The one core content of Green mining technology is how to achieve coal mining under water-containing, which means implementing efficient exploitation of coal resources and protecting the valuable water resources in coal mining, and is the trends and requirements of the development in the coal mining...

Hydrothermal sulfide ore in submarine mineral resources is a hot topic recent ocean exploration. From the fundamental equations of electromagnetic field, this paper first puts forward the model of ; Then, Analytical solution of the simplified nonlinear diffusion - heat conduction model is given, which...

The hybrid energy storage is used to stabilize the wind fluctuations for intermittent generation and random of distributed generation system in DC micro network. The power of wind farm is analyzed by Fast Fourier transform (FFT) while the minimum hybrid energy storage compensation capacity is obtained...

For ill-posed linear bilevel programming problem, this paper studies how the leader motivate the follower to maximize its own profit. Firstly, we present a coordination model. Then, under some conditions, we establish two examples. Finally, numerical results show that the proposed method is feasible.

The slope zone in M Block is promising zone of lithologic reservoir exploration, whereas the exploration result is low expectation duo to the insufficient knowledge of reservoir forming conditions and controlling factors. In order to solve exploration problem, by using log and oil testing data, the reservoir...

A green transportation system contains that the layout of the community and urban functions should be driven by the industrial layout. A number of sub-centers are established on the basis of the industrial set with larger production relation in the city, so that reduce the flow of population and traffic....

using the VAR model, this paper builds the crude oil price fluctuation and economic growth of kazakhstan, monetary policy, price level, the unemployment rate and other variables and the static relationship between oil price fluctuations on the influence law of kazakhstan's important economic variables...

This paper presents a control strategy for wind turbines to enhance their fault ride-through capability. The controller design is based on pitch controlled variable speed wind turbine equipped with doubly-fed induction generator (DFIG). The fault ride-through is realized by injecting a crowbar with variable...

Industry is the main industry of water pollution.we should reduce the total amount of industrial water pollution to enhance the overall quality of the environment . Taking Jiangsu as an example, this paper analyzes the factors that affect the industrial water pollution by using the grey correlation analysis...

Using tool such as torque wrenches, air guns, speed sensors and bolt fastening analyzer, the causes of flywheel bolt fracture of ISG motor was analyzed, respectively from the fixed structure of hybrid bus, tightening performance of bolt and clutches shock characteristics. The results show that lack of...

The effects of exogenous melatonin on growth and physiological characteristics of Shepherd's-purse seedlings under salt Stress were studied by spraying 5 different concentrations of MT (0, 50, 100, 150, 200 mol-L-1) solution on leaves in Shepherd's-purse seedlings. The result showed that spraying MT...

To optimize the coalbed methane (CBM) horizontal well types in the southern Qinshui Basin, the optimization system of horizontal well types accompanied with corresponding engineering technology modes was established basing on the well type geology adaptability and key factors influencing the horizontal...

To evaluate the development effects systematically, the coalbed methane (CBM) production performance of 58 horizontal wells in the Fanzhuang block of the Qinshui Basin was tracked and correlations between the gas rate per 100 m and the influencing factors were discussed by single and multiple factor...

According to the atmospheric information collection system has its own characteristics, to design a collection for long uninterrupted data transmission packet intermittent, low-power wireless sensor networks, and can automatically identify low energy equipment, restructuring forwarding path to extend...

The safety of drinking water has a direct impact on human health. In this paper, indicators of organic matterin the water stayed overnight and the water flow in two of the most common kinds of pipe materials-galvanized steel and PPR are analyzed experimentally, which indicates that the concentrations...

Research on environmental cost calculation method for electricity production and benefit assessment method considering low-carbon energy saving, can promote the realization of low-carbon production in power industry. First, the measurement for environmental factors and costs were studied in the paper,...

In the current low-carbon economy, consciousness regarding environmental protection is rising worldwide, leading to increasingly stringent environmental regulations. China, the world's largest exporter, is undoubtedly affected, especially in transportation and communication facilities, which constitute...

Due to low efficiency, some water plant in Poyang cannot decrease raw water turbidity availably, which leads to blocking filter tank ,shortening backwash cycle and increasing capital. Aiming to those problems, this technical reform bases on micro-vortex flocculation technology, using vortex reactor in...

This paper developed a DC high voltage standard device (including the DC standard voltage divider and the synchronous data acquisition system) for the on-site calibration test of DC converter station. After selecting the appropriate circuit for on-site calibration test, this paper completed the on-site...

Applied principal components analysis(PCA) to assess the water quality of Tongjiyan River in 2014, based on monitoring data of 8 indicators, such as CODMn, NH3-N, DO, etc.. As PCA could not classify water samples according to their water quality, a PCA based water quality classification method, which...

Description of probability distribution characteristics of wind power ramp events is always a challenge in grid-connected wind power operation analysis. In this paper, a moving ratio based approach of wind power ramp events is introduced and an probability model is described for the wind ramp events....

The cadmium (Cd) accumulation characteristics of grape seedlings were investigated through a pot experiment. The results showed that with the increase of Cd concentrations, the root, stem, leaf and shoot biomasses of grape seedlings decreased, and the Cd contents in roots, stems, leaves and shoots of...

The purpose of this study is to recycle the heat of waste gas in printing plant. Several heat recovery equipments are presented and analyzed. After comparing, the heat-pipe heat recovery equipment is found as the most effective equipment for the organic exhaust gas on the basis of its temperature. The...

In the process of rollers transport the hot billets, if the roller's temperature is too high, the roller material will arouse thermal wear due to overheating, and reducing its mechanical properties. This paper analyzes the effects of different cooling water velocities on the cooling effect by Fluent....

Considering the particular physical geography and shipping status of the Strait, it is urgent to strengthen the management of maritime traffic, of which the establishment of PSSA and implementation of relevant management practices is an effective means for the prevention of marine accident and marine...

Fault-phase selection is an important link on corrective actions of high-voltage transmission lines protection, but also an important prerequisite for accurate fault location. The traditional fault phase selection method is only applicable to simple fault, low sensitivity, and easily affected by system...

Quotation strategy of power generation company is a new problem with the emergence of electric power market. The amount of a single transaction at least 1 million, more than 100 million in electricity market. The advantages and disadvantages of electricity generation quotation will decide enterprise's...

Based on the structure of traditional evaporative condenser, by analyzing the number of entropy generation units and the principle of heat transfer and mass transfer, through three ways to optimize and improve the evaporative condenser: nozzle spray upward, arrangement of double layer inorganic filler...

In this paper, in order to study on the influences of hydrogen-oxygen isotope values and phosphate content of soil water, rainfall and sewage infiltration process were simulated through the soil column experiment. Soil water samples were collected in situ, and the gravity flow samples were also collected....

Hydrogen sulfide is highly toxic and corrosive component of natural gas that must be removed before natural gas is used in industrial applications. Currently, absorption methods using aqueous solutions of methyl diethanolamine are most commonly employed to remove hydrogen sulfide from natural gas feedstocks....

Gas well bottom-hole flowing pressure is an important parameter in gas reservoir geological research and evaluation, reserves calculation, evaluation of capacity calculation and dynamic analysis. So, get accurate bottom-hole flowing pressure has significant importance to the production. Through the production...

This paper is to propose a practical method for two-step fault location of distribution network with incomplete measurement. In the first step, the Ant Colony Optimization Algorithm (ACO) which is applied for location in measurement areas is used to locate in the whole networks. In the second step, the...

For optimizing the maintenance strategy of electric vehicle (EV) changers, it's necessary to have a comprehensive evaluation for it by using its monitoring data. From the battery, electrical machinery transmission and charge-discharge process, 26 characteristic quantities are chosen as EV changers operation...

In this paper, the charging current harmonics of EV are analyzed based on the harmonically coupled admittance matrix of three-phase rectification charger. The harmonic current calculation formula of single and multiple EV chargers in the grid is derived, and subsequent a probability method to assess...

This paper is to propose a management method of distribution network's wide-area reactive power control with low voltage-violated buses. The concept of voltage-violated bus was proposed, and based on this concept, the distribution network's reactive power control with low voltage-violated buses was established....

In order to show their corporate social responsibility (CSR), Chinese enterprises start to publish CSR reports, however, the majority of these reports lack third-party audit and therefore are unable to be assured reliability. Using a sample of all Chinese manufacturing listed companies in the Stock ''A''...

The voltage problems in the DC voltage bus contains the voltage fluctuation, the voltage sag and the voltage interruption problems. In this paper, the wavelet module is established based on idea of wavelet transform. The voltage pollution source in the DC bus is identified by wavelet transform. In the...

Production technology of 12kv solid-sealed polar pole is mainly expounded, including mould installation, spares preparation, mix preparation, injection molding, after treatment, assembling, inspection, etc., with focus on spare preparation, mix preparation and injection molding.

In the new round of the electric power system reform, it makes full use of all kinds of supporting service resources, including demand side response and load optimization technology. Therefore, under the background of new electric power system reform and facing different power demand-side management...

The Mesozoic-Paleozoic marine strata in the South Yellow Sea Basin have been regarded as the new targets for hydrocarbon exploration. In order to carry out the oil and gas resource evaluation in the Mesozoic strata, the condition of the cap rocks and the combination of reservoirs and cap rocks should...

Vehicle semi-active suspension has been more and more widely used since it can provide good operation stability and ride comfort. This paper focuses on embedded system design based on Infineon C164CI microcontroller for vehicle semi-active suspension. The hardware design of electronic suspension control...

In recent years, the residential electricity load characteristic changes significantly. Especially in rural areas, the load is low at ordinary time, but the peak load rise sharply in Spring Festival. In response to this situation and to improve distribution transformer economical operation, adjustable...

The resistance performance of 49.5m tuna longline fishing vessel is simulated by using CFD software, the simulation results are in good agreements with experimental results, which verified the reliability of numerical calculation. Then change the bulbous bow three parameters of relative extend length,...

There are a large number of throats in tight sandstone reservoir, the throat morphology is various and the distribution of throat radius is wide. These characteristics have great influence on the permeability of the tight sandstone reservoir. However, it has not been well studied. In this paper, we address...

Transmission line icing is a serious threat to the security of power system. Risk evaluation for icing is the foundation of building ice disaster defense system and ensuring the safety of power system. In this paper, the index system of transmission line icing risk assessment was developed in consideration...

The relocation and resettlement project in Southern Shaanxi has a large scale and involves many aspects. This project brings new problems to the ecological environment of the region, such as lacking ecological planning and copying the pattern of urban residential district in the planning and construction...

The fly ash from municipal solid waste incineration (MSWI) is generally classified as hazardous material. Fly ash often contains large amounts of potentially toxic metals (e.g. Pb, Cd), which can cause harm to the environmental and human health if released from the ash. The leaching concentration of...

As an important part of urban green area, especially the parks in the city, the fluctuation of the water quality of water landscape has become the focus of urban ecological environment. Due to the rapid development of urbanization , urban hardened area ( such as roofing , paving roads , etc. ) continues...

In this paper, the steady state and transient model of the DFIG system are analyzed. It is concluded that the PI controller parameters and stator transient current are influenced by different parameters of the system, including resistance value, generator rotor inductance or sag magnitude of power grid...

Dyestuff industry, a traditional industry with high pollution and high energy consumption, is an important field implementing Cleaner Production (CP) in China. From the dimensions of technology, economy and environment, a domestic well-known dyestuff company has made an optimal selection of medium/ high...

The leaching of laterite containing high-magnesium content was investigated in this study. The results show that the acidity of the leach liquors from high pressure leaching of laterite containing high iron content is high enough for the leaching of high-magnesium laterite. After leaching at 70 C, 60min...

Separation of cobalt and nickel from sulfate solutions was studied, using the sodium hypochlorite solution as the oxidant of Co2+. The cobalt removal rate reached 98% while Ni2+ was hardly oxidized at 80 C, 1h, pH 2.3 and Co2+/ClO- molar ratio of 1:15. Solution pH and the amount of ClO- had more significant...

The trend of development index of oilfield which mainly is decided by two aspects: On the one hand, it depends on geologic condition. On the other hand, it depends on well pattern arrangement. In recent years, with well spacing density gradually adjusted and improved for Beierxi of Daqing oilfield, thus...

Aiming at the problems existing in Multi Agent Q learning algorithm in micro-grid control systems, this article put forward a Q-learning algorithm of Multi-agent in Micro-grid control system based on probability. This algorithm introduces the theory of probability into greedy strategy, so that the optimal...

An analytic calculation method about the air gap magnetic field of the high-speed permanent-magnet brushless DCmotor with ironless rotor is presented in this paper. Based on equivalent surfacecurrents method and image method, the mathematical model of the motor is presented. Then the analytical procession...

High ammonia wastewater, especially in the high chlorine wastewater, is difficult to treat in the field of wastewater treatment. Ammonia removal efficiency of porous iron carbon alloy filler in different factors and an in-depth research of NH3-N removal mechanism were studied in the paper. The experimental...

Faced with the international environmental pressure and transaction obstacles, Chinese government has enacted and implemented laws which contain the requirement of EPR (Extended Producer Responsibility) in manufacturing industry. However, the implementation effect is not ideal. Firstly, this paper explores...

This paper studies static synchronous compensator (STATCOM) accessed in the system via intermediate taps on transformer high voltage wingdings. For Dyn11 type transformers, the proposed circuit configuration of DT-STATCOM is analyzed, and the function of reactive power compensation is verified. Then,...

Two methods, including standard DC power flow model and the improved DC power flow model with iteration process are introduced in this paper for line loss calculation. A line loss calculation model is established based on these two DC power flow models. In order to investigate the accuracy of the DC...

Based on some characteristics of Carboniferous gas reservoir in eastern basin, such as the reservoir fluid inclusions, solid bitumen and so on, it is found that the gas reservoirs present a high content of methane (97%), a great quantity of solid bitumen in the Carboniferous reservoir, fluid inclusions...

Water Footprint, as a quantified indicator to evaluate environmental impact, is popular in both direct and indirect water use of a product or service as well as supply chain management optimization. Agriculture sector is the largest water resource consumer and corn seed is not only a kind of agricultural...

Soil salinization has become a global problem. This test used the method of spraying different concentrations (1, 5, 10, 20 mol-L-1) of ABA to lettuce leaves respectively, with spraying water as control, to discuss the effects of exogenous abscisic acid (ABA) on photosynthesis of lettuce under NaCl stress....

A pot experiment was conducted to study the effects of spraying melatonin(MT) on photosynthesis of lettuce seedlings under NaCl stress. The results showed that net photosynthetic rate(Pn), stomatal conductance(Gs), light use efficiency (LUE)and transpiration rate (Tr) were improved, especially when the...

A pot experiment was conducted to study the effects of photosynthesis of Chinese cabbage under NaCl stress, and different concentrations of abscisic acid (ABA) solution about 1, 5, 10 and 20 mol-L-1was sprayed, control was sprayed water on leaves. The results showed that spraying ABA could improve the...

A pot experiment was conducted to study the effects of photosynthesis of Chinese cabbage under AlCl3 stress, and different concentrations of abscisic acid (ABA) solution about 1, 5, 10 and 20 mol-L-1 were sprayed, control was sprayed water on leaves. The results showed that sprayed ABA could improve...

The discovery of the basic law in the subway network system is important to promote the coordinated development of traffic management science and traffic science and technology. Based on complex network theory, this paper constructs a weighted complex network model of passenger flow in Beijing subway...

Coal-based direct reduction followed by magnetic separation was used to produce direct reduction iron powder (DRIP) from a titanomagnetite (TTM) ore. The residual solid wastes which are called coal sludge in this paper are still discarded as waste in large quantities. To explore the feasibility of using...

Combined with the development of national and industrial standards on environmental pollution control, the paper puts an emphasis on building a scientific and reasonable standard system of third-party governance on environmental pollution based on the system theory and methodology of systems engineering....

This paper used 3# coal seam mining of Mengzhuang Coal Mine as an example and the FLAC3D software was used to analyze the reasonable fault coal pillar width leaving in high angle condition. The results show with the width reducing of coal pillar, the range of concentrate stress before the working face...

With the rapid development of offshore wind power industry, it is significant to improve the accuracy of offshore wind energy assessment. Sea surface roughness and atmospheric thermal stability are main factors that influence the offshore wind energy. But at present, most researches on micro-scale aerodynamic...

A modified anoxic/oxic (A/O) process was represented by coupling suspended-growth activated sludge and hydrocyclone, simply termed "AOH" process. The nitrate mixture liquid was firstly transported into hydrocyclone and then returned into the anoxic zone in AOH process. Sludge flocs were disrupted and...

Scientific performance evaluation is an important basis for government decision. This paper established the performance evaluation index system of electric power industry based on environmental technology, and then, SE-DEA model, entropy weight TOPSIS model and factor analysis model are used to calculate...

Based on the concept of national hectares, the traditional model of equilibrium factor and yield factor have been amended, and the deep analysis has been conducted about the per capita ecological footprint and ecological bearing and its changing trends of Hunan province from 2000 to 2011; And based on...

Low ambient temperature destroys of dry-type air ore reactors often occurred in recent years. In this paper, single encapsulation dual winding reactor models have been prepared. X-Ray inspection has been performed for inner damage examination after destroy by short-circuit under low- ambient electrifying....

This study proposes energy-saving indexes based on symbolic dynamic, applied to Efficiency Power Plants (EPP) of typical high energy consuming industries. Building the EPP by forming power saving plans of a given area or industry will optimizes power consumption way, economizes energy and reduces cost....

Light emitting diode( LED) is widely used because of its high efficiency, environmental protection, long life and so on. However, the use of LED is affected by the performance of the driving power supply, especially in the complex and poor working environment. Therefore, it is very important to improve...

With the rapid development of smart substation technology, people become more and more anxious about the security of smart substation technology as they can't get the concrete difference between smart substation and comprehensive automation substation in runnning status. In this paper, according to the...

A flat-plate type dielectric barrier discharge of micro-atomizer was studied based on Ansys software in this paper. And it was mainly studied the effect of the discharge characteristics on the different factors, such as the material and thickness of dielectric barrier, the discharge gap, the shape of...

The occurrence and distribution of major, trace and rare earth elements have been investigated in two coal-bearing units in the Qinshui Basin, northern China: the Carboniferous and Permian coals. The arithmetic means of concentrations for most elements in the Carboniferous and Permian coal samples, although...

With the development of electronic communications technology. Intelligent devices are widely used in electric power communication systems, smart substation gained rapid development. The intelligent electronic devices all use equivalent way to connect in smart substation, this way improved the interaction...

FT-IR spectroscopy provides a measurement for fuel dilution in engine lubricating oil. Quantitative analysis techniques such as peak height and peak area could be employed in the analysis program of FT-IR spectroscopy. The accuracy of peak height method and peak area method is compared.

Aim at the problem of on-site measuring mechanical equipment lubricating oil viscosity, the principle of Hele-Shaw flow is chosen to develop viscometer after comparing the characteristics of existing viscosity measuring instruments. Studying on the flowing characteristics of Hele-Shaw flow in the narrow...

The essential oil obtained by the hydrodistillation of the leaves of Patrinia scabiosaefolia Fisch and Patrinia villosa (Thunb.) Juss were analyzed by a combination of capillary GC-FID and GC/MS analytic techniques. 51 components comprising 94.56% of essential oil in leaves of P. scabiosaefolia Fisch...

Cinnamon essential oil microcapsule was developed. Microcapsule was prepared with cinnamon oil embedded -Cyclodextrin ( -CD). The influence of the ratio of core (Cinnamon essential oil) to wall ( -CD), temperature, reaction time and stirring speed on the embedding rate of cinnamon essential oil were...

In this article, we conceptualize technique effect from a carbon emission reduction perspective, informed by the work of MacDougall, Shahbaz, and Daron Acemoglu and others following them. Building on this, we classify these determinants of technique effect into two typologies. Foreign trade and foreign...

This paper summarizes the main findings regarding rural household energy consumption from 5130 households covering 171 counties in Hebei province. The results of the survey document behaviors of rural residents: the most commonly used fuel for heating is coal product (including honeycomb briquette and...

with the development of the global energy financial integration, the international energy market financialization trend increasingly highlighted.As China's energy consumption is rising year by year, external dependency of energy shortage in China's energy security and energy dependence become one of...

Harmonic problem is one of the main problems that restrict the development of grid connected photovoltaic (PV) power plant. In this paper, a passive network model of harmonic transmission is established with detailed consideration of the electricity collection system structure of PV power station based...

Using the independent -cultivated molecular biology method, By Next-generation DNA sequencing techniques , Gene sequences of microbial groups for water samples collected from River-lake ecotone of Poyang Lake. water samples were collected form River-lake ecotone of Poyang Lake to determine gene sequences...

Toxicity test can intuitively reflect the combined toxicity of contaminated water bodies, predict and control is a necessary adjunct to chemical pollution, and is widely used to test surface water and industrial wastewater. This paper describes the significance of the various types of biological and...

In September 6, 2016 during the G20 summit between China and Kazakhstan signed the Silk Road Economic Zone and the construction of the road of light new economic policy docking cooperative planning. This paper cleared that both sides should steadily promote productivity and investment cooperation, strengthen...

During operation, starting water separator's main stress is closely related to the stress of water wall outlets. Starting water separator suffers a long period of stress characterized as alternating stress and low frequency, which suggests that the loss is mainly in the form of fatigue. In order to analyze...

In this article, the study assessed ZnSO4-7H2O [Zn], Pb(NO3)2 [Pb], CdCl2-2.5H2O [Cd], and set the S.obliquus as biological indicators to study the toxicity of binary mixtures after 96h by trace analysis methods. The results showed that the relationship of toxicity among these compounds as follows: Cd>...

During the spring festival in 2013, a venlo greenhouse was collapsed due to the heavy snow hazard occurred in the south of Jiangsu, China. The general process of inspection and identification of lightweight steel structure greenhouse was introduced according to investigation and analysis of collapse...

During the spring festival in 2013, a venlo greenhouse was collapsed due to the heavy snow hazard occurred in the south of Jiangsu, China. The greenhouse was analyzed by application SAP2000 finite element software and the conclusion of identification was presented by the present code and specification....

It is useful to monitor forests by extracting parameters from LiDAR and aerial imagery. Reconstructing them can be challenging using only LiDAR because it is difficult to extract exact parameters. Therefore, using aerial images, we can obtain a digital surface model by matching, extract a digital terrain...

Natural ventilation has been an essential building technology for such a long time. As a significant role in the development of architecture design, the natural ventilation was replaced by the development of air conditioning technology for some time. However with the energy crisis and the greenhouse...

In the combination process of photovoltaic electric power generation with agriculture, there are many problems brought out, even in some important demonstration projects in Hainan island. In order to solve some of these problems, we detected and analyzed part of the plant growth factors in a typical...

Groundwater recharge using reclaimed water is considered a promising method to alleviate groundwater depletion. However, the pollutants in the reclaimed water would be recharged into groundwater during this process and pose risk to groundwater and human. In this study, 12 isomers of NP were detected...

In this paper, a composite communication network is designed to solve the problems of bandwidth bottleneck and high latency in chain-type wireless communication network for transmission line online monitoring. A theoretical planning model of optical fiber separation placement is formulated with object...