bluuebunny/crossref_metadata_2025 huggingface dataset:
Global Warming Prediction Model of Fish Migration Based on ArcGIS
Authors: Yipeng Zhang , Dichao Ning , Wentao He
Published: November 2020

Rising global ocean temperatures will disrupt the livelihoods of people who depend on fishing for marine crops. Therefore, we propose fishery migration prediction models to solve the problem. We considered the effects of seawater temperature and salinity, and constructed a fish school migration prediction model based on ArcGIS. On this basis, a thermodynamic map of fish school distribution were made using ArcGIS software and kriging interpolation and nuclear density analysis. Moreover, linear interpolation and fitting are used to obtain the relationship between the annual fish movement distance and the year to predict the fish migration routes in the next 50 years.
Soil pH and Nutrient Characteristics of Newly-added Cultivated Land in Heyang, China
Authors: Li Gang , Zhang Ruiqing , Wang Ying , Lu Nan , Wei Yang , Chen Kehao
Published: November 2020

In order to understand the soil pH and main nutrient characteristics of newly added cultivated land in the eastern part of Guanzhong, and 160 soil samples were collected in 2016, the soil pH, organic matter, total nitrogen, available phosphorus and available potassium in Heyang County were studied The suitability distribution of the indicators, using stepwise regression and path analysis methods, analyzes the direct relationship between soil pH and soil nutrients, and provides a theoretical basis for improving the newly added cultivated land. The results showed that the soil pH in Heyang County varied from 8.42 to 9.67, the soil organic matter content varied from 3.46 to 17.93 g/kg, the soil total nitrogen content varied from 0.13 to 5.61 g/kg, and the soil available phosphorus changed The range is 1.73 ~ 63.06 mg/kg, and the soil available potassium range is 46.50 ~ 523.74. The newly added soil has a certain nutrient basis, but it should be further adjusted and improved during the cultivation process. The direct positive effect on soil pH value is mainly soil organic matter, and the direct negative effect is mainly soil available phosphorus. By adjusting the organic matter, total nitrogen, available phosphorus and available potassium in the soil, the pH value of the soil can be effectively improved, so that the newly cultivated soil is suitable for the growth of local crops.
A Modified Matrix Algorithm Dichotomy for Distribution Network Fault Location
Authors: Yan Hanyu , Wu Xueying , Lin Chunlan , Liu Haiyan
Published: November 2020

The operation mode of distribution network is diversified, and it is difficult to accurately locate the fault point when the fault occurs in the case of multiple power sources and branches. In order to accurately locate the fault point and quickly restore the power supply in the fault-free area, a bisection fault location method based on improved matrix is proposed. According to the feedback information of terminal feeder equipment, the improved matrix algorithm is used to form the grid structure matrix and fault information matrix base on the connection relationship of distribution network. The grid structure matrix reflects the connection relationship between nodes and the power flow direction of the distribution network in normal operation. The fault information matrix is the flow direction of power flowing through terminal equipment when the system fails. According to the grid matrix and fault information matrix, the fault judgment matrix is obtained to judge the fault area. Finally, the dichotomy method is used to judge the fault area and determine the specific fault point. The effectiveness and practicability of the method are verified by an example.
Soft Malleable Vesicles: versatile carriers for efficient topical delivery of fungal therapeutics
Authors: Gupta Preeti , Jha Antesh Kumar , Prasad Mahesh , Kushwaha Poonam
Published: November 2020

Fungal infections have become a subject of great concern and the incidence of fungal infections is increasing, presenting an enormous challenge to healthcare professionals. Since most of the fungal infections are occurring over the skin, the treatment option of these infections always involves topical application. However, in topical delivery drug reaches into systemic circulation through different barriers of skin. Nevertheless, due to the low permeability, skin restricts the movement of many drugs. Hence, a delivery system is required, which deliver the medicament into the skin layers or through the skin and into the systemic circulation. Ethosomes or Soft malleable vesicles are the novel lipid vesicular carrier that offer improved skin permeability and efficient delivery due to their structure and composition. They contain high concentration of ethanol, which increases the fluidity of the skin. Therefore, in the present paper, we have explored the utility of ethosomal systems in the topical treatment of fungal infections. Structure, compositions types, mechanism and techniques of preparation of ethosome also discussed in the paper.
Microsurgical Resection of a Large Dumbbell-Shaped Jugular Foramen Schwannoma via Infralabyrinthine, Retrofacial, and Transjugular Approach
Authors: Abe Daisu , Aoyagi Masaru
Published: November 2020

Surgical removal of large jugular foramen schwannomas with intra- and extracranial extension is challenging. The treatment goal is a gross total resection of the tumor without causing surgical complications, including facial nerve paresis, hearing disturbance, dysphagia, hoarseness, and cerebrospinal fluid (CSF) leakage, in addition to the brain stem injury.

We present a surgical video in a patient with a dumbbell-shaped glossopharyngeal schwannoma. The combination of posterior fossa craniotomy, mastoidectomy, and unroofing of the jugular foramen with high cervical exposure was selected. Although transposition of the mastoid segment of the facial nerve provides an excellent surgical corridor, it may affect normal facial nerve function. Sufficient drilling of the infralabyrinthine, retrofacial area of the mastoid without facial nerve transposition is important for the safe gross total removal of the tumor. Subcapsular removal behind the jugular vein is also important for preservation of the lower cranial nerve functions.

The patient underwent a gross total removal of the tumor (Figs. 1 and 2). Facial nerve function was preserved and hearing disturbance improved. Although dysphagia and hoarseness complicated postoperatively, he became able to take foods orally 16 days after the surgery.

In summary, successful removal of a large dumbbell-shaped jugular foramen tumor can be completed via infralabyrinthine, retrofacial, and transjugular approach without facial nerve transposition.

The link to the video can be found at: https://youtu.be/U4CwOW78id4.
Uso do aplicativo móvel Bone Ninja como ferramenta de avaliação e simulação pré-operatória em pacientes submetidos a osteotomia tibial alta
Authors: Kaul Rajiv , Akhoon Neha
Published: November 2020

Objetivo Nosso objetivo foi facilitar a simulação da correção no pré-operatório para permitir a tomada de decisão médico-paciente compartilhada em indivíduos submetidos a osteotomia tibial alta (OTA).

Método 22 pacientes foram submetidos a osteotomia tibial alta usando dispositivos de fixação internos ou externos para osteoartrite do compartimento medial do joelho. No pré-operatório, a avaliação dos parâmetros de deformidade e a simulação da osteotomia corretiva foram realizadas na presença do paciente, utilizando Bone Ninja. No pós-operatório, o nível de satisfação do paciente com a qualidade da explicação fornecida pelo uso deste software foi avaliado usando o Questionário de Satisfação do Paciente (Patient Satisfaction Questionnaire-short, PSQ-18, na sigla em inglês). Foi realizada uma comparação da correção obtida com recortes de papel e com o software de simulação.

Resultados Todos os pacientes ficaram satisfeitos com seu papel no processo de tomada de decisão. Eles mostraram uma boa compreensão e entendimento da cirurgia proposta. Não houve diferença estatisticamente significativamente entre o ângulo tibial proximal medial (ATPM) pré-operatório simulado obtido por recortes de papel e correção assistida por software. O escore médio do PSQ-18 para comunicação foi de 4,24 (0,88), para a qualidade técnica foi de 4,11 (0,59) e para a satisfação geral foi de 3,11 (0,68).

Conclusão Bone Ninja é uma ferramenta de planejamento de deformidade eficaz, conveniente, fácil de usar e econômica que substitui o método tradicional árduo de traçar no papel e com tesoura.
Follow-up Brucellacapt and Rose Bengal Tests in 110 Children with Brucellosis
Authors: Öcal Demir Sevliya , Bacalan Fatma
Published: November 2020

Objective The interpretation of serologic tests in brucellosis can be difficult because of nonspecific symptoms and vague signs of disease, and limitations of serological tests to distinguish persistent and cleared infection. Here, we evaluated the role of Brucellacapt test in conjunction with Rose Bengal test (RBT) in the follow-up of children treated for brucellosis.

Methods A total of 174 children diagnosed with brucellosis were included in the study. Data about demographic characteristics of patients, clinical and laboratory findings including Brucellacapt and RBT results, therapeutic approach, and response to treatment were collected from medical records.

Results Of the 174 cases, 109 (62.6%) were boys and 65 (37.4%) were girls. The mean age of children at the diagnosis was 122 ± 54 months. Sixty-four cases were excluded from the study for loss to follow-up. The follow-up period for the remained 110 cases was 4.3 ± 2.9 months. Eleven cases (10%) had persistent illness, 7 (6.4%) had recurrence/relapse, and 92 had favorable outcome. During the follow-up, Brucellacapt titers did not drop under 1/320 in cases with persistent illness, and it increased again to 1/320 in cases with relapses at average 6.1 months after treatment. In 48 of cases with favorable outcome, Brucellacapt titers decreased to 1/160 in average 3.3 ± 1.8 months; in 35 cases, RBT became negative in average 3.8 ± 2.5 months, and there was no statistically significant difference between them (p = 0.241). In cases with higher Brucellacapt titers on admission, decrement of titers took longer time.

Conclusion Persistent serological titers without clinical findings of brucellosis should not lead physician to prolong or repeat treatment because the decline in Brucellacapt titers and RBT negativity may be delayed in contrast to clinical recovery.
Measurement of Serum Chemerin, Oxidized LDL, and Vitamin D Levels in Prader–Willi Syndrome: A Cross-Sectional Study in Pediatric Egyptian Patients
Authors: Thomas Manal M. , Zaki Moushira E. , Youness Eman , Hamed Khaled , Khedr Azzah A. , Abd El-Massieh Phoebe M. , Abdo Sara M. , El-Bassyouni Hala T.
Published: November 2020

Prader–Willi syndrome (PWS) is the commonest genetic cause of obesity. Oxidative stress and chronic low-grade inflammation play a crucial role in the pathogenesis of obesity. Alterations of vitamin D (25-OHD) levels are commonly encountered with obesity. The aim of this study was to analyze serum chemerin, oxidized low-density lipoprotein (ox-LDL), and 25-OHD values in pediatric PWS patients in comparison with obese healthy children and nonobese control groups, highlighting possible correlations with body mass index (BMI) and obesity. Twenty-six PWS Egyptian patients and 26 obese healthy individuals referred to the outpatient clinic of the Clinical Genetics Department, National Research Centre, Cairo, Egypt, and 20 control patients with matching age and sex were enrolled in the study. Patients were clinically diagnosed and confirmed by routine cytogenetic and fluorescence in-situ hybridization analysis. Anthropometric measurements were performed, and BMI was calculated by weight/height2 (kg/m2), and BMI z score was also determined. Serum chemerin, ox-LDL, and vitamin D were determined by enzyme-linked immunosorbent assay. Chemerin levels, which reflected chronic inflammation, were significantly elevated as compared with obese and nonobese controls (p ≤ 0.0001). Concerning oxidative damage, children with PWS showed higher Ox-LDL levels compared with obese and nonobese controls (p < 0.0001). Vitamin D levels were significantly lower in PWS patients compared with obese and nonobese controls (p ≤ 0.0001). Our data showed that obesity in PWS is associated with oxidative stress and chronic low-grade inflammation. Ox-LDL is a good indicator of oxidative stress, and chemerin could be used as a biomarker for the chronic inflammatory state. Furthermore, vitamin D supplementation is recommended in PWS patients
Common sense politics: religion and belonging in French public space
Authors: Weitzel Michelle D.
Published: November 2020

Public “common sense” should be conceptualized as an important force structuring the politics of belonging. Homing in on the embodied and sensory aspects of common, taken-for-granted knowledge and the habits of perception that inform it, this article demonstrates how culturally entrained listening practices structure rights to the city and the exercise of citizenship. By tuning into the significance of ambient religious sound, it offers an empirical, ethnographic investigation into how common sense, in dialogue with constitutional and municipal law, shapes practices of citizenship and participation in French public space. The article argues that common sense deriving from perception and interpretation of public sound among majority French represents a stubborn obstacle to French Muslims’ exercise of full citizenship; indeed, it enacts a kind of violence that locks French Muslims out of agentive citizenry, rendering them objects to be muted at will, not fellow citizens to be heard.
Flexible roost selection by Gould’s wattled bats (Chalinolobus gouldii) using bat boxes in an urban landscape
Authors: Godinho Lisa N. , Lumsden Linda F. , Coulson Graeme , Griffiths Stephen R.
Published: November 2020

Bat boxes are often used as a conservation tool in human-disturbed landscapes across Australia; however, to assess their effectiveness we need to understand the factors influencing their occupancy by insectivorous bats. We investigated roost selection by Gould’s wattled bat (Chalinolobus gouldii) using 76 bat boxes, comprising six designs, across three sites in suburban Melbourne, Australia. We conducted monthly surveys for a year and recorded the physical characteristics of each box. Five species of bats were recorded but Gould’s wattled bats dominated box occupancy year-round at all three sites. Group sizes ranged from 1 to 58 individuals, with maternity colonies forming over summer. There was little consistency in the use of selection criteria by Gould’s wattled bats when choosing a bat box as a day roost, with considerable variability across sites and seasons, highlighting the flexibility in roost site selection by this widespread, adaptable species. Our findings show that bat boxes can be an effective tool for providing supplementary roosts for Gould’s wattled bats in urbanised landscapes. However, little is known about the impact on the whole bat community, especially disturbance-sensitive taxa, of artificially increasing roosting resources for common species.
Lagged atmospheric circulation response in the Black Sea region to Greenland Interstadial 10
Authors: Czymzik Markus , Nowaczyk Norbert R. , Dellwig Olaf , Wegwerth Antje , Muscheler Raimund , Christl Marcus , Arz Helge W.
Published: November 2020

Significance

Abrupt climate shifts in the Northern Hemisphere high latitudes during the last glacial propagate globally in a complex manner. Our understanding of this propagation is poor mainly due to cross-dating uncertainties between individual paleoclimate archives. We apply a record of the globally common
10
Be production rate variations to synchronize the Black Sea sediment record to central Greenland ice cores and investigate the hemispheric propagation of Greenland Interstadial 10, with minimized uncertainties in the relative timing. Our results suggest a bipartite climate response in the Black Sea region to the onset of the Greenland Interstadial, characterized by an in-phase decrease in winter severity and lagged shift in atmospheric circulation, explained by a time-transgressive thermal adjustment of the regional ocean interior.
Self-organization of cortical areas in the development and evolution of neocortex
Authors: Imam Nabil , L. Finlay Barbara
Published: November 2020

Significance

There exists a curious lacuna in our understanding of the development and evolution of cortical areas in the brain. Whereas massive research effort has focused on the development of primary sensory and motor areas, few such studies of higher cortical areas have been done, particularly at the earliest stages of development. In parallel, there exists intense interest in the interpretation of higher cortical areas across species, in how new areas of larger brains emerge. Using a network model of the developing cortex, we show here that new cortical areas may be the natural outcome of regularly scaling brains, arising as necessary products of an activity-driven developmental program conserved in the evolution of the cortex.
The role of “spillover” in antibiotic resistance
Authors: Olesen Scott W. , Lipsitch Marc , Grad Yonatan H.
Published: November 2020

Significance

Antibiotic resistance can spread from person to person, a phenomenon exemplified by the rapid global spread of novel resistance determinants. Antibiotic resistance can also “spill over” between family members or between a hospital and its surrounding community, such that antibiotic use in one population selects for resistance that is transmitted into the other population. In theory, antibiotic use in one population could spill over into its neighbors, making it difficult to understand to what degree a population’s own behavior, such as its antibiotic use, determines its level of resistance. Here we use theoretical modeling and observational data to quantify spillover, finding that even modest interactions between populations can lead to substantial sharing of resistance levels.
Sensitivity analysis of correspondence ghost imaging
Authors: Wu Guohua , Mo Huixia , Han Zhe , Li Junhui , Yang Dongyue , Peng Qian
Published: November 2020

In this letter, sensitivity analysis is adopted to interpret why correspondence ghost imaging can restore better images with fewer reference patterns which have larger bucket value fluctuation: these selected patterns are more alike with regard to the target to be restored. The contribution of reference patterns to imaging can be quantified as sensitivity coefficients. In addition, the peak signal-to-noise ratio and mean square error are calculated to compare the restored image quality, and results confirmed that sensitivity coefficients are more robust than bucket value fluctuation in the presence of noise for selecting reference patterns.
Systematic analysis of wavelet denoising methods for neural signal processing
Authors: Baldazzi Giulia , Solinas Giuliana , Del Valle Jaume , Barbaro Massimo , Micera Silvestro , Raffo Luigi , Pani Danilo
Published: November 2020

Objective. Among the different approaches for denoising neural signals, wavelet-based methods are widely used due to their ability to reduce in-band noise. All wavelet denoising algorithms have a common structure, but their effectiveness strongly depends on several implementation choices, including the mother wavelet, the decomposition level, the threshold definition, and the way it is applied (i.e. the thresholding). In this work, we investigated these factors to quantitatively assess their effects on neural signals in terms of noise reduction and morphology preservation, which are important when spike sorting is required downstream. Approach. Based on the spectral characteristics of the neural signal, according to the sampling rate of the signals, we considered two possible decomposition levels and identified the best-performing mother wavelet. Then, we compared different threshold estimation and thresholding methods and, for the best ones, we also evaluated their effect on clearing the approximation coefficients. The assessments were performed on synthetic signals that had been corrupted by different types of noise and on a murine peripheral nervous system dataset, both of which were sampled at about 16 kHz. The results were statistically analysed in terms of their Pearson’s correlation coefficients, root-mean-square errors, and signal-to-noise ratios. Main results. As expected, the wavelet implementation choices greatly influenced the processing performance. Overall, the Haar wavelet with a five-level decomposition, hard thresholding method, and the threshold proposed by Han et al (2007) achieved the best outcomes. Based on the adopted performance metrics, wavelet denoising with these parametrizations outperformed conventional 300–3000 Hz linear bandpass filtering. Significance. These results can be used to guide the reasoned and accurate selection of wavelet denoising implementation choices in the context of neural signal processing, particularly when spike-morphology preservation is required.
Counting statistics and microreversibility in stochastic models of transistors
Authors: Gu Jiayin , Gaspard Pierre
Published: November 2020

Multivariate fluctuation relations are established in several stochastic models of transistors, which are electronic devices with three ports and thus two coupled currents. For all these models, the transport properties are shown to satisfy Onsager’s reciprocal relations in the linear regime close to equilibrium as well as their generalizations holding in the nonlinear regimes farther away from equilibrium, as a consequence of microreversibility. In the first model, which is related to the Ebers–Moll transport model for bipolar junction transistors, there is no internal state variable and particle exchanges between the ports are described as a Markov jump process with constant rates. In the second model, the rates linearly depend on an internal random variable, representing the occupancy of the transistor by charge carriers. The third model has rates nonlinearly depending on the internal occupancy, as in single-electron transistors. For the first and second models, finite-time multivariate fluctuation relations are also established, giving insight into the convergence towards the asymptotic form of multivariate fluctuation relations in the long-time limit.
Construction and Application of Metal Equipment Supervision Management Information System
Authors: Li Hang , Zhang Xuechao , Zhang Ying , Zhang Yanfei , Chen Hao
Published: November 2020

Thermal power plant contains a large number of metal equipment. The data of construction, overhaul, maintenance and operation of metal equipment can fully reflect the safety status of the equipment. Aiming at a large number of metal supervision data of thermal power plants in Inner Mongolia, according to the requirements of national and industrial standards, a metal supervision and management information system including various data of metal equipment design, manufacturing, installation, use, inspection, transformation and repair, life assessment and other stages is established to realize the whole life cycle management of supervision equipment in thermal power plants. At the same time, make full use of the big data retrieval function of the system, realize the big data comparison of the same type of equipment or the same type of fault, provide sufficient information for the technical supervision and failure analysis personnel, and further improve the technical supervision and technical service quality.
Leakage failure analysis of water wall tube in circulating fluidized bed boiler
Authors: Ren Facai , Xu Jinsha , Si Jun
Published: November 2020

This paper analyzes the causes of water wall tube leakage failure in circulating fluidized bed boiler. According to the results of chemical analysis, the water wall meets the technical requirements. The difference of pearlite spheroidization degree in different regions indicates that there are different degrees of overheating in each region. The energy spectrum analysis of the surface residue in the perforation area shows that the corrosion in the perforation area is related to scale deposition.
Analysis on the microstructure and properties of P92 steel after long-term service at high temperature
Authors: Xinjun Jiang , Zhiqiang Sun , Chunpo Tang , Yao Xu , Long Zhou , Shaohua Yin , Zhongbing Chen
Published: November 2020

SA335-P92 steel is a kind of heat-resistant steel with martensitic lath as matrix and multi alloy composite strengthening, which has excellent high temperature performance. It is used for high temperature components of high parameter units in China for nearly 20 years. Many research institutions have done a lot of research on the properties and characteristics of high temperature aging and creep durability in the laboratory, but there are few researches on the micro-characteristics and properties of P92 steel after long-term service. In this paper, the studies are carried on the P92 steel of high temperature reheat steam pipeline taken from the first group of ultra-supercritical units in China. The microstructure characteristics and properties of the material are systematically studied by means of test methods such as micro metallography, scanning electron microscopy, EDS and mechanical properties. It is concluded that although the P92 steel after long-term service still remains the microstructure of martensitic lath, but the toughness greatly reduces caused by large amounts of large scale precipitates at the original austenite grain boundaries and lath boundaries.
Principle and Design of Chirped Fiber Grating
Authors: Mao Yan , Yan Xingpeng , Wang Weifeng
Published: November 2020

At present, as a feasible solution to the dispersion problem in optical fiber communication, chirped fiber grating has been widely used and concerned. This paper analyzes the principles of linear chirped fiber gratings and nonlinear chirped fiber gratings, and on the basis of summarizing the current design of chirped fiber gratings, two implementation methods of chirped fiber gratings are proposed.
Research on Edge Wave Deformation of High Strength Automobile Plate
Authors: Jie-tao Dai , Feng Zhou , Huiyuan Li , Liejun Li
Published: November 2020

Edge waves are the shape defects often encountered in the rolling process of automobile plates. The previous wave shape modal function cannot well reflect the situation that the on-site edge wave only occurs in a local area of the edge. In response to this problem, this article uses high-order trigonometric functions to describe the edge waves, and the obtained wave shape modes are consistent with the actual edge waves on site. On this basis, the energy method is used to calculate the critical buckling conditions of the edge waves. And using the perturbation method, the post-buckling path calculation model of the edge wave is established, and the post-buckling path of the edge wave is obtained. In order to verify the accuracy of the analytical calculation model, a finite element method is used to establish a simulation calculation model of the edge wave, and the buckling mode consistent with the scene was obtained. At the same time, the critical conditions of buckling are basically consistent with the analytical calculation results, reflecting the correctness of the analytical calculation model.
Numerical Simulation and Intelligent Optimization of Wax Injection in Investment Casting
Authors: Tan Shixin , Hao Xin , Wang Donghong , Lei Sixiong , Jiang Ming , Shu Da
Published: November 2020

Material property measurement was conducted in this study that can be used as input in Moldflow. The optimization scheme is simulated and actual experimented. The optimized process parameters is obtained by CAE and the response surface model. The packing time and packing pressure have the most significant effect on the average shrinkage of thin-walled wax pattern, followed by mold temperature and injection temperature. The deformation dimension of the wax pattern has been significantly improved.
Effect of Nonbonded Hydrogen on Structure and Properties of DLC Films
Authors: Bi Jun , Peng Jihua , Li Liejun , Shi Pingyi , Zhou Feng
Published: November 2020

a-C: H films were prepared on the surface of 316 L stainless steel, aluminum foil and single crystal silicon (100) waferby PE-CVD. The effect of nonbonded hydrogen on the thermal stability and properties of the films was discussed. The analysis results show that the H elements in this a-C: H film mainly exists as free states of H molecules or H atoms. The graphitization stage of the a-C: H films prepared in this experiment are obviously divided into two stages by the precipitation of non-bonded H 564°C. At the same time, the escape of non-bonded H significantly resulted in the release of internal stress and significantly promoted the second stage graphitization. Under the action of hydrogen evolution and graphitization, the microstructure of carbon film is rearranged and agglomerated in a certain direction.
Fracture behavior of a one-step quenching and partitioning steel characterized using uniaxial tension and double edge-notched tension
Authors: Yang Dezhen , Xiong Zhiping
Published: November 2020

The fracture behavior was characterized using uniaxial tension and double edge notched tension (DENT) in a one-step quenching and partitioning steel. This steel consisted of lamellar matrix (tempered martensite and bainitic ferrite lath) together with dispersed blocky and film RA/M (retained austenite and/or fresh martensite). Lamellar structure promoted trans-lath fracture; whereas, blocky RA/M island contributed to ductile fracture in uniaxial tension but induced brittle fracture in DENT test because a higher stress triaxiality in the latter enhanced the rate of martensite transformation and in turn boosted early crack nucleation and propagation.
Multi-modal big data knowledge aggregation for advanced automobile intelligent manufacturing operation and maintenance
Authors: Rui Yang , Zhijie Xu , Tianjie Xie , Yu Zhang
Published: November 2020

In this study, automatic knowledge extraction technology is analyzed for advanced automobile intelligent manufacturing operation and maintenance multi-modal information with knowledge graph construction method and complex knowledge reasoning method. An association representation model is proposed based on deep feature learning, a unified multi-modal semantic space is constructed, and a semantic matching technology for multi-modal equipment operation and maintenance is designed based on the reasoning method of deep recurrent neural network.
The Robot Intelligent Spraying Glazing System for Sanitary Ceramics Industry
Authors: Qian Zhou , QingLong Mo , YongQian Xu , Lin Gan
Published: November 2020

Aiming at the current situation and existing problems of the sanitary ceramics industry, the paper presents the R&D of a set of multi - robot cooperation in the spraying glazing system. Firstly, the paper introduces the requirement of spraying glazing and puts forward the technics of spraying grazing robot. Then the paper introduces the system solution of spraying glazing robot, the working mode of the cooperative multi-robot, and the method of robot trajectory planning. Finally, according to the real experimentation of established spraying glazing robot system, the paper tested and verified the performance of the system. This system plays a positive demonstration role in the sanitary ceramics industry.
Design and Analysis of Iron Roughneck Non-Clamp-Tooth Clamping Mechanism
Authors: Yan Wenhui , Xie Dong , Guo Litong , Zhao Longgui , Peng Yong , Hu Nan
Published: November 2020

During the makeup and breakout operation of iron roughneck, the performance of the clamp tooth holding the pipe string directly affects the drilling efficiency and the service life of the pipe string. In this paper, a cylindrical non-clamp-tooth Clamping body with 20CrMnTi material is designed to replace the upper shackle clamp tooth. In the up-shackle operation of the torque wrench, the clamping body contacts the outer wall of the string in the form of two parallel axis cylinders, the relationship between each influencing factor and contact stress is established, and the contact stress and deformation of the string are simulated by finite element method. This non-clamp-tooth clamping body can reduce the damage degree of the string, make its elastic deformation not exceed 1mm, and improve the service life of the clamping body.
Transferring Process of Matter Content in the Center of the Bay
Authors: Yang Dongfang , Huang Xinmin , Jiang Tao , Wei Linzhen , Chen Mei
Published: November 2020

Based on investigation data on Pb in Jiaozhou Bay waters in May, August and October 1992, the author introduces horizontal and vertical variation models of matter content to calculate the horizontal loss amount, vertical dilution amount and vertical sediment amount of the Pb content in both surface and bottom waters and establishes modeling chart of its horizontal and vertical variation. The results show that the absolutely and relatively horizontal loss amount of the Pb content in the bottom waters were 6.23μg/L and 59.73% respectively in May. Absolutely horizontal increase amount of the Pb content in the bottom waters varied from 4.14 to 5.51μg/L, and relatively horizontal increase amount varied from 22.59% to 35.59% in August and October. In May, August and October, the Pb content in both surface and bottom waters had an absolutely vertical dilution amount of 2.18μg/L and a relatively vertical dilution amount of 22.54% in the waters of the southeast of the bay. Besides, the absolutely vertical sediment amount of the Pb content in both surface and bottom waters ranged from 4.89μg/L to 7.58μg/L and the relatively vertical sediment amount ranged from 40.14 to 46.88% in the same waters. As for in the central waters of the bay, the absolutely and relatively vertical dilution amount were 3.17μg/L and 43.01% respectively, the absolutely and relatively vertical sediment amount were 1.18-18.86μg/L and 10.14-77.32% respectively during the same period. The variation model of matter content reveals that the Pb content transported by the main sea currents settled as sediment in the waters of the southeast of the bay, and it continued to accumulate in the bottom waters from May to August. The Pb content in that area was transported to the bottom waters of the center of the bay through the bottom of ocean floor so that a large amount of the Pb content was accumulated there from August to October. The author introduces the transferring process of the matter content in the center of Jiaozhou Bay: matter content brought by the main sea currents settles as sediment in the offshore waters and keeps accumulating in its bottom layer under the tidal effect and current action then moves through the bottom layer of the ocean floor to the bottom waters of the center of the bay. As a result, the matter content accumulates a lot there, and keeps rising to reach its surface waters.
Corrosion Behavior of 316L Stainless Steel Weld under Constant Strain
Authors: Xiejunjun  , Wangao  , Yuanyongliang  , Gaoyang
Published: November 2020

316L stainless steel is widely used in the fields of thermonuclear industry and petrochemical industry due to its excellent comprehensive mechanical properties and corrosion resistance. Especially in the petroleum industry, 316L stainless steel is commonly used as oil pipelines and storage tanks because of its high corrosion resistance to media such as CO2. However, Petroleum and natural gas generally contain corrosive media, such as high concentrations Cl−, CO2, H2S. When petroleum pipelines work in such a strong corrosion environment for a long time, pitting corrosion or stress corrosion cracking is easy to occur, and these corrosion behaviors preferentially occur in defects such as welds and heat-affected zones. Therefore, in order to ensure the safety and durability of oil and gas export process, it is necessary to study the stress corrosion cracking sensitivity of oil and gas pipeline, especially the stress corrosion sensitivity of oil and gas pipeline weld seam, heat affected zone and other defects. the paper uses three-point bending loading method, and the corrosion morphology of the sample is analyzed by optical microscope. Researching 316L stainless steel weld corrosion behaviors under constant strain.
The Design of The Algorithm For Measuring The Straightness of Deep Hole Based on Matlab
Authors: Liu YanShu , Wang Chi , Wang Yu , Liu Hui , Wang Kun
Published: November 2020

Straightness of deep hole is an important quality index of deep hole parts. Due to the different methods of detecting the straightness of deep hole, the accuracy of the mathematical model for straightness evaluation is also different. In order to get a more accurate measurement method, this paper through the bus measurement, using the principle of least square method to evaluate straightness, establishes a mathematical model suitable for the measurement method, and uses MATLAB software to compile the data processing program. The automatic calculation of straightness error is realized, and the feasibility of the algorithm is verified by simulation experiment.
Application technology of hot film flow sensor in intelligent electronic cigarette
Authors: Zhang Bin , Ma Pengfei , Zheng Xiaoyin , Qiu Guocai , Chen xinzhun
Published: November 2020

The application technology of hot film flow sensor in intelligent electronic cigarette is discussed, and the hardware scheme and software implementation of the technology are discussed and studied. This paper forecasts the development trend of intelligent electronic smoke for smoke inhalation monitoring.
Remote Sensing Images Data Augmentation Based on Style Transfer under the Condition of Few Samples
Authors: Jiang Yuchen , Zhu Bin , Xie Bo
Published: November 2020

To solve the problem that the detection accuracy of remote sensing image is affected by convolution neural network overfitting under the condition of small samples, a data augmentation method based on style transfer is proposed, in which new data is generated from texture of external domain to source domain by using cycle-consistent adversarial networks(CycleGAN). The experiment results show that the accuracy of detection and recognition is improved after adding the generated data to the original data.
Research on ingot casting of multicrystalline silicon miscellaneous materials for solar cell
Authors: Yang Xiufan , Zhang Dianxi , Guo Zhongzheng , Yan Wanjun , Zhang Houyong
Published: November 2020

Using multicrystalline silicon miscellaneous materials for ingot casting, optimizing the ingot casting process and charging formula, the utilization rate of silicon material is 66.15%, effectively improving the utilization of multicrystalline silicon miscellaneous materials. The minority carrier lifetime of the silicon block is 5.02us, which meets the requirements of solar cell products. The other electrical properties of the silicon block meet the needs of the product, and the miscellaneous ingots realize the reuse of resources, greatly reducing production costs and improving benefits.
Mechanical and electrolytic hybrid grinding of metal ceramic composites using coarse diamond grinding wheel
Authors: Lu Yanjun , Sun Jiajing , Chen Fumin , Mo Rui , Li Liejun , Gao Jixiang
Published: November 2020

The application and development of metal ceramic composites have been restricting due to its low grinding efficiency and ground quality. In this paper, the hybrid machining technology combined mechanical with electrolytic grinding based on dressed coarse diamond grinding wheel is proposed to perform efficient and precise grinding of metal ceramic composites. First, the dry electrical discharge dressing technology was used to dress coarse diamond grinding wheel to obtain high grain protrusion and sharp micro-grain cutting edges. Next, the mechanical and electrolytic hybrid grinding process using dressed coarse diamond wheel was developed to grind metal ceramic. Finally, the effects of different process parameters on ground surface topographies and surface roughness were investigated. It is shown that the proposed hybrid grinding method was feasible and can effectively improve the ground surface quality. The experimental results show that the optimal process parameters including the depth of cut, open-circuit voltage and impulse width were 5 μm, 20 V and 400 ns, respectively. Compared with traditional mechanical grinding, the ground surface roughness by the proposed hybrid machining method was improved by about 25%.
Intelligent breakout prediction method based on support vector machine
Authors: Tian Yuanpeng , Liu Yu
Published: November 2020

Breakout is a serious accident during continuous casting. In order to reduce breakout accident, a breakout prediction method was proposed based on support vector machine model. The typical characteristics of continuous casting breakout were reconstructed by thermocouple temperature signals. The temperature data of three adjacent thermocouples in the first row were added and then connected with the temperature data of the middle second row, which was used to capture the typical spatial characteristics of breakout. The 80% of true and false breakout samples were used to train the support vector machine model and 20% samples were used to test the model. The results show that this method can predict all breakouts, which has a true-sticker alarm rate of 100%. There is one false alarm and the accuracy rate is 95.8%.
Finite Element Analysis of the Deformation Behavior of the Up and Down Roll Differential Diameter Rolling for Medium Plate
Authors: Wang Weihua , Lu Shiping
Published: November 2020

In order to realize the rolling technology with different reduction of upper and lower surface in the production of medium and heavy plate, a rolling technology with the same rolling line speed and different diameter of upper and lower rolls was adopted in a factory, and good results were achieved. This technology is different from the previous large roll diameter difference rolling and differential speed rolling. Large roll diameter difference rolling is an asynchronous rolling technology, which uses the difference of upper and lower roll diameter to cause the different linear speed of rolling, so as to achieve the purpose of upper and lower pressure rolling. It is mainly used in the production of section steel, and belongs to the asymmetric rolling condition. Under the condition of asymmetric rolling with unequal roll diameter, a three-dimensional large deformation and asymmetric rolling FEM model is established by using the finite element software. The stress and deformation behavior of the deformation area of the steel plate are analyzed. The fiber length changes along the longitudinal direction at different thickness positions and the shape change of steel plate in the rolling process are obtained. The results show that when the diameter of the upper roll is larger than that of the lower roll, the Mises equivalent stress, equivalent plastic strain and the change of the length of the longitudinal fiber in the deformation area are approximate distributed symmetrically along the center of the two sides, the center value of steel plate is small, and the upper and lower surface values are large; the equivalent stress of the lower surface is larger than the upper surface, and the minimum change of the fiber length appears about 1/3 of the thickness from the lower surface. Under the condition of asymmetric up and down rolling, the head of steel plate tends to down-bending. The maximum distance of the steel plate head buckle ∆y is 0.185 m, the bending radius is 6.519m and the bending curvature is 0.153.
Research of A Macro Program for Bolt Hole Patterns Based on EXCEL®
Authors: Pingping Liu , Danhao Qian , Konglei Zhu
Published: November 2020

EXCEL® is a Microsoft Office software product, which has excellent numerical and logic calculation and analysis functions. The method of programming a CNC macro program using EXCEL® is being presented in this paper for the first time. By defining the locations of a hole pattern geometrically, and simulating the programming of a macro, it can be demonstrated that a CNC program using macros is simple and easy to understand, and the program is flexible, generic and portable.
Thermal decomposition of magnesium acetate in nitrogen
Authors: Jiang Yu , Chen Hukui , Mu Xiaxia , He Zhijun
Published: November 2020

In this paper, the thermal decomposition process of magnesium acetate, Mg (CH3COO)2·4H2O, in nitrogen atmosphere was studied by thermal analysis methods, and the solid products after thermal decomposition were analyzed by XRD, FE-SEM and EDS. The results show that the thermal decomposition process of magnesium acetate went through four steps: the first step was the dehydration of magnesium acetate to produce anhydrous magnesium acetate; the second step was the conversion of anhydrous magnesium acetate to magnesium oxalate; the third step was magnesium oxalate to magnesium carbonate, and the final step was magnesium carbonate to magnesium oxide.
Research on innovative design of vehicle loading plate for non avoidance stereo garage based on ARIZ
Authors: Zhang Po , Zhang Mingqin , Wang Hong
Published: November 2020

As a form of garage with simple structure and convenient installation, non avoidance stereo garage is widely used in densely populated places such as shopping malls and hospitals. It can effectively improve the land utilization rate in a narrow space, which is of great significance to solve the parking problem. In this paper, the ARIZ algorithm of TRIZ is used to deeply study the car loading plate of non avoidance stereo garage in the market, and analyze the shortcomings of its existing structure. According to the process of ARIZ algorithm solving the problem, the nonstandard problem is transformed into a simple problem model, and the ideal solution is conceived. Using the conflict matrix and 40 invention principles, a new type of vehicle loading plate for non avoidance stereo garage is designed Vehicle loading plate structure.
Experimental Analysis of the Car Body Suspended Equipment Vibration for High-speed Railway Vehicles
Authors: Deng Hai , Chen Sijie
Published: November 2020

Existing researches state that the rigid-flexible coupling vibration of the car body and car body suspended equipment deteriorates the ride comfort of a high-speed train, but a few works validate it through field tests. In this investigation, field measurements on the vibration of bogie, car body and car body suspended equipment of a high-speed train was carried out to reveal their coupling interaction characteristics. A design solution for the equipment suspension frequency is then summarized by its weight and excitations bears on. Tests show that bogie dominates a lateral vibration at 4.5 Hz in normal track segments but it rises to 7.4 Hz while hunting occurs. The equipment acceleration is significantly larger than that on car body since the high-frequency vibration bears on it is well isolated from the car body. When bogie hunting occurs, a structural resonance on the car body was noticed, and the lateral and vertical acceleration on equipment rise to 0.2 g and 0.4 g, respectively, with respect to 0.1 g and 0.2 g in a normal case. The vibration discrepancy on the equipment among track lines is quite obvious.