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This study meticulously investigates the influential dynamics exerted by pit excavation on structures of adjacent underground tunnels, with a specialized focus on the resultant deformation effects attributed to the varying proximities separating the excavation sites from tunnel constructs. Employing rigorous model analyses conducted at designated intervals ranging from 8 meters to 24 meters, the research successfully elucidates a definitive and consistent pattern; it is observed that augmenting the distance between the pit and the tunnel significantly diminishes the extent of tunnel deformation experienced both in horizontal and vertical perspectives. This critical relationship unearthed by the study underlines the paramount importance of adopting meticulously calculated engineering design and the implementation of robust monitoring systems as fundamental measures in mitigating the associated risks prevalent within the expanse of urban underground construction endeavors. Noteworthy within these discoveries is the revelation that horizontal tunnel displacements, in comparison to their vertical counterparts, are markedly more pronounced in their reaction to alterations in the spatial gap that lies between the pit and the tunnel. This distinct sensitivity accentuated in the horizontal displacements signals the imperative for the formulation and application of customized mitigation strategies, specifically honed to address the asymmetrical nature of deformation induced by pit excavation activities in close quarters to tunnel infrastructures. Hence, these insights provide a valuable impetus for stakeholders in the field of construction engineering to incorporate such nuanced understandings into their projects, thereby enhancing the overall stability and safety of subterranean constructions within densely developed urban territories.

Water treatment stands as a crucial element in industrial engineering and urban planning, essential for fostering sustainable urban environments. This article offers an insightful examination of cutting-edge water treatment technologies and their role in urban development. It comprehensively reviews various advanced methods, including membrane filtration, advanced oxidation processes, and biological treatments, and discusses their integration into urban infrastructure. The article not only delves into the technical advancements but also considers the environmental benefits of these technologies, such as reducing water pollution and enhancing water recycling efforts. It also touches upon the economic impacts, highlighting cost-effectiveness and contributions to sustainable urban growth. Central to the discussion is the significance of embedding these water treatment solutions into urban planning initiatives. The study emphasizes the need for a cohesive approach where environmental sustainability, urban design, and community health are interlinked. It advocates for urban development that aligns technological progress with ecological balance, urging policymakers and planners to prioritize advanced water treatment in their urban strategies. In conclusion, the article underscores the necessity of integrating state-of-the-art water treatment techniques in urban planning for a sustainable and resilient future. This exploration aims to encourage ongoing research and dialogue in sustainable urban development and efficient water management.

In the current context of “peak carbon emissions and carbon neutral”, today’s society has put forward higher requirements for reducing building energy consumption. Therefore, to address the problems of high energy consumption and poor comfort of central air conditioning system in large public buildings, this paper proposes an energy-saving control method for fan coil unit based on auto-counting of people number to reduce the operating energy consumption of air conditioning system as much as possible while meeting the comfort of indoor personnel. It is concluded that the operation strategy can effectively reduce the operational energy consumption of the air conditioning system by 20%. It is applicable to the central air conditioning system of public buildings with large changes in the number of people, and has certain application prospects.

With the rapid growth of IDC (Internet Data Center) construction, the energy consumption is also increasing gradually. It is extremely important to design a reasonable air distribution to reduce the energy consumption of IDC. The research object is an IDC Plant in Beijing. Airpak software is used to conduct DeST ( Building energy consumption analysis software) simulation of the air flow organization in IDC room. Under the same cooling load conditions, through the simulation of the three types of diffuse air supply, closed cold aisle and closed hot aisle in the IDC room, it is concluded that the air flow organization after the closed cold and hot aisle is excellent. The energy consumption analysis of the enclosure structure of the three air flow organizations of IDC room shows that the energy consumption of the closed cold aisle is lower than that of the closed hot aisle air-conditioning system.

In order to meet the needs of humanistic education, museum buildings have developed vigorously in recent years. The protection and display of cultural relics is an effective way to continue historical information, which has important social and cultural significance. During the design and operation of the building air conditioning system, both the thermal and humidity environment of the cultural relics exhibition room should be responsible for the safety of the displayed cultural relics and the thermal comfort of visitors should be considered. In this paper, the indoor thermal and humidity environment of a cultural relic exhibition room in Beijing was measured, and the indoor air velocity distribution and temperature and humidity distribution were obtained. The results show that the thermal and humidity environment of the cultural relics exhibition room is better, but the indoor temperature of the exhibition room is lower, which still has great energy saving potential. It needs to be improved in the future engineering practice to achieve double optimization of comfort and energy saving effect. In order to achieve accurate control of the indoor thermal and humidity environment of the cultural relics exhibition room, we built a data collection for thermal environment parameters and air quality, which is used for monitoring and data collection of the cultural relics exhibition room.

In view of the shortcomings of the current green building evaluation system, this paper present a new evaluating index for the energy saving performance of low-energy green buildings: CEC, and this paper evaluated and analyzed the energy-saving performance of green building by using CEC index.

At present, COVID-19 is raging in many countries, which poses a great threat to people's life, health, social and economic development. Body temperature screening is very helpful for early detection of potential infected persons and blocking the spread of the epidemic. The paper mainly introduces the body temperature detection and data acquisition system, and designs a system with the function of non-contact temperature measurement and automatic data collection system. This system is suitable for the company or school where the flow of people is large and the temperature needs to be measured quickly, and upload information in real time.

Based on the multiple linear regression of the relevant data of 29 ships in the basic database, including cargo ship, oil ship, container ship and chemical ship, etc, the empirical estimation formula of resistance coefficient of single ship under different Fr was obtained. The feasibility of applying the above regression formula to the prediction of the resistance performance of the trimaran based on DTMB5415 is verified by comparison with CFD simulation data. This method has a strong engineering applicability and provides a new idea for the study of computer-aided layout optimization of the trimaran.

Rubidium atomic frequency standard (RAFS) is the most widely used frequency standard in space. The light used to pump the atoms and detect the resonance signal is emitted by rubidium spectrum lamp, so the light intensity of rubidium spectrum lamp directly determines the performance of RAFS. This paper discussed on-board RAFS’ output frequency fluctuations caused by rubidium spectrum lamp. The reason of frequency fluctuations from rubidium lamps was described. To obtain stable lamp light intensity, analysis and optimization of the lamp was developed. Relevant experiments were carried out to verify the optimization. The study content of this paper is beneficial to improve the performance of a single temperature controlled space RAFS physics package.

This paper extends recent investigations into risk contagion effects on stock markets to the Vietnamese stock market. Daily data spanning October 9, 2006 to May 3, 2012 are sourced to empirically validate the contagion effects between stock markets in Vietnam, and China, Japan, Singapore, and the US. To facilitate the validation of contagion effects with market-related coefficients, this paper constructs a bivariate EGARCH model of dynamic conditional correlation coefficients. Using the correlation contagion test and Dungey et al.’s (2005) contagion test, we find contagion effects between the Vietnamese and four other stock markets, namely Japan, Singapore, China, and the US. Second, we show that the Japanese stock market causes stronger contagion risk in the Vietnamese stock market compared to the stock markets of China, Singapore, and the US. Finally, we show that the Chinese and US stock markets cause weaker contagion effects in the Vietnamese stock market because of stronger interdependence effects between the former two markets.