bluuebunny/crossref_metadata_2025 huggingface dataset:
Determination of bisphenol A, its chlorinated derivatives and structural analogues in vegetables by focussed ultrasound solid-liquid extraction and GC–MS/MS
Authors: Martín Julia , Santos Juan Luis , Malvar José Luis , Aparicio Irene , Alonso Esteban
Published: November 2019

Environmental contextFollowing stringent regulations, based on environmental health concerns, for controlling the production and usage of bisphenol A, several analogues have been developed as replacement chemicals. These analogues are now found in environmental samples at similar or even higher concentrations than bisphenol A. We report a sensitive and easy-to-perform analytical method for the determination of 11 bisphenols in vegetables.
AbstractIn this work, a sensitive, selective, fast and easy-to-perform method has been developed, based on focussed ultrasound solid-liquid extraction (FUSLE) and dispersive solid-phase extraction (d-SPE), for the multiresidue determination of bisphenol A (BPA), its chlorinated derivatives (Clx-BPA) and six structural analogues (S, F, E, B, P, AF) in vegetables. Determination was carried out by gas chromatography–tandem mass spectrometry (GC–MS/MS). A Box–Behnken design was used to optimise the most significant variables. Recoveries in the range from 74 to 105%, precision (relative standard deviation) lower than 12% and limits of quantification in the range from 0.05 to 1ngg−1 d.w. (dry weight) were achieved. The method was successfully applied to the determination of the compounds in carrot, turnip and potato samples purchased from a local market. BPA and Cl-BPA were found in most of the analysed samples at concentrations up to 8.91ngg−1 d.w. The analytical and operational properties of the method make it appropriate to be applied in food monitoring programs.
Nonequilibrium site distribution governs charge-transfer electroluminescence at disordered organic heterointerfaces
Authors: Melianas Armantas , Felekidis Nikolaos , Puttisong Yuttapoom , Meskers Stefan C. J. , Inganäs Olle , Chen Weimin M. , Kemerink Martijn
Published: November 2019

Significance

Semiconducting polymers and small molecules have promising applications in organic optoelectronic devices, such as solar cells, which typically consist of a disordered mixture of donor and acceptor materials. The performance of these devices is determined by the properties of the donor/acceptor interface. While the donor/acceptor interface is often studied by operating the solar cell device as a light-emitting diode, resulting in charge-transfer electroluminescence, the currently prevailing description of electroluminescence is not quantitative and is often inconsistent with experiments. We present an experimentally verified and quantitative model of charge-transfer electroluminescence at donor/acceptor interfaces that reconciles the inconsistencies present in the literature. Our model simultaneously and quantitatively accounts for energetic disorder and molecular vibrations governing charge transport and luminescence in organic semiconductors.
Posture verbs combined with past participles in Dutch
Authors: Bogaards Maarten
Published: November 2019

Dutch uses cardinal posture verbs (zitten‘to sit’,staan‘to stand’, andliggen‘to lie’) for all sorts of purposes, many of which have received considerable research attention – like the posture progressive, e.g.zitten te lezen‘lit. sit to read: to be reading’. This paper investigates a posture verb pattern in which a posture verb is combined with a past participle, e.g.zitten verstopt‘lit. sit hidden: to be hidden’. Previous analyses disagree on whether these patterns correspond to a fixed set of combinations, or to a productive schema with semantic restrictions. By examining over 6,000 attestations of the pattern, this paper evaluates these competing accounts, concluding that the data point strongly at productivity.
On the idiomatic nature of unproductive morphology
Authors: Clercq Karen De , Wyngaerd Guido Vanden
Published: November 2019

We present a case study in the marking of the negative prefix in
French gradable adjectives, where the productive marker iN-
alternates with a number of unproductive prefixes, like dé(s)-, dis-,
mal-, mé(s)-. We treat this as a classical case of allomorphy, and
present an account of the distribution of these allomorphs in terms of the nanosyntactic mechanism
of pointers, by which lexical items may point to other, existing, lexical items
in the postsyntactic lexicon. We claim that unproductive lexical items are not
directly accessible for the spellout mechanism, but only indirectly, via
pointers. We show how the analysis accounts for lexicalised semantics in
derivations, as well as cases where the formal relationship between derivational
pairs is not concatenative, but substitutive.
The Perfect in dialogue
Authors: Bruyn Bert Le , van der Klis Martijn , de Swart Henriëtte
Published: November 2019

We investigate the use of the perfect in dialogue in Dutch and – for comparison – report on data from
Dutch narrative discourse as well as on data from both registers in English. Our approach is corpus-based with data drawn from
Harry Potter and the Philosopher’s Stone and its translation to Dutch. Our data reveal that the Dutch
perfect is sensitive to the dialogue/narrative discourse distinction and competes with the past in dialogue
along the event/state distinction. This is in line with earlier findings by Boogaart
(1999) and de Swart (2007) and lays the foundation for an analysis of the
perfect in which we bridge the gap between the English/dialogue oriented literature (Portner 2003; Nishiyama & Koenig 2010) and the
variationist/narrative discourse oriented literature (de Swart 2007; Schaden 2009).
The VIW project
Authors: Matamala Anna
Published: November 2019

Following an overview of corpus linguistics in audiovisual translation, and more specifically in audio
description, this article presents the VIW (Visuals Into Words) project and its resulting corpus. It describes the compilation and annotation
processes, highlighting the main challenges found. The article also presents the web application that has been developed,
explaining in detail various data visualisation and search possibilities.
Estrategias de comprensión audiovisual y traducción del español al chino en una comunidad
fansub
Authors: Zhang Leticia Tian , Cassany Daniel
Published: November 2019

Documentamos y analizamos una comunidad china de fansub, que traduce y subtitula series y
películas hispanas, explorando los recursos y estrategias que se utilizan para comprender y transcribir del español y traducir al
chino. Con etnografía virtual (Hine, 2000), combinando observación participante,
entrevistas en profundidad y análisis de contenido, los resultados describen una comunidad jerárquica, con normas que regulan los
procesos colaborativos de escritura y traducción, que incluyen el uso de estrategias multimodales sofisticadas (empleo creativo de
recursos técnicos, lingüísticos y webs, prácticas de translanguaging). La comunidad también desarrolla sus
propios criterios sobre lo que es una buena traducción, con roles y actitudes de aprendices serios ante los errores cometidos.
Dichas prácticas ejemplifican otras características relevantes de las comunidades digitales (productividad fan, mediación
cultural, traducción audiovisual y amateur) y ofrecen recursos interesantes para aplicar a la enseñanza formal de
L2.
Translation, culture and politics
Authors: Tsoi Ling Yu Debbie , Liu Fung Ming Christy
Published: November 2019

This article analyzes the election slogans of Hong Kong chief executives and the titles of their policy addresses
since Hong Kong’s handover to mainland China in 1997, from the point of view of translation methods, cultural implications and
reader responses. It finds that literal translation dominates in the translation of election slogans and policy address titles,
that translated slogans and titles portray Hong Kong as a collectivist society with low power distance, and that choices between
domestication and foreignization are dependent upon individual chief executives (or nominees). The article discusses the growing
importance of the role of readers and proposes an inductive framework of interactive responses to represent the reality of
political translation in the new era brought about by digitalization.
A choreographed Sinophobia? An analysis of China’s identity from the perspective of Zambia’s Patriotic Front
Authors: Matambo Emmanuel
Published: November 2019

China’s identity in Zambia has been constructed in polarizing terms depending on the political and social standing of Zambians from political parties, civil society to ordinary citizens. The current paper looks at how the Patriotic Front (PF), from its time as an opposition to its time as a governing party, has constructed China’s identity. The ill-will towards China that the PF constructed in its opposition days is described here as Sinophobia, a fear of China, the likely consequences of its investment and the presence of Chinese nationals. The paper traces how the PF (as an opposition party) moved from being a critic of China to being a staunch defender of China and Zambia-China relations (as ruling party). The conclusions drawn are that while Sinophobia was constructed, the fears expressed by the PF during its opposition days were justifiable and have become even more significant with the deepening of Zambia-China economic relations. Furthermore, the paper argues that current hostile positions towards China by opposition parties in Zambia reinforce the argument that China is an opportune pretext for those who hope to win the support of ordinary Zambians, who endure the perceived threat that comes with Chinese investment and Chinese employers and entrepreneurs. The paper relied mainly on Zambian media, government reports and legislation documents, the author’s empirical study on China’s identity and interest in Zambia and scholarly secondary literature as sources of data.
Committed emissions and the risk of stranded assets from power plants in Latin America and the Caribbean
Authors: González-Mahecha Esperanza , Lecuyer Oskar , Hallack Michelle , Bazilian Morgan , Vogt-Schilb Adrien
Published: November 2019

Latin America and the Caribbean (LAC) has the least carbon-intensive electricity sector of any region in the world, as hydropower remains the largest source of electricity. But are current plans consistent with the international climate change goals laid out in the Paris Agreement? In this paper, we assess committed CO2 emissions from existing and planned power plants in LAC. Those are the carbon emissions that would result from the operation of fossil-fueled power plants during their typical lifetime. Committed emissions from existing power plants are close to 6.9 Gt of CO2. Building and operating all power plants that are announced, authorized, being procured, or under construction would result in 6.7 Gt of CO2 of additional commitments (for a total of 13.6 Gt of CO2). Committed emissions are above average IPCC assessments of cumulative emissions from power generation in LAC consistent with international temperature targets. To meet average carbon budgets from IPCC, 10%–16% of existing fossil-fueled power plants would need to be closed before the end of their technical lifespan. Our results suggest that building more fossil-fueled power plants in the region could jeopardize the achievement of the Paris Agreement temperature targets.
Leading source and constraint on the systematic spread of the changes in East Asian and western North Pacific summer monsoon
Authors: Zhou Shijie , Huang Ping , Huang Gang , Hu Kaiming
Published: November 2019

With ongoing global warming, the changes in EA-WNPSM rainfall—feeding over two billion people in East Asia and the Indochina Peninsula—projected by the Coupled Model Intercomparison Project Phase 5 (CMIP5) models show remarkable and unidentified inter-model spread. Here, we reveal the leading inter-model spread of EA-WNPSM changes in 28 CMIP5 models is related to a ‘dry north–wet south’ dipole in East Asia and a wet Indochina and WNP. This spread pattern of EA-WNPSM changes is induced by the spread of sea surface temperature changes in the equatorial western Pacific, and can be further traced back to an apparent discrepancy among the state-of-the-art models in simulating the tropical Pacific rainfall. An air-sea coupling processes involved with summer background circulation contribute to this robust spread pattern of EA-WNPSM changes. We can constrain the EA-WNPSM rainfall changes based on the current-future relationship and observation that there should be more rainfall increase in North China and the Korean Peninsula and less increase in South China, the Indochina Peninsula and WNP, relative to previous multi-model ensemble projections.
Research About the Coupling Effect of Environmental Factors on the Quality of Storage Water
Authors: Zhuang Wenxian , Zhu Lixiang
Published: November 2019

Although rainwater collection can alleviate water shortages in seasonally water-deficient area, the water’s sanitary condition is usually very poor. By 4 factors 3 levels orthogonal experiment, this paper studied the coupling effects of temperature, nutrient, suspended solids and total phosphorus on the bacteria content of storage water, and analyzed their variance and regression. The mechanism of how environmental factors affected storage water’s quality were explored, and a binary first-order linear correlation equation of bacterial content with temperature and nutrients was established. The research results can provide reference for the safe utilization of storage water in water-deficient area.
Analysis of Test Method for Oil and Water Relative Permeability Curve in Tight Reservoirs
Authors: Liwen Bo , Fuquan Song , Shiming Zhang
Published: November 2019

With the development of the international economy, the global demand for oil and gas resources has continued to increase in recent years. The development of high-permeability reservoirs has reached the middle and late stages, and resources are depleting. With the large-scale successful exploitation of tight oils in North America, low-permeability tight reservoirs have gradually become the main object of development. Compared with conventional reservoirs, tight reservoirs mainly develop nano- scale pore systems. It causes poor reservoir properties, high interlayer heterogeneity, low porosity and permeability, and generally no natural productivity in reservoirs. In tight reservoirs, the flow of oil-water phases is not affected by the scale, but also the wettability, they make the oil and water phases seepage more complicated. In this paper, the natural core of a tight reservoir in Daqing was selected. Experiments were carried out using two experimental methods: steady-state method and non-steady-state method. The characteristics of oil and water phases percolation in tight reservoirs were analyzed. The results by comparing the two experimental methods showed the steady state method is suitable for measuring the oil and water relative permeability curve of tight reservoirs.
CHINA’S REFERENCE TO THE EXPERIENCE OF EU WASTE DISPOSAL AND MANAGEMENT
Authors: Liping Xiao , Chenliping  , Wanchongju
Published: November 2019

With the development of global economy, the more and more domestic waste comes from human beings, the management level and efficiency of waste disposal affect the economic development of the region and the living standard of the people, and the garbage disposal mode of the European Union is advanced and efficient. It is of great reference significance for China with a large population. This paper proposes to improve the ability of garbage disposal and waste utilization in China through advertising, charging by quantity, encouraging recycling, subsidizing environmental protection enterprises, and perfecting environmental legislation.
Study on Inversion of Measured Point Acoustic Source of Traffic Noise on 2-D Space based on Geostatistical Method
Authors: Zou Dayong , Zou Yan , Du Haishun
Published: November 2019

Traffic noise pollution is a widespread public health problem in both developing and developed countries. Quickly and effectively evaluating the quality of an urban acoustic environment is an important challenge for urban planning and management. Noise map is an important tool for traffic noise management. For large area, the design of measuring point distribution is the key to improve the accuracy of regional noise map drawing. In this study, the roads in the study area are classified firstly, and the research area is divided into 11 small areas according to the division method of acoustic environment functional area, then the mathematical model of the sound pressure attenuation of the point acoustic source is established according to the propagation rule of the point acoustic source. The measured point data of traffic noise are taken as point acoustic source, the distribution rule of traffic noise acoustic source field in 2-D space is inverted by using Kriging interpolation method. After repeated verification, the interpolation accuracy of prediction whose 5-6 measuring points are set in each area to be measured can meet the requirements. The purpose of reducing the observation point and improving the accuracy of prediction is achieved.
Validation of the Hypothesis on Water Environmental Capacity of Yinghe River under Different Design Hydrological Conditions
Authors: Xiang Long , Jiao Lihong , Xiaoling MU , Fangqin YU
Published: November 2019

The water environmental capacity (WEC) in northern rivers has obvious temporal dynamic characteristics because of the seasonal change, so the calculated WEC under a single hydrological designed condition cannot reflect these changes. In this paper, one-dimensional WEC model is used to calculate the pollutant carrying capacity under three different design hydrological conditions of the Yinghe River, which belongs to Yellow River Basin. The results show that: The COD and NH3-N capacity under the staging design condition are increased 7.15% and 9.75% compared with the conventional method; the COD and NH3-N capacity of average monthly flow condition are increased 4.89% and 6.35% compared with the conventional methods; the calculation of the stage design condition is closed to the average monthly flow condition, the COD and NH3-N capacity are increased only 2.14% and 3.20% respectively. Comparing the calculation results under different design hydrological conditions, it is found that the results under the conditions of considering the dynamic characteristics can reflect the actual change law of WEC more accurately and effectively. This research has a guiding significance for realizing the total distribution and seasonal utilization of WEC in the Yinghe River.
Numerical study of the effect of inner guide vanes on performance of multi-blade centrifugal fan of range hood
Authors: Zhao Dongfang , Chen Ruoning , You Xue-yi
Published: November 2019

This paper focus on the effect of inner guide vanes on the aerodynamic performance of multi-blade centrifugal fan (MCF) used to range hood. The Reynolds-averaged Navier-Stokes equations with the RNG k-ε turbulence model are discretized and solved by Fluent. A detailed comparison of dimensionless characteristic coefficients of flow, pressure and power, between the origin MCF and the MCF with inner guide vanes is conducted for a full exhaust condition. The results suggest that the MCF with inner guide vanes perform better in terms of both flow and pressure coefficient. The exhaust airflow rate increases by 6.4% at working condition of No. 6, and there is a best efficiency point for the MCF with inner guide vanes at flow and pressure coefficient of 0.25 and 1.05, respectively. By comparing the flow field between the origin MCF and the MCF with inner guide vanes, it is found that the inner guide vanes effectively reduce flow loss near volute tongue areas.
Modeling and process design of municipal solid waste pyrolysis and gasification with a fixed-bed chamber
Authors: Erping Li , Qing Hu , Haoyun Chen , Jinling Cai , Yaqun Qiu , Zhiyuan Yu
Published: November 2019

To design the process of municipal solid waste (MSW) pyrolysis and gasification in a fixed-bed more veritably and effectively, the modeling of this process was proposed based on Gibbs energy minimization by using the Aspen plus software. The proposed model was used to predict and analyze the influences of operating parameters including gasification temperature, air-fuel ratio and steam/MSW ratio on the composition, lower heating value (LHV), carbon conversion efficiency (CCE), heat conversion efficiency (HCE)and flammable gas contents (FGC) of syngas. The results indicate that there is a good agreement between the experimental data and the simulated data obtained using this model. The predicted appropriate gasification temperature was around 900°C while the suitable air-fuel ratio was approximately 0.4, and the beast steam/MSW ratio was around 0.4. A novel configuration of atmospheric fixed-bed chamber is designed for the municipal solid waste pyrolysis and gasification process based on the experimental and simulated results. The designed configuration was feasible with achieved heat balance of the system.
Planning Method for Power-Gas-Heat-Steam Integrated Energy System in Industrial Park Considering Annual Comprehensive Cost
Authors: PuZhao  , QunLin  , Xie Haokai , Ji Xudong , Pan Lezhen , Li Daren , Zhu Haili , Liu Wenlin
Published: November 2019

The current energy system in industrial parks have the problem of poor investment efficiency and low energy utilization rate. A planning method for the park’s power-gas-heat-steam integrated energy system(IES) considering annual comprehensive cost is proposed. Firstly, based on the uncertainty of renewable energy and the characteristics of energy supply and consumption in the park, the structure of the integrated energy system is established. Papersets the minimum annual comprehensive cost including investment, operation, maintenance cost and environmental protection cost as the optimization goal. The mixed integer linear programming(MILP) algorithm is used to optimize the equipment selection, capacity planning and equipment operation mode at the same time. Through the example simulation, the planning scheme under different scenarios is given, and the effectiveness of the method is verified.
Research on the Collaborative Innovation of Military-Civilian Integration Based on the Perspective of Industrial Agglomeration
Authors: Li Yun , Wang Wengang , Sun Junna
Published: November 2019

Based on the classification and analysis of the main subjects and function orientation of collaborative innovation of military-civilian integration industry, this paper demonstrates how to enhance the collaborative innovation capability in the military-civilian integration industry from the perspective of industrial agglomeration, constructs the theoretical framework of collaborative innovation system, and finally proposes suggestions on improving the collaborative innovation capability of the industry.
Change of Intergranular Corrosion Sensitivity of HR3C Steel Under the Condition of 700°C Aging
Authors: Li Xinmei , Zhang Zhongwen , Li Xiulian , Zou Yong , Du Baoshuai
Published: November 2019

This paper studies the change of intergranular corrosion sensitivity of HR3C steel under the condition of 700°C aging by using the scanning electron microscope, energy disperse spectroscopy (EDS), and double-loop Electrochemical potentiokinetic reactivation (EPR) method. The results show that the main reason for the intergranular corrosion of HR3C steel after aging treatment is the precipitation of M23C6 along the grain boundary. The morphology and size of M23C6 also matters in this regard. At the same time, M23C6 precipitation also causes corrosion of Cr around it. M23C6 precipitates at the fastest speed at the beginning of aging, which leads to the rapid increase of intergranular corrosion sensitivity. As aging continues, M23C6 precipitation becomes gradually stable. After the precipitation of large-sized isolated granules, the intergranular corrosion sensitivity of HR3C steel decreases rapidly and maintains at a low level.
Numerical simulation and prediction of groundwater pollution caused by the leakage of sulphuric acid storage tank with GMS model
Authors: Liang Yimin , Lan Junkang
Published: November 2019

Because of the concentration of SO4
2- in the sulfuric acid tank is extremely high, the leakage of sulphuric acid storage tank is great harm to groundwater environment. Once the accident of leakage take place, the drinking water sources of residents around the leak point will be greatly polluted. In order to find out the severity of groundwater pollution and the migration of pollutants after leakage, a GMS software was used to simulate and predict. During simulation, the scope of the simulation area and its hydrogeological conditions were determined by hydrogeological surveying, mapping and drilling. The parameters used in the simulation are obtained from field tests. The simulation results show that the concentration of SO4
2-at the central pollution halo is as high as 788050 mg/L after 27.39 years of the leakage accident happened. Due to the low permeability of the formations, the decontamination effect of the polluted halo mainly depends on the slow dilution of aquifer. The process of the completely purifying pollutants in groundwater will takes a long time.
Environmental Cost Research Hotspots and Frontier Analysis —Visual Analysis Based on CiteSpaceV
Authors: Han Dan , Chen Xuemei
Published: November 2019

Using the core collection library of web of science as the data source, we obtained 996 documents related to environmental cost in the core collection of web of science from 1986 to 2019, and then used the information visualization software CitespaceV to draw scientific knowledge map. We found that: the research group is characterized by large dispersion and small concentration, and no academic community has been formed among core scholars; research institutes are concentrated in universities; the research has gone through two processes of germination and development, mainly focusing on the mechanism and accounting method of environmental cost impact and environmental cost management;new energy, new materials, resource consumption and multi-objective optimization have become popular word frequency in recent years. Under the guidance of the new economic development model of advocating green environmental protection and sustainable development, accounting is the constant theme of environmental cost research, and the development and utilization of clean production and renewable energy is the leading direction of environmental cost research in the future.
The research on the influence of carbon content in coal slag on heat loss from solid incomplete combustion
Authors: Cai Qin
Published: November 2019

The influence of carbon content in coal slag on heat loss from solid incomplete combustion was analyzed by thermal balance calculation of the boiler. The results showed that the heat loss from solid incomplete combustion increased with the increase of carbon content in slag when other operating parameters were constant. The quality of coal, especially the calorific value had an important influence on the carbon content of the slag. The heat loss from solid incomplete combustion decreased with the increase of calorific value. As a result, in order to reduce the heat loss from solid incomplete combustion, the type of coal used should be consistent with the type of coal designed as much as possible.
Analysis of the Rise and Characteristics of Environmental Diplomacy in Australia
Authors: Zeyuan Du
Published: November 2019

In order to explore the rise and characteristics of environmental diplomacy in Australia, the rise and characteristics of environmental diplomacy in Australia through literature review and analysis methods was studied in this research. The results show that Australia’s environmental diplomacy is influenced by international environmental system, international public opinion, national interest and other factors, and its characteristics include diversified participation, strategic promotion of the status of domestic environmental diplomacy, and environmental diplomacy with national interests at the top. To sum up, Australia’s environmental diplomacy have been affected by both international environmental politics and domestic national interest protectionism since ancient times. Therefore, the analysis of the rise of environmental diplomacy in Australian and its characteristics has a positive effect on subsequent research.
Research on Identification Method of the Inefficient and Ineffective Circulation Well Layer in Tracer Flow Simulation
Authors: Jia Wang
Published: November 2019

The development of old Daqing Oilfield has entered the late stage of extra-high water cut, and the situation of inefficient and ineffective circulation is serious. Based only on the static and dynamic geological parameters, it is far from satisfying the requirement of analysis and judgement in the case of that the current well pattern, well spacing and dynamic state have all changed greatly, so the difficulty of development and adjustment is increasing. In this paper, tracer numerical simulation method is used to quantitatively study the directional injection-production rate of injection-production well layers, and the chart of the relationship between liquid production and water cut under different oil prices is established. The benefit types of production layers in production wells are classified and quantitatively evaluated, and then the inefficient and ineffective layers of production wells and their main inflow direction are accurately identified, which provides a basis for water control and efficiency improvement of inefficient and ineffective circulation well layers.
Problems and Countermeasures in the Construction of Characteristic Towns—Take Shanghai as an Example
Authors: Mo Hu , Lin LI , Yong Meng
Published: November 2019

As an important breakthrough to speed up the new-type urbanization, the characteristic towns are conducive to solving the problem of developing kinetic energy transformation in the current supply-side structural reform in China. Shanghai, as a global city, will create several distinctive towns with characteristics that highlighting local culture, which will contribute to the further improvement of regional development and the overall improvement of urban competitiveness. Based on the overall development in Shanghai, this paper fully evaluates the existing resource endowments and development status of Shanghai’s existing characteristic towns through empirical research. Based on this, it sorts out the major bottlenecks and the goals and directions of the construction of characteristic towns from the perspective of “people-oriented”, coordinating the residents’ life, creative talents’ work as well as tourists’ travel. Finally, it gives specific direction and policy initiatives from the layout, characteristics, resource, industry, policy and other aspects to promote the construction of characteristic towns.
Preparation of natural polysaccharide nanosphere carrier and its application in antitumor
Authors: Liu Xianwu , Yang Ziming , Li Puwang , He Zuyu , Zhou Chuang , Chen Yu , Feng Changgen , Huang Guocong
Published: November 2019

With the rapid development of nanotechnology, more and more polymer materials have been excavated for the preparation of nano drug microspheres for the treatment of malignant tumors. Due to its wide range of sources, low price, good biocompatibility and degradability, natural polysaccharides are widely used in the research of nano-microsphere carriers to achieve sustained release control of embedded drugs. In this paper, we mainly introduce the preparation methods of chitosan, sodium alginate and chitosan-sodium alginate nanospheres and their application research in anti-tumor, and look forward to their future development.
A Meta-Analysis of the Treatment of Diabetic Nephropathy using Astragalus Injection combined with Captopril
Authors: Xu Yan
Published: November 2019

To observe the effectiveness and safety of using astragalus injection combined with captopril for diabetic nephropathy. The method is using computer database searches and manual retrieval of relevant journals. Astragalus injection combined with captopril was the test drug group. The data was analyzed using Review Manager 5.1 according to the evaluation criteria of RCT recommended by Cochrane 4.2.2. 11RCT and total 641 cases of early and clinical diabetic nephropathy were included. Astragalus injection combined with captopril was more excellent than the control group in the lower of 24hUAER [MD=-21.09, (-37.21,-4.96), P<0.01], 24h urinary protein [MD =- 0.38, (- 47, -0.28), P <0.01], the efficient [RR=1.29, (1.06,1.57), P=0.01], BUN [MD=-0.36, (-0.62,-0.11), P=0.004], SCr [MD=-4.13, (-7.94,-0.33), P=0.03], FPG [MD=-0.96, (-1.67,-0.24), P=0.009], TC [MD=-1.42, (-1.66,-1.18), P<0.01], and TG [MD=-0.45, (-0.59,-0.32), P<0.01]. There was no significance in 2h PG [MD=-0.07, (-0.65,0.51), P=0.81], and blood pressure (2 =0.15, P=0.69).. Astragalus injection combined with captopril was effect and safe in the lower of 24hUAER and the efficient for the patients with diabetic nephropathy. It also needs more randomized controlled trials for high-quality evaluation.
Anti-inflammatory effect and chemical constituents of Microcos paniculata total flavone glycosides fraction
Authors: Yuan Min , Zhang Chumei , He Zhuoru , Liu Changle , Li Kunping
Published: November 2019

Microcos paniculata is an edible and medicinal plant in Lingnan, China. The present study investigated the anti-inflammatory effect and chemical constituents of its’ total flavone glycosides (MpTFG) fraction. MpTFG (10, 15, 20 μg/mL) was applied to 1 μg/mL LPS-induced RAW 264.7 macrophages in vitro; and MpTFG (10, 20, 40 mg/kg body weight) was employed to xylene-induced ear edema test. As a result, 20 μg/mL MpTFG decreased the levels of pro-inflammatory cytokines IL-6, IL-1β and TNF-α in LPS-stimulated RAW 264.7 cells supernatant significantly, and 40 mg/kg MpTFG could effectively ameliorate xylene-induced mice ear swelling. The results showed that MpTFG had potential anti-inflammatory effect. Meanwhile, ten compounds were purified by making use of macro-porous resin, sephadex LH-20 gel column chromatography and semi-preparation HPLC successively. They were characterized to be vicenin-2 (i), isoschaftoside (ii), schaftoside (iii), vitexin (iv), vicenin-1 (v), isovitexin (vi), isoviolanthin (vii), nicotiflorin (viii), astragalin (ix), narcissoside (x) by 1H-NMR, 13C-NMR and HRMS spectral analysis.
A Fetal Heart Rate Signal Source Recognition Model Based on Fast Fourier Transform and Ensemble Learning
Authors: Huang Meijia , Wang Huijin , Zhang Lu
Published: November 2019

Fetal heart rate monitoring is a necessary routine examination item in obstetric clinic, which has important significance in the health examination of the perinatal fetus. Accurate extraction of fetal heart rate is a key technology in electronic fetal monitoring technology. There are still some difficulties and challenges in extracting the fetal heart rate from the ultrasound Doppler signals. The ultrasound Doppler fetal monitoring probe is difficult to maintain in the correct position, therefore, the Doppler ultrasound signals obtained may be the abdominal aorta signals which will cause fetal heart rate extraction error. In this paper, a signal source recognition model based on fast Fourier transform(FFT) and ensemble learning for ultrasound Doppler signals source recognition is proposed. The spectral features of the signals are extracted by FFT, and the spectral features are used as the input of ensemble learning model to decide whether the mother’s abdominal aorta signals are detected. The experimental results show that the proposed model can achieve the best recognition effect with the rule that the signals are regarded as from abdominal aorta if more than 93% of the signals get the negative output by the model within the time window of more than 13 seconds.
Pore Structure Characteristics Analysis of Tight Reservoir1
Authors: Fuqaun Song , Haoze Gao , Tao Dai
Published: November 2019

In the development of oil and gas reservoir, tight oil and gas reservoir refers to the oil and gas reservoir with liquid measured permeability of 0.1 milli- Darcy, and the pore structure characteristics of tight oil reservoir is an important factor affecting its development effect. In this paper, constant-rate mercury penetration, nuclear magnetic resonance and scanning electron microscopy are used to detect the rock samples of a tight oil reservoir in Daqing, and analyse the distribution of pores and throats in the reservoir. And it turns out: Tight sandstone pore throats in this block are distributed at 0.01μm1μm. The average pore throat radius was 0.43μm. The pore radius ranged from 80μm to 180μm, with an average radius of 122.7μm and the average pore radius was 124μm. The analysis of experimental data shows that the permeability of tight sandstone is mainly determined by throat radius and has nothing to do with pore size. The results of the three test methods are basically consistent and can be verified with each other.
Determination of the shear strength of interlayer materials in a clastic rock Aera
Authors: Jianjun Gan
Published: November 2019

This study focus on the influence of the shear strength in unsaturated soil under different matric suction. 12 groups of GDS tests under different conditions were executed to analysis the relationship between net confining pressure and deviatoric stress. Then, used the unsaturated soil strength theory to calculated the shear strength of the weak interlayer. The results show that under the same confining pressure and unsaturated conditions, the deviatoric stress increase as the matric suction increases. The total cohesive force and the matrix suction of a linear relationship during the test process, the growth of the slope angle for the matrix suction is 6.6°. Finally, a modified formula for shear strength of the soft sandwich silty clay in this landslide was proposed.
Flammability properties of intumescent flame retardant polylactic acid/layered silicate nanocomposites
Authors: Zhan Jing , Liu Xueli , Yang Tan , Cao Chunhua
Published: November 2019

Novel intumescent flame retardant polylactic acid (PLA) composites containing different melamine polyphosphate (MPP)/pentaerythritol (PER) and organicmodified montmorillonite (OMT) formulations have been prepared and studied. The synthetic Fe-montmorillonite (Fe-MMT) and natural Na-montmorillonite (Na-MMT) are chosen and modified by hexadecyltrimethylammonium bromide (CTAB). The flammability properties of PLA composites are investigated by UL-94 tests, limited oxygen index (LOI) and microscale combustion calorimetry (MCC) experiments. It’s found that the incorporation of organically modified layered silicate can further improve the flame retardancy of PLA composites, and Fe-OMT is more effective than Na-OMT. In addition, the effect of OMT on thermal degradation stability of PLA composites is analyzed using thermogravimetric analysis (TGA). The results show the addition of Fe-OMT decreases the onset decomposition temperature, but remarkably increases the char residue.
The Only Source of Cu Content from River Flow in Jiaozhou Bay
Authors: Yang Dongfang , Tao Wenliang , Yang Danfeng , Zhu Sixi , Wang Ming
Published: November 2019

In August and October, 1991, the variation of Cu content in Jiaozhou Bay was 0.13-0.67μg/L, satisfying the Case I Sea Water Quality Standard. It showed that the water was not polluted by Cu content. Cu content was only transported by the river flow, specifically, 0.64μg/L from Haibo River, 0.59μg/L from Licun River and 0.67μg/L from Loushan River. The three rivers were not polluted by Cu content. The Cu content emitted by human was in the order of Loushan River, Haibo River and Licun River from high to low. However, the Cu contents in the three rivers were far less than 5.00μg/L, showing that the land was not polluted by Cu. Transported by different river flows, the Cu contents reaching the ocean were basically consistent, with a variation of 0.08μg/L. Further, the modelling diagram was established to display the transport path of Cu content to land, atmosphere and ocean in a quantitative way.
Study on the Size Effect of high-water materials
Authors: Lu Yonghu , Liu Changwu , Zhou Xianliang , Zhang Lianwei
Published: November 2019

The use of high-water materials in mining and filling is conducive to stope stress control and goaf stability. Since the filling body is huge, the size effect tends to affect the mechanical and deformation characteristics to some extent. Therefore, study in this respect is beneficial to engineering design and construction. To study the size effect of the high-water materials with different water-cement ratios, this paper first carries out experimental analysis of the size effect of high-water materials with different aspect ratios and explores the influence of aspect ratio changes on their mechanical characteristics; this paper then studies the size effect of high-water materials while taking the aspect ratio as 2:1. The test results are as follows: (1) the strength of high-water materials decreases first and then decreases with the increase of aspect ratio; the strength reaches the minimum with a low degree of discretization when the ratio is 2. (2) With the increase of aspect ratio, the plasticity of high-water materials decreases, while its modulus increases continuously; the strain corresponding to the peak strength decreases, and the residual peak ratio decreases continuously, so the specimen is more prone to instability. (3) Splitting failure is the failure mode of high-water materials, which does not change with size; based on Von. Mises theorem, the consistency of theoretical and experimental results is proved. (4) The strength of the high-water material decreases with the increase of size; the size effect becomes more significant as the water-cement ratio increases.
Study on a New Type of Air-exchange Device for Refrigerated Container
Authors: Kaitai Hua
Published: November 2019

In order to optimize the inconvenience of the switch operation of the existing air-exchange device and the loosening problem in the complex environment during transportation, a new type of air-exchange device for container is designed in this paper. The device adopts rotating opening, embedded sealing structure of sealing plug and combined with spring function, which effectively realizes the stability and reliability of the opening and closing of the air-exchange device. The structure is simple and the operation is also convenient. Therefore, the new air-exchange device has a wide application prospect in refrigerated containers.
Design and Analysis of Double-Hole Box Culvert Structure Based on Beam Element Modeling
Authors: Shi Jing-xian
Published: November 2019

In this paper, a double-hole box culvert on a municipal road in Yunnan, China, is taken as an example. Firstly, the sizes of each position are drawn up, and the bridge and culvert structure analysis software Midas Civil is used to simulate the double-hole box culvert by using beam element. The results show that the roof and bottom of box culvert can meet the requirements of normal section bearing capacity of Flexural members, crack width in service stage and various requirements in construction stage; the web and side plates of box culvert can meet the requirements of strength and stiffness of bearing capacity of axially eccentric compressive members.
Research on comprehensive efficiency evaluation technology of regional photovoltaic power generation
Authors: Miao Xujuan , Xin Zhao , Yan Men , Chao Chen
Published: November 2019

Under the background of global potential energy crisis and regional environmental pollution, China‘s photovoltaic power generation still faces the key issue of sustainable development under the good prospect of large-scale development and utilization. Based on the identification and analysis of the factors affecting the overall efficiency of photovoltaic power generation, the system dynamics model is introduced to construct a comprehensive evaluation model of photovoltaic power generation, and the comprehensive efficiency transmission mechanism of photovoltaic power generation is studied. The comprehensive efficiency of photovoltaic power generation in Xinjiang in 2015-2017 is studied. The research results can provide support for the sustainable development of photovoltaic power generation and provide guidance for improving the efficiency of photovoltaic power generation.
Analysis and diagnosis of hot spot failure in c-Si PV module
Authors: Ping Yun , Yuzheng Liu , Heng Liu , Zhixiang Zhang
Published: November 2019

The hot spot types in crystalline silicon photovoltaic(c-Si PV) module can be divided into the followings: series resistance type, cell reverse biased type, bypass diode over-current type and direct-current (DC) arc type. The most common type was cell reverse biased type (hot spot as we know). By collecting all kinds of failed PV module (PID, aging, glass fragmentation, short circuit of bypass diode, and back sheet cracking) in practical power station, the characteristic parameter of cell reverse biased hot spot was determined after comparative analysis of IV curve. Based on this characteristic parameter, a set of diagnostic procedure was designed. Then we tested the procedure on the power optimizer, the diagnostic accuracy of hot spot was 95% and the recall rate was 96%. In order to reduce the temperature of hot spot, we added aluminum fins on the back of PV module, and the temperature of hot spot was lowered maximum by 19.3°C compared with conventional module, which indicated that the aluminium fins have a certain cooling effect.
Risk Management and Control Model of UHV Construction Cost Based on Risk Matrix Method
Authors: Chen Tianqiong
Published: November 2019

Strengthening cost risk management and control is of great practical significance for promoting UHV project construction with high quality. Firstly, the UHV project construction cost index system which covers construction engineering fee, installation engineering fee, equipment purchase fee, other expenses and basic reserve fee was constructed. Secondly, the cost risk assessment model of UHV project construction based on the optimized risk matrix was proposed. Finally, a case study was carried out to verify the scientificity and rationality of the model.
Research on 5G optical transport schemes
Authors: Cheng Yitai
Published: November 2019

With the rapid development of 5G technology, its network architecture has changed a lot compared with 4G, which brings many challenges to optical transport network. In this paper, we first discuss the network architecture difference between 4G and 5G. Then, we investigate the optical transport schemes of 5G network, including fronthaul schemes, middlehaul schemes and backhaul schemes, respectively.
The optimization research of investment management in power grid enterprise
Authors: Zhang Qian , Xia Liyu , He Wan
Published: November 2019

As an important platform for the power grid enterprise, investment management is an important gripper for implementing precise investment and lean management, and has a great significance on ensuring the strategic, planning of the company and achieving the overall efficiency and effectiveness. In recent years power grid enterprise put a high premium on investment management, and pay attention on the core role of investment management in enterprise management. However, with the continuous advancement of the power system reform and state-owned enterprise reform, the power grid enterprises face many new challenges in operation management. In order to improve the power grid enterprises’ management efficiency, it is necessary for the power grid enterprises to improve the content and models of investment management.