bluuebunny/crossref_metadata_2025 huggingface dataset:
Fundus first as the standard technique for laparoscopic cholecystectomy
Authors: Cengiz Yucel , Lund Meisam , Jänes Arthur , Lundell Lars , Sandblom Gabriel , Israelsson Leif
Published: December 2019

In previous studies the fundus first technique (FF) has been a cost-effective way to simplify the laparoscopic cholecystectomy (LC) and facilitate patient rehabilitation. The feasibility and safety profile when introducing FF as the standard technique were aimed in this study. Between 2004–2014, 29 surgeons performed 1425 LC with FF and 320 with a conventional technique. During the first year 56% were with FF and 98% during the last four years. More females, ultrasonic shears, urgent operations, daycare operations and a shorter operation time were found with FF. 63 (3.6%) complications occurred: 10 (0.6%) bleedings, 33 (1.9%) infections and 12 (0.7%) bile leakages. Leakage from cystic duct occurred in 4/112 (3.6%) when closed with ultrasonic shears and in 4/1633 (0.2%) with clips (p 0.008). A common bile duct lesion occurred in 1/1425 (0.07%) with FF and in 3/320 (0.9%) with the conventional approach (p 0.003). In a multivariate regression model, the conventional technique was a risk factor for bile duct injury with an odds ratio of 20.8 (95% CI 1.6–259.2). In conclusion FF was effectively established as the standard procedure and associated with lower rates of bile duct injuries. Clipless closure of the cystic duct increased the rate of leakage.
Author Correction: Antioxidative, anti-inflammatory and anti-apoptotic effects of ellagic acid in liver and brain of rats treated by D-galactose
Authors: Chen Peng , Chen Fuchao , Zhou Benhong
Published: December 2019

An amendment to this paper has been published and can be accessed via a link at the top of the paper.
Author Correction: Human–machine partnership with artificial intelligence for chest radiograph diagnosis
Authors: Patel Bhavik N. , Rosenberg Louis , Willcox Gregg , Baltaxe David , Lyons Mimi , Irvin Jeremy , Rajpurkar Pranav , Amrhein Timothy , Gupta Rajan , Halabi Safwan , Langlotz Curtis , Lo Edward , Mammarappallil Joseph , Mariano A. J. , Riley Geoffrey , Seekins Jayne , Shen Luyao , Zucker Evan , Lungren Matthew P.
Published: December 2019

An amendment to this paper has been published and can be accessed via a link at the top of the paper.
Searching for dark photon dark matter in LIGO O1 data
Authors: Guo Huai-Ke , Riles Keith , Yang Feng-Wei , Zhao Yue
Published: December 2019

Dark matter exists in our Universe, but its nature remains mysterious. The remarkable sensitivity of the Laser Interferometer Gravitational-Wave Observatory (LIGO) may be able to solve this mystery. A good dark matter candidate is the ultralight dark photon. Because of its interaction with ordinary matter, it induces displacements on LIGO mirrors that can lead to an observable signal. In a study that bridges gravitational wave science and particle physics, we perform a direct dark matter search using data from LIGO’s first (O1) data run, as opposed to an indirect search for dark matter via its production of gravitational waves. We demonstrate an achieved sensitivity on squared coupling as $$\sim\! 4\times 1{0}^{-45}$$~4×10−45, in a $$U{(1)}_{{\rm{B}}}$$U(1)B dark photon dark matter mass band around $${m}_{{\rm{A}}} \sim 4\,\times 1{0}^{-13}$$mA~4×10−13 eV. Substantially improved search sensitivity is expected during the coming years of continued data taking by LIGO and other gravitational wave detectors in a growing global network.
Nanomolar detection of biothiols via turn-ON fluorescent indicator displacement
Authors: Praveen Kumar P. P. , Kaur Navneet , Shanavas Asifkhan , Neelakandan Prakash P.
Published: December 2019

A simple, visual colour and turn-ON fluorescent method for the detection of biothiols under physiological conditions is reported. The chemosensing is achieved on the basis of the displacement of BODIPY dyes from the surface of gold nanoparticles.
A fluorescence assay for microRNA let-7a by a double-stranded DNA modified gold nanoparticle nanoprobe combined with graphene oxide
Authors: Gao Yuanyuan , Tian Jingjing , Zhang Xing , Qiao Bin , Cao Yang , Wang Xiaohong , Wu Qiang
Published: December 2019

A fluorescence switching platform was developed to monitor target microRNA let-7a by coupling dsDNA–AuNPs with the GO nanosheet.
An electron-rich small AIEgen as a solid platform for the selective and ultrasensitive on-site visual detection of TNT in the solid, solution and vapor states
Authors: Prusti Banchhanidhi , Chakravarty Manab
Published: December 2019

A simple trimethoxybenzene-linked anthracenyl π-conjugate is developed for the ultra-sensitive and selective detection of TNT in solid, liquid and vapor phases. The TNT could also be detected in the field soil.
Recent advances in phosphine catalysis involving γ-substituted allenoates
Authors: Li Er-Qing , Huang You
Published: December 2019

This feature article will describe the selected examples of organophosphine catalysis of γ-substituent allenoates with a wide range of electrophiles to give diverse annulations.
Unprecedented toughening high-performance polyhexahydrotriazines constructed by incorporating point–face cation–π interactions in covalently crosslinked networks and the visual detection of tensile strength
Authors: Guan Xiaofang , Ma Yuanchi , Yang Li , Xu Yewei , Lan Yang , Huang Ying , Philas Diangha Tasah , Chang Guanjun
Published: December 2019

We described a new concept for the design of high-performance supramolecular thermosets by incorporating point–face cation–π interactions in covalently crosslinked networks.
Hydrazone chemistry assisted DNAzyme for the analysis of double targets
Authors: Sheng Anzhi , Su Lihong , Jalalah Mohammed , Al-Assiri M. S. , Harraz Farid A. , Zhang Juan
Published: December 2019

In this work, a hydrazone chemistry assisted DNAzyme has been designed and constructed. With superior catalyzed capability, hydrazone chemistry assisted DNAzyme has been successfully applied for analysis of double targets.
First-principles study on the mechanism of photocatalytic reduction of nitrobenzene on the rutile TiO2(110) surface
Authors: Ji Yongfei , Fan Ting , Luo Yi
Published: December 2019

Oxygen vacancies and excess electrons play vital roles in the photocatalytic reduction of nitrobenzene on the TiO2 surface.
Deciphering the response of asymmetry in the hydrophobic chains of novel cationic lipids towards biological function
Authors: Mukherjee Dipanjan , Singh Priya , Rakshit Tatini , Puthiya-Purayil Theja P. , Vemula Praveen Kumar , Sengupta Jhimli , Das Ranjan , Pal Samir Kumar
Published: December 2019

Variations in molecular architecture of the hydrophobic tails of cationic lipids influence cationic liposome*s efficiency of delivering nucleic acids during cell transfection.
Enhanced thermopower in covalent graphite–molecule contacts
Authors: Droghetti Andrea , Rungger Ivan
Published: December 2019

The conversion of heat into electricity is determined by the thermopower. We show that the thermopower of junctions with molecules bonded to graphite can be very large and we then suggest new platforms for molecular-scale thermoelectric devices.
On the stability of hydroxyl groups on substituted titania
Authors: Sai Phani Kumar V. , Deshpande Parag A.
Published: December 2019

The present study reports the stability of hydroxyl groups involving the surface coordinated oxygens of Pd,C,N-doped, and Pd/C and Pd/N-codoped anatase TiO2, probed using DFT calculations.
Hyperfine structure of the NaCs b3Π2 state near the dissociation limit 3S1/2 + 6P3/2 observed with ultracold atomic photoassociation
Authors: Wang Xiaofeng , Liu Wenliang , Li Yuqing , Wu Jizhou , Sovkov Vladimir B. , Ma Jie , Onishchenko Sofiia , Li Peng , Fu Yongming , Li Dan , Fan Qunchao , Xiao Liantuan , Jia Suotang
Published: December 2019

The hyperfine structure of the ultracold NaCs molecular b3Π2 state is studied experimentally and theoretically.
How coverage influences thermodynamic and kinetic isotope effects for H2/D2 dissociative adsorption on transition metals
Authors: Chen Benjamin W. J. , Mavrikakis Manos
Published: December 2019

Hydrogen isotope effects are influenced by adsorbate coverage: at high coverages, isotope effects are lower than at low coverages. This helps to rationalize observed isotope effects, allowing more precise elucidation of reaction mechanisms.
A HCBP1 peptide conjugated ruthenium complex for targeted therapy of hepatoma
Authors: Wang Yi , Qin Weirong , Shi Hongdong , Chen Haijie , Chai Xiaoyan , Liu Jingang , Zhang Pingyu , Li Zigang , Zhang Qianling
Published: December 2019

An HCBP1 peptide–ruthenium conjugate (Ru–β-Ala-FQHPSFI) as a potential candidate for targeted therapy of hepatoma was synthesized.
Organometallic ciprofloxacin conjugates with dual action: synthesis, characterization, and antimicrobial and cytotoxicity studies
Authors: Szczupak Łukasz , Kowalczyk Aleksandra , Trzybiński Damian , Woźniak Krzysztof , Mendoza Gracia , Arruebo Manuel , Steverding Dietmar , Stączek Paweł , Kowalski Konrad
Published: December 2019

Organometallic ciprofloxacin conjugates were synthesized and two mechanisms of antimicrobial activity were demonstrated. The first mechanism involves the inhibition of type IIA topoisomerases and the second involves ROS generation in bacterial cells.
UV-visible spectral analysis for the characterization of the titanium(iv)–4-(2-pyridylazo)resorcinol complex as a reagent for determining hydrogen peroxide
Authors: Takamura Kiyoko , Matsumoto Takatoshi
Published: December 2019

Titanium(iv)–4-(2-pyridylazo)resorcinol (Ti–PAR) has been effectively used for the determination of hydrogen peroxide.
dz2 orbital character of polyhedra in complex solid-state transition-metal compounds
Authors: Ohkubo Isao , Mori Takao
Published: December 2019

dz2 orbitals of the transition metals make major contributions to electronic structures near the Fermi levels in d0-, d1-complex transition-metal compounds containing face-sharing, edge-sharing octahedra, or edge-sharing trigonal prismatic layers.
Solvent effect on xylose conversion under catalyst-free conditions: insights from molecular dynamics simulation and experiments
Authors: Lin Qixuan , Liao Shouwei , Li Libo , Li Weiying , Yue Fengxia , Peng Feng , Ren Junli
Published: December 2019

In this study, experiments and molecular dynamics simulations were combined to get insights into the role of solvent during the process of xylose conversion under catalyst-free conditions.
Continuous photochemical benzylic bromination using in situ generated Br2: process intensification towards optimal PMI and throughput
Authors: Steiner Alexander , Williams Jason D. , de Frutos Oscar , Rincón Juan A. , Mateos Carlos , Kappe C. Oliver
Published: December 2019

Using a Br2 generator in flow process intensified conditions has been developed for photochemical benzylic bromination on a kg scale.
Functionalization of commercial pigment Hostasol Red GG for incorporation into organic thin-film transistors
Authors: Melville Owen A. , Grant Trevor M. , Rice Nicole A. , Wang Bowen , Josse Pierre , Lessard Benoît H.
Published: December 2019

We explored the functionalization of the inexpensive commercial dye Red GG through a simple one-pot Grignard reaction leading to novel substituted derivatives that were incorporated into organic thin film transistors.
Azilsartan piperazine salt solvate and monohydrate: preparation, crystal structure, enhanced solubility and oral bioavailability
Authors: Xu Juan , Du Rongkai , Wu Lvying , Zhang Xianrui , Guan Su , Zhang Lei , Ning Lifeng , Li Shan
Published: December 2019

Two azilsartan–piperazine salt solvates and a monohydrate feature crystal structural diversity and improve the azilsartan solubility over that of the free Az form. Az–Pz·EtOH and Az–Pz·H2O improve the plasma azilsartan concentration Cmax and AUC over the free Az form.
Defect creation in WSe2 with a microsecond photoluminescence lifetime by focused ion beam irradiation
Authors: Qian Qingkai , Peng Lintao , Perea-Lopez Nestor , Fujisawa Kazunori , Zhang Kunyan , Zhang Xiaotian , Choudhury Tanushree H. , Redwing Joan M. , Terrones Mauricio , Ma Xuedan , Huang Shengxi
Published: December 2019

Atomic defects with a four microsecond-long photoluminescence lifetime are created in single-layer WSe2 by focused ion beam irradiation.
Exploring the antifouling effect of elastic deformation by DEM–CFD coupling simulation
Authors: Tian Limei , Jin E. , wang Jianfu , Wang Xiaoming , Bing Wei , Jin Huichao , Zhao Jie , Ren Luquan
Published: December 2019

The bacterial adhesive kinetics with different morphology on elastic surface and rigid surface was studied by DEM–CFD coupling simulation.
Strong adhesion of poly(vinyl alcohol)–glycerol hydrogels onto metal substrates for marine antifouling applications
Authors: Zhu Heng-Wei , Zhang Jia-Nan , Su Pei , Liu Tianqi , He Changcheng , Feng Danqing , Wang Huiliang
Published: December 2019

PVA–glycerol gels, which were adhered onto metal substrates by using adhesives, were employed as robust antifouling coating materials. The adhesion stability and antifouling performances of the hydrogel coating against barnacles were investigated.
Active binary mixtures of fast and slow hard spheres
Authors: Kolb Thomas , Klotsa Daphne
Published: December 2019

Monodisperse active and active/passive systems are subsets of a larger continuum of active/active mixtures. We find that an average of each species' activity weighted by its amount provides a quantity which tunes the dynamic and steady-state behaviors of active mixtures.
Efficient UV-vis-IR photothermocatalytic selective ethanol oxidation on MnOx/TiO2 nanocomposites significantly enhanced by a novel photoactivation
Authors: Yang Yi , Wu Shaowen , Li Yuanzhi , Zhang Qian , Zhao Xiujian
Published: December 2019

MnOx/TiO2 nanocomposites exhibit good catalytic activity and excellent durability for photothermocatalytic selective ethanol oxidation under UV-vis-IR and IR irradiation. A novel photoactivation is found to significantly enhance catalytic activity due to activation energy being reduced upon irradiation.
Synergistic effect of a “stellate” mesoporous SiO2@Au nanoprobe and coffee-ring-free hydrophilic–hydrophobic substrate assembly in an ultrasensitive SERS-based immunoassay for a tumor marker
Authors: Yang Zhiyuan , Liu Hongmei , Tian Yiran , Chen Ying , Niu Zhiqiang , Zhou Canliang , Wang Fuyan , Gu Chenjie , Tang Shiwei , Jiang Tao , Zhou Jun
Published: December 2019

Ultrasensitive SERS-based immunoassay induced by SiO2@Au nanoprobe and hydrophilic–hydrophobic assembly substrate.
A lysosome independent role for TFEB in activating DNA repair and inhibiting apoptosis in breast cancer cells
Authors: Slade Logan , Biswas Dipsikha , Ihionu Francis , El Hiani Yassine , Kienesberger Petra C. , Pulinilkunnil Thomas
Published: December 2019

Transcription factor EB (TFEB) is a master regulator of lysosomal biogenesis and autophagy with critical roles in several cancers. Lysosomal autophagy promotes cancer survival through the degradation of toxic molecules and the maintenance of adequate nutrient supply. Doxorubicin (DOX) is the standard of care treatment for triple-negative breast cancer (TNBC); however, chemoresistance at lower doses and toxicity at higher doses limit its usefulness. By targeting pathways of survival, DOX can become an effective antitumor agent. In this study, we examined the role of TFEB in TNBC and its relationship with autophagy and DNA damage induced by DOX. In TNBC cells, TFEB was hypo-phosphorylated and localized to the nucleus upon DOX treatment. TFEB knockdown decreased the viability of TNBC cells while increasing caspase-3 dependent apoptosis. Additionally, inhibition of the TFEB-phosphatase calcineurin sensitized cells to DOX-induced apoptosis in a TFEB dependent fashion. Regulation of apoptosis by TFEB was not a consequence of altered lysosomal function, as TFEB continued to protect against apoptosis in the presence of lysosomal inhibitors. RNA-Seq analysis of MDA-MB-231 cells with TFEB silencing identified a down-regulation in cell cycle and homologous recombination genes while interferon-γ and death receptor signaling genes were up-regulated. In consequence, TFEB knockdown disrupted DNA repair following DOX, as evidenced by persistent γH2A.X detection. Together, these findings describe in TNBC a novel lysosomal independent function for TFEB in responding to DNA damage.
AntLP: ant‐based label propagation algorithm for community detection in social networks
Authors: Hosseini Razieh , Rezvanian Alireza
Published: December 2019

In social network analysis, community detection is one of the significant tasks to study the structure and characteristics of the networks. In recent years, several intelligent and meta‐heuristic algorithms have been presented for community detection in complex social networks, among them label propagation algorithm (LPA) is one of the fastest algorithms for discovering community structures. However, due to the randomness of the LPA, its performance is not suitable for the general purpose of network analysis. In this study, the authors propose an improved version of the label propagation (called AntLP) algorithm using similarity indices and ant colony optimisation (ACO). The AntLP consists of two steps: in the first step, the algorithm assigns weights for edges of the input network using several similarity indices, and in the second step, the AntLP using ACO tries to propagate labels and optimise modularity measure by grouping similar vertices in each community based on the local similarities among the vertices of the network. In order to study the performance of the AntLP, several experiments are conducted on some well‐known social network datasets. Experimental simulations demonstrated that the AntLP is better than some community detection algorithms for social networks in terms of modularity, normalised mutual information and running time.
Tracing shock type with chemical diagnostics
Authors: James T. A. , Viti S. , Holdship J. , Jiménez-Serra I.
Published: December 2019

Aims.The physical structure of a shock wave may take a form unique to its shock type, implying that the chemistry of each shock type is unique as well. We aim to investigate the different chemistries of J-type and C-type shocks in order to identify unique molecular tracers of both shock types. We apply these diagnostics to the protostellar outflow L1157 to establish whether the B2 clump could host shocks exhibiting type-specific behaviour. Of particular interest is the L1157-B2 clump, which has been shown to exhibit bright emission in S-bearing species and HNCO.

Methods.We simulate, using a parameterised approach, a planar, steady-state J-type shock wave using UCLCHEM. We compute a grid of models using both C-type and J-type shock models to determine the chemical abundance of shock-tracing species as a function of distance through the shock and apply it to the L1157 outflow. We focus on known shock-tracing molecules such as H2O, HCN, and CH3OH.

Results.We find that a range of molecules including H2O and HCN have unique behaviour specific to a J-type shock, but that such differences in behaviour are only evident at lowvsand lownH. We find that CH3OH is enhanced by shocks and is a reliable probe of the pre-shock gas density. However, we find no difference between its gas-phase abundance in C-type and J-type shocks. Finally, from our application to L1157, we find that the fractional abundances within the B2 region are consistent with both C-type and J-type shock emission.
Identification and quantification of farmed red sea bream escapees from a large aquaculture area in Japan using microsatellite DNA markers
Authors: Sawayama Eitaro , Nakao Hironori , Kobayashi Wataru , Minami Takashi , Takagi Motohiro
Published: December 2019

A large number of farmed red sea bream (Pagrus major) and their gametes have escaped and dispersed into the wild from net-cage aquaculture since the advent of the technology in the mid-20th century. These escapees have likely been recruited into wild populations, affecting their genetic diversity. In this study, we used assignment methods with microsatellite markers to assess the frequency of escapee farmed red sea bream within the wild populations in a major aquaculture production region (UWJ) and in two regions with relatively lower production (IWG and SIJ) in Ehime Prefecture, Japan. The frequency of escapees in UWJ ranged from 14.1% to 30.2%, as shown by three methods of assignment. Escapees were frequently identified among specimens caught by angling (ranging from 26.7% to 46.7%), suggesting that they stay in the same area even after escape or are less cautious than wild individuals. No escapee was found in IWG and SIJ, areas with less extensive aquaculture. Some wild-caught fish appeared to have hybridized with farmed fish, as indicated by the threshold of membership coefficients obtained by simulation. These results clearly indicate that large numbers of farmed individuals have escaped from UWJ, a major aquaculture area, since the inception of red sea bream farming in Japan. Genetic reshuffle has possibly occurred following hybridization of wild and farmed individuals.
Multiplicity-induced-dominancy in parametric second-order delay differential equations: Analysis and application in control design
Authors: Boussaada Islam , Niculescu Silviu-Iulian , El-Ati Ali , Pérez-Ramos Redamy , Trabelsi Karim
Published: December 2019

This work revisits recent results on maximal multiplicity induced-dominancy for spectral values in reduced-order time-delay systems and extends it to the general class of second-order retarded differential equations. A parametric multiplicity-induced-dominancy property is characterized, allowing to a delayed stabilizing design with reduced complexity. As a matter of fact, the approach is merely a delayed-output-feedback where the candidates’ delays and gains result from the manifold defining the maximal multiplicity of a real spectral value, then, the dominancy is shown using the argument principle. Sensitivity of the control design with respect to the parameters uncertainties/variation is discussed. Various reduced order examples illustrate the applicative perspectives of the approach.
Annealing effect of micro-alloying on the microstructure and properties of Cu-10Zn alloy
Authors: Chen Wei , Hu Jiarui , Xie Yi , Zhou Hengyi , Feng Chao , Bo Yu , Xiao Zhu
Published: December 2019

The effect of Fe and P (Ni and Si) on the microstructure and properties of Cu-10Zn alloys has been investigated using hardness test, electrical conductivity measurement, optical microscopy and transmission electron microscopy. γ-Fe precipitates formed during the aging process, but there is almost no effect of precipitation strengthening on the Cu-Zn-Fe-P alloy and sparsely Fe3P precipitates existed in the matrix. After homogenization treatment at 900°C for 2h, hot rolling by 80%, cold rolling by 80%, and ageing treatment at 400°C for 30min, Cu-Zn-Ni-Si alloy obtained good combinations of hardness (219.8HV) and electrical conductivity(28.2%IACS). Ni2Si precipitates formed during aging process and the crystal orientation relationship between matrix and precipitates is:(200)α || (100)δ, [100]α || [010]δ,. Compared with Cu-Zn-Fe-P, Cu-Zn-Ni-Si has finer grains, and the precipitation strengthening effect is more obvious.
Research on the Impact of Reducing Industrial and Commercial Electricity Price on Henan's Overall Price Level——Based on Social Accounting Matrix
Authors: Jin Yanming , Li Zhuonan , Zhang Mingyang
Published: December 2019

In order to reduce the operating costs of enterprises and optimize the business environment, China implemented the policy of reducing the general industrial and commercial electricity price by 10% in 2018 and 2019. This study uses the social accounting matrix to evaluate the effect of policy implementation on the price level of Henan Province. Through price transmission, we analyze the impact of industrial and commercial electricity price changes on production price and consumer price fluctuation of other sectors. The results show that the adjustment of general industrial and commercial electricity price has limited effect on the overall economic price level of Henan Province. The impact of electricity price adjustment on urban consumer price index is higher than that of rural consumer price index.
Discussion on Reinforcement Mechanism and Construction Technology of Pressurized Vacuum Preloading
Authors: Ai-jun ZHUGE
Published: December 2019

Based on the basic theory of vacuum preloading, this paper proposes an good effect of pressurized vacuum preloading in which the high pressure gas results in tiny cracks between the air pressurized pipe and band drain. Therefore additional drainage paths are introduced to improve the permeability of soil and accelerate soil consolidation. But field tests show that the advantages of pressurized vacuum preloading are not obvious compared with conventional vacuum preloading, and the soil settlement, soil properties and vane shear strength are slightly lower than those by conventional vacuum preloading. The vacuum pressure transmission is analysed in the air pressurized pipe and band drain as well as the dissipation of pore water pressure in the soil during the pressurization process, it is concluded that the unsatisfactory reinforcement effect is mainly due to the sealing problem between the top of the air pressurized pipe and the sand cushion, and the overlap problem between the booster pipe and band drain.
Performance Diagnosis and Energy-Saving Optimization of the Heat Recovery Unit in An Office Building in Sichuan
Authors: Xu Baowei , Li Nan , Li Xinghua
Published: December 2019

In recent years, the number and volume of public buildings have been increasing sharply, which has led to an increase in the working capacity of HVAC systems in public buildings. This paper analyzes and tests a heat recovery unit in an office building in Sichuan Province, China. The fresh air input temperature, the fresh air output temperature and the exhaust air temperature of the heat recovery unit in January in 2018 are analyzed. The positive and negative benefits are calculated, and thus the energy saved by the system during the test is obtained.
Collaborative design of prefabricated building architecture and structure based on PKPM-BIM platform
Authors: Yunlin Liu , Shaojie Zhang , Zijian Wang , Ziwen Qiu , Sheng He
Published: December 2019

Compared with traditional cast-in-place concrete buildings, prefabricated buildings have many advantages and meet the strategic requirements of national sustainable economic development, which has become the development direction of the construction industry. BIM (Building Information Modeling) simulates the real Information of buildings through digital Information, which has the characteristics of visualization, coordination, simulation, optimization, drawing availability and so on, and improves the efficiency of multi-professional collaborative design of prefabricated buildings. This paper mainly studies the advantages of collaborative design of prefabricated buildings based on PKPM-BIM platform for architecture and structure majors. Research shows that the application of BIM can improve the efficiency and quality of multi-professional collaborative design of prefabricated buildings.
ESV Measurement——The Opportunity Cost of Land Development
Authors: Yang Liuyi , Zhao Yanqi
Published: December 2019

Ecological systems are essential in maintaining a good living environment for human beings. However, human beings usually focus on the benefits they can gain from the ecosystem by developing the land and ignore the degradation of environment. In this paper, we will offer an ecological services evaluation model to measure the value of ecological services and provide land use planners with a method to compute the true economic costs of the land use development projects. First, we define ecological services value (ESV), which means the value of the benefits that ecosystem can provide. Then, we classify the functions of ecosystem into five kinds: water purification, climate regulation, air purification, biodiversity conservation and vegetation conservation. For each function, we choose a related index to measure the performance. After the classification, we adopt Analytical Hierarchy Process (AHP) to calculate the weight for each of the function and do the consistency test; second, we apply knowledge of economics to study the true economic costs; third, after getting the equation of the true economic costs, we realize it in the cost-benefit analysis. We offer two case studies to analyze the small community-sized project and large national project respectively; fourth, we take ten examples including U.S., Switzerland and China to apply our model in practice. We fit data and find the average level of land use percent over time, and form a model with differential equation in order to calculate the time-varying model of ESV; fifth, we focus on humanities field to explore the impacts on land use project planners and managers. They should not only be responsible for environmental degradation and monitor environmental index carefully, but also pay for the benefits which were ever owned by human beings before land development. In order to make our work more accurate and complete, we use SWOT Analysis across the analytical process. Finally, we promote our model and extend the factors from six to twelve, which increases the accuracy.
Beneficiation research on a low grade linnaeite ore with hema-tite-pyrite type
Authors: Zhang Xinfang , Wang Qinqin , Wang Chengdong , Zhu Lang , Shi Shujie , Wang Niao , Li Chunying , Shi Guiming
Published: December 2019

Mineralogy and separation experiments were carried out for a low-grade linnaeite ore (0.052%), which belonged to limonite-hematite-pyrite type complex mineral. Under the grinding fineness of 80% -0.074 mm, linnaeite concentrate which contained cobalt grade of 0.51%, recovery rate of 80.99%, sulfur grade of 23.79%, recovery of 88.03% was obtained by closed-circuit processes of one roughing, two scaenging and one cleaning, which used sulfate acid (4500 g/t) and copper sulfate (300 g/t) as activator, so-dium silicate (1000 g/t) and CMC (30 g/t) as inhibitor, ethyl xanthate（100 g/t）and butyl xanthate (100 g/t) as collector, 2# oil (40 g/t) as forther in roughing, no agent in cleaing and first scavenging, used ethyl xan-thate（50 g/t）and butyl xanthate (50 g/t) as collector, 2# oil (20 g/t) as forther in second scavenging.
Prediction and optimization of air velocity and gas concentration under control of air flow at outlet of fully mechanized heading
Authors: Gong Xiaoyan , Bian Tian , Zhang Xinyi , Xia Zhixin , Song Tao
Published: December 2019

Aiming at the problem that the traditional ventilation method can not control the wind speed and reduce the gas concentration, and cause the wind speed and gas concentration to exceed the limit, the new method of dynamic regulation of wind turbine outlet air flow to optimize the wind speed and gas concentration is studied. According to the actual problems, the influences of the air outlet parameters on wind speed and gas are simulated. The correlation mechanism between the air outlet and the wind speed and gas concentration and the regression prediction model are established. In the NingTiao Mine of Shaanxi Coal Group, the underground installation test and verification were carried out by using the self-developed control device, and the optimal wind field control plan for the Ningtiao Mine was determined. The results showed that the wind speed was too large or too small, and the parameters such as the diameter of the air outlet were adopted. The adjustment can control the wind speed to reach the 0.25m/s to 4m/s range required by the regulations, and the gas concentration is significantly reduced.
Research on Distributed Energy Operation Model of Distribution Network in China
Authors: Qiang Li , Yahong Xing , Zhihong Gu , ZhiWei Liu , HuiWen Qi , Zhuo Liu
Published: December 2019

With the development of China's social economy, the total demand for energy is increasing. Compared with traditional thermal power plants, natural gas distributed energy stations have many ad-vantages, which can realize the cascade utilization of energy, the efficiency of energy utilization can be im-proved. Using natural gas as fuel, SO2 and dust pollution can be eliminated, and improve the safety and reli-ability of power supply. However, the distributed energy station needs more capital investment during the project construction, but the distributed energy station has difficulty financing. Firstly, this paper introduces the environment of distributed energy policy in China, analyzes the current status of the China's natural gas distributed energy. Then, this paper summarizes the development of the Germany the energy industry pro-ject financing, and provides experience for the use of the financing methods of China's energy stations. Fi-nally, the model of China's natural gas energy construction is introduced from three aspects of investment, financing and engineering construction. The research results of this paper can provide experience for the project financing of the distributed energy station in China.
Ocean energy harvester based on piezoelectric VIV using different oscillators
Authors: Liu Min , Xia Hui , Liu Guoqiang , Xia Dong
Published: December 2019

A finite element fluid-solid coupling model for ocean energy harvester based on piezoelectric vortex-induced vibration(VIV) is established. Given that the Karman Vortex Street is generated after the fluid passes through the vibrator. The model includes the conversion of water flow energy to VIV energy and the capture of electrical energy by piezoelectric devices. And the output voltage curve is obtained by coupling with piezoelectric beam. Based on the fluid-solid coupling calculation, the dynamic response characteristics of the oscillator under different parameters such as shape of oscillators and fluid velocity are studied. The voltage output of piezoelectric beam in cylindrical, semi-cylindrical and regular triangular oscillators is analyzed. Simulation results show that the output voltage and pressure difference are largest in regular triangular oscillator system compared with the cylindrical and semi-cylindrical system. When changing fluid velocity, it is found that the higher the velocity of the water fluid be, the higher the output voltage be. When the given fluid velocity reaches 1 m/s, the maximum output voltage of cylindrical, semi-cylindrical and regular triangular piezoelectric energy harvesters reaches 0.045V, 0.08V, and 0.085V respectively. Under the same fluid velocity, change the ratio of height and width of oscillator, and find that the higher ratio of height and width of oscillator is more suitable to harvest the energy of VIV.
Research on the Design of Miniature Pile Foundation for Transmission Line
Authors: Yu Xinmin , Wang Xianri
Published: December 2019

Micro-pile is a kind of small diameter bored piles, also known as root pile, pile diameter is generally 150-400mm, length-diameter ratio is generally greater than 30,and pile length is usually not more than 30m. Compared with ordinary pile, micro-pile has the advantages of fast construction speed, small working surface, high bearing capacity and small settlement.
Experimental Study on Surface Protection of Concrete Panel in Reservoir Basin of Pumped Storage Power Station in Cold Region
Authors: Zhang Yi , Li Meng , Sun Zhiheng , Zhai Jie
Published: December 2019

Affected by various unfavorable factors during construction and operation,concrete panels of pumped storage power stationsin cold regions are prone to cracks, freeze-thaw erosion and other defects, which reduce the impermeabilityand durability of concrete panels. In order to effectively improve the impermeabilityand freezing resistancedurability of concrete panels, SK monocomponentpolyurea was selected for laboratory testsuch as tensile strength, freezing resistance, impermeabilityand xenon lamp weatheringaccording to the climatic conditions in northern cold regions and the operation characteristics of pumped storage power stations. Field protection tests were put into practiceon the reinforced concrete panels of the upper reservoir of Shisanling pumped storage power station, and 10 years of tracking tests were carried out. The experimental results show that SK monocomponent polyurea has good mechanical properties and long-term durability, which can play a positive role in improving the impermeabilityand anti-freezedurability of concrete panels. The protective effect is remarkable.
Experimental research on performance test after SCR denitration system ultra-low emission retrofit in a 600 MW coal-fired unit
Authors: Xu Xi
Published: December 2019

A systematic performance test was carried out for the ultra-low emission modification project of the Selective Catalytic Reduction (SCR) denitration system of a 600 MW coal-fired unit in a thermal power plant. Terms of the performance tests include denitration efficiency, ammonia escape rate, and SO2/SO3 conversion rate. The distribution of gas velocity and NOx concentration in flue gas of SCR inlet and outlet were summarized. The effect of unit load and gas velocity to denitration efficiency, ammonia escape rate and SO2/SO3 conversion rate were discussed after the test. The result favours design and retrofit of the ultra-low emissions coal-fired power unit in China. Through technical trials, a set of practical test methods suitable for the actual situation was concluded.
Simulation study on the effects of different flow conditions on the combustion of square fire
Authors: Li Tianxin , Jiao Yan
Published: December 2019

Combustion is a process in which light and heat are produced when a series of complex chemical reactions take place. Our life has long been inseparable from combustion, such as coal for power generation, fuel oil for car engines, rocket propulsion, waste incineration; but at the same time, with the development of the city, the damage caused by frequent fires is more serious. The purpose of this topic is to study the laws of plane flame combustion under different conditions. It is proposed to simulate the real plane fire combustion conditions with different flow conditions such as wind speed, combustion space and opening conditions, and propose relevant cognition and Countermeasures Based on this. Through the analysis of the above points, we can simulate the combustion situation of different weather and floors un-der different real conditions, different scale indoor environment and boundary conditions, so as to carry out new building requirements and planning, and lay a referential foundation for the evaluation and control of the fire scale.
Study on the Control Performance of Rainwater Quality in the Ini-tial Stage of Urban Runoff by New Environmentally Friendly Rainwater Pass
Authors: Cai Xinli , Zhang Qiaodan , Sun Bai , Liu ZhenShan , Zhu ShuGuang
Published: December 2019

In view of the current situation of gully in China, new type of environmentally-friendly gully with anti-mosquito and odor-reducing function has been developed. The control performance of new gully on the initial rainwater pollutants under the condition of different filter material ratio and filter bag thickness. The results show that the new environmentally-friendly gully has better removal effect of various pollutants in the initial rainwater under the condition of 1:3 filter material and 3cm filter bag. The removal rate of SS is over 80%, total nitrogen the removal rate is above 75%, and the removal rate of COD and total phosphorus is over 70%.
Bentonite replacing part of cement concrete for resistance to chloride ion attack
Authors: Luo Jie , Li Chuanchang , Ma Yafei , Wang Lei
Published: December 2019

Bentonite is known as a kind of natural pozzolan that can improve the mechanical properties of cementitious materials and reduce the overall CO2 output of cement production. This study is designed to evaluate the feasibility of using bentonite as a substitute for cement in concrete and analyze the effect of bentonite on resisting chloride ion penetration. The concrete was replaced by equal-quality bentonite for 0%, 5%, 10%, 15% and 20% cement respectively, and the water-cement ratio, fine and coarse aggregate content remained constant. The results indicated that as the bentonite content increased, the compressive strength of the mixes increased first and then decreased. The sample containing 10% bentonite got a higher compressive strength than the other samples. The rapid chloride migration (RCM) tests showed that the samples containing bentonite had better resistance to chloride ion attack than samples without bentonite against chloride, especially the sample containing 10% bentonite. It can be concluded that the concrete with 10% bentonite can improve the resistance to chloride ion diffusion with high compressive strength.
Thermal design optimization and analysis on heating load of rural buildings in northern China
Authors: Wang Weishu , Ge Xuewen , Xiong Hanlin
Published: December 2019

The envelope of rural buildings has been lack of effective and reasonable thermal insulation method and therefore its energy consumption has always been high. In order to address this problem, this paper aims to optimize the thermal design of building envelope. The simulation using DesignBuilder software for modeling and analyzing, using the orthogonal experimental design method to study the effects of external wall, external window and roof on heating load, and optimal thermal insulation scheme was obtained, which was 100mm PUF (external wall), 6mm+12mm+6mm low-E glass (external window) and 100mm PUF (roof). Results revealed that the addition of sunspace can significantly reduce the heating load and thus the selection of window thermal insulation material is very important. Compared with the condition of highest heating load, the energy-efficient rate of optimal scheme reached to 21.4%. The results of this study will serve as the idea for optimal design of rural buildings envelope.
Calculation of permeability coefficient of coal seam under rapid measurement conditions
Authors: Yang Manzheng , Li Bingrui , Li Shubo
Published: December 2019

In order to achieve rapid determination of coal seam permeability, the calculation method of coal seam permeability coefficient was studied. Based on the Darcy's law in the flow of gas in the coal seam, the relationship equation between the gas pressure of the borehole and the gas permeability coefficient of the coal seam is established under the radial unsteady flow state. The gas permeability coefficient of the coal seam is obtained by coordinate transformation and integral transformation. Solve the expression. The analysis and verification of the field measured data show that the expression of the analytical solution of the coal seam permeability coefficient is consistent with the variation of the borehole pressure-time curve, which can provide a theoretical basis for the rapid determination of coal seam permeability.
Research on Construction of Innovation Cloud Service Platform in Power Enterprise
Authors: Wei Li , Yongbin Zhao , Jieping Han , Zhiru Zhang , Hai Yu
Published: December 2019

The informalization and automation of the present power system have important influences on the smooth operation of power stations and systems. The construction of the innovation cloud service platform could help manage the power enterprise. Three components including data center, monitoring system, and decision support system are established to realize the functions of data sharing, intelligent management, and remote support. Through the establishment of the innovation cloud service platform, the whole efficiency and effectiveness of the power enterprise can be enhanced, which helps the smooth operation of the power stations and systems.
Study on Proportion of Industrial Land Use in Chinese Cities and Its Influence Factors
Authors: Lu Xu , Zhao Xiangyang , Hu Huixin
Published: December 2019

This paper analyzed the proportion of industrial land to urban construction land on the basis of available data of China's urban land utilization, study the main factors influencing the proportion of industrial land of China's cities. According to the study results, the proportion of industrial land in most China's cities did not comply with the reference standard of 15%~30%; the solid-state distribution gravity of the current proportion to urban industrial land and the span of agglomeration range were obviously deviated from the standard value scope; the proportion of industrial land showed certain administrative grade, region and scale agglomeration characteristics, and the cities suffering with larger proportion of industrial land in geographical space were mostly distributed within the traditional industrial base and the industrial belt.
Evaluation of a Tunnel Underpass Building Scheme in Yunnan Province
Authors: Yang Xiwen , Zhou Tiefeng , Cui Xiangyang , Guo Hongyan , Li Ke
Published: December 2019

Side-crossing residential buildings in tunnel construction may lead to building subsidence, structural damage by tension and affect the use of buildings. Aiming at the structural damage caused by the side-crossing structure of Re Shuitang Tunnel NO.1, by simulating the influence of tunnel construction on the building, it is concluded that the surrounding rock above the tunnel will be deformed when the tunnel crosses the building. The maximum horizontal displacement is 0.64 mm and the maximum vertical displacement is 4.43 mm. According to the analysis results, the surrounding rock above the tunnel should be strengthened in time, and attention should be paid to the impact of blasting on residential buildings, so as to ensure the safety of buildings and provide reference for future construction.
Evaluation of a tunnel in Yunnan using CRD construction method
Authors: Duan Jun , Huang Canrong , Cui Xiangyang , Li Ke , Guo Hongyan
Published: December 2019

According to the surrounding rock conditions of Re Shuitang Tunnel NO.2, it is analyzed whether the CRD method is suitable for such surrounding rock conditions. By comparing and analyzing the distribution of plastic zone of surrounding rock during construction and the displacement deformation of tunnel monitoring point, the tunnel is constructed. The plastic zone of the middle arch and the arch is obviously changed, and should be reinforced. The settlement of the right vault and the side wall is larger than the left side, which is about 19.8% and 21.9%. According to the analysis results, the vault should be reinforced in advance during tunnel construction to prevent collapse and ensure construction safety, and provide reference for future construction.
Research on the Construction Process of a Steel Truss Arch Bridge Based on BrIM
Authors: Li Haoze , Hong HuaiRui , Li Yanjun , Wang Lei
Published: December 2019

This paper combined BrIM (Bridge Information Modeling) technology with the bridge engineering to parameterize the information of a through type truss arch bridge, and BIM technology is used for information management and construction process management. Firstly, the information such as the size and material of each member of the truss arch bridge was input to the family library to construct the three-dimensional model corresponding to the plane and elevation information, which could be used for the drawing review. Then the Navisworks roaming model was used for collision check, the design development phase of the construction drawings were achieved to component geometry and the detailed tables in Revit was used to manage the materials. At last, TimeLiner in Navisworks was utilized to design the construction process so Navisworks could simulate the construction process. It is found that BrIM technology of Revit combined with Navisworks can effectively improve the communication efficiency of all side such as construction, supervision, design and construction, facilitate the industrial prefabrication of components, reduce the component collision before the construction phase, control the schedule of construction and optimize the construction process.