Progress and prospect of mid-deep geothermal reinjection technology

Mid-deep geothermal reinjection technology is crucial for the sustainable development of geothermal resources,which has garnered significant attention and rapid growth in recent years.Currently,various geothermal reinjection technologies lag behind,lacking effective integration to address issues like low reinjection rates and thermal breakthrough.This paper reviews the basic principles and development history of mid-deep geothermal reinjection technology,focusing on various technical methods used in the process and analyzing their applicability,advantages,and disadvantages under different geological conditions.It highlights the unique challenges posed by deep geothermal resources,including high temperature,high pressure,high stress,chemical corrosion,and complex geological structures.Additionally,it addresses challenges in equipment selection and durability,system stability and operation safety,environmental impact,and sustainable development.Finally,the paper explores future directions for mid-deep geothermal reinjection technology,highlighting key areas for further research and potential pathways for technological innovation.This comprehensive analysis aims to accelerate the advancement of geothermal reinjection technology,offering essential guidance for the efficient reinjection and sustainable development of geothermal resources.

Research Progress of Additive Manufacturing Technology in Energetic Material Field at Home and Abroad

As a subversive manufacturing technology, additive manufacturing technology has many technical advantages such as high freedom of design and not limited by complex structure of parts. The application of additive manufacturing technology to the charge molding of energetic materials will subvert the traditional manufacturing concept of energetic materials, realize the advanced charge design concept, shorten the research and development time of weapons and equipment, and improve the comprehensive performance of weapons and equipment, which is of great significance for the rapid development of high-tech weapons and equipment. This paper analyzes the research progress of additive manufacturing technology in the field of energetic materials at home and abroad and puts forward some suggestions for future research of this technology. .

New Progress on All Solid State Laser Technology in China

1 Significance of All Solid State Laser (DPL) Technology in Field of LaserBecause of the advantages of high conversion efficiency, good beam quality, small size and light weight, DPL becomes the hotspot and priority of development of laser technology. It may be the main body of laser in the future and replace gas laser and liquid laser. It is a great revolution of laser technology.The developed countries vie in developing DPL. China has achieved great success in this field, but there is a wide gap between the developed countries and us. We should attach great importance to it.

Progress of Internet Video Technology

In China, currently there are more than 100 million videos being watched everyday on the Internet. There are three kinds of Internet videos: video sharing, Video on Demand (VoD), and Peer-to-Peer (P2P) streaming media. Video sharing is based on browser/server mode, severing user generated content. VoD is based on client/server mode and needs to be paid for. P2P streaming media is based on P2P mode service for hot content. To address P2P traffic optimization and content regulation, China National Information Technology Standardization Technical Committee sets up P2P working group to make relevant standards.

Progress in Technology of Main Liquid Rocket Engines of Launch Vehicles in China

Liquid propellant rocket engines for a launch vehicle are an essential aerospace technology, representing the advanced level of hi-tech in a country. In recent years, China’s aerospace industry has made remarkable achievements, and liquid rocket engine technology has also been effectively developed. In this article, the development processes of China’s liquid rocket engines are discussed. Then, the performance features of China’s new generation liquid rocket engines as well as the flight tests of the new-generation launch vehicles are introduced. Finally, the development direction and the most recent progress of the next generation large-thrust liquid rocket engine is presented.

Values of the Times of Marx's Theory of Science and Technology Progress and Utilization of Natural Resources

Marx's theory of scientific and technological progress and utilization of natural resources is an indispensable and important part of Marx's economic theory.To realize the harmonious unification of man and nature,man must correctly understand the effect of scientific and technological progress on the use of natural resources,fundamentally solve the problem that scientific and technological progress cannot replace the position of natural resources in economic development,and objectively evaluate the relationship between human power and the power of nature.Grasping and comprehending the scientific connotation of Marx's theory of scientific and technological progress and utilization of natural resources has a very important theoretical value and practical significance for saving and effectively using natural resources and building an environment-friendly society.

Progress of welding technology in aviation industry

Welding in aviation industry has become one of the dominate processing technologies for manufacturing flying apparatus.The percentage of welded structures in designs of new flying apparatus has been continuously growing up.Welding technology provides a freedom and guarantee to new structure design and new material application. Technical and economic benefits have been obtaining in application of newly developed welding technologies and achievements in research, such as, SPF/DB,electron beam welding, breezing,low stress nondistortion welding etc.

Progress of the Chinese shipbuilding industry and welding technology

The China state shipbuilding corporation (CSSC), a leading shipbuilding enterprise of the Chinese shipbuilding industry, has made rapid progress during recent years. The welding technology, considered as the crucial factor in the development of the industry, plays a significant role. This paper presents the growth of shipbuilding technology, the associated welding processes and the prospects for the shipbuilding industry.

Progress of Journal 'Advanced Technology of Electrical Engineering and Energy'

The paper has introduced the Journal 'Advanced Technology of Electrical Engineering and Energy',presented its main journal evaluation indexes. The result indicates that the journal has made great progress in recent years. It gives much info. about the journal to authors.

Technology Progress and the Market Power of Middlemen

The normative mathematic model is used to analyze the effect of the technology progress on middlemen. The incomes of traders and middlemen in different transaction mechanisms are compared on the base of static transaction models which are followed by the dynamic factor of technology progress. It can be found that the indirect trade is dominant in the circumstance where search cost is high. With the technology progress, the search cost trends to decrease. The increase in direct trade will have influence on the middlemen. But the middlemen will not disappear; its market power is dependent not only on the absolute level of the technology, but also on the comparative level of the technology adopted by the different transaction mechanisms.

Research Progress on the Development of Modern Agricultural Science and Technology Park

This paper summarizes the typical models,construction theory and development status of modern agricultural science and technology parks at home and abroad,in order to provide a reference for the sustainable development of modern agricultural science and technology parks in China.It is found that at present,the agricultural science and technology park in China is in the stage of quantitative development,neglecting the qualitative construction of the park.This paper points out that the balanced relationship among ecology,economy and society should be adjusted to promote the sustainable development of the park.

Research Progress on Rapid Breeding Technology of Anoectochilus roxburghii Seedlings

As a traditional precious Chinese herbal medicine,Anoectochilus roxburghii has the cooling and detoxifying effects,and can nourish yin to reduce pathogenic fire,and has anti-inflammatory and analgesic effects. In this paper,we summarized the research progress in detail about the biological characteristics,resource distribution,composition,medicinal value and rapid seedling breeding technology concerning the rare Chinese herbal medicine A. roxburghii,in order to provide a reference for the in-depth study and rational development and utilization of A.roxburghii.

INPUT-OUTPUT MODELS OF SCIENCE AND TECHNOLOGY AND ITS APPLICATION IN EVALUATING PROGRESS OF ENTERPRISE SCIENCE AND TECHNOLOGY

The method of compiling input-output models of science and technology was studied,and the application of input-output techniques in evaluating the progress of enterprise science and technology was discussed.And the models for determining direct,indirect and full contributions of the progress of enterprise science and technology have been set up which can be used to analyse and evaluate the direct,indirect and full benefits of the progress of enterprise science and technology.

Ten major progress of geological science and technology of China Geological Survey(CGS) and Chinese Academy of Geological Sciences (CAGS) in 2018

1.Major breakthroughs of shale gas investigation in west area of Hubei, China Main research institutes: Shale Gas Joint Scientific and Technological Headquarters in Yichang, Scientific and Technological Struggle of Shale Gas in South China, CGS;Wuhan Centre, CGS, etc. Main performer:Zhang Junfeng Major breakthroughs have been made in shale gas investigation of Doushantuo Formation of Sinian, where highyielding shale gas flow with 5.53×10^4 m^3/d of stable gas and 1.98×10^5 m^3/d of open flow was obtained in Eyangye 2HF well.

Progress in Earthquake Science and Technology in China: Review and Prospects (I)

In the article the author looks back the hard development course and great progress in earthquake science and technology in China during the last near a half of century and expounds the following 3 aspects: (1) The strong desire of the whole society to mitigate seismic disasters and reduce the effect of earthquakes on social-economic live is a great driving force to push forward the development of earthquake science and technology in China; (2) To better ensure people’s life and property, sustainable economic development, and social stability is an essential purpose to drive the development of earthquake science and technology in China; and (3) To insist on the dialectical connection of setup of technical system for seismic monitoring with the scientific research of earthquakes and to better handle the relation between crucial task, current scientific level, and the feasibility are the important principles to advance the earthquake science and technology in China. Some success and many setbacks in earthquake disaster mitigation consistently enrich our knowledge regarding the complexity of the conditions for earthquake occurrence and the process of earthquake preparation, promote the reconstruction and modernization of technical system for earthquake monitoring, and deepen the scientific research of earthquakes. During the last 5 years, the improvement and modernization of technical system for earthquake monitoring have clearly provided the technical support to study and practice of earthquake prediction and precaution, give prominence to key problems and broaden the field of scientific research of earthquakes. These have enabled us to get some new recognition of the conditions for earthquake occurrence and process of earthquake preparation, characteristics of seismic disaster, and mechanism for earthquake generation in China’s continent. The progress we have made not only encourages us to enhance the effectiveness of earthquake disaster mitigation, but also provides a basis for accelerating further development of earthquake science and technology in China in the new century, especially in the 10th five-year plan. Based on the history reviewed, the author sets forth a general requirement for development of earthquake science and technology in China and brings out 10 aspects to be stressed and strengthened at present and in the future. These are: upgrade and setup of the network of digitized seismic observation ; upgrade and setup of the network for observation of seismic precursors; setup of the network for observation of strong motion; setup of the laboratories for experiment on seismic regime; establishment of technical system for seismic information, emergency command and urgent rescue; research on short-term and imminent earthquake prediction; research on intermediate- and long-term earthquake prediction; research on attenuation of seismic ground motion, mechanism for seismic disaster, and control on seismic disaster; basic research fields related to seismology and geoscience. We expect that these efforts will significantly elevate the level of earthquake science and technology in China to the advanced international level, improve theories, techniques, and methods for earthquake precaution and prediction, and enhance the effectiveness of earthquake disaster mitigation.

Progress of 3G Evolution Technology Standardization

The challenges brought by broadband wireless access technologies to cellular mobile communication technologies speed up the study and standardization of 3G evolution technologies that support higher data rates. Both the 3GPP and the 3GPP2 have launched research programs on the study and standardization of the emerging 3G evolution technologies. The Long Term Evolution (LTE) program of 3GPP has made progress in key technical indexes of air interface, wireless network architecture and high-level protocols. At the same time, the Air Interface Evolution (AIE) program of 3GPP2 has made study achievements in the formulation of air interface standards for Layer 2 and upper layers, as well as for the physical layer.

Will Market-Oriented Reforms Propel Technology Progress?Empirical Evidence from China’s High-Tech Sectors

This paper aims to explore the effects of market-oriented reforms on industrial technology progress.Based on a theoretical analysis,we performed an empirical study with a marketization index and panel data of high-tech sectors in China.We found that market-oriented reforms had significantly propelled technology progress in China’s high-tech sectors,and the effects became more evident after China’s WTO entry.Market-oriented reforms induced technology progress by increasing capital allocation efficiency,R&D input,and technology diffusion.Among various aspects of market-oriented reforms,the institutional environment exerted the most significant effects,followed by the economy’s non-state sector,product market development,and factor market development;the government-market relationship index influenced technology’s progress the least.The effects are heterogeneous across sectors with different technology attributes and more significant for technology-intensive sectors.Our findings offer policy implications for China’s ongoing market-oriented reforms and policy design for technology progress in high-tech sectors.

Research Progress and Prospects for the Evolution Process and Treatment Technology of Urban Black and Smelly Water

Water is an important material resource for human survival,and with the increasing development of society,the amount of urban industrial wastewater and domestic sewage is gradually increasing.However,wastewater collection and treatment facilities lag behind,so that a large number of wastewater enters urban water,making urban water become gradually black and smelly.In order to provide a good living environment for human beings,a large number of scholars actively explore the treatment technology of black and smelly water.In this paper,the evolution process of black and smelly water was introduced firstly,and then the treatment technology of black and smelly water was summarized.Finally,the prospects for the development of the treatment technology were put forward.

Progress in the Ultradeep Well Drilling Technology of SINOPEC

Ultra-deep formations in China contain rich hydrocarbon resources.In recent years,the number of ultradeep wells has been continuously increasing.However,efforts to facilitate tlte drilling and exploration of these ultra-deep reservoirs are facing many challenges,such as complicated formation pressures,complicated formation lithologic features,complicated formation fluids,difficulties in the accurate calculation of formation parameters,difficulties in borehole structure design optimization,instabilities in the performances of drilling fluid and key cementing materials/systems,high temperature-resistance and pressure-resistance requirements for downhole tools and instruments,complicated engineering problems,and slow drilling speeds.Under such circumstances,it is very difficult to ensure the performance of such drilling operations.In order to address these challenges,SINOPEC has developed relevant drilling technologies for ultra-deep wells in complicated geological conditions through intensive research on accurate descriptions of complex geologic characteristics,borehole structure design optimization,fast drilling techniques for deep and hard formations,temperature-resistant highdensity drilling fluid,anti-channeling cementing in high-pressure gas wells,borehole trajectory control in ultra-deep horizontal wells and other key technologies.These technologies can provide sound engineering and technical support for tlte exploration and development of hydrocarbon resources in ultra-deep formations in China.