bluuebunny/crossref_metadata_2025 huggingface dataset:
Green solvents and Ultrasound-Assisted Extraction of bioactive orange (Citrus sinensis) peel compounds
Authors: Montero-Calderon Abigail , Cortes Clara , Zulueta Ana , Frigola Ana , Esteve Maria J.
Published: November 2019

Byproducts such as orange peel have potential uses because of their bioactive compounds, which are important for their potential to reduce the risk factors of diseases caused by aging. The lack of effective techniques and the high levels of pollution produced by the conventional extraction of bioactive compounds using organic solvents have highlighted the need to enhance the ‘green chemistry’ trend. This study evaluates the use of ultrasound to extract bioactive compounds from orange peel. The antioxidant capacity, phenolic content, ascorbic acid, total carotenoids, and HPLC profile of phenolic compounds from orange peel extracts were obtained by a physicochemical evaluation. The results demonstrate that the optimal conditions for the ultrasound-assisted extraction of bioactive orange peel compounds were a power of 400 W, a time of 30 min, and 50% ethanol in water. These conditions were used to obtain a total carotenoid concentration of 0.63 mg ß-carotene/100 g, vitamin C concentration of 53.78 mg AA/100 g, phenolic concentration of 105.96 mg GAE/100 g, and antioxidant capacity of ORAC = 27.08 mM TE and TEAC = 3.97 mM TE. The major phenolic compound identified in all orange peel extracts was hesperidin, with a maximum concentration of 113.03 ± 0.08 mg/100 g.
Steric and electronic modulation of iron catalysts as a route to remarkably high molecular weight linear polyethylenes
Authors: Zhang Randi , Han Mingyang , Ma Yanping , Solan Gregory A. , Liang Tongling , Sun Wen-Hua
Published: November 2019

The depictedN,N,N-iron(ii) chloride precatalysts, upon activation with either MAO or MMAO, not only display excellent thermal stability but are also capable of generating exceptionally high molecular weight linear polyethylenes.
Themed issues on per- and polyfluoroalkyl substances
Authors: Ahrens Lutz , Benskin Jonathan P. , Cousins Ian T. , Crimi Michelle , Higgins Christopher P.
Published: November 2019

Guest editors Lutz Ahrens, Jonathan Benskin, Ian Cousins, Michelle Crimi and Christopher Higgins introduce the “Per- and polyfluoroalkyl substances (PFASs)” themed issue.
Black soybean seed coat polyphenols promote nitric oxide production in the aorta through glucagon-like peptide-1 secretion from the intestinal cells
Authors: Domae Chiaki , Nanba Fumio , Maruo Toshinari , Suzuki Toshio , Ashida Hitoshi , Yamashita Yoko
Published: November 2019

Black soybean seed coat polyphenols were reported to possess NO Production.
Ethyl-for-methyl substitution enhances the subtype specificity of mecamylamine analogues
Authors: Mangan David , McNabola Neasa , Clark Emily H. , Bermudez Isabel , Wonnacott Susan , Southern J. Mike
Published: November 2019

Enhanced activity and selectivity towards either α3β2 or α2β4 nicotinic acetylcholine receptors compared to parent compound.
Molecular replication using covalent base-pairs with traceless linkers
Authors: Núñez-Villanueva Diego , Hunter Christopher A.
Published: November 2019

Covalent template-directed synthesis was carried out using an oligomeric template to produce identical copy strands in iterative rounds of replication.
Fe3O4@BNPs@SiO2–SO3H as a highly chemoselective heterogeneous magnetic nanocatalyst for the oxidation of sulfides to sulfoxides or sulfones
Authors: Ghanbari Kermanshahi Mohammad , Bahrami Kiumars
Published: November 2019

To achieve the green chemistry goals and importance of separation and recycling of catalyst from the reaction medium, Fe3O4@BNPs@SiO2–SO3H is introduced as a novel heterogeneous nanocatalyst for the oxidation of sulfides to sulfoxides or sulfones.
Stability of monometallic Pt and Ru supported on hierarchical HZSM-5 nanosheets for hydrodeoxygenation of lignin-derived compounds in the aqueous phase
Authors: Salakhum Saros , Saenluang Kachaporn , Wattanakit Chularat
Published: November 2019

Demonstrating the stability of metals supported on hierarchical HZSM-5 nanosheets and its application in the hydrodeoxygenation of lignin-derived compounds in the aqueous phase.
MoC based Mott–Schottky electrocatalyst for boosting the hydrogen evolution reaction performance
Authors: Ji Xinyang , Wang Kaixuan , Zhang Yao , Sun Haohao , Zhang Yuanyuan , Ma Tiange , Ma Zhuo , Hu PingAn , Qiu Yunfeng
Published: November 2019

Searching for promising HER electrocatalysts is an urgent task for the practical application of hydrogen production by water electrolysis.
Behaviour of flexible superhydrophobic striped surfaces during (electro-)wetting of a sessile drop
Authors: Dev Arvind Arun , Dey Ranabir , Mugele Frieder
Published: November 2019

Deformation of lamellae constituting a soft striped superhydrophobic surface during spreading of a droplet under (electro-)wetting (EW).
Theory and practice of origami in science
Authors: Santangelo Christian D.
Published: November 2019

No longer just the purview of artists and enthusiasts, origami engineering has emerged as a potentially powerful tool to create three dimensional structures on disparate scales.
Effect of substrate wettability and flexibility on the initial stage of water vapor condensation
Authors: Che Qi , Lu Yongjun , Wang Fenghui , Zhao Xiang
Published: November 2019

The condensation mode and heat transfer efficiency are significantly affected by substrate wettability and flexibility in the initial stage of vapor condensation.
Realization of the Li+ domain diffusion effect via constructing molecular brushes on the LLZTO surface and its application in all-solid-state lithium batteries
Authors: Li Wenwen , Sun Changzhi , Jin Jun , Li Yanpei , Chen Chunhua , Wen Zhaoyin
Published: November 2019

Realization of the fast Li+ domain diffusion effect via constructing molecular brushes on the LLZTO improves the ionic conductivity of electrolytes and electrochemical performance of solid-state lithium batteries.
Bulky, dendronized iridium complexes and their photoluminescence
Authors: Zhang Guang , Hermerschmidt Felix , Pramanik Anup , Schollmeyer Dieter , Baumgarten Martin , Sarkar Pranab , List-Kratochvil Emil J. W. , Müllen Klaus
Published: November 2019

The emission efficiencies of bulky phosphorescent emitters are reduced by elongated metal–ligand bonds, which provides insights for designing better emitters.
Recent progress of III–V quantum dot infrared photodetectors on silicon
Authors: Ren Aobo , Yuan Liming , Xu Hao , Wu Jiang , Wang Zhiming
Published: November 2019

Heterogeneous integration of III–V quantum dots on Si substrates for infrared photodetection is reviewed, focusing on direct epitaxial growth and bonding techniques over the last few years.
Emerging roles of the long non-coding RNA 01296/microRNA-143-3p/MSI2 axis in development of thyroid cancer
Authors: Wang Zheng-Lin , Wang Cong , Liu Wei , Ai Zhi-Long
Published: November 2019

Thyroid cancer (TC) is an endocrine malignancy with rising incidence. Long non-coding RNAs (lncRNAs) can serve as diagnostic and prognostic biomarkers for TC. Thus, we studied roles of LINC01296 in TC progression. Initially, the Gene Expression Omnibus (GEO) database was used to detect the differentially expressed genes in human TC samples and the potential mechanism. Expression of LINC01296 and miR-143-3p in TC tissues and cells was measured. The transfection of TC cells was conducted with si-LINC01296, si-Musashi 2 (MSI2), mimic or inhibitor of miR-143-3p to determine their effects on TC cell proliferation, migration, invasion, apoptosis and the AKT/STAT3 signaling pathway. Finally, in vivo assay was performed to verify role of miR-143-3p in tumorigenesis of TC cells in nude mice. LINC01296 was predicted to bind to miR-143-3p to modulate MSI2 expression, thus regulating the occurrence and development of TC. LINC01296 was up-regulated, while miR-143-3p was down-regulated in TC cells and tissues. LNC01296 specifically bound to miR-143-3p and MSI2 was a target of miR-143-3p. Besides, LINC01296 silencing or miR-143-3p overexpression inhibited migration, invasion, proliferation and advanced apoptosis of TC cells. Additionally, silenced LINC01296 or overexpressed miR-143-3p reduced phosphorylated STAT3/STAT3, phosphorylated AKT/AKT, B-cell lymphoma-2 (Bcl-2) and CyclinD1 levels but elevated BCL2-associated X (Bax), Cleaved Caspase3 and Caspase3 levels. Also, tumorigenesis of TC cells in nude mice was inhibited with the silencing of LINC01296. In summary, LINC01296/miR-143-3p/MSI2 axis regulated development of TC through the AKT/STAT3 signaling pathway.
Systematic Evaluation of Self-Reported Hearing Ability in Six Dimensions Before and After a Hearing Aid Trial
Authors: de Ronde-Brons Inge , Soede Wim , Dreschler Wouter
Published: November 2019

Purpose

The aim of the study was to evaluate the application of a modified version of the Amsterdam Inventory for Auditory Disabilities and Handicap to inventory self-reported hearing difficulties pre and post hearing aid fitting in 6 dimensions: detection, speech in silence, speech in noise, localization, discrimination, and noise tolerance.

Method

Questionnaires pre and post hearing aid fitting were collected during regular practice of hearing aid provision. Data of 740 subjects are presented; 337 already used hearing aids, and 403 were new users.

Results

Group-averaged scores improved due to hearing aid fitting for all 6 dimensions. Based on a criterion previously defined for the Amsterdam Inventory for Auditory Disabilities and Handicap questionnaire, 66% of subjects had a significant individual improvement in sum score. Experienced users showed lower improvement in scores, whereas their aided prescores were, on average, not better than the (unaided) score of 1st users.

Conclusions

The questionnaire can be applied as a structured approach to inventory hearing problems in 6 dimensions prior to hearing aid fitting and to systematically evaluate the effects of hearing aid fitting after a trial period. The data presented here can serve as normative data for comparison of individual subjects in clinical practice.
Orographic effect in cosmic rays observing
Authors: Balabin Yury
Published: November 2019

The Baksan neutron monitor (NM) is installed at the Baksan neutrino observatory, the Northern Caucasus, which is located at the bottom of the Baksan gorge, at height of 1700 m above sea level. The cosmic rays flux recorded at the ground level depends on the amount of the substance (air), through which the particles are passing, from the uppermost layers of the atmosphere to a cosmic ray detector. So, besides the cosmic rays flux data, the station records pressure; the pressure meter recordings interval is 1 minute, like that of the cosmic rays. The perennial barometric data have been analysed to show that at the Baksan station one can often observe a daily pressure variation that is related to the topography features. In general, the local conditions (wind, local orographic effect) result in pressure variations, which do not occur in the cosmic rays, because they do not change the thickness of the atmosphere but result from the effect of the ground level. The barometric variation discovered is not so big (about 1 mb), but is also synchronously observed in the cosmic rays. It means that the pressure variation is not a local phenomenon. In this case, the NM detects the amount of the substance in the atmosphere, showing that pressure changes are not due to dynamic reasons (the Bernoulli effect) and it is the atmosphere strata that changes in reality. Hence, the orographic effect covers a significant part of the troposphere, resulting in the change of the atmosphere strata located over the NM. No similar pressure variation is observed in other NMs.
Complex analysis of pre-seismic geoacoustic and electromagnetic emission signals
Authors: Lukovenkova Olga , Solodchuk Alexandra , Tristanov Alexander , Malkin Evgeniy
Published: November 2019

The article describes the results of complex analysis of pre-seismic signals of electromagnetic and geoacoustic radiation. We analyzed the frequency content of single sferics and geoacoustic impulses recorded before the Zhupanov earthquake that occurred on January 30, 2016. The signals were analyzed using sparse approximation method, in particular Adaptive Matched Pursuit. Background signals were studied together with pre-seismic ones. Distributions of frequencies, that are part of background and pre-seismic signals, were compared. Differences in the frequency content of pre-seismic sferics and geoacoustic impulses were found. The revealed features of pre-seismic signals in the future can be used in the design of systems for monitoring, forecasting and prevention of natural disasters. The research was supported by Russian Science Foundation (project No. 18-11-00087).
Modeling of downward longwave radiation and radiative cooling potential in China
Authors: Chang Kai , Zhang Qingyuan
Published: November 2019

The information on downward longwave (LW) radiation is necessary for the design of the passive cooling system of buildings. Because the measured LW radiation data are not available in most locations, few studies have focused on the modeling of LW radiation in China. In this study, empirical models for estimating LW radiation were proposed under all-sky conditions based on the meteorological parameters such as the ambient dry-bulb temperature, water vapor pressure, and relative humidity, which can be classified into four cases: All day, nighttime, and daytimes with and without considering the cloud modification factor. The proposed models performed are well compared with the existing models. The LW radiation datasets for 351 locations of China were developed using the proposed model for all the day based on the typical meteorological year. Moreover, the distribution map of radiative cooling potential in July was created using the proposed model for the nighttime, which can provide a valuable reference for building cooling design.
Decelerated lattice excitation and absence of bulk phonon modes at surfaces: Ultra-fast electron diffraction from Bi(111) surface upon fs-laser excitation
Authors: Tinnemann V. , Streubühr C. , Hafke B. , Witte T. , Kalus A. , Hanisch-Blicharski A. , Ligges M. , Zhou P. , von der Linde D. , Bovensiepen U. , Horn-von Hoegen M.
Published: November 2019

Ultrafast reflection high-energy electron diffraction is employed to follow the lattice excitation of a Bi(111) surface upon irradiation with a femtosecond laser pulse. The thermal motion of the atoms is analyzed through the Debye–Waller effect. While the Bi bulk is heated on time scales of 2 to 4 ps, we observe that the excitation of vibrational motion of the surface atoms occurs much slower with a time constant of 12 ps. This transient nonequilibrium situation is attributed to the weak coupling between bulk and surface phonon modes which hampers the energy flow between the two subsystems. From the absence of a fast component in the transient diffraction intensity, it is in addition concluded that truncated bulk phonon modes are absent at the surface.
Patterns of health service utilisation among the Australian population with cancer compared with the general population
Authors: Ng Huah Shin , Koczwara Bogda , Roder David , Chan Raymond Javan , Vitry Agnes
Published: November 2019

Objective
The aim of this study was to describe patterns of health service utilisation among the Australian population with cancer compared with the general population.

Methods
Data for all respondents aged ≥25 years from two successive National Health Surveys conducted between 2011 and 2014 were analysed. Respondents with a history of cancer were identified as the cancer group, whereas all other respondents who did not report having had a cancer were included in the non-cancer control group. Comparisons were made between the two groups using logistic regression models.

Results
The population with cancer was more likely to report having consulted their general practitioner, specialist, chemist, dietician, naturopath, nurse, optometrist, dentist, audiologist and other health professionals than the non-cancer population. The cancer population was also more likely to be admitted to hospital and to have visited an out-patient clinic, emergency department and day clinic. The presence of comorbidity and a current cancer were associated with a greater likelihood of receiving health services among the population with cancer.

Conclusion
The population with cancer used health services significantly more than the non-cancer population. Further studies are urgently needed to identify optimal approaches to delivery of care for this population, including barriers and enablers for their implementation.

What is known about the topic?
Multimorbidity is highly prevalent among the cancer population due to risk factors shared between cancer and other chronic diseases, and the development of new conditions resulting from cancer treatment and cancer complications. However, the Australian healthcare system is not set up optimally to address issues related to multimorbidity.

What does this paper add?
This study is the first step in quantifying health services use by the population with cancer compared with the general population without cancer. Cancer survivors have an increased need for specific health services, particularly among those with multimorbidity.

What are the implications for practitioners?
The development of integrated care models to manage multiple chronic diseases aligned with the Australian National Strategic Framework for Chronic Conditions is warranted. Further studies are urgently needed to identify optimal approaches to delivery of care for this population, including barriers and enablers for their implementation.
Effect of shipping on the distribution of trace elements and petroleum hydrocarbons in the coastal basins of Australia: a review
Authors: Jahan Sayka , Strezov Vladimir
Published: November 2019

This study surveyed levels of trace elements and hydrocarbon contamination in Australian seaport environments. Different activities contribute to discharges of trace elements and hydrocarbons into estuarine and marine environments. The elements of highest concern are As, Cu, Pb, Zn and Ni at Port Derwent, with Cd, Zn, Cu and Pb at Port Kembla and Zn and Cu at Botany Bay all exceeding the Australia and New Zealand Environment Conservation Council standards. Concentrations of some elements (Zn, Pb and Cu) in sediments at Port Kembla, Port Newcastle and the Derwent estuary are also higher than the Inter Sediment Quality Guidelines. The concentrations of polychlorinated biphenyls, dichlorodiphenyltrichloroethane and chlordane in the aquatic biota at two eastern ports (Port Jackson, Port Brisbane) are also among the highest in Australia and similar areas around the world. These findings provide baseline information on which to prioritise further research and formulate strategies to improve water quality in Australian port environments.
Gintarasia and Xalocoa, two new genera to accommodate temperate to subtropical species in the predominantly tropical Graphidaceae (Ostropales, Ascomycota)
Authors: Kraichak Ekaphan , Parnmen Sittiporn , Lücking Robert , Lumbsch H. Thorsten
Published: November 2019

The phylogenetic placement of Chapsa lamellifera, C. megalophthalma and Diploschistes ocellatus was studied using a dataset of five genetic markers (mtSSU, nuLSU, RPB1, RPB2 and ITS). As extratropical species occurring in Australasia, C. lamellifera and C. megalophthalma differ from other species in that genus by having relatively large ascomata with muriform ascospores and complex chemistry of either the protocetraric or stictic acids chemosyndrome. D. ocellatus is unique within Diploschistes, in lacking lateral paraphyses and containing the norstictic acid chemosyndrome. Previous phylogenetic analysis gave inconclusive results regarding the phylogenetic position of these taxa, and hence in the present study, a larger sampling of molecular markers was employed. Our results demonstrated that the two Chapsa species and D. ocellatus are not part of their current genera. Consequently, the new genera Gintarasia Kraichak, Lücking & Lumbsch and Xalocoa Kraichak, Lücking & Lumbsch are described to accommodate these species. The new combinations Gintarasia lamellifera (Kantvilas & Vězda) Kraichak, Lücking & Lumbsch, G. lordhowensis (Mangold) Kraichak, Lücking & Lumbsch, G. megalophthalma (Müll. Arg.) Kraichak, Lücking & Lumbsch and Xalocoa ocellata (Vill.) Kraichak, Lücking & Lumbsch are also proposed.
On the cognitive grounding of agent-deprofiling constructions as a case of pretense constructions
Authors: Ruiz de Mendoza Ibáñez Francisco J. , Miró Sastre Ignasi
Published: November 2019

Agent-deprofiling constructions have the function of drawing the language user’s attention to the
non-agentive elements of a predication, while endowing one of these elements with agent-like qualities. Members of this family are
the inchoative, middle, instrument-subject, location-subject, and cause-subject constructions.
These constructions have been discussed in the literature, especially in projectionist accounts of language, without adequately
accounting for their relatedness, which in our view can best be done by investigating their grounding in cognition. The present
article addresses this issue by considering agent-deprofiling constructions as belonging to the class of what we term
pretense constructions. Pretense constructions provide non-descriptive, or re-construed, representations of
states, situations, or events. Because of their re-construed nature, which involves metaphor and/or metonymy, in these
configurations there is no one-to-one match between the semantic and syntactic functions of their elements. We discuss how this
reorganization of the semantic and syntactic function of constructional elements produces specific meaning implications that can
be motivated by underlying metaphoric and metonymic shifts, sometimes working in cooperation.
Do Prisoners Mentalize Differently? Investigating Attachment and Reflective Functioning in a Sample of Incarcerated Lebanese Men
Authors: Abi-Habib Rudy , Wehbe Nourhane , Badr Karim , Tohme Pia
Published: November 2019

Insecure attachment and deficits in mentalizing have been consistently found to be correlated with increased delinquency, conduct disorder and antisocial behaviors. This has been explained by a distancing from the other’s needs and feelings or by an incapacity to consider the effects of one’s behaviors on others. The current study is the first to investigate the association between attachment and mentalizing in a sample of 172 incarcerated Lebanese men, between the ages of 19 and 65, looking for predictors of regret towards the crime committed. Results suggested a significant correlation between insecure attachment and lower mentalizing capacities in our sample. Furthermore, deficits in mentalization, more specifically hypomentalizing strategies, were found to predict a lack of regret towards the crime committed. Findings are discussed within the attachment and mentalization framework, considering cross-cultural influences, guiding future intervention and prevention programs within Lebanese prisons and at-risk groups.
Optimization of the electrode drive pattern for imaging fascicular compound action potentials in peripheral nerve with fast neural electrical impedance tomography
Authors: Ravagli Enrico , Mastitskaya Svetlana , Thompson Nicole , Aristovich Kirill , Holder David
Published: November 2019

Objective: The main objective of this study was to investigate which injection pattern led to the best imaging of fascicular compound activity in fast neural EIT of peripheral nerve using an external cylindrical 2  ×  14-electrodes cuff. Specifically, the study addressed the identification of the optimal injection pattern and of the optimal region of the reconstructed volume to image fascicles. Approach: The effect of three different measurement protocol features (transversal/longitudinal injection, drive electrode spacing, referencing configuration) over imaging was investigated in simulation with the use of realistic impedance changes and noise levels. Image-based metrics were employed to evaluate the quality of the reconstructions over the reconstruction domain. The optimal electrode addressing protocol suggested by the simulations was validated in vivo on the tibial and peroneal fascicles of rat sciatic peripheral nerves (N  =  3) against MicroCT reference images. Main results: Injecting current transversally, with spacing of  ⩾4 electrodes apart (⩾100°) and single-ring referencing of measurements, led to the best overall localization when reconstructing on the edge of the electrode array closest to the reference. Longitudinal injection protocols led to a higher SNR of the reconstructed image but poorer localization. All in vivo EIT recordings had statistically significant impedance variations (p   <  0.05). Overall, fascicle center-of-mass (CoM) localization error was estimated at 141  ±  56 µm (−26  ±  94 µm and 5  ±  29° in radial coordinates). Significant difference was found (p   <  0.05) between mean angular location of the tibial and peroneal CoMs. Significance: This study gives the reader recommendations for performing fast neural EIT of fascicular compound activity using the most effective protocol features.
Locust: C++ software for simulation of RF detection
Authors: Ashtari Esfahani A , Böser S , Buzinsky N , Cervantes R , Claessens C , Viveiros L de , Fertl M , Formaggio J A , Gladstone L , Guigue M , Heeger K M , Johnston J , Jones A M , Kazkaz K , LaRoque B H , Lindman A , Machado E , Monreal B , Morrison E C , Nikkel J A , Novitski E , Oblath N S , Pettus W , Robertson R G H , Rybka G , Saldaña L , Sibille V , Schram M , Slocum P L , Sun Y-H , Tedeschi J R , Thümmler T , VanDevender B A , Wachtendonk M , Walter M , Weiss T E , Wendler T , Zayas E
Published: November 2019

The Locust simulation package is a new C++ software tool developed to simulate the measurement of time-varying electromagnetic fields using RF detection techniques. Modularity and flexibility allow for arbitrary input signals, while concurrently supporting tight integration with physics-based simulations as input. External signals driven by the Kassiopeia particle tracking package are discussed, demonstrating conditional feedback between Locust and Kassiopeia during software execution. An application of the simulation to the Project 8 experiment is described. Locust is publicly available at https://github.com/project8/locust_mc.
Electro-optical dual modulation on resistive switching behavior in BaTiO3/BiFeO3/TiO2 heterojunction*
Authors: Zhao Jia-Jia , Zhang Jin-Shuai , Zhang Feng , Wang Wei , He Hai-Rong , Cai Wang-Yang , Wang Jin
Published: November 2019

The novel BaTiO3/BiFeO3/TiO2 multilayer heterojunction is prepared on a fluorine-doped tinoxide (FTO) substrate by the sol–gel method. The results indicate that the Pt/BaTiO3/BiFeO3/TiO2/FTO heterojunction exhibits stable bipolar resistive switching characteristic, good retention performance, and reversal characteristic. Under different pulse voltages and light fields, four stable resistance states can also be realized. The analysis shows that the main conduction mechanism of the resistive switching characteristic of the heterojunction is space charge limited current (SCLC) effect. After the comprehensive analysis of the band diagram and the P–E ferroelectric property of the multilayer heterojunction, we can deduce that the SCLC is formed by the effect of the oxygen vacancy which is controlled by ferroelectric polarization-modulated change of interfacial barrier. And the effective photo-generated carrier also plays a regulatory role in resistance state (RS), which is formed by the double ferroelectric layer BaTiO3/BiFeO3 under different light fields. This research is of potential application values for developing the multi-state non-volatile resistance random access memory (RRAM) devices based on ferroelectric materials.
Cloud computing environment of waste heat driven air conditioning refrigeration system parameters optimization research
Authors: Shen Jianguang
Published: November 2019

In view of the poor performance of waste heat driven air conditioning refrigeration system parameter optimization problems such as study, through to the air conditioning heat driving power and refrigerating capacity parameters calculation, and set up according to the results of the calculation of waste heat driven air conditioning cooling parameters, after the complete parameter Settings, in order to guarantee the software and hardware of the air conditioning refrigeration system operation parameters for testing, according to the test results of waste heat driven air conditioning refrigerating system parameter adjustment and control, finally realize the cloud computing environment of waste heat driven air conditioning refrigeration system parameters optimization. Finally, it is confirmed by experiments that the parameter optimization method of waste heat driven air-conditioning and refrigeration system in the cloud computing environment has better optimization effect and can ensure the stable operation of the air-conditioning and refrigeration system.
HOMOM/PE Hybrid Algorithm Based Calculation on Ground-Wave of the HF Antennas over Irregular Terrain
Authors: Wang Li-feng , Zhang Zhi-gang
Published: November 2019

The parabolic equation model usually uses a gaussian pattern to fit the actual antenna’s pattern in free space to set the initial field, and then uses the image theory to deal with the effect of ground on the antennas. However, this method of setting the initial field cannot consider the specific HF antenna, and the image theory is only applicable to the radio wave propagation of antennas working in the microwave bands and above. The HF antenna is erected low, and the irregular terrain or the buildings around the antenna and their media parameters will affect the current distribution on the antenna, resulting in a large difference with the radiation pattern in the free space. The traditional method of fitting the pattern is no longer accurate. Aiming at the problem of radio wave propagation of HF antennas in the actual installation environment by parabolic equation method, a hybrid algorithm based on higher order-method of moment and parabolic equation method (HOMOM-PE) is proposed. The hybrid algorithm divides the whole calculation region into two regions, which is the inner zone and the outer zone. The inner zone is the zone that has a great influence on the antenna current distribution. In this area, HOMOM is used to model the antenna and the terrain together, and the influence of the complex terrain near the antenna on the antenna is strictly calculated. The PE algorithm is used to calculate the long-distance propagation, and the initial field data is derived from the electromagnetic vector distribution calculated in the inner region. The hybrid algorithm combines the antenna radiation and the wave propagation directly, which solves the problem of the initial field setting of the actual HF antenna under the complicated terrain conditions.
Isolation Improvement of an Overlapped Two-element MIMO Antenna
Authors: Li Wenchao , Qian Kewei
Published: November 2019

An overlapped two-element antenna structure with excellent compactness is proposed. Extraordinarily strong mutual coupling is effectively mitigated by a decoupling network with simple coupled microstrip lines connected to the antennas in shunt. Simulation example and results are demonstrated. The isolation improvement is better than 8 dB (from about 2 dB to over 10 dB) in most of the Wi-Fi 2.4 GHz band. Four lumped components networks are utilized to maintain the good impedance matching before and after decoupling, and the return loss is higher than 7 dB over the band of interest. Remarkable decrease in envelope correlation coefficient (ECC) in most of the working band is achieved. All these performances prove the presented antenna structure and decoupling scheme a promising option for those mobile terminals and wireless communication devices which have high data rate and compact volumes.
Feasibility study of microsatellite laser communication pointing system based on SEEOR technology
Authors: Chi Tie , Meng Lixin , Li Xiaoming , Zhang Lizhong
Published: November 2019

Satellite laser communication technology is a communication method that uses laser beam as information transmission carrier to transmit information data in space. It has many advantages such as large communication capacity, long transmission distance, high bandwidth, no spectrum permission, etc,widely used at present. The beacon light direction of its typical satellite laser communication system is realized by rough tracking servo turntable platform carrying optical components, so,there are a series of shortcomings such as turntable vibration, corner error and system inertia etc. Currently, a new technology, Non-Mechanical Beam Steering (NMBS) technology, in mid-wave infrared (MWIR) which has emerged, is expected to break through above shortcomings and provide possibilities for the transmission of beacon light in satellite laser communication. This paper focuses on the application of non-mechanical beam pointing technology in satellite laser communication system. We objectively analyzed the basic principles of the Non-Mechanical Beam Steering chip work, and the feasibility of using Non-Mechanical Beam Steering to transmit beacon light in satellite laser communication theoretically. It will open up a new way for the development of microsatellite laser communication technology in the future.
The Research on SAR ADC Integrated Circuit
Authors: Li Huailiang , Hu Jing
Published: November 2019

Successive approximation ADCs are widely used in low- and medium-speed applications due to their simpler structure, fewer analog blocks, smaller area, and lower power consumption. The successive approximation ADC mainly includes a sample and hold circuit, a DAC, a comparator, a clock circuit, and a SAR register. The rationality is verified by analyzing, designing and simulating each component circuit. For the research of ADC architecture, SAR type is selected and the key circuit is optimized. Using Cadence layout research, the digital part of ADC circuit can be simulated by Quartus II software and Modelsim software, and the hybrid circuit part is simulated by Candance software PSpice A/D. About layout design, some circuits can be further verified with Proteus software.
Method for delaying responsibility allocation of power grid infrastructure projects considering logical relationship between engineering processes
Authors: Zhang Jian , Jin Xianing , Yang Weihong , Fangxin AI , Zhanjun LI , Menglu LI , Gejirifu DE
Published: November 2019

Delaying responsibility allocation is one of the important contents in the construction management of power grid infrastructure projects. Due to the large investment in power grid infrastructure projects, long construction period and complicated operation procedures, many delays occurred during the construction process. Based on this, combined with the theory of time difference theory, this paper proposes a delay analysis method that considers the logical relationship between engineering processes. Secondly, the route time difference theorem is proposed, and the calculation steps and rules of the delay analysis method considering the logical relationship between engineering processes are given. Finally, the substation main structure construction project is selected as an example analysis, and compared with other methods, which effectively proved that the validity and feasibility of the proposed delay analysis method. The method of delay responsibility allocation proposed in this paper also provides ideas and directions for the subsequent research on delay assignment of similar construction projects.
Research on Mimic Defence Technology for Smart Unit Application Environment of Power Grid
Authors: Xi Zesheng , Zhang Bo , Sun Xin , Guan Xiaojuan
Published: November 2019

Aiming at the problem that the new network attack cannot be effectively defended at present, this paper proposes a framework of application-level mimic defense technology for smart grid units to solve the active attack defense problem of smart terminal units in the source grid environment. In this paper, the application security mimic defense architecture and interactive instruction level heterogeneous redundancy technology for smart grid units are studied to achieve universal and self-immune active immunity against grid application-level attacks. Furthermore, the dynamic change and heterogeneous redundancy characteristics of application level are constructed by mimetic defense technology. The risk and vulnerability of terminal application security vulnerabilities are actively hidden to actively avoid attacks, so as to enhance the active defense capability of industrial control terminal side of power grid.
Structure Optimization of Infrared Guidance Testing Device Based on Orthogonal Test
Authors: Zhang Bo , Wang Tao , Wang Zhuo
Published: November 2019

As an important weapon, missiles cannot be ignored in its fighting capacity. Therefore, the performance testing of the missile is particularly important. The hardware in the loop simulation test using missile test equipment on the ground can reduce the cost and improve the utilization rate; it is of great significance for the development of national defence construction. In the process of missile testing, the parts under the force of deformation will reduce the accuracy of the device, therefore the light pipe support needs sufficient strength and stiffness. In this paper, the finite element method was used to analyse the structure of the optical tube support seat, and the orthogonal test was used to optimize it. The test results were analysed by the range and variance to find out the optimal level combination and the significant influence of each factor in the result. At end, the appropriate structure of the program was determined. Comparing with the original structure, the strength and rigidity of the optical tube support seat have been greatly improved. Device accuracy has also been improved.
Study on Flatness Error Measurement System of Large Plane based on Laser Dots
Authors: Zha C Y , Wang X Y , Li L , Ye J J , Zhang Y H , Tan L B
Published: November 2019

In order to meet the needs of large plane’s flatness error measurement and aim at the time-consuming, laborious, expensive and inefficient problems, a flatness error measurement system of large plane based on laser dots was designed. The measurement system scanned the plane by the distance sensor which was driven by a double degree-of-freedom rotating platform. The Euler angles of distance sensor and the displacement data between the distance sensor and the measured plane were collected by the data acquisition card. Then the measurement system obtained the spatial coordinate values of laser dots through data processing. Eventually, the actual surface was reconstructed and the flatness error was calculated. The measurement results showed that the system could accurately reflect the actual surface and had great significance in promoting the industrial application of large plane’s flatness error detecting device.
Research on Single Phase Frequency Locking Technology Based on Second Order Generalized Integrator
Authors: Wang Kai , Zhao Huijuan , Huang Jingtao , Yang Jingxian , Zhang Shengguo , Li Lei
Published: November 2019

New energy generation has the characteristics of nonlinearity, randomness and fluctuation, which may cause many kinds of power quality problems, such as harmonics, voltage fluctuation, frequency offset and phase jump, so synchronization technology under disturbance becomes one of the key factors. At present, there are many summaries about three-phase phase-locked loop (PLL), three-phase frequency-locked loop (FLL) and single-phase PLL, but few summaries about single-phase FLL. Therefore, single-phase FLL based on second-order generalized integrator (SOGI) is summarized in this paper, including SOGI-FLL, cascaded SOGI-FLL (CSOGI-FLL) and multiple SOGI-FLL (MSOGI-FLL).The simulation models are established in Matlab/Simulink. The performance of FLLs are compared with square error integral index (ISE), maximum frequency deviation and adjusting time in ideal condition, voltage sag condition, frequency offset condition, phase jump condition, the amplitude of fluctuation is used to compare the four PLLs under harmonic condition. The application scopes of different FLLs are summarized to flexible selection in actual working condition.
Servo Control of Brush DC Motor with Variable Load
Authors: weisong Yang , shukun wang , baili Xu
Published: November 2019

In this article, in view of the characteristics of the cash circulation module of financial machines, such as fast note entering and going out of the note box and large change of load, a control system of fuzzy speed regulation of the note box based on the existing brush driven DC motor through simple feedback signals is designed, so as to realize the stable note output of the note box under varying load. Through experimental verification, after the speed adjustment of the note box, the change in the delivery speed of note has been greatly reduced, and the time change rate of each note transmission has been controlled below 4%, which meets the design expectations and meets the requirements of the system, and can be used as a reference for design in related fields.
Radar HRRP Measurement of Ships
Authors: Zhu Mingbo , Sun Minghao , Ding Xiangrong
Published: November 2019

High resolution range profile (HRRP) has become an important research direction in the field of radar target recognition. Measuring the one-dimensional HRRPs of targets and analyzing their characteristics have great significance and practical application value to target recognition. This paper has practically measured the HRRPs of ships in the sea surface utilizing the x-band phase-coherent pulse compression radar measurement platform, which lays a solid foundation for further research on ship target recognition.
A Joint Radar Signal Sorting Method For Multi-Radar Reconnaissance Station
Authors: Kun HE , Xubo LIU , Yi LIU , RiCheng GUO , KaiFeng GUO
Published: November 2019

Passive Detection Network Composed of Multi-Radar Reconnaissance Station, which can receive multiple sets of radar signal pulse descriptor word at the same time, joint signal sorting becomes an inevitable measure of such data. This paper proposes a multi-radar time-aligned association sorting method, and builds scenario close to actual conditions for testing. The results show that method can overcome the problem of partial pulse loss leading to sorting failure, and can quickly complete complex radar signal sorting in real electromagnetic environment.
Modified Eigenspace Based Iterative Robust Capon Beamformer
Authors: Jin Wei , Shen Xiaowei , Zhang Fenggan , Jia Weimin
Published: November 2019

To improve the performance of adaptive beamformer with large steering vector mismatch, a modified eigenspace based iterative robust capon beamformer (ME-IRCB) is proposed. The approach iteratively implements the robust Capon beamformer (RCB) with an adaptively adjusted uncertainty set. Based on the modified eigenspace method, the desired signal subspace is given, whereafter the size of the uncertainty set is adaptively adjusted according to the mismatch between the estimated and presumed steering vector of the desired signal at each iteration. The proposed approach gives two estimation methods about the uncertainty size, and both of them contribute to the robustness improving of the beamformer. Moreover, unlike other robust beamformers, the proposed approach does not take the integration of the steering vector’s outer product over the adjacent direction of the desired signal, and it works well with the adjacent directions of the desired signal and interference. This merit is due to that, the proposed approach only uses the fundamental sample covariance matrix during the subspace construction, therefore the influence of imprecise steering vector on the subspace is overcame. Simulation results show that the proposed approach performs better than the existing robust beamformers under different evaluation criteria.
K-means clustering algorithm in antenna selection for Massive MIMO
Authors: Xuefang Xiao , Guowei Lei , Yun Lin
Published: November 2019

Massive multiple-input multiple-output (MIMO) is considered as the promising technique in next generation of wireless communication system. It has high spectral efficiency and energy efficiency. In addition, it can mitigate the interferences among users as the amount of antennas at base station (BS) grows. But, the high complexity and cost of hardware pose huge challenges to massive MIMO. In future, antenna selection (AS) is still a choice to decrease the burden of BS. In this letter, the AS algorithm based on K-means clustering is proposed to maximizing the capacity with low computational complexity. Finally, the simulated results are presented to validate the proposed method.
Bayesian Network and Association Rules-based Transformer Oil Temperature Prediction
Authors: Rao Wei , Zhu Lipeng , Pan Sen , Yang Pei , Qiao Junfeng
Published: November 2019

The oil temperature prediction of transformer is very important for the operation stability and life evaluation of transformer. As the oil temperature prediction of transformer is still short of a comprehensive and efficient method with combining various information of transformer such as operation data and meteorological data, this paper proposed a Bayesian network and association rules-based transformer oil temperature prediction method, which can improve the prediction accuracy of RBF-NN for transformer oil temperature prediction. The proposed method first mines all association rules among transformer state data and transformer operation data and environmental meteorological information by combining the Bayesian network and the Apriori algorithm and then uses the association rules to improve the prediction accuracy of RBF-NN based on only transformer state data. A case study with a 500kV transformer is conducted to test the effectiveness of the proposed method, and the result shows that the proposed method can improve the prediction accuracy of RBF-NN about 10%.
A Method of Detecting Driver's Alcohol Concentration
Authors: Bin WU
Published: November 2019

Drivers drunk driving can bring a lot of harm. The paper studies a device that is placed in the car to detect whether the driver is drunk driving. The system consists of a core processor, an alcohol sensor, a display device, and an alarm device. The fitting curve of the alcohol sensor was determined through experiments, and the correspondence between the output voltage and the alcohol concentration was obtained. The design can detect the state of the driver’s alcohol concentration in real time in the car. When the system thinks that the driver’s alcohol concentration exceeds a certain value, a voice alarm is issued, and the device can effectively prevent the driver from drunk driving.
Survey of Recommendation Based on Collaborative Filtering
Authors: Juan Wang , Yue-xin Lan , Chun-ying Wu
Published: November 2019

This paper introduces the domestic and international research of collaborative filtering, and discusses the main problems of collaborative filtering algorithm, including data sparsity, cold start and accuracy of similarity measure.Then, future research and development trends of integrating deep learning to recommender systems are pointed out. In order to solve the data sparsity and cold start problems in the personalized recommendation system, a hybrid collaborative filtering recommendation algorithm is proposed, which combines the KNN model and XGBoost model. When deep learning is applied to recommendation system by integrating massive multi-sources heterogeneous data,it could improve the performance of the recommendation system.