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How does the improved DB mode degrade the complex integrity of infrastructure mega-projects? Evidence from the Hong Kong-Zhuhai-Macao Bridge project in China

Jinwen ZHANG, Yumin QIU

《工程管理前沿（英文）》 2018年第5卷第1期页码 40-51 doi: 10.15302/J-FEM-2018083

摘要： Complex integrity is one of the main characteristics of infrastructure mega-projects (IMPs). Cost, technology, risk, duration, environmental impact, and other uncertain complexities are interrelated and constitute a challenging and complex management problem. At present, there is no unified understanding of or solutions to these complex integrity problems. This study analyzes the complex integrity of the island-tunnel subproject of the Hong Kong-Zhuhai-Macao Bridge (HZMB) project and proposes an improved design-build (DB) mode in which the owner provides a preliminary design and has the right to form and manage consortium. This improved DB mode creatively degrades the special complexities that arise from multiple dimensions. On this basis, it is an efficacious way to grasp the main contradictions, integrate the effective resources, and degrade the complex integrity in multiple dimensions and at multiple levels so as to effectively deal with the complexity management of IMPs.

关键词： Hong Kong-Zhuhai-Macao Bridge project island-tunnel subproject complex integrity complexity degradation the general contracting mode of design-build the design-build consortium

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Determination of growth kinetics of microorganisms linked with 1,4-dioxane degradation in a consortium

《环境科学与工程前沿（英文）》 2022年第16卷第5期 doi: 10.1007/s11783-022-1567-y

摘要：

● Evaluated three methods for determining the consortia’s growth kinetics.

关键词： Biodegradation 1 4-Dioxane Kinetics Microbial consortium 16S rRNA

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Hyperledger fabric-based consortium blockchain for construction quality information management

Botao ZHONG, Haitao WU, Lieyun DING, Hanbin LUO, Ying LUO, Xing PAN

《工程管理前沿（英文）》 2020年第7卷第4期页码 512-527 doi: 10.1007/s42524-020-0128-y

摘要： Lack of trust has been an ongoing issue for decades in construction quality management, hindering the improvement of quality performance. The development of mutual trust depends on immutable, traceable, and transparent construction quality information records. However, current information technologies cannot meet the requirements. To address the challenge, this study explores a blockchain-based framework for construction quality information management, which extends applications of blockchain in the domain of construction quality management. A consortium blockchain system is designed to support construction quality management in which participants’ information permissions and lifecycle are discussed. Additionally, this study presents in detail the consensus process that aims to address the problem of information fraud. The automated compliance checking based on smart contracts is presented as well, aiming to assure that construction products meet regulation requirements. Finally, an example of the consortium blockchain network is visualized to validate the feasibility of blockchain-based construction quality information management. The research shows that blockchain can facilitate mutual trust in construction quality management by providing distributed, encrypted, and secure information records and supporting automated compliance checking of construction quality.

关键词： blockchain construction quality smart contracts compliance checking information management

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INTERCROPPING: FEED MORE PEOPLE AND BUILD MORE SUSTAINABLE AGROECOSYSTEMS

《农业科学与工程前沿（英文）》 2021年第8卷第3期页码 373-386 doi: 10.15302/J-FASE -2021398

摘要：

Intercropping is a traditional farming system that increases crop diversity to strengthen agroecosystem functions while decreasing chemical inputs and minimizing negative environmental effects of crop production. Intercropping is currently considerable interest because of its importance in sustainable agriculture. Here, we synthesize the factors that make intercropping a sustainable means of food production by integrating biodiversity of natural ecosystems and crop diversity. In addition to well-known yield increases, intercropping can also increase yield stability over the long term and increase systemic resistance to plant diseases, pests and other unfavorable factors (e.g. nutrient deficiencies). The efficient use of resources can save mineral fertilizer inputs, reduce environmental pollution risks and greenhouse gas emissions caused by agriculture, thus mitigating global climate change. Intercropping potentially increases above- and below-ground biodiversity of various taxa at field scale, consequently it enhances ecosystem services. Complementarity and selection effects allow a better understanding the mechanisms behind enhanced ecosystem functioning. The development of mechanization is essential for large-scale application of intercropping. Agroecosystem multifunctionality and soil health should be priority topics in future research on intercropping.

关键词： agroecosystems ， crop diversity ，intercropping，interspecific interactions，sustainable agriculture

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Utilizing big data to build personalized technology and system of diagnosis and treatment in traditional

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《医学前沿（英文）》 2014年第8卷第3期页码 272-278 doi: 10.1007/s11684-014-0364-9

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架起科学与经济之间的桥梁

Hans-Jurgen Warnecke

《中国工程科学》 2000年第2卷第10期页码 16-17

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构建工程管理专业队伍是我国工程管理当务之急

张寿荣

《中国工程科学》 2008年第10卷第12期页码 36-38

摘要：

对我国工程管理现状做了简要回顾，认为构建工程管理专业队伍是提升我国工程管理水平的当务之急，并提出培养专业队伍的具体建议。

关键词：工程管理构建专业队伍提升水平

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Build orientation determination of multi-feature mechanical parts in selective laser melting via multi-objective

《机械工程前沿（英文）》 2023年第18卷第2期 doi: 10.1007/s11465-022-0737-8

摘要： Selective laser melting (SLM) is a unique additive manufacturing (AM) category that can be used to manufacture mechanical parts. It has been widely used in aerospace and automotive using metal or alloy powder. The build orientation is crucial in AM because it affects the as-built part, including its part accuracy, surface roughness, support structure, and build time and cost. A mechanical part is usually composed of multiple surface features. The surface features carry the production and design knowledge, which can be utilized in SLM fabrication. This study proposes a method to determine the build orientation of multi-feature mechanical parts (MFMPs) in SLM. First, the surface features of an MFMP are recognized and grouped for formulating the particular optimization objectives. Second, the estimation models of involved optimization objectives are established, and a set of alternative build orientations (ABOs) is further obtained by many-objective optimization. Lastly, a multi-objective decision making method integrated by the technique for order of preference by similarity to the ideal solution and cosine similarity measure is presented to select an optimal build orientation from those ABOs. The weights of the feature groups and considered objectives are achieved by a fuzzy analytical hierarchy process. Two case studies are reported to validate the proposed method with numerical results, and the effectiveness comparison is presented. Physical manufacturing is conducted to prove the performance of the proposed method. The measured average sampling surface roughness of the most crucial feature of the bracket in the original orientation and the orientations obtained by the weighted sum model and the proposed method are 15.82, 10.84, and 10.62 μm, respectively. The numerical and physical validation results demonstrate that the proposed method is desirable to determine the build orientations of MFMPs with competitive results in SLM.

关键词： selective laser melting (SLM) build orientation determination multi-feature mechanical part (MFMP) fuzzy analytical hierarchy process multi-objective decision making (MODM)

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荟萃海内名师打造高速巨龙

朱龙驹

《中国工程科学》 2000年第2卷第9期页码 108-109

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生物医学工程——材料、器械和技术创新铸就美好未来

屠海令, 张兴栋

《工程（英文）》 2021年第7卷第12期页码 1653-1654 doi: 10.1016/j.eng.2021.10.005

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自主开发——强国之道

金履忠

《中国工程科学》 2005年第7卷第7期页码 1-6

摘要：

论证了自主开发在政治、军事、经济、安全、科技等方面的重大意义。建议用10～15年的时间，使我国的绝大多数产业具备自主开发和国际竞争能力；分析了实现这个目标是完全可能的。最后提出了应在思想观念、精神状态、法律法规、政策、体制、宣传舆论等方面创造有利于自主开发的环境。

关键词：自主开发的重要性实现的目标可能性营造自主开发的环境

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农村可持续发展能源战略对策与建议

邓可蕴,贺亮

《中国工程科学》 2000年第2卷第8期页码 43-54

摘要：

根据我国农村地区可持续发展的能源战略和建设方针，文章总结、分析了农村能源建设的经验。按照市场经济体制改革的形势，分阶段提出了农村地区能源资源节约、开发和综合利用等方面的战略重点和对策建议。并系统地探讨了县级农村能源综合建设的成功模式，指出了农村能源建设的发展方向。

关键词：农村能源技术政策综合建设模式

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建设现代农业推进农业科技创新与体制改革

卢良恕

《中国工程科学》 2008年第10卷第2期页码 4-6

摘要：

农业科技在现代农业建设的过程中发挥着重要作用。文章介绍了新时期现代农业的内涵、主要特点，指出农业科技创新是现代农业发展的强大支撑，农业科技体制改革是现代农业发展和服务“三农”的需要。

关键词：现代农业科技创新体制改革

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Surface accuracy optimization of mechanical parts with multiple circular holes for additive manufacturing based on triangular fuzzy number

Jinghua XU, Hongsheng SHENG, Shuyou ZHANG, Jianrong TAN, Jinlian DENG

《机械工程前沿（英文）》 2021年第16卷第1期页码 133-150 doi: 10.1007/s11465-020-0610-6

摘要： Surface accuracy directly affects the surface quality and performance of mechanical parts. Circular hole, especially spatial non-planar hole set is the typical feature and working surface of mechanical parts. Compared with traditional machining methods, additive manufacturing (AM) technology can decrease the surface accuracy errors of circular holes during fabrication. However, an accuracy error may still exist on the surface of circular holes fabricated by AM due to the influence of staircase effect. This study proposes a surface accuracy optimization approach for mechanical parts with multiple circular holes for AM based on triangular fuzzy number (TFN). First, the feature lines on the manifold mesh are extracted using the dihedral angle method and normal tensor voting to detect the circular holes. Second, the optimal AM part build orientation is determined using the genetic algorithm to optimize the surface accuracy of the circular holes by minimizing the weighted volumetric error of the part. Third, the corresponding weights of the circular holes are calculated with the TFN analytic hierarchy process in accordance with the surface accuracy requirements. Lastly, an improved adaptive slicing algorithm is utilized to reduce the entire build time while maintaining the forming surface accuracy of the circular holes using digital twins via virtual printing. The effectiveness of the proposed approach is experimentally validated using two mechanical models.

关键词： surface accuracy optimization multiple circular holes additive manufacturing (AM) part build orientation triangular fuzzy number (TFN) digital twins

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novel strategy for gas mitigation during swine manure odour treatment using seaweed and a microbial consortium

Madhavaraj Lavanya, Ho-Dong Lim, Kong-Min Kim, Dae-Hyuk Kim, Balasubramani Ravindran, Gui Hwan Han

《环境科学与工程前沿（英文）》 2020年第14卷第3期 doi: 10.1007/s11783-020-1230-4

摘要： Comprehensive mitigation of gas emissions from swine manure was investigated. Additives addition for mitigation of gas from the manure has been developed. Sargassum horneri, seaweed masking strategy controlled gas by 90%-100%. Immediate reduction in emitted gas and improving air quality has been determined. Microbial consortium with seaweed completely controlled gas emissions by 100%. Gas emissions from swine farms have an impact on air quality in the Republic of Korea. Swine manure stored in deep pits for a long time is a major source of harmful gas emissions. Therefore, we evaluated the mitigation of emissions of ammonia (NH3), hydrogen sulfide (H2S) and amine gases from swine manure with biological products such as seaweed (Sargassum horneri) and a microbial consortium (Bacillus subtilis (1.2 × 109 CFU/mL), Thiobacillus sp. (1.0 × 1010 CFU/mL) and Saccharomyces cerevisiae (2.0 × 109 CFU/mL)) used as additives due to their promising benefits for nutrient cycling. Overall, seaweed powder masking over two days provided notable control of over 98%-100% of the gas emissions. Furthermore, significant control of gas emissions was especially pronounced when seaweed powder masking along with a microbial consortium was applied, resulting in a gas reduction rate of 100% for NH3, amines and H2S over 10 days of treatment. The results also suggested that seaweed powder masking and a microbial consortium used in combination to reduce the gas emissions from swine manure reduced odour compared with that observed when the two additives were used alone. Without the consortium, seaweed decreased total volatile fatty acid (VFA) production. The proposed novel method of masking with a microbial consortium is promising for mitigating hazardous gases, simple, and environmentally beneficial. More research is warranted to determine the mechanisms underlying the seaweed and substrate interactions.

关键词： Seaweed Consortium Mitigation Ammonia H₂S Volatile fatty acids (VFAs)

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标题作者时间类型操作

How does the improved DB mode degrade the complex integrity of infrastructure mega-projects? Evidence from the Hong Kong-Zhuhai-Macao Bridge project in China

Jinwen ZHANG, Yumin QIU

期刊论文

Determination of growth kinetics of microorganisms linked with 1,4-dioxane degradation in a consortium

期刊论文

Hyperledger fabric-based consortium blockchain for construction quality information management

Botao ZHONG, Haitao WU, Lieyun DING, Hanbin LUO, Ying LUO, Xing PAN

期刊论文

INTERCROPPING: FEED MORE PEOPLE AND BUILD MORE SUSTAINABLE AGROECOSYSTEMS

期刊论文

Utilizing big data to build personalized technology and system of diagnosis and treatment in traditional

null

期刊论文