Influencing factors analysis of hard limestone reformation and strength weakening under acidic effect

Roof disaster has always been an important factor restricting coal mine safety production.Acidic effect can reform the rock mass structure to weaken the macroscopic strength characteristics,which is an effective way to control the hard limestone roof.In this study,the effects of various factors on the reaction characteristics and mechanical properties of limestone were analyzed.The results show that the acid with stronger hydrogen production capacity after ionization(pK_(a)<0)has more prominent damage to the mineral grains of limestone.When pKa increases from−8.00 to 15.70,uniaxial compressive strength and elastic modulus of limestone increase by 117.22%and 75.98%.The influence of acid concentration is manifested in the dissolution behavior of mineral crystals,the crystal defects caused by large-scale acid action will lead to the deterioration of limestone strength,and the strength after 15%concentration reformation can be reduced by 59.42%.The effect of acidification time on limestone has stages and is the most obvious in the initial metathesis reaction stage(within 60 min).The key to the strength damage of acidified limestone is the participation of hydrogen ions in the reaction system.Based on the analytic hierarchy process method,the influence weights of acid type,acid concentration and acidification time on strength are 24.30%,59.54% and 16.16%,respectively.The research results provide theoretical support for the acidification control of hard limestone roofs in coal mines.

Revisiting the mitigation of coke formation:Synergism between support&promoters'role toward robust yield in the CO_(2)reformation of methane

CO_(2)reformation of methane(CRM)and CO_(2)methanation are two interconnected processes with significant implications for greenhouse gas reduction and sustainable energy production for industrial purposes.While Nibased catalysis suffers from poor stability due to coke formation or sintering,we report a super stable remedy.The active sites of mesoporous MgO were loaded using wet impregnation.The incorporation of Ni and promoters altered the physical features of the catalysts.Sm–Ni/MgO showed the smallest crystallite size,specific surface area,and pore volume.The Sm–Ni/MgO catalyst was selected as the most suitable candidate for CRM,with 82%CH4 and H2/CO ratio of approximately 100%and also for CO_(2)methanation with the conversion of carbon dioxide(82%)and the selectivity toward methane reaches 100%at temperatures above 300ᵒC.Furthermore,the Sm–Ni/MgO catalyst was stable for 900 min of continuous reaction,without significant carbon deposition.This stability was largely due to the high oxygen mobility on the catalyst surface in the presence of Sm.Overall,we demonstrated the efficacy of using promoted Ni catalysts supported by mesoporous magnesia for the improved reformation of greenhouse gases.

Research on the Joint Reformation for Public Health Services, Medical Insurance and Medical Production Circulation from the Perspective of System Science

Objective To study the linkage points in the reform of public health services,medical insurance and medical production circulation and provide countermeasures for optimizing the reform.Methods The theory of system science was used to analyze the new emergent property of key linkage points in the main reform departments.Results and Conclusion The research found that four linkage points were not active,and all departments of the reform should strengthen their linkage in the following aspects.The departmental linkage in the decision-making mechanism should be strengthened,which requires to revise the assessment indicators of essential drugs in time,and carry out relevant policies.Besides,the linkage of various departments to supervise the use of medical insurance fund should be strengthened.Therefore,the National Health Commission(NHC)and National Medical Products Administration(NMPA)should play their supervisory roles.Lastly,the construction of adverse reaction data sharing platform should be improved.

Overview of the Reports on the Reformation of Personal Income Taxation

Presentation of the reports on the reformation of personal income taxation that have been prepared with a development plan for the Greek economy,that discuss the issue of taxation and point out its important features.The goal is the complete modernization of the tax system,so that it responds more fully to the principles of social justice,contributes to the economic development of the country and is governed by simple and modern procedures,which apply to all tax objects.The purpose of the study is to deepen the proposals for tax reform based on the peculiarities of the Greek economy,the international trends in this field and the weaknesses of the tax system.The effects of a tax reformation are analyzed and how it should take the form of the reform,which,however,requires a new legislation,which will bring about radical and deep cuts,which respond to the new conditions and the internationalization of the economy.Proposals for a set of structural measures,which are necessary for the country’s adaptation to the wider European environment and the elimination of the weaknesses that increase its distance from the other member countries.Citation of the common points of the reports on the reformation of personal income taxation and their adoption by the tax leadership.

Exploring the 2023 Reformation of Financial Systems in Higher Education Institutions and Examining the Practical Aspects of its Execution

As China’s economy has experienced rapid growth,the economic landscape for higher education institutions’financial systems has become increasingly intricate.Consequently,there has been a heightened demand for enhanced financial management in these institutions.Notably,in 2012,the country’s Ministry of Finance and Ministry of Education introduced a new financial system for higher education institutions,and in 2022,the Ministry of Finance publicly revised this system to further standardize financial practices within higher education institutions,align with financial management requirements,and foster the development of these institutions.This paper offers an extensive examination of the updated financial system for higher education institutions compared to the previous version,delving into aspects such as the financial management framework,professionalization criteria for financial directors,enhancements in managing the proceeds from technology and research achievements,and the incorporation of management accounting reports.Additionally,it provides a comprehensive analysis of the challenges faced by financial management in higher education institutions and outlines strategies for addressing these issues.

Exploring the Ideological and Political Education Reformation of Architecture Professional Courses in Higher Education Institutions

"Ideological and political education"is an essential implementation for moral cultivation,which promotes the basic principles of"three comprehensive education".Its teaching effectiveness is related to the overall improvement of the quality of talent cultivation;hence it widely attracts the attention of the academic community.In order to combine professional architectural courses with ideological and political education,and at the same time to realize the innovative teaching concept of collaborative education,teachers in higher education institutions continue to explore and practice their ways,constantly innovate and optimize their knowledge and education systems.

Review on The Teaching of Building Materials in Higher Vocational Colleges Based on the“Three Educations”Reformation

Building materials is not only a basic course content of architectural specialization,but also a practical course content taught in higher vocational institutions.It has a large number of knowledge points,a large number of principled and operational contents,and weak logic,all of which have an impact on the teaching effect.It is necessary to strengthen research on higher vocational building materials curriculum against the background of“three educations”reformation,as well as explore curriculum teaching reform strategy in conjunction with the current situation of higher vocational building materials curriculum teaching,in order to cultivate talents of high quality and professional ability.

Accumulation and Reformation of Silurian Reservoir in the Northern Tarim Basin

Silurian sandstone in Tarim Basin has good reservoir properties and active oil and gas shows, especially thick widely-distributed bituminous sandstone. Currently, the Silurian was found containing both bitumen and conventional reservoirs, with petroleum originating from terrestrial and marine source rocks. The diversity of their distribution was the result of ＂three sources, three stages＂ accumulation and adjustment processes. ＂Three sources＂ refers to two sets of marine rocks in Cambrian and Middle-Upper Ordovician, and a set of terrestrial rock formed in Triassic in the Kuqa depression. ＂Three stages＂ represents three stages of accumulation, adjustment and reformation occurring in Late Caledonian, Late Hercynian and Late Himalayan, respectively. The study suggests that the Silurian bitumen is remnants of oil generated from Cambrian and Ordovician source rocks and accumulated in the sandstone reservoir during Late Caledonian-Early Hercynian and Late Hercynian stages, and then damaged by the subsequent two stages of tectonic uplift movements in Early Hercynian and Pre-Triassic. The authors presumed that the primary paleo-reservoirs formed during these two stages might he preserved in the Silurian in the southern deep part of the Tabei area. Except for the Yingmaili area where the Triassic terrestrial oil was from the Kuqa Depression during Late Himalayan Stage, all movable oil reservoirs originated from marine sources. They were secondary accumulations from underlying Ordovician after structure reverse during the Yanshan- Himalayan stage. Oil/gas shows mixed-source characteristics, and was mainly from Middle-Upper Ordovician. The complexity and diversity of the Silurian marine primary properties were just defined by these three stages of oil-gas charging and tectonic movements in the Tabei area.

Experimental investigation on the reformation and strength weakening of hard limestone by acidizing

Several derivative disasters such as ground pressure disasters and methane explosions can be caused by the hard roof in coal mines.For limestone roofs with fine integrity and extreme hardness,collapse is difficult and the effect of conventional roof control methods is limited.Acidizing reformation is an effective way to weaken the strength of roof strata based on acid-rock reaction.In this study,the rock strength damage law and acid reaction characteristics were tested by the limestone acidification experiment.Besides,the strength degradation mechanism of limestone under the acidity effect was analyzed.The results show that the acid corrosion characteristics of limestone are obvious,as numerous mineral grains generate voids under the effects of acid corrosion,and more defects are formed inside.The acid-rock reaction is the most intense at the early stage and then gradually reaches dynamic equilibrium,and the acid corrosion rate of limestone is 4.24%(10%HCl,360 min).The hard limestone is damaged after acidification.Furthermore,the internal cracks can be induced to rapid initiation and unstable propagation under load,which reduces the strain required for rock failure by 33.33%.The failure morphology is more complicated,and the uniaxial compressive strength and elastic modulus decrease by 52.42%and 34.44%respectively.The strength weakening of hard roof after acidification is due to the defects such as intergranular cracking caused by the corrosion of rock crystals under acidity effect,which accelerate the initiation and propagation of internal cracks with external force.Macroscopically,acidification induced the deterioration of rock mechanical properties by reforming the roof structure.The feasibility of acidizing reformation method to control hard roof is confirmed in this study.

Expanding telemedicine to reduce the burden on the healthcare systems and poverty in Africa for a post-coronavirus disease 2019 (COVID-19) pandemic reformation

The coronavirus disease 2019(COVID-19)global public health emergency,has exposed the fragility of health systems.Access to healthcare became a scarce commodity as healthcare providers and resource-poor popula­tions became victims of the novel corona virus.Therefore,this study focuses on Africa’s readiness to integrate telemedicine into the weak health systems and its adoption may help alleviate poor healthcare and poverty after COVID-19.We conducted a narrative review through different search strategies in Scopus on January 20,2021,to identify available literature reporting implementation of various telemedicine modes in Africa from January 1,2011 to December 31,2020.We summarized 54 studies according to geographies,field,and implementation methods.The results show a willingness to adopt telemedicine in the resource-poor settings and hard-to-reach populations,which will bring relief to the inadequate healthcare systems and alleviate poverty of those who feel the burden of healthcare cost the most.With adequate government financing,telemedicine promises to enhance the treating of communicable and non-communicable diseases as well as support health infrastructure.It can also alleviate poverty among vulnerable groups and hard-to-reach communities in Africa with adequate government financing.However,given the lack of funding in Africa,the challenges in implementing telemedicine require global and national strategies before it can yield promising results.This is especially true in regards to alleviating the multidimensionality of poverty in post-COVID-19 Africa.

On Reformation and the Development of Capitalism

Due to Reformation movement in the 16th century,Protestantism came into being.Lutheranism,Calvinism and Puritanism rationalized and justified worldly economic activity.The Protestant asceticism was considered favorable to the development of capitalistic economy.Religious reform was in a certain degree beneficial to the development of capitalism.This thesis mainly discusses the influence of Reformation upon the development of capitalism.

Experiments on Development of Channel Pattern in the Process of River Reformation

The changing of flow conditions caused by construction of hydro-projects will result in river's refor- mation and development of channel pattern.In this paper,the development of channel pattern in the process of reformation is studied by means of flume experiments.Influence of slope,grain size,angle-of-inflow,dis- charge and discharge process are comprehensively analyzed according to the experimental data.It was found that the channel would be widened as the river slope or discharge increased and grain s...

Researches on an expert decision-making system of technology reformation schemes of a colliery

In this paper, an expert decision-making system of technology reformation schemes of a colliery (for short EDSTRC) is researched by comprehensively using ES and DSS principles and computer technique. The functional and logical structures of EDSTRC as well as its sub-systems are mainly designed, and its development and application environment are simply introduced. EDSTRC is consisted of eight main parts, i.e. data base (DB), knowledge base (KB), model base (MB), approach base (AB), graph base (GB), result base (RB), man-compute system (MCS), and problem-solved system (PSS). Through application of practical examples, it is proved that the EDSTRC’s prototype design is correct, its man-computer interface is amicable, and its applicable prospect is wider.

Cost-Utility Analysis of Liraglutide in Type 2 Diabetes Patients in China after Chinese Reformation of Medical Care System

Objectives: The cost-utility analysis of Liraglutide is aimed at evaluating whether Liraglutide is cost-effective or not after Chinese reformation on medical insurance. The analysis is based on the results of clinical trial conducted in Asia. Methods: We applied a Markov model to estimate the quality-adjusted life years, medical cost and incidence of diabetes-related complications for patients receiving the Liraglutide as an add-on to the metformin treatment. Baseline characteristics were taken from a China’s study while the treatment effect is from an Asian study. The related medical cost and utility score were obtained from a local study in China. Having set 30 years’ simulations, the incremental cost-effectiveness ratio was calculated comparing with glimepiride treatment. The ratio would be compared with the willingness to pay for a quality-adjusted-life-year (QALY) which is three times of the GDP per capita in Beijing. Sensitivity analysis was also performed. Result: During a period of 30 years, the base-case analysis which takes discount rate at 3% shows that Liraglutide 1.8 mg results in an average incremental cost of CNY 82,671.49, an improvement in 0.12 QALYs and a reduction of incidence of diabetes-related complications comparing to glimepiride. The associated incremental cost-effectiveness ratio is CNY 688,929.08. Conclusion: Long-term project shows that taking Liraglutide as an add-on to the metformin treatment will lead to increasing quality-adjusted life years and reduction of incidence of diabetes-related complications. When the price of Liraglutide is reduced by 43 percent in China’s yuan, Liraglutide will be cost-effective in China from the healthcare system perspective taking three times of GDP per capita as our WTP threshold.

Fluid interaction mechanism and diagenetic reformation of basement reservoirs in Beier Sag, Hailar Basin, China

Based on analysis of core observation, thin sections, cathodoluminescence, scanning electron microscope(SEM), etc., and geochemical testing of stable carbon and oxygen isotopes composition, element content, fluid inclusions, and formation water, the fluid interaction mechanism and diagenetic reformation of fracture-pore basement reservoirs of epimetamorphic pyroclastic rock in the Beier Sag, Hailar Basin were studied. The results show that:(1) Two suites of reservoirs were developed in the basement, the weathering section and interior section, the interior section has a good reservoir zone reaching the standard of type I reservoir.(2) The secondary pores are formed by dissolution of carbonate minerals, feldspar, and tuff etc.(3) The diagenetic fluids include atmospheric freshwater, deep magmatic hydrothermal fluid, organic acids and hydrocarbon-bearing fluids.(4) The reservoir diagenetic reformation can be divided into four stages: initial consolidation, early supergene weathering-leaching, middle structural fracture-cementation-dissolution, and late organic acid-magmatic hydrothermal superimposed dissolution. Among them, the second and fourth stages are the stages for the formation of weathering crust and interior dissolution pore-cave reservoirs, respectively.

Teaching Reformation and Practice of “.NET Program Design” Course Oriented CDIO Model

“.NET Program Design” is a very important professional elective course in the Department of Computer Science and Technology. It is a practical, comprehensive curriculum with highly specialized applications. This paper analyses the disadvantages of traditional teaching model in the .NET Program Design, and discusses the methods and practices for teaching reform such as introducing CDIO engineering education model to classroom teaching with project cases, arranging teaching content properly, choosing modern teaching methods and reform on the curriculum assessment system. The practice has proved that this model with highly effective in teaching process can promote the training of students abilities in all aspects.

Analysis on Reformation of Digital Management Education of Prefabricated Construction Project Under the Background of Intelligent Construction

Prefabricated building is an important building development mode at present.It can improve the development speed and production efficiency of the construction industry,reduce the labor intensity of construction,play an important role in the development as well as the modernization of the construction industry.Due to the late development of prefabricated buildings,the talent training of prefabricated buildings lags behind,causing the development of prefabricated buildings to not achieve its required target.Therefore,the characteristics of intelligent construction need to be incorporated,the education of prefabricated buildings needs to be reformed,the education regarding digital management of prefabricated buildings should be improved,and more professional talents should be nurtured.

Bottom-Up Teaching Reformation for the Undergraduate Course of Computer Organization and Architecture

According to the building requirements of “China’s double first class” discipline, traditional computer organization and architecture (COA) course has new challenges including various course expectations and the limited teaching hours. Considering the hierarchy feature of COA, a bottom-up teaching mode is adopted in teaching reformation to meet the challenges. In this paper, details about COA teaching reforms were shown from aspects of teaching contents, teaching methods, handson assignments, and examination methods. These reform experience will benefit teachers who embark on courses related to computer hardware.

Malignant glaucoma treated by low-dose laser cycloplasty: a 1-year multicenter prospective noncomparative study

AIM:To report a one-year clinical outcomes of low-dose laser cycloplasty(LCP)among malignant glaucoma patients.METHODS:In this prospective,multicenter,noncomparative clinical study,participants with malignant glaucoma were recruited and underwent LCP at eight ophthalmic centers in China.Patients were followed up at 1wk,1,3,6,and 12mo.Intraocular pressure(IOP),number of glaucoma medications,anterior chamber depth(ACD),and complications were recorded.Anatomical success was defined as the reformation of the anterior chamber based on slit-lamp biomicroscopy.Recurrence was defined by the presence of a shallow orflat anterior chamber after initial recovery from treatment.RESULTS:A total of 34 eyes received LCP.Mean IOP and medications decreased from 36.1±11.5 mm Hg with 3.3±1.5 glaucoma medications pre-treatment to 20.9±9.8 mm Hg(P<0.001)with 2.9±1.6 medications(P=0.046)at 1d,and 17.4±6.7 mm Hg(P<0.001)with 1.3±1.7 medications(P<0.001)at 12mo.The ACD increased from 1.1±0.8 mm at baseline to 1.7±1.0 mm and to 2.0±0.5 mm at 1d and 12mo,respectively.A total of 32(94.1%)eyes achieved initial anatomical success.During follow-up,2(5.9%)eyes failed and 8(23.5%)eyes relapsed,yielding a 12-month anatomical success rate of 64.3%.Complications including anterior synechia(8.82%),choroidal/ciliary detachment(5.88%)and hypopyon(2.94%)were observed within 1wk.CONCLUSION:LCP is simple,safe,and effective in reforming the anterior chamber in malignant glaucoma.

Molecular simulation study on the evolution process of hydrate residual structures into hydrate

The clathrate hydrate memory effect is a fascinating phenomenon with potential applications in carbon capture,utilization and storage(CCUS),gas separation,and gas storage as it can accelerate the secondary formation of clathrate hydrate.However,the underlying mechanism of this effect remains unclear.To gain a better understanding of the mechanism,we conducted molecular dynamic simulations to simulate the initial formation and reformation processes of methane hydrate.In this work,we showed the evolution process of hydrate residual structures into hydrate cages.The simulation results indicate that the residual structures are closely related to the existence of hydrate memory effect,and the higher the contribution of hydrate dissociated water to the hydrate nucleation process,the faster the hydrate nucleation.After hydrate dissociation,the locally ordered structures still exist after hydrate dissociation and can promote the formation of cluster structures,thus accelerating hydrate nucleation.Additionally,the nucleation process of hydrate and the formation process of clusters are inseparable.The size of clusters composed of cup-cage structures is critical for hydrate nucleation.The residence time at high temperature after hydrate decomposition will affect the strength of the hydrate memory effect.Our simulation results provide microscopic insights into the occurrence of the hydrate memory effect and shed light on the hydrate reformation process at the molecular scale.