bluuebunny/crossref_metadata_2025 huggingface dataset:
Prosody perception meets language attitudes
Authors: Lang-Rigal Jennifer
Published: March 2020

A long pre-tonic vowel is associated with the regional variety of Cordoban Spanish in Argentina (Lang-Rigal, 2015a). This paper seeks to discover how, and if, prosodic production is correlated with perceived competence. Listeners judged the intelligence and occupation of anonymous speakers based on samples of their spontaneous speech. Results show that perceived speaker intelligence and occupation correlate with the degree of pre-tonic vowel lengthening (t = 4.577, p < .01). When a longer pre-tonic vowel was produced, the speaker’s competence was more negatively evaluated. However, Córdoba speakers were evaluated positively for attractiveness and integrity, supporting Labov et al. (1968), Giles (1971, 1973), and Preston (1999) who found regional varieties were viewed as non-standard and of lower social status relative to the perceived standard dialect.
Moral ortothanasia and the right to die
Authors: Lolas Stepke Fernando
Published: March 2020

Based upon a historical analysis of death and
dying in different contexts and reflecting on the interfaces between
religion, philosophy, and medicine, this paper elaborates on the
ethical quandaries associated with the process of dying from three
different narrative perspectives: first, second, and third person. A
sound pragmatics of care is developed when these three narrative
voices are integrated into a meaningful whole. The process becomes
then a true ortothanasia: dying is in harmony with personal
expectations and desires, the needs of relevant
others and the regulations implicit or
explicit in society. It is contended that beliefs and
practices designed to fit into one of the narratives may not
necessarily serve to explain phenomena in other discourses. A right
ortothanasia demands an hermeneutics of death and a dialectics of
dying.
In the wake of loss
Authors: Gil-Juliá Beatriz , Ballester-Arnal Rafael
Published: March 2020

The loss of a loved one may be considered as one
of the major life-event stressors not only by its near inevitability
but also by the high likelihood that we will go through it more than
once in the course of a normal life span. Most people experience the
loss as a natural response to a loved one’s death. Nevertheless, for
a significant minority this process can be complicated. In the wake
of loss, grief, mourning and bereavement appear to be synonymous
terms although they differ in their clinical manifestations.
Tackling the nuances linked to these concepts and the main issues
involved in an adaptive or non-adaptive course of adjustment to the
loss will be the aim of this chapter.
‘Letters to Lucilius’ and death
Authors: Pujante David
Published: March 2020

Moral Letters to Lucilius is a
highly modern work in terms of both its generic complexity and its
approach, which resembles a self-help treatise written in the
twenty-first century. Seneca bases his letters on stoic approaches
that may be very useful to today’s society, which lives facing
outwards, frightened and stressed. The objective is to attain a
moral freedom and an inner independence that removes the fear of
death, among other benefits.
The scenography of death in contemporary poetry
Authors: Salvador Vicent , Mira Irene
Published: March 2020

From the perspective of new studies on
spatiality, which favours the concept of
place (as opposed to the broader concept of
space), representations of death are linked to
specific places that are typical of each culture. In our current
culture, places such as the sanatorium, the hospital, the dying
house, the coffin and the cemetery are often related to the concept
of heterotopia designed years ago by Michel
Foucault. Some types of heterotopia that are related to death have a
high performance in the semiotics of contemporary poetry. In his
work, the Catalan poet Vicent Andrés Estellés (1924–1993) depicts
scenes of death that integrate many of these places, objects,
characters and sequences of actions. This scenography, which is
strongly shaped by metaphorical and metonymic mappings, is an
essential ingredient of his poetic semiosis as part of the treatment
of the subject matter of death and dying.
Beyond the limits of death
Authors: Molpeceres Sara
Published: March 2020

In this paper I will discuss two ways of
extending the human life-span that have been used in Science
Fiction. The first involves uploading the human mind onto a computer
after physical death. The second involves a sinister scenario in
which clones, doubles or virtual simulacra or simulations are
created to emulate living or dead human beings. My aim is to explore
these two options and examine their epistemological and ontological
implications: being human without a body; the nature of an uploaded
mind beyond the body’s physical death; and the role of experience,
memory and emotion in the construction of human identity.
The role of the definite article in the rise of the German
Framing Principle
Authors: Ronneberger-Sibold Elke
Published: March 2020

This paper develops ideas broached in Ronneberger-Sibold (2010)
on the origins of the divergent typological developments of English
towards a “classical” analytic S-V-O language, and German into a
“framing” language, in which the dominating typologically relevant
feature is the framing of different constituents by two elements
related to each other, such that the recipient can conclude from the
appearance of the first element that the constituent in question
will not be complete before the second element appears. This
principle was discovered and gradually implemented by German
language users in a self-fortifying process from OHG on. To isolate
specifically OHG prerequisites for this process, two comparable
alliterative poems, one in each language, were analysed with respect
to separable verbal complexes, verb position as a marker of sentence
type, and the structure of complex noun-phrases. The most radical
differences concerned the noun-phrase, and particularly the definite
article, whereas the differences in verb position were less
pronounced. Therefore, a scenario of the first steps of the
typological divergence is outlined in which the OHG definite article
plays a decisive role.
Cliticization of definite articles to prepositions in Middle High
German – early stages of grammaticalization?
Authors: Waldenberger Sandra
Published: March 2020

The subject of this contribution is clitic forms
of preposition and definite article in Middle High German (AD
1050–1350). Given the fact that some of these contractions (e.g.
am, im, ins,
zum, zur) have, in varying
degrees, undergone grammaticalization and have been integrated into
the system of definiteness markers in contemporary Standard German
(Er fliegt zum Mond vs. *Er fliegt zu
dem Mond), it seems likely that the documented
instances of such Preposition Definite Article Clitics (PDCs) in MHG
constitute an early stage of grammaticalization. This contribution
addresses this question by means of a qualitative empirical
approach, using the korpus der mittelhochdeutschen
grammatik. The results show that the MHG forms anticipate
the later stage of the development in modern German.
Absence as evidence
Authors: Dammel Antje
Published: March 2020

In simple noun phrases, the generalization of
definiteness marking to all kinds of head nouns was well-advanced by
the Early New High German period (ENHG). In conjoined noun phrases,
however, coordination ellipsis of determiners was common and subject
to fewer restrictions than in Modern Standard German (MSG). A corpus
analysis reveals a there-and-back change in the
frequency of coordination ellipsis within ENHG and early NHG and a
substantial structural change in its conditioning towards MSG. The
semantic and pragmatic regularities favouring coordination ellipsis
across diverging grammatical features in (E)NHG can be described in
terms of natural coordination (the probability of concepts to
co-occur). Towards MSG, formal constraints on morphosyntactic
feature combinations (gender, number) prevail. A possible
explanation combines internal and external factors:
grammaticalization and codification. Methodologically, it turns out
fruitful to regard not only the spread of a new gram, but also
constructions favouring its absence.
Die Capital – der Astra – das Adler
Authors: Nübling Damaris
Published: March 2020

German proper names can be divided into two large
classes, i.e. one with and one without an obligatory definite
article. It will be shown that this article is part of a classifier
system, which provides semantic information about the referent.
Furthermore, the inherited three-gender system in combination with
the presence or absence of the article is used to create a new
system of six proper name classes. This paper deals with a
diachronic change where so-called junk is transferred into a new
classifier system arguing for a case of exaptation with respect to
the article and for a case of degrammaticalization with respect to
gender. This development towards a classifier system has occurred
rather recently. Its consolidation can be observed in Present-Day
German and creates a high amount of variation.
Between empire and independence: Armenia and the Transcaucasian Democratic Federative Republic
Authors: Zolyan Mikayel
Published: March 2020

The period of the short-lived Transcaucasian Democratic Federative Republic (TDFR) or Transcaucasian Federation was from the Armenian perspective a traumatic one, defined by the military threat coming from the Ottomans and by the complicated relations with the other major ethnic groups of the region. The Armenian political elite and “common Armenians” were caught off-guard by the Russian revolution. The Turkish advance of the Caucasus Front was seen by Armenian political forces as an existential threat, yet this assessment was not necessarily shared by counterparts in the Transcaucasian Federation, especially the Muslim (Azerbaijani) political forces, leading to bitter divisions within the emerging Transcaucasian institutions. These two factors determined the Armenian perspective on the Transcaucasian Federation. The Armenian political entities (first and foremost the Dashnaktsutyun) were opposed to the creation of the Transcaucasian Federation, as they saw its emergence as the result of Ottoman pressure. Yet they were equally reluctant when it came to the transition from the Transcaucasian Federation to independent nation-states. This attitude was reflected in the fact that the Armenian National Council lagged behind its Georgian and Azerbaijani counterparts when it declared itself to be the central body of power in the Armenian-inhabited lands.
Structure of KCNH2 cyclic nucleotide-binding homology domain reveals a functionally vital salt-bridge
Authors: Ben-Bassat Ariel , Giladi Moshe , Haitin Yoni
Published: March 2020

Human KCNH2 channels (hKCNH2, ether-à-go-go [EAG]–related gene, hERG) are best known for their contribution to cardiac action potential repolarization and have key roles in various pathologies. Like other KCNH family members, hKCNH2 channels contain a unique intracellular complex, consisting of an N-terminal eag domain and a C-terminal cyclic nucleotide-binding homology domain (CNBHD), which is crucial for channel function. Previous studies demonstrated that the CNBHD is occupied by an intrinsic ligand motif, in a self-liganded conformation, providing a structural mechanism for the lack of KCNH channel regulation by cyclic nucleotides. While there have been significant advancements in the structural and functional characterization of the CNBHD of KCNH channels, a high-resolution structure of the hKCNH2 intracellular complex has been missing. Here, we report the 1.5 Å resolution structure of the hKCNH2 channel CNBHD. The structure reveals the canonical fold shared by other KCNH family members, where the spatial organization of the intrinsic ligand is preserved within the β-roll region. Moreover, measurements of small-angle x-ray scattering profile in solution, as well as comparison with a recent NMR analysis of hKCNH2, revealed high agreement with the crystallographic structure, indicating an overall low flexibility in solution. Importantly, we identified a novel salt-bridge (E807-R863) which was not previously resolved in the NMR and cryo-EM structures. Electrophysiological analysis of charge-reversal mutations revealed the bridge’s crucial role in hKCNH2 function. Moreover, comparison with other KCNH members revealed the structural conservation of this salt-bridge, consistent with its functional significance. Together with the available structure of the mouse KCNH1 intracellular complex and previous electrophysiological and spectroscopic studies of KCNH family members, we propose that this salt-bridge serves as a strategically positioned linchpin to support both the spatial organization of the intrinsic ligand and the maintenance of the intracellular complex interface.
Effects of electrical properties on vibrations via electromechanical coupling in triboelectric energy harvesting
Authors: Fu Yiqiang , Ouyang Huajiang , Davis R Benjamin
Published: March 2020

Vibration energy harvesting has been a popular research topic in recent years and is a promising technology in the development of the Internet of Things. Triboelectric energy harvesting, as a relatively new energy harvesting technique, is drawing attention. However, relevant studies from the perspective of structural dynamics are rare, and a study on how the electrical properties of triboelectric energy harvesters (TEHs) affect their vibration is still missing. In this paper, we perform such a study for TEHs that use the two most common working modes—namely the lateral sliding mode and the vertical contact-separation mode. In the first part of the paper, the coupled electromechanical model of a sliding mode TEH—based on a cantilever beam system involving friction—is established. The effects of the tribo-charge surface density and the load resistance on the vibration of the harvester are investigated. It is found that the effects of the tribo-charge surface density on vibrations are similar to those of mechanical damping, while the load resistance can result in an interesting resistive shunt damping phenomenon which is distinct from the one found in piezoelectric energy harvesters. In the second part, the modelling of a vertical contact-separation mode TEH is established based on a single-degree-of-freedom vibro-impact oscillator, and the effects of the same electrical properties on vibrations are studied. The variation of the tribo-charge surface density can result in both vibration amplitude attenuation and resonance frequency shifting, while the change of the load resistance can influence vibrations only in the case of large tribo-charge surface densities. This study further unveils the electromechanical coupling mechanisms in TEHs and sheds some light on achieving desirable dynamic responses of TEHs via tuning their electrical properties.
105Pd NMR and NQR study of the cubic heavy fermion system Ce3Pd20Si6
Authors: Jakovac I , Horvatić M , Schwier E F , Prokofiev A , Paschen S , Mitamura H , Sakakibara T , Grbić M S
Published: March 2020

We report 105Pd nuclear magnetic resonance (NMR) and nuclear quadrupolar resonance (NQR) measurements on a single crystal of Ce3Pd20Si6, where antiferroquadrupolar and antiferromagnetic orders develop at low temperature. From the analysis of NQR and NMR spectra, we have determined the electric field gradient (EFG) tensors and the anisotropic Knight shift (K) components for both inequivalent Pd sites—Pd(32f) and Pd(48h). The observed EFG values are in excellent agreement with our state-of-the-art density functional theory calculations. The principal values of the quadrupolar coupling are

MHz and

MHz, for the Pd(32f) and Pd(48h) sites, respectively, which is large compared to the Larmor frequency defined by the gyromagnetic constant

MHz/T for 105Pd. Therefore, the complete knowledge of K and the EFG tensors is crucial to establish the correspondence between NMR spectra and crystallographic sites, which is needed for a complete analysis of the magnetic structure, static spin susceptibility, and the spin-lattice relaxation rate data and a better understanding of the groundstate of Ce3Pd20Si6.
Rare-earth thin films and superlattices
Authors: Goff J P
Published: March 2020

This paper reviews neutron and x-ray diffraction studies of the magnetism of rare-earth thin films and superlattices grown using the LaMBE Facility in Oxford. Epitaxial strain is found to change the magnetic ordering and surface effects are shown to alter the critical exponents for phase transitions. The magnetic coherence across spacer layers is found to depend on the band structure of the superlattice as a whole, and the conduction-electron spin-density wave responsible for interlayer magnetic coupling is measured directly.
Inhomogeneous field calibration of a magneto-optical indicator film device
Authors: Gerken Manuela , Sievers Sibylle , Schumacher Hans Werner
Published: March 2020

A concept for the traceable calibration of magneto-optical indicator film (MOIF) based magnetic field imaging devices is presented and discussed for the example of a commercial MOIF device with a 60 × 45 mm2 sensor. The calibration facilitates a quantitative and fast characterization of magnetic microstructures combining relatively high spatial resolution with large imaging areas. The macroscopic calibration is performed using the homogeneous magnetic stray field of a pre-characterized electromagnet with a large pole shoe diameter of 250 mm. However, this calibration alone cannot yet account for the vectorial and spatially fast decaying stray fields of magnetic microstructures. For that, a forward simulation approach is pursued, based on the temperature-dependent magnetic parameters of the MOIF material as resulting from superconducting quantum interference device magnetometry and ferromagnetic resonance measurements. This is complemented by a transfer function-based approach to correct the impact of the sensor thickness and in-plane stray field components. The validity of the combined calibration and simulation approach is proven by means of a quantitative characterization of a magnetic scale. For the commercial MOIF device a 28.4 µm spatial resolution and 1.18 mT field resolution is achieved. The calibration is validated by a comparison to scanning Hall probe microscopy results. Furthermore, the uncertainty budget is discussed.
A filtering approach for PET and PG predictions in a proton treatment planning system
Authors: Pinto M , Kröniger K , Bauer J , Nilsson R , Traneus E , Parodi K
Published: March 2020

Positron emission tomography (PET) and prompt gamma (PG) detection are promising proton therapy monitoring modalities. Fast calculation of the expected distributions is desirable for comparison to measurements and to develop/train algorithms for automatic treatment error detection. A filtering formalism was used for positron-emitter predictions and adapted to allow for its use for the beamline of any proton therapy centre. A novel approach based on a filtering formalism was developed for the prediction of energy-resolved PG distributions for arbitrary tissues. The method estimates PG yields and their energy spectra in the entire treatment field. Both approaches were implemented in a research version of the RayStation treatment planning system. The method was validated against PET monitoring data and Monte Carlo simulations for four patients treated with scanned proton beams. Longitudinal shifts between profiles from analytical and Monte Carlo calculations were within -1.7 and 0.9 mm, with maximum standard deviation of 0.9 mm and 1.1 mm, for positron-emitters and PG shifts, respectively. Normalized mean absolute errors were within 1.2 and 5.3%. When comparing measured and predicted PET data, the same more complex case yielded an average shift of 3 mm, while all other cases were below absolute average shifts of 1.1 mm. Normalized mean absolute errors were below 7.2% for all cases. A novel solution to predict positron-emitter and PG distributions in a treatment planning system is proposed, enabling calculation times of only a few seconds to minutes for entire patient cases, which is suitable for integration in daily clinical routine.
Foreign demand for agricultural commodities drives virtual carbon exports from Cambodia
Authors: Johansson Emma , Olin Stefan , Seaquist Jonathan
Published: March 2020

Rapid deforestation is a major sustainability challenge, partly as the loss of carbon sinks exacerbates global climate change. In Cambodia, more than 13% of the total land area has been contracted out to foreign and domestic agribusinesses in the form of economic land concessions, causing rapid large-scale land use change and deforestation. Additionally, the distant drivers of local and global environmental change often remain invisible. Here, we identify hotspots of carbon loss between 1987–2017 using the dynamic global vegetation model LPJ-GUESS and by comparing past and present land use and land cover. We also link global consumption and production patterns to their environmental effects in Cambodia by mapping the countries to which land-use embedded carbon are exported. We find that natural forests have decreased from 54%–21% between 1987 and 2017, mainly for the expansion of farmland and orchards, translating into 300 million tons of carbon lost, with loss rates over twice as high within economic land concessions. China is the largest importer of embedded carbon, mainly for rubber and sugarcane from Chinese agribusinesses. Cambodian investors have also negatively affected carbon pools through export-oriented products like rubber. The combined understanding of environmental change and trade flows makes it possible to identify distant drivers of deforestation, which is important for crafting more environmentally and socially responsible policies on national and transnational scales.
Study on Over-erosion in Wire Electrical Discharge Machining of PCD Composite
Authors: Gao Changshui , Qiu Yi , Liu Zhuang , Wang Sheng
Published: March 2020

This paper has investigated the mechanism of over-erosion in WEDM of PCD composite. The result reveals that the over-erosion phenomenon cannot be avoided in the WEDM of PCD composite during fabrication of micro cutter. The reason of that is due to the different erosion rate of different elements in the composite. The discharge voltage, single-pulse energy and machining gap have influences on the size of over-erosion groove. A set of optimal parameters for minimum erosion groove were obtained through experiments.
Electrochemical Jet Machining of High Volume Fraction SiCp/Al Composite using Electrolyte of Sodium Chloride
Authors: Liu Zhuang , Guo Chao , Qiu Yi , Gao Changshui
Published: March 2020

This paper investigated electrochemical jet machining of high volume fraction SiCp/Al using NaCl electrolyte. The mechanism of material removal has been discussed according to electrochemical theory and properties of the material. Experimental results show that the entrance diameter of machined holes is almost 3-4 times larger than jet diameter at present conditions. Compared with 2mm gap distance, machining with 5mm gap didn’t show advantages on machining localization.
Flavor Analysis of Mrps Made from Different Enzymolysis Products Based on Electronic Nose and Electronic Tongue
Authors: Fan Xiaopan , Ding Li , Liu Hua , Liu Yiming , Liu Jianbo , Ma Lizhen
Published: March 2020

The effects of different enzymatic hydrolysis methods on the odor and taste of the Maillard reaction products of minced beef-bone protein were studied. Electronic nose and electronic tongue were applied to analyze the volatile substances and taste components. The results indicated that the Maillard reaction products (MRPs) had improved organoleptic and meaty characteristics, especially that of Pf and DE groups. Moreover, DE is the most potential treatment for producting meat flavor as it consume less energy source and improves production efficiency.
Opioid Spread Based on CA-ABM Model
Authors: Ji Tao , Zhou Xuehu , Lu Qianqian
Published: March 2020

Issue with opioid always arouses social attention. To deal with the opioid crisis in east America, this paper constructs Cellular Automata-Agent Based Model (CA-ABM) model to analyze the opioid spread of five states and succeed in assessing the present situation along with estimating the future situation. Besides, a strategy has been set up to control the opioid spread. To be specific, with data, this paper summarizes the distribution of two kinds of opioid from year 2010 to 2017, and then establishes a CA-ABM model considering history, neighboring and socio-economic factors to predict the opioid spread next year with highly accuracy. It vividly shows the opioid spread through years. Having a general idea of the spread of opioid, this paper comes up with strategies to ease the opioid crisis, succeeding in offering guidance for those five states.
Detection and Identification the Human Surface Electromyogra Signal
Authors: Yang Guobiao , Sun Zhenyuan , Wang Zhao , Sun Gangdong
Published: March 2020

The pre-amplifier circuit in this design uses the INA 128. In order to make the collected signal more authentic and eliminate the influence of the interference signal, a 50Hz industrial sink-wave circuit and a band pass filter circuit are designed in the subsequent circuit. And then, a secondary amplification was also used to make the A/D chip work smoothly. The designed circuit was simulated by Multisim test. The results obtained fully meet the expected requirements. Finally, the hardware circuit is built, and the real-time acquisition of electromyogram signal is realized. Based on the above equipment, time domain and frequency domain analysis of the collected electromyogram signal are carried out. The obtained test results conform to the general spectrum characteristics of the electromyogram signal, the frequency range is mainly concentrated at 0Hz -500 Hz, and the amplitude is relatively high in the range of 50Hz -200 Hz. The experimental results show that the relationship between the amplitude of the force stimulus and the amplitude of the electromyogram signal is positive, which verifies the accuracy of the test system design.
Analysis on Balance Improvement of Cross Grate Cooler Assembly Production Line Based on MOD Method
Authors: Guo Yue , Feng Xiwen
Published: March 2020

Based on the principle of production line balance and TOC theory, the problems of low production balance rate and long product delivery time of assembly line are solved based on MOD method. Mainly uses the TOC theory to carry on the analysis to the bottleneck process, carries on the standardization improvement to the bottleneck process through the MOD method; Find out the non-standard and unnecessary actions, and use the action economic principle to improve these non-standard actions to make them standardized and standardized. After improvement, the balance rate of the production line was increased from 30.9% to 38.7%.
Research on the Development of New Technologies Based on New Magnetic Material Technology Entrepreneurship
Authors: Wei Wei , Zhang Jing
Published: March 2020

New materials, especially those related to magnetic materials, face the contradiction between the company’s own scale and central tasks. It is necessary to formulate reasonable product research and development measures and overall corporate strategy to ensure that enterprises can smoothly pass this high risk and high. The period of growth. Based on the main business of magnetic materials companies and the related characteristics of magnetic materials, this paper analyses the special characteristics of the new magnetic materials enterprises in the entrepreneurial stage, and at the same time formulates the overall strategy and functional strategies of the entrepreneurial stage according to the development of the enterprise to help the new innovative magnetic materials. The company smoothly passed the stage of entrepreneurial development.
Thermal Transport of Tin Dioxide Nanowires
Authors: Wang Xiaomeng , Xu Dongyan , He Jin
Published: March 2020

Temperature dependent thermal conductivities of individual Tin Dioxide (SnO2) nanowires have been studied via a suspended microdevice method. Thermal conductivity of SnO2 nanowires is found to be less than 20% of the bulk value in the whole measurement temperature range and the peak shifts to a higher temperature about 110 K compared with that of its bulk counterpart at around 26 K. This study demonstrated experimental results and analysis of thermal transport property of onedimensional SnO2 nanostructure.
Cellulose Material with Humidity Color Responsiveness
Authors: Xu Chuanqi , Zheng Songming , Zhang Kaiwei , Yang Xin , Li Ranran , Liu Yuqing
Published: March 2020

In nature, there are a large number of structural color applications. To biobionic nature’s structural color and response to environmental stimuli color changes, jute is prepared by acid hydrolysis into cellulose nanocrystals, and then by simply introducing small molecules as plasticizers and moisture absorbers to prepare a highly flexible, Controlled rainbow colors and multi-stimulating cellulose nanocrystals (CNC). The presence of the additive polyglycol (PEG) doesn’t prevent the self-assembly of CNC in the aqueous solution, but will result in increased mechanical toughness, which makes it possible to obtain a structurally adjustable independent Rainbow CNC color. The surface charge density of CNC is an important factor in controlling the spacing dimension of the chiral nematic structure of the dry solid CNC film, which can smoothly change the color of the structure by adjusting the chiral nematic structure. It is worth noting that the change is reversible, with alternating relative humidity between 40% and 100%, a discoloration material that makes biofilms widely used in color-coded sensors, anti-fouling techniques and decorative coatings.
Research on Residual Stress Simulation on High Performance Aluminum Alloy Manufacturing
Authors: Wang Pengcheng , Wang Feng , Pan Yongzhi , Wang Shuai , Fu Xiuli
Published: March 2020

High-performance manufacturing is an integrated manufacturing of surface integrity and anti-fatigue surface strengthening to improve the service performance of key components. The stress concentration, fatigue failure and poor reliability cause by traditional processing have become technical bottlenecks restricting the development of industry. In order to research the influence of high performance manufacturing on the fatigue performance of workpieces, the residual stress distribution of 7050 aluminum alloy high performance manufacturing was studied by simulation. The stress layer on the surface of the workpiece was mainly tensile stress which was formed during cutting process, and it implied that the fatigue resistance of the workpiece was not effectively improved. The ultrasonic rolling strengthening treatment can effectively eliminate the residual tool marks and stress concentration. It was noted that stress layer of ultrasonic rolling was deeper than the cutting process, and the stress layer was mainly composed of residual compressive stress. The residual stress increased first and then decreased with the increased of depth, which can significantly improve the fatigue performance and service life of the workpiece.
Effect of Al3+ Doping on the Properties of LiMn2O4 Cathode Material
Authors: Li Lin , Zheng Wei , Zhao Rongfei , Cheng Jinsong
Published: March 2020

Spinel phase LiAlxMn2-xO4 were prepared by a rheological phase reaction method. The samples were characterized by X-ray diffraction, scanning electron microscopy, AC impedance, and galvanostatic charge/discharge profile measurement. These results showed that the LiAlxMn2-xO4 had better cycling performance than pure LiMn2O4. Among all the doped samples, the LiAlxMn2-xO4 sample showed the best cycling performance, the initial discharge capacitiy is 132 mAh g−1, and the discharge capacity of 115 mAh g−1 at a rate of 1 C after 100 cycles and capacity retention of 87.1% after 100 cycles (1C=148 mA g−1). Rate performance and electrochemical impedance spectroscopy measurements showed that the Al-doped spinels had high rate capability and reversible cycling performance.
Stiffness Simulation of Joints of Large Manipulators based on Cam Torsion Spring Mechanisms
Authors: Hua Gengpai
Published: March 2020

There is elasticity in the joint of large manipulators, and the transfer torque is related to the relative rotation angle between input and output terminal. In order to simulate this stiffness characteristic in the test experiment, a cam torsion spring mechanism and its design method are proposed in this paper. The mechanism can simulate arbitrary angle-torque curve by directional design. After the necessary analysis and design, the actual characteristics of the mechanism are tested by experiments, which proves that the mechanism can simulate the stiffness characteristics of joints of large manipulator arm very well.
Study on Mean Time Between Failures Prediction Algorithms Based on Weibull Distribution
Authors: wang Peitong , Fan Jinwei , Li Zhongsheng
Published: March 2020

The system reliability is significant importance because it is involved into most stages of the whole life-cycle of product. According to the existing literature, MTBF is the most frequently used index to indicate the system reliability. However, in engineering calculation, early failure data are always involved directly into MTBF’s estimation, which results in that the estimated MTBF is always smaller than the actual MTBF, especially for the small samples. In order to alleviate this issue, the paper presents three integration algorithms to reconstruct PDF based on Weibull distribution, by reallocating the early failure data. Then relevant prediction expressions are derived by the reconstructed PDFs. Eventually, three new prediction methods are illustrated by a real example. As a result, the prediction value of Method 3 is very close to the actual observed value, moreover the prediction deviation rate is only 5.1%, which proves the proposed algorithm is reasonable. Finally the proposed methods are suggested applying to other distribution patterns.
Decision Research on Patent Licensing of Original Manufacturers and Technology Innovation of Independent Remanufacturers
Authors: Sheng Xin
Published: March 2020

The innovation of remanufacturing technology is an effective way to keep the cost advantage of reproducts, and patent licensing facilitates the production of reproducts by independent remanufacturers. Considering people’s different preferences for reproducts and new products, we first construct an evolutionary game composed of original manufacturers and independent remanufacturers based on the theory and method of evolutionary game. Next, we study the evolutionary stable point and the influence factors of patent licensing and remanufacturing technology innovation strategy selection by Jacobian matrix. Finally, the model conclusion is verified by numerical analysis. The research shows that when the innovation level of remanufacturing technology is within a certain threshold, independent remanufacturers ultimately choose the technology innovation strategy, while original manufacturers always ultimately choose the patent licensing strategy and it is not affected by the innovation level of remanufacturing technology.
Electrochemical performance of Ce/Ni-MOFs electrode
Authors: Sha Zhiyuan
Published: March 2020

A novel electrochemical capacitor electrode based on Ce/Ni-MOFs was prepared. During this process, we introduced hydrothermal method. However improper reaction conditions would cause the collapse of crystal structure which will do harm to the performance of the electrode. We explored the option reaction conditions including temperature and end urance time. Under the option condition, we performed a series of electrochemical testing and surface characterizations to explore and electrochemical performance and cycle life. We obtain the Ce/Ni-MOF electrode with the capacitance of 584F/g and the retention of 95.5% after 1000 cycles of charging and discharging test. This indicate that Ce/Ni-MOFs might be a promising supercapacitor electrode for future use.
Available Evidence in Application of Paper Mulberry in Animals Breeding
Authors: Du Ruihuan , Zheng Baiqin , Duan Xiaoran , Xiang Aili , Huo Luman , Li Aijun , Zhang Guosheng , Dong Lixue
Published: March 2020

As a new protein feedstuff, paper mulberry has the characteristics abundant nutrition, high protein content and good palatability, and has great development potential. In this paper, the feeding value of mulberry, the feeding method and the application in animal feeding are reviewed, which provides reference for the wide application of mulberry in animals breeding.
Analysis of the Impact of Buffers of Baseband Equipment on Transmission Data
Authors: Zhang Di , Yuan Binwen , Tan Bingyu
Published: March 2020

In the high-rate FM baseband equipment test, there is a packet loss in the telemetry data sent by the central unit to the center. Combined with the previous high-rate FM baseband equipment transmission data, preliminary analysis, the buffer size of the baseband equipment affects the time gap between the central machine and the telemetry data sent to the center, resulting in the phenomenon of packet loss. This paper mainly studies the influence of different buffer sizes on the transmission data gap and data volume, and then calculates the optimal baseband device buffer size without affecting the central machine transmission data, which provides a reference for practical engineering.
Research on Wireless Transmission Method of Acoustic Waves in Metal Pipelines
Authors: Zheng Junjie , Jia Shengyao , Li Qing
Published: March 2020

In this paper, an on-line detection device capable of simultaneously detecting the concentration of methane in the shallow gas and the physical and mechanical properties of the soil is designed, and the acoustic transducer is used to wirelessly transmit data by using the metal probes in front of the two parts. The experimental results show that data communication can be performed very well.
Study on energy consumption index system and calculation method of highway transportation infrastructure in Qinghai Province
Authors: Qi Zhaoyu , Zheng Tianli , Liu Ning , Zhong Haiyan
Published: March 2020

In view of the lack of mandatory statistics on energy consumption of transportation infrastructure at the national level, the energy consumption index system of Qinghai highway transportation infrastructure was established based on the analytic hierarchy process by using fuzzy synthetic evaluation method. And the calculation method of Qinghai highway transportation infrastructure was established based on the calculation results of the unit energy consumption coefficient of each classification index. This work offers reference for the rapid evaluation of the energy consumption of Qinghai highway transportation infrastructure.
The Influence of the Solar Flywheel Energy Storage Control System Based on the Improved Disturbance Observation Method on the Improvement of New Energy Efficiency
Authors: Zhu Leyu
Published: March 2020

The purpose of this study was to improve the utilization efficiency of solar energy, and accelerate the innovation and development of solar flywheel energy storage control system, so as to enhance the utilization value of new energy. Firstly, the definition and working method of flywheel energy storage control system were described, and the characteristics of flywheel energy storage control system were introduced in detail. Secondly, the concept and working principle of solar flywheel energy storage control system were introduced, and the principle and calculation method of perturbation and observation method (P&O) were described in detail. Finally, the improved P&O based on particle swarm optimization (PSO) algorithm was described in detail, and its principle and operation methods were explained. The research results show that the biggest characteristic of flywheel energy storage device is that it has no pollution to the environment, the energy stored per unit area is large, and the efficiency of converting it into electric energy is very high, which can be used for a long time. The working property of solar energy storage system is the introduction, maintenance, and output of electric energy. In order to obtain the best tracking data, the flywheel energy storage control system must control the disturbance amplitude and time accurately and make a comprehensive choice. The P&O improved by PSO algorithm is applied to the flywheel energy storage control system, and the experience time to reach the maximum efficiency position is relatively shortened. When the system’s derived power reaches the balance, the variation of wave shape in the improved dynamic observation method is also relatively reduced.
Experimental Study on Peak-shaving Ability of a 330MW Thermal Power Unit in Heating State
Authors: Zhu Lingkai , Zheng Wei , Wang Qian , Guo Junshan , Han Yue , Shang Panfeng , Zhang Yanpeng , Lao Jinxu , Liu Jun
Published: March 2020

The peak-shaving capacity of thermal power units is affected by the amount of steam extracted, so the design of the working condition diagram of heat supply can not accurately reflect the actual peak-shaving performance of units.In order to solve the above problems, this paper takes a 330MW thermal power unit as an example, gets the actual peak-shaving upper and lower limits of the unit under different extraction flow rates through peak-shaving capacity test, and compares them with the design heating working diagram, and analyses the reasons for the deviation of the actual peak-shaving capacity and design value, so as to provide reference for the operation and dispatch of the power plant and help power plants to better participate in peak shaving of ancillary services.
An Improved TLD Target Tracking Algorithm Combined with Kernel Correlation Filtering
Authors: Duan Haoyu , Zhang Yumin , Sheng Wei , Chen Xin , Ren Jianxin
Published: March 2020

Target continuous tracking problem is an important research topic in the field of computer vision. To conquer difficulties of target loss under complex situation, size changes and illumination changes, an improved tracking module is designed via combining tracking module in TLD with KCF (Kernelized Correlation Filters). The comparison between TLD and the proposed algorithm shows that the performance of the latter is improved in tracking accuracy. Under complex situation of target occlusion, scale change, illumination change, etc., algorithm presented can output the tracking results stably, which is more robust and more suitable for long-term target tracking.
An Internal Coupled-Feed UHF RFID Tag Antenna with CP and Metal-Mountable Advantage
Authors: Zhuo Lan , Han Hongzu , Zhao Hongtu , Xun Shen
Published: March 2020

An internal coupled-feed microstrip RFID tag antenna for UHF band is presented in this article. To achieve a compact size, the orthogonal cross-slot is etched on the radiation patch, reducing antenna size and providing feeding space for L-shaped feedline. In order to meet the metal-mountable advantage and the low-profile size requirement, the ends of L-shaped feedline are connected with ground through metal-via. By optimizing the size of L-shaped feedline, the expected input impedance of the proposed tag antenna can be obtained easily. Moreover, the target band of circular polarization (CP) can be covered by optimizing the length of slits, which is embedded in the four corners of the radiation patch. The measured 3-dB Power Reflection Coefficient (PRC) bandwidth of the proposed tag antenna is 98 MHz (from 840 to 938 MHz), and its 3-dB axial-ratio (AR) bandwidth is 7 MHz (from 920 to 927 MHz). Further test results demonstrate that the tag antenna can provide better gain and reading range when mounted on a metal plate.
Research on Applicability of Sensitivity Table Method in Optical System Alignment
Authors: Wu Wei , Shang Jianzhong , Cao Yujun , Chen Chunqi , Zhou Jun
Published: March 2020

Sensitivity table method (STM), which is a most widely used computer-aided alignment technology in optical system alignment, faces a problem that is how to determine the correctness of the applied object and established sensitivity table. In order to solve the problem, two criteria for applying STM correctly are concluded, one is determining the linearity relation between misalignments and wavefront aberration, the other one is establishing the effective sensitivity table by monitoring its condition number. Two optical systems are tested in this paper, and experimental results show the correctness of the proposed method.
The design of an equipment induction maintenance system based on AR technology
Authors: Wu Yong , Xu Jianguo , Li lintao , Ge Duode , Zhang Jun
Published: March 2020

Aiming at the problems of short time, heavy task, difficulty and few professional maintenance personnel, a set of induced maintenance system based on augmented reality technology is developed. Based on AR technology, the research and development of a kind of equipment induction maintenance system is to integrate hardware and software, using augmented reality, human-computer natural interaction, virtual prototype and interactive electronic manual and other technologies, to provide an operating environment for maintenance personnel to combine virtual information assisted guidance and physical operation synchronously, and to guide maintenance personnel more efficiently for the realization of “Human-centered” maintenance It is of great significance to complete the maintenance task.
The Common Faults and Analysis of Hydrogen Compressor
Authors: Han Yanlu , Wang Jing , Liu Hai , Zhang Zhengguo
Published: March 2020

The hydrogen compressor plays an important role in the process of petrochemical gasoline hydrofining, coal chemical methanol syngas transmission. Once the hydrogen compressor breakdown, it will cause all the plant stopped and even lead to gas leakage, fire, explosion and other accidents which causing significant economic losses. In this paper, the hydrogen compressor is taken as a research object. We enumerate some common faults that which often occurs in the compressor operation, a detailed analysis is carried out and corresponding maintenance suggestions are put forward. We provide reference for the safety person in charge of chemical enterprises and equipment operators.
Bus ultra-short-term load forecasting considering the impact of distributed photovoltaic power supply
Authors: Yu Changyong , Zhang Mingli , Hu Qiankun , Zhu Heyan , Jiang Li , Nan Zhe , Li Fang
Published: March 2020

Bus load base is small and volatile, so it is difficult to predict ultra-short-term load. Distributed photovoltaic power supply connected to bus power supply area further increases the uncertainty of bus load and directly affects the prediction accuracy. Aiming at the ultra-short-term load forecasting problem of bus with photovoltaic power supply under complex weather conditions, a method of bus ultra-short-term load forecasting based on feature selection and XGBoost is proposed. Firstly, a high-dimensional feature set is constructed with various influencing factors, and the XGBoost predictor is trained with the original feature set in the typical meteorological day historical data such as rainy and sunny days, and the degree of response between the bus load and the multi-factor is determined during the training process. Then, the MAPE value is used as the evaluation index. Forward search is used to select features to determine the optimal feature subsets of different typical weather day predictors. Finally, according to the selected optimal feature subsets, the optimal XGBoost prediction model for different weather days are established to predict the bus output of different weather days. Experiments on bus data with distributed photovoltaic in a certain area show that the new prediction model has higher prediction accuracy.