期刊文献+
共找到16篇文章
< 1 >
每页显示 20 50 100
缩短平均住院日在提高医院运营率中的作用 被引量:7
1
作者 王丽 徐朗 《中国卫生标准管理》 2017年第12期17-19,共3页
平均住院日可全面反映出医院的日常工作效率、管理水平与工作质量,对平均住院日进行缩短,有利于患者单次住院费用的降低,还能够将病床周转率进一步提高,利于将卫生资源利用率提高,可使得医院经济效益有效提高,近些年来,我院着重于缩短... 平均住院日可全面反映出医院的日常工作效率、管理水平与工作质量,对平均住院日进行缩短,有利于患者单次住院费用的降低,还能够将病床周转率进一步提高,利于将卫生资源利用率提高,可使得医院经济效益有效提高,近些年来,我院着重于缩短平均住院日,提高医院的运营效率等。文章主要分析了平均住院日的概念、平均住院日的重要性、复杂性、对应措施等,旨在加强医院的运营效益,促进医院的可持续发展。 展开更多
关键词 运营率 平均住院日 作用
下载PDF
我国开放式股票型基金运营费率问题研究
2
作者 关旭 《世界经济情况》 2008年第10期47-53,共7页
本文在既有研究成果的基础上,运用因素模型对我国开放式股票型基金的运营费率与回报率之间的关系进行了实证研究,并进一步运用信息经济学的方法,从信息搜寻成本角度分析了运营费率与基金业绩之间的关系,并对开放式基金的运营费率的设计... 本文在既有研究成果的基础上,运用因素模型对我国开放式股票型基金的运营费率与回报率之间的关系进行了实证研究,并进一步运用信息经济学的方法,从信息搜寻成本角度分析了运营费率与基金业绩之间的关系,并对开放式基金的运营费率的设计安排提出建议。 展开更多
关键词 开放式股票型基金 运营业绩 因素模型 信息搜寻成本
下载PDF
我国开放式基金的运营费用与基金业绩实证研究 被引量:2
3
作者 江菲 《华东经济管理》 CSSCI 2012年第2期158-160,共3页
文章研究我国开放式基金运营费率的影响因子,以及其与基金业绩表现之间的关系,其中用Jensen’s alpha作为基金业绩的衡量指标,体现基金管理人的综合管理能力。通过对2009年运行的开放式证券投资基金进行实证分析,结果表明:(1)基金的运... 文章研究我国开放式基金运营费率的影响因子,以及其与基金业绩表现之间的关系,其中用Jensen’s alpha作为基金业绩的衡量指标,体现基金管理人的综合管理能力。通过对2009年运行的开放式证券投资基金进行实证分析,结果表明:(1)基金的运营费率与其业绩表现呈现非线性的显著负相关关系,基金的业绩越高,其运营费率越低,且降低幅度趋缓,说明为了维持较高的基金业绩表现,可能需要投入更高的边际成本。(2)基金的规模越大,机构投资者持有比例越高,基金运营费率越低;债券型基金的运营费率相对较低。 展开更多
关键词 开放式基金 运营 Jensen's ALPHA
下载PDF
对二甲苯难续好年景
4
作者 钱伯章 《合成纤维》 CAS 2019年第3期54-54,共1页
2018年,因为聚酯链的需求增速超过供应,对二甲苯(PX)行业利润率得到显著提高,但业界认为由于产能迅速扩张,2019年这一状况很难持续。2018年PX市场良好,亚洲PX多数时间震荡走高。年内前3个季度,亚洲PX价格水平较上年提高一个台阶。另外,... 2018年,因为聚酯链的需求增速超过供应,对二甲苯(PX)行业利润率得到显著提高,但业界认为由于产能迅速扩张,2019年这一状况很难持续。2018年PX市场良好,亚洲PX多数时间震荡走高。年内前3个季度,亚洲PX价格水平较上年提高一个台阶。另外,聚酯链走高也对PX价格形成有力提振,但好景没能持续。 展开更多
关键词 对二甲苯 利润 运营率 IHS 聚酯链 PX
下载PDF
A Model of Application System for Man-Machine-Environment System Engineering in Vessels Based on IDEF0 被引量:5
5
作者 ZhenShang Changhua Qiu Shifan Zhu 《Journal of Marine Science and Application》 2011年第3期347-357,共11页
Applying man-machine-environment system engineering(MMESE)in vessels is a method to improve the effectiveness of the interaction between equipment, environment, and humans for the purpose of advancing operating effici... Applying man-machine-environment system engineering(MMESE)in vessels is a method to improve the effectiveness of the interaction between equipment, environment, and humans for the purpose of advancing operating efficiency, performance, safety, and habitability of a vessel and its subsystems. In the following research, the life cycle of vessels was divided into 9 phases, and 15 research subjects were also identified from among these phases. The 15 subjects were systemized, and then the man-machine-environment engineering system application model for vessels was developed using the ICAM definition method 0 (IDEF0), which is a systematical modeling method. This system model bridges the gap between the data and information flow of every two associated subjects with the major basic research methods and approaches included, which brings the formerly relatively independent subjects together as a whole. The application of this systematic model should facilitate the application of man-machine-environment system engineering in vessels, especially at the conceptual and embodiment design phases. The managers and designers can deal with detailed tasks quickly and efficiently while reducing repetitive work. 展开更多
关键词 man-machine-environment system engineering (MMESE) ICA^M definition method 0 (IEDFO) VESSEL life cycle
下载PDF
Energy Efficient Switch Policy for Small Cells 被引量:1
6
作者 GAN Xiaoying WANG Luyang +4 位作者 FENG Xinxin LIU Jing YU Hui ZHANG Zhizhong LIU Haitao 《China Communications》 SCIE CSCD 2015年第1期78-88,共11页
Switch policy is essential for small cells to properly serve variable number of users in an energy efficient way.However,frequently switching small cell base stations(SBSs) may increase the network operating cost,espe... Switch policy is essential for small cells to properly serve variable number of users in an energy efficient way.However,frequently switching small cell base stations(SBSs) may increase the network operating cost,especially when there is an nonnegligible start-up energy cost.To this end,by observing the variety of user number,we focus on the design of a switch policy which minimize the cumulative energy consumption.A given user transmission rate is guaranteed and the capability of SBSs are limited as well.According to the knowledge on user number variety,we classify the energy consumption problem into two cases.In complete information case,to minimize the cumulative energy consumption,an offline solution is proposed according to critical segments.A heuristic algorithm for incomplete information case(HAIIC) is proposed by tracking the difference of cumulative energy consumption.The upper bound of the Energy Consumption Ratio(ECR) for HAIIC is derived as well.In addition,a practical Q-learning based probabilistic policy is proposed.Simulation results show that the proposed HAIIC algorithm is able to save energy efficiently. 展开更多
关键词 heterogeneous network small cell switch policy Q-LEARNING
下载PDF
Set methods of left-turn waiting zone at signalized intersection 被引量:2
7
作者 丁威 杨晓光 杨小龙 《Journal of Harbin Institute of Technology(New Series)》 EI CAS 2009年第3期318-321,共4页
To maximize the number of vehicles passing by the stop-line in a cycle and improve the operation efficiency of intersection in China, the settlement of left-turn lane waiting-zone is becoming prevailing. Based on conf... To maximize the number of vehicles passing by the stop-line in a cycle and improve the operation efficiency of intersection in China, the settlement of left-turn lane waiting-zone is becoming prevailing. Based on conflicting-point method, the internal mechanism of left-turn flow after stopping line was analyzed through taking postposition left-turn lane waiting-zone intersection for instance. The relationship between the first left-turn vehicle and the last vehicle of previous phase passing the conflicting point was expounded. According to the time of successive arriving of two vehicle flows at conflicting-point, the reasonable layout for waiting area of left-turn vehicles was researched when the clearance index was less than O. The results suggest that the appropriate layout for waiting area of left-turning vehicles can improve the operation efficiency of intersections. 展开更多
关键词 left-turn waiting zone collision point analysis methodology clearance index
下载PDF
绥化北林区西长发镇基本农田土地整理效益分析
8
作者 龙占江 李永新 刘淑芹 《黑龙江水利科技》 2007年第1期117-117,共1页
通过对绥化市北林区西长发镇基本农田土地整理项目进行财务分析、经济效益指标分析,证实该项目经济效益显著,切实可行。
关键词 年产值 净增产值 静态投资收益 静态投资回收期 单位投资水平 指标 基础设施 运营成本 运营成本
下载PDF
Recovery of Sillimanite from Beach Sands--An Operator's Nightmare?
9
作者 Chivukula Venkata Gopala Krishna Murty Leon Rademeyer +3 位作者 Natarajan JaiSankar Patruni Bhavya Manjeera Prasana-sampath Challa Venkata Ramachandra Murthy 《Journal of Earth Science and Engineering》 2013年第4期270-281,共12页
Sillimanite, chemically named aluminum silicate, 3Al2O3SiO2 is one of the three forms of alumino silicate polymorphs and commonly encountered in aluminous metamorphic, plutonic and volcanic rocks and their weathering ... Sillimanite, chemically named aluminum silicate, 3Al2O3SiO2 is one of the three forms of alumino silicate polymorphs and commonly encountered in aluminous metamorphic, plutonic and volcanic rocks and their weathering products. Traditionally in India, sillimanite is upgraded by froth floatation technique using oleic acid as a collector cum frother, sodium silicate as depressant and soda ash as pH regulator. At TSPL (Trimex Sands Pvt Ltd), conventional mechanical float cells are installed to float sillimanite. In addition to the usual problems associated with conventional cells, poor flow ability of the sillimanite concentrate is experienced in dry circuit due to the presence of sodium oleate. Fine garnet in the sillimanite concentrate contributes to high iron content in the final product, making sillimanite separation a nightmare for operators (lower recoveries coupled with inferior grades). Various efforts were made to improve the performance of the circuit such as introduction of additional frother like MIBC (methyl ISO butyl carbinol), optimizing the operating parameters such as pulp density, collector dosage, depressant dosage, air flow rate, pH etc., use of collector aids, stage wise addition of reagents etc.. The challenges faced to produce a sillimanite product with stringent quality norms and the efforts made to improve the grade and recovery are described in this paper. 展开更多
关键词 SILLIMANITE froth flotation conventional mechanical cell.
下载PDF
Transport Layer Optimization for Cloud Computing Applications via Satellite: TCP Noordwijk+ 被引量:1
10
作者 M. Luglio C. Roseti F. Zampognaro 《China Communications》 SCIE CSCD 2014年第12期105-119,共15页
Cloud computing can significantly improve efficiency in Internet utilization and data management.Several cloud applications(file sharing,backup,data up/download etc.) imply transfers of large amount of data without re... Cloud computing can significantly improve efficiency in Internet utilization and data management.Several cloud applications(file sharing,backup,data up/download etc.) imply transfers of large amount of data without real-time requirements.In several use-cases cloud-computing solutions reduce operational costs and guarantee target QoS.These solutions become critical when satellite systems are utilized,since resources are limited,network latency is huge and bandwidth costs are high.Using satellite capacity for cloud-computing bulk traffic,keeping acceptable performance of interactive applications,is very important and can limit the connectivity costs.This goal can be achieved installing in the Set Top Box(STB) a proxy agent,to differentiate traffic and assign bandwidth according to priority,leaving spare capacity to bulk cloud computing traffic.This aim is typically reached using a specific QoS architecture,adding functional blocks at network or lower layers.We propose to manage such a process at transport layer only.The endpoint proxy implements a new transport protocol called TCP Noordwijk+,introducing a flow control differentiation capability.The proxy includes TPCN+ which efficiently transfers low-priority bulk data and handles interactive data,keeping a high degree of friendliness.The outcomes of Ns-2simulations confirm applicability and good performance of the proposed solution. 展开更多
关键词 TCP-Noordwijk+ cloud computing DVB-RCS satellite QoS Ns-2 bulk data
下载PDF
How to Improve Efficiency of Telecom Energy
11
作者 Changling Zhang Lu Xu Jiangang Liu 《Journal of Energy and Power Engineering》 2016年第1期64-68,共5页
High OPEX (operation expenditure), pollution and complicated environment are challenges which telecom operators have to conquer to improve energy efficiency. Integration and flexibility are tendencies for telecom en... High OPEX (operation expenditure), pollution and complicated environment are challenges which telecom operators have to conquer to improve energy efficiency. Integration and flexibility are tendencies for telecom energy solution development, also the keys to improve energy efficiency. With plentiful design and implementation experience, the author provides a three-dimensional energy matrix model to design a perfect energy system, and some practical measures of integration and flexibility are also shared from mechanical to electrical, from single site to whole network. 展开更多
关键词 Energy efficiency three-dimension energy matrix model optimization practices.
下载PDF
The stability research of coated sodium butyrate
12
作者 Guoshun Chen Zhengfei Xu Min Zhao 《Feed & Livestock》 2011年第1期40-45,共6页
The objective of this study is to research the stability of sodium butyrate in feedstuff. The sodium butyrate with three types of coated, common and granule was produced at three differ- ent feed mills and sampled and... The objective of this study is to research the stability of sodium butyrate in feedstuff. The sodium butyrate with three types of coated, common and granule was produced at three differ- ent feed mills and sampled and determined the content. The results showed that the retention rate of common sodium butyrate was 7.35% through carrier difference, mixing, granulating, stomach and digestive tract forepart. The retention rates of granule and coated sodium butyrate (the content of sodium butyrate is 30%) were 17.04% and 72.66% respectively. Therefore, the stability of coated sodium butyrate is obviously higher than common and granule sodium butyrate. 展开更多
关键词 sodium butyrate COATED STABILITY
下载PDF
A New Lie Algebra and Its Related Liouville Integrable Hierarchies
13
作者 王惠 王新赠 +1 位作者 刘国栋 杨记明 《Communications in Theoretical Physics》 SCIE CAS CSCD 2010年第9期407-411,共5页
A new Lie algebra G and its two types of loop algebras G1 and G2 are constructed. Basing on G1 and G2, two different isospectral problems are designed, furthermore, two Liouville integrable soliton hierarchies are obt... A new Lie algebra G and its two types of loop algebras G1 and G2 are constructed. Basing on G1 and G2, two different isospectral problems are designed, furthermore, two Liouville integrable soliton hierarchies are obtained respectively under the framework of zero curvature equation, which is derived from the compatibility of the isospectral problems expressed by Hirota operators. At the same time, we obtain the Hamiltonian structure of the first hierarchy and the bi-Hamiltonian structure of the second one with the help of the quadratic-form identity. 展开更多
关键词 Lie algebra Liouville integrable hierarchy Hirota operator Quadratic-form identity
下载PDF
DEA-based Malmquist Productivity Index Measure of Operating Efficiencies:New Insights with an Application to Container Ports 被引量:3
14
作者 付博新 宋向群 郭子坚 《Journal of Shanghai Jiaotong university(Science)》 EI 2009年第4期490-496,共7页
To investigate the long-term operating efficiencies of container ports, we extend the work of previous researches to present a new systemic and improved method of data envelopment analysis (DEA)-based Malmquist prod... To investigate the long-term operating efficiencies of container ports, we extend the work of previous researches to present a new systemic and improved method of data envelopment analysis (DEA)-based Malmquist productivity index (MPI) in this paper. An approach based on both panel data and multi-inputs/outputs is considered comprehensively, and aims at measuring the operating efficiencies of 10 leading container ports in China from 2001 to 2006 by applying this new systematic influence factor of total factor productivity change is the calculation method. The results illustrate that the main technology change, and the container transportation of these 10 ports is on the healthy development status and will recover and grow reposefully in the following years 展开更多
关键词 port operating efficiency Malmquist productivity index (MPI) data envelopment analysis (DEA)
原文传递
Explicit constants for Hardy’s inequality with power weight on n-dimensional product spaces 被引量:14
15
作者 WANG ShiMo LU ShanZhen YAN DunYan 《Science China Mathematics》 SCIE 2012年第12期2469-2480,共12页
In this paper, Hardy operator H on n-dimensional product spaces G = (0, ∞)n and its adjoint operator H* are investigated. We use novel methods to obtain two main results. One is that we characterize the sufficient an... In this paper, Hardy operator H on n-dimensional product spaces G = (0, ∞)n and its adjoint operator H* are investigated. We use novel methods to obtain two main results. One is that we characterize the sufficient and necessary conditions for the operators H and H* being bounded from Lp(G, xα) to Lq(G, xβ), and the bounds of the operators H and H* are explicitly worked out. The other is that when 1 < p = q < +∞, norms of the operators H and H* are obtained. 展开更多
关键词 n-dimensional Hardy operator Hausdorff-Young inequality power weight
原文传递
Optimal concavity of some Hessian operators and the prescribed σ_2 curvature measure problem 被引量:4
16
作者 CHEN ChuanQiang 《Science China Mathematics》 SCIE 2013年第3期639-651,共13页
In this paper, we consider a minimal value problem and obtain an algebraic inequality. As an application, we obtain the optimal concavity of some Hessian operators and then establish the C2 a priori estimate for a cla... In this paper, we consider a minimal value problem and obtain an algebraic inequality. As an application, we obtain the optimal concavity of some Hessian operators and then establish the C2 a priori estimate for a class of prescribed σ2 curvature measure equations. 展开更多
关键词 Hessian operator curvature measures k-convex k-admissible solution
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部