Search results for: Yuyuan Li

Items from 1 to 20 out of 44 results

article

Diversity and distribution of bacteria in a multistage surface flow constructed wetland to treat swine wastewater in sediments

Xi Li, Yuyuan Li, Yong Li, Jinshui Wu

Applied Microbiology and Biotechnology > 2018 > 102 > 24 > 10755- 10765

Managing waste produced from swine farming operations is a significant agricultural and environmental challenge. Confined animal feeding operations continually generate large amounts of animal waste, which necessitates adequate waste management systems. This study examines the use of multistage surface flow constructed wetlands (SFCWs) to treat pig farm sewage. The wastewater removal rate, sediment...

article

Agro-farming systems determine phosphorus budget characteristics at the farm and catchment scales in subtropical China

Meihui Wang, Chujie Liao, Yi Wang, Xinliang Liu, more

Nutrient Cycling in Agroecosystems > 2018 > 112 > 2 > 179-196

Agricultural and economic activities may profoundly determine phosphorus (P) budget characteristics that affect environmental quality; therefore, P budget characteristics were investigated at the farm and catchment scales, and the total-phosphorus (TP) concentrations in stream water were observed to examine their relationships in eight Chinese subtropical catchments. The results showed that chemical...

article

Seasonality distribution of the abundance and activity of nitrification and denitrification microorganisms in sediments of surface flow constructed wetlands planted with Myriophyllum elatinoides during swine wastewater treatment

Xi Li, Miaomiao Zhang, Feng Liu, Liang Chen, more

Bioresource Technology > 2018 > 248 > PB > 89-97

Surface flow constructed wetlands (SFCWs) planted with Myriophyllum elatinoides for treatment of swine wastewater were examined to evaluate the effect of season, segment (site S1, S2, and S3), and treatment (100mgL⁻¹ TN, T1; 300mgL⁻¹ TN, T2; 500mgL⁻¹ TN, T3) on the activity, and abundances of nitrifying and, denitrifying microorganisms, and on the abundance of sediment bacteria. The activity and abundances...

article

Stabilization of Hybrid Systems by Feedback Control Based on Discrete‐Time State and Mode Observations

Yuyuan Li, Jianqiu Lu, Xuerong Mao, Qinwei Qiu

Asian Journal of Control > 19 > 6 > 1943 - 1953

Recently, a kind of feedback control based on discrete‐time state observations was proposed to stabilize continuous‐time hybrid stochastic systems in the mean‐square sense. We find that the feedback control there still depends on the continuous‐time observations of the mode. However, it usually costs to identify the current mode of the system in practice. So we can further improve the control to reduce...

article

Bacterial community dynamics in a Myriophyllum elatinoides purification system for swine wastewater in sediments

Xi Li, Miaomiao Zhang, Feng Liu, Yuyuan Li, more

Applied Soil Ecology > 2017 > 119 > C > 56-63

Constructed wetlands are important ecological tools for treating municipal, industrial, and agricultural wastewater. Terminal restriction fragment length polymorphisms and clone libraries were employed to determine the variation in bacterial community diversity and structure from a Myriophyllum elatinoides purification system used to treat different concentrations of swine wastewater. Experiments...

article

Robust stabilization of hybrid uncertain stochastic systems by discrete‐time feedback control

Yuyuan Li, Jianqiu Lu, Chunhai Kou, Xuerong Mao, more

Optimal Control Applications and Methods > 38 > 5 > 847 - 859

This paper aims to stabilize hybrid stochastic differential equations with norm‐bounded uncertainties by feedback controls based on the discrete‐time observations of both state and mode. The control structure appears only in the drift part (the deterministic part) of a stochastic differential equations, and the controlled system will be robustly exponentially stable in mean square. Our stabilization...

article

Robust stabilization of hybrid uncertain stochastic systems with time-varying delay by discrete-time feedback control

Yuyuan Li, Chunhai Kou

Advances in Difference Equations > 2017 > 2017 > 1 > 1-17

This paper is concerned with the robust stabilization problem for a class of continuous-time hybrid uncertain stochastic systems with time-varying delay. Our attention is focused on the design of a feedback controller based on discrete-time state observations such that, for all admissible uncertainties, the closed-loop system is robustly exponentially stable in the mean square, independent of the...

article

A novel fluorescent chemosensor based on a rhodamine 6G derivative for the detection of Pb2+ ion

Jun Wan, Kun Zhang, Chao Li, Yuyuan Li, more

Sensors and Actuators B: Chemical > 2017 > 246 > C > 696-702

A new selective fluorescent chemosensor based on rhodamine 6G derivative (R1) has been designed and synthesized, which displayed highly selective and sensitive detecting for lead ion in aqueous solution. Sensor R1 was selective toward Pb²⁺ ion by a light yellow to pink change for the visual detection of Pb²⁺ ion. The fluorescence recognition processes of Pb²⁺ was based on a binding induced ring-opening...

article

Rice agriculture impacts catchment hydrographic patterns and nitrogen export characteristics in subtropical central China: a paired-catchment study

Yi Wang, Xinliang Liu, Hua Wang, Yong Li, more

Environmental Science and Pollution Research > 2017 > 24 > 18 > 15700- 15711

Increased nitrogen (N) concentrations in water bodies have highlighted issues regarding nutrient pollution in agricultural catchments. In this study, the ammonium-N (NH₄⁺-N), nitrate-N (NO₃⁻-N), and total N (TN) concentrations were observed in the stream water and groundwater of two contrasting catchments (named Tuojia and Jianshan) in subtropical central China from 2010 to 2014, to determine the...

article

Geographic distribution of archaeological sites and their response to climate and environmental change between 10.0–2.8 ka BP in the Poyang Lake Basin, China

Jiajia Xu, Yulian Jia, Chunmei Ma, Cheng Zhu, more

Journal of Geographical Sciences > 2016 > 26 > 5 > 603-618

The temporal-spatial geographic distribution of archaeological sites and its feature between 10.0–2.8 ka BP (ka BP= thousands of years before 0 BP, where “0 BP” is defined as the year AD 1950) were determined, based on GIS spatial analysis in the Poyang Lake Basin. The relationship between geographic distribution of sites of different periods under subsistence existence of ancient civilizations, climate...

article

Rice agriculture increases base flow contribution to catchment nitrate loading in subtropical central China

Yi Wang, Xinliang Liu, Yong Li, Feng Liu, more

Agriculture, Ecosystems & Environment > 2015 > 214 > C > 86-95

Base flow is recognized as an important hydrological pathway for NO₃⁻–N export, however, the base flow contribution to NO₃⁻–N loading in rice agriculture catchments remains unknown. In this study, stream discharge and NO₃⁻–N concentration were observed in two contrasting rice agriculture catchments (named Tuojia and Jianshan) in subtropical central China between November 2010 and December 2013, to...

article

Changes of ubiquitin C-terminal hydrolase-L1 levels in serum and urine of patients with white matter lesions

Yuyuan Li, Yang Sun, Jian Li, Zhe Wang, more

Journal of the Neurological Sciences > 2015 > 357 > 1-2 > 215-221

Ubiquitin carboxy-terminal hydrolase-L1 (UCH-L1) has been established as a potential biomarker of neuronal damage. There is not much information about the effects of white matter lesions (WMLs) on serum and urine UCH-L1 levels in white matter disease patients. This study was aimed to assess whether serum or urine UCH-L1 levels are a reliable marker of brain damage in patients with WMLs.Serum and urine...

article

Serum ubiquitin C-terminal hydrolase L1 as a biomarker for traumatic brain injury: a systematic review and meta-analysis

Jian Li, Chao Yu, Yang Sun, Yuyuan Li

American Journal of Emergency Medicine > 2015 > 33 > 9 > 1191-1196

Serum ubiquitin C-terminal hydrolase L1 (UCH-L1) has been proposed as a biomarker of traumatic brain injury (TBI). However, previous studies on levels of UCH-L1 in serum remain inconsistent. This systematic review and meta-analysis were conducted on observational studies that reported the association between serum UCH-L1 levels and TBI.Studies were identified by searching PubMed and ISI Web of Science...

article

Using Ultrasonic Transient Elastometry (FibroScan) to Predict Esophageal Varices in Patients with Viral Liver Cirrhosis

Zhongwei Hu, Yuyuan Li, Chuo Li, Chunming Huang, more

Ultrasound in Medicine & Biology > 2015 > 41 > 6 > 1530-1537

The correlation between liver stiffness (LS), measured by ultrasonic transient elastometry (FibroScan), and the presence and severity of esophageal varices (EV) in patients with viral cirrhosis of the liver has not been well documented to date. The study described here investigated the value of using FibroScan to predict EV. Patients with cirrhosis (200 patients: 167 cases caused by hepatitis B virus...

article

Conserved termini and adjacent variable region of Twortlikevirus Staphylococcus phages

Xianglilan Zhang, Huaixing Kang, Yuyuan Li, Xiaodong Liu, more

Virologica Sinica > 2015 > 30 > 6 > 433-440

Methicillin-resistant Staphylococcus aureus (MRSA) is an increasing cause of serious infection, both in the community and hospital settings. Despite sophisticated strategies and efforts, the antibiotic options for treating MRSA infection are narrowing because of the limited number of newly developed antimicrobials. Here, four newly-isolated MRSA-virulent phages, IME-SA1, IMESA2, IME-SA118 and IME-SA119,...

article

Intensive rice agriculture deteriorates the quality of shallow groundwater in a typical agricultural catchment in subtropical central China

Yi Wang, Yuyuan Li, Yong Li, Feng Liu, more

Environmental Science and Pollution Research > 2015 > 22 > 17 > 13278- 13290

High nitrogen (N) concentrations in rural domestic water supplies have been attributed to excessive agricultural N leaching into shallow groundwater systems; therefore, it is important to determine the impact of agriculture (e.g., rice production) on groundwater quality. To understand the impact of agricultural land use on the N concentrations in the shallow groundwater in subtropical central China,...

article

Characteristics of nitrogen loading and its influencing factors in several typical agricultural watersheds of subtropical China

Yuyuan Li, Junxia Jiao, Yi Wang, Wen Yang, more

Environmental Science and Pollution Research > 2015 > 22 > 3 > 1831-1840

Increasingly, the characteristics of nitrogen (N) loading have been recognized to be critical for the maintenance and restoration of water quality in agricultural watersheds, in response to the spread of water eutrophication. This paper estimates N loading and investigates its influencing factors in ten small watersheds variously dominated by forest and agricultural land use types in the subtropics...

article

TMDL for phosphorus and contributing factors in subtropical watersheds of southern China

Cen Meng, Yuyuan Li, Yi Wang, Wen Yang, more

Environmental Monitoring and Assessment > 2015 > 187 > 8 > 1-15

Water eutrophication, particularly that caused by phosphorus runoff, is of major concern in China due to the serious threats it poses to watershed environments. We investigated one forested and nine agricultural watersheds with areas of 9–5212 ha in a hilly region of Hunan Province in a subtropical region of southern China from 2010 to 2012 to study total phosphorus (TP) loads and contributing factors...

article

Accelerated Partial Hepatectomy–Induced Liver Cell Proliferation Is Associated with Liver Injury in Nur77 Knockout Mice

Ying Hu, Qi Zhan, Hui-Xin Liu, Thinh Chau, more

The American Journal of Pathology > 2014 > 184 > 12 > 3272-3283

Nur77, encoded by Nr4a1 (alias Nur77), plays roles in cell death, survival, and inflammation. To study the role of Nur77 in liver regeneration, wild-type (WT) and Nur77 knockout (KO) mice were subjected to standard two-thirds partial hepatectomy (PH). Nur77 mRNA and protein levels were markedly induced at 1 hour after PH in WT livers, coinciding with ERK1/2 activation. Surprisingly, Nur77 KO mice...

article

Contribution of atmospheric nitrogen deposition to diffuse pollution in a typical hilly red soil catchment in southern China

Jianlin Shen, Jieyun Liu, Yong Li, Yuyuan Li, more

Journal of Environmental Sciences > 2014 > 26 > 9 > 1797-1805

Atmospheric nitrogen (N) deposition is currently high and meanwhile diffuse N pollution is also serious in China. The correlation between N deposition and riverine N export and the contribution of N deposition to riverine N export were investigated in a typical hilly red soil catchment in southern China over a two-year period. N deposition was as high as 26.1 to 55.8kgN/(ha·yr) across different land...

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INFONA - science communication portal

Search results for: Yuyuan Li

Diversity and distribution of bacteria in a multistage surface flow constructed wetland to treat swine wastewater in sediments

Agro-farming systems determine phosphorus budget characteristics at the farm and catchment scales in subtropical China

Seasonality distribution of the abundance and activity of nitrification and denitrification microorganisms in sediments of surface flow constructed wetlands planted with Myriophyllum elatinoides during swine wastewater treatment

Stabilization of Hybrid Systems by Feedback Control Based on Discrete‐Time State and Mode Observations

Bacterial community dynamics in a Myriophyllum elatinoides purification system for swine wastewater in sediments

Robust stabilization of hybrid uncertain stochastic systems by discrete‐time feedback control

Robust stabilization of hybrid uncertain stochastic systems with time-varying delay by discrete-time feedback control

A novel fluorescent chemosensor based on a rhodamine 6G derivative for the detection of Pb2+ ion

Rice agriculture impacts catchment hydrographic patterns and nitrogen export characteristics in subtropical central China: a paired-catchment study

Geographic distribution of archaeological sites and their response to climate and environmental change between 10.0–2.8 ka BP in the Poyang Lake Basin, China

Rice agriculture increases base flow contribution to catchment nitrate loading in subtropical central China

Changes of ubiquitin C-terminal hydrolase-L1 levels in serum and urine of patients with white matter lesions

Serum ubiquitin C-terminal hydrolase L1 as a biomarker for traumatic brain injury: a systematic review and meta-analysis

Using Ultrasonic Transient Elastometry (FibroScan) to Predict Esophageal Varices in Patients with Viral Liver Cirrhosis

Conserved termini and adjacent variable region of Twortlikevirus Staphylococcus phages

Intensive rice agriculture deteriorates the quality of shallow groundwater in a typical agricultural catchment in subtropical central China

Characteristics of nitrogen loading and its influencing factors in several typical agricultural watersheds of subtropical China

TMDL for phosphorus and contributing factors in subtropical watersheds of southern China

Accelerated Partial Hepatectomy–Induced Liver Cell Proliferation Is Associated with Liver Injury in Nur77 Knockout Mice

Contribution of atmospheric nitrogen deposition to diffuse pollution in a typical hilly red soil catchment in southern China

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