Most cited articles
2002, 24(2):61-65.
DOI: 10.11835/j.issn.1674-4764.2002.02.015
Abstract:
Through the discussion from a view different from the traditional, the correlations between UV 254 and organic matter monitoring parameters in the field of water supply and wastewater treatment was discussed, such as TOC, DOC and THMs precursors. According to the explanation of applicability in this paper, UV 254 can be used as a surrogate parameter. The measurement of UV 254 as a surrogate parameter has several advantages, such as inexpensive instrument, convenient operation, low operating costs, good correlations to the parameters surrogated, high accuracy and excellent data reappearance in multiple measurements. The application of UV 254 as an indirect parameter is quite valuable, especially under the current financial level of the operation and monitoring of the water and wastewater treatment plants and the laboratory research in China.
Through the discussion from a view different from the traditional, the correlations between UV 254 and organic matter monitoring parameters in the field of water supply and wastewater treatment was discussed, such as TOC, DOC and THMs precursors. According to the explanation of applicability in this paper, UV 254 can be used as a surrogate parameter. The measurement of UV 254 as a surrogate parameter has several advantages, such as inexpensive instrument, convenient operation, low operating costs, good correlations to the parameters surrogated, high accuracy and excellent data reappearance in multiple measurements. The application of UV 254 as an indirect parameter is quite valuable, especially under the current financial level of the operation and monitoring of the water and wastewater treatment plants and the laboratory research in China.
2003, 25(1):17-23.
DOI: 10.11835/j.issn.1674-4764.2003.01.004
Abstract:
危岩崩塌是三峡库区主要的地质灾害类型之一，本文将危岩的运动过程明确的分为初始运动过程，碰撞过程，滑动过程和滚动过程四个阶段，获取各个阶段运动轨迹方程，运用工程实例验证它的适用性。
危岩崩塌是三峡库区主要的地质灾害类型之一，本文将危岩的运动过程明确的分为初始运动过程，碰撞过程，滑动过程和滚动过程四个阶段，获取各个阶段运动轨迹方程，运用工程实例验证它的适用性。
2000, 22(5):95-101.
DOI: 10.11835/j.issn.1674-4764.2000.05.020
Abstract:
The immobilization cell technology is a new biological engineering technique. The key for this technology is the characteristics of the immobilization supporter materials used. In this work, the categories and characteristics of the supporter materials in this technology are presented. The applications of the immobilization supporter materials in environmental pollutant treatment are also reviewed.
The immobilization cell technology is a new biological engineering technique. The key for this technology is the characteristics of the immobilization supporter materials used. In this work, the categories and characteristics of the supporter materials in this technology are presented. The applications of the immobilization supporter materials in environmental pollutant treatment are also reviewed.
2001, 23(4):75-80.
DOI: 10.11835/j.issn.1674-4764.2001.04.015
Abstract:
Development Management (DM) in decision phase, Project Management on behalf of the owner (OPM) in implementation phase and Facility Management (FM) in operation phase are three isolated management tools during traditional life cycle management of construction project. As a result, a lot of potential disadvantages are aroused. In recent years, many research organizations try to reform the traditional method using different integration means. This paper tries to explore into integration of DM, OPM and FM to overcome the malpractice of traditional life cycle management of construction project. The research focuses on three aspects: 1.putting forward the concept of Life Cycle Integrated Management (LCIM), based on management integration theory; 2. Raising a new idea to owner's (operator's) management organization design, which emphasizes on the balance of life cycle objectives; 3. Analyzing an information module, level and method of system integration of Life Cycle Integrated Management Information System.
Development Management (DM) in decision phase, Project Management on behalf of the owner (OPM) in implementation phase and Facility Management (FM) in operation phase are three isolated management tools during traditional life cycle management of construction project. As a result, a lot of potential disadvantages are aroused. In recent years, many research organizations try to reform the traditional method using different integration means. This paper tries to explore into integration of DM, OPM and FM to overcome the malpractice of traditional life cycle management of construction project. The research focuses on three aspects: 1.putting forward the concept of Life Cycle Integrated Management (LCIM), based on management integration theory; 2. Raising a new idea to owner's (operator's) management organization design, which emphasizes on the balance of life cycle objectives; 3. Analyzing an information module, level and method of system integration of Life Cycle Integrated Management Information System.
2002, 24(2):109-115.
DOI: 10.11835/j.issn.1674-4764.2002.02.025
Abstract:
In the last decade, with the development of environmental science, the studies on water quality models have developed rapidly at home and abroad. The water quality models are mainly used for simulating, assessing and predicting water quality and expounding the transport and transformation of pollutants in aquatic environment, the common models in literature such as fugacity approach, transport model of pollutants in multimedia environment, pollutant exposure model, and water quality management model and so on are discussed. The current situation, history and future trend of the research on aquatic environmental model are summarized. The theories, methodology and application problems which are involved with in this field are analyzed. Several leading objects for study are advanced also in this paper.
In the last decade, with the development of environmental science, the studies on water quality models have developed rapidly at home and abroad. The water quality models are mainly used for simulating, assessing and predicting water quality and expounding the transport and transformation of pollutants in aquatic environment, the common models in literature such as fugacity approach, transport model of pollutants in multimedia environment, pollutant exposure model, and water quality management model and so on are discussed. The current situation, history and future trend of the research on aquatic environmental model are summarized. The theories, methodology and application problems which are involved with in this field are analyzed. Several leading objects for study are advanced also in this paper.
2001, 23(1):114-117.
DOI: 10.11835/j.issn.1674-4764.2001.01.025
Abstract:
The structure characteristics of natural zeolite and its application in water treatment were discussed. Some suggestions were presented for further research.
The structure characteristics of natural zeolite and its application in water treatment were discussed. Some suggestions were presented for further research.
2000, 22(4):6-12.
Abstract:
In this paper, a back propagation network, a Hopfield network, Fuzzy comprehensive index method and classification of gray are compared in application for water quality assessment. The comparison result shows that the BP network is the best one of these four methods.
In this paper, a back propagation network, a Hopfield network, Fuzzy comprehensive index method and classification of gray are compared in application for water quality assessment. The comparison result shows that the BP network is the best one of these four methods.
1996, 18(3):116-122.
DOI: 10.11835/j.issn.1674-4764.1996.03.018
Abstract:
This paper presents objectives of study of grey system and the GM(1,1)grey forecast model is introduced.A new forecasting method was introduced which combined merits of both grey GM(1,1)forecast and Markov forecast overcome their shortcomings and increased precision of forecast.Finaly, an example for application was given.
This paper presents objectives of study of grey system and the GM(1,1)grey forecast model is introduced.A new forecasting method was introduced which combined merits of both grey GM(1,1)forecast and Markov forecast overcome their shortcomings and increased precision of forecast.Finaly, an example for application was given.
1999, 21(5):21-26.
DOI: 10.11835/j.issn.1674-4764.1999.05.004
Abstract:
This paper introduces the importance of developing the Ground-Source Heat pump and describes the prospects of it.with the method used abroad to acquire the temperature profiles within surrounding soil of the underground heat exchanger with buried tubes, in this paper the line heat source theory and thermal resistance network analysis method were used to set up the heat transfer model.The original temperature of the ground is determined by calculation and is compared with test results. Experiments of running single tube and running three series connection tubes are carried out on the built underground exchangers of vertical buried tube type.And the data which can provide reference for the Ground-Soure Heat pump technique are acquired.
This paper introduces the importance of developing the Ground-Source Heat pump and describes the prospects of it.with the method used abroad to acquire the temperature profiles within surrounding soil of the underground heat exchanger with buried tubes, in this paper the line heat source theory and thermal resistance network analysis method were used to set up the heat transfer model.The original temperature of the ground is determined by calculation and is compared with test results. Experiments of running single tube and running three series connection tubes are carried out on the built underground exchangers of vertical buried tube type.And the data which can provide reference for the Ground-Soure Heat pump technique are acquired.
2006, 28(5):90-96105.
DOI: 10.11835/j.issn.1674-4764.2006.05.022
Abstract:
ANSYS has become an effective tool for finite element analysis of masonry structure, but there is few common conclusions for reference. According to the characteristics of ANSYS and the essence of the analysis, some key problems in finite element analysis of masonry structure with ANSYS, such as structural modelling, material constitution, the damage criterion, iterative algorithm, convergence criterion, simulation of prestressing force and so on, are discussed in this paper. Based on the test results of typical masonry structures, the applicability of ANSYS to masonry structural analysis is studied and some suggestions for the application of ANSYS are presented.
ANSYS has become an effective tool for finite element analysis of masonry structure, but there is few common conclusions for reference. According to the characteristics of ANSYS and the essence of the analysis, some key problems in finite element analysis of masonry structure with ANSYS, such as structural modelling, material constitution, the damage criterion, iterative algorithm, convergence criterion, simulation of prestressing force and so on, are discussed in this paper. Based on the test results of typical masonry structures, the applicability of ANSYS to masonry structural analysis is studied and some suggestions for the application of ANSYS are presented.
2000, 22(5):90-94.
DOI: 10.11835/j.issn.1674-4764.2000.05.019
Abstract:
PFI is one of the novel approaches for the private finance in public works. The initiative aims on encouraging the private sector to undertake infrastructure projects and the provision of services on a project basis, rather than by the traditional means of procurement. PFI has been widely applied in a large number of fields in public works of government. PFI has become one of the government's main instruments for delivering higher quality and more effective public services. Two of the principal tenets of PFI is: the first is to secure value for money for the public sectors and the second to transfer the ongoing risk in the continued delivery of a service away from the public sector to the private sector.
PFI is one of the novel approaches for the private finance in public works. The initiative aims on encouraging the private sector to undertake infrastructure projects and the provision of services on a project basis, rather than by the traditional means of procurement. PFI has been widely applied in a large number of fields in public works of government. PFI has become one of the government's main instruments for delivering higher quality and more effective public services. Two of the principal tenets of PFI is: the first is to secure value for money for the public sectors and the second to transfer the ongoing risk in the continued delivery of a service away from the public sector to the private sector.
2002, 24(3):10.
DOI: 10.11835/j.issn.1674-4764.2002.03.003
Abstract:
Building roof garden can widen the green area and expand the green space effectively.It has the ecological function for improving the environment, beautification function for molding a person's sentiment and colorful practical function. It can promote the ecological balance of the city and optimize the environment for human residence to meet the needs of people to approach the nature and return to the nature. In designing roof garden, the favorite factors, such as wide field of vision, good illumination, large temperature difference, little pollution, small people flow as well as adverse factors concerning the field, bearing capacity, soil and wind power should be taken into account. In the meantime, to create an outer ecological space with abundant cultural connotation, it is necessary to take safety as prerequisite, ecology as basis,artistic quality as its core, function as its purpose and economy as its guarantee.
Building roof garden can widen the green area and expand the green space effectively.It has the ecological function for improving the environment, beautification function for molding a person's sentiment and colorful practical function. It can promote the ecological balance of the city and optimize the environment for human residence to meet the needs of people to approach the nature and return to the nature. In designing roof garden, the favorite factors, such as wide field of vision, good illumination, large temperature difference, little pollution, small people flow as well as adverse factors concerning the field, bearing capacity, soil and wind power should be taken into account. In the meantime, to create an outer ecological space with abundant cultural connotation, it is necessary to take safety as prerequisite, ecology as basis,artistic quality as its core, function as its purpose and economy as its guarantee.
1996, 18(2):20-33.
DOI: 10.11835/j.issn.1674-4764.1996.02.003
Abstract:
In this paper, the total input earthquake energy and influencing effects for shear type,shear-bending type, bending type aseismic structures of the single freedom system and multiple freedom elastic-plastic system are analyzed by synthesizing various effects and employing the timehistory analysis method. Based on the analysis results, the total input earthquake energy spectrum is presented.The simplified methods for analyzing the total input energy of multiple freedom elastic-plastic systems are proposed to provide some basis for developing aseismic structure design method and Double-Failure Criteria.
In this paper, the total input earthquake energy and influencing effects for shear type,shear-bending type, bending type aseismic structures of the single freedom system and multiple freedom elastic-plastic system are analyzed by synthesizing various effects and employing the timehistory analysis method. Based on the analysis results, the total input earthquake energy spectrum is presented.The simplified methods for analyzing the total input energy of multiple freedom elastic-plastic systems are proposed to provide some basis for developing aseismic structure design method and Double-Failure Criteria.
1999, 21(2):79-83.
DOI: 10.11835/j.issn.1674-4764.1999.02.017
Abstract:
Based on the lots of date come from the experiments and field tests,this paper reviewed the study of engineering properties of the soft _ soil; some engineering properties of the dredger fill were analyzed and summed up and compared with the natural soft _ soil's.Finally,itpointed out that the dredger fill is inferior to the natural soft _ soil about their engineering properties,but its condition of improvement is better.
Based on the lots of date come from the experiments and field tests,this paper reviewed the study of engineering properties of the soft _ soil; some engineering properties of the dredger fill were analyzed and summed up and compared with the natural soft _ soil's.Finally,itpointed out that the dredger fill is inferior to the natural soft _ soil about their engineering properties,but its condition of improvement is better.
2002, 24(3):106-111.
DOI: 10.11835/j.issn.1674-4764.2002.03.023
Abstract:
The treatment parameters in municipal treatment plant include COD, BOD5, SS, N and P etc. The paradoxical relationships are inevitably produced because of the different requirements on denitrification and phosphor removal. In this paper, the fundamental mechanism of biological denitrification and phosphor removal and their present situation and progress are presented. On the basis of analysis on the paradoxical relationship between biological denitrification and phosphor removal, the development of denitrification and phosphor removal process was discussed and the further study in this field was proposed.
The treatment parameters in municipal treatment plant include COD, BOD5, SS, N and P etc. The paradoxical relationships are inevitably produced because of the different requirements on denitrification and phosphor removal. In this paper, the fundamental mechanism of biological denitrification and phosphor removal and their present situation and progress are presented. On the basis of analysis on the paradoxical relationship between biological denitrification and phosphor removal, the development of denitrification and phosphor removal process was discussed and the further study in this field was proposed.
1999, 21(4):106-111.
DOI: 10.11835/j.issn.1674-4764.1999.04.023
Abstract:
This paper introduces the current status and development of modeling of the underground heat exchanger for a GSHP and several typical models used abroad are provided in details.
This paper introduces the current status and development of modeling of the underground heat exchanger for a GSHP and several typical models used abroad are provided in details.
2004, 26(4):126-130.
DOI: 10.11835/j.issn.1674-4764.2004.04.028
Abstract:
At present, Fenton oxidation process attracts more and more attention, especially in the field of wastewater treatment. In this paper, the development of Fenton oxidation used in degradation of dyes was reviewed as follows: the mechanism of Fenton's reaction, application of Fenton oxidation process in degradation of dyes, application of Fenton oxidation process in combination of other methods for degradation of dyes and the future of Fenton oxidation process.
At present, Fenton oxidation process attracts more and more attention, especially in the field of wastewater treatment. In this paper, the development of Fenton oxidation used in degradation of dyes was reviewed as follows: the mechanism of Fenton's reaction, application of Fenton oxidation process in degradation of dyes, application of Fenton oxidation process in combination of other methods for degradation of dyes and the future of Fenton oxidation process.
2005, 27(3):89-92.
DOI: 10.11835/j.issn.1674-4764.2005.03.034
Abstract:
In this paper, the influences of different kinds and different amount of mineral admixture to Cl-penetration and diffusion in concrete are studied. The results of experiment show that separate addition of mineral admixture (ground fly ash, slag fines, silica fume) into concrete can improve its resistance to chloride ion penetration and diffusion. Furthermore,the effect of silica fume is the best, fly ash second, and then follows slag fines. Mechanism analysis shows that the pozzolanic effect of mineral admixture improves the interface between the cement and aggregate in concrete, reduces the total porosity, makes pores more smaller, on the other hand it increases the Cl-consolidation capability of concrete with low alkaline C-S-H gel produced. So the resistance to chloride ion penetration of concrete is improved.
In this paper, the influences of different kinds and different amount of mineral admixture to Cl-penetration and diffusion in concrete are studied. The results of experiment show that separate addition of mineral admixture (ground fly ash, slag fines, silica fume) into concrete can improve its resistance to chloride ion penetration and diffusion. Furthermore,the effect of silica fume is the best, fly ash second, and then follows slag fines. Mechanism analysis shows that the pozzolanic effect of mineral admixture improves the interface between the cement and aggregate in concrete, reduces the total porosity, makes pores more smaller, on the other hand it increases the Cl-consolidation capability of concrete with low alkaline C-S-H gel produced. So the resistance to chloride ion penetration of concrete is improved.
2004, 26(5):82-85.
DOI: 10.11835/j.issn.1674-4764.2004.05.018
Abstract:
Improvement of building energy efficiency, as a part of sustainable development strategy, makes great contribution to global environmental protection and energy security. Presented in this paper are: the history of energy conservation, a comprehensive overview of the technological options for building energy conservation, measures taken to improve building energy efficiency and some suggestions suitable for China.
Improvement of building energy efficiency, as a part of sustainable development strategy, makes great contribution to global environmental protection and energy security. Presented in this paper are: the history of energy conservation, a comprehensive overview of the technological options for building energy conservation, measures taken to improve building energy efficiency and some suggestions suitable for China.
