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Seasonal dynamics and grazing rate of zooplankton in Yueqing Bay,China

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Frontiers in Biology 2006年第4期1卷 434-442页

作者： LIU Zhensheng WANG Chunsheng ZHANG Zhinan cai yuming ZHANG Dongsheng College of Marine Life Science Ocean University of ChinaQingdao 266003China Second Institute of Oceanography State Oceanic AdministrationHangzhou 310012China Key Lab of Submarine Geosciences State Oceanic AdministrationHangzhou 310012China

The species composition,biomass,abundance,and species diversity of zooplankton were determined for samples collected from August 2002 to May 2003 from 14 stations in Yueqing Bay,*** growth rate and microzooplankton grazing rate were obtained by using the dilution method developed by Landry and *** spatial and temporal variations of zooplankton and its relationship with environmental factors were also *** results showed that the zooplankton in the Yueqing Bay could be divided into four ecotypes,namely coastal low saline species,estuary brackish water species,offshore warm water species,and eurytopic species.A total of 75 species of zooplankton belonging to 56 genera and 17 groups of pelagic larva were identified in the Yueqing *** coastal low saline species was the dominant ecotype in the study area,and the dominant species were Labidocera euchaeta,Acartia pacifica,Acrocalanus gibber,Pseudeuphausia sinica,and Sagitta bedoti among *** was considerable seasonal variation in zooplankton biomass and abundance in the surveyed *** peak biomass appeared in August,descending in November and in May,and the lowest biomass appeared in ***,the highest abundance of zooplankton was observed in August,with the abundance descending in the following months:May,November,and *** were similar horizontal distribution patterns for the biomass and the abundance of *** both increased from the upper to the lower bay in February and May,but decreased from the upper to the lower bay in *** and abundance were evenly distributed in the Yueqing Bay in ***,there was marked seasonal variation in the species diversity of zooplankton,which conformed to the abundance of *** of the dilution experiments indicated that there was grazing pressure of microzooplankton on phytoplankton in the Yueqing Bay throughout the year though the rate of microzooplankton grazing on phytopla

关键词： zooplankton biomass abundance grazing rate Yueqing Bay China

Standing Crop and Primary Production of Benthic Microalgae on the Tidal Flats in Yueqing Bay

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Journal of Ocean University of China 2011年第2期10卷 157-164页

作者： HAO Qiang cai yuming NING Xiuren LIU Chenggang PENG Xin TANG Xuexi College of Marine Life Sciences Ocean University of China Qingdao 266003 P. R. China Second Institute of Oceanography State Oceanic Administration （ SOA Hangzhou 310012 China） SOA Key Lab of Marine Ecosystem and B iogeochemistry Hangzhou 310012 China Zhejiang Mariculture Research Institute Wenzhou 325000 China

The standing stock and primary production of benthic microalgae on tidal flats were measured seasonally at 3 transects (Puqing, Dahengchuang and Puqi) in Yueqing Bay during 2002 2003. The results showed that the integral chlorophyll a (Chl a) concentration in tidal flat mud exhibited a seasonal variation with the order of magnitude: winter (14.0 4.2 mg m-2) > spring (13.0 6.3 mg m-2) > autumn (7.7 5.9 mg m-2) > summer (4.6 3.2 mg m-2). The primary production showed an order of magnitude: spring (270.5 224.9 mgC m-2 d-1)>winter (238.7 225.5 mgC m-2 d-1)>autumn (214.1 56.2 mgC m-2 d-1)>summer (71.6 44.6 mgC m-2 d-1). Both chlorophyll a and primary production showed maximum values in the surface layer of sediment, and decreased rapidly with increasing depth due to sun light limitation. The results of variance analysis indicated that seasonal variation and tidal flat condition affected Chl a greatly, but had no significant effect on primary production. The annual primary production of benthic microalgae on tidal flats in Yueqing Bay was estimated at 16143 tons carbon, which is sufficient to support 1.02×105 tons shellfish production. The environmental factors affecting chlorophyll and primary production on the tidal flats in Yueqing Bay were discussed. By comparing with other bays on China's coast, it was observed that Yueqing Bay is a region with high benthic microalgae standing crop and primary production, which may be related to the type of its sediment.

关键词： chlorophyll a primary production benthic microalgae tidal flat Yueqing Bay

Analysis of Serum Levels of IgA Antibodies to Epstein Barr Virus Capsid Antigens in the Spouses and the Children of Patients with Nasopharyngeal Carcinoma

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Clinical oncology and cancer researeh 2009年第4期6卷 267-270页

作者： Jiru Cheng Yonglin cai yuming Zheng Jun Li Yongkun Mo Wuzhou Red Cross Hospital Wuzhou CancerResearch Institute Wuzhou 543002 GuangxiZhuang Autonomous Region China.

OBJECTIVE To analyze the serum levels of IgA antibodies to Epstein Barr virus capsid antigens （EBV/IgA/VCA） in patients with nasopharyngeal carcinoma （NPC） and in their spouses and children in order to further evaluate the risk of developing the disease in family members of NPC patients. METHODS Four categories of sera were used to detect EBV/ IgA/VCA using the immunoenzyme method. In our study 317 biopsy-confirmed NPC patients, 317 spouses and 317 children of the NPC patients, as well as 413 healthy subjects as the controls that came from the same area were enrolled. RESULTS The positive rate of EBV/lgA/VCA was 97.2%, 14.2%, 19.9% and 3.1% in the NPC patients, the spouse and child groups, and in the control group, respectively. The positive rate was significantly higher in the NPC group than in the other 3 groups, and it was also significantly higher in the spouse and in the child groups than in the control group （P 〈 0.001）. The results of the relative to identified distribution unit （Ridit） analysis showed that the average Ridit values were 0.860, 0.404, 0.424 and 0.356 respectively in the NPC patients, in the spouse and child groups, and in the control group. The antibody titer of IgA/VCA was significantly higher in the NPC group than in the other 3 groups, and it was also significantly higher in both the spouse and child groups than in the control group （P 〈 0.001）. The OR values of positive EBV/IgA/VCA antibody were 5.09 and 7.63, respectively in the spouse and child groups. No significant differences were found in the positive rates or in the titers of IgA/VCA antibody between the groups of spouses and children （P 〉 0.05）. CONCLUSION Positive detection of EBV/IgA/VCA antibody occurs in familial aggregation, as there is ample opportunity for EBV reactivation in the spouses and in the children of NPC patients. These individuals with a high risk of developing the NPC should be closely followed in order to detect the disease at an early stage.

关键词： nasopharyngeal carcinoma Epstein-Barr virus antibody family member.

Standing stock of phytoplankton and primary productivity in Penaeus orientalis larval multiplication releasing area of the Xiangshan Bay

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Acta Oceanologica Sinica 2000年第1期19卷 109-118页

作者： Liu Zilin cai yuming Shi Junxiang Ning Xiuren (1. Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China) Second Institute of Oceanography State Oceanic Administration Hangzhou 310012 China

The standing stock of phytoplankton (phy. ) and primary productivity (pp) in the Xiangshan Bay were observed in 1992. The results showed higher biological parameters in the bay. The average chlorophyll a (chl a) concentration was (3. 50 5. 93 ) mg/m3 and the primary productivity (444. 5 871. 0) mg/(m2 d). The distribution of chl a and productivity showed distinct spatial and temporal patterns in the bay. The continent influence was Obvious at the top of the bay, lower seawater exchange and higher stability led to higher standing stock of phytoplankton and productivity. At the bay mouth, seawater exchanged continuously with adjacent waters by rapid currents, resulting in fast and unstable exchange and lower standing stock of phytoplankton and primary productivity. The seasonal characters of those parameters were pronounced, in the sequence of spring, summer, autumn and winter. The results of size--fractionated showed that the average contribution of the nano--and picoplankton (< 20pm) to total chl a and productivity were 75 % and 87%, respectively, indicating their importance in phytoplankton community biomass and productivity of the Xiangshan Bay.

关键词： Standing stock phytoplankton chl a primary productivity size-fractionated Xiangshan

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热喷涂工艺在电器产品表面防腐中的应用

高压电器 2000年第3期36卷 43-45页

作者：蔡玉明南京雷电(集团)有限责任公司南京210038

介绍了丝材火焰喷涂和丝材电弧喷涂工艺的基本原理和使用的主要设备，以及热喷锌的工艺要求及其技术优势。

关键词：电器产品表面防腐热喷涂工艺高压电器

Experimental and theoretical analysis of loading characteristics of electret filter media for charged particles

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Particuology 2024年第10期93卷 87-98页

作者： Yiqi cai Rongrong cai Lizhi Zhang Key Laboratory of Enhanced Heat Transfer and Energy Conservation of Education Ministry School of Chemistry and Chemical EngineeringSouth China University of TechnologyGuangzhou510640China State Key Laboratory of Subtropical Building Science South China University of TechnologyGuangzhou510640China

The degradation of filtration performance in electret filter media during usage poses a significant challenge. Pre-charging of aerosols has been identified as an effective method to mitigate this issue. However, the effects of particle charging characteristics on the loading characteristics of electret filters still need a comprehensive understanding. In this study, a needle-cylinder corona charger was employed to pre-charge aerosols, and the particle charge state was determined by multiphysics simulation. The effects of particle charge polarity and charge quantity on the loading performance of the electret filter were quantitatively investigated. The results showed that the particle charge polarity had a negligible impact on the loading performance under the condition of the equivalent particle charge quantity. In addition, the charged particles effectively improved the efficiency degradation during the loading process of electret media, with higher charge quantities resulting in more pronounced improvements. The electrostatic attenuation factor showed a negative exponential correlation with the particle charge quantity. This was attributed to the uneven particle deposition on fiber surface due to the attraction of charged particles by the opposite charges on the electret fibers, which alleviated the effect of electrostatic shielding.

关键词： Electret filter Charged particles Loadingcharacteristic Corona charging Electrostatic screening

Experimental study on the sandstone abrasiveness via mineral composition and microstructure analysis

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Petroleum 2024年第3期10卷 440-445页

作者： Xiangchao Shi Yang Tang Shuai Chen Leiyu Gao yuming Wang State Key Lab of Oil and Gas Reservoir Geology and Exploitation Southwest Petroleum UniversityChengdu610500China

Rock abrasiveness is an important factor affecting the tool's lifetime and efficiency in breaking a *** rock abrasiveness helps in the design,optimization,and mean-life prediction of *** diffraction,cast thin section analysis,and CERCHAR abrasiveness tests were performed on 18 different sandstones to characterize rock abrasiveness and explore new methods for *** relationship between the mineral composition and microstructure of sandstone and abrasiveness was *** results show that different structural maturities have varying effects on *** addition,the higher the structural maturity,the more the ***,in sandstones of the same structural maturity,the abrasiveness increases with equivalent quartz content(EQC).The texture coefficient(TC)and CERCHAR abrasiveness index(cai)of sandstones with the same structural maturity showed a good linear ***,the correlation coefficients considering the combined parameters are above ***,obtaining the microstructure and mineral composition of sandstone can effectively characterize rock *** also provides a new method for predicting the abrasiveness of the rock in the well.

关键词： Abrasiveness Microstructure Mineral compositions Structural maturity Equivalent quartz content Sandstone

Shor's algorithm does not factor large integers in the presence of noise

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Science China(Information Sciences) 2024年第7期67卷 305-320页

作者： Jin-Yi cai College of Letters and Science University of Wisconsin

We consider Shor's quantum factoring algorithm in the setting of noisy quantum gates. Under a generic model of random noise for(controlled) rotation gates, we prove that the algorithm does not factor integers of the form pq when the noise exceeds a vanishingly small level in terms of n—the number of bits of the integer to be factored, where p and q are from a well-defined set of primes of positive density. We further prove that with probability 1-o(1) over random prime pairs(p, q), Shor's factoring algorithm does not factor numbers of the form pq, with the same level of random noise present.

关键词： random noise Shor’s algorithm rotation gates quantum computing prime factorization

Whittle’s Index Based Sensor Scheduling for Multiprocess Systems Under DoS Attacks

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Journal of Systems Science & Complexity 2024年第1期37卷 329-350页

作者： cai Zai DING Kemi Shenzhen Key Laboratory of Control Theory and Intelligent Systems Southern University of Science and TechnologyShenzhen 518055China.

In this paper,the authors consider how to design defensive countermeasures against DoS attacks for remote state estimation of multiprocess *** each system,a sensor will measure its state and transmits the data packets through an unreliable channel which is vulnerable to be jammed by an *** limited communication bandwidth,only a subset of sensors are allowed for data transmission,and how to select the optimal one to maximize the accuracy of remote state estimation is the focus of the proposed *** authors first formulate this problem as a Markov decision process and investigate the existence of optimal ***,the authors demonstrate the piecewise monotonicity structure of optimal *** the difficulty of obtaining an optimal policy of large-scale problems,the authors develop a suboptimal heuristic policy based on the aforementioned policy structure and Whittle’s ***,a closed form of the indices is derived in order to reduce implementation complexity of proposed scheduling policy and numerical examples are provided to illustrate the proposed developed results.

关键词： DoS attacks Kalman filter remote state estimation Whittle’s index.