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Table of Content

    20 May 2016, Volume 52 Issue 3
    Hybrid CNT Film-Graphene Photodetectors with Low Noise and Broadband
    LI Zishen, LIU Yang, XU Haitao, WEI Nan, YU Dangmin, WANG Sheng
    2016, 52(3):  383-388.  DOI: 10.13209/j.0479-8023.2015.127
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    Highly purified semiconducting carbon nanotube (CNT) thin films and graphene are used to fabricate hybrid photodetector. The results indicate that the hot carriers generated in graphene can tunnel into bottom CNT film through nanometer thick silicon film when illuminated. As a result, electrons and holes are accumulated at separated side of the silicon layer, resulting in a modulation of the current in the CNT film transistor due to the photogating effect. The photodetector shows a responsivity of 83 mA/W for visible light (633 nm) and a good response within the near-infrared range. Such CNT film-graphene photodetector, taking advantages of both broadband absorption of graphene and small dark current of semiconducting CNTs, paves the way to future high performance infrared photodetectors.

    Research on Low Density Parity Check Code Reverse Recognition Methods Based on Posterior Probability
    LIU Wanyue, BAO Xin, WANG Da, JIN Ye
    2016, 52(3):  389-395.  DOI: 10.13209/j.0479-8023.2016.055
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    This paper presents a method of the reverse recognition of the check matrix coded by low density parity check code (LDPC), which is based on the posterior probability log likelihood ration (LLR). The posterior probability LLR was obtained by estimating the channel amplification and the variance of the noise in the received code. A reverse recognition of LDPC code check matrix was achieved following the LLR mean value maximization principle. Simulation results show that the receiver can precisely retrieve the LDPC check code used by the sender under different channel circumstances through the LDPC reverse recognition method.

    Detection of Fast-Flux Domains Based on Passive DNS Analysis
    ZHOU Changling, CHEN Kai, GONG Xuxiao, CHEN Ping, MA Hao
    2016, 52(3):  396-402.  DOI: 10.13209/j.0479-8023.2016.064
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    The authors use Passive DNS to log domain name query history of real campus network environment, and construct eighteen feature sets grouping by diversity, time, growth, and relevance, and then propose a model detect Fast-Flux Domains using random forest algorithm. The result shows that the proposed model can classify domains with accuracy over 90% by cross validation experiments. The model can detect Fast-Flux domains in the datasets used in this study more effectively compared with Fluxbuster.

    Collinear Equation Linearized Matrix Model
    XU Zhenliang, LI Yanhuan, YAN Li, YAN Lei
    2016, 52(3):  403-408.  DOI: 10.13209/j.0479-8023.2016.056
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    Using the matrix expression form of computer vision projection equation, the collinear equation is constructed into matrix equation. With the projection matrix element as a composite function, this paper realizes the unification derivation of each variable of the collinear equation based on the matrix analysis method. Compared with the traditional analytical method of linearization, the form of matrix analysis process is quite succinct and easy to understand, which can be used to the numerical solution of linear library application. For the various construction form of the rotation matrix, this method has better adaptability. The constructed matrix of collinear equation has important enlightenment significance for using computer vision method.

    Ground-Based Measurement and Variation Analysis of Carbonaceous Aerosols in Wuqing
    XU Wei, FU Tzung-May, CHEN Jinxuan, TIAN Heng
    2016, 52(3):  409-419.  DOI: 10.13209/j.0479-8023.2015.144
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    To understand the concentrations and sources of carbonaceous aerosols in Northern China, real-time, semi-online, hourly measurements of PM2.5 compositions were conducted at an urban site in Wuqing, Tianjin from December 31, 2011 to January 11, 2012. The mean concentrations of EC and OC in Wuqing were 6.0±4.8 and 21.5±19.2 μg C/m3 respectively, which constituted 8% and 30% of the total measured PM2.5 constituent mass. The mean concentration of WSOC was 14.3±11.8 μg C/m3, which constituted 67% of the mean OC concentration. During the observation period, the large variability of pollutant concentrations were mainly driven by synopticscale meteorological events. As a result, the diurnal patterns of EC, OC, and WSOC were relatively indistinct. The observed mass ratios of OC/EC was relatively stable throughout the observation period and averaged 3.9. Based on correlation analysis with other tracer constituents, it is found that the wintertime carbonaceous aerosols in Wuqing came mainly from biomass burning emissions and experienced significant aging. Roughly half of the OC were from biomass burning; the other half were from secondary formation processes.

    A Computational Scheme for Quantitatively Removing the Effects of Lateral Velocity Variation on 1-D Triplicated Wave Velocity Inversion
    LI Jiaqi, WANG Shuguang, CAI Chen, NING Jieyuan
    2016, 52(3):  420-426.  DOI: 10.13209/j.0479-8023.2016.041
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    Theoretical analysis quantitatively shows that high velocity anomaly near source, low velocity anomaly near receiver and the lateral velocity variation above the target inversion area have the influence of the same dimension of anomaly on the traditional inversion of 1-D wave velocity by triplicated wave arrival times. A quantitative computation scheme is proposed to remove the smearing effects with the help of regional or global tomography results when using 1-D inversion by triplicated wave arrival times. Tests imply that the velocity smearing could be eliminated to great extent and the real 1-D structure might be recovered.

    Theoretical Investigation on Earthquake Source Spectra Isolation by Iteratively Stacking Separation
    LI Jiaqi, WANG Shuguang, NING Jieyuan
    2016, 52(3):  427-436.  DOI: 10.13209/j.0479-8023.2016.042
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    The correctness of the earthquake source spectra derived from array data with an iteratively stacking method is checked by analyzing the expressions of iterative stacking in each step. The expression of the finally derived source spectra term shows that it has nothing of the station term, but will be affected by the path term dependent on the source-receiver configuration, which is further confirmed by numerical simulations with iteratively stacking method. Considering stress drop might be wrongly estimated when stations or events are unevenly distributed, the paper provides a strategy to derive the correct stress drop in typical conditions of stationevent configurations. It will be helpful to correctly acquire seismic source information from seismic data.

    Discovery and Its Significance of Birgeria sp. from the Middle Triassic Panxian Fauna, Guizhou Province, China
    JIANG Li, NI Peigang, SUN Zuoyu, JIANG Dayong
    2016, 52(3):  437-443.  DOI: 10.13209/j.0479-8023.2016.044
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    A large-sized caudal fin of the actinopteryigan Birgeria, from the Middle Triassic (Pelsonian, Anisian) Panxian Fauna in the Upper Member of the Guanlin Formation, Panxian County, Guizhou Province, China is described. It is the first report of Birgeria in the Panxian Fauna and represents the earliest fossil record of Birgeria in China. There are some specialized characters for this specimen in accordance with Bigeria: the speculated large size, narrow scales without ganoine ornament merely covering the posterodorsal portion of the caudal peduncle and the axial lobe of the caudal fin, single neural spine and haemal spine in caudal region, fulcra scales developed on the dorsal margin of the caudal fin, etc, which support the assignment of the current specimen to the genus Birgeria. Moreover, it distinguish from all known Birgeria species in its relatively large size (speculated total length over 2 m), a higher number of hypural (9), fulcras of the ventral margin of the caudal fin more developed and a bigger angle between the posterior margin of upper lobe and that of the lower lobe (>70º), but, a Birgeria sp. instead of a new species of Birgeria is assigned herein due to limited material. Birgeria is a kind of large carnivorous fish exsisting only in the Triassic ocean, which can be found from the Anisian Panxian Fauna to the Carnian Guanlin Fauna. The first appearance of Birgeria in China is later than that in West Tethys in Smithian, Early Triassic.

    The Characteristics and Implication of Origin of the Giant Patch Dolomite of the Lower-Middle Ordovician in Wuligezitag Area NE Tarim Basin, China
    WU Shuanglin, SHI Kaibo, LIU Hongguang, LIU Jianqiang, WANG Yuxi, LIU Bo
    2016, 52(3):  444-456.  DOI: 10.13209/j.0479-8023.2015.118
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    Based on comprehensive analysis of field work, petrological and geochemical characteristics, this paper studies the characteristics and origin of giant patch dolomite of the Lower-Middle Ordovician HangGuletag Formation in Wuligezitag area, NE Tarim Basin, China. It can be seen in the field that the grayish yellow giant patch dolomite partially develops in the black thin-bedded micritic limestone, with an irregular boundary not controlled by sedimentation. The giant patches are several meters in size (the largest >10 m) which is larger than and quite different from the several-centimeter (decimeter) burrow-related dolomite or leopard fur dolomite. Microscopically, it consists of micro-finely and planare(s) dolomite crystals with a size near 100 μm. Besides, it is also characterized by its unique geochemical features: 1) δ13CPDB (−1.34‰-−0.62‰) accords with the range of Early Ordovician seawater while δ18OPDB (−8.01‰ -−4.79‰) is higher; 2) 87Sr/86Sr  (0.711000-0.711535, AVG=0.710863) is much higher than that of limestone and contemporaneous seawater; 3) average high Fe and Mn content (2001.32 and 601.73 μg/g, respectively) and low Sr and Ba (33.14 and 8.27 μg/g, respectively) content versus that of limestone; 4) dolomite has slightly negative Eu anomaly and similar REE composition and distribution patterns compared with limestone; 5) low order degree value (AVG=0.6). This study reveals that the dolomitization was related to fault and occurred in low-temperature and shallow-burial environment in Early-Middle Ordovician. Dolomitizing fluid was generated from the concentrated formation fluid in lower-middle member of HangGuletag Formation and underlying Tursaktag Group. Most Mg2+ came from the stabilization of quasi-stable carbonate minerals, and the transformation of clay minerals of (calcareous) mud in the limestone strata not only provided a little Mg2+ but caused the rise of 87Sr/86Sr. Dolomitizing fluid was likely to be richened in Xingdi-related normal fault and fractures which also acted as the main fluid pathways, and it finally caused the partial dolomitization of nearby limestone strata.

    Characterization and Fracturing Stimulation on Single Sand Body of Tight Sandstone Oil Reservoir in Ansai Oilfield
    ZHU Danni, PAN Mao, DANG Yongchao, ZHU Zhiping, LIU Peigang, SHI Yongmin
    2016, 52(3):  457-466.  DOI: 10.13209/j.0479-8023.2015.117
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    In the middle and late stage of oilfield exploitation of multi-period superimposed channel tight sandstone oil reservoir in Ansai oilfield, water content of the well is increasing and the effective production of the reservoir is uneven. The breakthrough and water-flooding occur easily during the integral fracturing, which can’t be adapted to the oilfield production situation today. In order to solve this problem, rock mechanics model and triaxial stress field distribution model are built by subdivision and correlation of single sand body between oil and water wells, full-length fracturing numerical simulation are carried out by combining with fracturing parameters design, stress intercalations were formed, which could constrain the distribution of fracturing fracture. Although fractures in the intercalations are formed during fracture operation, gaping fissures are closed with the decrease of pump pressure so that propping agents can’t enter into the intercalations to cause effective fractures, effective production of single sand body in the reservoirs is uneven, and effective producing degree of 60% of layers is relatively low. Thus for the 11 wells which have a low producing degree in the small layer, measures of additional perforation, multiple fracturing, shutting off water and exploitation when separated with other pay zone are proposed, which have an apparent stimulation effect after site implementation. Average daily increase of production is more than 1.2 t. In summary, the technique approach system of subdivision and fracturing treatment of multi-period superimposed channel tight single sand body is formed, which could guide the future development of the similar reservoirs.

    U-Pb Detrital Zircon Age Constraints on the Neoproterozoic Tereeken Glaciation in the Quruqtagh Area, Northwestern China
    LUO Zhiwen, XU Bei, HE Jinyou
    2016, 52(3):  467-474.  DOI: 10.13209/j.0479-8023.2016.043
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    U-Pb dating of detrital zircons from the pebbly siltstone at the top of the Tereeken Formation yielded the youngest zircon ages of 629±8 Ma, representing the maximum depositional age of the Tereekan glaciation. This result indicates that the Tereeken glaciation might be correlated with the Nantuo glaciation in the Yangtze Platform and the global Elatina or Marinoan glaciation. The remaining older zircons fall into three age-groups: 718-887 Ma, 1822-2092 Ma and 2345-2613 Ma, indicating three main Precambrian magmatic events in the Quruqtagh area.

    Urban Expansion Extraction Using Landsat Series Data and DMSP/OLS Nighttime Light Data: A Case Study of Tianjin Area
    CHAI Baohui, LI Peijun, ZHANG Ruijie, ZHAO Peng
    2016, 52(3):  475-485.  DOI: 10.13209/j.0479-8023.2015.138
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    By taking Tianjin urban area as an example, a method is proposed to extract urban expansion by combining multi-temporal Landsat TM/ETM+ images and DMSP/OLS nighttime light data, and validated and analyzed. First, the candidate built-up area extent were obtained from DMSP/OLS data. Multitemporal Landsat TM/ETM+ images and derived multivariate textures of the obtained urban extent were classified to extract built-up areas for different dates. Urban expansions for different time intervals were obtained by post-classification comparison method. In addition, the thresholding method was applied to multitemporal DMSP/OLS nighttime light data to extract urban extents for different years and urban expansions of different time intervals were produced. The urban expansion results from DMSP/OLS data and urban statistical data were used to verify the Landsat TM/ETM+ results. The results demonstrate that the combination of Landsat data and DMSP/OLS data effectively reduce the spectral confusion between bare land and urban area and thus produce higher accuracy than useing spectral data from Landsat TM/TM+ images alone in extraction of urban built-up area expansion. Combination of Landsat TM/ETM+ data and DMSP/OLS nighttime light data provides an effective method for urban expansion extraction in mega-city areas.

    Common Problems and Technical Innovation of Travel Survey in Old Town: A Case Study in Qianmen Area in Beijing
    ZHAO Pengjun, FENG Xiao, LI Shengxiao
    2016, 52(3):  486-492.  DOI: 10.13209/j.0479-8023.2015.155
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    This study targets on the practical process of travel survey in Qianmen, Beijing and examines the problems derived from the survey. Their characteristics and the reasons of being generated are stated. The paper focuses on survey organization and its institutional obstacles, the survey design, survey sampling techniques, the choice and training of surveyors and the survey timing. Based on the theoretical researches, the advices towards the innovation of travel survey methods are proposed.

    Ecosystem Service Valuation and Value Transfer of Land Use Types: A Comprehensive Meta-analysis of the Literature
    ZHANG Yaxin, LIU Ya, ZHU Wenbo, LI Shuangcheng
    2016, 52(3):  493-504.  DOI: 10.13209/j.0479-8023.2016.026
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    Based on Meta-analysis, the ecosystem service value regression models for cultivated land, forest land, pasture, garden land, waters and unused land were established respectively. In addition to time and value method, the geographical division and socio-economic factors (including population density and GDP per capita) were also incorporated into the models. The performance of model indicates that these factors play a significant role in explaining ecosystem service value change. Using value transfer approach, the authors valued ecosystem service of land use types in Beijing, Tianjin, and 11 cities in Hebei Province. The results show that land use types ranked by ecosystem service value are waters, forest land, pasture, garden land, cultivated land and unused land. The ecosystem service values per unit area of cultivated land, forest land, pasture, garden land and water area in Beijing and Tianjin are more than other areas. The research results on the one hand can enrich the methodology and technology of ecosystem service valuation, on the other hand provide scientific support for land use sustainable management in study area.

    Temporal and Spatial Distribution Characteristic Research of Water Environmental Capacity in Moyang River Basin
    CHENG Xiang, ZHAO Zhijie, QIN Huapeng, SONG Baomu, YU Xiangying, HE Kangmao
    2016, 52(3):  505-514.  DOI: 10.13209/j.0479-8023.2016.029
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    This study takes Moyang River basin, which is lack of hydrologic data, as the research object to simulate the temporal and spatial distribution of water flow through HSPF (hydrological simulation program-Fortran) model, and calculates the temporal and spatial distribution of chemical oxygen demand (COD) and ammonia nitrogen water environmental capacity using one-dimensional steady-state water quality mathematical model. Results show that 1) HSPF model’s yearly and monthly hydrological errors are below 15%, Nash-Sutcliffe coefficient is over 0.9; the relative error of the water quality model is around 10%, Nash-Sutcliffe coefficient over 0.8. 2) Under 90%, 50% and 10% assurance rate, COD capacity of Moyang River basin is 164500 t, 218400 t and 249700 t respectively, and ammonia nitrogen is 5100 t, 8800 t and 11400 t respectively. Affected by seasonal runoff fluctuations, difference of water environment capacity between dry season and wet season is obvious. The variation of water environment capacity in January is minimum and June the maximum. 3) Bearing capacity of main stream of Moyang River is larger than that of the primary and secondary tributaries. Therefore, in some basins where hydrological data is lack, HSPF model can be applied to simulate the hydrology, analysis time and space distribution of water environmental capacity, and provide guidance for the establishment of total amount control scheme of water environmental capacity.

    Economic and Environmental Effects of Improved Auto Fuel Economy Standard in China: A CGE Analysis
    LIU Qing, LIU Yu, XU Jintao
    2016, 52(3):  515-527.  DOI: 10.13209/j.0479-8023.2016.032
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    The authors use CHINAGEM, a computable general equilibrium model to investigate the economic effect and pollution reduction impacts of improved auto fuel economy standard in China. The policy change is modelled as shocks to production tax rate of two industries — petrol refine and motor vehicle parts. The results show that the shocks lead to higher labor cost, slightly decreased GDP and improved terms of trade. The majority of industries, such as motor vehicle manufacturing, will undergo downsizing because of new standards and substitution of imported motor vehicles for domestic ones. However, with improved emission standard and slowdown of vehicle production growth, air pollution problem will be alleviated. Based on the model prediction, the annual emission reductions of carbon monoxide, hydrocarbons, nitrogen oxides and total particulate matter amount to 39.52, 37.51, 11.63 and 1.66 million tons respectively, which are 32, 36, 63, and 87 percentage reduction from the respective business-as-usual levels.

    Trends of Summertime Ground-Level Peroxyacyl Nitrates Concentrations in Beijing, China from 2006 to 2014
    HUANG Zhi, GAO Tianyu, ZHAO Ximeng, WANG Feng, YANG Guang, WANG Bin, XU Zhenqiang, HU Min, ZENG Limin, ZHANG Jianbo
    2016, 52(3):  528-534.  DOI: 10.13209/j.0479-8023.2016.033
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    Ambient concentrations of PANs and other related air pollutants were monitored at an urban site in Beijing each August from 2006 to 2014. The NOx concentration decreased at a rate of 1.7 nL/(L/yr) (about 4%/yr), and the PAN concentration decreased at a rate of 0.03 nL/(L/yr) (about 3%/yr), while the O3 concentration increased at a rate of 1.5 nL/(L/yr) (about 4%/yr), indicating that the measures taken to cut NOx were effective for controlling PAN concentration. Beijing needs to strengthen the control of VOCs with reducing NOx emissions for reducing O3 concentration.

    Similarities and Differences in Spatial Distribution and Its Influencing Factors of Two Kinds of National Wetland Parks in China
    FAN Honglei, WANG Fang
    2016, 52(3):  535-544.  DOI: 10.13209/j.0479-8023.2016.028
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    This paper analyzes the spatial distribution of two kinds of national wetland parks and their differences and similarities by applying GIS and the methods of nearest neighbor index, Gini coefficient and kernel density estimation. Their influencing factors from the aspects of natural geography, social economy, and cultural environment are discussed with the use of SPSS and geographic analysis methods. Results show that the different development of two kinds of national wetland parks is closely related to different decisions of competent authorities and the attention of the government. They both have the agglomerate trend across the nation in spatial distribution, imbalanced status of state-level wetland parks distribution, but their distribution densities are different. South Jiangsu-North Zhejiang, East Hubei-North Hunan and Southwest Shandong are the three highdensity national wetland park distribution centers, while South Jiangsu and Northeast Shandong form high-density urban wetland park distributions. Finally, this paper discusses the factors that cause the situation in three aspects which include natural conditions, social economic conditions and cultural environment.

    Studies on Removal and Mechanisms of Cd(II) Ions from Aqueous Solution Using CMC-g-PAA/AM/ATP
    DENG Hongmei, ZHANG Zijun, XU Nan
    2016, 52(3):  545-552.  DOI: 10.13209/j.0479-8023.2016.066
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    In presence of the attapulgite, the absorbent carboxymethyl cellulose-g-poly(acrylic acid)/acrylamide /attapulgite (CMC-g-PAA/AM/ATP) was synthesized by solution grafting copolymerization of carboxymethyl cellulose, acrylic acid and acrylic amide with ammonim peroxodisulphate as an initiator and MBA as crosslink agent. CMC-g-PAA/AM/ATP was applied in the Cd(II) adsorption from aqueous solution. The influences of pH, initial Cd(II) concentration, reaction time, temperature and dosage on the adsorption were investigated. The adsorption capacity reached a high level when pH was in the range of 4.0-8.0. The reaction reached equilibrium within 40 min and the adsorption kinetics was better described by pseudo-second order equation. The reaction was an exothermic process. The as-prepared and Cd-loaded CMC-g-PAA/AM/ATP were characterized by Fourier transform infrared spectroscopy (FT-IR) and X-ray photoelectron spectroscopy (XPS) to identify the structure of the adsorbents, and verify the removal mechanisms. CMC-g-PAA/AM/ATP proved to be a promising candidate for the fast removal of Cd(II) from aqueous solution. The Cd(II) removal mechanisms by CMC-g-PAA/AM/ATP include electrostatic interaction, chelation and ion exchange.

    Effects of Land Use Pattern Change on Regional Scale Habitat Quality Based on InVEST Model—a Case Study in Beijing
    CHEN Yan, QIAO Fei, JIANG Lei
    2016, 52(3):  553-562.  DOI: 10.13209/j.0479-8023.2016.057
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    To study the effects of land use pattern change on habitat quality in the background of urbanization, InVEST model was applied to calculate the contributions of habitat threats (urban area, rural construction area, main roads and agriculture land) to habitat degradation, and to assess habitat quality changes between 1990 and 2010 in Beijing. The results showed that the most severe habitat degradation problems occurred in Haidian, Chaoyang, Shijingshan and Fengtai districts, Yongding River, Chaobai River, and the mountain-plain border area (at an elevation about 75-100 m). Agriculture lands had the largest effect on habitat degradation, followed by urban areas, rural construction areas and main roads. During these two decades, the contribution of agriculture lands decreased from 77.79% to 61.15%, but the contribution of urban areas increased from 18.10% to 31.54%. Between 1990 and 2000, habitat quality declined dramatically in Haidian, Chaoyang, Shijingshan and Fengtai districts, which were located at the rim of Dongcheng and Xicheng districts. The total habitat quality value decreased by 2.3%. During 2000 and 2010, the deterioration of habitat quality expanded to most of the plain areas. In the mountain area of Fangshan and the mountain-plain border area (at an elevation about 75-100 m) in Miyun, Huairou, Changping and Fangshan, the value decreased significantly. However, habitat quality had been restored notably in northern and western mountain areas. The total habitat quality value declined by 1.2%, which indicated that habitat deterioration had been mitigated to some extent compared with the last decade. For habitat conservation and urban planning in the future, more attention should be paid to mountain-plain border areas. The current study played an active role in land use policy-making and biodiversity conservation.

    Industrial Organization, Industrial Agglomeration and Chinese Manufacturing Pollution
    YANG Fan, ZHOU Yi, HE Canfei
    2016, 52(3):  563-573.  DOI: 10.13209/j.0479-8023.2016.058
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    This paper focuses on the influence external economies of scale brought by industrial agglomeration and internal economies of scale brought by industrial organization have on pollution emission intensity. This research takes SO2, soot, polluted water as the examples and two digits manufacturing industrial divisions as the research subjects. Through spatial distribution analysis and penal data econometric analysis during the time from 2005 to 2009, the authors find that the relationship between gini and pollution intensity is positive, state owned and group owned enterprises ratios are negative related to pollution intensity of SO2 and soot, while private and foreign investment enterprises ratios are positive related to pollution intensity. The result shows that industrial pollution is influenced by the trend of marketization, which suggests that the authority may improve the environmental regulations systems and the supervision power, and local government should improve the pollution dissolving facilities’ effectiveness and pollution control efforts within industrial clusters.

    Attentional Bias and Social Anxiety: Moderated by Interpretative Bias
    YU Hongyu, QIAN Mingyi, ZHOU Peng, YAO Nisha
    2016, 52(3):  574-580.  DOI: 10.13209/j.0479-8023.2016.030
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    To explore the moderating role of interpretative bias in the relation of attentional bias and social anxiety. In study 1, a positive attentional training program, using a modified dot-probe task, was used to modify the attentional bias in a nonclinical sample of students. After two days training, results revealed no different change on self-reported anxiety. The participants showed preference for positive information post-training, while avoidance pre-training in the 500 ms condition. Based on the founding of study 1, data collected from college students were used to investigate the relationship among attentional bias, interpretative bias and social anxiety by regression analysis in study 2. There was a significant interaction of interpretative bias by attentional bias scores, which meant the existence of moderating effect. Attentional bias can predict social anxiety under high interpretative bias condition, but not in individuals with low interpretative bias. The results provide a new perspective of interpretative bias to view the influences of attentional bias on social anxiety.

    Mechanism from Absence of Meaning to Meaning in Life: Moderated Mediation of Satisfaction of Psychological Need
    WANG Yu, CHEN Weiyi, GAN Yiqun
    2016, 52(3):  581-586.  DOI: 10.13209/j.0479-8023.2016.031
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    This study aimed to explore the mediation effect of search for meaning between absence of meaning and meaning in life, and tested the role of satisfaction of psychological need in this process via two-wave data. The sample consisted of 156 university students. Participants reported absence of meaning, search for meaning and psychological need satisfaction at time 1 and reported meaning in life at time 2. Results indicated that search for meaning played a partial mediating role between absence of meaning and meaning in life, and psychological need satisfaction moderated relationship between meaning thinking and meaning in life. Under low-level of psychological need satisfaction, search for meaning was strongly associated with meaning in life. With increased satisfaction of psychological need, positive effect of search for meaning on meaning in life become insignificant.