bluuebunny/crossref_metadata_2025_split huggingface dataset:
Quantum Fisher information matrix and multiparameter estimation
Authors: Liu Jing , Yuan Haidong , Lu Xiao-Ming , Wang Xiaoguang 
Published: November 2019

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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.