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Research on Functional Orientation and Industrial Distribution of Cruise Town in Baoshan District, Shanghai
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作者 QIU Ling GAO Changchun 《International English Education Research》 2017年第5期44-47,共4页
Currently, the cruise market in North America is almost saturated and that in Europe is restricted by the scale. However, the cruise market prospect in East Asia is broad due to the deep cultural heritage, abundant to... Currently, the cruise market in North America is almost saturated and that in Europe is restricted by the scale. However, the cruise market prospect in East Asia is broad due to the deep cultural heritage, abundant tourism resources and large population base, resulting in the shift of the global cruise industry eastward to Asia. The position of Asia in the global cruise economy has become prominent increasingly. As a part of Shanghai, one of the most economically powerful coastal cities in China, Baoshan has national leading land, sea and air transportation networks, huge passenger flow and natural deep water terminals. Therefore, Shanghai steps in front in the development of cruise economy, shouldering the responsibility of a leader in the development of the national cruise industry. It will accelerate the growth of Shanghai's cruise industry to plan and construct the "cruise town" in Baoshan. In this paper, the author aims to further analyze the current construction orientation and development goal of the cruise town by studying the industrial base and analyzing the environment for the cruise town construction in Baoshan, explore the industrial distribution for the construction and development of the cruise town from the perspectives of tourism industry, leisure industry, finance and other service industries, and information industry, conduct in-depth analysis on the ideas about industrial distribution, and determine the system guarantee for industrial development so as to promote the healthy and orderly development of the cruise industry in China. 展开更多
关键词 SHANGHAI cruise town functional orientation industrial distribution
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Operations Improvement Function and Organisational Adaptability of Petroleum Tank Farms in South-South, Nigeria
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作者 Karibo B. Bagshaw Thomas C. Okoisama 《American Journal of Operations Research》 2023年第3期53-70,共18页
The study examined the nexus between operations improvement function (dimensioned by contingency planning, benchmarking and continuous improvement processes) and organisational adaptability of Petroleum tank farms in ... The study examined the nexus between operations improvement function (dimensioned by contingency planning, benchmarking and continuous improvement processes) and organisational adaptability of Petroleum tank farms in South-South, Nigeria. The contingency theory and the theory of routine dynamics underpinned the study, and positivism was the underlying philosophy. The study adopted the cross-sectional survey through the use of questionnaire. 820 middle and top-level managers constituted the elements of the population, and the Krejcie & Morgan’s formula was used to determine the sample size of 262 respondents. Structural Equation Modeling was deployed to test the hypotheses at a 0.05 significance level. The results showed that contingency planning;benchmarking and continuous improvement processes all have a significant positive relationship with organisational adaptability of Petroleum tank farms in South-South, Nigeria. The study concludes that Petroleum tank farms’ operations should focus on the adoption of contingency planning, benchmarking and continuous improvement processes to enhance organisational adaptability. Therefore, it is recommended that the management of Petroleum tank farms should put in place mechanisms to advance continuous improvement processes by allocating the necessary amount of resources, such as energy, time and money, in order to promote the continuous development of the continuous improvement systems. Furthermore, managers of Petroleum tank farms should make better the adoption of contingency planning, ensuring that there is as much necessary training and information for employees on how to act during a crises situation, in order to evaluate safety and prepare in advance for recovery from disasters. 展开更多
关键词 ADAPTABILITY BENCHMARKING Contingency Planning Continuous Improvement Processes operations Improvement Function and Petroleum Tank Farms
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Evolution of Air Traffic Management Concept of Operations and Its Impact on the System Architecture 被引量:3
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作者 Washington Yotto Ochieng Milena Studic Arnab Majumdar 《Transactions of Nanjing University of Aeronautics and Astronautics》 EI CSCD 2016年第4期403-413,共11页
The air traffic management system(ATM)has the task of ensuring safe,orderly and expeditious flow of air traffic.The ATM system architecture is very much dependent on the concept of operations(ConOps).Over the years th... The air traffic management system(ATM)has the task of ensuring safe,orderly and expeditious flow of air traffic.The ATM system architecture is very much dependent on the concept of operations(ConOps).Over the years the evolution in ConOps has resulted in changes in the ATM′s physical architecture,improving its physical infrastructure,increasing the levels of automation and making operational changes to improve air traffic flow,to cope with increasing demand for air travel.However,what is less clear is the impact of such changes in ConOps on the ATM′s functional architecture.This is vital for ensuring optimality in the implementation of the physical architecture components to support the ATM functions.This paper reviews the changes in the ConOps over the years,proposes a temporally invariant ATM functional model,and discusses some of the main key technologies expected to make significant improvements to the ATM system. 展开更多
关键词 air traffic management concept of operations air traffic management(ATM)functions
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Effect of L-carnitine on Cardiomyocyte Apoptosis and Cardiac Function in Patients Undergoing Heart Valve Replacement Operation 被引量:1
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作者 向道康 孙宗全 +3 位作者 夏家红 董念国 杜心灵 陈新忠 《Journal of Huazhong University of Science and Technology(Medical Sciences)》 SCIE CAS 2005年第5期501-504,共4页
Summary: The effects of L-carnitine, as an ingredient of cardioplegia solution, on cardiac function and cardiomyocyte apoptosis in patients undergoing heart valve replacement operation were investigated. Twenty-three... Summary: The effects of L-carnitine, as an ingredient of cardioplegia solution, on cardiac function and cardiomyocyte apoptosis in patients undergoing heart valve replacement operation were investigated. Twenty-three cases undergoing heart valve replacement with cardiopulmonary bypass (CPB) were randomly allocated into two groups: L-carnitine group (n=12, 12 g/L L-carnitine was put in the ST. Thomas cardioplegia) and control group (n=11, identical to the L-carnitine group except that normal saline was administered instead of L-carnitine). Serum cardial troponin I (cTnI) levels, the left ventricular ejection fraction (LVEF), and cardiac index (CI) were measured perioperatively. A bit of myocardial tissue obtained from right atria was taken before CPB and by the end of intracardiac procedure to undergo electron microscopy examination and estimate apoptosis by terminal deoxynucleotidyl transferase-mediated dUTP nick end-labeling (TUNEL). From the end of CPB to 3 days after operation, the serum levels of cTnI in the L-carnitine group was significantly lower than that in the control group (P〈0.05). Heart color ultrasonogram showed that the CI index and LVEF at 7th day postoperatively in the L-carnitine group were significantly higher than in the control group (P〈0.05). Compared to the control group, L-carnitine significantly alleviated the morphologic changes of cardiac muscle cells (electron microscopy examination) and decreased the amounts of apoptotic cardiac muscle cells (TUNEL). Furthermore, the dosage of vasoactive drugs used after operation was significantly less in the L-carnitine group (P〈0.01). It was concluded that L-carnitine cardioplegia solution could improve cardiac function in patients undergoing heart valve replacement operation and alleviate CPB-mediated apoptosis of cardiac muscle cells. 展开更多
关键词 heart valve replacement operation cardioplegia solution cardiac function APOPTOSIS L-CARNITINE
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An Ecologically Oriented Operation Strategy for a Multi-Reservoir System: A Case Study of the Middle and Lower Han River Basin, China 被引量:6
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作者 Hao Wang Xiaohui Lei +4 位作者 Denghua Yan Xu Wang Shuyue Wu Zhengjie Yin Wenhua Wan 《Engineering》 2018年第5期627-634,共8页
Constructing and operating a multi-reservoir system changes the natural flow regime of rivers, and thus imposes adverse impacts on riverine ecosystems. To balance human needs with ecosystem needs, this study proposes ... Constructing and operating a multi-reservoir system changes the natural flow regime of rivers, and thus imposes adverse impacts on riverine ecosystems. To balance human needs with ecosystem needs, this study proposes an ecologically oriented operation strategy for a multi-reservoir system that integrates environmental flow requirements into the joint operation of a multi-reservoir system in order to main- tain different ecological functions throughout the river. This strategy is a combination of a regular opti-mal operation scheme and a series of real-time ecological operation schemes. During time periods when the incompatibilities between human water needs and ecosystem needs for environmental flows are rel- atively small, the regular optimal operation scheme is implemented in order to maximize multiple human water-use benefits under the constraints of a minimum water-release policy. During time periods when reservoir-induced hydrological alteration imposes significant negative impacts on the river's key ecological functions, real-time ecological operation schemes are implemented in order to modify the out- flow from reservoirs to meet the environmental flow requirements of these functions. The practical use of this strategy is demonstrated for the simulation operation of a large-scale multi-reservoir system which located in the middle and lower Han River Basin in China. The results indicate that the real-time ecological operation schemes ensure the environmental flow requirements of the river's key ecological functions, and that adverse impacts on human water-use benefits can be compensated for by the regular optimal operation scheme. The ecologically oriented operation strategy for a multi-reservoir system that is proposed in this study enriches the theoretical application of the multi-reservoir system joint operation which considers environmental flow requirements. 展开更多
关键词 Multi-reservoir system Ecologically oriented operation Environmental flow requirements Han River Basin
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A VERSATILE CURRENT-MODE BIQUAD USING OPERATIONAL AMPLIFIERS
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作者 Yuan Shiwen Lu Huibin Shi Weidong Yutaka Fukui(Yanshan University, Qinhuangdao 066004) (Tottori University, Koyama, Tottori, 680 Japan) 《Journal of Electronics(China)》 1999年第1期73-80,共8页
A versatile current-mode biquadratic filter using three operational amplifiers and nine passive elements is proposed. By suitably choosing the output branch, lowpass, bandpass, highpass, bandstop and allpass transfer ... A versatile current-mode biquadratic filter using three operational amplifiers and nine passive elements is proposed. By suitably choosing the output branch, lowpass, bandpass, highpass, bandstop and allpass transfer functions are realized simultaneously without changing the circuit configuration and elements. Two circuits, one is for low frequency application and the other for high frequency, are proposed. The center frequency, quality factor and gain constants of the circuit can be tuned independently. Simulated results show that the circuits work successfully. 展开更多
关键词 CURRENT-MODE CIRCUIT TRANSFER function Biquad filter operationAL AMPLIFIER
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Iterated Function System-Based Crossover Operation for Real-Coded Genetic Algorithm
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作者 S. H. Ling 《Journal of Intelligent Learning Systems and Applications》 2015年第2期37-41,共5页
An iterated function system crossover (IFSX) operation for real-coded genetic algorithms (RCGAs) is presented in this paper. Iterated?function system (IFS) is one type of fractals that maintains a similarity character... An iterated function system crossover (IFSX) operation for real-coded genetic algorithms (RCGAs) is presented in this paper. Iterated?function system (IFS) is one type of fractals that maintains a similarity characteristic. By introducing the IFS into the crossover operation, the RCGA performs better searching solution with a faster convergence in a set of benchmark test functions. 展开更多
关键词 GENETIC ALGORITHM ITERATED FUNCTION SYSTEM CROSSOVER operation
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3G-oriented Business and Operations Support System
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作者 Gong Weichao Wang Jianxiong (Central Academy of ZTE Corporation, Nanjing 210012, China) 《ZTE Communications》 2006年第1期30-34,共5页
The diversity of services of Third-Generation (3G) wireless systems, the rapid development of new services and the big number of entities on the value chain would be the new challenges when building and operating 3G n... The diversity of services of Third-Generation (3G) wireless systems, the rapid development of new services and the big number of entities on the value chain would be the new challenges when building and operating 3G networks. A solution to these challenges is to build a new Business and Operations Support System (BOSS). Considering the numerous varieties of 3G services as well as the QoS requirements, it is suggested that operators should integrate the existing Business Support Systems (BSS) and Operations Support Systems (OSS), perfect the Customer Relationship Management (CRM), make the systems adapt to the life cycle of data, information and services, and make steady progress in standardization work. 展开更多
关键词 BOSS 中兴 2003 BSS oriented Business and operations Support System SCDMA CRM 通信世界 通讯技术
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Effects of general anesthesia on coagulation function, stress response and other correlation factors in patients undergoing abdominal operation
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作者 Yong Li Ling Zhao Jin-Yu Duan 《Journal of Hainan Medical University》 2018年第23期25-29,共5页
Objective:To study the effects of general anesthesia on coagulation function, stress response and other correlation factors in patients undergoing abdominal operation.Methods: To select 94 cases of patients undergoing... Objective:To study the effects of general anesthesia on coagulation function, stress response and other correlation factors in patients undergoing abdominal operation.Methods: To select 94 cases of patients undergoing abdominal operation in our hospital from February 2016 to April 2018, divided into the control group and observation group, 47 cases in each group. On the basis of the same pre-processing, the patients in the control group were given epidural anesthesia, and the patients in the observation group received general anesthesia, to detect and compare the coagulation function, stress response and other correlation factors.Results:At T1, the levels of coagulation function (D-Dimer, APTT, PT, PLT), stress response (COR, ACTH, CRP, ET-1) and other correlation factors (IL-23, IL-32, M-CSF, PRL, PCT, NO, TNF-α) between the two groups had no statistical difference (P>0.05). At T2 and T3, the levels of coagulation function(D-Dimer), stress response (COR, ACTH, CRP, ET-1) and other correlation factors (IL-23, IL-32, M-CSF, PRL, PCT, NO, TNF-α) between the two groups had statistical difference (P<0.05).Conclusion:Application of general anesthesia in abdominal endoscopic operation, there was no significant change in coagulation function compared with epidural anesthesia, it could maintain stable coagulation function, but it had a better stabilizing effect on stress response index and other correlation factor such as IL-23, IL-32, M-CSF, PRL, PCT, NO and TNF-α, it was worthy of further clinical study. 展开更多
关键词 ABDOMINAL operation General ANESTHESIA COAGULATION function Stress response CORRELATION FACTOR
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The Separation of Powers from Functions and the Establishment of a New Structure of Management and Operation of State-owned Assets
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作者 Zhou Li-qun Ph. D. of Economics. Associate Professor of Institute of Economics of NANKAI UNIVERSITY. Deputy Dean of College of Economics, NANKAI UNIVERSITY 《南开经济研究》 CSSCI 北大核心 1994年第S3期13-18,共6页
The development of the socialist market economy demands the furtherintensification of the reform of the management operating system (MOS)of the state-owned assets, the strengthening of the efficiency in the man-agemen... The development of the socialist market economy demands the furtherintensification of the reform of the management operating system (MOS)of the state-owned assets, the strengthening of the efficiency in the man-agement of state-owned assets,and the improvement of the operating bene- 展开更多
关键词 The Separation of Powers from Functions and the Establishment of a New Structure of Management and operation of State-owned Assets
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Esophageal nasopharyngeal catheter in the wake-up anesthesia of the brain function area operations
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作者 蔡铁良 《外科研究与新技术》 2011年第3期219-220,共2页
Objective To evaluate the feasibility and safety of the self developed sound outside the ventilation device-esophageal nasopharynx catheter in brain functional areas surgery applications. Methods 13 patients involved ... Objective To evaluate the feasibility and safety of the self developed sound outside the ventilation device-esophageal nasopharynx catheter in brain functional areas surgery applications. Methods 13 patients involved functional areas of brain surgery were chosed. After induction of general anesthesia,the catheters were placed in the esophagus,then connected to anesthesia machines to an external 展开更多
关键词 Esophageal nasopharyngeal catheter in the wake-up anesthesia of the brain function area operations area
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A simulation-based software to support the real-time operational parameters selection of tunnel boring machines
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作者 Yaman Zendaki Ba Trung Cao +2 位作者 Abdullah Alsahly Steffen Freitag Gunther Meschke 《Underground Space》 SCIE EI 2024年第1期176-196,共21页
With the fact that the main operational parameters of the construction process in mechanized tunneling are currently selected based on monitoring data and engineering experience without exploiting the advantages of co... With the fact that the main operational parameters of the construction process in mechanized tunneling are currently selected based on monitoring data and engineering experience without exploiting the advantages of computer methods,the focus of this work is to develop a simulation-based real-time assistant system to support the selection of operational parameters.The choice of an appropriate set of these parameters(i.e.,the face support pressure,the grouting pressure,and the advance speed)during the operation of tunnel boring machines(TBM)is determined by evaluating different tunneling-induced soil-structure interactions such as the surface settlement,the associated risks on existing structures and the tunnel lining behavior.To evaluate soil-structure behavior,an advanced process-oriented numerical simulation model based on the finite cell method is utilized.To enable the real-time prediction capability of the simulation model for a practical application during the advancement of TBMs,surrogate models based on the Proper Orthogonal Decomposition and Radial Basis Functions(POD-RBF)are adopted.The proposed approach is demonstrated through several synthetic numerical examples inspired by the data of real tunnel projects.The developed methods are integrated into a user-friendly application called SMART to serve as a support platform for tunnel engineers at construction sites.Corresponding to each user adjustment of the input parameters,i.e.,each TBM driving scenario,approximately two million outputs of soil-structure interactions are quickly predicted and visualized in seconds,which can provide the site engineers with a rough estimation of the impacts of the chosen scenario on structural responses of the tunnel and above ground structures. 展开更多
关键词 Numerical simulation Surrogate model Real-time prediction Proper orthogonal decomposition Radial basis functions TBM operation Smart construction
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A systematic literature review of human-centered design approach in single pilot operations 被引量:1
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作者 Guoqing WANG Min LI +1 位作者 Miao WANG Dongjin DING 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2023年第11期1-23,共23页
Single Pilot Operations(SPO),as a NextGen concept of operation,can save both crew costs and human resources for airlines,and has attracted the attention of aviation researchers.To explore in advance the problems that ... Single Pilot Operations(SPO),as a NextGen concept of operation,can save both crew costs and human resources for airlines,and has attracted the attention of aviation researchers.To explore in advance the problems that the introduction of SPO into the aviation system would bring,the Human-Centered Design(HCD)approach has been widely used in the development of SPO.A systematic review of the progress of HCD approach in SPO research can promote further development of SPO.In this paper,the literature resources of SPO were firstly retrieved from scientific research databases by subject search and were used as the input of scientometric analysis to obtain the highly cited literature,the number of annual publications,and the co-authorship network,which enables readers to understand the research trends and research groups of current SPO.Secondly,the development,application,and research process of the HCD approach were introduced in detail,and the progress of the HCD approach in SPO research was reviewed systematically from three aspects:concept design,function allocation,and system evaluation.Finally,limitations of current SPO research and future research directions for applying the HCD approach to SPO were also discussed. 展开更多
关键词 Concept design Function allocation Human-Centered Design(HCD) Scientometric analysis Single Pilot operations(SPO) System evaluation
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Density functional theory for molecular orientation of hard rod fluids in hard slits
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作者 曹达鹏 程礼盛 汪文川 《Chinese Physics B》 SCIE EI CAS CSCD 2007年第8期2296-2303,共8页
A density functional theory (DFT) is used to investigate molecular orientation of hard rod fluids in a hard slit. The DFT approach combines a modified fundamental measure theory (MFMT) for excluded-volume effect w... A density functional theory (DFT) is used to investigate molecular orientation of hard rod fluids in a hard slit. The DFT approach combines a modified fundamental measure theory (MFMT) for excluded-volume effect with the first order thermodynamics perturbation theory for chain connectivity. In the DFT approach, the intra-molecular bonding orientation function is introduced. We consider the effects of molecular length (i.e. aspect ratio of rod) and packing fraction on the orientations of hard rod fluids and flexible chains. For the flexible chains, the chain length has no significant effect while the packing fraction shows slight effect on the molecular orientation distribution. In contrast, for the hard rod fluids, the chain length determines the molecular orientation distribution, while the packing fraction has no significant effect on the molecular orientation distribution. By making a comparison between molecular orientations of the flexible chain and the hard rod fluid, we find that the molecular stiffness distinctly affects the molecular orientation. In addition, partitioning coefficient indicates that the longer rodlike molecule is more difficult to enter the confined phase, especially at low bulk packing fractions. 展开更多
关键词 density functional theory rodlike chain molecular orientation flexible chain
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Effects of task orientation on subsequent source memory as revealed by functional MRI
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作者 Xiuyan Guo Lei Zhu +3 位作者 Li Zheng Jianqi Li Qianfeng Wang Zhiliang Yang 《Neural Regeneration Research》 SCIE CAS CSCD 2013年第26期2424-2431,共8页
Episodic memories are composed of various interrelated elements, including those specific to items of central interest and those pertaining to related features, such as the color, shape, size, spatial location, tempor... Episodic memories are composed of various interrelated elements, including those specific to items of central interest and those pertaining to related features, such as the color, shape, size, spatial location, temporal order, and media or modalities of presentation. Memory about a core item (such as a word, object, or picture) is called item memory while memory about the context or related fea- tures of a core item is defined as source memory. What determines which sources within an episode are successfully remembered is of particular interest to researchers. Behavioral evidence suggests that the orientation of a memory task influences whether the related source of the item will be re- membered later. This study explored changes in the hippocampus and prefrontal cortex while par- ticipants completed two tasks: an item-oriented task and a source-oriented task. We used functional MRI to investigate the neural mechanisms by which task orientation influences source encoding. We found that subsequent source memory effects in the right prefrontal cortex and hippocampus were modulated by task orientation, whereas task orientation modulated item memory effects in the prefrontal cortex. These findings highlight the possibility that the hippocampus contributes to the intentional encoding of item-source associations, whereas the prefrontal cortex is biased toward processing information to which attention is directed. 展开更多
关键词 neural regeneration NEUROPSYCHOLOGY learning source memory task orientation hippocampus prefrontal cortex functional MRI grants-supported paper NEUROREGENERATION
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公立医院绩效考核背景下某三级医院落实功能定位的案例分析 被引量:1
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作者 张文 张欣欣 +13 位作者 许莹 李汶嘉 闫学丽 张肖在 杨晓雨 康娅 胡颖辉 孔德莹 郭艺萍 张阳华 樊书娟 牟怡平 李红霞 左煌 《现代医院》 2024年第1期71-75,共5页
公立医院绩效考核,为各级公立医院的发展指明了方向。某三甲医院在医院功能定位落实过程中,总结了现阶段医院发展面临的诸多问题,概括为以下四个方面:①精细化管理程度不足;②学科发展方向不明晰;③医疗运行效率提升遇到瓶颈;④支付方... 公立医院绩效考核,为各级公立医院的发展指明了方向。某三甲医院在医院功能定位落实过程中,总结了现阶段医院发展面临的诸多问题,概括为以下四个方面:①精细化管理程度不足;②学科发展方向不明晰;③医疗运行效率提升遇到瓶颈;④支付方式改革给医院带来了新挑战。针对以上问题,医院于2022年5月启动了精细化管理实践。以外科科室为试点,通过信息系统建设为精细化管理提升奠定基础,通过管理流程优化提高医疗运行效率,通过亚专科和学科联盟建设提高学科整体竞争力,通过调整绩效考核指标体系发挥绩效激励作用。以上措施有效提升了医院整体的医疗服务能力及效率,为医院高质量发展提供了助力。 展开更多
关键词 公立医院 绩效考核 功能定位 精细化管理
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企业资源配置战略与债券信用评级 被引量:1
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作者 张新民 丁璇 杨道广 《财经问题研究》 CSSCI 北大核心 2024年第2期64-75,共12页
企业战略作为企业全局性、长期性资源配置的重要规划,对企业经营活动具有重要影响,也必然会影响企业的融资行为。本文从企业战略视角出发,以2008—2020年中国A股上市公司为研究对象,运用固定效应模型探究了企业资源配置战略对债券信用... 企业战略作为企业全局性、长期性资源配置的重要规划,对企业经营活动具有重要影响,也必然会影响企业的融资行为。本文从企业战略视角出发,以2008—2020年中国A股上市公司为研究对象,运用固定效应模型探究了企业资源配置战略对债券信用评级的影响。研究发现:相对于经营主导型企业,投资主导型企业的债券信用评级更低,并且该结论在处理内生性问题和进行一系列稳健性检验后依然成立。异质性分析发现,企业资源配置战略对债券信用评级的影响在非国有企业和分析师跟踪人数多的企业中更明显。中介效应检验结果表明,企业资源配置战略通过作用于企业违约风险而影响债券信用评级。本文的研究结论对发债企业、信用评级机构和债券市场投资者具有重要启示意义。 展开更多
关键词 企业资源配置战略 债券信用评级 企业违约风险 投资主导型企业 经营主导型企业
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基于改进YOLOv5s的小目标检测算法 被引量:6
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作者 贵向泉 秦庆松 孔令旺 《计算机工程与设计》 北大核心 2024年第4期1134-1140,共7页
针对当前主流目标检测算法对图像中远距离小目标产生的漏检、误检等问题,提出一种改进YOLOv5s的小目标检测算法。在模型训练过程中,通过引入Focal-EIOU定位损失函数,加强边界框的定位精度;在骨干网络中,通过添加小目标检测层,提高小目... 针对当前主流目标检测算法对图像中远距离小目标产生的漏检、误检等问题,提出一种改进YOLOv5s的小目标检测算法。在模型训练过程中,通过引入Focal-EIOU定位损失函数,加强边界框的定位精度;在骨干网络中,通过添加小目标检测层,提高小目标的检测精度;在Neck结构中,通过优化上采样算子和添加注意力机制,加强小目标的特征信息。实验结果表明,改进后的算法在VisDrone数据集上与YOLOv5s算法相比,mAP@small提高了3.2%,且检测速度满足实时性的要求,能够很好地应用于小目标检测任务中。 展开更多
关键词 YOLOv5s算法 小目标检测 损失函数 上采样算子 骨干网络 注意力机制 特征信息
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手术患者术后下肢深静脉血栓形成的术中预防方案分析 被引量:1
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作者 李双 宋秋英 +2 位作者 姚媛媛 张立维 陈晓峰 《血管与腔内血管外科杂志》 2024年第1期103-107,共5页
目的分析预防手术患者术后下肢深静脉血栓形成(LDVT)的术中应用方案。方法收集2022年3月至2023年2月于保定市第二中心医院收治的256例手术患者的临床资料,将2022年9月前未应用术中改良方案的患者作为常规组(n=119),将2022年9月开始应用... 目的分析预防手术患者术后下肢深静脉血栓形成(LDVT)的术中应用方案。方法收集2022年3月至2023年2月于保定市第二中心医院收治的256例手术患者的临床资料,将2022年9月前未应用术中改良方案的患者作为常规组(n=119),将2022年9月开始应用术中改良方案的患者作为改良组(n=137)。比较两组患者的手术指标(手术时间、术中出血量、术后卧床时间、住院时间和配合度评分)、血流动力学指标(心率、平均动脉压)、手术前后股静脉血流指标(峰值血流速度、平均血流速度和血流量)、手术前后凝血功能指标[凝血酶原时间(PT)、活化部分凝血活酶时间(APTT)、纤维蛋白原(FIB)、凝血酶时间(TT)和D-二聚体(D-D)]及术后LDVT的发生情况。结果改良组患者的手术时间、术后卧床时间、住院时间均明显短于常规组患者,术中出血量明显少于常规组患者,配合度评分明显高于常规组患者,差异均有统计学意义(P﹤0.01)。入室后,两组患者的心率、平均动脉压比较,差异均无统计学意义(P﹥0.05);术中10 min、术毕即刻,改良组患者的心率、平均动脉压均低于常规组患者,差异均有统计学意义(P﹤0.05)。术后,改良组患者股静脉的峰值血流速度、平均血流速度、血流量均高于常规组患者,差异均有统计学意义(P﹤0.01)。术后,改良组患者的PT、APTT、TT均长于常规组患者,D-D、FIB水平均低于常规组患者,LDVT的发生率低于常规组患者,差异有统计学意义(P﹤0.05)。结论手术室人员于术中应用改良方案能够改善患者术中血流动力学,提高手术配合度,降低术中出血量,从而减轻术后血液高凝状态,促进术后下肢静脉血液回流,降低术后LDVT的发生风险。 展开更多
关键词 手术室 血流动力学 凝血功能 下肢深静脉血栓形成
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公益诉讼惩罚性赔偿责任的体系定位 被引量:2
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作者 杨会新 王富世 《苏州大学学报(哲学社会科学版)》 CSSCI 北大核心 2024年第3期73-85,共13页
独立的制度空间是发挥独立价值的基础,公益诉讼惩罚性赔偿首先需要厘清的是其与刑事罚金、行政罚款的关系,讨论在刑事罚金和行政罚款之下还有无独立的制度空间。在功能上,三者具有同质性,均旨在惩罚遏制违法行为;在适用的案件范围上,食... 独立的制度空间是发挥独立价值的基础,公益诉讼惩罚性赔偿首先需要厘清的是其与刑事罚金、行政罚款的关系,讨论在刑事罚金和行政罚款之下还有无独立的制度空间。在功能上,三者具有同质性,均旨在惩罚遏制违法行为;在适用的案件范围上,食品公益诉讼惩罚性赔偿与食品犯罪趋同,并被行政处罚所包含;在金钱罚手段上,针对食品违法行为,《刑法》与《食品安全法》规定了足够的金钱罚手段,客观上无需公益诉讼惩罚性赔偿予以补足。因此,公益诉讼惩罚性赔偿并无大范围适用的必要。但公益诉讼惩罚性赔偿相对于刑事处罚与行政处罚具有自身的制度优势,其适用范围应据此确定,以形成相互区分又有机衔接的规制体系。 展开更多
关键词 公益诉讼惩罚性赔偿 刑事罚金 行政罚款 功能定位 案件范围
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