bluuebunny/crossref_metadata_2025 huggingface dataset:
Preliminary study on the integration control platform of construction waste based on “BIM+GIS” technology
Authors: Wang Aoping , Wang Ning , Li Kuanqu , Ren Fumin
Published: February 2021

In recent years, the output of construction waste in China has been increasing. 70% of more than 600 large and medium-sized cities in China are surrounded by waste, of which the contribution rate of construction waste reaches 40%. Compared with some developed countries, China lacks real-time monitoring and intelligent control of the whole process of construction waste. In this paper, the popular “BIM + GIS” technology is introduced into the field of construction waste supervision. Based on this technology, a real-time monitoring and intelligent management and control information management platform for construction waste is established, so as to achieve accurate management and control of construction waste.
Effect of temperature on pyrolysis of sewage sludge: biochar properties and environmental risks from heavy metals
Authors: Wang Zhipu , Liu Shun , Liu Kai , Ji Shibo , Wang Mingming , Shu Xinqian
Published: February 2021

Biochars were prepared via the pyrolysis of sewage sludge at temperatures ranging from 350–550 °C. The properties and behaviors of heavy metals in the biochars were investigated. The results indicated that the pH values and ash contents of the biochars increased, while biochar yield and C, H, and N contents decreased with the increasing temperature. A high pyrolysis temperature contributed to a developed biochar pore structure. The specific surface area and pore volume of the biochars increased, while the average pore width decreased, with the increasing temperature. Heavy metals in the biochars were further enriched with the increasing temperature. TCLP tests demonstrated that the leaching potential of heavy metals from the biochars significantly decreased with the increasing temperature, indicating the decrease of potential ecological risks of heavy metals to the environment. Additionally, BCR tests confirmed the transformation of heavy metals from mobile fractions (F1 and F2) to stable fractions (F3 and F4). The evaluation results showed that a high pyrolysis temperature can effectively inhibit the ecological risks of heavy metals in the biochars. Thus, the conversion of sewage sludge into biochar via pyrolysis is a promising method for the safe disposal of sewage sludge.
Study on Sewage Sludge Drying System With Built-in Solar Drying Bed
Authors: Gu Zhipan , Yang Jichun , Liu Jing , Tao Leren , Zhang Ye , Huang Lihao
Published: February 2021

In this paper, the renewable energy solar energy is used as the heat source. The combination of solar drying bed and traditional hot air drying can effectively reduce energy consumption and operation cost. The drying chamber is divided into three layers. The top air supply outlet supplies hot air, the middle layer places wet sludge, and the bottom layer uses hot water coil to dry the sludge. The whole drying process is a heat and mass transfer process with convective heat transfer and radiation heat transfer. After analysis and comparison with traditional energy drying, it is found that drying 97.5kg of sewage sludge will save 79% energy, save 12.84 kg of standard coal, reduce 32 kg of carbon dioxide and 1.284 kg of sulphur dioxide.
Characterization of interaction between electric vehicles and smart grid
Authors: Zhang Yan , He Yongxiu , Su Fengyu , Wang Xiaoqing , Zhang Diling
Published: February 2021

With the development of smart distribution technology in the future, electric vehicle users can not only charge reasonably based on peak-valley price, they can also discharge electricity into the power grid to realize their economic benefit when it’s necessary and thus promote peak load shifting. According to the characteristic that future electric vehicles can discharge, this paper studies the interactive characteristics between electric vehicles and smart grid. In this paper, the example shows that the charging and discharging behaviour of EV users will bring significant fluctuation effect to the power grid load, and the reasonable TOU strategy can stimulate EV users to conduct reasonable charging and discharging, so as to smooth the peak and valley difference of some power grid.
Research and practice of kinetic energy system risk control technology in tobacco enterprises
Authors: Wang Husong , Ni Zhenyu , Jin Wei , Huang Qizhong , Xiao Guihui , Le Yuannan , Liu Jianmin , Hu Xiaohu , Chen Lifeng , Fang Biao
Published: February 2021

The purpose of this paper is to provide a data-oriented risk prevention and control system for seven major kinetic energy supply systems (power distribution, dust removal, moisture removal and odor removal, air pressure, vacuum, process soft water and sewage station water manufacturing, boiler steam system, air conditioning). The traditional risk control means should be improved through systematic process and information technology, and the risk management of operation control should be gradually transformed from event-driven to data-driven, so as to strengthen the comprehensive warning and prevention and control of operational risks. The management mode of integrated management and control is “clear hierarchy, effective air separation, effective control in place, quick early warning and simple handling”. Water, electricity, gas and steam of the power system are realized as part of the internal quality and process control of the cigarette brand, and all the control is pushed to the power supply terminal.
Fault characteristics of Inverter-Interfaced Distributed Generation
Authors: Ma Xiaoqin , Lv Hui , Xiao Wenjuan
Published: February 2021

Distributed generations can be divided into traditional synchronous generators and inverter interfaced distributed generations (IIDG) according to their different operation mode. While the fault characteristics of IIDG is different from traditional Distributed Generators, the in-depth analysis on output characteristics and fault characteristics of IIDG are the foundation of micro grid protection. The mathematical models under P/Q and V/F control strategy are discussed. After simplifying its model, the fault characteristics of IIDG under P/Q and V/F control strategy are studied using the simulation of PSCAD/EMTDC. The analysis on the fault characteristics of IIDG that lays the theoretical foundation for the micro-grid relay protection.
Study on Characters of Rural Residential Buildings Based on the Investigation in Shaanxi, Guangxi and Jiangsu in China
Authors: Li Zhihong , Huang Xianming , Yuan Duo , Ma Yingying
Published: February 2021

This paper is supported by the national key R&D program (2018YFD1100205) of China during the 13th Five-Year Plan “Research on the Construction Technology System of Green Livable Rural Residential Buildings”. This paper is focused on the characteristics of rural residential buildings form, functional space and villagers’ demands of buildings based on different regions, climate and economic performance. The research is processed in the field with spot plotting and questionnaire survey including interviews about the rural residential buildings in Luonan County of Shaanxi, Longan County of Guangxi and Wujiang District of Jiangsu. According to the statistical results, there is a contrastive analysis of rural residential buildings in time and space, and then the characteristics, influencing factors, modular spatial type of residential buildings have been teased out. Meanwhile it refines the development trends of rural residential buildings eventually combined with the demands of villagers.
Analysis on the Influence Factors of Construction Linear Control of Continuous Rigid Structure Bridge
Authors: Liu Yang , Zheng Chunmo , Ba Huaiqiang , Xu Guangli , Li Chao , Xie Qinyun
Published: February 2021

In order to study the influence of prestress on cantilever deflection and construction linear control of continuous rigid frame bridge in construction stage, this paper introduces the significance of continuous rigid frame bridge’s linear control, the calculation principle and deflection influence analysis of vertical formwork elevation in cantilever construction. According to a specific continuous rigid frame bridge, this paper use the finite element software to simulate and calculate the deflection of prestress to the cantilever construction of continuous rigid frame bridge. The influence of friction coefficient between prestressed steel bundle and bellows and prestress loss on cantilever deflection and construction line control of continuous rigid frame bridge is also analyzed, furtherly brings out the solution to deal with the problems due to the change of prestress.
Visual Analysis of Construction Waste Research Based on VOSviewer
Authors: Han Lihua , Gong Zhiqi
Published: February 2021

Large-scale engineering construction projects have irreversibly damaged the ecological environment while promoting economic development and improving living standards. As the demand for realizing a resource-conscious and environment-friendly society continues to grow, people are increasingly interested in the sustainable development of construction waste. In this paper, the relevant literature in the field of construction waste is retrieved through the Web of Science database as the research object, and the VOSviewer measurement analysis tool is used to analyze the existing international research results. According to the research results, the research on construction waste in the field of construction research has attracted much attention in recent years. At the same time, domestic scholars have made outstanding contributions to this field, but they have the disadvantages of insufficient research depth and low citation rate. The research hotspots in the field of construction waste mainly focus on the construction waste recycling aggregate, construction waste management, and construction waste resource utilization strategy.
Discussion on the Sustainable Development Pattern of Road Network Structure of Cities with a Population of 1-2 Million in China
Authors: Wen Zhengmin , Li Zhenqiang , Luo Wenshuo , Fu Yuxin , Quan Juan , Zhou Guohua
Published: February 2021

The urban road network system is the main carrier of urban traffic. The constraint factor that urban road network has on traffic leads to major urban traffic problems. In this paper, a questionnaire survey and the Delphi method are determined to determine the case cities with a population of 1-2 million at home and abroad. Literature research and comparative, analytical, and inductive research methods are used to compare, analyse, and evaluate the advantages and disadvantages of the road network structure of the case cities, to summarize the development law of the urban road network, and to propose a sustainable development structure model for each development stage of urban road network: the mode made of ring freeway + trunk street (the embryonic stage), the mode made of ring freeway + expressway + trunk street (the incubation stage), the mode made of outer ring freeway + outer ring expressway and radial expressway + trunk street (the mature stage). The innovative point of this paper is to put forward a sustainable development pattern for the road network structure of cities with a population of 1-2 million in China.
Control Performance of Different Bra Designs and Materials during Physical Activity
Authors: Sun Y , Yick Kl , Li P L , Tang M , Yu A , Yip J , Ng S P
Published: February 2021

Bras give support to the breasts and prevent damage to their different components during daily activities. Previous studies have however merely focused on specific types of bras and/or shoulder straps but failed to provide specific guidelines on bra features and materials that can be used to improve the support different functions of bras. The purpose of this study is to evaluate the breast control performance of various types and designs of bra under the conditions of walking and running. Two younger women and 1 older woman (all with a bra size of 36C/80C) have participated in a wear trial to don a total of 12 different commercial bras with different design features, and a changeable bra in which 12 different variables are examined, including the materials, strap width and type of underwire. The 3D movement of the breasts in the various bra conditions during walking at a speed of 4 km/h and running at 6 km/h is recorded and then compared with the braless condition by using an 11-camera motion capture system. The percentage of change in the nipple displacement in the vertical direction relative to the clavicle displacement is used to quantify and compare the breast control performance of the bras. A significant difference (p<0.01) in the ability of the bras to control movement is observed between the group of younger subjects and the mature subject (left breast: 11.49% vs. 35.42%, and right breast: 18% vs. 32.47%, respectively). The control performance of the bras is significantly different (p<0.01) during running and walking (left breast: 26.39% vs. 12.54%, and right breast: 30.04% vs. 15.61%, respectively). The correlation analysis showed that a small bra cup volume (length across the bra cup), taller gore, elongation of the bra strap and bra band, and rigid bra cup fabric allow good control of vertical breast displacement.
Extraction and diversified application of embroidery insole fabric elements in Hongan, Eastern Hubei
Authors: Zhou Yuechao , Li Min , Chen Yu
Published: February 2021

By the concept of redesign, the embroidery insole fabric elements of Hongan in Eastern Hubei Province is extracted and applied, and the application research of diversified creative products is carried out. On the premise of inheritance and innovation, the regional characteristics and cultural connotation of Hongan embroidered insole in Eastern Hubei Province are analysed. By understanding the connotation of the elements of Hongan embroidered insole fabric, the composition characteristics of common embroidered insole fabric is grasped, and the traditional fabric themes of Hongan embroidered insole is analysed and arranged; Extract the typical pattern fabric elements that can resonate with modern life, and extract, organize and redesign them; then through integration and reconstruction, carry out diversified application design of creative products. The fabric elements of Hongan embroidered insole are redesigned and applied in fashion, home textile products, clothing, interior decoration, etc. By redesigning, this paper analyses and arranges extracts and redesigns, integrates and reconstructs the elements of embroidered insole fabric in Hongan, Eastern Hubei Province, and studies the application of diversified creative product redesign. This modern process method and diversified application mode is not only the dynamic inheritance of traditional regional culture, but also the innovation and development of folk culture in Eastern Hubei Province. The inheritance and development of art traditional culture has important practical significance.
Dermatochirurgie: Lagerungstrick bei axillären Eingriffen und Hypermobilität der Brust
Authors: Weimann K. , Löser C. R.
Published: February 2021

Für den operativen Alltag ist es eine große Erleichterung, wenn man mit geeigneten Lagerungshilfen ein übersichtliches Operationsgebiet schaffen kann. Wir demonstrieren eine einfache Technik, die sich insbesondere bei Eingriffen nahe der Brust bewährt. Auch bei einer hypermobilen Brust („mobile Mamma“) genügt man so den Anforderungen an eine fachgerechte Lagerung.
Quo Vadis Urogynecology 2020 – Innovative Treatment Concepts for Urinary Incontinence and Pelvic Organ Prolapse
Authors: Naumann Gert
Published: February 2021

The current treatment for urinary incontinence and pelvic organ prolapse includes a wide range of innovative options for conservative and surgical therapies. Initial treatment for pelvic floor dysfunction consists of individualized topical estrogen therapy and professional training in passive and active pelvic floor exercises with biofeedback, vibration plates, and a number of vaginal devices. The method of choice for the surgical repair of stress urinary incontinence consists of placement of a suburethral sling. A number of different methods are available for the surgical treatment of pelvic organ prolapse using either a vaginal or an abdominal/endoscopic approach and autologous tissue or alloplastic materials for reconstruction. This makes it possible to achieve optimal reconstruction both in younger women, many of them affected by postpartum trauma, and in older women later in their lives. Treatment includes assessing the patientʼs state of health and anesthetic risk
profile. It is important to determine a realistically achievable patient preference after explaining the individualized concept and presenting the alternative surgical options.
Study on E-Cigarettes and Pregnancy (STEP) – Results of a Mixed Methods Study on Risk Perception of E-Cigarette Use During Pregnancy
Authors: Schilling Laura , Spallek Jacob , Maul Holger , Schneider Sven
Published: February 2021

Introduction E-cigarette use during pregnancy is a risk factor for maternal and fetal health. Early studies on animals showed that in utero exposure to e-cigarettes can have negative health outcomes for the fetus. There has been only limited research into the risk perceptions of e-cigarette use during pregnancy. This study was conducted to comprehensively characterize the constructs of risk perceptions with regard to e-cigarette use during pregnancy using an Integrated Health Belief Model (IHBM).

Methods Our STudy on E-cigarettes and Pregnancy (STEP) used a mixed methods approach, with the study divided into an initial qualitative part and a quantitative part. A netnographic approach was used for the first part, which consisted of the analysis of 1552 posts from 25 German-language online discussion threads on e-cigarette use during pregnancy. Using these qualitative results, a quantitative questionnaire was developed to explore risk perception constructs about e-cigarette use during pregnancy. This questionnaire was subsequently administered to pregnant women (n = 575) in one hospital in Hamburg, Germany. Descriptive and bivariate analysis was used to examine differences in risk perception according to participantsʼ tobacco and e-cigarette user status before and during pregnancy. While the study design, methods and sample have been extensively described in our recently published study protocol in the January 2020 issue of
Geburtshilfe und Frauenheilkunde, this paper is devoted to a presentation of the results of our mixed methods study.

Results Themes related to perceived threats identified in the qualitative study part were nicotine-related health risks and potential health risks of additional ingredients. Perceived benefits were possibility and facilitation of smoking cessation and a presumed potential to reduce harm. The subsequent quantitative part showed that nearly all participants (99.3%) perceived e-cigarettes which contained nicotine as constituting a threat to the health of the unborn child. The most commonly perceived barrier was health-related (96.6%), while the most commonly perceived benefit was a reduction in the amount of tobacco cigarettes consumed (31.8%). We found that particularly perceived benefits varied depending on the participantʼs tobacco and e-cigarette user status.

Conclusion When considering future prevention strategies, the potential health risks and disputed effectiveness of e-cigarettes as a tool for smoking cessation need to be taken into account and critically discussed.
Intensive Interaction
Authors: Grans-Wermers Lena , Klug Sarah , Hansen Franca
Published: February 2021

Kommunikation beinhaltet weit mehr als nur Sprache. Diese Tatsache macht sich die Intensive Interaction zunutze. Einfühlsam wird schwer beeinträchtigten Kindern und Jugendlichen ein interaktiver Austausch ermöglicht, der echte Selbstwirksamkeit schafft und das Wohlbefinden und die Gesundheit dieser Menschen unterstützt.
Hilfe aus der Luft: Wenn Drohnen Leben retten
Authors: Baumgarten Mina , Hahnenkamp Klaus
Published: February 2021

Bei der Versorgung von Menschen mit Herz-Kreislauf-Stillstand zählt jede Minute. Insbesondere in ländlichen Regionen kann dabei der Einsatz von Drohnen helfen. Das zeigt ein Modellprojekt des Universitätsklinikums Greifswald, das in diesem Jahr fortgesetzt wird.
Citizens’ attitudes towards local autonomy and inter-local cooperation: evidence from Western Europe
Authors: Strebel Michael A. , Kübler Daniel
Published: February 2021

Recent decades have seen a strengthening of local autonomy in many European states. At the same time, local governance capacities were strengthened through intermunicipal structures and territorial consolidation to prepare local authorities for additional tasks. In this paper, we assess what citizens think about strengthening local autonomy and strengthening inter-local cooperation. We argue that citizens’ attitudes towards local autonomy and inter-local cooperation are a function of their behavioural, emotional and ideological connection to the local. Using data from a population-based survey in eight West European metropolitan areas in France, Germany, Switzerland and the UK, we show that local autonomy and inter-local cooperation supporters have divergent ideological positions concerning the allocation of political authority across state scales. Inter-local cooperation is supported by voters of new progressive left parties but opposed by right-wing nationalist partisans—who in contrast favour local autonomy. This suggests that the demarcation–integration divide which structures citizens’ attitudes towards international integration also matters for subnational and local governance reforms.
Elemental Pb initiated in situ Cl doping for improved photovoltaic performances of perovskite
Authors: Wang Peng , Liu Qi , Cui Yubo , Guo lijia , Pei Zhenfu , Fan Libo , Zheng Zhi
Published: February 2021

The introduction of halogen elements for high-quality perovskite is attracting more interest because the understanding of halogen doping is still challenging. In this work, a facile elemental Pb initiated in situ Cl doping method is developed to prepare CH3NH3Pb(I1-xClx)3 films by drying, without annealing, at low temperatures (below 60 °C) for improved photovoltaic performances of perovskite. Improved film crystallinity, structure uniformity, and surface smoothness are obtained by Cl doping. In addition, Cl doping in the films is confirmed by x-ray photoelectron spectroscopy (XPS) study. The prepared Cl doped perovskite films are characterized by x-ray diffraction patterns, scanning electronic microscopy, and XPS. The perovskite solar cells with a configuration of FTO/ZnO/CH3NH3Pb(I1-xClx)3/spiro-OMeTAD/Au are fabricated and characterized. Cl doping induces better crystallinity and large grain sizes, leading to improved light-harvesting and device performance. Therefore, the method developed in this work represents a new strategy for perovskite film growth and high-performance photovoltaics.
Deficiency of the novel high mobility group protein HMGXB4 protects against systemic inflammation-induced endotoxemia in mice
Authors: He Xiangqin , Dong Kunzhe , Shen Jian , Hu Guoqing , Liu Jinhua , Kang Xiuhua , Wang Liang , Atawia Reem T. , Osman Islam , Caldwell Robert W. , Xiang Meixiang , Zhang Wei , Zheng Zeqi , Li Liwu , Fulton David J. R. , Deng Keyu , Xin Hongbo , Zhou Jiliang
Published: February 2021

Significance

Sepsis is a life-threatening disorder triggered by systemic inflammation. Currently, there are no effective therapies targeting immune dysfunction in sepsis. The high mobility group (HMG) proteins are chromosomal proteins with important roles in regulating gene transcription. We found that the HMGXB4 protein is strongly induced by lipopolysaccharide. Knockout of
Hmgxb4
protected against endotoxemia-induced lethality in mice. Mechanistically, HMGXB4 promoted expression of the proinflammatory genes,
Nos2 and Icam1
. Increased NOS2 expression promotes excessive NO that causes tissue damage, and increased ICAM1 encourages monocyte attachment to endothelial cells. Our study reveals a critical role of HMGXB4 in endotoxemia via excessive NO production and increased monocyte adhesion which advances the concept that strategies targeting HMGXB4 may be effective for the treatment of sepsis.
A coating strategy to achieve effective local charge separation for photocatalytic coevolution
Authors: Zhao Tianshuo , Yanagi Rito , Xu Yijie , He Yulian , Song Yuqi , Yang Meiqi , Hu Shu
Published: February 2021

Significance

Particulate photocatalysis is a promising approach to solar fuels production at scale. Herein, we present a general design by using conformal coatings and attaching nanoscale cocatalysts to achieve local charge separation and, at the same time, to stabilize photocatalysts that are easily photocorroded otherwise. With spatial charge separation, the nanometer-spaced reductive and oxidative surface sites can coevolve to produce H
2
and O
2
, or to produce H
2
and oxidize redox mediators, or to produce O
2
and reduce redox mediators. This work investigates the charge separation strategy for the semiconductor/coating/cocatalyst structure both by tuning barrier height energetics and by building numerical models.
Compact sources and cosmological horizons in lower dimensional bootstrapped Newtonian gravity
Authors: Casadio Roberto , Micu Octavian , Mureika Jonas
Published: February 2021

We study the bootstrapped Newtonian potential generated by a localised source in one and two spatial dimensions, and show that both cases naturally lead to finite spatial extensions of the outer vacuum. We speculate that this implies the necessary existence of a cosmological (particle) horizon associated with compact sources. In view of the possible dimensional reduction occurring in ultra-high energy processes—like scatterings at Planckian energies, the gravitational collapse of compact objects or the end-point of black hole evaporation—one can consider such lower-dimensional ‘bubbles’ immersed in our Universe as describing (typically Planckian size) baby Universes relevant to those dynamics.
Prediction of combustion states from flame image in a domestic coal burner
Authors: Onat Cem , Daşkin Mahmut , Toraman Suat , Golgiyaz Sedat , Talu Muhammed Fatih
Published: February 2021

Coal is still a strategic fuel for many developing countries. The environmental impact of emissions resulting from the widespread use of coal worldwide is a matter of serious debate. In this perspective, clean coal burning technologies are in demand. In this study, a measurement system that estimates emission from flame images in a domestic coal burner is proposed. The system consists of a charge-coupled device camera, image processing software (real time image acquisition, noise reduction and extracting features) and artificial intelligence elements (classification of features by neural networks). In feature extraction stage, only five flame region features (Gx, Gy
, trace, L
2 and L
∞ norm) is extracted. Gcx
and Gcy
are the instantaneous change of the horizontal and vertical components of center mass of the flame image. These features are new concepts for emission estimation from the flame image. The proposed system makes a difference with its simpler structure and higher accuracy compared to its counterparts previously presented in the literature.
Thermochromic VO2–SiO2 composite coating from ammonium citrato-oxovanadate(IV)
Authors: Zhang Jing , Wang Tengfei , Xu Weiwei , Yang Xiaohui , Zuo Xiaoling , Cheng Weiwei , Zhou Chaobiao
Published: February 2021

Vanadium dioxide (VO2) coating plays an important role in energy saving and environmental protection due to its unique reversible phase transition. To solve the daylighting issue of VO2 coating, a VO2 (M)–silicon dioxide (SiO2) composite coating is fabricated from ammonium citrato-oxovanadate(IV) by a SiO2-assisted coating method. The VO2 (M)–SiO2 composite coating possesses excellent thermochromic properties that have produced varying results, i.e. 49.2% of visible transmittance, 52.3% of transmittance reduction at 2000 nm wavelength, 12% of solar energy modulation (ΔT

sol
) and a phase transition temperature of 56.0 °C. Our findings may pave the way to extending the large-scale application of smart windows based on thermochromic VO2.
Real-time registration of 3D echo to x-ray fluoroscopy based on cascading classifiers and image registration
Authors: Ma YingLiang , James Housden R , Fazili Ansab , Arujuna Aruna V , Rhode Kawal S
Published: February 2021

Three-dimensional (3D) transesophageal echocardiography (TEE) is one of the most significant advances in cardiac imaging. Although TEE provides real-time 3D visualization of heart tissues and blood vessels and has no ionizing radiation, x-ray fluoroscopy still dominates in guidance of cardiac interventions due to TEE having a limited field of view and poor visualization of surgical instruments. Therefore, fusing 3D echo with live x-ray images can provide a better guidance solution. This paper proposes a novel framework for image fusion by detecting the pose of the TEE probe in x-ray images in real-time. The framework does not require any manual initialization. Instead it uses a cascade classifier to compute the position and in-plane rotation angle of the TEE probe. The remaining degrees of freedom are determined by fast marching against a template library. The proposed framework is validated on phantoms and patient data. The target registration error for the phantom was 2.1 mm. In addition, 10 patient datasets, seven of which were acquired from cardiac electrophysiology procedures and three from trans-catheter aortic valve implantation procedures, were used to test the clinical feasibility as well as accuracy. A mean registration error of 2.6 mm was achieved, which is well within typical clinical requirements.
Single-hole physics in GaAs/AlGaAs double quantum dot system with strong spin–orbit interaction
Authors: Studenikin Sergei , Korkusinski Marek , Bogan Alex , Gaudreau Louis , Austing D Guy , Sachrajda Andrew S , Tracy Lisa , Reno John , Hargett Terry
Published: February 2021

There is rapidly expanding interest in exploiting the spin of valence-band holes rather than conduction-band electrons for spin qubit semiconductor circuits composed of coupled quantum dots. The hole platform offers stronger spin–orbit interaction (SOI), large difference between in-dot-plane and out-of-dot-planeg-factors, i.e.g-factor anisotropy, and a significantly reduced hyperfine coupling to nuclei in the host material. These attributes collectively can deliver fast all-electric coherent spin manipulation, efficient spin-flip inter-dot tunneling channels, a voltage tunable effectiveg-factor, ag-factor adjustable to nearly zero in an appropriately oriented external magnetic field, and long spin relaxation and coherence times. Here, we review our recent work on the physics of heavy holes confined in a planar GaAs/AlGaAs double quantum dot system with strong SOI. For asingle-hole, we have performed resonant tunneling magneto-spectroscopy to extract spin-flip and spin-conserving tunneling strengths, implemented spin-flip Landau–Zener–Stückelberg–Majorana (LZSM) interferometry, determined the spin relaxation timeT1as a function of magnetic field using a fast single-shot latched charge technique, electrically tuned the effectiveg-factor revealed by electric dipole spin resonance, and found signatures of the hyperfine interaction and dynamic nuclear polarization with holes. Fortwo-holes, we have measured the energy spectrum in the presence of strong SOI (and so not limited by Pauli spin blockade), quantified the heavy-hole (HH)g-factor anisotropy on tilting the magnetic field, described a scheme to employ HHs whoseg-factor is tunable to nearly zero for an in-plane magnetic field for a coherent photon-to-spin interface, and observed a well-defined LZSM interference pattern at small magnetic fields on pulsing through the singlet-triplet anti-crossing.
Linear voltage regulation in DC-to-DC converters
Authors: Veselovskiy A P , Kosareva L I , Zverev S G
Published: February 2021

The article deals with the most dynamically developing branch of power electronics related to solving tasks of voltage regulation in DC-to-DC converters. Linear regulation of the output voltage is carried out using pulse-width modulation. A linear regulatory characteristic is obtained over the entire control range from zero to maximum values. The formula of the output voltage regulation characteristic is obtained through a mathematical model of a pulse-width control method with a variable pulse width.
Synthesis of parameters of elastic-damping devices to reduce the dynamic loads of mining machines based on the concept of inverse dynamic problems
Authors: Kuznetsov N K , Iov I A , Iov A A
Published: February 2021

The article is devoted to the issues of reducing the dynamic loads of mining machines using elastic-damping devices built into the mechanism. It presents the results of research that determines the parameters of these devices based on the solution of the inverse dynamic problem for a given low of change of elastic force in the cable of the excavator traction mechanism. It is shown that the use of this synthesis method allows us to obtain optimal values of the design parameters of such devices that fulfill several contradictory criteria of the quality of the transition process, determined by the desired low of change of the force in the cable. Using the example of a two-mass electromechanical system that simulates the dynamic properties of a dragline traction mechanism equipped with an elastic-damping device, the procedure of the synthesis of the proposed parameters is described and the results of a numerical study of its efficiency are presented.
Development of the production monitoring system based on the Industrial Internet of Things platform
Authors: Mikhailov A B , Tretyakov S D , Andreev Y S , Medunetskiy V M , Aung Thinn Ko
Published: February 2021

The article is devoted to the results of integrating the industrial Internet of things platform and industrial production into a digital environment. The architecture of a data collection system is shown and ready for its implementation on the PJSC Techpribor and the laboratory of ITMO University. Firstly, we prepared the methodology for modeling three-dimensional scenes and the methodology for generating equipment data models. These methodologies are for the Winnum Industrial Internet of Things (IIoT) platform. Secondly, we indicated the main stages of Winnum platform integration into the enterprise information system in the framework of the described methodology.
Models for representing limit states in geomechanics
Authors: Mikhailov A V , Zyuzin B F , Zhigulskaya A I
Published: February 2021

A new paradigm of scientific knowledge enabling to display the ultimate stress-strain states in geomechanics is presented in the article. In this case, distortion serves as a natural science theory. The main results concerning the development of distortion theory in natural systems are presented. Geometrical models for representing limiting states and determining distortion invariance during the materials deformation are shown. The format for forming a “strength certificate” of organic mineral soils for solving power and energy problems in the design of executive working bodies of mining machines is given. The technique for representing deformation processes in a reduced square system is described. The proposed methodology and criteria for the stress-strain state are a further development of the E.I. Shemyakin’s synthetic theory of strength. Areas of mutual influence of the main parameters of the soils strength certificate are as follows: specific adhesion and angle of internal friction and their compliance with the experiments of Buisman. The universality of the models under consideration is shown. This enables to give a mathematical description of the limiting parameters and criteria of stress-strain states in an invariant form and a clear geometric mapping.
Modeling laser head housing and engineering by analyzing walls rigidity in CAE-systems
Authors: Nikolaev A D , Pompeev K P
Published: February 2021

The paper considers a possible way to expand the technological capabilities of numerically controlled machines by upgrading and integrating a fiber laser system into their composition. An important task is to facilitate the details of laser head housing while maintaining their stiffness parameters. To achieve the aim of the research, the laser head body was completely redesigned, some structural elements were combined, and all the walls of the body became lighter and more functional. The new design will be much more convenient to use while maintaining the same rigidity. The new laser head housing will make it possible to expand the range of work for numerically controlled machines, which in turn will lead to a reduction in the production time of not only one product, but also the final product as a whole. This approach will reduce the cost of maintaining and maintaining a large number of equipment, since the integration of laser equipment into numerically controlled machines will reduce the number of equipment in the workshops. In addition, marking and manufacturing parts on the same machine will not only significantly automate the processes of further Assembly of the final product by applying QR codes, but also will increase the accuracy of marking and engraving on the product due to a one-step process.
Analysis, topology modification and modeling of the laser head casing taking into account the capabilities of additive equipment
Authors: Pompeev K P , Pyae P A , Vasilev O S , Gorny S G
Published: February 2021

The article considers the issue of improving the design of the laser head casing in order to ensure its compactness and take into account the capabilities of additive equipment that allows making more complex plastic casing parts without violating the collectability and maintainability of the laser head casing. The manufacture of a laser head casing made of plastic makes it possible to reduce its material consumption in comparison with a casing made of aluminum alloy. At the same time, it is proposed to further reduce the material consumption of the plastic casing due to the introduction of special recesses and stiffening ribs into its design. In the CAE-module of the CAD/CAM-system SolidWorks, a comparative analysis of the strength and stiffness of the laser head casing design options, assembled from parts with recesses and stiffeners, as well as without them. The modeling results of the deformation process for the casing variants convincingly showed that it is possible to replace the material of its parts from aluminum alloy to plastic and that reducing the material consumption and changing the design of the casing does not lead to such a loss of its strength and rigidity which causes an unacceptable deviation of the laser beam from the vertical, that is, does not affect the functioning of the laser head.
Manifestation of the “striped heating” effect in numerical simulation of induction heating of ferromagnetic bodies near the Curie point
Authors: Chmilenko F V , Rastvorova I I , Yermekova M R
Published: February 2021

For the first time, the effect of “striped heating” in the induction heating of ferromagnetic materials is mentioned in the works of Soviet scientists Lozinski M.G. and Babat G.I. in the mid-20th century. They tried to give a physical explanation for the “striped heating” and expressed fears that the phenomenon might limit the use of induction hardening. However, in the practical use of induction heating in most cases, there was no significant influence of this effect on the process. In this regard, the “striped heating” was not actively discussed by the scientific community and was not sufficiently researched. The discussion on this issue was resumed by prof. Dzliev S. V. In the future, prof. Nemkov V.S. tried to gather all the available information about the “zebra effect” (as he called this phenomenon) and summarize it. This article continues the discussion about the effect of “striped heating”, and its manifestation in numerical modeling of induction heating of ferromagnetic bodies. A special case of the effect of “striped heating” in blackout induction heating with discrete overflow is given.
The modeling and analysis of the parameters of the non-sinusoidal modes
Authors: Sychev Yu A , Prokhorova V B , Aladin M E
Published: February 2021

The article is devoted to the analysis of the parameters of the non-sinusoidal modes. These parameters include the components of the total apparent power in the presence of the voltage and current harmonics such as the voltage distortion power, the current distortion power, the harmonic distortion power, the fundamental apparent power. These components should be used to determine the primary source of the non-sinusoidal mode formation during the proper selection of the filter devices. For this purpose the five ways of non-sinusoidal mode formation are detected and for each of them the mathematical model has been created. The dependences of the total apparent power components changing under the variation of non-sinusoidal ways are determined by means of the mathematical modeling. These dependences should be considered as the theoretical basis for the choosing and proving of the type and structure of the filter device as the part of the automated power quality control and improvement system and also for the tuning of the parameters of the existing filter devices to improve their performance.
Modeling of the process of mechanical dehydration of raw peat materials in the working tools of mining machines
Authors: Ivanov S L , Khudyakova I N , Vagapova E A , Ivanova P V
Published: February 2021

The results of physical modeling of primary dehydration of raw peat materials of the disturbed structure in a thin layer and at excavator bucket digging directly from the watered deposit at peat quarry development are presented. The areas of rational application of mechanical moisture dehydration of raw peat materials are shown, which allow assessing the quality of extracted raw peat materials and products of its processing. By results of the carried out modeling of process of moisture reduction concrete recommendations on size of the basic parameters of working bodies of mining machines are given. In particular, the sizes of press pallets for a gravitational press of primary peat pulp dehydration are selected, the rational size of a column of pallets providing the set parameters of quality of a product of processing directly on board of quarry is revealed. Modeling was carried out and on its basis recommendations on selection of parameters and design of excavator bucket, for mining and primary dehydration of excavated raw peat materials of different compaction degree were given. The presented approximated curves of the dehydration process in the bucket allowed to clarify the parameters of the mining excavator bucket ensuring the specified quality of raw peat materials at the first stage of its extraction and processing.
Improving the efficiency of the use of photovoltaic stations in the republic of Cuba
Authors: Iakovleva E V , Guerra D D
Published: February 2021

This article is devoted to the study of the reasons for the low efficiency of solar generators in the Republic of Cuba. The work provides one of the possible technical solutions to this problem. The introduction of new technological solutions requires an integrated approach that evaluates the possibility of applying more efficient technologies for capturing sunlight in specific climatic conditions of the country, as well as evaluating the economic benefits of a particular solution. Therefore, this article discusses the existing problem of low efficiency of solar power plants, due to the absence of any tracking systems for the sun. The paper presents ways to solve this problem. Also, the paper presents a model of a photovoltaic solar system generator developed in the Matlab Simulink software, which makes it possible to study the main electrical variables of the complex. The experience gained in the course of the study presented in this paper can be applied in similar studies in Russia.
Augmented reality technology as a tool to improve the efficiency of maintenance and analytics of the operation of electromechanical equipment
Authors: Koteleva N I , Zhukovskiy Y L , Valnev V
Published: February 2021

Today the industry is facing a shortage of skilled workers and an aging workforce, which will eventually lead to a loss of knowledge. But augmented reality technology can connect field workers with experts who are able to provide remote guidance in real time. The subsequent advantage is that the information obtained by AR devices can be used as accumulated successful experience in the future, which facilitates decision-making in specific business processes of the company. With AR, employees gain experience and skills much faster. This paper shows the application of augmented reality technology in the maintenance of electromechanical equipment. The main functions of the augmented reality system for servicing electrical equipment are presented, the solution to the problem of integrating an augmented reality software application with existing automation systems is shown, and the methods of interaction of the developed software module with third-party modules, for example, various analytical modules, etc. are described.
Influence of grid-orientation effect on modeling of Iraqi oil field: case studies
Authors: Hamd-Allah Sameera M. , Qader Raad Shakor , Zeinalabideen Mohammed Jawad , Tomskaya V F , Vaganov E V , Al-Bayaty Hussein
Published: February 2021

Reservoir simulation models are utilized by oil and gas companies with a purpose to develop fields. Expansions and improvements in simulation software have lessened the time to develop a model. Simulating the reservoir aims to realize fluid flow, physical, and chemical procedures happening in a hydrocarbon reservoir adequately well for the reason of improving hydrocarbon recovery under various working stipulations. Grid-orientation effects are complicated problem in numerical reservoir simulation. These influences were coming when utilized of numerical utilization mechanism to conditions characterizing physically inconstant displacement procedure. These impacts happen in an assortment simulation of inappropriate and favourable mobility ratio displacements. The current study presents a building static and dynamic model and suggests a development plan for the reservoir under study and change the orientation of the grids to examine the effects of these changes on the values of oil production rate, water cut, pressure, cumulative oil production, and recovery factor. The case studies for an Iraqi oil field which is located in the South East of Iraq. Different values of recovery factors were obtained when the orientation of the grids had been changed.
Comprehensive assessment of factors determining electricity load curves concerning enterprises of mineral resource sector
Authors: Ustinov D A , Khomiakov K A
Published: February 2021

The efficiency of enterprises run in the scope of the mineral resource sector is largely determined by the effectiveness of a power supply system. Therefore, the article sets out to supplement a new information database containing the source data basing on a mathematical model of the random process. A brief description of the mathematical model of the random process that defines normalized correlation functions and its parameters at the level of individual energy consumers is presented. A feature of the study is that consumers are considered with and without a variable speed drive. Quantitative data on the difference in the parameters of the same consumers are presented both with and without regulation. It is concluded that it is relevant to supplement the information database.