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Effect of Dissolved Oxygen on Swimming Ability andPhysiological Response to Swimming Fatigue ofWhiteleg Shrimp （Litopenaeus vannamet3

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Journal of Ocean University of China 2014年第1期13卷 132-140页

作者： Yan Duan (1) (2) Xiumei Zhang (1) Xuxu Liu (1) Dhanrajsingh N. Thakur (1) 1. The Key Laboratory of Mariculture of Chinese Ministry of Education Ocean University of China Qingdao 266003 P. R. China 2. Liaoning Open Laboratory of Applied Marine Biotechnology Liaoning Ocean and Fisheries Science Research Institute Dalian 116023 P. R. China

The swimming endurance of whiteleg shrimp （Litopenaeus vannamei, 87.66 mm±0.25 mm, 7.73 g±0.06 g） was exam-ined at various concentrations of dissolved oxygen （DO, 1.9, 3.8, 6.8 and 13.6mgL-1） in a swimming channel against one of the fiveflow velocities （vb v2, v3, v4 and vs）. Metabolite contents in the plasma, hepatopancreas and pleopods muscle of the shrimp werequantified before and after swimming fatigue. The results revealed that the swimming speed and DO concentration were significantfactors that affected the swimming endurance ofL. vannamei. The relationship between swimming endurance and swimming speedat various DO concentrations can be described by the power model （vtb= a）. The relationship between DO concentration （mgL-l） e 9000and the swimming ability index （SAI）, defined as SAI= ∫9000vdt （cm）, can be described as SAI=27.947DO0.137 （R2=0.9312）. Thelevel of DO concentration directly affected the physiology of shrimp, and exposure to low concentrations of DO led to the increasesin lactate and energetic substrate content in the shrimp. In responding to the low DO concentration at 1.9 mg L-1 and the swimmingstress, L. vannamei exhibited a mix of aerobic and anaerobic metabolism to satisfy the energetic demand, mainly characterized by theutilization of total protein and glycogen and the production of lactate and glucose. Fatigue from swimming led to severe loss ofplasma triglyceride at Vl, v2, and v3 with 1.9mgL-1DO, and at V1 with 3.8, 6.8 and 13.6mgL-1 DO, wher.as the plasma glucose con-tent increased significantly at v3, v4 and v5 with 3.8 and 6.8mgL-1 DO, and at v5 with 13.6mgL-1 DO. The plasma total protein andhepatopancreas glycogen were highly depleted in shrimp by swimming fatigue at various DO concentrations, wher.as the plasmalactate accumulated at high levels after swimming fatigue at different velocities. These results were of particular value to under-standing the locomotory ability of whiteleg shrimp and its physiological changes, further.contribut

关键词： dissolved oxygen glucose glycogen lactate total protein swimming endurance SAI

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Property transformation under specification change

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Frontiers of Computer Science 2011年第1期5卷 1-13页

作者： Zheng Fu (1) zhengfu@itee.uq.edu.au Graeme Smith (1) 1. School of Information Technology and Electrical Engineering The University of Queensland QLD 4072 Australia

Formal specifications of software systems need to evolve in many ways during system development. Not only are changes required to refine the specification toward an implementation, they are also required in response to changes in requirements, or to incorporate different aspects of the system, e.g., fault tolerance or timing, initially ignored in order to simplify reasoning. This paper presents an approach for evolving Z specifications by the step-wise application of a number of simple rules. These rules not only document the evolution of the specification, but also make precise how properties of the system evolve with the specification. Hence, reasoning about these properties performed on the original specification need not be repeated on the new specification.

关键词： formal methods Z refinement temporallogic system property

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A Multimodel Transfer-Learning-Based Car Price Prediction Model with an Automatic Fuzzy Logic Parameter Optimizer

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Computer Systems Science & Engineering 2023年第8期46卷 1577-1596页

作者： Ping-Huan Kuo Sing-Yan Chen her.Terng Yau Department of Mechanical Engineering National Chung Cheng UniversityChiayi62102TaiwanChina Advanced Institute of Manufacturing with High-Tech Innovations(AIM-HI) National Chung Cheng UniversityChiayi62102TaiwanChina

Cars are regarded as an indispensable means of transportation in *** studies have indicated that the automotive industry has witnessed remarkable advances and that the market of used cars has rapidly *** this study,a price prediction system for used BMW cars was *** parameters of used cars,including their model,registration year,and transmission style,were *** data obtained were then divided into three *** first subset was used to compare the results of each *** predicted values produced by the two algorithms with the most satisfactory results were used as the input of a fully connected neural *** second subset was used with an optimization algorithm to modify the number of hidden layers in a fully connected neural network and modify the low,medium,and high parameters of the membership function(MF)to achieve model ***,the third subset was used for the validation set during the prediction *** three subsets were divided using k-fold cross-validation to avoid overfitting and selection *** conclusion,in this study,a model combining two optimal algorithms(i.e.,random forest and k-nearest neighbors)with several optimization algorithms(i.e.,gray wolf optimizer,multilayer perceptron,and MF)was successfully *** prediction results obtained indicated a mean square error of 0.0978,a root-mean-square error of 0.3128,a mean absolute error of 0.1903,and a coefficient of determination of 0.9249.

关键词： Used car price prediction transfer learning fuzzy logic machine learning optimization algorithm

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RANGE SURVEY OF DEPOSITION IN THE LOWER YELLOW RIVER

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International Journal of Sediment Research 2002年第2期17卷 91-101页

作者： LONG Yuqian1, LIANG Guoting1, ZHANG Yuanfeng1, SHEN Guanqing1, ZHANG Liuzhu1 and CHENG Longyuan1 Yellow River Conservancy Commission Zhengzhou 450003 Henan P.R.China

A range survey database is established and used to study the deposition or erosion processes in the Lower Yellow River (LYR). The huge amount of data obtained through range surveys over nearly 50 years is managed by software (RGTOOLS) developed for this study. RGTOOLS is also used to evaluate the amount and distribution of deposition or erosion in LYR. Volumetric method is used for computation of the amount of deposition. Spatial and temporal variations of the deposition are studied and illustrated with drawings. It is found that a total of 6.44 billion m3 of sediment were deposited in the lower Yellow River over approximately 50 years. The pattern of deposition varies in response to the variation of oncoming flow, which is influenced by natural climatic variations and also by reservoir operation.

关键词： Lower Yellow River Range survey database Erosion and deposition Volumetric method

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Distribution of dissolved organic carbon in and near the Prydz Bay, Antarctica

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Acta Oceanologica Sinica 2003年第4期22卷 547-556页

作者： Qiu Yusheng1, Chen Min1, Huang Yipu1, Liu Guangshan1 1. Department of Oceanography, Xiamen University, Xiamen 361005, China. Xiamen Univ Dept Oceanog Xiamen 361005 Peoples R China

During the 16th Chinese National Antarctic Research Expedition (CHINARE) (from November 1999 to April 2000) seawater samples were collected for (DOC) determination in the Prydz Bay and its nearby sea areas. DOC concentrations were determined-by high temperature catalytic oxidation (HTCO) method. The results shows that DOC concentrations, in the upper water column (0 similar to 100 in) range from 14.3 to 181.1 mumol/dm(3), with averaging 52.5 mumol/dm(3) (n = 55). These values are slightly higher.than those reported for the Ross Sea, the Pacific Ocean and other.. Profiles of DOC concentration in the study areas show a decreasing concentration with increasing depth in the upper 100 m, which is related to biological activities in the water column. DOC concentrations below 100 in are relatively constant with a mean of 40.4 gammamol/dm(3). These DOC are unactive for physical and biological activities and are called refractory DOC. Concentration of the refractory DOC in the study area is consistent with the previous reported values for the Souther. Ocean, which is about 41 mumol/dm(3). Based on the difference between the measured DOC concentration and the refractory concentration, the excess DOC concentration in the upper column can be calculated at every station. The excess DOC shows a spatial variability with a higher.excess in the north of 64degreesS and little excess in the south of 64degreesS. In conclusion, DOC concentrations in the Prydz Bay and its nearby sea areas,are, consistent with the previous reported values in the Souther. Ocean, which show a low DOC concentration with respect to the other.oceans. Distribution of surface DOC concentrations in the study areas shows an increase from the southwestern to the northeastern, which is ascribed to the norther. spread of continental shelf water from the Prydz Bay in summer. Contents of DOC and their distribution in the Prydz Bay and its nearby sea areas are mainly controlled by physical and biological processes.

关键词： The Prydz Bay Antarctica dissolved organic carbon

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Identifying different community members in complex networks based on topology potential

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Frontiers of Computer Science 2011年第1期5卷 87-99页

作者： Yanni Han (1) hyn@*** Deyi Li (12) Teng Wang (1) State Key Laboratory of Software Development Environment Beijing University of Aeronautics and Astronautics Beijing 100191 China Institute of Electronic System Engineering Beijing 100039 China

Ther. has been considerable interest in designing algorithms for detecting community structure in real-world complex networks. A majority of these algorithms assume that communities are disjoint, placing each vertex in only one cluster. However, in nature, it is a matter of common experience that communities often overlap and members often play multiple roles in a network topology. To further.investigate these properties of overlapping communities and heterogeneity within the network topology, a new method is proposed to divide networks into separate communities by spreading outward from each local important element and extracting its neighbors within the same group in each spreading operation. When compared with the state of the art, our new algorithm can not only classify different types of nodes at a more fine-grained scale successfully but also detect community structure more effectively. We also evaluate our algorithm using the standard data sets. Our results show that it performed well not only in the efficiency of algorithm, but also with a higher.accuracy of partition results.

关键词： complex network community structure,topology potential overlapping nodes

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Behavior pattern extraction by trajectory analysis

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Frontiers of Computer Science 2011年第1期5卷 37-44页

作者： Jia Wen (12) wjyanyuan@*** Chao Li (1) Zhang Xiong (1) Beihang Univ Sch Engn & Comp Sci Beijing 100191 Peoples R China Yanshan Univ Dept Comp Coll Informat Sci & Engn Qinhuangdao 066004 Peoples R China

Trajectory clustering and behavior pattern extraction are the foundations of research into activity perception of objects in motion. In this paper, a new framework is proposed to extract behavior patterns through trajectory analysis. Firstly, we introduce directional trimmed mean distance （DTMD）, a novel method used to measure similarity between trajectories. DTMD has the attributes of anti-noise, self-adaptation and the capability to determine the direction for each trajectory. Secondly, we use a hierarchical clustering algorithm to cluster trajectories. We design a length-weighted linkage rule to enhance the accuracy of trajectory clustering and reduce problems associated with incomplete trajectories. Thirdly, the motion model parameters are estimated for each trajectory＇s classification, and behavior patterns for trajectories are extracted. Finally, the difference between normal and abnormal behaviors can be distinguished.

关键词： trajectory clustering directional trimmedmean distance (DTMD) behavior pattern extraction

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First Total Synthesis of (±)-3-(5-Hydroxy-4,7,8-trimethyl-3E,8-nonadiene)-△^(2)-butenolide

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Chinese Chemical Letters 2004年第2期15卷 141-142页

作者： Tao ZHANG1] Yi LI1] Li Zeng PENG1] Hua Wei LIU1] Tian Sheng MEI1] Yu Lin LI1] National Laboratory of Applied Organic Chemistry and Institute of Organic Chemistry Lanzhou University Lanzhou 730000

An efficient total synthesis of ()-3-(5-hydroxy-4,7,8trimethyl3E,8nonadiene)2 butenolide 1, an unusual homosesquiterpene, starting from geraniol 2 through ten steps are described.

关键词： Total synthesis 2–butenolide homosesquiterpene.

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新一轮家电“以旧换新”行动方案影响

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日用电器 2024年第3期 1-2页

作者： 1.华创证券 2.光大证券 3.中信期货华创证券光大证券中信期货

国务院印发《推动大规模设备更新和消费品以旧换新行动方案》（以下简称《行动方案》），明确了5方面20项重点任务和实施设备更新、消费品以旧换新、回收循环利用、标准提升四大行动，提出积极开展家电等消费品以旧换新。《行动方案》...

国务院印发《推动大规模设备更新和消费品以旧换新行动方案》（以下简称《行动方案》），明确了5方面20项重点任务和实施设备更新、消费品以旧换新、回收循环利用、标准提升四大行动，提出积极开展家电等消费品以旧换新。《行动方案》家电直接相关内容1.到2027年废旧家电回收量较2023年增长30%,

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A Preliminary Study of the Noninvasive Remote Control System for Rat Bio-Robot

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Journal of Bionic Engineering 2010年第4期7卷 375-381页

作者： Xitian Pi~(1,2),Shuangshuang Li~1,Lin Xu~1,Hongying Liu~1,Shenshan Zhou~1,Kang Wei~1,Zhenyu Wang~1,Ziru Jia,Xiaolin Zheng~(1,2),Zhiyu Wen~2 1.Bioengineering College,Chongqing University,Chongqing 400030,P.R.China 2.Key Laboratories for National Defense Science and Technology of Innovative Micro-Nano Devices and System Technology,Chongqing University,Chongqing 400030,P.R.China [a] Bioengineering College Chongqing University Chongqing 400030 P. R. China [b] Key Laboratories for National Defense Science Technology of Innovative Micro-Nano Devices System Technology Chongqing University Chongqing 400030 P. R. China

A system is described her. that can noninvasively control the navigation of freely behaving rat via ultrasonic,epidermaland LED photic stimulators on the *** system receives commands from a remote host computer to deliver specifiedelectrical stimulations to the hearing,pain and visual senses of the rat *** results demonstrate that the three stimuliwork in groups for the rat *** can control the rat to proceed and make right and left turns with great *** verified that the rat was able to reach a setting destination in the way of cable with the help of a person through theappropriate coordination of the three *** telemetry video camera mounted on the head of the rat also achieveddistant image acquisition and helped to adjust its navigation path over a distance of 300 *** a word,the non-invasive motioncontrol navigation system is a good,stable and reliable bio-robot.

关键词： rat navigation bio-robot ultrasonic stimulator epidermal stimulator LED photic stimulator

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