It is still unclear that whether intercropping system (IS) could improve the crop biomass and yield in karst soil. A field experiment was conducted to analyze the effects of IS on maize/soybean biomass, root morphology and yield. The results showed that the maize aboveground biomass, root biomass, and...

Estuary wetlands have been continuing to degrade under the pressures of natural factors and anthropogenic activities. The goal of restoration is to re-establish the hydrologic connection, and one of the most important methods of restoring abandoned wetlands is supplying freshwater to degraded wetlands....

As partial discharge (PD) can reflect the type of insulation defects in a gas insulated switchgear (GIS) and the damage of GIS caused by different types of discharge varies evidently, identifying the type of discharge correctly is of significant value in ensuring the safe and reliable operation, assessing...

An environmental simulation system of low/high temperature for great space that is for a function test on its unfolding structure of some aerials is designed based on air refrigeration principle. According to its practical run at chamber temperature of -70 , its main parts such as driers, turbines, environmental...

Unlike-doublet impinging jets are frequently used for liquid fuel and oxidizer atomization inside small rocket engines. An accurate setup for the primary atomization of impinging jets is crucial for combustion simulation accuracy. Spray location, spray angle, spray flow rate angular distribution, droplet...

Oil reservoir north of Zhanzhol, a fracture-pore typed carbonate oilfield, has a variety of reservoir types. According to the combination pattern of different pores and the relationship between porosity and permeability, carbonate reservoirs are classified into four types which are fracture-cavity typed,...

On the basis of the ship engine room noise analysis, the paper discusses the application of the noise power generation technology in ship engine rooms. According to the available research results about acoustoelectric conversion, it puts forward that the reasonable distribution and installation of noise...

This study was undertaken to determine whether 2-(3,4-dichlorophenoxy)-triethylamine (DCPTA) improve plant growth of Cd-exposed hemp (Cannabis sativa L.) plants. The results showed that exposure of plants to 50 mg Cd kg 1 soil resulted in an increase in the shoot and root biomass, as well as the root/shoot...

Distributary channel is the main type of sand bodies in shallow delta plain. Based on logging geology, sedimentology, sequence stratigraphy and development geology, we systematically analyzed single sand body in the compound distributary channel of shallow delta. Shallow delta plain has well-developed...

The paper presents a novel method for the spectrophotometric determination of trace Cu2+ after flotation separation using sodium chloride-ammonium thiocyanate-dodecyl dimethyl benzyl ammonium chloride system.The effects of the dosages of NH4SCN and dodecyl dimethyl benzyl ammonium chloride (DDBAC),various...

Interactions of polycyclic aromatic hydrocarbons (PAHs) with graphene quantum dot (GQD) and graphene oxide quantum dot (GOQD) were probed by local density approximation of density functional theory with empirical dispersion correction. Simulation reveals that van der Waals force is the main mechanism...

In the progress of industrial production, coal gangue, fly ash and other wastes was produced, which contains aluminum, iron, silicon and other important components of coagulants. Made full use of those materials could change it from waste into valuable products and used for wastewater treatment which...

Approach presents an intelligent inspection system for transmission line based on GIS(Geographic Information System). The construction principle, system structure and function of the intelligent inspection system are introduced in detail. The basic idea of the system is to embed GIS handheld intelligent...

Aiming at the problem that under the condition of multi grid-connection inverters, the dilution effect can easily cause islanding detection failure of Sandia Frequency Shift (SFS) method, a new phase locked loop based composite islanding detection strategy for multi grid-connected inverters is proposed....

This paper introduces the configuration and operation principle of the hydraulic in-wheel motor drive system for heavy truck. According to the regenerative braking function of the system, the distribution algorithm of braking force is proposed and a regenerative braking control strategy is developed...

To evaluate soil fertility of karst land undergoing rocky desertification (RD), the changing trend of soil microbial biomass properties over the succession of RD were studied by investigating the stands and analyzing the soil samples with four different RD grades in the northwestern Hunan province, China....

A new extraction of flavonoids from navel orange peel by optimization of ultrasound-assisted were studied , The effects of ethanol concentration, liquid/solid ratio, extraction temperature, ultrasonic time, and extraction time were investigated. The results showed that: the extraction yield of flavonoids...

40 SD rats weighing 200 ± 10g were used, 12 of 40 rats were randomly selected as those in sham group, and the remaining 28 were used to establish the acetic acid-induced gastric ulcers to observe effects of smoking on the rat gastric ulcer and ulcer area. The acetic acid-induced gastric ulcer model in...

This paper introduces the basic principle of Boost circuit topology and photovoltaic maximum power point tracking technology.According to the characteristics of photovoltaic cells output nonlinearity, this paper designs a fuzzy-PID controller to track the maximum power point of PV cell. The controller...

Ultrafine particles PM2.5 produced during combustion is the main source of environment pollution and has raised the widespread concern around the world. There are several studies about acoustic agglomeration currently, but its removal efficiency is not high, so the scholars have proposed to join the...

Transmission line pulse (TLP) is a useful tool in immunity test of electrostatic discharge (ESD). The pulse width and rising time of TLP waveform is the key point of the anti-static interference test. A TLP generator is built based on the principle of TLP. The generator is used to test and analyze influences...

This paper presents a dynamic simulation test method of transformer protection based on Advanced Digital Power System Simulator, ADPSS. Firstly, a simulation model of three-phase three-winding transformer has been proposed in ETSDAC, a commercial electromagnetic transient simulation program. Then, according...

Normally, transformer overloading capacity is calculated using method in guide for loading mineral-oil-immersed transformers. However, the method is not so accurate for every transformer. Therefore, a modified BP neural network based on transformer overloading calculation model is proposed. With BP neural...

In the present study, new conductive and anti-corrosion coating which is suitable for grounding grid with a carbon-based conductive filler was investigated. This study determined using epoxy resin as a film forming binder, multi-walled carbon nanotubes as conductive filler, KH550 as the preferred coupling...

The article started with heat allocation formula analysis, the author studied on the on-off time and area heat metering system characteristics, and discussed influence factors of system characteristics which include temperature difference between supply water and return water, radiator type to fairness...

In recent years, the wind power industry in China developed rapidly, by the people's attention. The development of wind power has brought us considerable economic benefits and significant social benefits, but also to the stability of power system has brought a significant impact. Low voltage ride through...

This paper analyses the background of the proposal of sustainable development in detail. The essence of sustainable development is revealed. The energy analysis method for sustainable development is presented. Some practical advices on the implementation of sustainable development are given. The work...

It’s been widely used that Synchronize data Sampling with GPS clock. But, the precision should be improved when it’s used for dielectric loss test in a substation. In this article, it’s studied that a portable testing system which based on high-precision sampling synchronously with GPS and wireless....

In this paper, in the neglect of the core of the magnetic hysteresis, eddy current effect and the core skin effect and based on the analysis and summary of previous experience, an analytical method to determine the parameters of the transformer's turn to turn short circuit fault is improved and perfected...

In this paper we present the evaluation results of solar thermal cooling performance of PDMS/glass composite lamination in which the microfluidic flowpaths have been fabricated on the interface between PDMS and glass. The microfluidic flowpaths was designed into pinnate-like and its pattern was transferred...

In this research, polycarboxylate superplasticizer is synthetized by solution polymerization. Some influencing factors on synthesis of the product are studied such as raw material composition, reaction time, initiator and pH value of the reaction system. The results show: When the amount of MA used in...

Interconnected hierarchical porous carbon (IHPC) was prepared by a poly(high internal phase emulsion) (polyHIPE) and carbonation method based on phenolic-formaldehyde resin for supercapacitors. Structural and morphological characterizations of IHPC were carried out using field emission scanning electron...

It has become an action plan to develop biodiesel in China. The botanical and laboratory investigations together with literature surveys had been used to prospect potential plants for biodiesel development. Based on field surveys and collections of specimens and samples, 422 oil-bearing plant species...

The MnOx nanowires loaded by cerium oxide are synthesized using hydrothermal method and impregnation method. The products exhibit excellent performance on selective catalytic reduction denitration experiments at low temperature. Meanwhile, the obtianed Mn Ce composite oxide are characterized by X-ray...

This paper researches HVDC operating characteristics and its sensitive factors of islanding system based on JinSu UHVDC in China. Several factors such as water hammer effect coefficient, parameter of governor, load model, DC frequency controller, power system operation mode and stability control measure...

To verify the battery bracket fatigue life of electric bus , the finite element model of the battery bracket is built, and the equivalent stress distribution of the frame was got. Multi-body dynamics vehicle model was built in ADAMS/Car. The simulation analysis was conducted based on the road spectrum...

With the continuous improvement of living standard and the acceleration of urbanization process, the output of city rubbish in unceasing increase year by year and the city rubbish is growing at an annual rate of 9% ~ 10%.Relative to the method of incineration and compost treatment, sanitary landfill...

Soil moisture, as an important existing form of water resources, has close ties with the field of agriculture, hydrology and environment. Hydrus model is an important means to simulate the complex soil moisture movement. In this paper, Hydrus-3D model was used to simulate soil moisture, the model was...

The feature extraction and pattern recognition of partial discharge signal are key steps of equipment condition assessment and fault diagnosis. Time-frequency analysis on PD pulse can make up for deficiencies of traditional phase statistical method by extracting more comprehensive and effective information...

Ag/AgCl/Ag3PO4 plasmonic nanocatalysts were prepared through the ion exchange and subsequently light-induced process. The obtained samples showed a high photodegradation capacity for prometryn, bentazone and metribuzin under visible light irradiation. Effects of reduction time (RT) and Cl/P in the synthesis...

Viscosity restrain the road performance of asphalt mixture with geothermal regeneration. In the design and construction of the geothermal renewable asphalt pavement, the thickness of the regenerated layer is one of the most important factors that affect the mechanical response of the material. In order...

In this paper we study the relationship between economy growth and carbon dioxide emissions in Hubei Province by building Environmental Kuznets Curve, adding some influencing factors. The result shows that there is Kuznets' inverted U-shaped curve in Hubei Province, and the inflection point did exist...

A swirling-style propellant water ramjet model, which was established on the base of a particular model of column-style propellant water ramjet, was employed to numerically simulate the influence on engine performance at difference inlet velocities. The three-dimensional geometrical model was established...

Co-disposal of sewage sludge in cement kiln is an economic and feasible method of resource utilization. The industrial test of co-disposal sludge was carried out in Beijing Taihangqianjing cement limited company. The semi drying sludge as a raw material was transported to the decomposition furnace for...

In this study, statistical theory is employed to identify abnormal online monitoring data and substandard effluent water quality in a wastewater treatment plant (WTP) of northern China. The effluent water quality can be monitored and checked by the national standard (GB18918-2002). The detection of abnormal...

The core loss test is an common-used method to diagnose the core fault of large turbo generator. However, it takes a lot of time to connect cables before and disconnect cables after the power-on test using traditional operational approach. To make the core loss test more convenient to conduct, a new...

The different values of pH, EPS dosage, initial uranium concentration, dialysis temperature and other factors, were investigated of anaerobic sludge extracellular polymer (EPS) on U (VI) in wastewater by adsorption effect. The results show that, the best pH of EPS adsorption of uranium is 6, when the...

This study designed a green one-pot method for furfural production from corn cobs that were heterogeneously catalyzed by recoverable solid-acid ZSM-5. The highest furfural yield of 78.5% was obtained under the following conditions: 473 K, 30% ZSM-5, 15 mL of toluene, and 500 mM of NaCl for 2 h. Catalyst...

Since the integrated function of wetland can cater to the consumption psychology and the higher level of spiritual pursuit of tourists, wetland tourism has been enjoying a great popularity among tourists from beginning. The traditional tourism exploitation mode is not fit for the unique geographical...

With the increasing energy demand, the urbanization level of China has been greatly improved in last decades. This paper utilized a static CGE model to simulate the impact of urbanization against energy consumption based on data from IO-table 2007. The result implies that urbanization imposed salient...

Four soil surface samples were collected and analyzed with GC-MS method to study the temporal distribution of typical petroleum pollutants in the oil-polluted soil of Gudao Region.The results showed that the concentrations of five typical petroleum pollutants increased with the increase of oil well exploitation...

The present work mainly focuses on the influencing factors concerning copper molybdenum bulk flotation. Test samples which using four kinds of -100+200 mesh pure minerals contain Cu:0.4%, Mo:0.04%, S:3% respectively. The bulk flotation results show that using z-200+ kerosene as collectors in Cu-Mo mixed...

The amino modification montmorillonite was prepared using the cetyl trimethyl ammonium bromide as modifier by the microwave irradiation and common heating method. According to the analysis of infrared spectra, scanning electron microscope and specific surface area, it is found that the larger amount...

Based on the field investigations in the past and all published literatures, we studied the faunal composition and distributional pattern of Miridae (Hemiptera) from the Hulun Buir City, Inner Mongolia of China. In total, 122 species, which belonging to 4 subfamilies 51 genera were recorded in there....

The ZY-1strain, a fresh water microalgae isolated in our former work, was viewed as a possible means of CO2 fixation from fuel gas. In order to confirm the possibility, the influence of SO2, NO and dissolved components of the soot dust in fuel gas on its growth was investigated. The results were showed....

The development of bio-fuels were introduced, and it has greatly potential application. Pyrolysis process was benefit for the second-generation biofuels. The reaction mechanism of pyrolysis were summarized elaborately in this review. Main pyrolysis reactors and their research status were described, at...

In this paper, we prepared Ni/C, Pd/C and Pd-Ni/C binary alloy nano-catalysts by the impregnation-reduction method. The structures of all catalysts were characterized by XRD and TEM. The electro-catalytic performance of all catalysts on H2O2 reduction were studied by cyclic voltammetry(CV) and linear...

The Carboniferous carbonate rocks at eastern margin of the Pre-Caspian Basin originally depositing at the passive continental margin of Eastern European craton are closely related to accumulation of lithologic reservoirs. Three kinds of lithologic reservoirs, i.e. sedimentary-related, diagenetic-related...

According to the soft rock roadway geological, productive conditions and the actual project features in Zhengling Coal-mine, from the theory with practical point of view this study analysis the key damage factors of the soft rock roadway. A new kind of support scheme, O-arch combination support scheme,...

World widely speaking, the power industry is an important area of carbon emission and carbon reduction. It is also one of the main carbon trading market. Carbon-constrained electricity market will profoundly alter the original model of electricity production and electricity trading. Consequently, the...

The 150 tpd facilities of sewage sludge pump directly into precalciners was set up in cement plant of 3200 tpd clinker production. The experiment was performed at the sludge feed rate of 4t/h, 6t/h and without sludge. It was showed from that the use of sludge as alternative fuel did not affect clinker...

This study introduced a multi-criteria decision making TOPSIS method to identify the compromised groundwater remediation strategies in 10 and 20 years periods. Based on the PAT technology, the model is applied to a real-world area located in northeastern China where groundwater system has been contaminated...

In a photovoltaic (PV) system that consists of multiple series-connected PV modules with bypass diode, multiple peak points could exist in the P-V curve of the PV system under partially shaded conditions (PSC), causing conventional MPPT methods sometimes unable to track the true global maximum power...

Effects of batroxobin on progressive ischemic stroke (PIS) and serum MMP-2 and MMP-9 expressions in patients with PIS were investigated. 160 Hospitalized patients with acute progressive ischemic stroke were randomly divided into a treatment group (n=80) and a control group (n=80). Patients in the treatment...

The power system application of the infrared thermal imager is introduced in this article. By analyzing the special requirements of power system applications, several important performance parameters of the infrared thermal are summed up. This paper presents a more comprehensive calibration test method...

Forward osmosis (FO) process is a new membrane separation process that developed in recent years; it is driven by the osmosis pressure difference of solution on both sides of membrane. Forward osmosis process don’t need to force energy-driven extra, and the main energy consumption of the whole craft...

How to handle the relationship of environment and industrial coordination development and promote sustainable social and economic development is a hot topic in present social studies. This paper constructs sustainable development evaluation index system and establishes function of sustainable coordinated...

This paper aims to study on the impact of different of Mn2+ concentration on anammox to determine the perfect Mn2+ concentration to realize anammox. The experiment uses real life wastewater of Shenyang Jianzhu University under the condition of temperature at 35 , infusing argon to removal DO, controlling...

Soil erosion by water is a serious problem all over the world. In China, about 1790000 km2 of land suffers from water erosion, which accounts for 18.3% of China’s total area. Based on RS and GIS methods, this paper taking Miyun County as the study area, with 2011 rainfall data, Landsat TM images, ASTER...

The effects of diethylene triamine pentaacetic acid (DTPA) on cadmium (Cd) accumulation of hyperaccumulator Galinsoga parviflora were investigated through pot experiment. The results showed that the biomass, chlorophyll content of G. parviflora decreased with the increase of DTPA concentrations in the...

Step-feed nitrogen removal process, as a new sewage treatment technology, was concerned by scholars domestically and abroad in recent years. Three-phase biological fluidized bed with four step-feed process combined step-feed nitrogen removal with biological fluidized bed. In fact,there were many advantages,...

Quantitative research on the soil erosion intensity in the mountain areas of Beijing was estimated via utilizing RUSLE model supported by GIS and RS technology. It is concluded that no erosion and slight erosion were the primary erosion intensities in the mountain areas of Beijing. The soil erosion was...

This study models the evolution of technology innovation network. Results argue that the growth of hybrid rice innovation network fellows S-curve by time; the innovation network fits preferential attachment as amended aging Lognormal distributions. And it implies that the degree distribution of the technology...

A Pilot study on advanced treatment of wastewater produced by pressurized coarse coal gasification was done in a coal chemical plant. The feasibility of catalytic ozonation, UV/O3, and Fenton process in the advanced treatment of wastewater produced by pressurized coarse coal gasification process was...

The aim of the present research was to prepare an organic iron compound, Lycium barbarum polysaccharide iron complex (LBP-Fe), and evaluate its antioxidant abilities on scavenging super oxide radicals and DPPH radicals in vitro. LBP-Fe was prepared by chemically modification using chloride ferric and...

Considering the various experimental conditions, we carried on the study applying EM (Effective Micro-organisms) stock solution on polluted urban river water purification. Experimental results showed that EM technology on restoration of urban polluted water bodies had a more significant effect, the accumulated...

Due to the characteristics of the operation of the wind turbine and the capacity of the converter and the rotor current and other factors, the use of wind turbine to adjust the system frequency and voltage can not fully meet the requirements. And energy storage equipment has the advantages of flexible...

The diffusion behavior mechanical performance activation and biological property of gel-embedded nitrobacteria carrier LQ-1 were measured, and its application in the treatment of urban sewage was studied by pilot experiment. The results show that the interpenetrating holing-through structure (about 5...

Based on the field hydrology test, topographic map, remote sensing data and cross section survey data, the influence factors and the degree of the muddy tidal flat in Jiangsu coast area are studied, and the stability criterion for determining the stability of the three stages is established. The stability...

This paper gives a brief review ofthe development and utilization status of the renewable energy in China and explains the importance, urgency and feasibility of the development and utilization of the renewable energy regarding strategic choice for national adjustment of energy structure. The renewable...

This study sets double injections in the inlet of the flow field to study the new blunt body’s law of the flow patterns and the combustion efficiency under the condition of the two-phase flow. Compared with the vortex shedding mechanism of the V-gutter blunt, the computational results show that the vortex...

The application of Distributed Generation (DG) reduces the consumption of traditional energy, but it also brings certain challenge to relay protection because of its own characteristics. This paper analyzes that the injection or branching current will cause incorrect operation of over current protection....

This paper presents a new adaptive overcurrent protection for distribution network with high penetration rate DG. The equivalent impedance of DG is calculated by fault components during fault transient state, and works as the premise for protection configuration. The principle and the configuration method...

Based on the experimental research and numerical calculation of the Contra-Rotating Wind Turbine (CRWT) by using the technique of the aero-engine and propeller, the effect of the tip speed ratio of the rear stage on the performance of the contra-rotating wind turbine is studied by using numerical simulation...

According to the specific environmental noise of the detection system, via holes was caused impedance discontinuities, parasite capacity and inductance which resulted in signal reflection and attenuation, and hence deterioration of signal integrity(SI). The new idea was put in the paper, the specific...

Five aquatic macrophytes, Acorus calamus, Lythrum salicaria, Monochoria korsakowii Alisma orientale and Sagittaria sagittifolia were tested for the relative growth rate (RGR) and abilities of removing total phosphorus (TP) by the manipulative indoor experiment. A nutrient treatment consisted of two levels...

The design of Low-carbon Green Buildings emphasizes the application of eco-friendly strategies in buildings while paying close attention to their images, with the purpose of dealing with the relationship among buildings, environment and ecology, and realizing a benign cycle between factors of the artificial...

It was found that appropriately increase weight ratio as well as attention to control pH in sedimentation and reduction phases can enhance the treatment effect of chromium-containing wastewater and prevent hexavalent chromium content rebounding after processing.

According to the problem that uncertainty information is difficult to be merged during the decision process of multi-source irrigation information, a fusion method based on fuzzy rough sets and D-S evidence theory was proposed. Using the fuzzy rough set theory, the basic probability assignment function...

Phenol is the major organic compound of coking wastewater. It is of biochemical toxicity, difficult processing, difficulty to be degraded and high cost in the treatments. Microbial fuel cell (MFC) is a new type of fuel cell. It can produce electron in the process of metabolism of electricigens and export...

The idle time power consumption of universities has a significant impact on the total power consumption of universities. In the paper the power consumption problem is analyzed from the definition of the power consumption of idle time, idle time monitoring of power consumption and idle time factors influencing...

Fuel cell is attracted much attention as an efficient power, low-pollution means of generating electrical power. In this paper, the fuel cell power generation system problems are described in detail, and expounding on the principle of single battery, power system working principle, characteristics, and...

This paper investigates a design of a energy harvester that uses magnetic levitation to produce an oscillator with a appendage linear spring. The harmonic balance method is developed to analyze the frequency-amplitude response relationship. The numerical results show that the strength and bandwidth of...

Wetland is the richest ecosystem with diversified creatures and also is one of the most important living environments. As the irrational utilization and damage of wetland resource in recent years, wetland resource is experiencing a degenerative process. As a unique ecosystem that is different from lands...

Combined with the actual situation, this paper presents a program of optimizing substation control panel lighting- using LED bulbs. Using LED lighting not only saves energy, but also save the maintenance or replacement of lighting equipment required manpower costs. At the same time, it is very friendly...

Study of the methane-air explosion mechanism is of great important for the safety utilization of the coal bed methane and safety production of coal mine. The methane-air explosion reactions were numerical simulated in a closed spherical 20 dm3 vessel with the ignition electrode at the center. The simulation...

The construction of wind turbine generator set depends on the sufficient measurement of wind resources, and reasonable layout and management. Flat open terrain is the ideal condition for the operation of the wind turbine, but the actual terrain fluctuation is changeable. Because these terrains are close...

The six prism type Ce0.7La0.3O2- solid solution was prepared by reverse co-precipitation method with urea and Na2CO3 as double precipitant. The reverse method favored the washing of precipitate and formation of rod-like CL. Using urea as a homogeneous precipitating agent before precipitation with Na2CO3...

Electrical joint compound is widely used in metal connections of high-voltage electrical equipment. Based on studying a defect of electrical equipment connection fittings, the influence of electrical joint compound on the temperature rise of electrical equipment was studied according laboratory experiment...

To low transmission power loss, maintain voltage stability and improve voltage profile, a novel multi-agent-based voltage control scheme is proposed in this paper by dynamically adapt configuration of control devices, including the automatic voltage regulator of generator, transformer with under-load...