The Beijing-Tianjin-Hebei region is subject to the most severe haze condition in China. Against the backdrop of the coordinated development of Beijing, Tianjin, and Hebei, it is of great significance ...to explore the space-time distribution characteristics of high haze pollution industries in the above region. The purpose of this article is to find high haze pollution industries scientifically, analyze the spatial distribution characteristics of high haze pollution industries in Beijing-Tianjin-Hebei correctly, and formulate effective reduction measures for the spatial distribution of high haze pollution industries in different regions of Beijing-Tianjin-Hebei. It hopes that the measures provide a basis for effective to reduce high haze pollution in the Beijing-Tianjin-Hebei region. Using the Gini coefficient and location entropy, this paper explores the space-time characteristics of high haze pollution industries in 13 cities of the Beijing-Tianjin-Hebei region. The results show that those aforesaid high haze pollution industries present an obvious clustering trend in Beijing, Tianjin, Shijiazhuang, Handan, and some areas along the economic axis of China, overall flooding into Eastern coastal and Southern inland areas. By industry, the petroleum processing and coking processing industry, chemical raw materials and chemical products industry, manufacture of non-metallic mineral products, and ferrous metal smelting and rolling processing industry witness a declining clustering trend, as opposed to the electricity, heat production, and supply industry. Meanwhile, core cities of the Beijing-Tianjin-Hebei region have developed high haze pollution industries, and the hinterland lags in economic development. It is necessary to face up to the differences in economic development among areas in the Beijing-Tianjin-Hebei region, promote the staggered development of high haze pollution industries, and build a high haze pollution industry chain with coordinated economic and environmental development, thus reducing the economic gap with each area, and realizing the coordinated development of economy, industry, and environment.
Lead halide perovskite and organic solar cells (PSCs and OSCs) are considered as the prime candidates currently for clean energy applications due to their solution and low‐temperature processibility. ...Nevertheless, the substantial photon loss in near‐infrared (NIR) region and relatively large photovoltage deficit need to be improved to enable their uses in high‐performance solar cells. To mitigate these disadvantages, low‐bandgap organic bulk‐heterojunction (BHJ) layer into inverted PSCs to construct facile hybrid solar cells (HSCs) is integrated. By optimizing the BHJ components, an excellent power conversion efficiency (PCE) of 23.80%, with a decent open‐circuit voltage (Voc) of 1.146 V and extended photoresponse over 950 nm for rigid HSCs is achieved. The resultant devices also exhibit superior long‐term (over 1000 h) ambient‐ and photostability compared to those from single‐component PSCs and OSCs. More importantly, a champion PCE of 21.73% and excellent mechanical durability can also be achieved in flexible HSCs, which is the highest efficiency reported for flexible solar cells to date. Taking advantage of these impressive device performances, flexible HSCs into a power source for wearable sensors to demonstrate real‐time temperature monitoring are successfully integrated.
A flexible hybrid solar cell with extended photoresponse, high power conversion efficiency of 21.73%, and excellent mechanical durability is realized by incorporating a low‐bandgap organic bulk heterojunction layer into perovskite solar cells. Taking advantage of these impressive device performance, the flexible solar cell–sensor integrated system is demonstrated for real‐time temperature monitoring via on‐body evaluation.
The iron and steel industry is an important foundation of the national economy. It is the inevitable choice, to achieve high-quality development in the new era of the iron and steel industry, to ...speed up the green development of the iron and steel industry. This paper studies the effect of steel industry agglomeration on regional economic growth and air pollution. Through the analysis of the characteristics of iron and steel industry agglomeration, and the empirical analysis of the relationship between iron and steel industry agglomeration, regional economic growth, and air pollution, it is found that: (1) Iron and steel industry agglomeration helps to promote economic growth; (2) Iron and steel industry agglomeration has an obvious spatial correlation effect and obviously drives the development of surrounding areas; (3) Iron and steel industry agglomeration will cause air pollution. The marginal effect of air pollution will decline rapidly with the development of iron and steel industry agglomeration. (4) The impact of green process innovation investment on air pollution presents an inverted U-shaped effect, which has a positive effect on air recovery after exceeding the critical point. (5) The air self-purification capacity represented by precipitation, helps to reduce air pollution. Based on the above conclusions, this paper puts forward some policy suggestions, such as making a scientific development plan for the iron and steel industry, accelerating green process innovation, effectively improving regional precipitation and precipitation times, vigorously promoting high-quality development of the regional economy, and comprehensively promoting coordinated development of the iron and steel industry, so as to cope with the dilemma of the coordinated development of the iron and steel industry, regional economic growth, and smog pollution, and strive for international development in the future. In the competition, we should gain the first opportunity and obvious competitive advantage.
Abstract
Continuous monitoring of arterial blood pressure (BP) outside of a clinical setting is crucial for preventing and diagnosing hypertension related diseases. However, current continuous BP ...monitoring instruments suffer from either bulky systems or poor user-device interfacial performance, hampering their applications in continuous BP monitoring. Here, we report a thin, soft, miniaturized system (TSMS) that combines a conformal piezoelectric sensor array, an active pressure adaptation unit, a signal processing module, and an advanced machine learning method, to allow real wearable, continuous wireless monitoring of ambulatory artery BP. By optimizing the materials selection, control/sampling strategy, and system integration, the TSMS exhibits improved interfacial performance while maintaining Grade A level measurement accuracy. Initial trials on 87 volunteers and clinical tracking of two hypertension individuals prove the capability of the TSMS as a reliable BP measurement product, and its feasibility and practical usability in precise BP control and personalized diagnosis schemes development.
In this paper, we construct directed strongly regular graphs with new parameters by using partial sum families with local rings. 16 families of new directed strongly regular graphs are obtained and ...the uniform partial sum families are given. Based on the cyclotomic numbers of finite fields, we present two infinite families of directed strongly regular Cayley graphs from semi-direct products of groups.
With the accelerating urbanization process in China, the extensive economic growth model with high energy consumption and high pollution aggravates atmospheric environmental pollution and restricts ...the sustainable development of the social economy. The Beijing–Tianjin–Hebei region has the most severe haze pollution and the most acute contradiction between resources, environment and economic development. Based on the physical coupling theory, this paper constructs a coupling coordination degree model of the economy, environment and high haze pollution industries, such as the thermal power industry. Through literature analysis and expert investigation of the economic, industrial and environmental data of the Beijing–Tianjin–Hebei region from 2006 to 2018, the coordinated development of the economy, environment and high haze pollution industries, such as the thermal power industry, in the above region, was dynamically monitored. The monitoring results show that the development level of the Beijing, Tianjin and Hebei region is significantly different, and the three subregions have not entered the stage of coordinated development. Moreover, since 2015, they have been in a bottleneck period of development and have not achieved a higher level of progress. The three subregions have different advantages and restraining factors. For example, the backward level of Hebei’s economy and high haze pollution industries, such as the thermal power industry, restrict the coordinated development of the region as a whole. Only by accelerating the high-quality development of the Hebei economy can we break through the bottleneck of the development of Beijing, Tianjin and Hebei.
As one of the largest energy consuming industries, electric power and thermal power industry holds the lifeline of national economy. Although electric power and thermal power industry is the main ...source of industrial sulfur dioxide emissions, there are few studies on the impact of the electric power and thermal power industry on industrial sulfur dioxide emissions, and even fewer literature on the Beijing–Tianjin–Hebei region as the scope of study. Therefore, with the green technology innovation as the research perspective, this paper empirically analyzes the impact of electric power and thermal power industry of Beijing–Tianjin–Hebei region on industrial sulfur dioxide emissions by constructing a spatial econometric model, panel threshold model and collecting relevant data. The research results show that the electric power and thermal power industry is an important source of industrial sulfur dioxide emissions in Beijing, Tianjin and Tangshan with significant spatial spillover effects of industrial sulfur dioxide emissions from the electric power and thermal power industry. The electric power and thermal power industry can significantly suppress emissions when green technological innovation is greater than 9.3186. Therefore, it is necessary to scientifically reduce industrial sulfur dioxide emissions from the electric power and thermal power industry in key cities such as Beijing, Tianjin and Tangshan, establish a joint prevention and control mechanism for industrial sulfur dioxide, improve the level of green technology innovation in areas with serious environmental pollution, and systematically reduce industrial sulfur dioxide pollution from the electric power and thermal power industry.
Since 2012, the frequent occurrence of haze pollution events in China has had a serious impact on people’s work and life. In this paper, the threshold effect, spatial autoregressive and spatial Dubin ...models are used to study the threshold characteristics and spatial effect of technological innovation, environmental regulation and the agglomeration of electric power and thermal power industries on haze pollution. It is concluded that the excessive agglomeration of electric power and thermal power industries is not conducive to the prevention and control of haze pollution, technological innovation is conducive to the control of haze pollution, and strengthening environmental regulation is conducive to the control of haze pollution. Electric power and thermal power industries are important sources of haze pollution and have obvious spatial spillover effects. Some policy suggestions are given, such as moderate control of the agglomeration scale of electric power and thermal power industries, strengthening the technological innovation of electric power and thermal power industries, systematic optimization of environmental regulation and strengthening the joint prevention and control of haze pollution in different regions to provide help for the scientific regulation and control of the agglomeration level of electric power and thermal power industries in different regions and effectively reduce the influence of haze pollution.
In recent years, with the rapid development of China’s economy, high haze industries such as thermal power industry in the Beijing–Tianjin–Hebei region have been over concentrated, and the ...environmental pollution is becoming more and more serious. The formulation and implementation of various policies play a crucial role in the coordinated development of high haze industries such as thermal power industry and economy in the Beijing–Tianjin–Hebei region. Based on the supply and demand matching for policies related to the coordinated development of high haze industries such as thermal power industry and economy in the Beijing–Tianjin–Hebei region, the paper constructs the matching model relevant to the issue as mentioned above, and the evaluation index system of fiscal policy, tax, finance, technology, and public policy through literature analysis and variance analysis, with an aim to analyze the matching degree of policy supply and demand. The results show that: the fiscal policy matches very well, the tax policy matches well, the financial policy and the technology policy barely match, and the matching of public service policy is out of balance. According to the supply and demand matching for policies related to the coordinated development of high haze industries such as thermal power industry and economy in the Beijing–Tianjin–Hebei region, the paper puts forward some suggestions for optimizing the following aspects: strengthening the financial investment policy, perfecting the tax types, deepening the green credit policy, strengthening the technical cooperation policy, and improving the monitoring and warning policy in Beijing, Tianjin, and Hebei. It aims to help promote industrial transformation and upgrading and realize the high-quality economic development in the Beijing–Tianjin–Hebei region.
Owing to a long-term, extensive development model and inadequate industrial development planning, cases of atmospheric environment pollution frequently occur in Hebei province. By using such ...approaches as the Spatial Gini Coefficient, the Herfindahl–Hirschman Index and location entropy, this paper analyzes the spatial-distribution characteristics of atmospheric pollution-intensive industries such as the thermal power industry in Hebei province. As shown, atmospheric pollution-intensive industries, such as the thermal power industry in Hebei province, excessively cluster. As industrial agglomeration continuously intensifies, the spatial imbalance becomes increasingly prominent. Taking the number of days with excellent air quality as a benchmark, this paper divides prefecture-level cities of Hebei province into four types of industrial management and designs targeted strategies for the optimization of atmospheric pollution-intensive industries, such as the thermal power industry. In terms of policies, Type I and Type II cities are advised to strengthen the transfer of atmospheric pollution-intensive industries such as the thermal power industry, and Type III and Type IV cities are advised to improve capacities in atmospheric self-purification and green-technology innovation in a bid to help government departments to scientifically manage atmospheric pollution-intensive industries such as the thermal power industry.
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