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.

China's Infrastructure Development and Supply-Side Structural Reforms

Despite significant improvements in transport, energy and information communication technology （ICT） infrastructures, inadequacies still exist in China＇s infrastructure development in light of emerging demand and industrial transition and upgrade. China lags far behind advanced economies such as the United States, Germany and Japan in terms of the quality of transport infrastructures except railroad,＂ electricity infrastructure is insufficient and service efficiency needs improvement; ICT infrastructure requires all-round upgrade and gaps in Internet bandwidth are striking. This paper suggests that, based on the needs of supply-side structural reform, China must reform its investment and financing systems to enhance the efficiency of infrastructure investment. Efforts must be made to enhance air transport and port infrastructure to support industrial upgrade; to develop the energy Internet to address emerging demands; and to forge a new generation of ICT infrastructure with industrial Internet as the priority to prepare China for the new round of industrial competition.

Supply-Side Structural Reforms and China's Potential Economic Growth Rate

This paper examines the effect of supply-side structural reforms on China＇s potential economic growth rate in the coming decade according to the data the authors have gathered. Under the rapid growth scenario with the implementation of supply-side structural reforms, China＇s potential economic growth rate will reach an average of 6.5% and 5.8% respectively in the 13th Five-year Plan （2016-2020） and 14th Five-year Plan （2021-2025） periods. These rates are 0.2 and 0.3 percentage points higher, respectively, than that under the baseline scenario with the inertia of historic trends. In implementing supply-side structural reforms, China must transform governmental functions, break monopolies, create a comprehensive competitive market environment, foster the creation of pro-innovation mechanisms, refocus on quality and efficiency, and raise capital utilization and labor productivity.

Chinese and US S&T Innovation Policies and Their Effects on Economic Growth Potentials

Since the eruption of the recent global financial crisis, major countries have been pushing forward structural reforms with science and technology （S＆T） innovation at the heart. Since taking office, US President Donald Trump has adopted an ＂America First＂ strategy but has yet to specify a clear S＆T innovation policy. However, Trump＇s current policies have already affected S＆T innovation and his planned budget cuts will impact US growth potentials. Compared with the US, China is steadily implementing its innovation-driven development strategy with significant improvement in S＆ T innovation that increasingly supports economic growth. To spur future economic growth, China should steadfastly follow its S＆T innovation strategy, promote the utilization of S＆T innovation results, boost its economic growth potentials and make the most of global innovation resources.

China's Industrial Upgrade and Human Capital Improvement

Based on statistics, this paper reviews China＇s economic growth and industrial upgrade since the reform and opening up in 1978 and estimates the contribution of industrial restructuring to economic growth. With the years of schooling as the proxy variable of human capital, this paper describes changes in China＇s labor competence during the industrial restructuring process. Then, this paper estimates China＇s future human capital demand and shortage based on economic and demographic forecast. Lastly, this paper proposes recommendations for improving human capital in China with skills development and education.

Methods and Countermeasures for Urban Agricultural Supply-Side Structural Reform in the New Era

Based on the theoretical basis of structural reform of agricultural supply side, the status quo and existing problems of urban agricultural supply side in Tian- jin under the new normal were analyzed. On this basis, the paper analyzed the paths of urban agricultural supply-side structural reform separately from the perspec- tives of factors, investment structure and system innovation, and proposed specific policies and opinions on the structural reform of urban agricultural supply side, pro- viding the theoretical basis and realistic basis for the sustainable development of ur- ban agriculture.

Morphology effect of zirconia support on the catalytic performance of supported Ni catalysts for dry reforming of methane

An immature pinecone shaped hierarchically structured zirconia （ZrO2-ipch） and a cobblestone-like zirconia nanoparticulate （ZrO2-cs）, both with the monoclinic phase （m-phase）, were synthesized by the facile hydrothermal method and used as the support for a Ni catalyst for the dry reforming of methane （DRM） with CO2. ZrO2-ipch is a much better support than ZrO2-cs and the traditional ZrO2 irregular particles made by a simple precipitation method （ZrO2-ip）. The supported Ni catalyst on ZrO2-ipch （Ni/ZrO2-ipch） exhibited outstanding catalytic activity and coke-resistant stability compared to the ones on ZrO2-cs （Ni/ZrO2-cs） and ZrO2-ip （Ni/ZrO2-ip）. Ni/ZrO2-ip exhibited the worst catalytic performance. The origin of the significantly enhanced catalytic performance was revealed by characterization including XRD, N2 adsorption measurement （BET）, TEM, H2-TPR, CO chemisorption, CO2-TPD, XPS and TGA. The superior catalytic activity of Ni/ZrO2-ipch to Ni/ZrO2-cs or Ni/ZrO2-ip was ascribed to a higher Ni dispersion, increased reducibility, enhanced oxygen mo- bility, and more basic sites with a higher strength, which were due to the unique hierarchically structural morphology of the ZrO2-ipch support. Ni/ZrO2-ipch exhibited better stability for the DRM reaction than Ni/ZrO2-ip, which was ascribed to its higher resistance to Ni sintering due to a strengthened metal-support interaction and the confinement effect of the mesopores and coke deposition resistance. The higher coking resistance of Ni/ZrO2-ipch for the DRM reaction in comparison with Ni/ZrOz-ip orignated from the coke-removalabitity of the higher amount of lattice oxygen and more basic sites, confirmed by XPS and CO2-TPD analysis, and the stabilized Ni on the Ni/ZrO2-ipch catalyst by the confinement effect of the mesopores of the hierarchical ZrO2-ipch sup- port. The superior catalytic performance and coking resistance of the Ni/ZrO2-ipch catalyst makes it a promising candidate for synthesis gas production from the DRM reaction.

Deleveraging:Data, Risks and Countermeasures

Based on the latest macro financial data, this paper estimates China＇ s overall leverage ratio and sector-specific leverage ratios for households, non-financial enterprises, government and financial institutions. It is noted with particular emphasis that the tendency of non-financial enterprises to increase leverage has further intensified instead of abated, which warrants our great attention. Considering that increasing leverage of government sector represents a basic international trend since the eruption of global financial crisis, we simulate the paths of dynamic evolution of China＇s debt-to-GDP ratio on the basis of different scenarios of the difference between real economic growth rate and real interest rate, together with the NPL ratio of banks. Result indicates that in the coming two decades, the leverage ratio of China＇s government sector will continue to rise and will not converge. Hiking leverage ratio, growing debt burden and rising non-performing assets present major financial risks facing China for a certain period of time in the future. Under the premise of supply-side structural reforms and in tandem with the efforts of the real economy to reduce overcapacity, inventory and eliminate zombie firms, we suggest that China focus on disposing of non-performing assets and steadily deleverage through the implementation of integrated strategies to prevent debt problems from triggering systemic financial crisis.

China＇s Economic Slowdown under Supply-Side Perspective

This paper creates an analytical framework for ongoing China＇s economic slowdown and reveals the major.factors affecting potential growth rate. First, proceeding from the factors that led to a decline in China ＇s potential growth rate, this paper demonstrates that the slowdown since 2012 is not caused by demand-side shock.s＇ but is a natural result of the demographic transition and the change of economic development stage that stemmed from supply-side factors. It is therefore suggested that the demand- side perspective for cyclical analysis must be abandoned and the supply-side perspective for growth analysis ought to be followed Secondly, this paper argues that it is theoretically unjounded and empirically unconvincing for existing literature based on the growth perspective to simply apply the statistical pattern of ＂regression towards the mean＂ to forecast China ＇s growth outlook and thus arrive at pessimistic conclusions. On this basis, this paper identifies a host of initiatives that can significantly increase potential growth rates and proposes policy recommendations for deriving reform dividends foom supply-side structural reform.

China’s 13th and 14th Five-Year Plans:Review and Advice

The 13th Five-year Plan period ushered in a new era of socialism with Chinese characteristics.During this period,China’s economy transitioned from rapid to high-quality growth and weathered the storms of the trade war with the United States and the COVID-19 outbreak.Chinese policymakers embraced new development concepts,and fought to cut overcapacity and excess inventory,deleverage,lower costs,and bolster weak areas under the theme of supply-side structural reforms.In fighting the three tough battles of major risk prevention,targeted poverty reduction and pollution abatement,China has largely resolved myriad structural contradictions and maintained rapid domestic economic growth and stability.Most targets for the 13th Five-year Plan period have been achieved ahead of time or are near completion on time.Institutional sophistication has bolstered high-quality development.

Setting the Structural Reform of Supply-Side as the Focus and Shifting the Economic Development Model

To focus on SRSS during the 13th Five-Year Plan period(2016-2020) is a necessary response to the changes of the international economic environment and to China's goal of achieving the new normal in economic development. The main reason why the focus shifts from changing EDM to reforming the supply-side structure lies in the fact that structural reform boosts the transformation of EDM, and only by accomplishing the former will the latter be realized. Today SRSS is faced with challenges like different ideologies, insufficient conditions and backward regulations. It should be led by the Five Major Development Concepts proposed by President Xi Jinping, "Innovation, coordination, greenness, openness and sharing," and the "supply-side" and "demand-side" must be simultaneously propelled.

National Planning,Investment & Structural Reform

Along with the further development of its economic structural reform, China’s planning, investment structure reform has made significant headway. A reporter interviewed Gui Shiyong, vice minister of the State Planning Commission on the current situation and orientation of the nation’s planning and investment structural reform.

Problems in Post-crisis Employment for Migrant Workers Remain Unsolved

As indicated by a survey of 105 villages in 19 provinces and cities, the 2008 international financial crisis had a serious impact on migrant workers＇ employment, which is prominently manifested in their earlier return to their hometowns, the dismissal of 20 percent of migrant workers from their jobs and a considerable decline in their wages. Thanks to a series of policies the state adopted to ensure growth and expand consumption, migrant workers soon got re-employed. However, some deep-rooted problems surrounding the issue of migrant workers＇ empoyment came to light as a result of this crisis. These problems need to be solved on an urgent basis, though it will involve a considerable amount of hard work over an extended period of time. While this will require a combination of transitional measures and long-range strategies, the employment of migrant workers should also be incorporated as a fundamental part of the undertaking to ensure economic growth, adjusting the industrial structure, transforming the development mode and pushing forward with the reform.

Supply-Side Structural Reforms of China's Industries

Supply-side structural reforms are structural adjustments and institutional reforms to address the mismatch between supply and demand and improve TFP. The mismatch is exhibited at the supply side and arises from structural contradictions and must be addressed through reforms. Supply-side structural reforms can be analyzed at the levels of firms, industries and government to arrive at theoretical and systematic conclusions that offer practical guidance. Based on this perspective, this paper proposes policy recommendations on how to deal with zombie firms, reduce cost for manufacturing companies, deepen SOE reforms, eliminate overcapacity, implement ＂Made in China 2025＂ and Internet＋ strategies, promote Beijing-l^anjin-Hebei integrated development, as well as develop the Yangtze River Economic Belt and the old industrial bases of the northeast.

Local Officials' Tactical Adjustment of Economic Growth Targets under China's Coordinated Regional Development Policy

This paper intends to examine Chinese local officials' behavior for economic growth after the central government's implementation of economic restructuring policy.Theoretically,this paper has demonstrated that when the central government credibly shifts its priority from overall national growth to regional economic restructuring,it will adopt an economic policy in favor of less developed region and local government officials will tactically adjust growth targets accordingly;when the restructuring policy has reached a wide enough coverage of benefit,officials of developed region will relatively lower growth targets for their respective jurisdictions.Empirically,this paper employs the growth targets laid out in the provincial Government Work Reports between 2001 and 2012 and the growth targets set in the five-year plans for the period between 1996 and 2015,and has discovered that changes of inter-provincial gaps are dominated by growth targets;after the central government has launched the program of regional economic restructuring on a full scale,developed provinces start to lower growth targets set for their respective jurisdictions.This paper's discoveries are robust and provide an explanation to the new tendency of China's economic growth in recent years,i.e.,economic growth of eastern region slows down,interprovincial gaps narrow and the central government has adopted the policy of coordinated regional development in favor of inland regions.

Analysis of Oil & Gas Policies in the World's Major Countries

In recent years, due to low oil prices, resource countries have been carrying out oil & gas industry reforms and accelerating structural reform of their energy industry. At the supply side, taxes have been reduced; at the comsumption side, taxes are on the rise. These resource countries have also opened up their oil and gas sectors in the hopes of attracting more domestic and foreign capital. With the Paris Agreement coming into effect in 2016, green and low-carbon development has become the consensus of global energy development. Although the development of clean energy has currently slowed down because of low oil prices, clean energy will be the world's common direction of development in the long run. Currently, countries continue to support the development of clean energy, although the manners of their support are changing.

Properly Understanding Supply–side Structural Reform in the Cultural Sector

The proposal of supply–side structural reform in the cultural sector is based on theoretical inspiration from the economic sector and actual issues in the cultural sector. A proper understanding of the proposal is crucial to the implementation of the reform which should be based on the backgrounds of macroscopic reform and cultural development of the country as well as the need for theoretical innovation. The reform should be carried out with a clear understanding of China's current conditions, a clarification of the reform thinking, the similarities and differences of supply–side structural reforms between the cultural and the economic sectors, as well as an analysis of issues related to the "supply–side" and "structure" in the cultural sector. Concerted efforts from the government through guidance, and market entities through operation should be made to apply appropriately to the reform principle of "unity of doubles effects." Innovations, especially those in technology and institutions, should be promoted as a new momentum to drive cultural development. Concerted efforts from the government and enterprises should underpin optimal supply and a mechanism for competition should be established to ensure effective supply in the cultural sector. In the meantime, the upgrading of demand should be used as a new guidance for effective supply and investment should be oriented to supplement the need for public cultural services. Attention should be paid to a satisfaction–oriented approach to fill the gaps in cultural consumption. For the cultural industry and undertakings, it is now the prime time which brings along great opportunities for development and challenges for reform. From now on the cultural sector should seek its development from transformation and upgrading. Supported by the central government through policy incentives and driven by technological innovations and the capital markets, the cultural industry will maintain stable growth for a relatively long period. In the implementation of supply–side structural reform in a well–organized and all–round way, governments, markets, enterprises, and the industry should each perform their functions and make concerted efforts for innovation to jointly promote the sound development and sustainable growth of the cultural sector.

Evolution process,development goal and realization path of China’s agricultural green development

The agricultural green development process is sorted out from the historical perspective,combined with the“No.1 Central Documents”issued by the central government over the years and the relevant policy documents.Three stages are concluded,including embryonic stage,development stage,strategic promotion and promotion stage.Agricultural green development has three major goals,including providing high-quality agricultural products,efficient utilization of agricultural resources,protection and construction of beautiful countryside.The effective paths for achieving the above goals are agricultural supply-side structural reform,agricultural modernization and rural revitalization.The green development of agriculture is the intersection of the three to alleviate resource environmental pressure and change agricultural production mode.

Research on the relationship between Pension Finance and the Supply-Side Structural Reform in China

The development of pension finance is of great significance to China. first of all, the development of pension finance is conducive to improving China＇s multi-level and multi-pillar pension system, promote the sustainable development of the social security system; secondly, the development of pension finance will create a new ＂blue ocean＂ in the financial markets, which is conducive to the improvement of China＇s financial system and capital market;finally, the development of pension finance will help supply-side reforms,which is conducive to the healthy development of the national economy of china. But now there are many difficulties： first, the top-design of China＇s social security system is not perfect; secondly, the current development model of pension finance in China is unclear, the return on investment mechanism is not perfect, the attractiveness of these projects needs to be improved; finally, under the background of Interact finance, mixed supervision is imminent. Therefore, under the new economic conditions must be structured from the supply side of the reform, the development of pension funds to seek the right ideas.

THE WAY FOR STATE FOREIGN TRADE ENTERPRISES TO ADOPT STRUCTURAL REFORM

The Sichuan Provincial ChangjiangEnterprise Company, the former ofSichuan Provincial ChangjiangEnterprise (Group) Holdings Co.(SPCEGHC), is a comprehensive foreigntrade enterprise under the direct leadershipof the provincial government, mainly engagedin various kinds of foreign trade businessand as an agent for clients, involving deliveryof goods to foreign countries, the exchangeof technology, and the repair and leasing ofdomestic equipment. It was restructured tobecome an enterprise group in 1988, a"window" corporation on the province.