bluuebunny/crossref_metadata_2025 huggingface dataset:
Personalized Power Consumption Control Method for Intelligent Buildings That Perceiving Speech Recognition Identity
Authors: Fang Jianjun , Liu Penghui
Published: July 2020

With the development of IoT technology, the meaning of the concept of energy conservation and environmental protection in people’s minds is also constantly changing, and it is moving towards the direction of intelligence and personalization. At present, China’s economy has entered the era of artificial intelligence. Electricity control such as building lighting has gradually changed from a single manual control to a multi-modal control. This paper designs an embedded control method based on speech recognition of personnel to achieve personalized power consumption, and improves the existing defects of intelligent power consumption in buildings such as unconfirmed operators and single decision-making factors.

The method is to extract the mel frequency cepstrum coefficient feature vector after preprocessing the speech signal; Aiming at the problem of singularity matrix in the parameter estimation of Gaussian mixture model, the modified EM algorithm was used to optimize the parameter estimation of the Gaussian mixture model to complete the identification of personnel. The experimental test results show that the system can control the electricity facilities in combination with the environmental information and realize the personalized lighting control function while confirming the identity of the personnel.
Design and research of self-propelled wave energy collecting device based on hydrogen storage by seawater electrolysis
Authors: Wu You , Dai Haihong
Published: July 2020

In view of the unstable power conversion of the existing wave power generation plant, the high cost of grid-connected power generation and the difficulty of maintenance, a self-sailing wave energy collection device based on the hydrogen storage of sea hydropower is designed. The device can sail to the wave energy-rich area by self-sailing unmanned carrier and can temporarily return to the coast in bad weather. In order to reduce the resistance of the device and improve the efficiency of wave energy collection, a folding integrated wave energy capture device is designed, and when it is captured by wave energy, the wave kinetic energy capture module and the wave potential energy capture module on the device will simultaneously collect the kinetic and potential energy generated by the wave, and when the unmanned carrier sails, the wave energy capture device will automatically be recovered on both sides of the hull. Because the power stability of wave energy conversion is weak, such as direct input into the power grid, will affect the stability of the power grid, the device through the sea hydropower de-hydrogen system, the collected wave energy into hydrogen energy and storage, improve the wave energy storage capacity, and effectively solve the problem of weak power stability of wave energy conversion.
Comprehensive performance evaluation of Chinese nuclear power listed companies based on HSE perspective
Authors: Li Zhixue , Dong Ziyu
Published: July 2020

Safe development has always been China’s most basic requirement for nuclear power companies. As China’s economy has entered the stage of high-quality development, research on the sustainable development of the nuclear power industry is still necessary. From the perspective of HSE, the article constructs an innovative system, which reflects the financial status, industry characteristics, and HSE performance of nuclear power enterprises. After taking 56 Chinese nuclear power listed companies as samples, analytic hierarchy process is used to determine the weight of index, the power coefficient method and the comprehensive analysis and judgment method is used to determine the score, which all contribute to comprehensive performance evaluation. Final research shows that financial performance is the main factor affecting the comprehensive performance of listed nuclear power companies, while HSE performance and innovation performance should be considered to improve their overall performance in the future. At the same time, suggestions for the government and energy industries are put forward.
Research on temporary plugging refracturing technology for shale gas wells
Authors: Xiao B , Jiang T X , Ding S D , Chen Z , Zhang X D , Li K D
Published: July 2020

According to the variation law of stress induced by hydraulic fractures during the initial fracturing of shale gas wells, the temporary plugging refracturing technology was studied. Based on the research on the mechanism of fracture reorientation from temporary plugging, the process parameters (such as the particle size combination of the temporary plugging agent, the temporary plugging timing, and the amount of temporary plugging agent) were optimized, and the key material for temporary plugging were evaluated. Temporary plugging refracturing technology suitable for shale gas horizontal well was initially formed. Excellent results of trial test were achieved and the production rate after refracturing was increased by 5 times compared with that before stimulation. This study can provide some reference for temporary plugging refracturing of shale gas wells.
SWOT Analysis of Offshore Wind Power Development in Guangdong Province
Authors: Huang Weilong , Feng Wei , Jiang Degao , Liu Zhixue
Published: July 2020

This paper starts with the current development situation of offshore wind power industry in Guangdong province, and uses SWOT analysis to explore the advantages, disadvantages, opportunities and threats of the offshore wind power industry in the Guangdong province. Based on the analysis, this paper gives some suggestions for the policy makers: firstly, it is necessary to create a proper management system for offshore wind power; secondly, Guangdong should enhance its own equipment manufacturing and scientific research capabilities which would benefit the offshore wind power industry; finally, an effective typhoon-damage prevention system is required.
Research on short-term load forecasting based on feature similarity using PSO algorithm
Authors: Wei Xinquan , Zheng Weiyan , Duan Xiangjun
Published: July 2020

In this paper, a short-term power load forecasting model based on feature similarity was proposed. The model can comprehensively consider the short-term load forecasting under the condition of multiple factors, such as meteorological information, holiday/workday information and other factors in a unified framework. Different values of the same characteristic have great influence on load forecasting. Therefore, hierarchical clustering algorithm is used to analyse the value of each feature dimension. Feature distance is used as feature mapping value to establish feature mapping relation table. Because different factors have different weights for load forecasting, a weighted feature similarity measurement strategy is designed. Taking the minimum residual sum of squares as the optimization objective, particle swarm optimization algorithm is used to solve the optimal characteristic weight. The validity of the model and the accuracy of load forecasting are verified by comparing the numerical simulation with the existing models.
Digital Protection and Display Research of Revolutionary Sites in Dabie Mountain Area—Taking the Dawang Temple as an example
Authors: Tao Hong , Xingxing Li , Fei Zhang
Published: July 2020

The article analyzes the status quo of digital protection at home and abroad, and takes the Dawang Temple, one of the Dabie Mountain revolutionary sites, as the research object, uses the digital technology to virtually repair it, and presents two demonstration methods of on-site display and online exhibition hall to explore and design the Dabie Mountains. The digital protection and display strategy of the revolutionary sites provides an effective reference for the protection and display of similar revolutionary sites, so that the red culture contained in the revolutionary sites can be inherited and carried forward.
Analysis on the causes of Environmental Color of Jiarong Tibetan Village—Taking Ganbao Tibetan Village in Lixian County as an Example
Authors: Zhang C Y , Luo H Y
Published: July 2020

In recent years, under the influence of the upsurge of rural tourism, some Jiarong Tibetan villages are facing the dilemma of losing the color of environmental characteristics. In order to maintain the regional color personality of Jiarong Tibetan village and deepen the local understanding of the environmental color of Jiarong Tibetan village, this paper expounds the impression of environmental color of Jiarong Tibetan village, and taking Ganbao Tibetan Village in Lixian County as an example, deeply analyzes the causes of the environmental color of Ganbao Tibetan village from three dimensions: the influence of natural conditions, the gestation of local materials and the expression of inner belief. On this basis, it quantitatively analyzes the main color tone of Ganbao Tibetan village and the color attribute values of Riyue Square.
Optimization and Upgrading of Marine Fishery Industry under the background of Rural Revitalization Strategy
Authors: Wang Meijiao , Lu Kaihong , Song Weihua , Zhang Yubin
Published: July 2020

The strategy of revitalizing the countryside was put forward in the 19th National Congress of the Communist Party of China and regards solving three rural issues as the top priority of the work of the whole party. As an important part of agriculture, marine fishery is great significance to solving three rural issues. According to the actual situation of the marine fishery industry, the optimization and upgrading of the marine fishery industry was proposed based on the current problems, and the sustainable development of the marine fishery industry is promoted in Ningbo.
Study on water cycle simulation model of multi-sources and multi-functional irrigation area based on SWAT model (II): Application of Wanyao irrigation area
Authors: Wen Jinhua , Wang Shiwu , Wang Helong , Cui Yuanlai
Published: July 2020

Aiming at the water cycle simulation in multi-sources and multi-functional irrigation area, the improved SWAT model was constructed and applied to Wanyao irrigation area, which is located in Jiangshan county, Zhejiang province. The measured data from 1990 to 2006 of the watershed outlet observation stations named Jiangshan and Daqiao were used to calibrate the model parameters, which measured data from 2007 to 2017 were used to validate the model. The correlation coefficient of verification period of monthly runoff simulation was 0.91, Nash coefficient was 0.90, relative errors of simulated results and measured data of 16 monitoring facilities in irrigation area were within 10%. The improved SWAT model simulation results were used to construct the statistical models of irrigation water consumption in Wanyao irrigation area on a monthly scale and an annual scale respectively. The mean relative error of the monthly scale model is 4.5% and the mean relative error of the annual scale model is 1.2%, which satisfy the needs of accurate water resources management.
Investigation and study on tourist toilets around large scenic areas—taking Huangshan Scenic Area as an example
Authors: Yao Lizhong
Published: July 2020

Tourist toilets which closely related to the interests of tourists and local people are an important part of the tourism infrastructure. With the process of increasing the importance of the development of large-scale scenic spots, research on the construction of tourist toilets in its surrounding areas should not be ignored. Here we took the large-scale scenic Huangshan Scenic Area as an example to investigate the situation of tourist toilets in its surrounding areas to pay attention to the construction of tourist toilets around large scenic spots and promote the overall development of tourist destinations. Our results showed that problems such as low attention, difficulty in raising funds, mismatch between supply and demand, lack of planning and poor management affect the construction of tourist toilets. Considering the necessity of strengthening the construction of tourist toilets around large scenic areas, we propose strategies for the construction of tourist toilets with multiple sources of funding, joint development, practical priority, construction of special public toilets, and formation of toilet culture. Our results provide a reference for the construction of tourist toilets around large scenic areas and the promotion of local tourism development.
Agricultural and rural ecological environment management: renewable resources evaluation, management methods and management measures1
Authors: Jia Fengling
Published: July 2020

Among agricultural and rural pollution sources, rural domestic refuse, domestic sewage, crop straw and livestock manure are recyclable renewable resources, which can alleviate non-point source pollution in agricultural and rural areas, and also produce huge economic, environmental and social benefits. Taking Tianjin as an example, the production and comprehensive benefits of these four types of pollution sources are evaluated by building models. The results showed that in 2016, the production of domestic waste, domestic sewage, crop straw and livestock manure in Tianjin were 1.31 million tons, 38.9 million tons, 3.74 million tons and 1.53 million tons. Through comprehensive utilization, these pollution sources can produce a total economic benefit of about 2.36 billion yuan, which can reduce greenhouse gas emissions by 1.94 million tons. The total amount of N and P emissions from manure to soil can be reduced by 10.8 thousand tons. In order to improve the utilization rate of renewable resources and control non-point source pollution in agricultural and rural areas, this paper proposes to construct BMPs system, control the source and end of pollution sources from engineering and non-engineering measures. Finally, some suggestions are put forward to improve the ecological environment of agriculture and rural areas.
Present status and development suggestions of carbon emission permit trading
Authors: Zong Jianfang , Sun Liang , Bao Wei
Published: July 2020

As one of the effective measures for reducing the greenhouse gas emissions, the carbon emission permit trading has drawn more and more attentions from all countries worldwide and made significant development. The emergence and development of carbon emission permit trading is reviewed in this paper, and the conditions of international carbon emission permit trading are demonstrated. The present status of China’s carbon emission permit trading is analysed, and the development suggestions regarding the construction of China’s carbon emission permit trading market is provided.
Effect of nitrogen and phosphorus transport from Yangtze estuary on Zhoushan coastal areas
Authors: Zhang G Z , Li X W , Mu J B , Zhao X , Ma J W
Published: July 2020

There are few studies on nitrogen and phosphorus dispersion from the Yangtze estuary to adjacent Zhoushan sea areas in China. This study conducted numerical calculation to simulate the nitrogen and phosphorus transport from the Xuliujing section of the Yangtze Estuary to Zhoushan coastal areas. The effect of inorganic nitrogen transport was greater than that of active phosphorus. The concentration increment of inorganic nitrogen near Zhoushan, Daishan and Qushan islands were between 0.5mg/L and 0.8mg/L. The concentration increment of active phosphate near Shengsi was about 0.015mg/L, and those in the coastal areas of Qushan, east Daishan and northeast Zhoushan were between 0.015-0.02mg/L. To the north of Qushan Island, the percentage of inorganic nitrogen increment to the background was more than 70%, and those of other coastal areas were about 50%. The percentage of active phosphate increase to the background was more than 70% in the north of Shengsi, and the coastal areas from Dayangshan to Qushan were more than 50%. Daishan Island, East Coastal area and east side of Shengsi accounted for 30%.
Effect of electric diesel particulate trap on particulate emission characteristics of light-duty diesel engine
Authors: Li Zhenguo , Jue Kunyou , Lou Diming , Zhong Xianglin , Zhang Yunhua
Published: July 2020

Based on the principle of corona discharge and electrostatic adsorption, an electric diesel particulate trap (EDPT) with high-voltage negative corona electrode structure was designed. The effect of EDPT on particulate emission characteristics of light-duty diesel engine was investigated based on engine bench test platform. The results show that at the external characteristics operating point of the engine, the trapping efficiency of EDPT for particulate number (PN) is 98.4%, and the trapping efficiency for particulate mass (PM) is 95.0%. With the increasing of exhaust flow, the trapping efficiency of EDPT for PN and PM both decreases slightly. At the load characteristics when engine speed is 1800 r·min−1, the trapping efficiency of PN and PM by EDPT are 98.9% and 95.1%, and the trapping efficiency does not change significantly with the increase of load and temperature. The effects of EDPT and DOC (Diesel oxidation catalyst)+diesel particulate filter (DPF) device on engine backpressure and particulate trapping efficiency are compared. The results show that the effect of using EDPT on engine exhaust backpressure is much lower than DOC+DPF, and the trapping efficiency for PN and PM is lower than that of DOC+DPF. From the perspective of trapping efficiency and device size, EDPT is more suitable for the exhaust gas treatment of construction machinery, agricultural machinery and factory fixed source diesel engines.
Transport modelling of sediment re-suspended during submarine cable laying operation
Authors: Wang Lele , Shao Jie , Yao Wenwei
Published: July 2020

A two-dimensional depth-averaged hydrodynamics and suspended sediment transport numerical model is presented, which is discretized with finite volume method based on a triangular mesh. It is applied to investigate the diffusion and transport characteristics of sediment re-suspended during a demonstration staged submarine cable laying across the Jintang Channel, Zhejiang Province, China. The model is validated primarily against the observed data during the spring, middle and neap tidal cycles in July 2015. The model results show well agreements between the predicted and observed processes of tidal level, velocity and suspended sediment concentration (SSC). The validated model is then applied to simulate the distribution of the tidal velocity and additional SSC during the cable laying. The results show a close relationship between the additional SSC distribution and tidal hydrodynamics.
Experimental study on water transfer of remolded loess under freezing
Authors: Zhongxiang Liu , Qiujuan Zhou , Wanjun Ye , Zhipeng Zhao
Published: July 2020

The change of the internal moisture field of the loess is an important factor for the study of the cause of the loess engineering disease, and the freezing effect has a certain effect on the change of the internal moisture field of the loess. In order to analyze the law and mechanism of water distribution in the loess under four different factors, the indoor experiments of water transfer were carried out under different temperature gradients and different temperature levels. The results show that:Under the action of freezing, the greater the temperature gradient applied on both ends of the soil sample, the farther away from the top of the steady-state freezing front, the lower the water content increment in the early stage, and the higher the water content increment in the later stage, and the more obvious the change of water content near the steady-state freezing front, the greater the total amount of water migration; For the soil samples with higher dry density, the closer the frozen front is to the top, the increase of water content in the early stage is decreasing, and that in the later stage is increasing; With the increase of the initial moisture content, the water transfer of the soil sample increases, and the position of the steady-state freezing front of the soil sample with different initial moisture content is basically the same; At different temperature levels, the lower the cold plate temperature is, the farther the frozen front is from the top. When the cold plate temperature is in a certain range, the water transfer phenomenon is significant.
Research on the method of testing the performance of equipment for industrial organic waste gas purification
Authors: Jin Huang , Hao Shen , Jinying Xi , xiaoxin Zhang , Ling Lin , Weixiang Chen , Dong Liu
Published: July 2020

The performance of industrial organic waste gas purifier is directly related to the high-quality and high-efficiency operation of industrial organic waste gas purifier. This paper discusses the significance of studying the performance measurement method of industrial organic waste gas purification device, and expounds the performance measurement items, measurement methods and calculation methods of industrial organic waste gas purification device. The study and standardization of the performance measurement methods will help the comprehensive treatment of industrial organic waste gas in China and provide technical support for the implementation of environmental protection policies.
Product Soap from Waste Cooking Oil
Authors: Li Weixin , Guan Rui , Yuan Xiaoyue , Wang Haiyang , Zheng Shuqi , Liu Lu , Chen Xiangyun
Published: July 2020

Waste cooking oil(WCO) is a good candidate as a material to make soap. It is typically cheaper than other oils. In this study, we have investigated the operation of produced soap from waste cooking oil. Phosphoric acid-hydration was provided for WCO degumming. The operating temperatures is 60°C, phosphoric acid concentration is 2% and 4% content of moisture is the optimum technology of degumming. The most favorable decoloring agent is activated clay, WCO and activated clay ratio of 100:5 at 70°C with 30 min treated time. The optimal technology of saponification is that the mass ratio of NaOH and WCO is 0.3:1, saponification temperature is 100°C and the concentration of NaOH is 30%.
Investigation of flow model and flow behavior in typical fractured-vuggy structure of carbonate reservoirs
Authors: Xiaobo Li , Min Yang , Qing Li , Yuewu Liu
Published: July 2020

The storage space and pore structure of fractured-vuggy carbonate reservoirs are complicated. This paper analyzed the flow model for different storage spaces in such reservoir, and proposed the model of free and porous media coupled flow, which is a transition flow pattern between free flow and Darcy flow. The applied flow model for simulation study was the corrected Brinkman equation. Based on the CT scanning images of cores obtained from Tahe Oilfield, we constructed the 3-D digital core and then extracted the distinct factured-vuggy structures. The COMSOL Multiphysics software was employed to simulate pressure field, velocity field, and streamline of single-phase flow in fracture-vuggy area under different differential pressures. Applying three different flow models, we investigated the fluid flow behaviors of free flow, Darcy flow, and free and porous media coupled flow, respectively.
Research on the Temporal and Spatial Pattern of Carbon Emissions of Civil Buildings in Chinese Provincial Cities
Authors: Liu Jing , Yang Tianjiao , Yang Tianyue , Liu Shanshan
Published: July 2020

Based on the statistical data of energy consumption of 30 provinces in China, the carbon emissions of urban civil buildings in China’s 30 provinces from 2006 to 2017 were calculated. Secondly, the tendency value method was used to analyse the changes in carbon emissions of buildings across the country. Spatial distribution of trends and growth rates, using ArcGIS10.5 to analyse the spatial correlation and spatial agglomeration of building carbon emissions across the country, calculating the Global Moran’s I and Local Moran’s I of building carbon emissions data, verifying there is a positive spatial correlation between the carbon emissions of urban civil buildings in 30 provinces in China, and distinguishing the four types of agglomeration of high-high agglomeration, low-low agglomeration, high-low agglomeration, low-high agglomeration types of regional distribution. Finally, this paper provides some emission reduction recommendations for different regions.
Analysis of Stiffening Girder Erection Scheme of Single Tower and Single Span Asymmetric Suspension Bridge
Authors: Wei Jiaxu , Dai Rongwei , Zhang Chonghou , Zhu Xiaojing , Liu Ruidi
Published: July 2020

The paper analyzes four different stiffening girder erection schemes of a single tower and single span asymmetric suspension bridge with the main span of 766m by using parameter analysis combined with finite element numerical simulation. Firstly, this paper proposes two methods to study the reasonable erection time of ground anchor suspender cables, and based on the Midas/Civil finite element software, the erection time of ground anchor suspender cables with four schemes is determined by using backward-calculation analysis method. Then the main cable deformation, cable saddle displacement, horizontal inclination of main cable, internal force of suspender cables and dynamic performance of different schemes are compared. The results show that for Scheme 3 adopted in the project, the deformation of main cable is the smallest, the change of the cable saddle displacement is more slowly, the horizontal inclination of the main cable is smaller, and the bending stiffness is larger. However, the torsional stiffness is small and the flutter stability is not as good as other schemes.
Application of tangent modulus method in nonlinear settlement calculation of foundation
Authors: Zhang Yu-cheng , Hu Hai-ying , Chen Cai-yuan
Published: July 2020

Foundation settlement calculation has been a difficult and hot problem in geotechnical engineering study. The problems lies in the large differences between the geotechnical parameters of field and indoor test. The using of the tangent modulus method based on the field loading test to determine the calculation parameters can overcome this shortcoming, and reflect the non-linear of foundation settlement, which is a new progress of foundation settlement calculation. However, compared with other tests, the in situ plate loading test has higher difficulty, and it is also difficult to reflect the characteristics of deep soil. In this paper, by making use of systematic geotechnical test data by Riverside Campus, Texas A & M University, United States, it first examines the feasibility of the tangent modulus method used in sand foundation nonlinear settlement calculation, and then studies on the tangent modulus calculation methods of adopting lateral pressure test, The CTP test and other field tests to determine the different soil layers and lastly tests the results of loading tests for different plate sizes. The results show that the calculated parameters needed in the tangent modulus method determined by the lateral pressure test, The CTP test and other field tests are feasible. In addition, when the parameters thus determined are used in the tangent modulus method to calculate the load experimental curves of different plate sizes, the calculated nonlinear curve has good consistency with and experimental curves.
Analysis of influence of aggregate stiffness on coarse aggregate movement of asphalt mixture
Authors: Liu W D , Gong X , Xiong J P , Zhou S B
Published: July 2020

The movement law of aggregate is more complicated in the static pressure process of asphalt mixture. In order to analyze the evolution law of the aggregate, the objective of this paper is to develop 3D (3-dimensional) mixture compaction models. The coordination number, void ratio, average contact force, and axial stress are used as indicators to investigate the effects of aggregate stiffness on the law of aggregate movement. The influence of material parameters on aggregate movement was explored from the microscopic level so as to provide suggestions for the design of graded.
Analysis of the Differences between Chinese and Japanese Traditional Wooden Architecture
Authors: Zhou H J , Huang J
Published: July 2020

Buddhism has been the link between China and Japan for more than 1,500 years in terms of architectural technology. With the introduction of Buddhism, Japan has been absorbing and transforming traditional Chinese wooden construction technology into a part of its own culture. The history of Japanese architecture is mostly the process of ingesting and assimilating Chinese architectural culture. The study of Chinese and Japanese wooden architecture is an important supplement to the history of east Asian architecture. This paper starts from the origin of Chinese and Japanese traditional wooden architecture, compares the differences between Chinese and Japanese traditional wooden architecture technology, and analyses the reasons for the differences between Chinese and Japanese traditional wooden architecture from the perspective of natural environment and construction technology.
Researches in Application of Stockade Box Structure in Ancient Dams
Authors: Zhang Handong , Yao Jianfeng , Wang Yijia , Jiang Zhanchao
Published: July 2020

With advantages of stability and long service life, stockade box structure had made significant contributions to water conservancy in ancient times, by reducing the damage caused by flood. This paper focuses on the structure’s working principle, effects, mechanical property, etc., and provides improvement suggestions by applying modern scientific and technological approaches, in order to provide reference from the knowledge and design of the ancients in modern water conservancy projects.
Application on credit evaluation and supervision of highway construction enterprise in China
Authors: Zhao Xin-hui , Chu Chun-chao , Gao Ai-ying
Published: July 2020

The credit evaluation of highway construction enterprise is the core of highway construction market credit system, and an important part of building the new credit-based highway construction market supervision mechanism. Because of not only some problems in the current credit evaluation of highway construction enterprise, but also the latest national policy requirement and the actual need of highway construction market, some new improvements were put forward in the thesis. Firstly the new credit evaluation framework system of evaluation of highway construction enterprise was introduced, and then the credit evaluation contents and standards were reined, then the credit evaluation procedure and method were improved in the next part. Finally we put forward the credit classification and supervision measures. An example was showed that the new credit evaluation system was applied on the highway construction enterprise in X province. The results have an important decision-making reference value and practical significance on strengthening the credit evaluation and management of highway construction market, and that will further standardize and create an honest trustworthy market environment, and advance the modernization of highway construction market governance system and governance capacity.
Shear Behavior of Prefabricated Segmental Epoxied Joints Considering Defect Degree in Cemented Surfaces
Authors: Hao Chen , Kai Zhou
Published: July 2020

In order to research the influence of the defect degree of cemented surface on the shear behaviour of prefabricated segmental epoxied joints, the paper considers the defect degree of cemented surfaces on the specimens of epoxied joints with single keys by direct shear test and records the ultimate shear loads and vertical relative slips, the failure modes of the specimens and the normalized shear stress-vertical relative slip curve are analysed, and the measured values of the ultimate shear loads are compared with the existing calculation formula. It can be concluded that the shear capacity, normalized shear stress and plastic deformation capacity of the specimens of epoxied joints with single keys without defect in the cemented surfaces have been improved which are compared with the specimens with 10% defects and the specimens with 20% defects. The BUYUKOZTURK O formula overestimates the shear capacity of the specimens with 10% defects, and underestimates the shear capacity of the specimens with no defects and10% defects; The formulas of Sun Xueshuai and Yuan Aimin underestimate the shear capacity of the specimens with no defects, 10% defects and 20% defects. It is not appropriate to ignore the effect of the defect degree in the cemented surface on the shear capacity of the epoxied joints.
Study of Simplified Calculating Model on Friction Correlated Prestress Loss for PC Bridges
Authors: Shi Huibin , Guo Qi
Published: July 2020

The friction correlated loss for prestress takes up a comparative large proportion in the total prestress loss, which is hard to control and brings unsafe factor to the Prestressed Concrete (PC) bridges. For better quantification, a simplified calculating model for friction correlated prestress loss was put forward in a universal way based on comparatively sophisticated prestressing loss method in current code. The determinant simplified coefficients may also provide some references in calculating the friction relevant losses for prestress of the space curve tendon in other PC bridges.
Study on factors influencing the performance of reactive powder concrete
Authors: Yan Xikang , Wen Jiapeng
Published: July 2020

Reactive powder concrete (RPC) is a new type of ultra-high performance concrete(UHPC). There are many related factors that affect the mechanical properties of RPC. This paper researches on the effect of curing temperature and steel fiber type on the material strength. The research results show that within a certain range, the strength of RPC increases with the increase of curing temperature, and the maximum strength can be obtained when the curing temperature is 90°C. In the actual project, the best curing temperature is 75 °C. And the study has shown that blending fine steel fibers can optimize its mechanical properties.
Research on static performance of T-shaped stiffener Reinforced Box Space joints under Spatial Loading
Authors: Jin L , Zhao S Q
Published: July 2020

The problem of inner partition reinforced box column are the weld quality, time-consuming and laborious. In view of the problem, T-shaped stiffener externally reinforced box space beam-column joinst are proposed in this paper. The finite element simulation was used to study the evolution of the initial stiffness of the T-shaped stiffener reinforced joints under spatial static loading, and the mechanism of the mutual force transfer between the T-shaped stiffener and the H-shaped beam and square column are revealed. The beam section height, the width of the T-shaped stiffener web, the height of the T-shaped stiffener flange are analyzed which are the T-shaped stiffener geometric parameters. The static performance of the reinforced box space joints are gained. The results show that the plastic hinge of the T-shaped stiffener reinforced the space joint is formed in the distance from the beam flange which is the point connecting with the end of the T-shaped stiffener. Such as the stress distribution is reasonable. The bearing capacity, plastic limit bending moment and initial stiffness of the box space joint can be effectively improved with increasing of the beam section height, stiffener web width and stiffener flange height. Therefore, the external T-shaped stiffener reinforced square steel column H-beam space joint has good static performance.
Research on the Construction Mode of European Low-Carbon Buildings
Authors: Wang Chuan , Zhang Hui , Liu Sufang
Published: July 2020

In the background of global warming, developing low-carbon economy and low-carbon buildings is the development direction and social goals of revitalizing the economy and saving energy in Europe. This paper introduces the present status of the development of low-carbon buildings in Europe, summarizes the construction practice of low-carbon buildings, and explores the development model of low-carbon buildings in Europe.
Optimization study on super-high arch dam temperature control standard and measure
Authors: Youzhi Liu , Jintao Li , Wenfu Chen , Guoxin Zhang , Yaosheng Tan
Published: July 2020

Currently, for several super-high arch dams under construction which have caused a series of issues after being strict with temperature control standards, this paper has a sensitivity analysis through a variety of programs and a systematic study about the impact which the highest temperature, the cooling height, the same cooling zone height and other key factors have on the temperature stress of the construction period dam, and then proposes that the temperature control standard and the selection of measures of the ultra-high arch dam are relatively stricter than the regulatory requirements of the traditional dam as long as we have a reasonable control about the temperature drop on the time domain and the temperature gradient on the spatial domain. However we need not make all the dams as a constraint zone to have a temperature stress control. After separated from the basis constraints zone, the maximum temperature of the dam can increase 3-4 °C at least. In addition, while the dam’s same cooling zone height is controlled by the 0.2L (L for the bottom width), it can meet the requirements for filling and anti-cracking without using two cooling areas. This finding will help reduce the difficulty of height control of the cantilever when the dam is under construction.
Tectonic Methodology on the Façade Composition Pattern of Prefabricated Building Enclosure Wallboards
Authors: Wang Chao , Li Fanrong , Zhang Jingyi , Guo Jinzhe , Li Shengcai
Published: July 2020

Building industrialization have been becoming mainstream in China. But the challenge to balance the diversity and standardization on the form of prefabricated building seems to be hardly overcame. The methodology for facade design related to prefabricated buildings is discussed in this paper. Enclosure walls were divided into a few modular panels based on the distance between columns, floor height, windowsill’s heights, and so on. Then, the panels were assigned different function according to their position on the building elevation. Some of the panels were combined with solar photovoltaic cell, some were designed into polyhedral wall panels with cavity embedded building service equipment and pipelines. The panels were assembled in terms of aesthetic principles and their roles. Possible composition pattern has been probed and corresponding suggestion have been offered. Nantong Dongsheng international business centre has been taken as an example to verify the operability of the methodology on the facade composition pattern in design process.
Research on Construction Control of Semi Hybrid Steel-concrete Comoposite Cable-stayed Bridge
Authors: Qi Tiedong , Yuan Qin , Ma Lei , Liu Dianyuan , Wang Xiaolei
Published: July 2020

Hong-shui river especially big bridge is a kind of semi hybrid steel-concrete comoposite cable-stayed bridge. The erection of Guizhou side span adopt the incremental launching construction method, which was composite beam; The erection of midspan adopt cable-stayed buckled method, which was composite beam; The erection of Guangxi side span adopt support frame casting in situ construction method, which was concrete π type girder. The paper focus on the characteristics of the asymmetrical structure forma and asymmetric construction method of Hong-shui river especially big bridge, discussing the key contents of construction monitoring, which can offer reference and consulting for related engineering.
Smoke movement analysis in an inner corridor building with vents on the stairwell
Authors: Zhang Xiaotao , Du Lingling , Zhang Yue , Pei Guihong
Published: July 2020

One inner corridor building was constructed by computational fluid dynamics (CFD) software and a series of CFD simulations were conducted in the building with/without a vent on the stairwell for different negative pressure differences induced by the surrounding wind. The result shows that the area affected by smoke is significantly decreased when the vent is set on the stairwell and the height of neutral plane increases significantly. However, it will increase the spread trend of smoke in low floors. The surrounding wind will produce negative pressure differences at the vent. For the high floors, with the increasing of negative pressure difference, the area affected by smoke is further reduced, but the degree of reduction is not obvious. For the low floors, the trend of smoke spread has not been alleviated with the increasing of negative pressure difference.
Research on the Current Situation and Countermeasures of English Teaching in Vocational Colleges in the Era of Big Data
Authors: Ruolan Li , Guangyong Liu
Published: July 2020

This paper discusses the characteristics of big data and status of it in the field of English teaching, expounds the problems existing in current English teaching in vocational education, and analyses the ways to realize the optimal allocation of teaching resources, the transformation of teachers’ functions and roles, the development of individualized students and the teaching environment on the basis of big data. It aims to integrate classroom teaching with practical situations, truly transform students’ knowledge into practical English application skills and better serve their major.
ampir: an R package for fast genome-wide prediction of antimicrobial peptides
Authors: Fingerhut Legana C H W , Miller David J , Strugnell Jan M , Daly Norelle L , Cooke Ira R
Published: July 2020

Antimicrobial peptides (AMPs) are the key components of the innate immune system that protect against pathogens, regulate the microbiome and are promising targets for pharmaceutical research. Computational tools based on machine learning have the potential to aid discovery of genes encoding novel AMPs but existing approaches are not designed for genome-wide scans. To facilitate such genome-wide discovery of AMPs we developed a fast and accurate AMP classification framework, ampir. ampir is designed for high throughput, integrates well with existing bioinformatics pipelines, and has much higher classification accuracy than existing methods when applied to whole genome data.

Availability and implementation

ampir is implemented primarily in R with core feature calculation methods written in C++. Release versions are available via CRAN and work on all major operating systems. The development version is maintained at https://github.com/legana/ampir.

Supplementary information

Supplementary data are available at Bioinformatics online.
Characterization of parameters with a mixed bias property
Authors: Rotnitzky A , Smucler E , Robins J M
Published: July 2020

We study a class of parameters with the so-called mixed bias property. For parameters with this property, the bias of the semiparametric efficient one-step estimator is equal to the mean of the product of the estimation errors of two nuisance functions. In nonparametric models, parameters with the mixed bias property admit so-called rate doubly robust estimators, i.e., estimators that are consistent and asymptotically normal when one succeeds in estimating both nuisance functions at sufficiently fast rates, with the possibility of trading off slower rates of convergence for the estimator of one of the nuisance functions against faster rates for the estimator of the other nuisance function. We show that the class of parameters with the mixed bias property strictly includes two recently studied classes of parameters which, in turn, include many parameters of interest in causal inference. We characterize the form of parameters with the mixed bias property and of their influence functions. Furthermore, we derive two functional loss functions, each being minimized at one of the two nuisance functions. These loss functions can be used to derive loss-based penalized estimators of the nuisance functions.
Phylogeographical and cytogeographical history ofArtemisia herba-alba(Asteraceae) in the Iberian Peninsula and North Africa: mirrored intricate patterns on both sides of the Mediterranean Sea
Authors: Bougoutaia Youcef , Garnatje Teresa , Vallès Joan , Kaid-Harche Meriem , Ouhammou Ahmed , Dahia Mostefa , Tlili Abderrazak , Vitales Daniel
Published: July 2020

Artemisia herba-alba is an important component of Mediterranean dry steppe floras, being widely distributed in arid areas of the Iberian Peninsula and North-West Africa. In this study, we use genetic, cytogenetic and niche modelling tools to investigate the natural history of the species, focusing particularly on the role played by polyploidization to explain current diversity patterns throughout the main distribution range of the plant. Our sequencing data indicate a complex phylogeographical structure showing similar haplotype diversity patterns on both sides of the Strait of Gibraltar and no clear signals of genetic refugia. According to our cytogeographical results, we inferred multiple polyploidization events, which probably took place on the Iberian Peninsula and in North Africa independently. Environmental niche modelling suggested stable potential distributions of A. herba-alba on both sides of the Mediterranean Sea under present and past Last Glacial Maximum conditions, which could be related to the intricate spatial genetic and cytogenetic patterns shown by the species. Finally, environmental modelling comparison among cytotypes revealed that the niche of tetraploids is narrower and nested in that of diploids, a result that could indicate environmental specialization and could potentially explain recurrent establishment success of tetraploids.
Autoimmune encephalitis mediated by B-cell response against N-methyl-d-aspartate receptor
Authors: Wagnon Isabelle , Hélie Pauline , Bardou Isabelle , Regnauld Caroline , Lesec Léonie , Leprince Jerôme , Naveau Mikaël , Delaunay Barbara , Toutirais Olivier , Lemauff Brigitte , Etard Olivier , Vivien Denis , Agin Véronique , Macrez Richard , Maubert Eric , Docagne Fabian
Published: July 2020

Anti-N-methyl-d-aspartate receptor (NMDAR) encephalitis is a neuropsychiatric disease characterized by an antibody-mediated autoimmune response against NMDAR. Recent studies have shown that anti-NMDAR antibodies are involved in the pathophysiology of the disease. However, the upstream immune and inflammatory processes responsible for this pathogenic response are still poorly understood. Here, we immunized mice against the region of NMDA receptor containing the N368/G369 amino acids, previously implicated in a pathogenic response. This paradigm induced encephalopathy characterized by blood–brain barrier opening, periventricular T2-MRI hyperintensities and IgG deposits into the brain parenchyma. Two weeks after immunization, mice developed clinical symptoms reminiscent of encephalitis: anxiety- and depressive-like behaviours, spatial memory impairment (without motor disorders) and increased sensitivity to seizures. This response occurred independently of overt T-cell recruitment. However, it was associated with B220+ (B cell) infiltration towards the ventricles, where they differentiated into CD138+ cells (plasmocytes). Interestingly, these B cells originated from peripheral lymphoid organs (spleen and cervical lymphoid nodes). Finally, blocking the B-cell response using a depleting cocktail of antibodies reduced the severity of symptoms in encephalitis mice. This study demonstrates that the B-cell response can lead to an autoimmune reaction against NMDAR that drives encephalitis-like behavioural impairments. It also provides a relevant platform for dissecting encephalitogenic mechanisms in an animal model, and enables the testing of therapeutic strategies targeting the immune system in anti-NMDAR encephalitis.