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| 1 | Spatial distribution of heavy metals(Cu, Pb, Zn, and Cd)in sediments of a coastal wetlands in eastern Fujian, China显示文摘We investigated the spatial distribution(horizontal and vertical concentrations) of copper(Cu),lead(Pb), zinc(Zn), and cadmium(Cd) in five wetland types(mudflat, aquaculture wetland, water area, farmland wetland and mangrove) from three areas(Ningde, Fuding,and Xiapu), China. Cu concentrations in five wetland types descended in the order: farm wetland, mudflat, aquaculture,water area and mangrove. Pb concentrations decreased in the order: aquaculture, mangrove, farm wetland, mudflat,and water area. Zn content decreased in the order: farm wetland, water area, aquaculture, mudflat and mangrove,and Cd content decreased as follows: mangrove, aquaculture, water area, mudflat, and farm wetland. Comparison of the concentrations of the same heavy metals in different areas showed that the highest Cu(63.75 mg kg^-1) and Zn(152.32 mg kg^-1) concentrations occurred in Ningde coastal wetlands; Pb(110.58 mg kg^-1) and Cd(2.81 mg kg^-1) contents were highest in Fuding wetlands,and the average contents of all heavy metals were very low in Xiapu wetlands. Examination of the vertical distribution showed that the Cu content was high in all mudflat layers;Pb and Cd concentrations were highest in aquaculture and mangrove wetlands, respectively, and Zn content was highest in farm wetlands. The spatial distribution of Cu and Zn contents for different areas decreased as follows:Ningde [ Fuding [ Xiapu, for Pb and Cd were most concentrated in Fuding coastal wetlands. Concentrations of Zn and Cu were highly correlated, while Zn and Cu were not significantly correlated with Pb. | Lili Zhao Weibin You Haiqing Hu Wei Hong Xiaojuan LIAO Shihong Xiao Ren Wang Jinbiao Cai Xuncheng Fan Yong Tan Dongjin He | 2015 | Journal of Forestry Research2015，26，3： | 8 |
| 2 | An active damping vibration control system for wind tunnel models显示文摘In wind tunnels, long cantilever sting support systems with low structural damping encounter flow separation and turbulence during wind tunnel tests, which results in destructive low-frequency and big-amplitude resonance, leading to data quality degradation and test envelope limitation. To ensure planed test envelope and obtain high-quality data, an active damping vibration control system independent of balance signal based on stackable piezoelectric actuators and velocity feedback using accelerometer, is proposed to improve the support stability and wind tunnel testing safety in transonic wind tunnel. Meanwhile, a design of powerful sting-root embedded active damping device is given and an active vibration control method is presented based on the mechanism analysis of aircraft model vibration. Furthermore, a self-adaptive fuzzy Proportion Differentiation(PD) control model is proposed to realize control parameters adjustment automatically for various testing conditions. Besides, verification tests are performed in laboratory and a continuous transonic wind tunnel. Experimental results indicate that the aircraft model does not vibrate obviously from -4° to 11° at Ma = 0.6, the number of useable angle-of-attack has increased by 7° at Ma = 0.6 and 5° at Ma = 0.7 respectively, satisfying the requirements of practical wind tunnel tests. | Wei LIU Mengde ZHOU Zhengquan WEN Zhuang YAO Yu LIU Shihong WANG Xiaochun CUI Xiao LI Bing LIANG Zhenyuan JIA | 2019 | Chinese Journal of Aeronautics2019，32，9： | 8 |
| 3 | Rhizosphere and bulk soil enzyme activities in a Nothotsuga longibracteata forest in the Tianbaoyan National Nature Reserve,Fujian Province,China显示文摘The rhizosphere, distinct from bulk soil, is defined as the volume of soil around living roots and influenced by root activities. We investigated protease,invertase, cellulase, urease, and acid phosphatase activities in rhizosphere and bulk soils of six Nothotsuga longibracteata forest communities within Tianbaoyan National Nature Reserve, including N. longibracteata + either Phyllostachys pubescens, Schima superba, Rhododendron simiarum, Cunninghamia lanceolata, or Cyclobalanopsis glauca, and N. longibracteata pure forest. Rhizosphere soils possessed higher protease, invertase, cellulase, urease,and acid phosphatase activities than bulk soils. The highest invertase, urease, and acid phosphatase activities were observed in rhizosphere samples of N. longibracteata+ S.superba. Protease was highest in the N. longibracteata + R. simiarum rhizosphere, while cellulase was highest in the pure N. longibracteata forest rhizosphere.All samples exhibited obvious rhizosphere effects on enzyme activities with a significant linear correlation between acid phosphatase and cellulase activities(p \ 0.05) in rhizosphere soils and between protease and acid phosphatase activities(p \ 0.05) in bulk soils. A principal component analysis, correlating 13 soil chemical properties indices relevant to enzyme activities, showed that protease, invertase, acid phosphatase, total N, and cellulase were the most important variables impacting rhizosphere soil quality. | Shihong Xiao Huiming You Weibin You Jinshan Liu Changtang Cai Jianqin Wu Zhirong Ji Shihua Zhan Zhesen Hu Zhongrui Zhang Dongjin He | 2017 | Journal of Forestry Research2017，28，3： | 7 |
| 4 | Effects of stocking density on the growth and immunity of Atlantic salmon salmo salar reared in recirculating aquaculture system(RAS)显示文摘Atlantic salmon reared in recirculating aquaculture system(RAS) may lead to inappropriately high stocking density, because ?sh live in a limited space. Finding the suitable stocking density of Atlantic salmon reared in RAS is very important for RAS industry. In this paper, the in?uence of stocking density on growth and some stress related physiological factors were investigated to evaluate the ef fects of stocking density. The ?sh were reared for 220 days at ?ve densities(A: 24 kg/m^3; B: 21 kg/m^3; C: 15 kg/m^3; D: 9 kg/m^3 and E: 6 kg/m^3). The results show that 30 kg/m^3 might be the maximum density which RAS can af ford in China. The stocking densities under 30 kg/m^3 have no ef fect on mortality of Atlantic salmon reared in RAS. However, the speci?c growth rate(SGR), ?nal weight and weight gain in the high density group were signi?cantly lower than the lower density groups and middle density groups. Moreover, feed conversion rate(FCR) had a negative correlation with density. Plasma hormone T_3 and GH showed signi?cant decrease with the increase of the stocking density of the experiment. Furthermore, thyroid hormone(T 3), GH(growth hormone) activities were decreased with stocking density increase. However, plasma cortisol, GOT(glutamic oxalacetic transaminase) and GPT(glutamic pyruvic transaminase) activities were increase with stocking density increase. And the stocking density has no ef fects on plasma lysozyme of Atlantic salmon reared in RAS. These investigations would also help devise effcient ways to rear adult Atlantic salmon in China and may, in a way, help spread salmon mariculture in China. | WANG Yanfeng CHI Liang LIU Qinghua XIAO Yongshuang MA Daoyuan XIAO Zhizhong XU Shihong LI Jun | 2019 | Journal of Oceanology and Limnology2019，37，1： | 2 |
| 5 | Empirical research on construction of a measurement framework for tourism carbon emission in China显示文摘According to the logic process of carbon reduction in China which arises from the measurement to reduction,from reduction to offsetting,the measurement of carbon emission in the tourism industry was the first and key step.Based on the life cycle assessment theory and input-output analysis,this article used economic and environmental measurement technologies,The System of National Accounting(SNA),Tourism Satellite Account(TSA),System of Integrated Environment and Economic Accounting(SEEA),and so on,and built up a top-down carbon emission analysis framework for the tourism industry and estimated carbon emission of the tourism industry in China in 2007.The finding showed that the total carbon emission of the tourism industry in China in 2007 was 169.78 million tons,covering 2.71%of carbon emission of all industries in China in 2007,and 2.44%of the total carbon emission in China in 2007.The direct carbon emission of the tourism industry in China in 2007 was 73.56 million tons,including transportation(50.14 million tons),sightseeing(1.33 million tons),lodging(4.19 million tons),accommodation(4.73 million tons),shopping(8.14 million tons),entertainment(0.67 million tons),communication(0.45 million tons),and others(3.90 million tons).The indirect carbon emission of the tourism industry in China in 2007 was 96.23 million tons,mostly contributed by coking,gas,and petroleum processing industries,transportation and warehousing industry,machinery and equipment manufacturing industry,and food manufacturing and tobacco processing industry,which covered 57%. | Yongde Zhong Shengyi Shi Shihong Li Fen Luo Weiliang Luo Qiong Xiao | 2015 | Chinese Journal of Population,Resources and Environment2015，13，3： | 1 |
| 6 | Collaborative manufacturing technologies of structure shape and surface integrity for complex thin-walled components of aero-engine:Status,challenge and tendency显示文摘Presently,the service performance of new-generation high-tech equipment is directly affected by the manufacturing quality of complex thin-walled components.A high-efficiency and quality manufacturing of these complex thin-walled components creates a bottleneck that needs to be solved urgently in machinery manufacturing.To address this problem,the collaborative manufacturing of structure shape and surface integrity has emerged as a new process that can shorten processing cycles,improve machining qualities,and reduce costs.This paper summarises the research status on the material removal mechanism,precision control of structure shape,machined surface integrity control and intelligent process control technology of complex thin-walled components.Numerous solutions and technical approaches are then put forward to solve the critical problems in the high-performance manufacturing of complex thin-wall components.The development status,challenge and tendency of collaborative manufacturing technologies in the high-efficiency and quality manufacturing of complex thin-wall components is also discussed. | Biao ZHAO Wenfeng DING Zhongde SHAN Jun WANG Changfeng YAO Zhengcai ZHAO Jia LIU Shihong XIAO Yue DING Xiaowei TANG Xingchao WANG Yufeng WANG Xin WANG | 2023 | Chinese Journal of Aeronautics2023，36，7： | 1 |
| 7 | The viability, melanophore and embryo genesis of first- and second-generation hybrids between Paralichthys olivaceus and P. dentatus显示文摘 | Juan Sui Qinghua Liu Zhizhong Xiao Daoyuan Ma Shihong Xu Tao He Yifan Liu Yongshuang Xiao Jun Li | 2013 | Marine Biology Research2013，，2： | 1 |
| 8 | Robust Background Subtraction Method via Low-Rank and Structured Sparse Decomposition显示文摘Background subtraction is a challenging problem in surveillance scenes. Although the low-rank and sparse decomposition(LRSD) methods offer an appropriate framework for background modeling, they fail to account for image's local structure, which is favorable for this problem. Based on this, we propose a background subtraction method via low-rank and SILTP-based structured sparse decomposition, named LRSSD. In this method, a novel SILTP-inducing sparsity norm is introduced to enhance the structured presentation of the foreground region. As an assistance, saliency detection is employed to render a rough shape and location of foreground. The final refined foreground is decided jointly by sparse component and attention map. Experimental results on different datasets show its superiority over the competing methods, especially under noise and changing illumination scenarios. | Minsheng Ma Ruimin Hu Shihong Chen Jing Xiao Zhongyuan Wang | 2018 | China Communications2018，15，7： | 1 |
| 9 | A cross-layer adaptive transmission scheme combined with SR-ARQ over correlated fading channels 显示文摘 | XIAO Junfeng ZOU Shihong QIU Jing | 2008 | Computers and Electrical Engineering2008，34，4： | 1 |
| 10 | Prevalence and characteristics of macrosomia in the first and subsequent pregnancy: a multi-center retrospective study显示文摘To the Editor:Macrosomia is of growing prevalence and concern worldwide.In China,there has been a marked increase in the prevalence of macrosomia over the past few decades as a result of economic development and improvements in living standards. | Juan Juan Huixia Yang Yumei Wei Geng Song Rina Su Xu Chen Ruiqin Shan Jianying Yan Mei Xiao Ying Li Shihong Cui Xianlan Zhao Shangrong Fan Ling Feng Meihua Zhang Yuyan Ma Zishan You Haixia Mengn Haiwei Liu Jingxia Sun Yan Cai Kejia Hu | 2022 | Chinese Medical Journal2022，，12： | 1 |
| 11 | Sampled-data control through model-free reinforcement learning with effective experience replay显示文摘Reinforcement Learning(RL)based control algorithms can learn the control strategies for nonlinear and uncertain environment during interacting with it.Guided by the rewards generated by environment,a RL agent can learn the control strategy directly in a model-free way instead of investigating the dynamic model of the environment.In the paper,we propose the sampled-data RL control strategy to reduce the computational demand.In the sampled-data control strategy,the whole control system is of a hybrid structure,in which the plant is of continuous structure while the controller(RL agent)adopts a discrete structure.Given that the continuous states of the plant will be the input of the agent,the state–action value function is approximated by the fully connected feed-forward neural networks(FCFFNN).Instead of learning the controller at every step during the interaction with the environment,the learning and acting stages are decoupled to learn the control strategy more effectively through experience replay.In the acting stage,the most effective experience obtained during the interaction with the environment will be stored and during the learning stage,the stored experience will be replayed to customized times,which helps enhance the experience replay process.The effectiveness of proposed approach will be verified by simulation examples. | Bo Xiao H.K.Lam Xiaojie Su Ziwei Wang Frank P.-W.Lo Shihong Chen Eric Yeatman | 2023 | Journal of Automation and Intelligence2023，2，1： | 0 |
| 12 | Structural Analysis and Life Prediction of Thrust Chambers For Hydrogen-Oxygen Rocket Engines显示文摘After several trial runs,penetrating cracks appeared in the thrust chamber wall of a hydrogen-oxygen rocket engine,which will affect the service life and performance of the engine.It is necessary to reduce the wall heat flux by injection element mixture ratio biasing or propellant films to prolong the life of the liner wall.In this paper,the deformation of three types of inner walls was calculated under cyclic mechanical loading,and the stress-strain response and the fatigue life of the inner walls were compared.The results show that the bottom midpoint of the gas side chan-nel,with the largest residual strain,is the most prone to failure.In addition,the adoption of injection element mixture ratio biasing or film cooling can greatly increase the life of the inner wall,and the improvement effect of the two mea-sures is similar. | LIU Xiao LI Yongjiang WU Youliang ZHAO Shihong TIAN Yuan SUN Bing | 2023 | Aerospace China2023，24，3： | 0 |
| 13 | Effects of dissolved oxygen on intestinal bacterial community and immunity of Atlantic salmon Salmo salar显示文摘Dissolved oxygen(DO)is one of most important factors which affect wide range physiologic features of including immune responses and intestinal bacterial community.However,the underlying mechanisms remain enigmatic.To address this question,the intestinal bacterial community compositions and the immune features of Atlantic salmon(Salmo salar)grown in recirculating aquaculture systems(RAS)were characterized.Fish were reared under different DO saturation levels,e.g.,200% saturation named high group(H),100%saturation named control group(CK),and 60%saturation named lower group(L).Large variations in the operational taxonomic units(OTUs)frequency distribution for the intestinal bacterial community of Atlantic salmon were observed.The intestinal bacterial community of all groups was dominated mainly by three phyla,e.g.,Proteobacteria.Firmicutes,and Bacteroidetes.Interestingly,Acinetobacter baumannii,an opportunistic pathogen of salmon was increased significantly in L group.We further monitored the immunity features of fish under different DO levels.The results show that leucocyte number,cortisol level,the expressions of interleukin-1β(IL-1β),Toll-like receptor 4(TLR4),and nucleotide-binding oligomerization domain like protein 2(NOD2)were higher at significant levels in the L group than those in the other two groups.TLR4 and NOD2 are usually related with the bacterial infections;therefore,it is reasonable to believe that the stronger immune responses observed in the L group might be related with the higher abundance of A.baumannii in the inte stine of Atlantic salmon.Overall,these findings demonstrated that low DO level may induce stronger immunity responses in Atlantic salmon. | Shihong XU Yanfeng WANG Caixia GAO Sarath BABU V Jun LI Qinghua LIU Zhizhong XIAO Yingxuan XU Chunyan ZHAO Li LIN Liang CHI | 2023 | Journal of Oceanology and Limnology2023，41，1： | 0 |
| 14 | Subsea Compensation of Pressure Based on Reducer Bellows显示文摘In this study,the pressure compensation mechanism of a reducer bellows is analyzed.This device is typically used to reduce the size of undersea instruments and improve related pressure resistance and sealing capabilities.Here,its axial stiffness is studied through a multi-fold approach based on theory,simulations and experiments.The results indicate that the mechanical strength of the reducer bellows,together with the oil volume and temperature are the main factors influencing its performances.In particular,the wall thickness,wave number,middle distance,and wave height are the most influential parameters.For a certain type of reducer bellows,the compensation capacity attains a maximum when the wave number ratio is between 6:6 and 8:4,the wall thickness is 0.3 mm,and the wave height is between 4–5 mm and 5–6 mm.Moreover,the maximum allowable ambient pres-sure of the optimized reducer bellows can reach 62.6 MPa without failure,and the maximum working water depth is 6284 m. | Shihong Xiao Shichao Zhou Linlin Yue Xianyou He Maolin Xiang | 2023 | Fluid Dynamics & Materials Processing2023，19，10： | 0 |
| 15 | The ontogeny of acidic digestive tract in larval turbot Scophthalmus maximus based on H+/K+-ATPase and pepsinogen显示文摘Acidic digestion is an important digestive process of marine fish.In fish stomach,two enzymes are involved in the secretion of hydrochloric acid(HCl)and proteomic digestion:H^(+)/K^(+)-ATPase and pepsinogen.However,the starting of digestive function in fish is still unclear.To reveal the details of acidic digestion of turbot Scophthalmus maximus in early development,a 40 day of turbot larvae culture was conducted.The H^(+)/K^(+)-ATPase gene from the turbot S.maximus(smH^(+)/K^(+)-ATPase)was identified and characterized.Based on our previous discription on pepsinogen of turbot S.maximus,we combined pepsinogen and H^(+)/K^(+)-ATPase and analyzed the mechanism of acidic digestion in turbot.Results show that the spatial and temporal expression profiles of H^(+)/K^(+)-ATPase agreed with pepsinogen A and C in turbot,indicating a synergetic action between H^(+)/K^(+)-ATPase and pepsinogen during the acidic digestion process.In addition,the turbot juveniles showed a faster growth after the expressions of H^(+)/K^(+)-ATPase gene and pepsinogen gene,demonstrating that pepsin had a higher digestive efficiency,for which a compound diet should be provided to the fish from Day 22 onward.This study provided a reference for biology research and aquaculture of turbot and other marine fishes. | Yanfeng WANG Shulan LIU Teng GUO Shihong XU Qinghua LIU Zhizhong XIAO Daoyuan MA Jun LI Liang CHI | 2023 | Journal of Oceanology and Limnology2023，41，3： | 0 |
| 16 | Changes of melatonin and its receptors in synchronizing turbot(Scophthalmus maximus)seasonal reproduction and maturation rhythm显示文摘In most fish,reproduction is seasonal or periodic under the suitable conditions.In turbot(Scophthalmus maximus)farms,one of the most economically important marine flatfish species,changes in daylength could cause changes in the spawning time.In this study,to characterize the regulation of reproductive physiology following light signals,three melatonin receptors(Mtnr)investigated in turbot were named sm Mtnr1,sm Mtnr2,and sm Mtnr1 c.Distinct expression profiles demonstrated that Mtnr m RNAs were concentrated in the brain(as detected in the hypothalamus(Hy)and mesencephalon(Me)),gonad and eye.The most abundant Mtnr1 and Mtnr2 m RNA expression levels were detected in the central nervous system at the beginning of the breeding season,suggesting that Mtnr1 and Mtnr2 may play vital roles in the regulation of turbot gonadal development.In addition,the melatonin profiles gradually increased and reached to the highest level at the spawning stage,indicating that melatonin is a potent hormone in the regulation of fish oocyte growth and maturation.The results of this study suggested that melatonin is the primary factor that transduces the light signal and regulates the physiological functions of turbot seasonal reproduction.Moreover,the results of this study may establish a foundation for further research seeking to identify fish melatonin receptors involved in the gonadal development and gamete maturation. | Chunyan Zhao Shihong Xu Yifan Liu Chengcheng Feng Yongshuang Xiao Yanfeng Wang Qinghua Liu Jun Li | 2022 | Acta Oceanologica Sinica2022，41，1： | 0 |
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