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Combined reticular blind drainage and vertical hierarchical drainage system for landfills located in

Wenjing LU,Zhonge FU,Yan ZHAO

《环境科学与工程前沿（英文）》 2016年 第10卷 第1期   页码 177-184 doi: 10.1007/s11783-014-0710-9

摘要： A novel water control technology that combines the features of a reticular blind drainage system and a vertical hierarchical drainage system is developed and applied in the Yanziyan Sanitary Landfill, which is located at an area (Loudi City, Hunan Province, China) with high rainfall and high groundwater level. The reticular blind drain system, which was installed on the bottom and side walls of the landfill site, can conveniently guide the flow of groundwater out of the site while preventing a disorganized flow of groundwater. The vertical hierarchical drainage system was installed to separate rainfall water and leachate in the landfill site, thus efficiently reducing the pressure of leachate treatment. The whole drainage system plays a key role in foundation stabilization by seepage control and separation and in the instant drainage of rainfall water. The leachate reduction efficiency of the drainage technology was calculated in terms of leachate production before (336519 m ) and after (29664 m ) technology application. Over 90% of leachate derived from rainfall water and groundwater inflow was avoided upon installation of the vertical hierarchical drainage and reticular blind drainage systems. The technology can thus be popularized and applied for water control in landfills located in areas with high rainfall and high groundwater level. The proposed technology can be used to alleviate the pressure of leachate treatment and to reduce the risk of instability.

关键词： landfill     reticular blind drain     vertical hierarchical drain     guidance and drainage     impermeable layer    

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交通流诱导系统实时方法研究

崔建明,叶怀珍

《中国工程科学》 2008年 第10卷 第10期   页码 64-66

摘要：

交通流的实时诱导系统多为建立在单位时间的信息重构，一旦在周期时间内事故发生，则造成行驶车辆正常诱导无法进行。通过对实际交通状况的分析，提出一个新的并且简单可行的解决方案。方案在原有系统中增加了对实时事件突发诱导系统的修正，减少系统应变时间。此方案是建立在现有的诱导基础之上的改进技术，可以在交通流诱导系统中大范围推广应用。

关键词： 交通流诱导系统     仿真     突发事件     实时诱导    

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Safety assessment for buried drainage box culvert under influence of underground connected aisle blasting

《结构与土木工程前沿（英文）》 2023年 第17卷 第2期   页码 191-204 doi: 10.1007/s11709-022-0906-1

摘要： Blasting engineering in complex urban environments is considered to influence the safety and stability of the overlying drainage box culvert structure owing to vibration. Therefore, field blasting and vibration tests were performed on the blasting engineering of the Wuhan Metro Line 8 connected aisle, and the LS-DYNA software was used to analyze the dynamic response characteristics of an underground drainage box culvert during the blasting test. The vibration response evolution law of the buried drainage box culvert under blasting vibration was investigated, and a safe surface control standard for the blast vibration of a drainage box culvert is proposed. The results reveal that the maximum tensile stress of the box culvert structure was 0.33 MPa. The peak particle velocity (PPV) and peak tensile stress (PTS) of the drainage box culvert decreased as the water level in the box culvert increased. Based on the relationship between the tensile stress of the box culvert, PPV of the box culvert, and PPV of the surface, it is proposed that the surface control velocity of the buried drainage box culvert is 1.36 cm/s.

关键词： drainage box culvert     underpass blasting     dynamic response     numerical simulation     safety assessment    

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Design and evaluation of control strategies in urban drainage systems in Kunming city

Xin Dong, Senchen Huang, Siyu Zeng

《环境科学与工程前沿（英文）》 2017年 第11卷 第4期 doi: 10.1007/s11783-017-0968-9

摘要： Real time control (RTC) of urban drainage systems (UDSs) is an important measure to reduce combined sewer overflow (CSO) and urban flooding, helping achieve the aims of ‘Sponge City’. Application of RTC requires three main steps: strategy design, simulation-based evaluation and field test. But many of published RTC studies are system-specific, lacking discussions on how to design a strategy step by step. In addition, the existing studies are prone to use hydrologic model to evaluated strategies, but a more precise and dynamic insight into strategy performance is needed. To fill these knowledge gaps, based on a case UDS in Kunming city, a study on RTC strategy design and simulation-based evaluation is performed. Two off-line volume-based RTC strategy design principles, and , are emphasized. Following these principles, a detailed design procedure is shown for the case UDS resulting in three RTC strategies: static, constant and equal filling. The proposed strategies are evaluated based on a hydrodynamic model- Storm Water Management Model (SWMM) - under four typical rainfall events characterized by different return periods (1-year or 0.5 year) and different spatial distributions (uniform or uneven). The equal filling strategy outperforms other two strategies and it can achieve 10% more CSO reduction and 5% more flooding reduction relative to the no-tank case.

关键词： Urban drainage system     Real time control     Static strategy     Constant strategy     Equal filling strategy    

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Construction of the vessel-collateral theory and its guidance for prevention and treatment of vasculopathy

Yiling Wu

《医学前沿（英文）》 2011年 第5卷 第2期   页码 118-122 doi: 10.1007/s11684-011-0140-z

摘要： According to the self-discipline of traditional Chinese medicine, vessel-collateral theory was constructed systematically, which was important to improving prevention and treatment level of vasculopathy. The hypothesis of “homeostasis ( ), compensatory auto-adaptation ( ), regulation ( ) and equilibrium ( )” based on the “qi–yin-yang–five elements” coupled with the (nutrients)- (defense) theory, has become the core content of the vessel-collateral theory. Clinical and laboratory trials have been developed to further confirm the scientific connotations of the hypothesis, such as capsule, as the representative drugs of vessel collateral theory, showed good efficacy in protecting the vascular endothelium, stabilizing the vulnerable plaque and reducing the blood vessel spasm. “Sou, ti, shu, tong” was the characteristics of capsule in treating “microvascular damage” as the core mechanism of acute myocardial infarction, cerebral infarction and microvascular complications of diabetes. capsules in the treatment of arrhythmia have made integrated adjustment advantage. capsules have been made treating both manifestation and root cause of chronic heart failure. These research have improved prevention and treatment level of major vascular system diseases.

关键词： vessel-collateral theory     vasculopathy     prevention and treatment    

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Online recognition of drainage type based on UV-vis spectra and derivative neural network algorithm

《环境科学与工程前沿（英文）》 2021年 第15卷 第6期 doi: 10.1007/s11783-021-1430-6

摘要：

• UV-vis absorption analyzer was applied in drainage type online recognition.

关键词： Drainage online recognition     UV-vis spectra     Derivative spectrum     Convolutional neural network    

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Substance flow analysis for an urban drainage system of a representative hypothetical city in China

Hua BAI, Siyu ZENG, Xin DONG, Jining CHEN

《环境科学与工程前沿（英文）》 2013年 第7卷 第5期   页码 746-755 doi: 10.1007/s11783-013-0551-y

摘要： This paper discusses the use of substance flow analysis (SFA) as a tool to support quantified research on urban drainage systems. Based on the principle of mass balance, a static substance flow model is established to describe and examine the routes and intensities of water, chemical oxygen demand (COD), total nitrogen (TN) and total phosphorus (TP) for a representative hypothetical city (RH city) in China, which is a devised and scaled city using statistical characteristics of urban circumstances at the national level. It is estimated that the annual flux of water, COD, TN and TP through the urban drainage system in 2010 was 55.1 million m , 16037.3 t, 1649.5 t and 209.7 t, respectively. The effluent of wastewater treatment plant (WWTP) was identified as the most important pathway for pollutant emissions, which contributed approximately 60% of COD, 65% of TN and 50% of TP to receiving water. During the wastewater treatment process, 1.0 million m , 7042.5 t, 584.2 t and 161.4 t of the four studied substances had been transmitted into sludge, meanwhile 3813.0 t of COD and 394.0 t of TN were converted and emitted to the atmosphere. Compared with the representative hypothetical city of 2000, urban population and the area of urban built districts had expanded by approximately 90% and 80% respectively during the decade, resulting in a more than threefold increase in the input of substances into the urban drainage system. Thanks to the development of urban drainage systems, the total loads of the city were maintained at a similar level.

关键词： substance flow analysis (SFA)     urban drainage system     representative hypothetical city (RH city)     water pollution control    

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飞航导弹双平面纵向综合制导技术

孙明玮,刘丽,杨明

《中国工程科学》 2007年 第9卷 第9期   页码 52-57

摘要：

根据飞航导弹对面攻击的需要， 针对可以获取的信息，设计了视线角信息 框架下的双平面导引规律，以实现指定入射角的攻击，并从理论上进行了分析。以 此为基础，考虑到弹体和控制回路的特性， 完成了一种便于工程实施的综合制导律， 改善了制导性能。通过充分利用飞航导弹 中制导阶段的弹道特性，解决了计算弹道 倾角时光滑低延迟垂速获取的难题。数学 仿真结果显示了所设计方法的有效性。

关键词： 飞航导弹     视线角     约束导引     综合制导    

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radionuclide hepatobiliary scintigraphy in combination with determination of bilirubin from duodenal drainage

Sheng-Xuan LIU, Zhi-Hua HUANG

《医学前沿（英文）》 2010年 第4卷 第3期   页码 342-345 doi: 10.1007/s11684-010-0099-1

摘要： The aim of this study was to investigate the value of technetium etifenin injection ( Tc-EHIDA) hepatobiliary scintigraphy in combination with determination of bilirubin from duodenal drainage in differential diagnosis between infantile hepatitis syndrome and biliary atresia. Tc-EHIDA hepatobiliary scintigraphy in combination with duodenal fluid examination was used for evaluation in 84 infants with persistent infantile jaundice. For diagnosing biliary atresia, the sensitivity and specificity of scintigraphy were 100% and 74.5%, respectively; the sensitivity and specificity of scintigraphy in combination with duodenal fluid examination were 100% and 100%, respectively. In conclusion, hepatobiliary scintigraphy, which is a noninvasive, safe, valuable examination method, in combination with examination of duodenal fluid, is of value for the differential diagnosis between infantile hepatitis syndrome and biliary atresia.

关键词： jaundice     radionuclide hepatobiliary scintigraphy     duodenal drainage    

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Strategic Guidance Effect of Large-Scale Construction Enterprise Growth to Programme Contracting

Feng Guo,Yi-qi Chen,Yi-qing Cai

《工程管理前沿（英文）》 2016年 第3卷 第3期   页码 246-251 doi: 10.15302/J-FEM-2016034

摘要： In the case of single project management standing the major place, the management on the organizational level and project level is separated from each other in large-scale construction enterprises, and it is not long before program management theories applied to construction industry. Under the new situation of construction project clustering, how to choose projects has been the strategic decision for construction enterprises. Therefore, with the theory of program management and strategic management, this paper analyzes the relationship between the strategic growth of large-scale construction enterprises and program contracting, and attempts to provide meaningful ideas for enterprises to choose program from the strategic level.

关键词： large-scale construction enterprise     enterprise growth     programme contracting     strategic interaction    

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Life cycle cost savings analysis on traditional drainage systems from low impact development strategies

Pengfei ZHANG, Samuel T. ARIARATNAM

《工程管理前沿（英文）》 2021年 第8卷 第1期   页码 88-97 doi: 10.1007/s42524-020-0063-y

摘要： Areas that are covered with natural vegetation have been converted into asphalt, concrete, or roofed structures and have increased surface impermeability and decreased natural drainage capability. Conventional drainage systems were built to mimic natural drainage patterns to prevent the occurrence of waterlogging in developed sites. These drainage systems consist of two major components: 1) a stormwater conduit system, and 2) a runoff storage system. Runoff storage systems contain retention basins and drywells that are used to store and percolate runoff, whereas conduit systems are combination of catch basins and conduit pipes used to collect and transport runoff. The construction of these drainage systems is costly and may cause significant environmental disturbance. In this study, low impact development (LID) methods that consist of extensive green roofs (GRs) and permeable interlocking concrete pavements (PICPs) are applied in real-world construction projects. Construction project documents were reviewed, and related cost information was gathered through the accepted bidding proposals and interviews of specialty contractors in the metropolitan area of Phoenix, Arizona. Results indicate that the application of both LID methods to existing projects can save an average of 27.2% in life cycle costs (LCC) for a 50-year service life and 18.7% in LCC for a 25-year service life on the proposed drainage system, respectively.

关键词： low impact development     traditional drainage system     hydraulic benefits     life-cycle cost    

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Pollutant reduction effectiveness of low-impact development drainage system in a campus

Shuhan Zhang, Yingying Meng, Jiao Pan, Jiangang Chen

《环境科学与工程前沿（英文）》 2017年 第11卷 第4期 doi: 10.1007/s11783-017-0969-8

摘要： Building a rainwater system based on the idea of low-impact development (LID) is an important aspect of the current “sponge city” construction in China. The “sponge city” concept emphasizes that the runoff can permeate the soil or be stored temporarily, and rainwater could be used again when it is needed. Beijing is one of the earliest cities to study rainwater harvesting and LID techniques in China. Through long-term monitoring of rainfall, runoff flow, and water quality of a campus demonstration project in Beijing, the runoff quantity and pollutant concentration variations have been analyzed. Furthermore, the runoff reduction effects of single LID measure, such as green roof, filtration chamber, and permeable pavement, have been investigated. Additionally, the overall reduction effectiveness of the LID system on the average annual rainfall runoff and pollution load has been discussed. Preliminary studies suggest that runoff pollutant concentration is positively correlated with the rainfall interval time, and the longer rainfall interval time leads to higher runoff pollutant concentrations. The very good outflow quality of the rainwater harvesting system could satisfy the reclaimed water quality standard for scenic entertainment use. The non-point-source pollution reduction effects of the LID system are obvious because the pollutants could be removed by filtration on the one hand and the pollution load could be reduced because of the significantly reduced outflow on the other hand.

关键词： Low-impact development     Rainwater harvesting     Non-point-source pollution reduction     Campus    

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城市排水系统的现代观

张杰

《中国工程科学》 2001年 第3卷 第10期   页码 33-35

摘要：

在当今水环境劣化趋势日益严峻，水资源日益短缺的势态下，在污水深度处理、超深度处理和回收利用已经实用化了的今日，排水系统不应仅仅是排除雨水、污水及保护城市环境和公共水域水质的基础设施，更应升华为维系城市健康水循环和良好水环境，实现水资源可持续利用的人类社会的生命线工程。城市污水作为可贵的淡水资源已为世人所瞩目。文章阐述了在排水系统功能、规划和设计方面的新构想和新观念。

关键词： 排水系统功能     水循环     水环境    

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宜万铁路岩溶隧道防排水原则及技术研究

王秀英,谭忠盛,王梦恕,张民庆

《中国工程科学》 2010年 第12卷 第8期   页码 107-112

摘要：

宜万铁路岩溶隧道地质条件复杂、岩溶形态多样，高压富水溶腔段是岩溶隧道治理的重点和难点。在对充填型溶腔进行富水分级的基础上，制定岩溶隧道的防排水原则。对于可以排放的溶腔，研究总结了使岩溶水的排放得到合理控制的总体方案和安全保障方案。对于采用“以堵为主”原则进行处理的高压富水充填岩溶，研究总结了相应的全断面帷幕注浆技术、隧道周边超前预注浆技术，并提出了外堵内固周边注浆新技术，在保证安全的前提下极大地加快了施工进度。宜万铁路岩溶隧道的结构防排水按照“因地制宜、堵排结合、多道防线”的原则进行。

关键词： 岩溶隧道     防排水     原则     注浆技术    

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Sustainability of urban drainage management: a perspective on infrastructure resilience and thresholds

Xiong NING, Yi LIU, Jining CHEN, Xin DONG, Wangfeng LI, Bin LIANG

《环境科学与工程前沿（英文）》 2013年 第7卷 第5期   页码 658-668 doi: 10.1007/s11783-013-0546-8

摘要： Urban wastewater infrastructures have been threatened by natural and socioeconomic disturbances. This study investigates infrastructure resilience against the risks of long-term changes rather than natural disasters. Urban expansion that leads to an increased urban runoff and massive population movements that cause fluctuations in domestic emissions are considered in this study. Pollution permits for water bodies are adopted as constraints on wastewater infrastructures. A land use-based accounting method, combined with a grid-based database, is developed to map domestic discharge and urban runoff to service areas of wastewater treatment plants. The results of a case study on downtown Sanya, the most famous seashore tourist attraction in China, show that the average resilient values of three sub-catchment areas in 2010 were -0.57, 0.10 and 0.27, respectively, a significant spatial variation. The infrastructure in the Sanya River sub-region is the least flexible, and is more likely to fail due to unstable inflows. The resiliencies will increase to 0.59, 1.01 and 0.54, respectively, in 2020, a considerable improvement in robustness. The study suggests that infrastructure resilience needs to be taken into further consideration for urban planning and the related realm of urban governance to foster more robust wastewater management under various risks.

关键词： wastewater infrastructure     land use     environmental carrying capacity     fluctuating population     urban runoff    

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标题 作者 时间 类型 操作

Combined reticular blind drainage and vertical hierarchical drainage system for landfills located in

Wenjing LU,Zhonge FU,Yan ZHAO

期刊论文

交通流诱导系统实时方法研究

崔建明,叶怀珍

期刊论文

Safety assessment for buried drainage box culvert under influence of underground connected aisle blasting

期刊论文

Design and evaluation of control strategies in urban drainage systems in Kunming city

Xin Dong, Senchen Huang, Siyu Zeng

期刊论文

Construction of the vessel-collateral theory and its guidance for prevention and treatment of vasculopathy

Yiling Wu

期刊论文

Online recognition of drainage type based on UV-vis spectra and derivative neural network algorithm

期刊论文

Substance flow analysis for an urban drainage system of a representative hypothetical city in China

Hua BAI, Siyu ZENG, Xin DONG, Jining CHEN

期刊论文

飞航导弹双平面纵向综合制导技术

孙明玮,刘丽,杨明

期刊论文

radionuclide hepatobiliary scintigraphy in combination with determination of bilirubin from duodenal drainage

Sheng-Xuan LIU, Zhi-Hua HUANG

期刊论文

Strategic Guidance Effect of Large-Scale Construction Enterprise Growth to Programme Contracting

Feng Guo,Yi-qi Chen,Yi-qing Cai

期刊论文

Life cycle cost savings analysis on traditional drainage systems from low impact development strategies

Pengfei ZHANG, Samuel T. ARIARATNAM

期刊论文

Pollutant reduction effectiveness of low-impact development drainage system in a campus

Shuhan Zhang, Yingying Meng, Jiao Pan, Jiangang Chen

期刊论文

城市排水系统的现代观

张杰

期刊论文

宜万铁路岩溶隧道防排水原则及技术研究

王秀英,谭忠盛,王梦恕,张民庆

期刊论文

Sustainability of urban drainage management: a perspective on infrastructure resilience and thresholds

Xiong NING, Yi LIU, Jining CHEN, Xin DONG, Wangfeng LI, Bin LIANG

期刊论文