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| 1 | Recent progresses in mangrove conservation,restoration and research in China显示文摘Aims In this paper,we highlighted some key progresses in mangrove conservation,restoration and research in China during last two decades.Methods Based on intensive literature review,we compared the distribution and areas of existing mangroves among selected provinces of China,discussed the issues associated with mangrove conservation and restoration and highlighted major progresses on mangrove research conducted by key institutions or universities in China's Mainland,Hong Kong,Taiwan and Macao.Important findings The population boom and rapid economic developments have greatly reduced mangrove areas in China since 1980s,leaving only 22700 ha mangroves in China's Mainland in 2001.Chinese government has launched a series of programs to protect mangroves since 1980s and has established mangrove ecosystems as high-priority areas for improving environmental and living resource management.During last three decades,a total of 34 natural mangrove conservation areas have been established,which accounts for 80%of the total existing mangroves areas in China.Mangrove restoration areas in China' Mainland accounted for<7%of the total mangroves areas in 2002.A great deal of research papers on Chinese mangroves has been published in international journals.However,more systematic protection strategies and active restoration measurements are still urgently needed in order to preserve these valuable resources in China. | Luzhen Chen Wenqing Wang Yihui Zhang Guanghui Lin | 2009 | Journal of Plant Ecology2009，2，2： | 42 |
| 2 | Seismic response of underground utility tunnels: shaking table testing and FEM analysis显示文摘Underground utility tunnels are widely used in urban areas throughout the world for lifeline networks due to their easy maintenance and environmental protection capabilities. However, knowledge about their seismic performance is still quite limited and seismic design procedures are not included in current design codes. This paper describes a series of shaking table tests the authors performed on a scaled utility tunnel model to explore its performance under earthquake excitation. Details of the experimental setup are first presented focusing on aspects such as the design of the soil container, scaled structural model, sensor array arrangement and test procedure. The main observations from the test program, including structural response, soil response, soil-structure interaction and earth pressure, are summarized and discussed. Further, a finite element model (FEM) of the test utility tunnel is established where the nonlinear soil properties are modeled by the Drucker-Prager constitutive model; the master-slave surface mechanism is employed to simulate the soil-structure dynamic interaction; and the confining effect of the laminar shear box to soil is considered by proper boundary modeling. The results from the numerical model are compared with experiment measurements in terms of displacement, acceleration and amplification factor of the structural model and the soil. The comparison shows that the numerical results match the experimental measurements quite well. The validated numerical model can be adopted for further analysis. | Jiang Luzhen Chen Jun Li Jie | 2010 | Earthquake Engineering and Engineering Vibration2010，9，4： | 31 |
| 3 | Non-Darcy flow seepage characteristics of saturated broken rocks under compression with lateral constraint显示文摘sing an MTS816.03 test system and self-designed seepage apparatus,seepage tests of saturated broken rocks were conducted,and the influence of lithology,axial stress,grain size distribution and loading rate on seepage characteristics was analyzed.The results show that:(1) Under the same axial stress(12 MPa)the permeability of different lithologic samples increases in the order:gangue < mudstone < sand stone < limestone.The permeability of gangue is 3 magnitudes lower than that of limestone.The absolute value of the non-Darcy coefficient β increases in the order:limestone < sandstone < mudstone < gangue The non-Darcy coefficient β of limestone,which is positive,is 5 magnitudes lower than that of gangue.(2)With increasing axial stress,the permeability of saturated broken sandstone decreases,and the absolute value of the non-Darcy coefficient β increases.After the axial stress exceeds 12 MPa,the curves of perme ability and non-Darcy coefficient β all tend to be stable.(3) With increasing Talbol power exponent,the permeability increases,and the absolute value of the non-Darcy coefficient β decreases.(4) With increas ing loading,the permeability increases,and the absolute value of the non-Darcy coefficient β decreases When the loading rate is 0.5 kN/s,the non-Darcy coefficient β is positive. | Yu Bangyong Chen Zhanqing Ding Qile Wang Luzhen | 2016 | International Journal of Mining Science and Technology2016，26，6： | 2 |
| 4 | Linkages of flow regime and micro-topography:prediction for non-native mangrove invasion under sea-level rise显示文摘Flow regime is a key driver of invasive aquatic organisms,and the invasiveness of mangrove species may be simultaneously attributed to plant traits and flowing hydrological conditions at the estuary scale.We focused on hydrological and topographic conditions for a non-native mangrove species,Sonneratia apetala,in Zhangjiang Estuary of Fujian,China.A hydrological model and a micro-topographic model were used to predict its dispersal and early establishment,and field surveys and simulated experiments were integrated to estimate its future dispersal patterns.The mesohaline mudflat with a salinity of 8~10 PSU at the mangrove seaward edge was the most likely colonization area for S.apetala under current conditions.The south-western region of the estuary with native mangroves was the most likely area for its colonization according to the unstructured-grid finite-volume community ocean model(FVCOM)in September,when the largest tidal currents within a year and the maximum fruit maturity period occur.Approximately 42%of the mudflats throughout the whole estuary may be available for seedling establishment under the future sea-level rise RCP 4.5 scenarios compared with 44%for current establishment;however,the RCP 8.5 scenarios would significantly decrease seedling establishment by 2100 due to serious tidal inundation according to the micro-topographical model. | Luzhen Chen Hongyu Feng Xiaoxuan Gu Ying Dong Peng Cheng Xudong Guo Qiulian Lin Ting Tang Yihui Zhang Xudong Zhu Shengchang Yang | 2020 | Ecosystem Health and Sustainability2020，6，1： | 1 |
| 5 | Ordering of trees with a given bipartition by their energies and hosoya indices显示文摘 | Ye Luzhen Chen Rongsi | 2004 | Match Commun Math Comput Chem2004，52，： | 1 |
| 6 | Blue carbon sequestration following mangrove restoration:evidence from a carbon neutral case in China显示文摘Sequestration of blue carbon(C)in mangrove plantations depends on site characteristics and plantation management.This study evaluated the effects of plantation management on C sequestration at a C-neutral site in Xiamen,China.A field study was conducted on 10-year-old Sonneratia apetala and Kandelia obovata plantations(mono-Sa,mono-Ko)and a 15-year-old mixed plantation-.We found that mono-Ko had a significantly higher ecosystem C sequestration rate(3.32±0.62 kg C m^(-2)yr^(-1))than others when planted in the indirect shade of pioneer species.As a non-native species,Sonneratia performed better(0.57±0.01 kg C m^(-2)yr^(-1))when planted with Kandelia than in monotypic plantations.The temporary and long-term certified emission reduction(tCER and lCER)of the 12.98 ha mono-Ko was 4103.89 and 3693.50 net CO_(2)-e within 10 years,respectively.A literature review was conducted to show the compatibility of this study with other natural and plantation sites of China and Bangladesh(the native habitat for Sonneratia).The C sequestration of Sonneratia plantation sites in China is comparable with those in Bangladesh.However,the soil C accumulation rate for a Sonneratia monotypic plantation in Bangladesh decreased with age,yet the same did not occur in the plantations of China. | Sourav Bagchi Ratul Xiaoxuan Gu Peiyang Qiao Febrina Wulanda Sagala Shu Nan Nazrul Islam Luzhen Chen | 2022 | Ecosystem Health and Sustainability2022，8，1： | 0 |
| 7 | Study of Ultra-low Altitude Radiation Detector显示文摘The ultra-low altitude radiation detectors,under the major or the catastrophic nuclear accident,aim at implementing the emergency radiation monitoring.In the conditions of the traffic block or the high level of radiation dose rate after nuclear accident happening,when the monitoring personnel cannot enter the accident occurred area,the ultra-low altitude radiation detectors can | GUO Luzhen LIU Yang LUO Zhiping PANG Hongchao CHEN Ling | 2017 | Annual Report of China Institute of Atomic Energy2017，，1： | 0 |
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