indicating a more vigorous and rapid burning behavior.

关键词： ignition combustion enhancement MOF HTPB regression rate

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Bullous pemphigoid associated with acquired hemophilia A: A case report

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World Journal of Clinical Cases 2025年第4期13卷 28-33页

作者： su-Ye Hu Meng-Can Li Zi-Jia Hao Xu-Ya Chai Pei-sai Li Yang Liu Li-Xia Liu Ying Xu Pan-Pan Yang Ling-E Li Department of Dermatology Shijiazhuang Traditional Chinese Medicine HospitalShijiazhuang 050051Hebei ProvinceChina Graduate school Hebei University of Traditional Chinese MedicineShijiazhuang 050051Hebei ProvinceChina Department of Pathology Shijiazhuang Traditional Chinese Medicine HospitalShijiazhuang 050051Hebei ProvinceChina

BACKGROUND Acquired hemophilia A (AHA) is a rare and potentially severe bleeding disordercaused by circulating autoantibodies against factor Ⅷ (FⅧ). In approximately50% of the patients, the condition is associated with autoimmune diseases,cancers, medication use, pregnancy, and the post-partum period. Bullous pemphigoid(BP) is a chronic autoimmune subepidermal blistering disease associatedwith tissue-bound and circulating autoantibodies against BP antigens 180 (BP180)and 230 (BP230). AHA-associated BP has a high mortality rate;hence, the understandingof this disease must *** sUMMARY A 69-year-old man presented with erythema, blisters, blood blisters, and crustsaccompanied by severe pruritus for more than 20 days, and ecchymosis andswelling on his left upper arm for 3 days. Pathological examination revealed asubepidermal blister that contained eosinophils. Laboratory tests showed that theBP180 autoantibody levels had increased, isolated activated partial thromboplastintime was notably prolonged (115.6 s), and coagulation FⅧ activity wasextremely low (sed (59.2 Bethesda units). Therefore, the patient was diagnosed as having BP associated with AHA, prescribed 0.05% topical halometasone cream, and transferred to a higher-level hospitalfor effective treatment;however, he died after 2 *** AHA associated BP is rare, dangerous, and has a high mortality rate. Therefore, its timely diagnosis and effectivetreatment are necessary.

关键词： Bullous pemphigoid Acquired hemophilia A Acquired hemophilia A FactorⅧ Case report