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Photo-production of dissolved inorganic carbon from dissolved organic matter in contrasting coastal waters in the southwestern Taiwan Strait, China

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Journal of Environmental Sciences 2012年第7期24卷 1181-1188页

作者： Weidong Guo liyang yang Xiangxiang Yu Weidong Zhai Huasheng Hong State Key Laboratory of Marine Environmental Science Xiamen UniversityXiamen 361005China College of Oceanography and Environmental Science Xiamen UniversityXiamen 361005China

Photo-production of dissolved inorganic carbon （DIC） from chromophoric dissolved organic matter （CDOM） is an important transformation process in marine carbon cycle, but little is known about this process in Chinese coastal systems. This study investigated an estuarine water sample and a coastal seawater sample from the subtropical waters in southeast of China. Water samples were exposed to natural sunlight and the absorption and fluorescence of CDOM as well as the DIC concentration were measured in the summer of 2009. The estuarine water had higher CDOM level, molecular weight and proportion of humic-like fluorescent components than the seawater that exhibited abundant tryptophan-like fluorescent component. After a 3-day irradiation, the CDOM level decreased by 45% in the estuarine water and 20% in the seawater, accompanied with a decrease in the molecular weight and aromaticity of DOM which was inferred from an increase in the absorption spectral slope parameter. The photo-degradation rates of all the five fluorescent components were also notable, in particular two humic-like components （C4 and C5） were removed by 78% and 69% in the estuarine water and by 69% and 56% in the seawater. The estuarine water had a higher photo-production rate of DIC than the seawater （4.4 vs. 2.5 μmol/（L-day））, in part due to its higher CDOM abundance. The differences in CDOM compositions between the twO types of waters might be responsible for the higher susceptibility of the estuarine water to photo-degradation and hence could also affect the photo-production process of DIC.

关键词： dissolved inorganic carbon photo-production and -degradation chromophoric dissolved organic matter estuary seawater

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Optical properties of estuarine dissolved organic matter isolated using cross-flow ultrafiltration

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Acta Oceanologica Sinica 2014年第4期33卷 22-29页

作者： YI Yueyuan ZHENG Airong GUO Weidong yang liyang CHEN Ding State Key Laboratory of Marine Environment Science Xiamen University College of Ocean and Earth Sciences Xiamen University

Dissolved organic matter （DOM） from freshwater, mid-salinity, and seawater endmember samples in the Jiulong River Estuary, China were fractionated using cross-flow ultrafiltration with a 10-kDa membrane. The colloidal organic matter （COM; 10 kDa-0.22 pm） retentate, low molecular weight （LMW） DOM （〈10 kDa） permeate, and bulk samples were analyzed using absorption spectroscopy and three-dimensional fluorescence excitation-emission-matrix spectroscopy. The UV-visible spectra of COM were very similar to those obtained for permeate and bulk samples, decreasing monotonically with increasing wavelength. Most of the chromophoric DOM （CDOM, expressed as the absorption coefficient a355） occurred in the LMW fraction, while the percentage of CDOM in the colloidal fraction was substantially higher in the freshwater endmembet （13.4% of the total） than in the seawater endmember （6.8%）. The bulk CDOM showed a conservative mixing behavior in the estuary, while there was removal of the COM fraction and a concurrent addition of the permeate fraction in the mid-salinity sample, implying that part of the colloidal CDOM was transformed into LMW CDOM. Two humic-like components （CI：〈250, 325/402 nm; and C2： 265, 360/458 nm） and one protein-like component （C3：275/334 nm） were identified using parallel factor analysis. The contributions of the C1, C2, and C3 components of the COM fraction to the bulk sample were 2.5%-8.7%, 4.8%-12.6%, and 7.4%-14.7%, respectively, revealing that fluorescent DOM occurred mainly in the LMW fraction in the Jiulong River Estuary. The C1 and C2 components in the retentate and permeate samples showed conservative mixing behavior, but the intensity ratio of C2/C1 was higher in the retentate than in the permeate fractions for all salinity samples, showing that the humic component was more enriched in the COM than the fulvic component. The intensity ratio of C3/（C 1 ＋C2） was much higher in the retentate than in the permeate fraction for mid-salinity and seawater sam

关键词： colloidal organic matter three-dimensional fluorescence spectroscopy parallel factor analysis ultrafiltration liulong River Estuary

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Carbon isotopes and lignin phenols for tracing the floods during the past 70 years in the middle reach of the Changjiang River

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Acta Oceanologica Sinica 2020年第4期39卷 33-41页

作者： Zhongqiao Li Ying Wu liyang yang Jinzhou Du Bing Deng Jing Zhang State Key Laboratory of Estuarine and Coastal Research East China Normal UniversityShanghai 210012China Key Laboratory of Marine Ecosystem Dynamics Second Institute of OceanographyMinistry of Natural ResourcesHangzhou 310012China College of Environment and Resources Fuzhou UniversityFuzhou 350108China

The Lake Tian E Zhou(TEZ,an oxbow lake)was formed during the rerouting of the Changjiang River in 1972,with strong influences from the main river channel and flood ***,a sediment core was collected from the Lake TEZ for the measurements of carbon isotopes and biomarkers,including stable carbon isotopes(δ13C),radiocarbon composition(?14C),and lignin phenols,as well as lead-210 to reconstruct recent heavy flood events over the past 70 *** the 24–26 cm interval,the sediment contained the highest OC%,TN%,and lignin phenols content,as well as significantly depleted 13C but enriched 14C,corresponding to the extreme flood event in *** addition,statistics from t-test showed that lignin phenols normalized to OC(Λ8),the concentration of 3,5-dihydroxy benzoic acid(3,5-BD),and the ratio of p-hydroxy benzophenone to total hydroxyl phenols(PHB/HP)were all significantly different between the layers containing flood deposits and the layers deposited under normal non-flood conditions(p<0.05).These results indicate that the later three parameters are highly related to flood events and can be used as compelling proxies,along with sediment chronology,for hydrological changes and storm/flood events in the river basin and coastal marine environments.

关键词： flood record carbon isotopes lignin phenols Changjiang River Lake Tian E Zhou

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Biological roles and potential clinical values of circular RNAs in gastrointestinal malignancies

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Cancer Biology & Medicine 2021年第2期18卷 437-457页

作者： Xueping Tao Yongfu Shao Jianing Yan liyang yang Qihua Ye Qingling Wang Rongdan Lu Junming Guo Department of Biochemistry and Molecular Biology and Zhejiang Key Laboratory of Pathophysiology Ningbo University School of MedicineNingbo 315211China Department of Gastroenterology the Affiliated Hospital of Medical School of Ningbo UniversityNingbo 315020China

Circular RNAs(circ RNAs),a class of endogenous RNA molecules,are produced by alternative splicing of precursor RNA and are covalently linked at the 5′and 3′*** studies have revealed that dysregulated circ RNAs are closely related to the occurrence and progression of gastrointestinal *** evidence indicates that circ RNAs,including circ PVT1,circ LARP4,circ-SFMBT2,cir-ITCH,circ RNA_100782,circ_100395,circ-DONSON,hsa_circ_0001368,circ NRIP1,circ FAT1(e2),circ CCDC66,circ SMARCA5,circ-ZNF652,and circ_0030235 play important roles in the proliferation,differentiation,invasion,and metastasis of cancer cells through a variety of mechanisms,such as acting as micro RNA sponges,interacting with RNA-binding proteins,regulating gene transcription and alternative splicing,and being translated into *** the characteristics of high abundance,high stability,extensive functions,and certain tissue-,time-and diseasespecific expressions,circ RNAs are expected to provide novel perspectives for the diagnoses and treatments of gastrointestinal malignancies.

关键词： Circular RNA gastrointestinal malignancies biological function clinical value digestive system

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An integrated slacks-based super-efficiency measure in the presence of negative data

An integrated slacks-based super-efficiency measure in the p...

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第十五届（2020）中国管理学年会

作者： liyang yang Nan Zhu School of Statistics Southwestern University of Finance and Economics Western Business School Southwestern University of Finance and Economics

In Data Envelopment Analysis（DEA） literature, a very few super-efficiency models focus on handling negative data. In this paper, we propose an integrated slacks-based super-efficiency measure（integrated super SBM） model to handle negative data. The proposed integrated super-efficiency model can evaluate the efficiency scores of inefficient decision-making units（DMUs） and super-efficiency scores of efficient DMUs simultaneously. Further, it could separate the efficient DMUs from inefficient ones as well as differentiate between efficient DMUs, and rank all DMUs in one-stage. With the advantage of time-efficient in the computational process, the practical application of this model would be high. The slacks-based measure considers both radial and non-radial slacks and reflects more inefficiencies than radial models. Moreover, the proposed measure can deal with negative data directly without any subjective transformation of the observations, which expands its real-world application, especially in the existence of negative data. Besides, the projection of each DMU is strongly Pareto efficient, and the model can never lead the inefficient DMUs to worse targets.

关键词： Data envelopment analysis Negative data Slacks-based measure Super-efficiency

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Chemotherapy with or without irinotecan in patients with advanced or recurrent gastric cancer： a meta-analysis of randomized controlled trials

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Chinese Medical Journal 2014年第5期127卷 951-956页

作者： Zeng Chao Zhou Hang Wei yang Wang liyang Xie Hua Yao Wenxiu Department of Gastroenterology Third People&#39 s Hospital of Chengdu Chengdu Sichuan 610031 China

Background Studies have shown that irinotecan can improve survival in patients with advanced or recurrent gastric cancer,but the overall benefit of irinotecan in the treatment of advanced or recurrent gastric cancer remains *** aim of this study was to evaluate the benefits and risks of irinotecan for survival in patients with advanced or recurrent gastric *** We searched PubMed,EmBase,the Cochrane Central Register of Controlled Trials,reference lists of articles,and proceedings of major conferences for relevant clinical *** included randomized controlled trials that reported on the efficacy and safety of irinotecan in patients with advanced or recurrent gastric *** were analyzed by survival rate,objective response rate （ORR）,and ***,the analysis was further stratified by factors that could affect the treatment *** Eight trials recruiting 1 546 patients with advanced or recurrent gastric cancer were included in the ***,irinotecan therapy was associated with a 6％ improvement in survival rate,but this difference was not statistically significant （odds ratio （OR） 0.94; 95％ confidence interval （95％ CI） 0.70-1.27; P=-0.69）.However,irinotecan therapy had more frequent ORR than irinotecan-free arm （OR 1.70; 95％ CI 1.34-2.17; P ＜0.001）.Furthermore,irinotecan therapy was associated with a clinically and statistically significant increase in the risk for declined hemoglobin,hyponatremia,and diarrhea,but it also protected against thrombocytopenia risk when compared with irinotecan-free *** There is no evidence to support the use of irinotecan therapy in patients with advanced or recurrent gastric cancer; however,given the significant advantage in ORR irinotecan therapy using combination regimens may be considered for further evaluation in subsets of patients who may benefit from this treatment.

关键词： irinotecan gastric cancer meta-analysis

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无线紫外光散射通信中的改进CMA-FSE盲均衡算法

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通信学报 2019年第3期40卷 102-108页

作者：赵太飞刘龙飞王晶杨黎洋西安理工大学自动化与信息工程学院陕西西安710048 西南科技大学特殊环境机器人技术四川省重点实验室四川绵阳621010

无线紫外光散射通信系统具有严重的码间干扰和信号衰减问题,针对该问题,提出了一种基于信噪比估计的改进常模分数间隔均衡器(CMA-FSE)算法。该算法将分数间隔均衡器(FSE)和常模算法(CMA)结合起来对无线紫外光信道进行盲均衡,使用接收信... 详细信息

无线紫外光散射通信系统具有严重的码间干扰和信号衰减问题,针对该问题,提出了一种基于信噪比估计的改进常模分数间隔均衡器(CMA-FSE)算法。该算法将分数间隔均衡器(FSE)和常模算法(CMA)结合起来对无线紫外光信道进行盲均衡,使用接收信号的均方值衡量输入信噪比来确定最佳迭代步长,保证均衡算法快速收敛。仿真结果表明,改进CMA-FSE算法能在各种信噪比下快速收敛,并有效抑制码间干扰,改善系统误码率性能。与现有算法相比,改进算法信道跟踪和噪声抑制能力更强。

关键词：紫外光散射通信码间干扰信道均衡信噪比估计

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紫外光在烟尘团簇粒子中的散射特性

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激光与光电子学进展 2019年第5期56卷 18-25页

作者：赵太飞冷昱欣杨黎洋张杰西安理工大学自动化与信息工程学院陕西西安710048 西南科技大学特殊环境机器人技术四川省重点实验室四川绵阳621010 北京邮电大学信息光子学与光通信国家重点实验室北京100876

采用烟尘的团簇-团簇凝聚模型和离散偶极子近似方法,分析了紫外光在不同烟尘浓度和粒子半径下的单次和多次散射信道特性,以及散射角对散射光强的影响。研究结果表明,在紫外光短距离直视通信方式下,当粒子半径相同时,随着烟尘浓度的增大... 详细信息

采用烟尘的团簇-团簇凝聚模型和离散偶极子近似方法,分析了紫外光在不同烟尘浓度和粒子半径下的单次和多次散射信道特性,以及散射角对散射光强的影响。研究结果表明,在紫外光短距离直视通信方式下,当粒子半径相同时,随着烟尘浓度的增大,路径损耗不断增大,而当烟尘浓度一定时,路径损耗随着粒径的增大而增大;在紫外光非直视通信方式下,短距离时烟尘浓度及原始半径越大,散射信道路径损耗越小,而长距离通信时烟尘浓度越高,其路径损耗越大,但不同浓度下的路径损耗的差别较小。在多次散射情况下,散射光强随着散射角的增大而减小,而当散射角相同时,烟尘浓度越高,紫外光的散射光强越大。

关键词：大气光学紫外光通信烟尘团簇粒子路径损耗散射光强

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基于无人机平台的气振式核桃采收机设计与试验

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农业机械学报 2024年第1期55卷 55-64页

作者：郭关柱杨李洋罗亚南许光明云南农业大学机电工程学院昆明650201 云南省轻纺工业设计院有限公司昆明650041

针对云南山地种植的深纹核桃树体高大造成现有机械难于采收,而人工爬树用竹竿击打采收成本高且伤亡大的问题,提出了搭载无人机的气振式核桃采收原理及方法,基于深纹核桃成熟果实的果柄连接强度的测试与分析结果,进行了核桃脱落的气振流... 详细信息

针对云南山地种植的深纹核桃树体高大造成现有机械难于采收,而人工爬树用竹竿击打采收成本高且伤亡大的问题,提出了搭载无人机的气振式核桃采收原理及方法,基于深纹核桃成熟果实的果柄连接强度的测试与分析结果,进行了核桃脱落的气振流动仿真分析,设计了搭载于六旋翼农业植保无人机上的气振式核桃采收机,分析了气振式核桃采收机在发射气振时的反冲稳定性,实施了气振式核桃采收机搭载无人机进行采收的试验验证,按效率优先和采净率优先两种采收模式,对气振式核桃采收机的采收效率和采净率做了预测分析。研究结果表明,核桃成熟度为80%、90%和100%时,使核桃果柄断裂实现落果的气振临界流速分别为77.5、69.0、58.5 m/s;气舱容积为20 L且气压为1 MPa时,气振式核桃采收机的气动喷口至核桃挂果位置的最佳距离为0.5 m,单次气振流动采收的最大有效面积的仿真值和试验值分别约为0.09 m^(2)和0.10 m^(2),最大有效采收面积随着到气动喷口距离增大而减小。

关键词：深纹核桃无人机气振流动采收机采收效率

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即食麻辣鱼肉豆干加工工艺研究

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肉类工业 2017年第8期 17-20页

作者：杨立安徽富煌三珍食品集团有限公司安徽合肥238076

以鱼肉、大豆分离蛋白、辣椒等为主要原料,以成品感官品质为指标,通过单因素及正交试验的方法对即食型麻辣鱼肉豆干的加工工艺进行研究。结果表明,该产品最佳斩拌料配方为:鱼肉30%、大豆分离蛋白22%、变性淀粉15%、魔芋胶5%、冰水18%、... 详细信息

以鱼肉、大豆分离蛋白、辣椒等为主要原料,以成品感官品质为指标,通过单因素及正交试验的方法对即食型麻辣鱼肉豆干的加工工艺进行研究。结果表明,该产品最佳斩拌料配方为:鱼肉30%、大豆分离蛋白22%、变性淀粉15%、魔芋胶5%、冰水18%、食盐1.2%、生姜0.5%、大蒜0.5%、白酒1.0%。最佳熬煮调味料配方为:菜籽油5.5%、食盐2.0%、白砂糖1.5%、味精0.4%、I+G 0.02%、生姜0.8%、酱油1.4%、花椒2.0%、干辣椒3.0%。按此配方生产的即食型麻辣鱼肉豆干具有独特的风味与口感。

关键词：即食麻辣鱼肉豆干加工工艺

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