bluuebunny/crossref_metadata_2025 huggingface dataset:
Metrology of nerve-similar sensing systems in anthropomorphic robots and living organisms
Authors: Buymistriuk G Y
Published: November 2019

The features of metrological support of nerve-similar sensor measuring systems with the use of neural networks are considered. It is established that the metrological verification of such measuring systems, by analogy with living organisms, is possible by comparing their responses, invariant to the external unstable environment. It is shown that from the standpoint of classical metrology, instrumental, methodical, static, dynamic, systematic and random errors of nerve-like sensory measurement systems with neural network results are reduced to two types – methodical and systematic errors of neural network training. It is proved that without using of reference calibration tools for embedded sensors, it is possible to experimentally evaluate systematic and random errors in the presence of several similar measurement systems by multiple pairwise comparisons of their responses, and the obtained systematic error can be introduced in the form of a metrological correction in the results of responses.
Measuring for management in science, technology, engineering, and mathematics learning ecosystems
Authors: Morrison J , Fisher Jr W P
Published: November 2019

Rapid global expansion of multi-stakeholder ecosystems for learning in Science, Technology, Engineering, and Mathematics (STEM) demand close attention to the information infrastructure needed for sharing best practices and improving outcomes. The existing conceptual model of ecosystem development and elements needs to be translated into a metrological measurement model tailored to ecosystem management. An evaluation tool not designed from measurement principles included 38 questions applied across three years. An initial review of the instrument conducted before data were made available found multiple ambiguous items and rating categories requiring respondents to summarize diverse aspects of their experience in a single rating, with no capacity to reconstruct which aspects were included by any given respondent. Response data from 36 ecosystems in 2016, 38 in 2017, and 110 in 2018 produced more uncertainty than expected given the numbers of items, rating scale categories, and responses. No common factor structures across items could be identified. Stated expectations already on the record concerning STEM ecosystem development characteristics and focal partners, attributes, and goal areas provide a basis for an instrument redesign likely to result in meaningful measures advancing a theory of action fit for the purpose of STEM learning ecosystem management.
Advances in modelling visual symptoms and visual skills
Authors: Powers M K , Fisher W P
Published: November 2019

Though it seems to be a natural process of physical development, not everyone learns on their own how to use their eyes effectively. Poor binocular vision skills negatively impact a wide range of daily life activities, including reading. This study extends previous work using existing data in multidimensional causal Rasch models of vision. Optometry, survey, and reading assessment data are evaluated in a common frame of reference. Thirty-three students performed vergence and tracking exercises in about 12 to 38 sessions each involving a sequence of five computerized training modules. The number of training modules experienced in any given session ranged from one to five. There were 4, 064 total measured cases, with about 123 measures per student. Paired comparison t-tests of early and late measures show significant gains in vision quality. Two regression models predict reading scores on the basis of vision data. Results support further study of how training in Functional Binocular Vision might contribute to improved outcomes in reading education.
Accelerating the realization of the United Nations Sustainable Development Goals through metrological multi-stakeholder interoperability
Authors: Lips da Cruz A , Fisher Jr W P , Pendrill L , Felin A
Published: November 2019

The timeline for the fulfilment of the United Nations Sustainable Development Goals (SDG) diverse stakeholder interests can be accelerated many times over by creating incentives and rewards aligning individual and corporate self-interests with the greater good. The SDGs have been criticized for setting out ambitious goals with no accountability or enforcement mechanisms and little in the way of incentives or rewards past recognition for contributing to a better future. There is then an urgent and increasing need for quality assured sustainability and economic measurements capable of efficiently coordinating and aligning decision-making across investors, financial markets and governments, the private and public sectors, and institutions. Metrology is key to making the 17 UN SDGs measureable and manageable collectively by individuals globally, in accordance with the 169 targets. This massive global effort will require aligning metrological unit standards for the sustainability targets with financial values and economic key ratios, legally binding property (material and immaterial) rights, accounting standards, management practices incorporating new performance indicators and new standards in sustainable economic models. Just as the profit motive and individual and corporate priorities worked to create a new middle class over the last 200 years, so might they also be harnessed and channelled to create universally accessible opportunities for new ways of generating both financial and authentic wealth. The bottom line is that we liberate the power of common targets, language, and understanding with sustainable categorical standards to support adaptations to local situations in the context of traceability to universal standards.
Raman and CRDS isotopic resolution spectroscopy for biomedicine applications
Authors: Grishkanich Aleksandr , Chubchenko Yan , Kustikova Marina , Zhevlakov Aleksandr , Konopelko Leonid , Lunev Andrey , Noskova Irina , Paklinov Nikita
Published: November 2019

SRS-sensor was developed for measuring absolute amount ratios of 13C/12C isotopes for medical application. Measuring absolute amount ratios of 13C/12C isotopes allows detection of Helicobacter pylori for medical diagnostics of human health. SRS method is used to measure the amount of carbon dioxide isotopes in exhaled air to detect Helicobacter pylori. This is used to determine influence of the bacterium on the occurrence of gastritis, gastric and duodenal ulcers. This paper includes methods and metrological characteristics for measuring isotopes ratios.
Combinatorial characterization of inrankings as weak orders induced by intervals
Authors: Muravyov S V , Emelyanova E Y
Published: November 2019

The problem of reliable processing of heteroscedastic interval data occupies an important niche among urgent topics of measurement science. The paper is devoted to a combinatorial characterization of so called ‘inrankings’ which are weak orders induced by input intervals of the interval fusion with preference aggregation (IF&PA) procedure. The procedure transforms the given m initial real line intervals into inrankings, which are a specific case of weak order relations (or rankings) over a set of n discrete values belonging to these intervals. The new notation of inranking appears as a result of restrictions imposed on the ordinary rankings by interval character of the initial data. In the paper, the inranking spaces properties are investigated from the combinatorial theory point of view. It is shown that the inranking space is a subset of the set of all weak orders with a single symbol of strict order. The cardinality of inranking space is defined by the triangle number for the given number n of the discrete elements. Cardinalities of other adjacent spaces are considered.
Assessment of the generic problem-solving construct across different contexts
Authors: Nguyen A K L , Nguyen C T K , Adams R J
Published: November 2019

Problem-solving, one of the generic skills in the so-called ‘21stcentury’ skillset, has been found to be critical to the personal and professional success of learners. This study evaluates the existence of conceptual meaning of students’ generic problem-solving (GPS) competency in three distinct contexts, namely mathematics, reading, and creative problem-solving using the PISA Computer-Based Assessments (CBA) 2012 data. The analyses were framed in the context of a content validity exploration from Messick’s validation framework to reveal the GPS conceptual meaning underlying PISA CBA 2012 measurements. Specific tasks carried out include: (a) conducting skill auditing of PISA CBA 2012 items to understand their measured skill content and relevant to and representative of the generic problem-solving construct’s level; (b) using the outcome of the skill auditing stage to interpret the GPS competency levels measured by the domain-specific subject tests before comparing them with corresponding levels together.
Legal metrological verification in health area in Brazil
Authors: Soratto A N , Nunes L L , Cassol G
Published: November 2019

Presents the method used by Inmetro to measure the coverage of periodic metrological verification of sphygmomanometry and clinical scales in Brazil in 2018. It was used the Metrological Verification Coverage Ratio, that represents the percentage of healthcare facilities that received the periodic metrological verification service on the total number of healthcare facilities in the country. The results reveal great opportunity for growth of the instrument verification in several sectors, helps to size of the workforce and provides strategic information for the planning and execution of mandatory metrological verification in Brazil.
Methods to ensure the reliability of measurements in the age of Industry 4.0
Authors: Budylina E A , Danilov A A
Published: November 2019

The methods of increasing the reliability of measurement results based on the use of structural redundancy in the implementation of measuring instruments and multidimensional models, calibration of measuring instruments (including remote) and methods of processing large arrays of measurement results are considered. It is noted that these methods will be demanded by mass production in the age of Industry 4.0.
Measuring systems designed for working with living organisms as biosensors. Features of their metrological maintenance
Authors: Lyubimtsev V A , Kholodkevich S V , Druzhinin I I
Published: November 2019

The paper deals with the use of living organisms as biosensors for integrated assessing of the quality of their habitat. In particular, the paper considers the application of fish, shellfish, and crayfish for the water quality evaluation. By the example of a measuring system with crayfish, the features of metrological maintenance of systems with biosensors are described.
Plasma effective charge diagnostics at the Globus-M2 tokamak
Authors: Tukhmeneva E A , Tolstyakov S Yu , Kurskiev G S , Gusev V K , Minaev V B , Petrov Yu V , Sakharov N V , Telnova A Yu , Bakharev N N , Shegolev P B , Kiselev E O
Published: November 2019

The conventional method for determining the effective ion charge Zeff
is based on measurements of the bremsstrahlung intensity in the spectral regions free from line radiation. This paper describes the design of the Zeff
diagnostics at the Globus-M tokamak as well as the results of the first measurements. With allowance for the emission intensity estimates, the geometry of the experiment was chosen; the filter monochromators for recording bremsstrahlung were designed and manufactured. Using the Thomson scattering data on T

e
(R) and n

e
(R) profiles, time dependences Zeff
(t) were obtained in several shots of the Globus-M tokamak. The results of simulations Z

eff
performed using the ASTRA transport code are consistent with these measurements.
Limiting efficiency of fusion neutron source based on deuterium plasma
Authors: Chirkov A Yu , Fedyunin D E , Egorov K S
Published: November 2019

The estimates of the parameters needed for realization of a fusion neutron source based on deuterium plasma are presented. Requirements to the magnetic trap are discussed with reference to the proposed concept. The efficiency of the power plant is considered with allowance for the conversion of thermal energy.
Parameters of electron component in a pulsating discharge in a supersonic airflow
Authors: Shibkova L.V , Shibkov V.M , Logunov A.A , Andrienko A.A , Kornev K.N , Dolbnya D.S
Published: November 2019

The plasma parameters of an unsteady pulsating transverse-longitudinal discharge created in subsonic and supersonic air flows are determined. It was shown that in the anode part of the plasma loop, the longitudinal electric field, as well as the electron density and temperature exceed the corresponding values in the cathode part of the loop. The effect of gas flow rate and discharge current on the temperature of electrons in plasma of a pulsating discharge in air and propane-air mixture is also shown.
Boundary layer and the structure
Authors: Pyatnitsky L N
Published: November 2019

L.D. Landau’s analysis showed, the plane harmonic wave used in the small perturbation method is inapplicable as the turbulent disturbance motion form. The search for the movement form carried out in accordance with the considerations of H. Lorentz, led to replace the longitudinal wave with a spherical wave layer arising on the wall as a result of friction. This form of disturbing motion formed the basis of the turbulence wave model which reproduced the space-time field of the flow parameter pulsations. In this paper, the model is applied to describe the formation of the structure of the boundary layer and of the viscous sublayer.
Ignition of gaseous and liquid hydrocarbon fuel in supersonic flow by means of plasma generator
Authors: Yarantsev D A , Firsov A A , Dolgov E V , Savelkin K V , Talyzin V A , Nikolaev A A , Voloshenko O V
Published: November 2019

The paper describes experimental research of the surface electrical discharge influence on the ignition and combustion of the gaseous and liquid hydrocarbon fuel in supersonic airflow without mechanical flameholders. Electrodes of plasma generator are integrated with injectors of gaseous fuel. Tests were carried out on the experimental setup T131B in TsAGI. Diagnostics includes schlieren visualization, measurements of pressure distribution and discharge voltage/current. It is shown that new scheme of plasma generation and pilot fuel injection is rather effective and provides ignition of liquid hydrocarbon fuel in hot supersonic airflow (T
0=750 K) and ethylene ignition in cold (T
0=300 K) supersonic airflow.
Numerical and experimental modelling of MHD interactions at hypersonic flow around blunted body
Authors: Korotaeva T.A , Fomichev V.P. , Yadrenkin M.A. , Shipko E.K.
Published: November 2019

The problem of the reducing heat fluxes to the surface of the re-entry capsules when they enter the dense layers of the atmosphere remains an urgent challenge. The purpose of the numerical and experimental study presented in this paper is to check the possibility to decelerate the descent vehicles and reduce the thermal load on their surface in the upper atmosphere using the magnetohydrodynamic (MHD) method. The problem of the flow around a blunt body with a hypersonic air flow (M = 6) is considered when a local MHD interaction is realized near a stagnation point. An experimental study has been carried out at the MHD test rig. The test rig is designed to study the fundamental and applied problems of magnetoplasma aerodynamics. At the experimental simulation the free-flow ionization has been implemented using an electric high-voltage discharge, as distinct from the natural conditions when thermal ionization takes place behind shock waves at the flow hypersonic speeds. Numerical simulation of the flow around a blunt body has been carried out in the framework of Navier-Stokes equation with an approximate specification of the sources of force and heat in the region of MHD interaction. The flow parameters have been defined based on the results of the analysis of experimental data. The Stuart number has been obtained in all experiments that made it possible to establish a correlation between the calculated and experimental data. As a result of the studies, the possibility of changing the flow pattern around the model, the motion of the bow shock wave towards the free flow, and the heat fluxes decrease to the body surface have been demonstrated. It has been shown that, as a result of MHD interaction, the pressure and heat flux decrease about 2 times in the vicinity of the stagnation point where recirculated gas flows occur.
Study of the ionizing gas flow in the channel of plasma accelerator with different ways of gas inflow at the inlet
Authors: Kozlov A N , Klimov N S , Konovalov V S , Podkovyrov V L , Urlova R V
Published: November 2019

Numerical studies of the ionization process are presented for various ways of the gas supplying at the inlet of the coaxial channel of the quasi-stationary plasma accelerator. Simulation of two-dimensional axisymmetric flows of ionizing gas was carried out on the basis of the equations of radiation magnetic gas dynamics taking into account radiation transport. The approximation of local thermodynamic equilibrium in three-component medium consisting of atoms, ions, and electrons was used in the MHD model. It was determined that non-uniform gas inflow at the channel inlet leads to even greater instability of the pulsating unsteady flows of the ionizing gas in the plasma accelerator. The method of long characteristics was used in the 3D model of radiation transport, including the basic mechanisms of emission and absorption for different portions of the spectrum. The radiation field in the ionizing gas flow was determined, including the integral radiation characteristics and the spectral radiation intensities in the narrow ranges of frequencies or photon energies.
Kinematics, dynamics and energy balance of electric arc in a magnetic field
Authors: Bityurin V A , Bocharov A N , Moralev I A , Kuznetsova T N
Published: November 2019

Electric arcs (EA) are widely used in various applications as a high-density energy source, providing heating of the environment to temperatures of several thousand degrees. The presence of an external magnetic field perpendicular to the arc current vector causes a ponderomotive force normal to the plane of the electric current and magnetic field vectors. Thus, in addition to the thermal effect, there is also a dynamic one. It is these properties that motivate the use of EA as an MHD actuator to control the flow characteristics of gaseous working bodies in various technological processes. MHD actuator is most often considered as a control element (1) in combustion processes to intensify the mixing of fuel-air mixtures and maintain combustion due to the volume and constant high-temperature energy supply and (2) to control the characteristics of the boundary layer in the flow of the working surfaces of the devices. In both cases, the key issue is the efficiency of mixing (relative displacement of neighbouring elements of the medium). Within the framework of the standard “Eulerian” description of the gas-dynamic fields evolution in the laboratory reference frame, the movements of individual elements of the medium are not explicitly available. In this regard, this work is focused on the trajectories analysis of the individual mass elements exposed to the MHD of the actuator.
Spatial trends in the nitrogen budget of the African agro-food system over the past five decades
Authors: Elrys Ahmed S , Abdel-Fattah Mohamed K , Raza Sajjad , Chen Zhujun , Zhou Jianbin
Published: November 2019

Low nitrogen (N) fertilization is a dominant cause of malnutrition in Africa, but the spatial and temporal variability of N cycling patterns in Africa remain unclear. This study is the first to perform a detailed analysis of the N cycling patterns of 52 African countries from 1961 to 2016. We calculated the N use efficiency (NUE) in crop production, country-specific N fertilization trends, and the impacts of N fertilization on human protein demand and the environment. Over the past five decades, total N input to African croplands increased from 20 to 35 kg N ha−1 yr−1, while the application of synthetic N fertilizers (SNF) increased from 4.0 to 15 kg N ha−1 yr−1. N contributions from animal manure and biological N fixation remained lower than 10 kg N ha−1 yr−1 and 20 kg N ha−1 yr−1, respectively. The total N crop production increased from 15 to 22 kg N ha−1 yr−1 from 1961 to 2016. Total N surplus in Africa increased from 5 to 13 kg N ha−1 yr−1, while estimated gaseous losses increased from 4.0 to 11 kg N ha−1 yr−1. However, NUE declined from 74% to 63% during the past five decades, and protein consumption increased from 2.99 to 3.78 kg N capita−1 yr−1. These results suggest that Africa suffers from extremely low N input and that N loss is increasing in agricultural land. We recommend the implementation of an effective N management strategy incorporating the use of locally available organic material along with the balanced application of SNF. Such measures will require effective policy development and cooperation between all stakeholders.
Quantum Fisher information matrix and multiparameter estimation
Authors: Liu Jing , Yuan Haidong , Lu Xiao-Ming , Wang Xiaoguang
Published: November 2019

Quantum Fisher information matrix (QFIM) is a core concept in theoretical quantum metrology due to the significant importance of quantum Cramér–Rao bound in quantum parameter estimation. However, studies in recent years have revealed wide connections between QFIM and other aspects of quantum mechanics, including quantum thermodynamics, quantum phase transition, entanglement witness, quantum speed limit and non-Markovianity. These connections indicate that QFIM is more than a concept in quantum metrology, but rather a fundamental quantity in quantum mechanics. In this paper, we summarize the properties and existing calculation techniques of QFIM for various cases, and review the development of QFIM in some aspects of quantum mechanics apart from quantum metrology. On the other hand, as the main application of QFIM, the second part of this paper reviews the quantum multiparameter Cramér–Rao bound, its attainability condition and the associated optimal measurements. Moreover, recent developments in a few typical scenarios of quantum multiparameter estimation and the quantum advantages are also thoroughly discussed in this part.
Location Selection and Control Technology of New Driving Roadway in Upward Mining Roof
Authors: Liu Cong , Li Jie , Liu Zhennan , Qiu Pengrui , Cheng Yong , Wang Xu
Published: November 2019

Based on the engineering background of the belt conveyance roadway in the north wing of Zhuxianzhuang Coal Mine, this paper puts forward and analyses the existing problems in the optimization of the roof roadway location in upstream mining, and studies the movement law of overlying strata under different mining heights by FLAC3D numerical analysis software. On this basis, the orthogonal test is used to analyze the optimization of different location of roadway in overlying strata, determine the weights of three factors affecting the selection of roadway location, and put forward a reasonable roadway location for belt conveyance roadway in the north wing of Zhuxianzhuang Mine. According to the occurrence and use of surrounding rock of belt conveyance roadway in North Wing of Zhuxianzhuang Mine, two schemes of zonal support are put forward. Industrial test shows that the support effect is greatly strengthened and the support condition is improved, which can be used as a reference for the location selection of coal mine roadway and surrounding rock control under similar geological conditions.
Research on Technology of Drilling in High Temperature and High Pressure Gas Field in South China Sea
Authors: Huang Yi , Luo Ming , Zhang Zhenxiang , Li Wentuo , Zhang Yichi
Published: November 2019

The HTHP (high temperature and high pressure) areas of the Ying-qiong Basin in south China Sea has the characteristics of high temperature, high pressure, many pressure steps and narrow safety density window. The severe geological conditions pose a serious challenge to safe drilling in HTHP environment. Through more than 20 years of technical research and field practice. A set of key drilling technologies suitable for HTHP areas in south China Sea have been formed, including: multi-genesis formation pressure prediction, HTHP drilling fluid system, safe cementing technology, ECD accurate prediction technology, and drilling speed increasing technology. The engineering practice of safe drilling in the HTHP area of the South China Sea improves the efficiency of operation and ensures safe drilling. At the same time, the key technology also provides guidance for offshore drilling in HTHP areas.
Study on Uranium Minerals and Metallogenic Material Sources of Huayang Chuan Uranium Polymetallic Deposit
Authors: Wang Dequan , Wang Jianguo , Wang Yizhong
Published: November 2019

Huayangchuan uranium polymetallic deposit is located in Huaxian County, Huayin City, Shaanxi Province.The geotectonic location belongs to the Xiaoqinling intracontinental orogenic belt on the southern margin of the North China block.Uranium ore bodies are layered, vein-like and thick reticulated veins.The average content of uranium is 2×10−4 in the deposit.Through microscopic identification and electron probe analysis, we believe that uranium minerals are mainly betafite, crystalline uranium and uranothorite.According to the characteristics of rare earth elements in uranium ores, we believe that the ore-forming materials mainly come from the mantle.
Preliminary Study on the Clearance Mechanism of Nitrogen and Phosphorus Polluted Water by Iris -- Taking the Shichuan River as Example
Authors: Ye Shenglan , Wang Huanyuan , Liu Hongying , Niu Yan
Published: November 2019

The hydroponic study was used to research the effect of the iris on the removal of N and P in water, and the change of nitrogen and phosphorus in plants. The results showed that at the end of the experiment, J2 (N2P1) treated the height of the plant with the largest height of 81.1 cm; followed by J9 (N3P2) treatment, which was 75.0 cm. The J9 treated iris has the highest nitrogen content of 0.731%. And with the increase of nitrogen dosage, the nitrogen content of the leaves increased. The amount of phosphorus in the dry matter of the iris leaves ranged from 0.311% to 0.501%. The clearance rates of the three different concentrations of N were 63.5%, 67.5% and 70.2%, respectively. The clearance rates of three concentrations of P were 43.0%, 52.9% and 62.1%. When the test was carried out for 14 days, the NH4
+-N elimination rate reached 79.0%; the NH4
+-N clearance rate of J9 reached 81.0%, which was significantly higher than other treatments. At the end of the experiment, the elimination rate of NO3
−-N in water reached 16.4%, and J9 was the highest, reaching 27.4%, which was significantly higher than other treatments. According to the comprehensive analysis, the iris of J9 grew well, and the effect of purifying nitrogen and phosphorus was better.
Gas Drainage Technology in Goaf with Large Diameter and High Rock Trend Drilling
Authors: Zhang Jufeng , Zheng Chao , Xu Tai , Yang Fengfeng , Miao Zaiquan , Zhang Jianjiang
Published: November 2019

Taking 1302 fully mechanized caving face of Weijiadi Coal Mine as the research object, aiming at the characteristics of large gas emission and frequent gas exceeding limit during mining, this paper analyzed the difficult problems of gas control in working face, determined the theoretical height of caving zone and fissure zone of working face according to the gas cascade control mode formulated by Weijiadi Coal Mine and the principle of pressure relief gas, and inspected the “three zones”. The reasonable horizon and arrangement of drilling holes along the strike of large diameter and high position rocks are determined. The field practice results show that the gas extraction technology of large diameter and high rock trending borehole has good extraction effect, the maximum gas concentration is 26.5% and the maximum gas extraction volume is 14000 m3. It effectively solves the problem of return air flow and upper corner gas exceeding the limit. The gas concentration of return air flow is basically kept at 0.2%∼0.25%, which ensures the safety of mine production.
Study on Dynamic Load of Surrounding Rock Failure Based on Finite Element COMSOL Numerical
Authors: Xie Chengyu , Lu Hao , Cao Jie , Chao Lei , Jia Nan
Published: November 2019

In the stope or other blasting excavation process, it is difficult to directly analyze the stress change process of the shock wave generated by the blast in the rock, and the change of the shock wave is very important for the selection of the explosive parameters and the analysis of the excavation process. . Taking a mining blasting as the actual background, according to the parameters of rock parameters, using COMSOL Metaphysics simulation software, the transient force variation model of blasting rock was constructed with and without reflection boundary conditions, and the transient change at 1600ms interval was used. The force law of blasting waves in rock is analyzed. In the simulation numerical analysis, the time when the pressure wave reaches the surface is the same as the time when the reflected pressure wave reaches the sampling point under the condition of using the reflection boundary. In the early stage of elastic wave propagation, the stress change of the block first rises first. After reaching the peak value, it falls below the original stress and then slowly rises again. Then the two responses caused by the reflected wave begin to deviate from each other. The simulation results can provide reference and technical support for controlling the damage of surrounding rock under blasting impact.
Research on Fracture Prediction of Permian Volcanic Reservoirs of Jiamuhe Formation in Jinlong-2 Well Field
Authors: Jiang Qingping , Xiao Yang , Chen Dongliang , Li Sheng , Ji Dongchao
Published: November 2019

The practice of volcanic reservoirs exploration and exploitation for years shows that fractures are not only important factors in controlling hydrocarbon migration and enrichment, but also favorable conditions for efficient exploitation. This study used drilling data, seismic data and laboratory analysis data to clarify fracture characteristics and distribution of volcanic reservoirs. in study area. The fracture characteristics were predicted by using post-stack structure-oriented coherence and ant tracking methods with the result of various fracture developmental degree of different zones on the plane. Comparative analysis of drilling data, geostress and imaging logging interpretation results have obtained preferable prediction results, which is of great significance for effective exploration and exploitation of volcanic reservoirs.
Study on Preparation and Stability of Ginger Oil o/w microemulsion
Authors: Yang Shuai , Liang Bo , Du Ye , Zhang Peng , Ma Haozhe , Liu Jiaqi
Published: November 2019

In order to enhance the stability of ginger oil emulsions, ultrasound-assisted emulsification method was used for the preparation of ginger oil emulsions in this paper. The optimization was based on single factor and response surface optimization experiments. Four main factors in the preparation process (amount of emulsifier, ultrasonic power, time and temperature) were investigated. According to the visual analyses of the result, the optimum condition was obtained. Based on the optimal condition in the response surface optimization experiments, the preparation process was then conducted under ultrasonic emulsification. (The effects of ultrasound amplitude and irradiation time on the encapsulation process were also studied). The microemulsion type, grain size, and phase transition temperature were used to characterize the resulting sample. Finally, the average particle size of ginger oil nano-emulsion attained 94.49 nm in the condition of ultrasonic power 250W, ultrasonic time 5.8 min, ultrasonic temperature 50 °C, emulsifier concentration of 1.0 g / 10 ml, implying that the ultrasonic emulsification technology can solve the difficulty of macromolecular oil microemulsion preparation.
Research and Application of Cable Controlled Layered Water Injection Technology in Daqing Oilfield
Authors: Du Guitao
Published: November 2019

Daqing Oilfield has entered the development stage of high water cut later stage, the contradiction between inter layers and interior layers is more prominent, the rate of water injection pass rate decreases rapidly, the manual test workload is huge, the existing test team can not meet the requirements; at the same time, the existing high-efficiency measurement and adjustment technology cannot provide Continuous monitoring data and real-time dynamic adjustment of downhole injection volume, for this purpose, Daqing Oilfield carried out research and research on cable-controlled intelligent layered water injection technology. The technology is mainly composed of two parts: underground cable-controlled intelligent water injection technology pipe column and ground wireless remote control system. It can realize real-time monitoring and control of underground stratified flow and pressure in the office, realize online inspection, automatic measurement and adjustment, and report output. With the function, 30 wells were tested in the field and achieved good results. This technology is a continuous, efficient and real-time new generation water injection technology.
Stability Analysis of Slope of Saline Soil Subgrade in Gravel Block Based on SLIDE
Authors: Zhang Yagang , Zhang Yang , Qu Zhenpeng , Yang Lixia
Published: November 2019

The saline soil roadbed in the cold region is affected by salt crystallization and migration, and the soil strength parameters change significantly. In order to determine the influence of salt migration on the stability of the roadbed under the conditions of laying gravel barriers of different thickness in the saline soil roadbed in cold regions. First, determine the type and physical parameters of saline soil in cold regions. Secondly, for the saline soil roadbed with different thickness of gravel partition in the base of the road, the slope software is used to analyze the stability of the subgrade slope, and the stability of the gravel partition is obtained. The effect of slope stability. The results show that when the gravel partition layer is set at the base of the road, the overall stability of the subgrade slope decreases with the increase of the thickness of the partition. When the thickness of the partition is more than 20cm, the dangerous sliding surface is transferred to the surface of the slope partition. The thickness of the partition layer increases, and the dangerous sliding surface remains stable, which provides reference data for the design of the saline soil roadbed in the cold region.
Application of Synchrosqueezed Wavelet Transform in Microseismic Monitoring of Mines
Authors: Shi Yaqian , Zhang Da , Ji Hu , Dai Rui
Published: November 2019

Microseismic monitoring technique is an important means of ground pressure monitoring to ensure safe, high-efficient and sustainable development of mines. Microseismic data obtained by sensors in mines are easily influenced by non-stationary noises with a wide frequency band, resulting in the lack of available high-quality data for microseismic monitoring. Instead of traditional analysis in frequency domain, this paper introduces a new method, synchrosqueezed wavelet transform (SSWT), which provides a way to decompose data into time domain and frequency domain simultaneously. With higher time-frequency resolution of SSWT spectrum, purer microseismic signals can be extracted from raw data. Besides, two wavelet bases, Morlet wavelet and bump wavelet, are compared to match the microseismic signal in this paper. Two field data with different signal-noise rate (SNR) are used to show the application of the algorithm in the mine industry. The results of data graphical filtering method show that the SSWT has great practical value to extract the microseismic signal from raw data and improves SNR of signals effectively than traditional methods.
Stability Analysis of Slopes on Both Sides of Highway in Geotechnical Area under Rainfall Conditions
Authors: Zhang Yanqi , Ding Jiajia
Published: November 2019

The objective of this study is to correctly analyze the slope stability, strengthen the guidance of engineering construction, and ensure the safety of people’s lives and property. In this study, the numerical simulation software Geo-Studio is used to simulate the stability variation rules of the slope on both sides of the highway in the rocky region when the angles of the upper and lower slope of the platform width are changed under the action of light rain for a long time respectively, and the corresponding comparison analysis is made with the corresponding natural working condition. The results show that the infiltration of rainwater has a great influence on the slope on both sides of the highway in the geotechnical area, which is mainly reflected in the decrease of the stability of the multi-level slope, the significant change of the sliding surface (including the location, size, shape, etc. of the sliding surface), the potential instability form of the slope (overall stability and local stability), and the slow but continuous change of the pore water pressure in the soil. Through the rainfall test on the highway slope, it is found that the instability mechanism of the slopes on both sides of the highway in the geotechnical area is affected by the conditions of rainfall intensity, rainfall duration, cumulative rainfall capacity, and rainfall patterns. In addition, the changes of rainfall infiltration rate in the side slope of highway in rock and soil area and the migration rules of water field in side slope are also obtained. The findings of this study can be used as a reference and basis for engineering design and construction. Moreover, the safety coefficient of the slope after renovation meets the stability requirement. Therefore, the slope engineering treatment measures on both sides of the highway can effectively deal with the hidden disaster brought by landslide deformation or instability.
Study on the release of carbon, nitrogen and phosphorus from the decomposition of aquatic plants
Authors: Xiong Hanfeng
Published: November 2019

It is important to study the decomposition process and nutrient dynamics of aquatic plants in order to understand the material circulation process of water ecosystem. The decomposition and release of carbon, nitrogen and phosphorus from aquatic plants at different temperatures were studied by indoor plant decomposition simulation test. The results show that temperature has obvious effect on the decomposition process of aquatic weeds. High temperature is obviously beneficial to the release of carbon, nitrogen and phosphorus. With the increase of temperature, the amount of carbon, nitrogen and phosphorus released into the water increased. The decomposition rate decreases with time.
Comprehensive adjustment method and effect of the second stage oil layer flooding in the west block of a certain area
Authors: Wang Wenqiu
Published: November 2019

In the later stage of water flooding and subsequent water flooding, due to the long mining time, the proportion of oil production in the stage is relatively large. Therefore, the comprehensive adjustment in the later stage of polymer flooding plays an important role in the development of the whole polymer flooding. This paper analyzes the main contradictions in the late stage of polymer flooding in the second block of the western block of a certain area, finds corresponding solutions, further improves the development effect of block polymer flooding, and provides reference for the rational development of other blocks in the future.
Development of a lever type multi-functional plane strain model test device
Authors: Li Jianguang , Sun Gengyu , Yu Zhuoqun , Zou Huisong
Published: November 2019

The lever type multifunctional plane strain model test equipment is mainly composed of the basic frame, loading system, data acquisition and measurement system, and auxiliary device. Its biggest feature is the “multiple use of one machine”, which means a variety of geomechanical tests can be carried out with one equipment. The load is carried out by the principle of double lever amplification. The load can be altered by changing the counterweight at the end of the rod. Since the counterweight is determined, the load is constant. Equipped with an automatic device integrating mining, chip removal, support and monitoring, it can realize quantitative mining, timely chip removal, temporary support, real-time monitoring, improve automation and intelligence of model test, which is closer to the simulated engineering practice. The equipment has excellent mechanical properties and can meet the needs of different geotechnical engineering research.
Research on integrated regional prediction method of dynamic disaster of coal and gas in deep coal roadway
Authors: Yuan Benqing
Published: November 2019

Aiming at the existing regional prediction methods of outburst danger and shock hazard can not meet the needs of precise control of coal and gas dynamic disasters in deep coal roadway excavation working face, using weight comprehensive index method, 13 factors reflecting the outburst and rock burst are considered, such as gas pressure, content and impact energy index, the buried depth of coal seam and gas pressure are taken as the key indexes, and the integrated regional prediction of dynamic risk in deep coal roadway strip is realized; The dividing index of the dynamic risk state grade in the roadway strip is determined, which is divided into four grades: no dynamic risk, weak dynamic risk, general dynamic risk and serious dynamic risk, and the corresponding countermeasures are worked out. The application results show that the integrated regional prediction method realizes the safe and rapid excavation of in Ding Ji mine 1222(1) coal roadway and Xie Yi mine 5131(5) coal roadway which the grade are general dynamic risk, it has important reference significance for similar conditions of mine.
Characteristics and migration rules of major elements of the bauxite in Meitan-Fenggang area, northern Guizhou, China
Authors: Luo Junfeng , Wu Zhaoyang , Tang Jiao , Zeng Daoguo
Published: November 2019

The following results were obtained by analyzing the major elementss of bauxite in the Meitan-Fenggang area: 1) There is a correlation between Al, Si, Fe and Ti elements, and Al is negatively correlated with Si and Fe, Al and Ti have positive correlation, Si is negatively correlated with Fe and Ti; 2) Al, Si and Fe have a downward migration trend, and the migration of Si and Fe to the bottom is the key to the formation of high-grade bauxite; 3) The migration of Fe Al, Si is not completely synchronized, but However, the higher the Al content, the stronger the correlation between the samples Al, Si, and Fe.
Researches on the metallogenic paleogeography and ore-prospecting indicators of bauxite in Meitan-Fenggang area, northern Guizhou, China
Authors: Luo Junfeng , Wu Zhaoyang , Tang Jiao , Zeng Daoguo
Published: November 2019

Based on the previous study, combined with regional data, this paper studied the paleogeography and prospecting indicators of bauxite in Meitan-Fenggang area. The results show that: 1) The humid and hot paleoclimate is the favorable condition for bauxite formation; 2) The paleogeomorphology is closely related to the formation of bauxite, and the Karst depression plays a controlling role in the formation of bauxite; 3) The bauxite is formed in the near lake environment affected by seawater, and the property of water body is weakly alkali reduction. 4) There are a series of effective prospecting indicators in this area, mainly including macro geomorphological, stratum, color and underground water indicators.
Physiological Effects of Combined Stress of Cd, Pb and Ti on Olive
Authors: Liang Jian , Yang Weifei , Yan Quanmou , fang Mao , Cui Nana
Published: November 2019

The physiological effects of Cd, Pb and Ti combined stresses on 3-year-old Olive seedlings were studied in this experiment and the change of heavy metal content in the soil after stress. The results showed that soluble protein, SOD activity and soluble sugar increased first and then decreased with the increase of Cd and Pb combined stress concentration, and then increased again with the addition of 2% and 4% Ti. POD activity decreased first then increased, MAD activity decreased first increased then decreased. The change of heavy metal content in the soil after stress first increased then decreased. Therefore, when the content of heavy metals in soil is low, olive can defend and repair itself to reduce the harm of growing environment. On the contrary, when the metal content in soil is too high, the decrease of plant stress resistance will be detrimental to its growth.
Analysis of Coal Seam Gas Emission Based on Mine Gas Drainage Statistics
Authors: Zhang Jufeng , Li Xuguang , Yang Fengfeng , Xu Tai , Zheng Chao , Miao Zaiquan , Zhang Jianjiang
Published: November 2019

The statistics and analysis of mine gas extraction is very important for mine gas control, which provides a basis for the formulation of mine gas extraction plan. Because of its simple and convenient characteristics, it is favored by the engineering and technical personnel in the coal mine field, and has been widely used, and achieved good results. Based on the statistics of gas drainage in Weijiadi Coal Mine from 2008 to 2018, the characteristics and quantity of gas emission are analyzed according to the statistical results of gas drainage in Weijiadi Coal Mine, and the characteristics of gas emission in the process of driving in the main mining seam are predicted, and the mathematics relations of the length of driving roadway and the quantity of gas emission is obtained.
Mathematical Modelling and Simulation of Adsorptive Moving Bed Reactor for Claus Process
Authors: Zhang Yun
Published: November 2019

Fixed bed reactors are widely used in desulfurization processes. However, this kind of reactors has an obvious disadvantage leading to discontinuous operation that the catalysts and adsorbents must be regenerated periodically. As a continuous operated reactor, moving bed reactor can let both gas and solids move through the reactor, making it possible to remove the saturated adsorbents as well as deactivated catalysts. Meanwhile, fresh gas and solids can be fed into the reactor. This paper builds mathematical model of adsorptive moving bed reactor based on Claus Process. The model is simulated with Aspen Custom Modeler. Simulation results show that adsorptive moving bed reactor has good performance in Claus Process. Under the reaction conditions, the adsorption ability is limited by the temperature. Adequate increment of adsorbent volume fraction in the solids can improve the reactor’s performance.
Research on Analysis Method of Highway Engineering Metrology Comparison Results
Authors: Zhang Chunxia , Lin Zhidan , Peng Lu , Miao Na , Wang Yixu
Published: November 2019

This paper combines the needs of the measurement and traceability of the measurement standard in the highway industry, and the application of the theoretical analysis and measurement method in the highway engineering metrological verification institution through theoretical analysis. The differences and application scopes of the two commonly used statistical methods are discussed with examples. The results show that the analysis results of the two comparison methods are basically the same. In practical applications, the appropriate method should be selected according to the comparison purpose and sample characteristics.