bluuebunny/crossref_metadata_2025 huggingface dataset:
Stereoselective Total Synthesis of Arundinolides A and B
Authors: Liu Jun , Dong Zhi-Bing , Chang Caizhu , Geng Jialin , Liu Yinxin , Du Yuguo
Published: February 2020

The efficient and enantioselective syntheses of arundinolides A and B have been accomplished for the first time from chiral pool methyl-2,3-O-isopropylidene-β-d-ribofuranoside and d-ethyl lactate. The key features of the total synthesis are intramolecular crotonyl migration and NaBH4-CuCl catalyzed regioselective reduction and cross-metathesis reaction.
Feline Distal Tibial Physeal Fracture Repair Using a Modified Cross-Pin Technique with Four Pins
Authors: Miraldo Diogo , Salmelin Bettina , Yeadon Russell
Published: February 2020

Objective The aim of this article was to report the surgical technique and clinical outcome of a modified cross-pin technique for the treatment of distal tibial physeal fractures in cats without postoperative external coaptation.

Study Design This study was a retrospective clinical study.

Animals A total of 9 cats were presented with fracture of the distal tibial physis.

Materials and Methods Medical records from July 2014 to September 2018 were reviewed. In all cases, a second medial and a craniolateral Kirschner wires were added to the traditional cross-pin technique. Information reviewed included orthogonal radiographs pre- and post-surgery and at subsequent re-examinations, subjective assessment of lameness and passive range of motion, veterinary clinical assessment and completion of a functional questionnaire (feline musculoskeletal pain index) at the time of writing this report. Eight owners completed the questionnaire. The mean questionnaire follow-up time was 12.7 months.

Results Uncomplicated fracture healing occurred in all patients. Two patients required implant removal due to Kirschner wire migration and protrusion through the skin at 5 and 12 months post-surgery. No other complications were noticed. Eight patients had an excellent outcome, and one patient had a good outcome.

Conclusion Distal tibial physeal fractures in cats can be treated successfully with the use of a modified cross-pin technique and without the use of external coaptation. Prognosis should be considered favourable for this type of fracture.
The Preferred Management of a Single-Digit Distal Phalanx Amputation
Authors: Kwon Soo-Ha , Lao William Wei-Kai , Hsu Angela Ting-Wei , Lee Che-Hsiung , Hsu Chung-Chen , Huang Jung-Ju , Qiu Shan Shan , Tilkorn Daniel , Tang Evelyn Ting-Hsuan , Lu Johnny Chuieng-Yi , Chang Tommy Nai-Jen
Published: February 2020

Background Replantation of a single digit at the distal phalanx level is not routinely performed since it is technically challenging with questionable cost-effectiveness. The purpose of this study was to analyze international microsurgeons' clinical decisions when faced with this common scenario.

Methods A survey of a right-middle finger distal phalanx transverse complete amputation case was conducted via online and paper questionnaires. Microsurgeons around the world were invited to provide their treatment recommendations. In total, 383 microsurgeons replied, and their responses were stratified and analyzed by geographical areas, specialties, microsurgery fellowship training, and clinical experiences.

Results Among 383 microsurgeons, 170 (44.3%) chose replantation as their preferred management option, 137 (35.8%) chose revision amputation, 62 (16.2%) chose local flap coverage, 8 (2.1%) chose composite graft, and 6 (1.6%) favored other choices as their reconstruction method for the case study. Microsurgeons from the Asia-Pacific, Middle East/South Asia, and Central/South America regions tend to perform replantation (70.7, 68.8, and 67.4%, respectively) whereas surgeons from North America and Europe showed a lower preference toward replantation (20.5 and 26.8%, respectively p < 0.001). Having completed a microsurgery fellowship increased the attempt rate of replantation by 15.3% (p = 0.004). Clinical experience and the surgeons' specialties did not show statistical significance in clinical decision making.

Conclusion From the present study, the geographic preferences and microsurgery fellowship experience influence the method of reconstruction for distal phalanx amputation. Multiple factors are taken into consideration in selecting the most suitable reconstructive method for each case scenario. In addition to the technical challenges of the proposed surgery, the cost of the procedure and the type of facility needed are important variables in the decision making process.
Giant Serpentine Internal Carotid Artery Aneurysm with Complex Aortic and Supra-aortic Vascular Anatomy: Endovascular Treatment through Direct Percutaneous Carotid Puncture
Authors: Dalai Sibasankar , Limaye Uday , Narayana R. V. , Prasad Guru , Pati Rajesh , Anand Sunanda
Published: February 2020

Giant serpentine aneurysm (GSA) with rare aortic and supra-aortic vascular anomaly is technically difficult to treat. Often such patients suffer without treatment. We have treated a patient by a different approach which is not regularly followed. This case has many developmental anomalies with complicated anatomy, and it is a challenge to the treating interventionist.
Neonatal Polycythemia and Hypoglycemia in Newborns: Are They Related?
Authors: Hopfeld-Fogel Adi , Kasirer Yair , Mimouni Francis B. , Hammerman Cathy , Bin-Nun Alona
Published: February 2020

Objective This study aimed to test whether neonatal hypoglycemia (NH) is more common in infants with neonatal polycythemia (NP).

Study Design This is a retrospective study based on universal screening of NH and targeted screening for NP. Polycythemia was defined as venous hematocrit ≥ 65%. NH was defined as whole blood glucose (BG) concentration < 48 mg/dL (measured using a “point-of-care” analyzer [Accu-Chek]).

Results The study population consisted of 119 consecutive term polycythemic infants and 117 controls. There were no significant differences between the two groups in perinatal characteristics, minimal BG concentration, and rate of hypoglycemia. In a stepwise backward multiple regression where NH was the dependent variable, only maternal gestational diabetes mellitus (p = 0.032) and toxemia (p = 0.001) remained significant, whereas NP was insignificant.

Conclusion NH is not more common in NP infants than in non-NP infants. We suggest that the occurrence of NH in infants with NP might be related to the common risk factors of the two morbidities.
Enhanced thermally aided memory performance using few-layer ReS2 transistors
Authors: Goyal Natasha , Mackenzie David M. A. , Panchal Vishal , Jawa Himani , Kazakova Olga , Petersen Dirch Hjorth , Lodha Saurabh
Published: February 2020

Thermally varying hysteretic gate operation in few-layer ReS2 and MoS2 back gate field effect transistors (FETs) is studied and compared for memory applications. Clockwise hysteresis at room temperature and anti-clockwise hysteresis at higher temperature (373 K for ReS2 and 400 K for MoS2) are accompanied by step-like jumps in transfer curves for both forward and reverse voltage sweeps. Hence, a step-like conductance (STC) crossover hysteresis between the transfer curves for the two sweeps is observed at high temperature. Furthermore, memory parameters such as the RESET-to-WRITE window and READ window are defined and compared for clockwise hysteresis at low temperature and STC-type hysteresis at high temperature, showing better memory performance for ReS2 FETs as compared to MoS2 FETs. Smaller operating temperature and voltage along with larger READ and RESET-to-WRITE windows make ReS2 FETs a better choice for thermally aided memory applications. Finally, temperature dependent Kelvin probe force microscopy measurements show decreasing (constant) surface potential with increasing temperature for ReS2 (MoS2). This indicates less effective intrinsic trapping at high temperature in ReS2, leading to earlier occurrence of STC-type hysteresis in ReS2 FETs as compared to MoS2 FETs with increasing temperature.
Optimal time-domain pulse width modulation for three-phase inverters
Authors: Tyagi Siddharth , Mayergoyz Isaak
Published: February 2020

An optimal time-domain technique for pulse-width modulation (PWM) in three-phase inverters is presented. This technique is based on the time-domain per phase analysis of three-phase inverters for linear, balanced output load circuits. Exact analytical solutions for the output phase currents are presented for first, second, and third order circuits for any sequence of rectangular pulses. Next, the role of symmetries in the structure of three-phase PWM inverter voltages is discussed. Finally, using the exact analytical solutions for phase-currents as well as symmetry considerations, minimization of output current harmonics is set up as an optimization problem. Sample numerical results are presented that highlight improvements in the performance of three-phase inverters.
Interfacial layer assisted, forming free, and reliable bipolar resistive switching in solution processed BiFeO3 thin films
Authors: Kumari Chandni , Varun Ishan , Tiwari Shree Prakash , Dixit Ambesh
Published: February 2020

BiFeO3 based resistive random access memory (RRAM) devices are fabricated using a low-cost solution process to study the effect of an Al top electrode on switching behavior and reliability. Fabricated devices demonstrated bipolar switching characteristics with a moderate Ion/Ioff ratio, set and reset voltages of ∼−1.3 V and ∼0.8 V, DC and AC endurance of more than 250 cycles and 7100 cycles, respectively, and a retention time of over 104 s, confirming the non-volatile resistive switching behavior. The ohmic and trap filled space charge limited conduction dominates the conduction mechanism in the devices at lower and higher voltages, respectively. Moreover, impedance spectroscopy measurements substantiate the presence of an AlOx layer at the Al/BiFeO3 interface resulting from the Al–O interaction at the junction, which is the possible rationale of reliable complementary switching in these RRAM devices. The switching mechanism is elucidated using the formation and rupture of the oxygen vacancy mediated filament, assisted by the participation of a thin AlOx layer at the Al/BFO interface. The role of the thin AlOx layer is explained by modeling of impedances.
Seasonal litterfall composition and carbon and nitrogen returns in New Zealand shrubland
Authors: Lambie S. M. , Dando J.
Published: February 2020

Mānuka–kānuka shrubland is an important carbon (C) sink in New Zealand, yet little is known about C cycling within these systems. The objective of our work was to assess seasonal litterfall rates, composition, and C and nitrogen (N) inputs in mixed mānuka (Leptospermum scoparium J.R. Forst & G. Forst.) and kānuka (Kunzea ericoides var. ericoides (A.Rich) J.Thompson) stands. Litterfall was collected for 2years at Tongariro National Park (NP) and Stoney Creek, Wairarapa (SC), separated into leaf, twig, bark, seed and ‘other’, and the C and N content of each component measured. Total litterfall was between 3557 and 4443kgha–1year–1, of which leaf material contributed 46–67%. Litterfall peaked during spring–summer months at both sites, and the overall litterfall rate was greater (P < 0.001) at SC than NP. Litterfall at SC contained greater (P < 0.001) amounts of ‘other’ due to higher undergrowth contributions, and also greater seed fall (P < 0.001), possibility due to the lower altitude at SC. The proportion of leaf material in litterfall also peaked during summer (P < 0.001). C inputs in the total litter were 1941–2448kgCha–1year–1 and N inputs ranged between 28 and 37kgNha–1year–1. There was little seasonal difference in C and N contents and the majority of both C and N inputs in litterfall were in the leaf material (P < 0.001). C inputs peaked during summer, but N inputs were closely aligned with total litterfall maximums during spring–summer. The leaf:wood ratio was 1.9 at both sites, indicating litter quality was consistent at both stands, regardless of differences in composition. Although the sites had similar rainfall and shrub ages, the rate of total litterfall differed, reflecting the potentially site-specific nature of litterfall in mānuka–kānuka shrubland. Further work is needed assessing litterfall and degradation rates across New Zealand to establish if mānuka–kānuka shrublands would remain carbon sinks under climate change.
Analysis of the miRNA transcriptome during testicular development and spermatogenesis of the Mongolian horse
Authors: Li Bei , He Xiaolong , Zhao Yiping , Bai Dongyi , Li Dandan , Zhou Zhiyu , Manglai Dugarjaviin
Published: February 2020

Numerous studies have shown that microRNAs (miRNAs) are essential for testicular development and spermatogenesis. In order to further characterise these physiological processes, three immature and three mature testes of the Mongolian horse were collected and six libraries were established. Using small RNA sequencing technology, 531 mature miRNAs were identified, including 46 novel miRNAs without previously ascribed functions. Among the 531 miRNAs, 421 were expressed in both immature and mature libraries, 65 miRNAs were found solely in immature testis libraries and 45 miRNAs were found solely in mature testis libraries. Furthermore, among the miRNAs that were identified in both immature and mature libraries, 107 were significantly differentially expressed (corrected P value (padj)<0.05). Among the miRNAs that were only expressed in immature testes, two miRNAs were differentially expressed, whereas among the miRNAs that were only expressed in mature testes, nine miRNAs were differentially expressed. Comprehensive analysis of miRNA and mRNA expression profiles predicted 107 miRNA–mRNA interaction sites. Gene ontology (GO) and Kyoto Encyclopaedia of Genes and Genomes (KEGG) pathway analysis of the predicted target genes suggested roles of the differentially expressed miRNAs in testicular development and spermatogenesis. These findings identify miRNAs as key factors in the development of the testes and spermatogenesis in the Mongolian horse, which may also help us to understand the mechanisms of fertility in related mammalian species.
Estimation of surface dead fine fuel moisture using automated fuel moisture sticks across a range of forests worldwide
Authors: Cawson Jane G. , Nyman Petter , Schunk Christian , Sheridan Gary J. , Duff Thomas J. , Gibos Kelsy , Bovill William D. , Conedera Marco , Pezzatti Gianni B. , Menzel Annette
Published: February 2020

Field measurements of surface dead fine fuel moisture content (FFMC) are integral to wildfire management, but conventional measurement techniques are limited. Automated fuel sticks offer a potential solution, providing a standardised, continuous and real-time measure of fuel moisture. As such, they are used as an analogue for surface dead fine fuel but their performance in this context has not been widely evaluated. We assessed the ability of automated fuel sticks to predict surface dead FFMC across a range of forest types. We combined concurrent moisture measurements of the fuel stick and surface dead fine fuel from 27 sites (570 samples), representing nine broad forest fuel categories. We found a moderate linear relationship between surface dead FFMC and fuel stick moisture for all data combined (R2=0.54), with fuel stick moisture averaging 3-fold lower than surface dead FFMC. Relationships were typically stronger for individual forest fuel categories (median R2=0.70; range=0.55–0.87), suggesting the sticks require fuel-specific calibration for use as an analogue of surface dead fine fuel. Future research could identify fuel properties that will enable more generalised calibration functions.
TIP5 primes prostate luminal cells for the oncogenic transformation mediated by
PTEN
-loss
Authors: Pietrzak Karolina , Kuzyakiv Rostyslav , Simon Ronald , Bolis Marco , Bär Dominik , Aprigliano Rossana , Theurillat Jean-Philippe , Sauter Guido , Santoro Raffaella
Published: February 2020

Prostate cancer (PCa) is the second leading cause of cancer death in men. Its clinical and molecular heterogeneities and the lack of in vitro models outline the complexity of PCa in the clinical and research settings. We established an in vitro mouse PCa model based on organoid technology that takes into account the cell of origin and the order of events. Primary PCa with deletion of the tumor suppressor gene
PTEN
(
PTEN
-del) can be modeled through
Pten-
down-regulation in mouse organoids. We used this system to elucidate the contribution of TIP5 in PCa initiation, a chromatin regulator that is implicated in aggressive PCa. High TIP5 expression correlates with primary
PTEN
-del PCa and this combination strongly associates with reduced prostate-specific antigen (PSA) recurrence-free survival. TIP5 is critical for the initiation of PCa of luminal origin mediated by
Pten
-loss whereas it is dispensable once
Pten
-loss mediated transformation is established. Cross-species analyses revealed a
PTEN
gene signature that identified a group of aggressive primary PCas characterized by
PTEN
-del, high-TIP5 expression, and a TIP5-regulated gene expression profile. The results highlight the modeling of PCa with organoids as a powerful tool to elucidate the role of genetic alterations found in recent studies in their time orders and cells of origin, thereby providing further optimization for tumor stratification to improve the clinical management of PCa.
Right Peripheral Fragments
Authors: Fernández-Sánchez Javier
Published: February 2020

In recent years, a number of authors (De Vries 2009, Truckenbrodt 2015, Ott and de Vries 2016, inter alia) have defended that right dislocations (RD) should be treated as bisentential structures, where the “dislocated” constituent is actually a remnant of a clausal ellipsis operation licensed under identity with an antecedent clause. Although Romance RD is a fertile area of research, the consequences of the biclausal analysis remain unexplored in these languages. This monograph intends to fill this gap. Adopting this approach not only solves some issues that have always been at the core of dislocation structures in general; it also allows us to uncover novel sets of data and to provide straightforward explanations for well-known generalizations. Further, it brings RD along with a set of phenomena which are structurally very similar, like afterthoughts or split questions, which have been independently argued to display a bisentential structure. Under alternative, monoclausal approaches to RD, the striking similarities between these phenomena must be rendered anecdotal.
A corpus-based exploration of constructions in written academic
English as a lingua franca
Authors: Yilmaz Selahattin , Römer-Barron Ute
Published: February 2020

With English being the global language of
research, academic English as a Lingua Franca (ELF) research has
gained wide recognition. While early research showcased the dynamic
nature of spoken academic ELF, written academic ELF, a more recent
focus of research, remains to be under-studied. However, not only
are there known differences between speaking and writing, writing is
also the dominant mode of reporting new research in academia.
Situated within usage-based Construction Grammar (CxG), the present
study aims to identify constructions in written academic ELF in
comparison to American academic writing. Our methodological
approach, which combined a key word analysis with systematic
explorations of fixed and variable phraseological items in a corpus
of ELF academic writing, leads to the identification of
constructions that are characteristic of written academic ELF.
The influence of sources on First-Year Composition L1 student
writing
Authors: Doolan Stephen M.
Published: February 2020

Writing from sources is a necessity for academic
writing, but it is especially challenging for First-Year Composition
(FYC) writers (Horning &
Kraemer 2013; Serviss
& Jamieson 2017). Yet, few studies have empirically
investigated the source-based language use features of FYC writers.
For this study, English as a first language (L1) FYC students
(N = 232) wrote in-class essays using two
source readings. A multi-dimensional analysis on 13 linguistic
features associated with the presence or absence of source use
(e.g., reporting verbs, titles and authors, personal pronouns) was
conducted, resulting in three dimensions, (1) Source-Based Concept
Density vs. Prompt-Based Freewriting, (2) Impersonal Extension of
Source-Based Concepts, and (3) Source Text Deixis. Implications of
these dimensions for source-based student writing are discussed.
The use of lexical patterns in engineering
Authors: Nekrasova-Beker Tatiana , Becker Anthony
Published: February 2020

Over the past decade, engineering has been one
of the most oft-chosen fields of study for domestic and
international students at US colleges and universities (IIE 2017; NCES 2018). As a result,
the number of students in undergraduate engineering courses has
steadily grown, leading to increased attention devoted to the
written discourse encountered in engineering courses. The present
study investigates the linguistic overlap between published
textbooks used in lower-division undergraduate engineering courses
by focusing on the analysis of multi-word sequences – 5-word
phrase-frames – commonly found in five engineering disciplines.
Overall, it was found that, while frequency distribution and
structural characteristics of the identified phrase-frames were
consistent across the five corpora, there were dissimilarities in
the discourse functions performed by these patterns.
Stand-alone literature reviews
Authors: Wright Heidi R.
Published: February 2020

This chapter presents a new multi-dimensional
analysis of stand-alone literature reviews (e.g., Annual
Review of Medicine). Using the methods of Biber (1988), I analyzed
417 stand-alone literature reviews. A factor analysis of 72
grammatical features was conducted and a six-factor solution chosen.
The dimensions were interpreted as Human vs. Technical/Academic
Focus, Questioning/ Interpreting vs. Knowledge-Conferring,
Expression of Stance, Author/Discourse Community vs. Topic Focus,
Abstract vs. Concrete Focus, and Methodological Concerns vs.
Description. Texts were then divided into four groups: discipline,
time period, review type, and the presence or absence of methods.
Factorial ANOVAs found significant differences for discipline and
time period for many dimensions, whereas significant differences for
presence of methods and review type were limited to one dimension
each.
A multi-dimensional view of collocations in academic
writing
Authors: Zuppardi Maria Carolina , Berber Sardinha Tony
Published: February 2020

This chapter discusses the identification of the
major sets of interrelated collocations in academic writing across
different disciplines, or dimensions of collocation. A corpus of
textbooks and research articles from Social, Behavioral and Economic
Sciences, containing 10.6 million words across 230 texts was
analyzed using a collocational multi-dimensional analysis framework
(Berber Sardinha
2017). Results show four dimensions of collocation for
Social, Behavioral and Economic Sciences, namely: (1) Human Nature,
Culture and Research Methods vs. Economics; (2) Human Evolution and
Society; (3) Business and Finance; and (4) Statistics. The chapter
highlights a methodology for identifying collocational patterns
through multi-dimensional analysis, and contributes to a better
understanding of academic writing in Social, Behavioral and Economic
Sciences.
How are translation norms negotiated?
Authors: Hu Bei
Published: February 2020

Translation norms are conventionally viewed as forces that regulate translatorial behavior. Yet little is known about how norms are validated, challenged or broken by human agents. This quasi-experimental study of Chinese institutional translation proposes a risk-management model that explains how norms are jointly negotiated among the agents embedded in different institutional milieus. It is argued that norms are validated by the translators who strategically manage and weigh various translation risks pertaining to both the start and target cultures.
Untangling the contribution of Haspin and Bub1 to Aurora B function during mitosis
Authors: Hadders Michael A. , Hindriksen Sanne , Truong My Anh , Mhaskar Aditya N. , Wopken J. Pepijn , Vromans Martijn J.M. , Lens Susanne M.A.
Published: February 2020

Aurora B kinase is essential for faithful chromosome segregation during mitosis. During (pro)metaphase, Aurora B is concentrated at the inner centromere by the kinases Haspin and Bub1. However, how Haspin and Bub1 collaborate to control Aurora B activity at centromeres remains unclear. Here, we show that either Haspin or Bub1 activity is sufficient to recruit Aurora B to a distinct chromosomal locus. Moreover, we identified a small, Bub1 kinase–dependent Aurora B pool that supported faithful chromosome segregation in otherwise unchallenged cells. Joined inhibition of Haspin and Bub1 activities fully abolished Aurora B accumulation at centromeres. While this impaired the correction of erroneous KT–MT attachments, it did not compromise the mitotic checkpoint, nor the phosphorylation of the Aurora B kinetochore substrates Hec1, Dsn1, and Knl1. This suggests that Aurora B substrates at the kinetochore are not phosphorylated by centromere-localized pools of Aurora B, and calls for a reevaluation of the current spatial models for how tension affects Aurora B–dependent kinetochore phosphorylation.
Methods of Improving the Efficiency of Thermal Power Plants
Authors: Zhang Tongjun
Published: February 2020

As one of the most important power sources in modern society, electricity takes up a large proportion of modern energy consumption. Among all those methods of power generation, fossil-fuel thermal power generation is one of the earliest ways of large-scale electricity production. Its popularity in the modern society comes from its stability and controllability. Given the wide applications of electricity around the world, improving the efficiency of thermal power plants would be an effective way to reduce the total energy consumption and protect the environment. The paper discusses the efficiency of energy transition and its determinant during each stage of power generations along with proposals to improve the efficiency of thermal power generation.
Study on the Solution to Network Voltage Interruption of Hybrid EMU Network Side Converter
Authors: Lu Yutong , Zhang Yuxi , Chen Jie
Published: February 2020

Take the hybrid EMU as the research background, aiming at the possible network voltage interruption of its network side converter, this paper proposes a method to detect the network voltage interruption in time. Also, order to avoid the damage by the AC current shock on the system after the network voltage interruption is restored, a method to deal with the network voltage interruption is proposed and verified by simulation and experiment.
Research on Visualization of Hardware P2P Network Communication Based on STM32
Authors: Huiyuan Cao , Bin Ren , Renhao Yang
Published: February 2020

This paper mainly studies the visual communication of P2P network based on STM32 microprocessor in the hardware direction. It illustrates the research on P2P network by many corporations and scientific research institutions. Besides, this paper points out that P2P network play an important role in the field of Internet or teaching. By designing circuit schematic diagram and PCB and selecting STM32 microprocessor, CC2530 chip, SIM800C chip, it puts up the hardware platform of this research. The other way, it uses KEIL software to write program and transplant the UCOSIII operating system, and realize the independent operation of each node. As for software, it builds the basic of P2P network communication by designing the ZIGBEE data packet protocol. In addition, it writes various data storage containers and designs trust, motivation, and encryption algorithms. Finally, the whole communication process of this research is displayed dynamically on the LCD screen in real time. In short, this study is of reference significance for future researches on P2P network at the hardware level.
Research on Single-phase Grounding Fault Method for Urban Distribution Network Cable Network
Authors: Wei Song
Published: February 2020

This paper proposes a system-level overall solution that includes three levels of substation, distribution line and distribution automation master station. Through the transformation of power distribution and power distribution, the substation small current grounding line selection device, arc suppression coil automatic control equipment, power distribution terminal, and distribution automation main station are integrated. With a variety of comprehensive criteria as the core of technology, the operational effects of information interoperability, resource sharing, functional readiness, and unified monitoring are achieved. It can provide the production management department with the closed-loop processing method of “fault identification-isolation processing-data management-analysis promotion”. At the same time, different solutions can be configured for different site requirements, which can meet the needs of different regions and different site conditions, and effectively improve the site. Applicability solves the problem of single-phase grounding identification of cable lines.
Research on Integrated Construction Mode and Key Technologies of Regional Power Grid Dispatching System
Authors: Yinghua Song , Wei Yuan
Published: February 2020

This paper proposes a technical solution for the construction of an integrated system based on regional power grid dispatching system. The program is based on the principle of “economical application, resource reuse, information sharing, safety and reliability”. the scheme utilizes the software and hardware platform resources in the main network dispatching automation system in operation, and uses the modular construction method to construct the function of the distribution network automation master station. The key technologies used in the construction of the integrated system are described. The regional power grid deployment integration system is the trend and direction of power grid dispatching and distribution network dispatching system construction in small and medium-sized regions, and it is an effective way to rapidly promote power grid automation construction in small and medium-sized regions. A new scheme for the construction of the main distribution network integrated dispatch control system was explored.
The optimized allocation of emergency resources for power system restoration
Authors: Liang H P , Li Y , Wang X M , Liu Y P
Published: February 2020

In recent years, there have been frequent blackout accidents in foreign countries. For power system, the configuration of emergency resources affects the process of the power system restoration. It is the key to ensure the smooth restoration of power system that the emergency generating vehicle and the operations staff arrive at the substation in time after the blackout. In this paper, the optimal allocation scheme of the emergency generating vehicle considering the comprehensive importance of load nodes and traffic network constraints is proposed. The comprehensive importance degree of nodes is calculated by considering the spectral importance degree, the importance degree of load amount and the comprehensive importance degree of load of nodes. The blackout economic loss of node is evaluated by node’s comprehensive importance degree. In addition, the cost of configuration and maintenance of the emergency generating vehicle and the transmission cost under the constraint of traffic network are considered to establish the optimal configuration model of the emergency generating vehicle. Finally, the Discrete Binary Particle Swarm Optimization (DBPSO) is used to obtain the optimal configuration location of emergency generating vehicle and the optimal route for recovery. The validity and feasibility of the proposed method are verified by the results of IEEE39.
Light color performance analysis of LED take-off and landing signal lights in special weather conditions
Authors: Pan Da , Zhang Xinpeng , Wei Yijing , Yang Shujun , Chu Cong , Zhang Yuncui
Published: February 2020

The take-off and landing signal light is an integral part of the ship’s helicopter surface-assisted lighting system and light attenuation under special weather conditions are different. In this paper, the light color performance of an actual take-off and landing signal light are tested and the transmission characteristics under special weather conditions are analyzed. The methods of increasing the forward current and turn on the standby light source are studied. In this paper, the mathematical relationship between increasing current and increasing transmission distance is studied. The calculation of the example shows that the variation of the transmission distance of the take-off and landing signal by changing current is effective to adapt to weather conditions. For an example, the transmission distance of the given lamp is increased about 300 meters when the current is increased from 350 mA to 400 mA in sunny weather.
Line-of-Sight of Reflectors Reconstruction and Stabilization Technique based on Fastest Differential Tracker
Authors: Wang Jian-gang , Gao Jun-ke , Li Li , Han Wen-bin , Peng-jie Shi
Published: February 2020

In order to overcome the shortcomings of half-angle reflectors mechanism stabilization configuration, we study the Line-of-Sight (LOS) of reflectors reconstruction and stabilization technique. A LOS reconstruction and stabilization configuration of reflectors is designed and modeled. Firstly, we design the Fastest Differential Tracker (FDT) to estimate relative angular rates, then propose a two-coordinate modeling method that is easy to analyse disturbance isolation performance, thirdly we study the control system isolation deegree to the measurement noise and carrier disturbance. The simulations indicate that FDT has superior performance in tracking speed, noise suppression and steady state vibration suppression, and that the stabilization accuracy, in consideration of both noise and carrier disturbance, is about 70μrad(1σ). The experimental results show that reflector platform stabilization accuracy based on LOS reconstruction configuration is about 80μrad(1σ).
Design of Electric Cable Manufacturing Enterprise Information System based on Workshop Process
Authors: Liu Honghai , Hou Xianghua
Published: February 2020

With the development of information technology in China, Kingdee management system has won the majority market of small and medium-sized enterprises, but the management system software can only solve the financial, marketing, inventory and other records of general enterprises, lack of information technology for manufacturing process. To solve the problem, this paper proposes a logical design based on workshop process flow, analyzes the idea of workshop information, realizes the control of key processes in manufacturing industry, and improves efficiency and product quality.
Research on Sliding Mode Control of Two-phase Hybrid Stepper Motor Based on New PI Current Algorithm
Authors: Lv Yinxin , Xu Chen , Guo Haohao , Liu Yancheng
Published: February 2020

This paper aiming at improve the dynamic and static performance and system robustness of the stepper motor servo control system, a control method based on sliding mode is proposed. It can effectively improve the problems of low-frequency vibration and serious torque fluctuation of the stepper motor. At the same time, a new PI current algorithm related to the motor speed is designed. The new PI current algorithm not only ensures the current tracking performance but also increases the bandwidth in the process of speedy response. Compared with the conventional PI current control algorithm, the simulation results show that the new PI current algorithm has a faster response and higher control accuracy, which show that the new PI algorithm has a better control effect.
Key Parameter Identification and Optimization of Photovoltaic Power Plants Based on Genetic Algorithm
Authors: Zhang Zhimei , Huang Shaowei , Chen Ying , Wei Wei
Published: February 2020

As the penetration rate of the photovoltaic power continues to grow, its impact on the stability of the power system becomes more considerable ever than before. However, due to the relatively low accuracy of the parameters, the traditional electromagnetic transient simulation used to assess the impact is biased. Therefore, it is of great importance to perform key parameter identification and optimization on a solar power plant containing many photovoltaic panels, which can avoid the problem of combination explosion. In this paper, a scheme of key parameter identification is proposed. Then, an optimization method based on genetic algorithm is also established to improve the accuracy. Simulation tests validate the effectiveness of the proposed method.
Green Way: engineering transformations to the Green Industrial Technologies
Authors: Chernyaeva V A , Wang D H
Published: February 2020

This research integrates the spectres of the Green Silk Road policy with strategic plans, technological achievements, smart engineering decisions, international development prospects. It is conducting the development of the “One Belt One Road” which associated with technological and economic changes in the regions of interaction. Since the announcement of this initiative on September 7, 2013 as an international integration strategy of cooperation, almost 6 years have passed. One of the most important direction including all industrial cooperation aspects is a green policy – the set of rules and principles of manufacturing connected to the environment protection. Currently, the influence of interstate integration on the economic condition of countries and regions is increasing, but in combination with this there is a negative impact on the natural environment of the planet. It is time to put the protection of the planet on the first place in the world, and within the framework of integration projects like the New Silk Road many countries are ready to participate in the joint protection of the environment and many of them have already achieved certain results.
Maloperation Analysis and Preventive Measures of 500 kV Reactor Protection
Authors: Haisheng Li , Xuefei, Yang Shaoyuan Yang
Published: February 2020

This paper introduces the process of checking, analyzing and dealing with the causes of maloperation of the first set protection of 500 kV reactor in a substation. By checking the secondary circuit of 500 kV reactor protection for power outage, it is analyzed that the main cause of reactor protection malfunction is that the cable core of the current circuit of the first set protection is damaged at the secondary terminal box of TA of the high voltage casing pipes, which causes the induction current to enter in series, the abnormal sampling of the first set of protection B phase, and the protection outlet action. Aiming at the existing problems, this paper gives corresponding treatment methods and preventive measures.
Fault Prediction of Fan Gearbox Based on Deep Belief Network
Authors: Zheng Hanfeng , Dai Yiru
Published: February 2020

Due to the large amount of data in the actual fan equipment failure, the external noise is complicated, and there is a high degree of nonlinearity and complexity, which makes it difficult to extract the fault features. If the model is constructed by the traditional method, the accuracy of the fault prediction is poor. Therefore, considering the advantages of deep learning in data feature extraction, this paper proposes a wind fault prediction method based on deep belief network (DBN). The original raw data is firstly deleted and normalized, and then imported into the DBN for training. The internal parameters of the network are adjusted by reverse learning to improve the feature extraction accuracy. Finally, the BP neural network is used to predict the fault. Comparing the prediction results with the SVRM method, we can find that the method has certain advantages in the fault prediction for the data.
Analysis of light efficiency of classroom grille lamp from optical loss
Authors: He Xiaoyang , Li Xiangfeng , Shao Li , Zou Nianyu , Zhang Yini , Hao Bin , Zhao Chenyu , Wang Qiuping , Yu Ling
Published: February 2020

One of the most important reasons is the influence of classroom lighting. Classrooms are places where students use their eyes for a long time. It is necessary to ensure that the light environment is healthy, comfortable and up to standard. At present, Classroom lamp is being updated, and many classrooms use new type of grille lamps as the main source of illumination. In this paper, from the perspective of light energy loss, the existing grille lamps on the market are studied, the transmittance of the diffusion plate, the light output rate and reflectivity of the grille are analyzed, and the theoretical light efficiency is calculated and verified. Combined with the classroom lighting standards and simulation results, this paper explores whether the light efficiency of grille lamps meets the standard, and puts forward suggestions for improvement.
Research on Distributed Vertical Frequent Pattern Mining Method Based on Metadata Integration
Authors: Sun Li , Guo Li , Tian Huan
Published: February 2020

In order to better integrate the information industry into people’s life and work, and even in social development, how to mine data has become a hot issue. Metadata is a kind of data about data. Mining metadata helps data application and storage. Therefore, it is very important to find an efficient and intelligent data mining method. This paper introduces the metadata and its integration technology. On this basis, it introduces the distributed vertical frequent mode, and introduces its use in the process of mining metadata, providing a new working idea for the staff engaged in related industries.
Comfort Evaluation and Application of Office Chair Based on FAHP
Authors: Chen Siyuan , Chen Ming , Lyu Jianhua , Li Sichao
Published: February 2020

In order to establish an evaluation system of office chair comfort, this paper comprehensively and quantitatively analyzed the qualitative problem of comfort. Typical office chair samples were selected through cluster analysis and multi-dimensional scale analysis methods, and FAHP was used to establish the evaluation model from four aspects: physical scale, adjustability, support and synergy. Then, the model was used to evaluate the comfort of three office chair types. The results showed that it is feasible to apply FAHP to product evaluation of office chairs, and this evaluation model can provide a quantitative indicators system of seat products.
Technical and economic analysis of hollow (thin wall corrugated pipe) beamless floor in underground garage
Authors: Ronghui Lin , Guanming Guo , Hui Xie
Published: February 2020

as a new type of construction technology, hollow floor without beam has been widely used in constructions. This paper studied economic efficiency of selecting hollow (thin-walled corrugated pipe) beamless floor structure system, common beam slab structure system and beamless floor structure for the roof of underground garage. Through the comparative analysis, the following conclusions are obtained: If thin wall corrugated pipe hollow beamless floor technology is used in the construction of underground garage roof, the use of construction materials and the direct cost of the projectcan will be greatly reduced.
Research on Tool Wear Detection Based on Genetic Neural Network
Authors: Zeng Shaojun , Liu Songming
Published: February 2020

To improve the accuracy of tool wear detection, this paper proposes a tool wear detection method based on genetic neural network. Firstly, the vibration signals during tool processing are collected, and these signals are preprocessed to eliminate background noise. Then, in addition to the time-frequency analysis, the Ensemble Empirical Mode Decomposition which is more suitable for the processing of non-stationary random signals is also applied to extract tool wear sensitive features from signals. To reduce the computational complexity of the neural network, some minor components in the sensitive features can be omitted by kernel principal component analysis, leaving the principal components as the input of the neural network. Finally, aiming at the shortcomings of the BP neural network, the genetic algorithm is optimized in terms of chromosome coding, setting of control parameters and genetic operation, so that it can obtain better weights and thresholds to improve the BP neural network. The experimental result proves that the accuracy of BP neural network is 86.7% and that of genetic neural network is 96%. The tool wear detection method based on genetic neural network is more suitable for practical use.
Research on Power User Intelligent Load Forecasting Method Based on Data State Drive
Authors: Lv Da , Xue Jianjie , Zhang Yan , Tang Mengcong , Wu Yannan , Chen Qian
Published: February 2020

this paper proposed a variable input structure SVM prediction model based on state analysis. By identifying the key load characteristics in the load data and storing the load characteristics instead of the original load data, user load data can be realized more accurate and efficient. Based on the variable input structure SVM model of state analysis, the same state load is searched according to the results of state prediction in each period of the forecast day, and the same state historical load is used as the input factor of the model to predict. It effectively overcomes the interference of user power drift effect on load forecasting., and the forecasting accuracy is effectively improved.
A New Probability Evaluation Model and Method of Wind Power Absorption Capability Based on Multi-Scenario Operation Simulation
Authors: Li Xuxia , Wang Yao , Hu Yingying , Wang Peng
Published: February 2020

This paper proposed a probabilistic evaluation method of wind power absorption capacity considering interregional interaction based on multi-scenario operation simulation. The time scale of this method is pre-day, and many factors related to wind power absorption can be considered comprehensively, such as peak shaving capacity, frequency modulation capacity, load tracking capacity, rotating reserve capacity and network transmission capacity, which can provide a Multidimensional ratio evaluation of wind power absorption capacity which could identify the short-board factors that restrict wind power absorption. This paper provides a general framework for wind power absorptive capacity assessment. In the practical application of power system, the constraints can be flexibly chosen according to their own characteristics. The analysis results of the above examples show that the proposed method can effectively consider the inter-regional interaction, and can simulate and evaluate the system more accurately.
Gesture Recognition Based on Deep Learning
Authors: Zhang Tingxuan
Published: February 2020

In the modern society, the technology of artificial intelligence is playing a more and more important role. It is well known that we can use the deep learning to do the human gesture recognition which is quite helpful for us. For example, if our system finds a student who is playing his cell-phone in the classroom, the system will give him a very low score in this lecture. For another example, if some students are taking notes carefully, our system will give them very high scores. In this project, I used the knowledge of the deep learning which is quite hot recently, and applied the knowledge of human key point detection to realize behavior recognition.