Three Core Technical Systems and Engineering Application of Regional Lightning Protection

Regional lightning protection is a complete theoretical system,mainly including:lightning interception technology(LIPT),lightning strong electromagnetic pulse high-energy absorption technology(MSPD),and regional lightning activity law analysis technology(RLLA).Lightning interception technology uses dispersive waveguide resonant cavity technology to achieve the functions of 46.55 m longer than upward leader of ordinary lightning rod,significantly reducing lightning strike point current by 40%,optimizing space electromagnetic field environment,and effectively intercepting overhead and side lightning strikes,and overcome the limitations of traditional lightning rod.The lightning strong electromagnetic pulse high-energy absorption technology uses distributed parameter balance technology,special disconnector for short circuit current,and parity pairing technology to achieve stronger surge absorption capacity than traditional single pulse SPD and international advanced technical indicators such as timely breaking under power frequency short circuit current,and good energy and time coordination.The analysis technology of regional lightning activity laws accurately identifies lightning strike points through comprehensive analysis of regional lightning activity laws,physical parameters of ion clouds,and the impact on ground electric fields.The three core technology systems complement each other,achieving all-round protection against direct lightning strike and lightning electromagnetic pulse.Several projects achieved zero lightning damage,effectively ensuring the safety of buildings and electronic and electrical equipment in the protected area.

Numerical simulation of protection range in exploiting the upper protective layer with a bow pseudo-incline technique

The developing processes of stress and deformation fields of a protected layer after mining an upper-protective layer with a bow pseudo-incline technique were simulated to locate the protection region. The pressure relief of the protected layer was analyzed after mining the upper-protective layer. The pressure relief angle along the strike and incline were located according to the roles of protection of the deformation and stress pressure-relief of the protective layer after mining. This results show that the upper-protective layer with the bow pseudo-incline technique have an upper and downside pressure relief angle of 85 and 68 degrees respectively; the distribution of strike pressure relief angles along the pseudo-incline working face is uneven and their values range from 38.3 to 51 degrees. The pressure relief angle of the inclined middle location was the largest. The distribution of the protection region of the upper-protective layer with the bow pseudo-incline teelmique located by practical tests and numerical simulation is essentially consistent, compared with the results obtained by these methods.

Determination of protection range of mining upper protective layers and its numerical simulation

Aiming at the limitation of the traditional method for determination of protection region, combined with the actual situation of a mine, a new method for determination of protection region was put forward （including the protection of working face layout and development direction）, that is, gas flow observation analysis on the spot and gas content contrast method. The protection region was determined by gas flow observation analysis, gas content contrast, and computer numerical simulation combined with engineering practice. In the process of gas content test, the fixed sampling method ＂big hole drill reaming, small orifice drill rod connected with core tube＂ was employed. The results show that the determined protection region is in accordance with the actual site situation. The fixed sampling method ensures the accuracy of gas measurement of gas content.

Relationship between the development of ethnic tourism and the protection for regional culture:a case study of Tuwa people

The innocent Tuwa people live in Kanas Lake, a world famous national reserve in northern Xinjiang. With therapid development of tourism today, Tuwa people are finally involved in tourism industry. The development of tourismis a two-edged sword. On the one hand, it boosts the revival of Tuwa culture, provides a large number of employmentopportunities and cross-cultural exchanges, and improves material welfare for Tuwa people. On the other hand, somedisadvantages have also resulted from tourism development, such as the unauthentic exhibition of Tuwa culture, limitedtourists, Tuwa group interaction, and limited material improvement for the Tuwa, etc. This paper takes Tuwa people asa case, illustrates the types, characteristics and the conditions for the development of Tuwa culture, explores the advan-tages and disadvantages resulting from the development of folk-custom tourism industry and then puts forwardsrecommendations on the protection for local cultures as follows: (1) attach great importance to Tuwa culture in thetourism development of Kanas Lake Visitor Attraction; (2) construct the aboriginal village with the consciousness ofprotection; (3) remove the Tuwa village; (4) consummate the management mode and let Tuwa people really benefit fromtourism; (5) restrict the grazing in the scenic spots and protect natural grassland; (6) promote Tuwa people’s ability ofself-supervision and self-management; (7) exhibit Tuwa culture authentically.

Study on the Determination of the Significant National Seismic Monitoring and Protection Regions

The paper describes firstly the principles and scientific train of thought involved in determining the significant seismic monitoring and protection regions (SSMPR) in China. The principles include the gradation principle, i.e. the national level SSMPR and the provincial level SSMPR, the principle of highlighting priorities, namely, the area of an SSMPR should be a fraction of the total area of the country or of the respective province, but the earthquake losses incurred in SSMPR should be a major proportion of the national or provincial ones. The scientific train of thought adopted is to determine the SSMPR on the basis of seismic hazard assessment and loss estimation. Secondly, it reviews the achievements in determining the SSMPRs for the period from 1996 to 2005. The result shows that 10 strong earthquakes occurred during that period in the areas with earthquake monitoring and prediction capability available on the Chinese continent, 8 of which occurred in SSMPRs with the economic loss and death toll accounting for 67% and 92% of the total loss on the Chinese mainland. Lastly, the paper introduces preparatory research for determining the SSMPR for the period from 2006 to 2020, including decade-scale mid-and long-range seismic risk assessment based on seismology, seismogeology, geodesy, earthquake engineering, sociology and stochastics and so on, and the national seismic risk probability map, the seismic hazard (intensity) map, earthquake disaster losses map and the comprehensive seismic risk index, etc. obtained for the period of 2006 to 2020.

Conclusions on the Implementation of Regulation of the National Significant Seismic Monitoring and Protection Regions from 1996 to 2012 in the Chinese Mainland

The regulation of the National Significant Seismic Monitoring and Protection Regions(NSSMPR for short) is defined by the Law of the Peoples Republic of China on Protecting Against and Mitigating Earthquake Disasters.The first stage of implementation of the regulation of NSSMPR in the Chinese mainland was finished from 1996 to 2005.The second stage is being carried on from 2006 to 2020.With the support of the National Social Science Foundation,this paper follows up and evaluates the implementation of the regulation of NSSMPR from 1996 to 2012 in the Chinese mainland.Based on analysis of earthquake examples and investigation data,we find that the effect of disaster mitigation is good,and on this basis,some suggestions are proposed to improve the regulation of NSSMPR.

Protection of regional eco-culture preservation area: Based on the experience of overall protection of intangible cultural heritage

Eco-cultural preservation area is a synthesis of contradiction, which is the existing interregional coordination and conflict between the administrative divisions. Hence, it is quite different from the general integrity of the intangible cultural heritage protection. However, as one form of protection of intangible cultural heritage, it is connected with other forms of protection. Based on the cultural integration, the paper studied and summarized domain of intangible cultural heritage, and further research and investigation of the Eco-cultural preservation areas are discussed.

Distribution Characteristics and Shielding Effects of Ion Clouds

The latest research shows that the ions generated by the corona discharge of lightning rod have dual functions of attracting and shielding lightning discharge. After the lightning rod is installed at a certain height on the ground,the lightning rod tip reaches the corona threshold to ionize the surrounding air and generate positive and negative ions under the action of the electric field at the end of the lightning downward leader. Constrained by Coulomb’s Law,its positive ions( opposite charges attract each other) form an upward leader( streamer),which moves towards the end of the lightning downward leader and is connected to the downward leader,establishing a discharge channel to attract lightning to the needle tip and discharge the current to the ground,and playing a role in attracting lightning. Its negative ions are repelled by the electric field at the end of the lightning downward leader( repelled by isotropic charges) and influenced by the wind,and diffuse in the downwind area to form an ion cloud,inhibiting the growth of corona at the tip of ground objects,and playing a role in shielding lightning. In this paper,Franklin’s understanding of the role of lightning rod and Yang Shaojie’s new definition of the working principle of lightning rod are briefly introduced. The formation mechanism,distribution characteristics,shielding effect,and impact on lightning strike point distribution of ion clouds are analyzed. Additionally,the important role of shielding effects of ion clouds in regional lightning protection is introduced,which provides a theoretical basis for the correct understanding and use of lightning rod.

New Perspective of Architectural Design Based on Immersive Theatre Thinking: A Case Study of Rural Living Room Design in Majia Marsh

The new urbanization provides opportunities for the ecological protection of traditional regional culture. In the context of the integrated development of agriculture, tourism, and cultural industries, this paper integrates the thinking of "immersive theatre" and adopts the design method of multithread dramatic narrative mode to create a number of interactive flow lines in the architecture and focus on the sensory experiences of environment, enabling the traditional regional culture to really touch the audience.

Building national eco-cultural protection areas and the Xiangxi practice in Hunan Province

Since 2007,the Chinese government has initiated the building of national eco-cultural protection areas(NECPAs),thereby embarking on a significant transformation of the model of intangible cultural heritage(IC H)protection in China.To understand the origin and outputs of this policy,this paper demonstrates the context of China's NECPAs.It proposes a conceptual NECPA framework that mainly features regional overall ICH protection.This is followed by an examination of the case of Xiangxi in Western Hunan as a pilot zone for China’s eco-cultural protection.Xiangxi has performed much related work to promote NECPAs and made great progress in regional overall ICH protection.This insight suggests that there are benefits and costs associated with promotion of China's NECPAs and regional overall ICH protection.Despite the advantages of institutional innovation,the unexpected side effects actually undermine the success of plan implementation.