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Accession number:20134216845515Title:Review on biogas upgrading technologies for producing biomethaneAuthors:Zheng, Ge (1); Zhang, Quanguo (1) Author affiliation:(1) College of Mechanical and Electrical Engineering, Henan Agricultural University, Zhengzhou, 450002, China Corresponding author:Zhang, Q.([email protected])Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural EngineeringAbbreviated source title:Nongye Gongcheng XuebaoVolume:29Issue:17Issue date:September 1, 2013Publication year:2013Pages:1-8Language:ChineseISSN:10026819CODEN:NGOXEODocument type:Journal article (JA)Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, ChinaAbstract:Biogas can be upgraded to biomethane, giving more utilization possibilities, such as utilization as autogas, or distant utilization by using the existing natural gas grid. Upgrading of biogas has gained increased attention due to rising oil and natural gas prices and increasing targets for renewable fuel quotes in many countries. This paper analyzes the possibility of the substitution of natural gas by biogas according to the characteristics and components of biogas and natural gas, and reviewed the biogas upgrading technologies including water scrubbing, organic physical scrubbing, chemical scrubbing, pressure swing adsorption (PSA), membrane separation, cryogenic upgrading, and the in situ methane enrichment processes. Among these upgrading technologies, water scrubbing and PSA are the main two processes from the point of view of commercialization, because of their comprehensive advantages in technical and economic aspects. Water scrubbing is a very simple process. In a scrubber, CO2 and H2S dissolve into the water, while CH4 does not because of their difference in solubility. PSA is the second most employed technique. In PSA processes, biogas is compressed to a vessel where it is put in contact with an adsorbent that will selectively retain CO2. In a similar manner to water scrubbing, it is possible to use chemicals to absorb CO2. However, chemical scrubbing may have higher energetic penalties since the CO2 removal in biogas is a bulk removal process. Membrane separation technology is an excellent technology with good prospects for separating CO2 and CH4. Owing to its superiority in upgrading cost and simplifying upgrading equipment, in situ methane enrichment technology is relatively simple, and there is no need for much auxiliary equipment. Therefore, it has a potential for a lower upgrading cost compared to other techniques, especially when it is used in a biogas plant with high concentration solids as materials. Furthermore, research and application of new materials on biogas upgrading technologies has become an important direction of research and development. MOFs used in the PSA process, and the application of ionic liquids on chemical scrubbing process, as well as research on composite membrane separation process have all reflected this trend.Number of references:47Main heading:BiogasControlled terms:Auxiliary equipment - Carbon dioxide - Composite membranes - Ionic liquids - Liquefied petroleum gas - Methane - Natural gas - Research - Reviews - Separation  - TechnologyUncontrolled terms:Membrane separation - Membrane separation process - Membrane separation technology - Pressure swing adsorption - Research and application - Research and development - Upgrading - Upgrading technologiesClassification code:903.2 Information Dissemination - 901.3 Engineering Research - 901 Engineering Profession - 804.2 Inorganic Compounds - 804 Chemical Products Generally - 802.3 Chemical Operations - 702.2 Fuel Cells - 523 Liquid Fuels - 522 Gas FuelsDOI:10.3969/j.issn.1002-6819.2013.17.001Database:CompendexCompilation and indexing terms, Copyright 2013 Elsevier Inc

Accession number:20134116842409Title:Ultrasound combined with slightly acidic electrolyzed water treatment improves quality of immature strawberryAuthors:Ge, Zhi (1); Liu, Donghong (1); Ding, Tian (1); Xu, Yuting (1); Zhong, Jianjun (1) Author affiliation:(1) College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China Corresponding author:Liu, D.([email protected])Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural EngineeringAbbreviated source title:Nongye Gongcheng XuebaoVolume:29Issue:17Issue date:September 1, 2013Publication year:2013Pages:265-270Language:ChineseISSN:10026819CODEN:NGOXEODocument type:Journal article (JA)Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, ChinaAbstract:The consumption of strawberries is preferable because of its nutritional value and special flavor. The ripe strawberry has an extremely short postharvest life because it is highly susceptible to mechanical injury, microbiological decay, and physiological deterioration. On the other hand, the strawberry is non-climacteric and will not ripen after harvest, therefore it has to be picked when fully ripened for the best eating quality. Current methods used for preventing undesirable changes of fruit attributes during storage have a detrimental effect on nutritional properties. Therefore, it's necessary to find appropriate methods to extend the shelf life and maintain the quality of the strawberry. The investigations of ultrasound and slightly acidic electrolyzed water (SAEW) used in postharvest fruits and vegetables have gained much attention in recent years. Ultrasound is one of the newest nonthermal methods to extend the shelf life of fruits during storage. Slightly acidic electrolyzed water (SAEW) is regarded as a novel and promising alternative method of disinfection in fresh products. It is hoped that ultrasound and SAEW could play a role in the preservation of the strawberry. This study was performed to investigate the effect of ultrasound and SAEW on the quality of an immature strawberry. The impact of SAEW and ultrasound, separately or in combination, on total aerobic bacteria and yeast and mold was studied. Quality attributes including firmness, total soluble solids (TSS), total titratable acidity (TA), vitamin C (VC), and anthocyanin content were also investigated. Results showed that ultrasound and SAEW alone or combined significantly removed about 0.52, 1.07, 1.29 lg CFU/g for total aerobic bacteria and 0.30, 0.93, 1.18 lg CFU/g for yeast and mold, respectively. And the treated samples also maintained relatively low microbial loads during storage. It was observed that the three treatments changed the respiratory characteristic of strawberries and a respiratory peak appeared during storage. The TSS, TA, VC, and anthocyanin content appeared to be 10.93, 0.52%, 65.7 mg/100g, and 3.20 mg/100g immediately after harvest. In 14 storage days, anthocyanin content was gradually increased as 4.16 mg/100g, while TSS, TA, and VC content changed little for the control group. All the treatments increased the content of TSS, VC, and anthocyanin during storage. The TSS, VC, and anthocyanin levels in fruit treated by ultrasound and SAEW were 7.72%, 10.53%, and 19.28% higher, respectively, than that in the control fruit after 14 days of cold storage. It was also found that ultrasound inhibited the decrease of firmness, while SAEW had no impact on the firmness of strawberries. Overall, it was found that ultrasound and SAEW treatment could promote strawberry after-ripening during storage. Results showed that both ultrasound and SAEW have the potential to ensure the microbial safety and improve the quality of an immature strawberry during storage.Number of references:22Main heading:FruitsControlled terms:Aerobic bacteria - Anthocyanins - Cold storage - Energy storage - Molds - Physiology - Quality control - Ultrasonics - YeastUncontrolled terms:Fruits and vegetables - Immature strawberry - Microbial loads - Nutritional properties - Slightly acidic electrolyzed waters - Total aerobic bacteria - Total soluble solids - Utrasonic treatmentClassification code:821.4 Agricultural Products - 816.2 Plants and Machinery for Plastics and Other Polymers - 804.1 Organic Compounds - 801.2 Biochemistry - 913.3 Quality Assurance and Control - 753.1 Ultrasonic Waves - 694.4 Storage - 461.9 Biology - 461 Bioengineering and Biology - 702 Electric Batteries and Fuel CellsDOI:10.3969/j.issn.1002-6819.2013.17.034Database:CompendexCompilation and indexing terms, Copyright 2013 Elsevier Inc

Accession number:20134116842402Title:Compositional analysis of bio-oil from pyrolysis of algaeAuthors:Wang, Shuang (1); Wang, Qian (1); Xu, Shannan (2); Jiang, Xiumin (3); Ji, Hengsong (1); He, Zhixia (1) Author affiliation:(1) School of Energy and Power Engineering, Jiangsu University, Zhenjiang 212013, China; (2) Key Lab. of South China Sea Fishery Resources Exploitation and Utilization, Ministry of Agriculture, South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou 510300, China; (3) Institute of Thermal Engineering, Shanghai Jiao Tong University, Shanghai 200240, China Corresponding author:Xu, S.([email protected])Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural EngineeringAbbreviated source title:Nongye Gongcheng XuebaoVolume:29Issue:17Issue date:September 1, 2013Publication year:2013Pages:204-211Language:ChineseISSN:10026819CODEN:NGOXEODocument type:Journal article (JA)Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, ChinaAbstract:Though the work of pyrolysis of biomass for bio-oil has attained many achievements, the research on seaweed for bio-oil has been proceeding slowly. In this paper, fast pyrolysis experiments of algae biomass (Enteromorpha clathrata and Sargassum natans) were studied. Two kinds of algal bio-oil (Enteromorpha clathrata and Sargassum natans) obtained under different work conditions (400, 500, 600°C and carried gas) were analyzed by using GC-MS analysis. Besides nitrogen-containing compounds, the major constituents of algal bio-oil were hydrocarbon, alcohols, ketones, aldehydes, and phenolic compounds, as well as large molecular weight carboxylic acids and their derivatives. The algal bio-oil also included a small amount of heterocyclic compounds (derivatives of furan, pyridine, pyran, etc.). It was seen from the comparison between two bio-oils that Enteromorpha clathrata bio-oil had lots of hydrocarbons, carboxylic acids and their derivatives, while Sargassum natans bio-oil contained many alcohols compounds and steroids. In addition, in Sargassum natans bio-oil, palmitate, oleic acid, and peanut acid were also detected. Furthermore, the pyrolysis mechanism of seaweed biomass was studied preliminarily. The GC-MS method was also applied to analyze the collected oil pyrolyzed from pure protein. It was shown that nitrogen-containing compounds occupied 50% in the product, and phenols and aldehydes accounted for a part of oil, while alcohols, ketones and ethers were not found. The results also indicated that aromatic hydrocarbons did not exist in oil of protein. Most nitrogen-containing compounds in algae pyrolytic bio-oil were in accordance with the decomposition of protein. It was found in the result that the nitrogen content in bio-oil of Enteromorpha clathrata was apparently higher than that of Sargassum natans, which was closely due to their protein content. In this paper, the effects of temperature and carrier gas on the behavior of seaweed fast pyolysis were analyzed. The oil, gas and coke production rates were obtained, respectively. The bio-oils pyrolyzed under different work conditions were very similar in composition, but the relative contents of the components were different. Significant difference analysis was used to analyze the results. Pyrolysis temperature played an important role on the distribution of algal bio-oil composition, while the influence of the carrier gas flow rate was not obvious. The carrier gas only had the effect on the contents of C11(C15, nitrogen-containing compounds, and carboxylic acids and derivatives. The optimum temperature for algal pyrolytic bio-oil was determined to be from 500 to 600°C. Comparing bio-oil pyrolyzed from seaweed with that from terrestrial lignocelluloses biomass, it was obvious to find that the content of hydrocarbons in Enteromorpha clathrata and Sargassum natans bio-oil (obtained at the temperature of 500°C) was approximately 16.61% and 5.04%, respectively, while the content of hydrocarbons in lignocelluloses biomass was very low. Therefore, it can also be seen that the advantage of algal bio-oil is the high content of hydrocarbons. At the same time, the oxygen content of algal bio-oil is also lower than that of terrestrial biomass. However, seaweed also has disadvantages in that the content of nitrogen in algal bio-oil is higher than that in lignocelluloses biomass.Number of references:28Main heading:BiofuelsControlled terms:Aldehydes - Algae - Biogas - Biomass - Carboxylic acids - Cellulose - Chemical analysis - Hydrocarbons - Ketones - Lignin  - Nitrogen - Palmitic acid - Proteins - Pyrolysis - Seaweed - TemperatureUncontrolled terms:Carrier gas flow rates - Compositional analysis - Effects of temperature - Heterocyclic compound - Optimum temperature - Pyrolysis mechanism - Pyrolysis temperature - TG-MSClassification code:815.1.1 Organic Polymers - 804.1 Organic Compounds - 804 Chemical Products Generally - 802.2 Chemical Reactions - 641.1 Thermodynamics - 525.1 Energy Resources and Renewable Energy Issues - 524 Solid Fuels - 523 Liquid Fuels - 522 Gas Fuels - 471.1 Oceanography, General - 461.2 Biological Materials and Tissue EngineeringDOI:10.3969/j.issn.1002-6819.2013.17.027Database:CompendexCompilation and indexing terms, Copyright 2013 Elsevier Inc

Accession number:20134116842390Title:An image fusion algorithm of infrared thermal and optical images for pig contourAuthors:Liu, Bo (1); Zhu, Weixing (1); Huo, Guanying (3) Author affiliation:(1) School of Electrical and Information Engineering, Jiangsu University, Zhenjiang 212013, China; (2) College of Mechanical and Electrical Engineering, Hohai University, Changzhou 213022, China; (3) College of Internet of Things Engineering, Hohai University, Changzhou 213022, China Corresponding author:Zhu, W.Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural EngineeringAbbreviated source title:Nongye Gongcheng XuebaoVolume:29Issue:17Issue date:September 1, 2013Publication year:2013Pages:113-120Language:ChineseISSN:10026819CODEN:NGOXEODocument type:Journal article (JA)Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, ChinaAbstract:Recently, given the new trends to higher efficiency and automation in livestock farming, research of livestock health monitoring through computer vision has been an active area. Our team has concentrated on pig health monitoring for some time. It was found that pig contour segmentation and feature extraction are unstable and disturbed by pig manure and uneven illumination distribution in the rough environment of a pig house. In this paper, an image fusion method based on the nonsubsampled contourlet transform (NSCT) is presented to improve the stability and accuracy of pig contour segmentation. First, the infrared thermal image and the optical image of a pig, which have been registered, are decomposed by NSCT. After that, a group of low frequency sub-band coefficients and multi-directional band-pass sub-band coefficients of each source image could be obtained. Secondly, different fusion rules for low frequency sub-band coefficients and band-pass sub-band coefficients were proposed. For the fusion of low frequency sub-band coefficients, both the factors of average energy and variance of neighbor area were considered to compute a combined value first. Then, weighted values were obtained based on it. The weighted average results of the coefficients of each image were selected as the final low frequency sub-band coefficients of fusion image. For the band-pass sub-band coefficients, the fusion coefficients were selected based on the rule of maximum energy of a neighbor area. Finally, the fusion image was obtained through inverse NSCT. In experiments, a FLIR T250 infrared thermal imager was used to acquire IR thermal image and optical image at Xima animal husbandry corporation in Zhenjiang city, Jiangsu Province. Before fusing, a pair of IR and optical experiment images with resolution of 452×339 were obtained, which are registered by using the method of contour matching of radial line feature points. Then, a group of tests were completed by using different image fusion methods, including IHS, DWT, contourlet transform and the proposed algorithm. The comparative results show that the proposed algorithm gives the better fusion effect, the average gradient value is about 25% and the quality of edge information remained about 23% higher than the other three methods. The contour segmentation results of fusion images by using Otsu method also demonstrate the good performance of the proposed algorithm. Furthermore, to contrast with different fusion rules in NSCT field, another group of tests illustrated the better segmentation result compared with the other three rules. All the experimental results demonstrated that the proposed algorithm improved the stability and accuracy of pig contour segmentation, which provides a basis for the further research of multi-senor image feature extraction for pig health monitoring.Number of references:32Main heading:Image fusionControlled terms:Agriculture - Algorithms - Experiments - Feature extraction - Geometrical optics - Image segmentation - Infrared imaging - OpticsUncontrolled terms:Contour segmentation - Image feature extractions - Image fusion algorithms - Infrared thermal image - Infrared thermal imager - Non subsampled contourlet transform (NSCT) - Non-sub-sampled contourlet transforms - Uneven illuminationsClassification code:921 Mathematics - 901.3 Engineering Research - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 746 Imaging Techniques - 741.1 Light/Optics - 723.2 Data Processing and Image Processing - 723 Computer Software, Data Handling and ApplicationsDOI:10.3969/j.issn.1002-6819.2013.17.015Database:CompendexCompilation and indexing terms, Copyright 2013 Elsevier Inc


Accession number:20134116842385Title:Use of fully polarimetric RADARSAT-2 data to retrieve soil moisture of periodic surfacesAuthors:Yin, Nan (1); Jiang, Qigang (1); Meng, Zhiguo (1); Li, Yuanhua (1) Author affiliation:(1) College of Geo-Exploration Science and Technology, Jilin University, Changchun 130026, China; (2) College of Surveying and Prospecting Engineering, Jilin Architectural University, Changchun 130118, China Corresponding author:Jiang, Q.([email protected])Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural EngineeringAbbreviated source title:Nongye Gongcheng XuebaoVolume:29Issue:17Issue date:September 1, 2013Publication year:2013Pages:72-79Language:ChineseISSN:10026819CODEN:NGOXEODocument type:Journal article (JA)Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, ChinaAbstract:Apart from surface roughness and soil moisture, the azimuth angle of a crop row is also a contributing factor of the backscattering coefficients of periodic bare soil surfaces. The commonly used models for estimating soil moisture could be applied to randomly rough surfaces, but not periodic surfaces. Based on the fully polarimetric RADARSAT-2 and field sampling data, this paper analyzes the response of backscattering coefficients to the azimuth angles of the crop rows. The like-polarized (hh or vv) backscattering is very sensitive to azimuth angles, assuming trigonometric function. Abnormal high value appears at the position around 90°. Thus, adjustment to the like-polarized backscattering coefficients is needed in order to remove the influence from azimuth angles. The cross-polarized (vh) backscattering shows a random distribution, reacting insensitively to the changes of azimuth angles. Assuming that the backscattering coefficient from periodic surfaces is the result of a random function (related to soil moisture and root mean square height) results in adding a cosine function (related to azimuth angles). Thus, through the difference between backscattering coefficients measured by SAR and calculated by an Oh model, the fitting error functions were acquired and could be regarded as the difference between periodic surfaces and random rough surfaces, and then the like-polarized images could be corrected. The correlation coefficients between the corrected backscatter coefficients and soil moisture are 0.626 and 0.775 respectively in hh and vv polarization modes, which are significantly improved compared with the results before correction. The scatter of the corrected co-polarized ratio p was randomly distributed with no abnormal value around 90°. This proves that co-polarized ratio p could remove the effect of azimuth angles and abnormal value. While the cross-polarized radio q could remove the effect of azimuth angles to some extent, it was affected by the abnormal value around 90°. Finally, the soil moisture and root mean square height of the study area can be estimated by solving two equations (vh and p). This study selected 17 sampling points as checkpoints. The correlation coefficient between estimated soil moisture and measured soil moisture was up to 0.88, with the average relative error of 11.13% and the standard deviation of 0.0256 cm3/cm3. The correlation coefficient between estimated root mean square height and measured root mean square height was 0.76, with the average relative error of 13% and the standard deviation of 0.1315 cm. There was no significant difference in accuracy between the samples with azimuth angles of 90° and the other samples. The inversion accuracy of the corrected Oh model for periodic surfaces is very close to the models of randomly rough surfaces. The modified model is reliable and applicable for periodic surfaces.Number of references:23Main heading:Soil moistureControlled terms:Backscattering - Contour measurement - Cosine transforms - Crops - Functions - Models - Polarimeters - Polariscopes - Radar imaging - Statistics  - Surface roughness - Synthetic aperture radarUncontrolled terms:Average relative error - Backscatter coefficients - Backscattering coefficients - Correlation coefficient - Periodic surfaces - Radarsat-2 - Randomly rough surfaces - Trigonometric functionsClassification code:943.3 Special Purpose Instruments - 941.3 Optical Instruments - 931.2 Physical Properties of Gases, Liquids and Solids - 922.2 Mathematical Statistics - 921.3 Mathematical Transformations - 921 Mathematics - 902.1 Engineering Graphics - 821.4 Agricultural Products - 716.2 Radar Systems and Equipment - 711 Electromagnetic Waves - 483.1 Soils and Soil MechanicsDOI:10.3969/j.issn.1002-6819.2013.17.010Database:CompendexCompilation and indexing terms, Copyright 2013 Elsevier Inc

Accession number:20134116842404Title:Carbon effect evaluation and low-carbon optimization of regional land useAuthors:Zhao, Rongqin (1); Huang, Xianjin (2); Zhong, Taiyang (2); Chuai, Xiaowei (2) Author affiliation:(1) College of Resources and Environment, North China University of Water Resources and Electric Power, Zhengzhou 450045, China; (2) School of Geographic and Oceanographic Sciences, Nanjing University, Nanjing 210093, China Corresponding author:Huang, X.([email protected])Source title:Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural EngineeringAbbreviated source title:Nongye Gongcheng XuebaoVolume:29Issue:17Issue date:September 1, 2013Publication year:2013Pages:220-229Language:ChineseISSN:10026819CODEN:NGOXEODocument type:Journal article (JA)Publisher:Chinese Society of Agricultural Engineering, Agricultural Exhibition Road South, Beijing, 100026, ChinaAbstract:To explore the influences of human activities on the global carbon cycle, anthropogenic carbon emission has become one of the major concerns in academic circles. Regional land use is an important source of carbon emissions. As a direct embodiment of human activities and government policies, the alteration of land use structure will change the pattern and structure of human energy consumption, which will further influence natural and anthropogenic carbon emissions and regional carbon cycle efficiency. Therefore, the impact of human economic and energy activities on the regional carbon cycle was largely achieved by changing land use structure and pattern. Land use is an important driving factor of low-carbon economy and carbon emissions, and is an important tool for carbon emission regulation and control. Research on the carbon effect of land use and its regulation helps to promote the developing of a low-carbon economy through land use planning, industrial structure regulation and control and territorial development, renovation and management. First, this paper evaluated the carbon effect of the overall plan for land utilization in Nanjing through determining the parameters for carbon effect evaluation. Then, three schemes for land use low-carbon optimization were proposed and analyzed, and the policy suggestions were put forward finally. The main conclusions are as follows: 1) The carbon storage, carbon emission, and carbon sink under land use overall planning scheme of Nanjing in 2020 was 344.35(104, 1293.90(104, 3.40(104t higher than that in the land use structure in 2005 respectively. Generally, the land use planning scheme of Nanjing city in 2020 will increase regional carbon storage to some extent, but will decrease the carbon sink function of the terrestrial ecosystem, and will also promote the increase of carbon emission. 2) Carbon emission of the land use structure optimization scheme based on the lowest carbon emission will be 73.75(104t lower than that in the land use overall planning scheme in 2020, and the carbon emission reduction potential is 8.50%. If considering the carbon storage and carbon sink of Nanjing city under the land use structure optimization scheme base on the lowest carbon emission, the total carbon emission reduction and carbon sink increasing potential will reach 148(104t, which means that the land use structure optimization scheme base on lowest carbon emission scheme will be the best land optimization scheme to add carbon sink and reduce carbon emissions. Through Monte Carlo simulation, the carbon emission reduction potential of the land use structure optimization scheme based on the lowest carbon emission scheme was further confirmed. 3) In order to promote low-carbon economic development in Nanjing, we suggest that the land use structure optimization scheme based on the lowest carbon emission should be considered as an important reference in the future land use structure adjustment and industrial planning in Nanjing city. This scheme will not only help to realize the aim of carbon emission reduction during "the Twelfth-Five Planning" of Nanjing city, but will also have important practical significance for the controlling of constructive land expansion, adding of productive land use areas, guiding the land use planning and exploiting activities such as consolidation of agricultural land and rural residential areas. Furthermore, the carbon effect evaluation method should be introduced into the environmental impact assessment of land use activities to establish low-carbon land use patterns.Number of references:30Main heading:Land useControlled terms:Carbon - Economics - Emission control - Energy utilization - Environmental impact assessments - Environmental management - Industrial research - Monte Carlo methods - Optimization - Research and development managementUncontrolled terms:Carbon emission reductions - Industrial structures - Land use structure optimizations - Nanjing cities - Regulation and control - Rural residential areas - Terrestrial ecosystems - Territorial developmentClassification code:971 Social Sciences - 922.2 Mathematical Statistics - 921.5 Optimization Techniques - 901.3 Engineering Research - 804 Chemical Products Generally - 525.3 Energy Utilization - 454.2 Environmental Impact and Protection - 451.2 Air Pollution Control - 403 Urban and Regional Planning and DevelopmentDOI:10.3969/j.issn.1002-6819.2013.17.029Database:CompendexCompilation and indexing terms, Copyright 2013 Elsevier Inc

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