bluuebunny/crossref_metadata_2025 huggingface dataset:
A high quantum efficiency plant growth LED by using a deep-red-emitting α-Al2O3:Cr3+ phosphor
Authors: Van Quang Nguyen , Thi Huyen Nguyen , Tu Nguyen , Quang Trung Do , Duc Anh Dao , Tran Manh Trung , Hung Nguyen Duy , Viet Dao Xuan , Huy Pham Thanh
Published: June 2021

Although it has been extensively studied for decades, the α-Al2O3:Cr3+ phosphor has rarely been investigated for horticultural lighting.
Search for mid- and high-entropy transition-metal chalcogenides – investigating the pentlandite structure
Authors: Mikuła Andrzej , Dąbrowa Juliusz , Kusior Anna , Mars Krzysztof , Lach Radosław , Kubowicz Maciej
Published: June 2021

For the first time, the high entropy, transition metal-based chalcogenides are synthesized. The materials are characterized by the pentlandite structure, exhibiting promising functional properties with regard to multiple possible applications.
The unique carrier mobility of monolayer Janus MoSSe nanoribbons: a first-principles study
Authors: Yin Wen-Jin , Liu Yu , Wen Bo , Li Xi-Bo , Chai Yi-Feng , Wei Xiao-Lin , Ma Shangyi , Teobaldi Gilberto
Published: June 2021

Charge-carrier mobility is a determining factor of the transport properties of semiconductor materials and is strongly related to the optoelectronic performance of nanoscale devices.
Palladium hydride with high-index facets for enhanced methanol oxidation
Authors: Guo Xiaoyun , Hu Zheng , Lv Jianxin , Qu Jianqiang , Hu Shi
Published: June 2021

Palladium hydride with high-index facets feature a high density of atomic steps and adjusted electronic structure by incorporating hydrogen into palladium lattice, which brings about enhanced electrocatalytic activity and durability in methanol oxidation.
A novel multichromic Zn(ii) cationic coordination polymer based on a new flexible viologen ligand exhibiting aniline detection in the solid state
Authors: Zou Jia yun , Ji Jie , Fan Mei hong , Li Jia yu , Wang Hai yu , Li Guo-Dong
Published: June 2021

A novel catioic coordination polymer from Zn(ii), pyromellitic acid and a new flexible viologen ligand exhibiting multichromic properties in solid state.
Graphene enhances photosynthesis and the antioxidative defense system and alleviates salinity and alkalinity stresses in alfalfa (Medicago sativa L.) by regulating gene expression
Authors: Chen Zhao , Niu Junpeng , Guo Zhipeng , Sui Xin , Xu Nan , Kareem Hafiz Abdul , Hassan Mahmood Ul , Yan Mingke , Zhang Quan , Cui Jian , Kang Junmei , Wang Zhaolan , Mi Fugui , Karagić Đura , Wang Quanzhen
Published: June 2021

We found that regulating the gene expression of DEGs related to PSII, Cyt b6f and PSI under graphene conditions could play a key role in protecting PSI, rapidly recovering PSII, and increasing crop photosynthesis and tolerance under abiotic stress.
Synthesis of maleimide-functionalized carboranes and their utility in Michael addition reactions
Authors: Ol'shevskaya Valentina A. , Alpatova Victoria M. , Makarenkov Anton V. , Kononova Elena G. , Smol’yakov Alexander F. , Peregudov Alexander S. , Rys Evgeny G.
Published: June 2021

Carboranyl maleimides were obtained and their reactivity withS- andN-nucleophiles was demonstrated.
Comprehensive structure–activity relationship (SAR) investigation of C-aryl glycoside derivatives for the development of SGLT1/SGLT2 dual inhibitors
Authors: Xin Yunting , Zhou Shuhao , Wang Huibin , Hu Baichun , Zhang Zhigang , Wang Jian , Sun Tiemin
Published: June 2021

Multi-combined computational approaches were used to explore the SAR and design novel potential SGLT1/SGLT2 dual inhibitors.
Multi-component bioresponsive nanoparticles for synchronous delivery of docetaxel and TUBB3 siRNA to lung cancer cells
Authors: Conte Claudia , Monteiro Patrícia F. , Gurnani Pratik , Stolnik Snow , Ungaro Francesca , Quaglia Fabiana , Clarke Philip , Grabowska Anna , Kavallaris Maria , Alexander Cameron
Published: June 2021

Redox-responsive NPs, delivering DTX in combination with TUBB3 siRNA, increased DTX activity in lung cancer (LC) cells. After local administration in LC mice models, NPs were retained into the lungs thus exerting high siRNA silencing efficacy.
Employing defined bioconjugates to generate chemically functionalised gold nanoparticles for in vitro diagnostic applications
Authors: Richards Daniel A. , Thomas Michael R. , Szijj Peter A. , Foote James , Chen Yiyun , Nogueira João C. F. , Chudasama Vijay , Stevens Molly M.
Published: June 2021

Herein we report a versatile method for introducing functionality to gold nanoparticles by exploiting the strong interaction between chemically functionalised bovine serum albumin (f-BSA) and citrate-capped gold nanoparticles (AuNPs).
Single-atom control of electrical conductance and thermopower through single-cluster junctions
Authors: Yuan Saisai , Xu Xiaohui , Daaoub Abdalghani , Fang Chao , Cao Wenqiang , Chen Hang , Sangtarash Sara , Zhang Jiangwei , Sadeghi Hatef , Hong Wenjing
Published: June 2021

The charge transport of polyoxometalate clusters were investigated via STM-BJ technique. The electrical conductance and the Seebeck coefficients of single-cluster junctions can be significantly changed by replacing only one central atom.
Intramolecular Alder-ene cycloisomerization of cyclopropenes with alkenes to access spirocycles
Authors: Fan Peng , Liu Tian-Tian , Qu Hong-Yu , Tao Peng , Liu Chun-Xia , Liu Xiao-Qian , Shen Mei-Hua , Bao Xiaoguang , Xu Hua-Dong
Published: June 2021

An Alder-ene cycloisomerization creates 3D-shaped spirocycles from cyclopropenes.
Palladium-catalyzed divergent cycloisomerization of 1,6-enynes controlled by functional groups for the synthesis of pyrroles, cyclopentenes, and tetrahydropyridines
Authors: Ding Linglong , Deng Yi-Hui , Sun Tian-Yu , Wang Dawei , Wu Yun-Dong , Xia Xiao-Feng
Published: June 2021

A palladium-catalyzed divergent cycloisomerization of 1,6-enynes controlled by functional groups was developed, leading to functionalized pyrroles, cyclopentenes, and tetrahydropyridines.
Chiral supramolecular polymerization of dicyanostilbenes with emergent circularly polarized luminescence behavior
Authors: Yin Yueru , Chen Ze , Han Yifei , Liao Rui , Wang Feng
Published: June 2021

A novel type of circularly polarized luminescence (CPL) active systems have been constructed via chiral supramolecular polymerization of dicyanostilbene-based monomers.
Chemo- and enantioselective hetero-coupling of hydroxycarbazoles catalyzed by a chiral vanadium(v) complex
Authors: Sako Makoto , Higashida Keigo , Kamble Ganesh Tatya , Kaut Kevin , Kumar Ankit , Hirose Yuka , Zhou Da-Yang , Suzuki Takeyuki , Rueping Magnus , Maegawa Tomohiro , Takizawa Shinobu , Sasai Hiroaki
Published: June 2021

The catalytic enantioselective oxidative hetero-coupling of arenols using a chiral vanadium(v) complex has been developed.
Simple practical method for synthesis of trisubstituted imidazoles: an efficient copper catalyzed multicomponent reaction
Authors: Kadu Vikas D. , Mali Ganesh A. , Khadul Siddheshwar P. , Kothe Gokul J.
Published: June 2021

A rapid practical process has been developed for synthesis of 2,4,5-trisubstituted-imidazoles in excellent yields up to 95% from readily available starting materials.
Sensing mechanism of a new fluorescent probe for hydrogen sulfide: photoinduced electron transfer and invalidity of excited-state intramolecular proton transfer
Authors: Liu Xiumin , Qi Yutai , Pu Shenhan , Wang Yi , Gao Ziqing
Published: June 2021

Our theoretical results show that the fluorescence quenching of DFAN is caused by PET mechanism and the large Stokes shift fluorescence emission of DFAH is not due to the ESIPT mechanism. Due to the absence of PET process, enol structure emits strong fluorescence, which is inconsistent with the fluorescence mechanism in the experiment.
Dual-ion substituted (MeY)3(AlSi)5O12:Eu garnet phosphors: combinatorial screening, reductive annealing, and luminescence property
Authors: Zheng Zhehan , Deng Mingxue , Wang Caiyan , Zhang Xiang , Liu Qian , Xu Xiaoke , Gao Le
Published: June 2021

A new strategy of the combination double substitution of cations and annealing creates the coexistence of activator Eu-ions with a mixed-valence state.
Chemical vapour deposition (CVD) of nickel oxide using the novel nickel dialkylaminoalkoxide precursor [Ni(dmamp′)2] (dmamp′ = 2-dimethylamino-2-methyl-1-propanolate)
Authors: Wilson Rachel L. , Macdonald Thomas J. , Lin Chieh-Ting , Xu Shengda , Taylor Alaric , Knapp Caroline E. , Guldin Stefan , McLachlan Martyn A. , Carmalt Claire J. , Blackman Chris S.
Published: June 2021

We describe CVD of nickel oxide (NiO) thin films using a new precursor [Ni(dmamp′)2], synthesised using a readily commercially available dialkylaminoalkoxide ligand (dmamp′), which is applied to synthesis of a hole transport-electron blocking layer.
Photocatalytic and antibacterial activities of Tl–Hg–I nanocomposites: sonochemical synthesis and characterization
Authors: Abkar Elham , Hassanpour Mohammad , Amiri Omid , Ghanbari Mojgan , Salavati-Niasari Masoud
Published: June 2021

In this work, Tl4HgI6/HgI2 nanocomposites were synthesized by a rapid ultrasonic method. The photocatalytic properties of the nanocomposites were evaluated for the first time. Photocatalytic properties were performed for six industrial dyes.
[2 + 2 + 1] Cycloaddition of N-tosylhydrazones, tert-butyl nitrite and alkenes: a general and practical access to isoxazolines
Authors: Ma Liang , Jin Feng , Cheng Xionglve , Tao Suyan , Jiang Gangzhong , Li Xingxing , Yang Jinwei , Bao Xiaoguang , Wan Xiaobing
Published: June 2021

A novel [2 + 2 + 1] cycloaddition of N-tosylhydrazones, tert-butyl nitrite and alkenes was successfully established, which allowed facile construction of a wide range of isoxazolines.
Understanding the mechanism of direct visible-light-activated [2 + 2] cycloadditions mediated by Rh and Ir photocatalysts: combined computational and spectroscopic studies
Authors: Jung Hoimin , Hong Mannkyu , Marchini Marianna , Villa Marco , Steinlandt Philipp S. , Huang Xiaoqiang , Hemming Marcel , Meggers Eric , Ceroni Paola , Park Jiyong , Baik Mu-Hyun
Published: June 2021

The mechanism of [2 + 2] cycloadditions activated by visible light and catalyzed by bis-cyclometalated Rh(iii) and Ir(iii) photocatalysts was investigated, combining density functional theory calculations and spectroscopic techniques.
Combined electrochemical and DFT investigations of iron selenide: a mechanically bendable solid-state symmetric supercapacitor
Authors: Pandit Bidhan , Rondiya Sachin R. , Shegokar Shyamal , Bommineedi Lakshmana Kumar , Cross Russell W. , Dzade Nelson Y. , Sankapal Babasaheb R.
Published: June 2021

Graphene analogous nanoflakes morphology of iron selenide for advanced flexible solid-state symmetric supercapacitor.
Separation enhanced methanol and dimethyl ether synthesis
Authors: van Kampen Jasper , Boon Jurriaan , van Sint Annaland Martin
Published: June 2021

Recent developments in separation enhanced reaction processes using membranes and adsorbents, highlighted here, have proven their potential for carbon dioxide conversion to methanol and dimethyl ether.
Network intrusion detection using machine learning approaches: Addressing data imbalance
Authors: Ahsan Rahbar , Shi Wei , Corriveau Jean‐Pierre
Published: June 2021

Cybersecurity has become a significant issue. Machine learning algorithms are known to help identify cyberattacks such as network intrusion. However, common network intrusion datasets are negatively affected by class imbalance: the normal traffic behaviour constitutes most of the dataset, whereas intrusion traffic behaviour forms a significantly smaller portion. A comparative evaluation of the performance is conducted of several classical machine learning algorithms, as well as deep learning algorithms, on the well‐known National Security Lab Knowledge Discovery and Data Mining dataset for intrusion detection. More specifically, two variants of a fully connected neural network, one with an autoencoder and one without, have been implemented to compare their performance against seven classical machine learning algorithms. A voting classifier is also proposed to combine the decisions of these nine machine learning algorithms. All of the models are tested in combination with three different resampling techniques: oversampling, undersampling, and hybrid sampling. The details of the experiments conducted and an analysis of their results are then discussed.
Distribution line parameter estimation driven by probabilistic data fusion of D‐PMU and AMI
Authors: Xiao Mengmeng , Xie Wei , Fang Chen , Wang Shaorong , Li Yan , Liu Shu , Ullah Zia , Zheng Xuejun , Arghandeh Reza
Published: June 2021

This paper proposes a novel distribution line parameter estimation method, driven by the probabilistic data fusion of the distributed phasor measurement unit (D‐PMU) and the advanced measurement infrastructure. The synchronized and high‐precision D‐PMU is utilized to tackle the challenge risen by the a‐synchronization of smart meters. Correspondingly, a time‐alignment algorithm is proposed to obtain the time‐synchronous error (TSE) dataset for the up‐stream smart meter. The non‐parametric estimation method is performed then to evaluate the probabilistic density curve of TSE. Furthermore, TSE data of down‐stream smart meters are generated by implementing the acceptance‐rejection process based on the obtained probabilistic density curve. Leveraging the generated TSE dataset, a new time‐shifted D‐PMU curve is probabilistically aligned or fused with the down‐stream advanced measurement infrastructure curves. According to the complete voltage drop model, the line parameter estimation of resistance and reactance is formulated as a quadratic programming problem and solved by Optimal Toolbox in MATLAB by conducting multi‐run Monte‐Carlo simulations under various scenarios. Simulation results demonstrate the effectiveness and robustness of the proposed methodology.
Road extraction from high resolution remote sensing image via a deep residual and pyramid pooling network
Authors: Han Yibo , Han Pu , Jia Manlei
Published: June 2021

The road extraction from high resolution remote sensing image is of great importance in a variety of applications. Recently, the abundant deep convolutional neural networks are proposed for road extraction task. However, the existing approaches lack suitable strategy to utilize multiple views road features for road extraction, which fails to extract road with smooth appearance and accurate boundary under complex scenes. To address this problem, the authors propose a novel deep residual and pyramid pooling network (DRPPNet) for extracting road regions from high resolution remote sensing image. The DRPPNet consists of three parts: deep residual network (DResNet), pyramid pooling module (PPM) and deep decoder (DD). Specially, the DResNet uses several residual blocks to extract deep road features from input images, which can enhance learning ability of DRPPNet and avoid gradient vanish. Then, PPM is proposed to fuse road features from multiple views and it aims to address disadvantage of single view feature. Finally, the DD is used to recover size of feature maps to input size. Extensive experiments on two challenging road datasets demonstrate that proposed method outperforms the state‐of‐the‐art methods greatly on performance of road extraction task.
Roadside pedestrian motion prediction using Bayesian methods and particle filter
Authors: Xu Qing , Wu Haoran , Wang Jianqiang , Xiong Hui , Liu Jinxin , Li Keqiang
Published: June 2021

Accidents between vehicles and pedestrians account for a large partition of severe traffic accidents. So, pedestrian motion prediction becomes a major concern for intelligent vehicles. However, current researches often neglect pedestrian behaviour and/or intention in motion prediction. Meanwhile, related works are scattered and divided into many small fields. No integrated system is proposed to connect the task of perception and decision. To solve these problems, a pedestrian motion prediction model is proposed in this paper. The proposed method predicts pedestrian motion based on the combination of pedestrian crossing behaviour and intention. Pedestrian behaviour is recognized using the Bayesian posterior model, and pedestrian intention is recognized by the dynamic Bayesian network. A modified particle filter and a behavioural motion model are used to integrate the behaviour and intention into motion prediction. The effectiveness of the proposed method is verified in our provided BPI dataset with eight typical scenarios defined by road type, vehicle velocity etc. The results show that this method can give an accurate distribution of pedestrians’ future trajectories.
Joint phase error estimation and sparse scene restoration algorithms for frequency agile radar
Authors: Fei Zhiting , Zhang Jindong , Zhu Xiaohua , Ding Xun
Published: June 2021

Frequency agile radar (FAR) systems have been demonstrated to have outstanding performance in electronic counter‐countermeasures (ECCM). With increased bandwidth in which FAR can switch carrier frequency, the phase errorswill appear at the corresponding frequency point, resulting in the decrease of coherence of the system. To accomplish phase error correction and range and velocity information extraction of the target simultaneously, a joint phase error estimation and sparse scene restoration algorithm based on sparse recovery (JPSA‐SR) is proposed here. To further reduce the computational complexity of the algorithm, a joint phase error estimation and sparse scene restoration algorithm based on alternating direction method of multipliers (JPSA‐ADMM) is also proposed. Numerical examples show the effectiveness of the proposed algorithms.
Necessary optimality conditions for minimax optimal control problems with mixed constraints
Authors: Patzi Aquino Paola Geovanna , de Pinho M.d.R. , Silva Geraldo Nunes
Published: June 2021

A weak maximal principle for minimax optimal control problems with mixed state-control equality and inequality constraints is provided. In the formulation of the minimax control problem we allow for parameter uncertainties in all functions involved: in the cost function, in the dynamical control system and in the equality and inequality constraints. Then a new constraint qualification of Mangassarian-Fromovitz type is introduced which allowed us to prove the necessary conditions of optimality. We also derived the optimality conditions under a full rank conditions type and showed that it is, as usual, a particular case of the Mangassarian-Fromovitz type condition case. Illustrative examples are presented.
Time-varying Response Analysis of Spur Gear System
Authors: Li Chao , Liu Hongwei
Published: June 2021

In this paper, a space-driven two-stage spur gear system is taken as the research object, and a 10 DOF dynamic model is established. Considering the high load characteristics of the space drive system and the time-varying stiffness and tooth clearance of the gear system, a nonlinear dynamic response analysis was performed. The characteristics of the vibration acceleration, shock and transmission error of the gear system are studied in this paper. This paper analyzes the relationship between backlash and return difference, and derives the theoretical formula between the two. The time-varying stiffness was corrected to make the theoretical model closer to reality. The research in this paper enriches the study on space drive systems and high load gear systems.
Transmit the heat of rivers to surface seawater
Authors: Yang Dongfang , Wei Linzhen , Feng Ming , Zhang Shengjun , Yang Danfeng
Published: June 2021

Based on the survey materials of the waters of Jiaozhou Bay in April and August 1981, this article studies the water temperature and horizontal distribution in the surface waters of Jiaozhou Bay. The results have showed that the water temperature ranged within 7.52–30.90°C in April and August, and the length of interval of water temperature was 23.38°C. The water temperature of the ocean was above 7.00°C. It indicated that the water temperature of the entire water body of Jiaozhou Bay was relatively high in April and August, in terms of the changes of water temperature. In April, the water temperature in the water body of Jiaozhou Bay ranged within 7.52–13.70°C, and the length of temperature interval was 6.18°C. In Jiaozhou Bay, from the northeastern coastal waters along the northern coastal waters to the northwestern coastal waters, the range of water temperature changes was 12.82–13.70°C, and the interval length of seawater temperature changes was 0.88°C. From the northern area to the southern area, the range of water temperature changes was 7.52–13.70°C, and the interval length of seawater temperature was 6.18°C. In August, the range of water temperature changes was 24.60–30.90°C, and the interval length of seawater temperature was 6.30°C. In the eastern area of Jiaozhou Bay, the water temperature in the coastal waters of the estuary of Jiaozhou Bay was 30.90°C, forming a high temperature area. In the coastal waters of Jiaozhou Bay from the northwest to the north, the range of water temperature changes was 27.32–27.37°C and the interval length of seawater temperature was 0.05°C. In April and August, the increase of water temperature in the coastal waters from the northeast along the north to the northwest of Jiaozhou Bay was mainly caused by the shortwave radiation from the sun and sky and the longwave radiation from the atmosphere which continuously offered heat to the seawater. In April, it formed a circular water area with low temperature centered with the central water area of Jiaozhou Bay, whose water temperature ranged within 7.52–8.51°C. Thus, there was no heat source to provide heat to the central waters of Jiaozhou Bay, resulting a loop-locked low water temperature area in the center of the bay. In August, in the eastern part of Jiaozhou Bay, that is, the coastal waters in the estuary of Haibo River, the water temperature reached a relatively high value, 30.90°C. The source of the increase in water temperature was the transportation of heat from Haibo River, which transferred the heat of the river to the surface seawater.
Experimental study on the shape of plunge pool in the Horizontal Swirl Spillway Tunnel
Authors: Zhou Heng , Li Hui , Xing Ruijiao , Guo Xinlei , Wang Haitao , Di Shengjie
Published: June 2021

According to the study on the shape of plunge pool in the horizontal swirl spillway tunnel, the design scheme of a plunge pool with better energy dissipation effect is proposed. Based on the hydraulic physical model test, which includes atmospheric pressure and decompression tests, and combined with the different design scheme of a plunge pool, measurement results of fluctuating pressure. Main frequency and sidewall pressure are analysed. The results show that the inlet section of the plunge pool is connected by a gradual variable section which length of gradient segment 6m. The shape of the gradient section is a long round variable gate hole. To improve the side wall pressure, the inlet section is increasing from 6.0m to 14.0m. Finally, the proposed plunge pool has the advantages of simple design and convenient construction, and these studies provide reference and support for the design of hydropower dams in western China.
Pre-stack Time Migration Processing for Block A of Putaohua Oilfield
Authors: zhiyuan Wang
Published: June 2021

According to the reservoir and structural characteristics of Heidimiao, this paper combines fine pre-stack pre-processing and small-panel pre-stack time migration, and optimizes targeted methods and parameters to obtain the seismic data with higher resolution and better amplitude retention. Compared with the previous processing results, the migration imaging of the new data has been improved, and the geological phenomenon of the whole area is clear. The fracture system is reasonable, the fracture points are crisp, and the imaging of small faults is clear. The wave group characteristics of the new treatment are obvious, and the transverse resolution, longitudinal resolution and signal-to-noise ratio are improved obviously. By using relative amplitude preserving and VTI pre-stack time migration, the signal to noise ratio and resolution of seismic processing results have been greatly improved, and the interlayer information is more abundant, which can meet the needs of target interpretation.
Application of Remote Sensing Technology in Ecological Engineering—A Case Study of Phase I Tao River Water Diversion Project
Authors: Cheng Jiao Xiao
Published: June 2021

This paper aims to explore the implementation of the ecological restoration and water and soil loss control measures proposed in engineering design & research, environmental impact assessment report and approval document with respect to the construction and environmental management of a project case, and to put forward the remedial measures and suggestions for the existing problems. The application of remote sensing technology to the eco-environment monitoring in the pre-construction phase, construction phase and operation phase of Phase I Tao River Water Diversion Project was studied. It was obtained that all disturbed areas of this project already reached the levels before the construction by combining biological control measures and vegetation measures. The ecosystem structure, processes and functions in the project construction area did not exert any great impact. The ecological environment in the project area was fragile with poor quality, and could be easily deteriorated due to the disturbance of human activities. The changes in the area and pattern of ecosystem in the project area were influenced by this project to a very small extent. The quality of natural ecological environment before the construction was basically recovered through its ecological restoration measures, and the current ecological restoration benefit was favorable. Therefore, the remote sensing technology is capable of technically demonstrating whether a project meets the acceptance conditions for environmental protection upon completion and providing basis for the follow-up application of remote sensing technology in eco-environmental investigation.
Application of ground penetrating radar in concrete defect detection of sluice floor
Authors: Wu Ye , Yong-xia Wei , Ming-xian Xu , Lin-xiang Ye
Published: June 2021

The defect investigation of sluice floor is an important measure to ensure the safe operation of the sluice. due to the traditional drilling methods will cause damage to the sluice floor, and the appearance inspection and compressive strength test can not evaluate the internal defects of reinforced concrete in the sluice floor. In this paper, we apply the ground penetrating radar(GPR) to the concrete quality inspection of a sluice gate in a seawall. And we describe the layout, detection principle and data processing flow of GPR. Then we simulate the propagation characteristics of radar electromagnetic wave in the presence of twodimensional electrical anomaly bodies by finite difference method. Through analyzing the amplitude, frequency and event characteristics of reflection wave shown in the gray map of GPR profiles, we determine the dividing line between concrete and muddy silty clay, finding out the density of steel in concrete, framing the location of construction joints and suspected water-filled gaps.
Application of Drones in the Whole Life Cycle of Engineering Construction Project
Authors: Qiu Houjie
Published: June 2021

With the rapid development of information technology, unmanned aerial vehicle (UAV), as a new and popular technology, has also been tried in the field of engineering construction. In this paper, through the application of UAV technology in Australia's large-scale project to extinguish mountain fire, the application effect of UAV in the whole life cycle of engineering construction project is analogized. UAV assisted project progress, management quality and safety and other aspects, so that managers can timely and efficiently understand the situation of the project site, and effectively improve the management's control over the project construction, indicating the future application prospect of UAV technology in the construction field.
Study the effect of vibration mixing on the performances of full replacement recycled aggregate concrete
Authors: Li Taotao
Published: June 2021

It is an urgent problem that the construction solid waste is difficult to be treated, and its recycling provides a way for its treatment. The quality of construction solid waste recycled aggregate is lower than that of natural aggregate, which limits its extensive application in building materials. In order to provide a new method for engineering application of recycled aggregate concrete, the influence of vibration mixing on the performances of full replacement recycled aggregate concrete were studied. The performance indexes of recycled aggregate concrete under ordinary mixing and vibration mixing were compared and analyzed. The experimental results show that compared with natural aggregate concrete, the slump of full replacement recycled aggregate concrete decreased by 58.8%, and 7d and 28d compressive strength decreased by 12.9% and 16.1%, and the splitting strength decreased by 30.6% and 20.1%, and the carbonation depth decreased by 91.5%; Compared with natural aggregate concrete using ordinary mixing, the slump of full replacement recycled aggregate concrete using vibration mixing decreased by 50.9%, the 7d and 28d compressive strength decreased by 6.9% and 10.9%, and the splitting strength decreased by 16.9% and 12.4%, and the 28d carbonation depth decreased by 34.9%. The results show that compared with ordinary mixing, vibration mixing can improve the performance of recycled aggregate concrete, which provides a reference for engineering application.
Investigation on the Current Situation of Reuse of the Exterior Windows of the Modern Complex in Zhongshan Square, Dalian
Authors: Tianjiao Shen
Published: June 2021

Exterior windows are architectural details with decoration, lighting and ventilation. By studying the current situation of the reuse of the exterior windows of the modern complex and making a survey of several representative windows, this paper analyzes and finds that the reuse of buildings in this area is quite different, but the overall situation is relatively good. The purpose of this investigation is to explore the advantages and disadvantages of the methods of reuse, in order to find a way that can realize the balance between the man and buildings.
Improving the assessment of the environmental and economic efficiency of measures
Authors: Bandurina Inna P. , Bandurin Mikhail A. , Bandurin Alexander P.
Published: June 2021

The purpose of the study is to improve methods for improving the regulatory and methodological framework for assessing the environmental and economic effectiveness of land reclamation investment projects. The research methodology is based on the Monte Carlo method, which corresponds to international standards, the theory and algorithms of innovative methods for determining risks, as well as the ability to provide the user with information about the content of risk assessment operations and ensure that their preferences are taken into account in the calculation process. Currently, many tools have been developed for automating risk analysis procedures, including those performed by the Monte Carlo method, which are described in various studies with varying degrees of completeness. The analysis of priority methods of assessing the risks of achieving the projected economic indicators of project solutions is performed and the prospects of the simulation method for practical use in the field of land reclamation are shown. The results of the risk assessment of environmental and economic efficiency of anti-filtration coatings of hydraulic structures of irrigation systems performed by the Monte Carlo method in the environment of the Crystal Ball software product are presented, and the need to improve the reliability of the predicted results of the effectiveness of the designed measures is established. Future research is risk assessment of profitability of the designed activities promote the development of existing and formation of new theories to justify the feasibility of implementation of reclamation investment projects.
Differentiation of normative standards of budgetary appropriations for the maintenance of winter roads in the North of Russia
Authors: Grigoryeva Elena Eduardovna , Grigoryev Evgeniy Petrovich
Published: June 2021

The article discusses the results of a study of the issues of maintaining highways of regional and intermunicipal importance in the northern regions of Russia. A special role in the article is given to the category of highways as land and ice winter roads. In the hard-to-reach areas of the Arctic and North of Russia, winter roads are the most important element of the transport system. The maintenance and service of winter roads are the responsibility of the regional authorities. The existing issue of insufficient budgetary support for the maintenance of winter roads is, inter alia, associated with the imperfection of the methodology for calculating target norms of budgetary appropriations. The article presents well-reasoned facts and substantiation of the need to update the norms of budgetary appropriations for the maintenance of winter roads, taking into account difficult territorial natural and climatic conditions of work and transport accessibility of goods delivery. Recommendations are given for changing the methodology for calculating monetary costs for the maintenance of winter roads of regional and intermunicipal importance when determining the amount of appropriations from the budget of the constituent entities of the Russian Federation.
Development of management abilities of motor transportation companies’ leaders
Authors: Chernetskaya Nadezhda I. , Kedyarova Elena A. , Monzhievskaya Vera V. , Uvarova Margarita Yu.
Published: June 2021

The paper presents main ways of development of management abilities of motor transportation companies’ leaders. Summary of modern investigations devoted to development of management abilities in made. Peculiarities of management abilities is motor-transportation branch are shown. The study devoted to personal traits of motor transportation leaders that can be a factor of their better quality and higher effectiveness at work is done and its results are presented. It was proved that several personal traits give the basis of a better quality at work of motor transportation leaders: activity, communicativeness, persistence, stress tolerance, purposefulness, and absence of the role conflict at work. These traits and qualities can be taken as a basis when we decide to develop management abilities of motor transportation leaders. At the particular motor transportation company in Irkutsk (Siberia region) where the investigation was done the majority of leaders have these traits and qualities at much lower level than it is required. As a result, the developing program for them was proposed. This program included the description of conditions on which the developing work can be done effectively and the content of the developing work itself. The proposed and tested program consists of four blocks including developing, modelling and correcting psychological technologies that taken in common had shown a significant shift of management abilities of motor transportation leaders.
Strategies of developers to housing supply within framework of project financing
Authors: Grushina Olga V. , Shelomentseva Natalya N.
Published: June 2021

The problem of providing comfortable and affordable housing for Russian citizens as a national goal has gained an impetus to solution after the introduction at the legislative level of project financing for housing construction using escrow accounts. The application of this new method of financing to the decision-making algorithm of a developer requires mathematical modeling of the economic ratios of the main indicators of the developer’s activities, taking into account the interests of other subjects in the housing construction sector: banks and population. The approach proposed by the authors is aimed primarily at expanding the supply in the housing market. We have formalized the possible sale strategies of the developer using a matrix approach in varying prices and the number of meters sold at different stages of construction, as well as interest rates for bank crediting, depending on the degree of escrow accounts accumulation. Testing the model has shown that developers should face serious problems related to increasing the cost of replenishing working capital for the construction process, which will inevitably be included in the price per square meter of housing and paid by the consumer (population). At the same time, banks become the main controllers and beneficiaries of the project financing. The model developed and tested by the authors will allow construction organizations to overcome the first difficulties of project financing application and competently and consistently make a choice of a strategy for offering housing to buyers, taking into account the variability of the economic parameters of all parties.
Development of a system of transport-interchange hubs in urban transport network
Authors: Moskvichev Oleg V. , Leonova Svetlana A.
Published: June 2021

The paper considers the issues of the formation of a system of transport interchange hubs (TIH), associated with the determination of the location of TIH in order to improve the quality of the provided transport services. The model of the optimal choice of TIH system is presented in the form of a linear Boolean programming problem. The paper gives the factors that reduce the average travel time around the city due to the formation of a system of transport hubs. In order to solve the problem of the choice of TIH locations, the approach based on the definition of “effective interchange hubs” is proposed. The determination of effective interchange hubs is carried out according to the following algorithm. First we found a list of non-stop (direct) rides. Then, we consider the rides for which there is no direct route or for which there is such a route, but this revealed connecting route will take less time. These hubs are efficient. Next, a list of effective interchange hubs is determined and the amount of passenger traffic at each hub is specified. Using mathematical methods to solve integer programming problems, it is possible to select such efficient interchange hubs, in which it is advisable to create transport interchange hubs. These scientific results can be used in programs and projects for the development of urban transport systems in the development of basic requirements for the formation of transport hubs.
Healthcare financing in Russia: mechanism and assessment of regional budget opportunities
Authors: Faiberg Tatyana V. , Shcherbakova Irina N.
Published: June 2021

In the difficult economic conditions in Russia, caused, as in the all countries, by the consequences of the coronavirus pandemic, the search for additional government revenues is becoming especially relevant. All possibilities of cutting budget expenditures are being considered, including the optimization of the number of civil servants. The deputies of the State Duma of the Russia over the past month have been actively discussing the effectiveness of the functioning of state extra-budgetary funds and expressing ideas about the abolition of the Pension Fund of Russia and others, with the simultaneous return of functions back to the federal budget. It is important to reasonably assess the effectiveness of the financial mechanism of each extra-budgetary fund in Russia, including the Federal and Territorial Compulsory Medical Insurance Funds. To this end, it is necessary to comprehensively consider the mechanism of financing health care in the country within the framework of the current budget-insurance model. This article reveals the features of the financial mechanism in the healthcare sector in Russia, primarily in terms of methods for the formation of financial resources. In general, the Russian health care system is financed by the country’s budgets, Compulsory Medical Insurance Funds, voluntary medical insurance and paid medical services. In accordance with this, the budget, insurance and market methods for the formation of financial resources in health care are identified. The article describes each method; the effectiveness of the current financial mechanism was assessed and recommendations for its improvement were proposed.
NSR and NSTC projects: environmental and economic efficiency assessment of the goods’ overseas transportation
Authors: Nikonorov Sergey , Krivichev Alexander , Sidorenko Vladimir
Published: June 2021

The authors attempt to assess the environmental and economic efficiency of investment projects for the goods transportation by the northern seas of Russia taking into account the relevance of the topic of cargo transportation by means of the “Northern Sea Route” (NSR) and new concept of the digital format of the “Northern Sea Transit Corridor” (NSTC) implemented by the “Rosatom” State Corporation. The structure of import-export and transit traffic by the NSR in 2020 is considered. The goal of the article is to evaluate the efficiency of investment project for the goods transportation forwards and backwards by the NSR from Murmansk city to PetropavlovskKamchatsky city using the example of the “Andrey Osipov” shipping facility. Some indicators were assessed: planned revenue, payback period; NPV, environmental damage. The following results are obtained: the payback period is 10 years; by using the naval fuel oil over a ten-year period, 1101.6 tons of SOx, 143.1 tons of CO2, 288.9 tons of NOx will be emitted. In addition, the authors propose an innovative approach to creation of ships from new materials and technologies based on the modern paradigm of “Accelerated Digital Certification”.
Construction of the Irkutsk-Baikal section of the trans-Baikal railway: state of research
Authors: Tretyakov Valery V. , Petrushin Yuri A. , Nekludova Anastasia V. , Yakovleva Elena A.
Published: June 2021

The article considers the problems of railway construction in Russia in the 19th and early 20th centuries and finds out the available information on one of the fragments of this grandiose construction in the historical literature. Attention is focused on the construction history of one of the important sections of the Trans-Siberian railway – the Irkutsk-Baikal branch railway, which became the foundation of the Circumbaikal railway. This part of the Great Siberian Railway proved to be a very technically complex construction facility and required significant investments from the state. However, it was not easy to approach to its construction. Its creation was preceded by the work of numerous research teams, selfless labour of designers, engineers, technicians and workers. Thanks to their efforts, our country ultimately managed to establish a continuous rail transportation service and unite the western and eastern parts of Russia, which made it possible to maintain the country’s defense capability during the sudden outbreak of the Russian-Japanese War of 1904–1905. The authors specify the main problems that arise when studying the history of the construction and operation of the Irkutsk-Baikal line. They define the range of sources put into circulation by researchers of the designing and construction processes of this road. It is emphasized that the largest number of sources relate to the creation of the line, while the sources which deeply reflect the line operation are few and fragmented.
Evaluation of the return of investments in transport route development
Authors: Malakhova Ulyana I. , Vinichenko Victoriya A.
Published: June 2021

The network of Russian railways provides the movement of goods and passengers both within the country and in the context of international transport, through which goods from different countries go in transit. In Russia the railway lines are double-track and fully electrified on the main directions of the EastWest transport corridor. The modernization of the branches from the Trans-Siberian railway to the state border with China and Mongolia continues. The paper describes the business model of the project, the corresponding calculations for managerial decisions on the launch of a direct train route Novosibirsk – Urumqi and return. During the study, the monitoring of existing routes of passenger traffic was carried out: the capacity of railway routes, frequency, duration and capacity of alternative crossings. The result of the study is a developed model for launching a project of a direct connection between Novosibirsk and Urumqi and return. The paper describes the stations that are of particular importance for the route – the place of customs inspection, rearrangement of wheel sets of cars due to the different wheel gauge of neighboring countries. The result of the study is a multifunctional model of a transport route that allows analyzing the economic parameters of any route of a railway communication. According to the model, it is possible to analyze various parameters of the revenue side of the project, calculate the amount of investments and indicators for the assessment of the effectiveness of real investments.
Federal and regional standards for highways maintenance and repair costs
Authors: Filippov Dmitry , Grigoryeva Elena
Published: June 2021

The current conditions of Russian territories road infrastructure, regional budgetary funding, differences in economic potential and the economy structure of the constituent entities of the Russian Federation determine the relevance of the development and improvement of the regional regulatory base. This is important in the field of tariff policy, one of the elements of which is the approval of basic standards and rules for calculating the amount of budgetary funds for capital repairs, repairs and maintenance of regional road network. This article is devoted to the study of the regional practice that has developed in the Russian Federation for the establishment of standard costs for capital repairs, repairs and maintenance of regional and intermunicipal roads in comparison with federal ones. The work consists of two logically related structural elements: an overview and an analytical part. The review revealed the differentiation of the size of budgetary allocations in the context of subjects and federal districts. In the analytical part, an attempt is made to determine the closeness between federal and regional standards and, as a result, to identify the range of regions that practice linking regional standards to federal ones.
Digital transformation of education in the Arctic: case of North-Eastern Federal University
Authors: Ivanov Petr , Savvinov Vasiliy , Ivanova Raisa
Published: June 2021

The article presents the case of developing a program for the digital transformation of higher education in the northern territories of the Russian Federation through the example of the North-Eastern Federal University. It describes the principles and mechanisms of digitalization of basic processes in conditions of limited resources and remoteness from the leading scientific, educational and cultural centres. The authors suggest the development of a digital educational ecosystem to provide high quality and accessible education in remote areas.