Discussion on the Prevention and Control Countermeasures of Sudden Disasters on Protected Vegetable in Hebei Province

Protected vegetable production made the traditional agriculture gradually get rid of the shackles of nature, broke the seasonal traditional agriculture and realized the anti season list of agricultural products. While protected vegetables often encountered sudden disasters in production and were restricted with the conditions of low temperature and weak light. Aimed at the sudden disasters of protected vegetable production in Hebei Province,the countermeasures for disaster prevention and control were put forward from the aspects of variety selection, seedling treatment technology,grafting technique,cultivation and management,flower and fruit retention technology,application of exogenous substance,rational fertilization,transgenic technology and so on,in order to reduce production risks and cut loss,realize that protected vegetable production is safe,good-quality and efficient.

Experimental study on the effect of water absorption level on rockburst occurrence of sandstone

To investigate the mechanism of rockburst prevention by spraying water onto the surrounding rocks,15 experiments are performed considering different water absorption levels on a single face.High-speed photography and acoustic emission(AE)system are used to monitor the rockburst process.The effect of water on sandstone rockburst and the prevention mechanism of water on sandstone rockburst are analyzed from the perspective of energy and failure mode.The results show that the higher the ab-sorption degree,the lower the intensity of the rockburst after absorbing water on single side of sand-stone.This is reflected in the fact that with the increase in the water absorption level,the ejection velocity of rockburst fragments is smaller,the depth of the rockburst pit is shallower,and the AE energy is smaller.Under the water absorption level of 100%,the magnitude of rockburst intensity changes from medium to slight.The prevention mechanism of water on sandstone rockburst is that water reduces the capacity of sandstone to store strain energy and accelerates the expansion of shear cracks,which is not conducive to the occurrence of plate cracking before rockburst,and destroys the conditions for rockburst incubation.

Pollution Status of Dioxins Persistent Organic Pollutants in Guangxi and Control Countermeasures

Production and pollution control situations of dioxins persistent organic pollutants in Guangxi were introduced.Pollution status of dioxins persistent organic pollutants in Guangxi was understood,and the existing problems in pollution control were analyzed,and finally pollution control countermeasures and suggestions were proposed.

Status quo and Countermeasures of Industrial pollution in Shucheng Coutny

The research described industrial pollution status quo from geographical location,industry distribution,pollutant variety and quantity of Shucheng County and proposed countermeasures and suggestions.

Issues in the outburst prevention work of coal mines in Guizhou Province and the analysis of its countermeasures

In order to reduce the occurrence of coal and gas outburst accidents, and improve the capability to prevent gas hazards and realize the safe and efficient mining of coal enterprises. The distribution of the outburst coal mining area of Guizhou Province and the status of coal and gas outburst and the problems in the current outburst prevention methods were analyzed. The main issues were pointed out such as the lack of regional outburst prevention measures, unsatisfactory effect in drainage, poor management and implementation, as well as personnel that need more training. The prevention situation of coal and gas outburst in Guizhou Province was considered. In accordance with the above problems, from the perspective of strengthening geological exploration, testing coal seam parameters, studying outburst prevention technologies, deploying mining systems rationally, improving mine safety management systems, and strengthening protection facilities and other aspects, a targeted outburst prevention measure and proposals were put forward.

Study on Risk Assessment of Summer Rainstorm Disaster and Countermeasures for Disaster Prevention and Mitigation in Shaoyang City

Using summer(June-August)precipitation observation data in 10 representative stations of Shaoyang City during 1971-2021 and disaster data caused by summer rainstorm in nine counties(cities)and four districts of Shaoyang during 1981-2021,statistical analysis on summer rainstorm and its caused disaster in Shaoyang was conducted,and spatial and temporal characteristics of summer rainstorm and spatial distribution rule of disaster were found out.The results showed that(1)the rainstorm disaster in Shaoyang City occurs almost every year and is highly seasonal.(2)Rainstorm disaster loss is the first of other meteorological disasters.(3)The summer rainstorm disaster has the characteristics of sudden and destructive.On this basis,the relative grades of rainstorm disaster risk degree and disaster loss degree were divided,and the risk assessment of rainstorm and flood disaster in Shaoyang City was made,and the disaster prevention and mitigation measures and countermeasures were put forward.The research could provide scientific decision basis for party and government departments guiding flood fighting and disaster relief.

Current Situation and Countermeasures of Weather Modification Ground Operation in Heilongjiang Province

Heilongjiang Province is the granary of China,which plays a key role in ensuring the national food security.The total grain output of Heilongjiang Province has ranked first in China for 12 consecutive years.In the past four years,it has been stable at more than 75 billion kg,a record high.One bowl of rice in every nine bowls in China comes from Heilongjiang.The work of weather modification and disaster prevention and reduction is an important measure to ensure the development of agricultural production,and is the key of meteorological services for agriculture.Based on the actual work of artificial weather modification in Heilongjiang Province,this paper analyzes the current situation of ground operation in Heilongjiang Province,studies and judges the safety production,and puts forward reasonable countermeasures.The purpose is to improve the ground operation ability of artificial weather modification and provide safe and scientific services for agricultural production.

Countermeasures and Prevention of Railway Traffic Accidents in the Early Days of the Founding of the People’s Republic of China

In the early days of the founding of the People’s Republic of China,in order to restore the national economy as soon as possible,the Communist Party of China carried out maintenance and repairs on the railways that caused serious damage to transportation tasks through war-torn smoke,and carried out large-scale railway construction.However,in the course of operation,railway safety accidents occur frequently due to outdated equipment,low quality of staff,lack of rules and regulations,vandalism,and various natural disasters.In the face of severe conditions,the railway authorities summed up the accidents and learned the safety of the railways,so that the railway transportation industry,which started after the founding of the country,was gradually on the right track,and laid a solid foundation for the safe development of the railway industry.

Prevention and Countermeasures of Driving Hazards

As a modern means of transportation,cars have made travelling much easier.However,cars also lead to many traffic accidents,which are often dangerous.Through an investigation and analysis of traffic accidents,it was found that the hidden dangers of driving are one of the main causes of car accidents.In order to better ensure the safety of driving,the hidden dangers of driving should be better prevented,traffic safety measures should be improved,and better protection should be provided for people’s lives and property.Therefore,we analyzed the hazards of driving and proposed prevention measures,in hopes of improving driving safety.

Pollution of Solid Waste to Agricultural Environment and Preventive Countermeasures

This paper elaborated the pollution and hazards caused by different kinds of agricultural solid wastes to the agro-ecological environment from the aspects of the types of solid wastes and the way they are produced. Besides,it came up with some countermeasures for preventing and controlling solid waste pollution and hazards.

Optimization of Preventive Grinding of Backup Roll against Contact Fatigue Cracking

In order to optimize the current grinding procedure of the backup roll of 2050 continuously variable crown (CVC) mills, the behavior of rolling contact fatigue (RCF) cracking was investigated. Two RCF short cracks, including vertical short crack and ratcheting short crack initiated from ratcheting, were observed. The behavior of both RCF cracks was analyzed in detail. Then a modified grinding procedure was proposed according to the behavior of RCF cracks and the preventive grinding strategy.

Temperature control and cracking prevention in coastal thin-wall concrete structures

A three-dimensional finite element program for thermal analysis of hydration heat in concrete structures with a plastic pipe cooling system is introduced in this paper. The program was applied to simulation of the temperature and stress field of the Cao＇e Sluice during the construction period. From the calculated results, we can find that the temperaiure and stress of concrete cooled with plastic pipes are much lower than those of concrete without pipes. Moreover, plastic pipes could not be corroded by seawater. That is to say, a good effect of temperature control and cracking prevention can be achieved, which provides a useful reference for other similar nearshore concrete projects.

Study on Non-engineering Countermeasures of Meteorological Disaster Prevention in Large Cities

For the main meteorological disasters and their characteristics in big cities of China,from city planning,laws and regulations,disaster management,contingency plan implementation,monitoring and early warning,information spreading,disaster insurance,science propaganda and so on,we put forward the suggestion of strengthening non-engineering countermeasures of meteorological disaster prevention in large cities of China,providing decision-making reference for urban disaster prevention and mitigation.

Cause and Prevention Measures of Concrete Cracks during the Construction of Road and Bridge Engineering

Road and bridge engineering is an indispensable part of socialist economic construction in China, whose construction quality significantly affects the infrastructure construction level in the whole society. To meet the rapid economic development of various regions, construction scale and quantity of road and bridge engineering have been continuously expanded and increased, therefore, higher requirements for construction quality and construction standard are also presented. During the construction of road and bridge engineering, concrete crack is a key problem which affects the construction quality. In this regard, this paper analyzes cause and prevention measures of concrete cracks during the construction of road and bridge engineering, and hopes to provide construction personnel with valuable references.

Research on the Prevention Methodologies and Environmental Protection Countermeasures for Oil Pollution based on Latest Techniques from China and Abroad

In this paper, we conduct research on the prevention methodologies and environmental protection countermeasures for oil pollution based on latest techniques from China and abroad. Petroleum and petrochemical industry will also be able to have serious water pollution. Against oil pollution increasingly serious phenomenon, about how to control oil pollution has also carried on the thorough research and accumulated in the process of specific management experiences and lessons. We conduct theoretical analysis between the state-of-the-art methods of environmental protection countermeasures with examples, We firmly believe that more advances will occur in the future.

High Yield Transfer of Clean Large-Area Epitaxial Oxide Thin Films

In this work,we have developed a new method for manipulating and transferring up to 5 mm×10 mm epitaxial oxide thin films.The method involves fixing a PET frame onto a PMMA attachment film,enabling transfer of epitaxial films lifted-off by wet chemical etching of a Sr3Al2O6 sacrificial layer.The crystallinity,surface morphology,continuity,and purity of the films are all preserved in the transfer process.We demonstrate the applicability of our method for three different film compositions and structures of thickness~100 nm.Furthermore,we show that by using epitaxial nanocomposite films,lift-off yield is improved by~50% compared to plain epitaxial films and we ascribe this effect to the higher fracture toughness of the composites.This work shows important steps towards large-scale perovskite thin-film-based electronic device applications.

Marine disaster prevention and integrated coastal zone management

Ocean is home town of wind and rain, treasury of resources. To exploit and use ocean will make great contribution to people’s existence and development. China is a great oceanic country with pre cinct sea area of 3,000,000 km2. The eastern coastal region with only 60 km width, 15 % area and 40% of population of China, has created about 60% of GDP and has become the most developed region. But marine disaster in China is frequent and serious. From statistical data, economy loss made by surge, billow, sea ice, tsunami, red tide, oil spill, coast erosion, bay deposit, sea water intrusion, sea level rise, land salinization, sea water pollution, etc. increase quickly. Economy loss per year is one billion in the l980s, 10 billion in the l990s, exceeded 20 billion in 1996, and 30 billion in 1997. About 80% of it happened in the coastal area. So, marine disaster at present has become obstacle of society progress and economy development in coastal area. To mitigate marine disaster has become need for the economy development, also important task of the integrated coastal zone management. In this article, we briefly introduce countermeasures for marine disaster prevention, coastal zone management, and achievements made in the past 50 years, its problems now confronted, and the main countermeasures in the 21St century.

Comprehensive Risk Prevention of "Ice Silk Road" Construction in the Context of Global Warming

The Report of the 19 th National Congress of the Communist Party of China has taken the Belt and Road Initiative and the implementation of the the Belt and Road Initiative as essential parts of China’s economic construction and multi-faceted diplomatic layout. As an important navigation channel for the ' 21 st Century Maritime Silk Road',the Arctic Route has unlimited development prospects in scientific research,transportation,resources,tourism,etc. Therefore,it is feasible to take this opportunity to adhere to the three policy concepts of respect,cooperation and mutual benefit,to deepen political,economic,trade and scientific and technological cooperation with the Arctic countries and interested countries. Starting from the joint creation of the ' Ice Silk Road' between China and Russia,this paper analyzed the enormous challenges faced by traditional routes. The Arctic Route has the obvious advantages and the values of economy,politics,resources,shipping and scientific research. The development of Arctic Route faces threats and limitations of substrate data,development technologies,and extreme marine meteorological disasters. Therefore,this paper believes that the development and construction of the Arctic Route with the aid of meteorology should be fully integrated into the construction of Belt and Road Initiative,strengthen the research on the geographical and climatic environment of the Arctic Ocean,deepen the monitoring of climate services and climate change in the Arctic Ocean,and create a safe Arctic Route. Besides,it is necessary to vigorously enhance the international cooperation and exchanges in the research of the Arctic Ocean,and build a large-scale scientific research plan with the aid of the joint creation of ' Ice Silk Road' by China and Russia. Besides,it is recommended to develop a variety of meteorological observation methods to enhance the early warning capability of disaster prevention and mitigation. In particular,it is recommended to vigorously develop the offshore meteorological observation capability of the ' Ice Silk Road',and continuously meet the needs of meteorological services and disaster prevention and mitigation for the construction of Belt and Road Initiative. In addition,it is necessary to comprehensively build a Chinese meteorological polar discipline system to meet the future demands of the Arctic Route.

Sustainable Community Epidemic Prevention Countermeasures against Public Health Emergencies

How to deal with public health emergencies is an important issue related to the normal life of community residents. However, after the corresponding understanding, it is found that a series of unsustainable epidemic prevention factors have been exposed in the community in the COVID-19, such as blocked access to basic materials, unsafe living environment, and lack of social platforms. In view of these problems, based on Maslow’s hierarchy of needs, the changes in the hierarchy of needs of residents during the epidemic were analyzed, and sustainable community epidemic prevention strategies were proposed from five aspects of material storage, safe environment, social platform, respect opportunity and self-worth realization, so as to provide effective reference for future response to public health emergencies.