bluuebunny/crossref_metadata_2025 huggingface dataset:
Neuro-molecular characterization of fish cleaning interactions
Authors: Ramírez-Calero S. , Paula J. R. , Otjacques E. , Rosa R. , Ravasi T. , Schunter C.
Published: May 2022

Coral reef fish exhibit a large variety of behaviours crucial for fitness and survival. The cleaner wrasseLabroides dimidiatusdisplays cognitive abilities during interspecific interactions by providing services of ectoparasite cleaning, thus serving as a good example to understand the processes of complex social behaviour. However, little is known about the molecular underpinnings of cooperative behaviour betweenL. dimidiatusand a potential client fish (Acanthurus leucosternon). Therefore, we investigated the molecular mechanisms in three regions of the brain (Fore-, Mid-, and Hindbrain) during the interaction of these fishes. Here we show, using transcriptomics, that most of the transcriptional response in both species was regulated in the Hindbrain and Forebrain regions and that the interacting behaviour responses ofL. dimidiatusinvolved immediate early gene alteration, dopaminergic and glutamatergic pathways, the expression of neurohormones (such as isotocin) and steroids (e.g. progesterone and estrogen). In contrast, in the client, fewer molecular alterations were found, mostly involving pituitary hormone responses. The particular pathways found suggested synaptic plasticity, learning and memory processes in the cleaner wrasse, while the client indicated stress relief.
Combined treatment of graft versus host disease using donor regulatory T cells and ruxolitinib
Authors: Rodríguez-Gil Alfonso , Escamilla-Gómez Virginia , Nufer Melanie , Andújar-Sánchez Félix , Lopes-Ramos Teresa , Bejarano-García José Antonio , García-Guerrero Estefanía , Calderón-Cabrera Cristina , Caballero-Velázquez Teresa , García-Calderón Clara Beatriz , Hernández-Díaz Paola , Reguera-Ortega Juan Luis , Rodríguez-Torres Nancy , Martínez-Cibrián Nuria , Rodríguez-Barbosa José Ignacio , Villadiego Javier , Pérez-Simón José Antonio
Published: May 2022

Donor derived regulatory T lymphocytes and the JAK1/2 kinase inhibitor ruxolitinib are currently being evaluated as therapeutic options in the treatment of chronic graft versus host disease (cGvHD). In this work, we aimed to determine if the combined use of both agents can exert a synergistic effect in the treatment of GvHD. For this purpose, we studied the effect of this combination both in vitro and in a GvHD mouse model. Our results show that ruxolitinib favors the ratio of thymic regulatory T cells to conventional T cells in culture, without affecting the suppressive capacity of these Treg. The combination of ruxolitinib with Treg showed a higher efficacy as compared to each single treatment alone in our GvHD mouse model in terms of GvHD incidence, severity and survival without hampering graft versus leukemia effect. This beneficial effect correlated with the detection in the bone marrow of recipient mice of the infused donor allogeneic Treg after the adoptive transfer.
Mental health and social isolation under repeated mild lockdowns in Japan
Authors: Yamamoto Tetsuya , Uchiumi Chigusa , Suzuki Naho , Sugaya Nagisa , Murillo-Rodriguez Eric , Machado Sérgio , Imperatori Claudio , Budde Henning
Published: May 2022

The influence of repeated lockdowns on mental health and social isolation is unknown. We conducted a longitudinal study of the influence of repeated mild lockdowns during two emergency declarations in Japan, in May 2020 and February 2021. The analyses included 7893 people who participated in all online surveys. During repeated mild lockdowns, mental and physical symptoms decreased overall, while loneliness increased and social networks decreased. Subgroup analyses revealed that depression and suicidal ideation did not decrease only in the younger age group (aged 18–29 years) and that younger and middle-aged people (aged 18–49 years), women, people with a history of treatment for mental illness, and people who were socially disadvantaged in terms of income had higher levels of mental and physical symptoms at all survey times. Additionally, comprehensive extraction of the interaction structure between depression, demographic attributes, and psychosocial variables indicated that loneliness and social networks were most closely associated with depression. These results indicate that repeated lockdowns have cumulative negative effects on social isolation and loneliness and that susceptible populations, such as young people and those with high levels of loneliness, require special consideration during repeated lockdown situations.
Cataract surgery in patients with Fuchs’ dystrophy and corneal decompensation indicated for Descemet's membrane endothelial keratoplasty
Authors: Chou Wei-Yi , Kuo Yih-Shiuan , Lin Pei-Yu
Published: May 2022

The availability of corneal donor tissue is limited in most developing countries. This study evaluated whether patients with coexisting cataract and Fuchs’ dystrophy with corneal decompensation awaiting Descemet’s membrane endothelial keratoplasty (DMEK) benefited from phacoemulsification. This is a retrospective case–control study which included patients with Fuchs’ dystrophy and evidence of corneal decompensation awaiting DMEK. Best-corrected visual acuity (BCVA) and central corneal thickness (CCT) were documented at baseline (pre-cataract surgery in the case group, or at the time of transplantation registry in the control group), 1-month and pre-DMEK. A total of 16 phakic patients with visually significant cataracts had cataract surgery during the study period, and 15 pseudophakic patients were included as controls. There was no significant difference with regard to BCVA at baseline, 1-month or pre-DMEK between the case and control groups. Similarly, no significant difference in CCT was found at baseline, 1-month or pre-DMEK. In the case group, 4 patients with improved visual acuity post-cataract surgery chose to defer DMEK. After stratification, statistical analysis showed significantly better BCVA in the deferred group (n = 4) at 1-month post-cataract surgery, compared to the DMEK group (n = 12) (0.21 ± 0.21 vs. 0.86 ± 0.29 LogMAR, P = 0.004). The other parameters, including baseline BCVA and CCT at any time point documented, were not statistically different. In conclusion, in patients with Fuchs’ dystrophy and decompensated corneas awaiting transplantation, phacoemulsification did not lead to significant increase of corneal thickness nor deterioration of visual acuity. A few patients achieved satisfactory vision after cataract surgery and deferred endothelial keratoplasty.
SARS-CoV-2 delta variant infection in domestic dogs and cats, Thailand
Authors: Jairak Waleemas , Chamsai Ekkapat , Udom Kitikhun , Charoenkul Kamonpan , Chaiyawong Supassama , Techakriengkrai Navapon , Tangwangvivat Ratanaporn , Suwannakarn Kamol , Amonsin Alongkorn
Published: May 2022

In June–September 2021, we investigated severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) infections in domestic dogs and cats (n = 225) in Bangkok and the vicinities, Thailand. SARS-CoV-2 was detected in a dog and a cat from COVID-19 positive households. Whole genome sequence analysis identified SARS-CoV-2 delta variant of concern (B.1.617.2). Phylogenetic analysis showed that SARS-CoV-2 isolated from dog and cat were grouped into sublineage AY.30 and AY.85, respectively. Antibodies against SARS-CoV-2 could be detected in both dog (day 9) and cat (day 14) after viral RNA detection. This study raises awareness on spill-over of variant of concern in domestic animals due to human-animal interface. Thus, surveillance of SARS-CoV-2 in domestic pets should be routinely conducted.
New generation of highly sensitive radon detectors based on activated carbon with compensated temperature dependence
Authors: Pressyanov Dobromir
Published: May 2022

Recently patented compensation module for sensors of radioactive noble gases paves the way for novel designs of radon detectors/monitors with adsorbents, suitable for long-term measurements. The module compensates the strong influence of the temperature on the response of detectors with activated carbon or other ad/absorbents. This report describes radon detectors in which activated carbon fabric is coupled with a solid state nuclear track detector and placed in a compensation module. The module is a hermetic volume made of polyethylene foil, through which the radon diffuses. Two reciprocal trends make possible the temperature compensation: that of the radon penetration through the walls, which increases with the increase of the temperature, and that of the adsorption, which decreases. The results show that outside the module the variation of the detector response over the range of 5–35 °C is 230–305%. In contrast, inside the module the variation is reduced to 6–17%. The module also protects the sensor from humidity and thoron, keeping its sensitivity to radon 7–9 times higher than that of commonly used radon detectors. This makes the new detectors very useful for measurement of low radon concentrations in the atmosphere.
Frontal cortical activation during emotional and non-emotional verbal fluency tests
Authors: Yeung Michael K.
Published: May 2022

There has been growing recognition of the utility of combining the verbal fluency test and functional near-infrared spectroscopy (fNIRS) to assess brain functioning and to screen for psychiatric disorders. Recently, an emotional analogue of the semantic fluency test (SFT) has been developed that taps partly different processes from conventional verbal fluency tests. Nevertheless, neural processing during the emotional SFT remains elusive. Here, fNIRS was used to compare frontal cortical activation during emotional and non-emotional SFTs. The goal was to determine whether the emotional SFT activated overlapping yet distinct frontal cortical regions compared with the conventional, non-emotional SFT. Forty-three healthy young adults performed the emotional and non-emotional SFTs while hemodynamic changes in the bilateral frontopolar, dorsomedial, dorsolateral, ventrolateral, and posterolateral frontal cortices were measured by fNIRS. There were significant increases in oxyhemoglobin concentration and significant decreases in deoxyhemoglobin concentration (i.e., activation) in frontopolar, dorsolateral, and ventrolateral frontal regions during both the non-emotional and emotional SFTs. Also, complementary analyses conducted on changes in the two chromophores using classical and Bayesian hypothesis testing suggested that comparable frontal cortical regions were activated while performing the two tests. This similarity in activation occurred in a context where non-emotional and emotional SFT performances exhibited differential relationships with the overall level of negative mood symptoms. In conclusion, frontal cortical activation during the emotional SFT is similar to that during the conventional, non-emotional SFT. Given that there is evidence for discriminant validity for the emotional SFT, the neural mechanisms underlying the uniqueness of this test warrant further investigation.
Detection of cognitive decline by spinal posture assessment in health exams of the general older population
Authors: Nishimura Hikaru , Ikegami Shota , Uehara Masashi , Takahashi Jun , Tokida Ryosuke , Kato Hiroyuki
Published: May 2022

The recent increase in the older adult population has led to a higher prevalence of cognitive impairment, which is often overlooked in routine health examinations. Citizens aged 50–89 years were targeted for this cohort survey by random sampling from the resident registry of a cooperating town in 2014. A total of 411 participants (202 male and 209 female) were enrolled. We analyzed the distribution of cognitive function test scores as determined by Montreal Cognitive Assessment and Mini-Mental State Examination tests in each age (50’s, 60’s, 70’s and 80’s) and sex group to examine whether cognitive decline could be detected by sagittal spinal balance measurement based on a radiological approach. Sagittal spinal balance was quantitatively measured as sagittal vertical axis (SVA). We observed significant associations for higher age and/or SVA anteriorization with lower cognitive function. In males, spinal balance anteriorization was associated with cognitive decline independently of age, with combinations of age and SVA also making valid cognitive decline determinations; male cases of SVA ≥ 100 mm at any age, SVA ≥ 90 mm at ≥ 70 years, and SVA ≥ 70 mm at ≥ 80 years were all more likely to have cognitive decline than cases below those values. For females, cognitive decline was more likely in cases of SVA ≥ 70 mm, regardless of age. Thus, spinal balance anteriorization can be regarded as an easily visible indicator of latent cognitive decline in community-dwelling older people.
Distribution of Al, Fe, Si, and DOC between size fractions mobilised from topsoil horizons with progressing degree of podzolisation
Authors: Krettek Agnes , Stein Mathias , Rennert Thilo
Published: May 2022

Aluminium, Fe, Si, and dissolved organic C (DOC) accumulate in the subsoil of Podzols after mobilisation in the topsoil. We conducted laboratory experiments with topsoil horizons with progressing degree of podzolisation by irrigation with artificial rainwater at varying intensity and permanence. We monitored the concentrations and distribution of mobilised Al, Fe, Si, and DOC between size fractions (< 1000 Dalton, 1 kDa– < 0.45 µm, and > 0.45 µm). Total eluate concentrations were increased at the onset of the experiments and after the first irrigation interruption, indicating non-equilibrium release. There was no statistical effect of the degree of podzolisation on element concentrations. Release of Al, Fe, and DOC was mostly dominant in the fraction 1 kDa– < 0.45 µm, indicating metals complexed by larger organic molecules and colloids. Silicon released was dominantly monomeric silicic acid < 1 kDa. Particularly with the least podzolised soils, Al and Si concentrations < 1 kDa might have been controlled by short-range ordered aluminosilicates, while their transport in colloidal form was unlikely. Our study pointed to both quantitative and qualitative seasonality of element release during podzolisation, to decoupling of Al and Si release regarding size, and to different minerals that control element release as a function of the degree of podzolisation.
Analysis of smooth pursuit eye movements in a clinical context by tracking the target and eyes
Authors: Hirota Masakazu , Kato Kanako , Fukushima Megumi , Ikeda Yuka , Hayashi Takao , Mizota Atsushi
Published: May 2022

In the evaluation of smooth pursuit eye movements (SPEMs), recording the stimulus onset time is mandatory. In the laboratory, the stimulus onset time is recorded by electrical signal or programming, and video-oculography (VOG) and the visual stimulus are synchronized. Nevertheless, because the examiner must manually move the fixation target, recording the stimulus onset time is challenging in daily clinical practice. Thus, this study aimed to develop an algorithm for evaluating SPEMs while testing the nine-direction eye movements without recording the stimulus onset time using VOG and deep learning–based object detection (single-shot multibox detector), which can predict the location and types of objects in a single image. The algorithm of peak fitting–based detection correctly classified the directions of target orientation and calculated the latencies and gains within the normal range while testing the nine-direction eye movements in healthy individuals. These findings suggest that the algorithm of peak fitting–based detection has sufficient accuracy for the automatic evaluation of SPEM in clinical settings.
Human M1 macrophages express unique innate immune response genes after mycobacterial infection to defend against tuberculosis
Authors: Khan Arshad , Zhang Kangling , Singh Vipul K. , Mishra Abhishek , Kachroo Priyanka , Bing Tian , Won Jong Hak , Mani Arunmani , Papanna Ramesha , Mann Lovepreet K. , Ledezma-Campos Eder , Aguillon-Duran Genesis , Canaday David H. , David Sunil A. , Restrepo Blanca I. , Viet Nhung Nguyen , Phan Ha , Graviss Edward A. , Musser James M. , Kaushal Deepak , Gauduin Marie Claire , Jagannath Chinnaswamy
Published: May 2022

Mycobacterium tuberculosis (Mtb) is responsible for approximately 1.5 million deaths each year. Though 10% of patients develop tuberculosis (TB) after infection, 90% of these infections are latent. Further, mice are nearly uniformly susceptible to Mtb but their M1-polarized macrophages (M1-MΦs) can inhibit Mtb in vitro, suggesting that M1-MΦs may be able to regulate anti-TB immunity. We sought to determine whether human MΦ heterogeneity contributes to TB immunity. Here we show that IFN-γ-programmed M1-MΦs degrade Mtb through increased expression of innate immunity regulatory genes (Inregs). In contrast, IL-4-programmed M2-polarized MΦs (M2-MΦs) are permissive for Mtb proliferation and exhibit reduced Inregs expression. M1-MΦs and M2-MΦs express pro- and anti-inflammatory cytokine-chemokines, respectively, and M1-MΦs show nitric oxide and autophagy-dependent degradation of Mtb, leading to increased antigen presentation to T cells through an ATG-RAB7-cathepsin pathway. Despite Mtb infection, M1-MΦs show increased histone acetylation at the ATG5 promoter and pro-autophagy phenotypes, while increased histone deacetylases lead to decreased autophagy in M2-MΦs. Finally, Mtb-infected neonatal macaques express human Inregs in their lymph nodes and macrophages, suggesting that M1 and M2 phenotypes can mediate immunity to TB in both humans and macaques. We conclude that human MФ subsets show unique patterns of gene expression that enable differential control of TB after infection. These genes could serve as targets for diagnosis and immunotherapy of TB.
Acute lymphoblastic leukemia displays a distinct highly methylated genome
Authors: Hetzel Sara , Mattei Alexandra L. , Kretzmer Helene , Qu Chunxu , Chen Xiang , Fan Yiping , Wu Gang , Roberts Kathryn G. , Luger Selina , Litzow Mark , Rowe Jacob , Paietta Elisabeth , Stock Wendy , Mardis Elaine R. , Wilson Richard K. , Downing James R. , Mullighan Charles G. , Meissner Alexander
Published: May 2022

DNA methylation is tightly regulated during development and is stably maintained in healthy cells. In contrast, cancer cells are commonly characterized by a global loss of DNA methylation co-occurring with CpG island hypermethylation. In acute lymphoblastic leukemia (ALL), the commonest childhood cancer, perturbations of CpG methylation have been reported to be associated with genetic disease subtype and outcome, but data from large cohorts at a genome-wide scale are lacking. Here, we performed whole-genome bisulfite sequencing across ALL subtypes, leukemia cell lines and healthy hematopoietic cells, and show that unlike most cancers, ALL samples exhibit CpG island hypermethylation but minimal global loss of methylation. This was most pronounced in T cell ALL and accompanied by an exceptionally broad range of hypermethylation of CpG islands between patients, which is influenced by TET2 and DNMT3B. These findings demonstrate that ALL is characterized by an unusually highly methylated genome and provide further insights into the non-canonical regulation of methylation in cancer.
Heterogeneous UV disinfection aided by ZnO/Al2O3 composites for inhibiting antibiotic resistant bacteria photoreactivation and gene recovery
Authors: Wang Xu , Zhang Baiyu , Ren Hua , Jia Yibin , Xia Honghuan , Guo Ping
Published: May 2022

Photoreactivation has limited antibiotic resistant bacteria (ARB) and gene (ARG) reduction by ultraviolet (UV) heterogeneous disinfection.
Synthesis of poly(9,9-dioctylfluorene) in a rotating packed bed with enhanced performance for polymer light-emitting diodes
Authors: Zou Yuanzuo , Wang Dan , Guo Jingzhou , Yang Junwei , Pu Yuan , Chen Jian-Feng
Published: May 2022

The Suzuki polymerization of heterogeneous systems was strengthened in a rotating packed bed via a high-gravity technique. As a result, poly(9,9-dioctylfluorene) with low polydispersity was efficiently and conveniently obtained.
The formation mechanism of fibrous metal oxalate prepared by ammonia coordination method
Authors: Ma Huan , Liu Zhiyong , Liu Zhihong
Published: May 2022

Ammonia coordination method was proposed to synthesize fibrous metal oxalates and its mechanism was studied.
In situ lattice tuning of quasi-single-crystal surfaces for continuous electrochemical modulation
Authors: Zeng Biao-Feng , Wei Jun-Ying , Zhang Xia-Guang , Liang Qing-Man , Hu Shu , Wang Gan , Lei Zhi-Chao , Zhao Shi-Qiang , Zhang He-Wei , Shi Jia , Hong Wenjing , Tian Zhong-Qun , Yang Yang
Published: May 2022

We reported a new method capable of adjusting the lattice structure of solid surfaces with sub-angstrom precision and achieved in situ and continuous control over electrochemical activity.
Orbital analysis of bonding in diarylhalonium salts and relevance to periodic trends in structure and reactivity
Authors: Karandikar Shubhendu S. , Bhattacharjee Avik , Metze Bryan E. , Javaly Nicole , Valente Edward J. , McCormick Theresa M. , Stuart David R.
Published: May 2022

A revised bonding model for diarylhalonium salts, that involves partial s-orbital contribution, provides new insight into periodic trends in structure and reactivity.
Advances in integrated digital microfluidic platforms for point-of-care diagnosis: a review
Authors: Zhang Yuqian , Liu Yuguang
Published: May 2022

This work highlights recent advancements in the integration of analytical tools into DMF devices, and discusses the current challenges and potential solutions as well as future outlooks for an automated, integrative platform for POC applications.
Rendering bounded error in adaptive robust path tracking control for autonomous vehicles
Authors: Hu Ziniu , Yu Ziyun , Yang Zeyu , Hu Zhanyi , Bian Yougang
Published: May 2022

For the sake of safety, the vehicle path tracking control should not only ensure the stability of the path tracking error containing the lateral offset and the orientation error but also guarantee that both the transient and steady states of the lateral offset are within a specified safe boundary. However, the time‐varying uncertainties of a vehicle system make the control design a tough task. This paper develops an adaptive robust control (ARC) which guarantees both the tracking stability and the bounded error property for autonomous vehicles. First, to handle the bounded error requirement, a barrier function based state transformation which converts the constrained lateral offset into an unconstrained state is proposed. Then, the path tracking control task is cast into an equality constraint of the system state. On this basis, a novel adaptive robust constraint‐following controller is developed to make the transformed system follow the proposed equality constraint. Through Lyapunov minimax analysis, it is proved that the resulting control guarantees the approximate constraint‐following performance and the bounded error property despite the presence of system uncertainties. Finally, the main theoretical results are verified through CarSim‐Simulink co‐simulation results.
Deceptive signal generating optimization based on frequency diverse array
Authors: Ge Jiaang , Xie Junwei , Chen Chushu
Published: May 2022

The direction and position of the radar signals are essential information in the radar countermeasure, and with the development of the reconnaissance system, the radar is facing more severe threats. However, the high‐gain beam and even‐distribute phase of the phased‐array radar restrict the further development of radar protection measures. Therefore, considering the angle‐range‐time‐coupled beam and phase of the frequency diverse array (FDA), we proposed a deceptive signal generating method based on the FDA. Firstly, the amplitude‐ and phase‐based reconnaissance countermeasures were established, respectively. Moreover, the regulation ability of the frequency increment sequence was studied. Therefore, by finding the appreciated frequency increment sequence that can regulate the FDA signals, the proposed FDA can generate deceptive signals that counter both the amplitude‐ and phase‐based reconnaissance system. The instantaneous signal‐to‐noise ratio and Cramér–Rao lower bound were considered to verify the method. Numerical examples and simulations showed that the proposed countermeasure could generate deceptive signals with good error tolerance, whether in a noisy or non‐noise environment.
Feature recognition of state signal of electromechanical integration railway turnout over health parameters using CMOS area array technology
Authors: Zhou Yushuang , Sharma Ashutosh , Shabaz Mohammad
Published: May 2022

Railway turnout is the most important line connection equipment of high‐speed railway system. In order to improve the monitoring and maintenance of high‐speed railway turnout gap, we avoid the large impact of train operations on the turnout. With the increase of train speed, the impact of train operation on turnout is increasing. Therefore, the requirements for monitoring, maintenance, and adjustment of high‐speed railway turnout gap are also gradually improved. In this paper, the feature recognition research of mechatronic railway turnout state signal based on CMOS area array technology is proposed. First, it introduces the collection of turnout health parameters, the collection and processing of gap data in turnout based on CMOS, and the image feature recognition algorithm of adaptive threshold. The problem of inconvenient collecting the bifurcation image showing the gap is solved, and the pollution affects the accuracy. The experimental results show that, according to the fault mechanism of turnout system, turnout faults are mainly divided into electrical faults and mechanical faults. On‐site maintenance: the records show that the mechanical failure accounts for more than 90% of turnout failures. Fault category is the database of fault diagnosis model training. According to the structural principle and fault record description of turnout, there are 12 categories of turnout faults. The feature recognition of mechatronic railway turnout state signal based on CMOS area array technology proposed in this paper has certain validity and accuracy.
Boundary clarifying between integration and validation testing and engineering example
Authors: Tanli Mengqing , Zhang Ying , Wang Yulin , Jiang Yan
Published: May 2022

Partitioning of testing phases is a basic problem, and for clarifying the boundary between integration and validation testing, this paper discusses this issue from basic technological boundary and management and control aspect. Meanwhile, discussion about test certificate for validation testing is proposed for suggestion and reference. Without loss of applicability, an engineering application example is given, and how to construct test case respectively for integration testing and validation testing is briefly summarized according to engineering requirement.
Bayesian network variable elimination method optimal elimination order construction
Authors: Ren Dongping , Guo Jianxi , Hao Xiaoli
Published: May 2022

Variable Elimination (VE) is the most basic one of many Bayesian network inference algorithms. The speed and complexity of reasoning mainly depend on the order of elimination. Finding the optimal elimination order is a Nondeterministic Polynomial Hard (NP-Hard) problem, which is often solved by heuristic search in practice. In order to improve the speed of reasoning of the variable elimination method, the minimum, maximum potential, minimum missing edge and minimum added complexity search methods are studied. The Asian network is taken as an example to analyze and calculate the complexity and elimination of the above search method. Meta-order, through MATLAB R2018a, the above different search methods were constructed and reasoned separately. Finally, the performance of the four search methods was compared by inference time analysis. The experimental results show that the minimum increase complexity search method is better than other search methods, and the average time consuming is at least 0.012s, which can speed up the reasoning process of Bayesian network.
Angle steel tower bolt defect detection based on YOLO-V3
Authors: Zhang Jingfeng , Hu Yuanwei , Ji Shujun
Published: May 2022

The bolts in the angle steel tower are seriously affected by corrosion and loss. This paper proposes a novel detection system based on YOLO-V3 to avoid the danger of traditional manual detection method for the bolt fault detection of the angle steel tower. A multi-scale convolution module is used to replace the ordinary convolution of original YOLO-V3 so as to obtain the spatial characteristics information of different scales in the image, and enhance the detection accuracy. The experimental results show that mAP of the proposed YOLO-SKIP network is 0.91. Our YOLO-SKIP model has achieved the best detection performance on the defective angle steel tower bolt data.
The method of comprehensive optimization analysis for catamaran unmanned vehicle
Authors: Ding Wei , Li Shuai , Zhang Jincheng , Yang Songlin , Luo Guangen
Published: May 2022

In order to obtain the optimal design of catamaran unmanned vehicle type, based on a USV type, and a mathematical model is created. Use the form of the product of the power exponential function for each performance objective function, and then combine the penalty function to construct the fitness function suitable for the catamaran unmanned, combine the constructed optimization mathematical model with the intelligent optimization algorithm, and design the comprehensive optimization program for the vehicle type. Based on the above software platform, the research and analysis of genetic algorithm, particle swarm algorithm and chaos algorithm are conducted. The results show that the highest efficiency of selected catamaran ship model; further analysis of the four ship types M08, M10, M15, M16in the two different high-speed sections of the optimal ship type, and finally get the M10 optimal, so as to optimize the design.
Analysis of polarization characteristics of freeform surface optical system
Authors: Zhang Yilan , Shi Haodong , Jiang Huilin
Published: May 2022

Freeform surfaces are widely used in off-axis optical systems with large aperture, large field of view, and long focal length. The polarization effect caused by the non-rotationally symmetrical shape has an impact on the system’s polarization imaging quality and measurement accuracy. Based on Jones’ notation, this paper proposes a polarization aberration analysis method for fringed Zernike polynomial freeform optical systems and constructs a full-field polarisation aberration analysis model of non-rotationally symmetric freeform reflective optical systems. The light propagation vector k is added on the basis of the two-dimensional ray tracing algorithm. By tracing the full-field polarized light of the off-axis optical system in the field of view, the Jones pupil diagram is obtained. The phase aberration, diattenuation and retardance are separated by Pauli decomposition and SVD decomposition. The off-axis freeform surface optical system is designed. The analysis results show that the phase aberration of the off-axis freeform surface optical system is directly related to the surface shape of the freeform surface. The changes of the freeform surface to the diattenuation and retardance are both 56% of the diattenuation and retardance of the sistem. For deep-space telescopes and lithography systems, it is of great significance for improving system accuracy to master this change.
Stability analysis of a viscous continuous traffic flow model
Authors: Ai Wenhuan , Li Na , Tian Ruihong
Published: May 2022

This paper studies the stability of a speed gradient continuous traffic flow model, which is proposed by Ge et al and based on TVDM. The nonlinear and linear systems of traveling wave solutions of the model equation are derived by traveling wave substitution. And the types of equilibrium points and it’s stability are analyzed theoretically. Finally, the phase plane diagram is obtained through simulation, and the global distribution structure of the trajectories is analyzed. The results show that the numerical results are consistent with the theoretical analysis, so some nonlinear traffic phenomena can be analyzed and predicted from the perspective of global stability.
Equilibrium Point analysis of macro traffic flow model considering the influence of front and rear lights
Authors: Zhang Ting , Ai Wenhuan , Liu Dawei
Published: May 2022

In this paper, the traveling wave solution of the macro continuum model considering the automobile tail lamp effect is obtained by using the phase plane analysis method, the type of equilibrium point of the model is determined, and the stability of the system at the equilibrium point is analyzed. This method can describe and predict the nonlinear traffic phenomena on Expressway from the perspective of system global stability. According to the theory of differential equation, the model is further analyzed to judge the type and stability of equilibrium point. Finally, the simulation diagram is used for numerical simulation. Through numerical verification, it is concluded that the numerical results are consistent with the theoretical analysis.
A lending scheme based on smart contract for banks
Authors: Zhu Fujian , Zhang Chunhai
Published: May 2022

In this paper, we work towards bank loans. This task is nontrivial due to the following problem: small enterprises and individuals have difficulties in lending, banks bear high risks, and the lending business is greatly affected by the subjective influence of staff. Towards this end, we propose a novel loan investment model and smart contract algorithm. Afterwords, we build an intelligent risk control evaluation algorithm based on deep learning. To justify our work, we implemented a distributed application that can run safely. In addition, using the data set of paipai loan, the accuracy of our intelligent risk control evaluation algorithm is 94.33%.
Research on the benefits of digital enabled agricultural products circulation
Authors: Wu Peiqi
Published: May 2022

Taking digital portraits to empower new consumption of agricultural products as the research theme, this paper studies the digital label information in the whole life cycle of digitally empowered agricultural products from breeding to terminal sales. At the same time, this paper introduces the game theory model to discuss the dynamic game process among agricultural producers, distributors and consumers in the context of the circulation of agricultural products empowered by digital portraits under the condition of relatively complete digital information, using economic bargaining model to deduce and calculate the economic benefits brought by the figures to the circulation of agricultural products.
Research on liquidity risk of commercial bank – from the view of comparison of Chinese and American commercial banks
Authors: Wang Mingming
Published: May 2022

The liquidity risk of commercial banks has become an important driver of the major risks in the modern economic system. This paper synthesizes the off balance sheet items which are often ignored in traditional bank liquidity researches, and uses the method of tracking and comparative analysis in different window periods to explore the liquidity changes and possible risks of Chinese commercial banks before, during and after the financial crisis. It is found that traditional loan projects, committed loan projects and demand deposits are important drivers of liquidity risk; Although the liquidity level of China’s banks is high, due to the high demand deposit rate, low core capital ratio, rapid loan growth and high non-performing rate, and the lack of risk prevention awareness, liquidity risk is still a major risk that China’s commercial banks need to face.
Research on Ideological and political construction of introduction to e-commerce under the concept of “Building Morality and cultivating people”
Authors: Liu Li
Published: May 2022

Taking “Building Morality and cultivating people” as the central idea, this paper studies the excavation of Ideological and political elements, teaching methods and teaching evaluation system, and discusses the construction scheme of Ideological and political education in the course of introduction to e-commerce. Pay attention to the timeliness and novelty of Ideological and political cases, cultivate students’ professionalism, family and country feelings and political responsibility, and form a correct outlook on life, values and world outlook.
Research on practical teaching cultivation model of urban and rural planning major in local universities based on space construction
Authors: Liu Weiyi , Yang Juan , Wu Changyou
Published: May 2022

Practical teaching is an important part of the professional education of urban and rural planning and an effective way to cultivate students’ innovative and practical ability. However, the urban and rural planning professional education training model is facing various challenges under the background of the new development concept, and it is urgent to adjust and optimize. Aiming at the main problems existing in the current practical teaching of urban and rural planning in local colleges and universities, this paper proposes a content framework for practical teaching based on regional urban and rural space construction, including: vernacular architecture understanding, spatial perception, spatial surveying and mapping, model construction, space construction, urban simulation, scenario simulation, comprehensive practice, etc. The paper also discusses the personnel training mode and practical application approach of the practical teaching of urban and rural planning specialty which is oriented to the local areas and rooted at the grassroots level.
Does state-owned capital matter for private enterprise: a research based on trade credit
Authors: Wu Zuguang , Deng Yuting
Published: May 2022

The introduction of state-owned capital into private enterprises is an important form of mixed-ownership reform, but it is often labeled as ‘state advancement and private retreat’ or ‘retrogression in reform’ in China. Based on the sample of listed private manufacturers, we find the introduction of state-owned capital can significantly improve trade credit of private enterprises. Due to the complementary advantages, private enterprises benefit from state-owned capital by getting more trade credit. Moreover, we find there will be a profound impact only in the regions with high degrees of marketization. An important policy implication is that we should continue to promote market-oriented reforms and focus on encouraging state-owned capital to enter private enterprises in high marketization regions.
Research progress on growth curve fitting analysis of goose
Authors: Li Qingqing , Li Momo , Guo Aiwei , Wang Qilin , Liu Lili , Chen Fenfen , Duan Yanqing
Published: May 2022

Based on the mathematical description and biological parameters of three nonlinear growth models (Logistic, Gompertz, Bertalanffy), the recent advance of growth curve fitting analysis in goose have been reviewed briefly in this paper in order to provide some basic information for future goose research and breeding work.
Research on anti-jamming beamforming with multi-UAV relays
Authors: Cheng Ruixia , Tian Yu , Zhu Junwen , Zhang Yiwen
Published: May 2022

As the common means of field emergency communication, the unmanned aerial vehicle (UAV) relay plays an important role in both civil and military fields. With the diversification of requirements and the limitations of single operation, multi-UAV cooperative work has attracted extensive attention. However, due to the UAV signal’s universality of broadcast and the limitation of power, information transmission is more likely to be interrupted. Therefore, in the presence of interference, this paper adopts forward amplification protocol under UAV relay transmission model. And two beamforming methods are proposed based on minimizing transmission power and maximizing communication rate of UAV relays. Then, we establish the power-constrained maximum security rate optimization problem with UAV relays, and deduce the corresponding beamforming weight vector and the optimal rate of safety. Finally, the simulation results show the effectiveness and accuracy of the proposed beamforming method.
Image encryption using improved Cubic map and Henon map
Authors: Xu Yaoqun , Zhen Xinxin
Published: May 2022

In this paper, constructing the improved chaotic map which multiplies the output value of the chaotic map by a large value, and subtracts its integer part. Simulation results show that the chaos range of the improved chaotic map is enlarged. The generated chaotic sequence has strong randomness. A double chaotic image encryption algorithm is proposed by combining the improved chaotic maps with the permutation and diffusion encryption structure. The algorithm can reduce the complexity while ensuring the encryption effect. The simulation results show that the encryption algorithm can resist statistical attack and has excellent robustness, and has a good development prospect in information security.
Research on rock triaxial cyclic loading and unloading characteristics based on PFC3D
Authors: Qi Ziyuan , Xiao Jiancheng , Lu Jingjing , Zhou Hui , Wang Huaguo
Published: May 2022

Numerical methods provide a new way for solving complex geotechnical engineering problems. Firstly, we review the emergence and development of numerical methods, and introduce the basic principles of particle flow discrete element and its application in geotechnical engineering. After that, a method of servo combination of cylinder and loading plate is used, the numerical simulation of the three-dimensional rock in triaxial loading and unloading test is carried out by PFC3D software, and the loading and unloading mechanical characteristics of rock mass under the linear elastic contact constitutive model and parallel bonded contact constitutive model are studied respectively, and we obtain the triaxial loading and unloading stressstrain curves of rock under the elastic constitutive model and elastoplastic constitutive model. The residual strains and hysteresis phenomena of the rock under the two constitutive models are analysed, and the feasibility of the particle flow discrete element method in studying the mechanical characteristics of rocks is demonstrated.
Exploration on mechanical test method of improved loess under dry-wet cycles
Authors: Zhao Laishuan , Wu Tiehai , Yu Shijie , Rong Baogui
Published: May 2022

The stability of loess subgrade is affected by many factors. Dry-wet cycle is a common factor that causes damage to the strength of loess subgrade. In order to study the influence of dry-wet cycle on the stability of loess subgrade, reveal the mechanism of dry-wet cycle damage to the strength of loess subgrade It is necessary to sample the loess soil samples in this area, and perform compaction test, dry-wet cycle test, unconfined compression test and scanning electron microscope test on the soil sample to analyze the influence of dry-wet cycle on the strength and microstructure of loess soil. . In this way, the potential relationship between the microstructure and the strength of the soil can be obtained. The results show that the loess drywet cycle causes the loess's tensile strength and compressive strength to decrease with the increase of the number of dry-wet cycles. The dry-wet cycle effect gradually reduces the shear structural strength of the undisturbed loess and eventually disappears. Scanning electron microscope tests found that the humidification process caused slight movement of the particles, while the drying process resulted in permanent deformation of small pores.
In Situ Preparation of Thermotropic Liquid Crystalline Polyester and Nylon 10T
Authors: Rong Ze , Chen Shiyu , Xu Hanwen , Yang Xiaoping , Wang Haojing , Li Yuanzhe
Published: May 2022

Poly-decamethylene terephthalamide (PA10T) is one of high temperature special engineering plastics, which is widely used in aviation automobile, and electronic industries. However, its bad processability, poor crystallinity, and toughness may affect its further applications. In this work, the melting polycondensation synthesis of thermotropic liquid crystalline polyester (TLCP) prepolymer was explored. This synthesized TLCP was then added into PA10T via in-situ compounding, to obtain the polydecamethylene terephthalamide / thermotropic liquid crystalline polyester composites (TLCP/PA10T). The TLCP was found easy to be oriented, which can reduce the entanglement of PA10T and improve the processing properties of PA10T. Moreover, the anisotropy under tensile conditions after the TLCP orientation can form microfibers and improve the mechanical properties of the composites. The relationship between crystallization properties, tensile strength and TLCP content of TLCP/PA10T composites was also studied. Such TLCP/PA10T composites can serve as a high temperature special engineering plastic in industrial manufacturing.
Research Progress in the Preparation of Phosphor for White Light Emitting Diode
Authors: Li Xueye
Published: May 2022

As a solid-state lighting source, white light emitting diode (LED) has become the most promising green lighting energy source in the 21st century with its three advantages of energy-saving, environmentalfriendly and green-oriented. The study summarized the research progress in the preparation of phosphor for white light emitting diode, analyzed and compared the effects of different materials and synthesis methods on its luminescence performance. The future development trend was also prospected.
A preliminary study on assessment of lead exposure in competitive biathletes: and its effects on respiratory health
Authors: Turmel Julie , Bougault Valérie , Couture Joanie , Boulet Louis-Philippe
Published: May 2022

Aim: In this preliminary study, we aimed to assess the blood lead level (BLL) in biathletes compared to cross-country skiers, and to look at the effects on airway function, responsiveness, allergic sensitization and the report of training-induced respiratory symptoms. Methods: Eleven biathletes (19 ± 2 years old, sex: 6M:4F) and 12 cross-country skiers (18 ± 3 years old, sex: 4M:8F) had a blood sample, spirometry, bronchial provocation test to Methacholine, skin prick tests, and induced sputum. Biathletes performed the tests within 3 h after a 90 to 120 min shooting session (150 ± 45 bullets fired). Results: Lung function, airway responsiveness, sensitization to common airborne allergens, and the report of training-induced respiratory symptoms were not different between both groups of winter sport athlete. BLL was significantly higher in biathletes vs. cross-country skiers (geometric mean [95%CI]: 2.15 [1.37–2.94] μg/dL vs. 0.85 [0.81–0.89] μg/dL, respectively, p < 0.001, Cohen’s d = 1.25). One biathlete had a BLL greater than the recommended threshold (> 5 μg/dL). Significant correlations were observed in biathletes only between BLL and FEV1 and FVC in absolute value (r = 0.69, p = 0.02 and r = 0.69, p = 0.02, respectively). Conclusion: Despite higher BLL in biathletes, no difference in atopy, respiratory function or symptoms was observed with cross-country skiers in our experimental conditions.
Immunologie in der dermatologischen Praxis – wieviel, warum, wann?
Authors: Diamanti Evangelia , Föhr Julia , Papageorgiou Andria , Herbst Matthias , Jahn Sigbert
Published: May 2022

Die Haut als Grenzorgan zum Körperäußeren realisiert viele immunologische Abwehrfunktionen. Folglich sind Immunologie und Dermatologie eng miteinander verknüpft. Die Diagnostik immunologischer Hauterkrankungen und deren Immuntherapie, labormedizinische Analysen, Hyposensibilisierung – Begegnungen mit der Immunologie finden auch in einer dermatologischen Praxis im Alltag nahezu ständig statt. Ziel dieser Arbeit ist es, praxisnah aufzuzeigen, wie uns Dermatologen die Immunologie in unserer Fachdisziplin helfen kann.