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宽待艾滋病感染者的经济学分析
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作者 曹荣庆 《卫生经济研究》 2003年第8期16-16,共1页
关键词 艾滋病感染 经济学 负向外溢性 吸毒 私权公化 公权维私
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Optimizing reasoning in EL^(++) ontologies by using boundary-based module
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作者 方俊 郭雷 杨宁 《Journal of Southeast University(English Edition)》 EI CAS 2009年第4期482-485,共4页
In order to optimize ontology reasoning, a novel boundary-based modular extraction method is introduced for ontologies in EL^++ description logics. The proposed module extraction method is capable of identifying rel... In order to optimize ontology reasoning, a novel boundary-based modular extraction method is introduced for ontologies in EL^++ description logics. The proposed module extraction method is capable of identifying relevant axioms in an ontology based on the notion of boundaries of symbols, with respect to a given reasoning task. Exactness of the method is ensured by discovering all axioms in the original ontology that may be directly or indirectly relevant to boundaries of symbols used in the reasoning task. Compactness of the method is ensured by boundary partition and intersection operation performed in the process of module extraction. The theoretical foundation and a practical algorithm for computing the proposed axiom-based modules are presented. The proposed algorithm is implemented for the description logic EL^++. Experimental results on realworld ontologies show that, based on the proposed modularization method, the performance of ontology reasoning can be significantly improved. 展开更多
关键词 BOUNDARY module extraction reasoning optimization axiom-based module
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Innovative Practice of Science and Technology Supported Western Village Public Cultural Services in China
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作者 于开锋 金颖若 《Agricultural Science & Technology》 CAS 2017年第12期2628-2632,共5页
The shortage and inefficiency of public cultural services are common problems in China, especially in the western regions. Baiyun District has made use- ful exploration to the construction of rural public cultural ser... The shortage and inefficiency of public cultural services are common problems in China, especially in the western regions. Baiyun District has made use- ful exploration to the construction of rural public cultural service system, network system, resource system, management system and service system. 展开更多
关键词 Public cultural service Western villages Science and technology Baiyun District
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New Color-Difference Formula Based on CIECAM97s 被引量:1
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作者 宦晖 李为 赵达尊 《Journal of Beijing Institute of Technology》 EI CAS 2001年第2期149-152,共4页
To deduce a new color difference formula based on CIE 1997 Color Appearance Model(CIECAM97s), a color space J a 1 b 1 is first constructed with color appearance descriptors J,a,b in CIECAM97s. The new f... To deduce a new color difference formula based on CIE 1997 Color Appearance Model(CIECAM97s), a color space J a 1 b 1 is first constructed with color appearance descriptors J,a,b in CIECAM97s. The new formula is then deduced in the space and named CDF CIECAM97s. The factors for lightness, chroma and hue correction in the formula are derived by linear regression according to BFD? CP data sets. It is found by statistical analysis that CDF CIECAM97s is in closer accordance with the visual assessments when compared with CMC(1∶1), CIE94 and CIE L *a *b * color difference formulae. Based on color appearance model, the new color difference formula can be used to predict color difference perception in a varity of different viewing conditions. 展开更多
关键词 CIECAM97s color difference formulae color space
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Study on Plant Landscape Design of Urban Comprehensive Park 被引量:3
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作者 胡牮 华鑫娜 颜玉娟 《Agricultural Science & Technology》 CAS 2017年第12期2563-2566,共4页
The urban comprehensive park is the main body of the urban environment construction, and the plant landscape is the most important landscape element of the comprehensive park. It is helpful for the landscape design of... The urban comprehensive park is the main body of the urban environment construction, and the plant landscape is the most important landscape element of the comprehensive park. It is helpful for the landscape design of the comprehensive park to improve the environmental quality and the sustainable development of the city. Taking the "Nanjiang Park" in Xiaoshan District of Hangzhou as the research object, the landscape design of plants was explored and analyzed. The results showed that there were significant differences in the application forms of plant land- scapes in different functional zones in comprehensive parks. The specific forms of the garden elements had different needs of plant landscape construction. According to the results of case studies, it found that comprehensive parks could improve the functions, create the aesthetic sense, enhance the atmosphere and enhance the taste through plant landscape design. In addition, corresponding suggestions were put forward according to the current situation with the aim to provide references for the future plant landscape design related with garden greens. 展开更多
关键词 Plant landscape Comprehensive park Function zoning Landscape ele-ments Optimization analysis
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A new oral formulation for the release of sodium butyrate in the ileo-cecal region and colon 被引量:8
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作者 Aldo Roda Patrizia Simoni +4 位作者 Maria Magliulo Paolo Nanni Mario Baraldini Giulia Roda Enrico Roda 《World Journal of Gastroenterology》 SCIE CAS CSCD 2007年第7期1079-1084,共6页
AIM: To develop a new formulation with hydroxy propyl methyl cellulose and Shellac coating for extended and selective delivery of butyrate in the ileo-caecal region and colon. METHODS: One-gram sodium butyrate coate... AIM: To develop a new formulation with hydroxy propyl methyl cellulose and Shellac coating for extended and selective delivery of butyrate in the ileo-caecal region and colon. METHODS: One-gram sodium butyrate coated tablets containing ^13C-butyrate were orally administered to 12 healbhy subjects and 12 Crohn's disease patients and the rate of ^13C-butyrate absorption was evaluated by t3CO2 breath test analysis for eight hours. Tauroursodeoxycholic acid (500 rag) was co-administered as a biomarker of oro-ileal transit time to determine also the site of release and absorption of butyrate by the time of its serum maximum concentration. RESULTS: The coated formulation delayed the ^13C-butyrate release by 2-3 h with respect to the uncoated tablets. Sodium butyrate was delivered in the intestine of all subjects and a more variable transit time was found in Crohn's disease patients than in healthy subjects. The variability of the peak ^13CO2 in the kinetic release of butyrate was explained by the inter-subject variability in transit time. However, the coating chosen ensured an efficient release of the active compound even in patients with a short transit time. CONCLUSION: Simultaneous evaluation of breath ^13CO2 and tauroursodeoxycholic acid concentrationtime curves has shown that the new oral formulation consistently releases sodium butyrate in the ileo-cecal region and colon both in healthy subjects and Crohn's disease patients with variable intestinal transit time. This formulation may be of therapeutic value in inflammatory bowel disease patients due to the appropriate release of the active compound. 展开更多
关键词 Sodium butyrate Inflammatory boweldiseases Ulcerative colitis Crohn's disease Controlledrelease formulation PHARMACOKINETICS Stable isotope Breath test
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Nonlinear Absolute Nodal Coordinate Formulation of a Flexible Beam Considering Shear Effect 被引量:1
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作者 LIU Jin-yang(刘锦阳) +3 位作者 SHEN Ling-jie(沈凌杰) HONG Jia-zhen(洪嘉振) 《Journal of Shanghai Jiaotong university(Science)》 EI 2005年第4期424-428,共5页
Nonlinear modeling of a flexible beam with large deformation was investigated. Absolute nodal cooridnate formulation is employed to describe the motion, and Lagrange equations of motion of a flexible beam are derived ... Nonlinear modeling of a flexible beam with large deformation was investigated. Absolute nodal cooridnate formulation is employed to describe the motion, and Lagrange equations of motion of a flexible beam are derived based on the geometric nonlinear theory. Different from the previous nonlinear formulation with Euler-Bernoulli assumption, the shear strain and transverse normal strain are taken into account. Computational example of a flexible pendulum with a tip mass is given to show the effects of the shear strain and transverse normal strain. The constant total energy verifies the correctness of the present formulation. 展开更多
关键词 flexible beam absolute nodal coordinate formulation shear strain transverse normal strata
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Commercial Application of RMC Technology in the 1.5 Mt/a Hydrocracking Unit at Shanghai Petrochemical Company 被引量:1
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作者 XiongZhenlin WangYiguan +2 位作者 ZhangMaoying LinBaohua MaoYichao 《China Petroleum Processing & Petrochemical Technology》 SCIE CAS 2003年第3期33-37,共5页
The RMC technology developed by RIPP has been applied in a 1.5 Mt/a medium pressure hydrocracking unit at Shanghai Petrochemical Company. The unit was successfully put on stream in September 2002. Calibration of the p... The RMC technology developed by RIPP has been applied in a 1.5 Mt/a medium pressure hydrocracking unit at Shanghai Petrochemical Company. The unit was successfully put on stream in September 2002. Calibration of the performance of the commercial unit has shown that the RMC technology has higher hydrogenation activity and selectivity, and high quality product can be obtained under lower reaction temperature. The heavy naphtha with less than 0.5 ppm of sulfur and 58.5 m% potential aromatic content is a good feedstock for catalytic reforming unit. The diesel with less than 0.5 ppm of sulfur, 6.6 m% aromatics and cetane rating of 56 is a high-grade diesel fuel. The hydrocracked tail oil containing more than 14 m% hydrogen and mere 1.7m% aromatics could be used as a good feedstock for steam cracking process to produce ethylene. 展开更多
关键词 medium pressure HYDROCRACKING DIESEL tail oil
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Integration of axiomatic design and theory of inventive problem solving for conceptual design 被引量:1
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作者 田启华 《Journal of Chongqing University》 CAS 2009年第3期209-216,共8页
Axiomatic design (AD) and theory of inventive problem solving (TRIZ) are widely used in conceptual design. Both of them have limitations, however. We presented an integrated model of these two methods to increase the ... Axiomatic design (AD) and theory of inventive problem solving (TRIZ) are widely used in conceptual design. Both of them have limitations, however. We presented an integrated model of these two methods to increase the efficiency and quality of the problem solving process for conceptual design. AD is used for systematically defining and structuring a problem into a hierarchy. Sometimes, the design matrix is coupled in AD which indicates the functional requirements are coupled. TRIZ separation principles can be used to separate non-independent design parameters, which provide innovative solutions at each hierarchical level. We applied the integrated model to the heating and drying equipment of bitumen reproduction device. The result verifies that the integrated model can work very well in conceptual design. 展开更多
关键词 conceptual design axiomatic design theory of inventive problem solving integrated model drying cylinder
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A CSCW SYSTEM FOR BUILDING REVIEWING BY INTEGRATING GIS WITH OA 被引量:1
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作者 JIANG Jie CHEN Jun YAN Ronghua XU Lilin 《Geo-Spatial Information Science》 2000年第1期45-49,共5页
The process of urban building reviewing is a collaborative work by a group of urban planning staffs and land managers who are working with different departments of a organization. There are three ingredients for impro... The process of urban building reviewing is a collaborative work by a group of urban planning staffs and land managers who are working with different departments of a organization. There are three ingredients for improving the work efficiency, i.e., agile communication and interactive mechanisms, good information, effective processing and visualizing tools. In order to build a computer supported collaborative work (CSCW) system in Urban Planning and Land Administration Bureau in Changzhou Municapality, GIS was integrated with office automation (OA). The workflow and organizational structure had been re-engineered to meet the requirement of application of the new technology. Federated databases were constructed by assembling disparate sources of heterogeneous spatial and attribute data. Easy access to the data by contents was developed for promoting information sharing within the organization. Specific desktop spatial data handling tools were provided for delineating land lots or building layouts on large-scale digital maps. Office automation functions, including applications registering, reasonableness checking, opinions giving and exchanging, were developed and they permit printing and documents filing. The work efficiency in the organization has been improved by introducing the computer-based collaborative building reviewing system. 展开更多
关键词 CSCW System office automation
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Automated extraction of expressway road surface from mobile laser scanning data 被引量:3
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作者 TRAN Thanh Ha TAWEEP Chaisomphob 《Journal of Central South University》 SCIE EI CAS CSCD 2020年第7期1917-1938,共22页
This paper presents a voxel-based region growing method for automatic road surface extraction from mobile laser scanning point clouds in an expressway environment.The proposed method has three major steps:constructing... This paper presents a voxel-based region growing method for automatic road surface extraction from mobile laser scanning point clouds in an expressway environment.The proposed method has three major steps:constructing a voxel model;extracting the road surface points by employing the voxel-based segmentation algorithm;refining the road boundary using the curb-based segmentation algorithm.To evaluate the accuracy of the proposed method,the two-point cloud datasets of two typical test sites in an expressway environment consisting of flat and bumpy surfaces with a high slope were used.The proposed algorithm extracted the road surface successfully with high accuracy.There was an average recall of 99.5%,the precision was 96.3%,and the F1 score was 97.9%.From the extracted road surface,a framework for the estimation of road roughness was proposed.Good agreement was achieved when comparing the results of the road roughness map with the visual image,indicating the feasibility and effectiveness of the proposed framework. 展开更多
关键词 mobile laser scanning SEGMENTATION road surface EXPRESSWAY VOXELIZATION point cloud
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Application of Olefin-Reducing Catalyst in FCC Unit at Daqing Petrochemical Company 被引量:1
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作者 LiuXinfeng YangDaoxue +1 位作者 ZhangGuojing YaoHua 《China Petroleum Processing & Petrochemical Technology》 SCIE CAS 2003年第4期25-30,共6页
This article refers to the application of DOCO olefin-reducing catalyst developed by RIPP and manufactured by the Catalyst Factory of Changling Refining and Chemical Company in the 1.4 Mt/a RFCCU at Daqing Petrochemic... This article refers to the application of DOCO olefin-reducing catalyst developed by RIPP and manufactured by the Catalyst Factory of Changling Refining and Chemical Company in the 1.4 Mt/a RFCCU at Daqing Petrochemical Company. Results of operation over two months had revealed that this catalyst had good olefin-reducing ability and heavy oil converting ability adapted to paraffinic feedstock. The gasoline olefin yield had been reduced to 36.1 v% from 54.2 v% with gasoline RON rating decreased by 1.4 units. The induction period of gasoline had significantly increased to 952 mm, while the coke yield was increased by 0.05 percentage point with light oil yield dropping by only 0.02 percentage point. The FCC product distribution is favorable. 展开更多
关键词 catalyst OLEFIN product distribution octane number
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Development and CommercialApplication of RSDS-II Technology for Selective Hydrodesulfurization of FCC Naphtha 被引量:6
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作者 Qu Jinhua Xi Yuanbing +4 位作者 Li Mingfeng Pan Guangcheng Jin Xin Gao Xiaodong Nie Hong 《China Petroleum Processing & Petrochemical Technology》 SCIE CAS 2013年第3期1-6,共6页
The FCC naphtha selective hydrodesulfurization technology(RSDS-II)has been tested with different feedstocks in pilot scale.The results show that RSDS-II technology is viable in terms of its adaptability to different f... The FCC naphtha selective hydrodesulfurization technology(RSDS-II)has been tested with different feedstocks in pilot scale.The results show that RSDS-II technology is viable in terms of its adaptability to different feedstocks.To produce gasoline with a sulfur content of less than 50μg/g by the RSDS-II technology,the gasoline RON loss is less than 1.8,0.9and 0.2 units,respectively,upon processing the conventional high-sulfur and high-olefin FCC naphtha,the high-sulfur MIP naphtha,and the medium-sulfur or low-sulfur MIP naphtha.Upon using the naphtha produced from pre-hydrotreated FCC feedstock as the RSDS-II feedstock to manufacture gasoline with a sulfur content of lower than 10μg/g,the RON loss does not exceed 1.0 unit.The RSDS-II technology has been commercialized successfully at many refineries.The result of operating commercial RSDS-II unit at the Shanghai Petrochemical Company has revealed that upon processing a feedstock containing 38.7 v% —43.3 v% of olefins and 250—470 mg/g of sulfur,the sulfur content in the treated gasoline ranges from 33μg/g to 46μg/g and the RON loss is equal to only 0.3—0.6 units.Till now this RSDS-II unit has been operating smoothly over 30 months.Thanks to its high HDS activity and good selectivity,the RSDS-II technology can meet the refinery’s needs for adequate upgrading of gasoline. 展开更多
关键词 FCC naphtha selective HYDRODESULFURIZATION commercial application
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Evolution of Cooperation in Public Goods Games 被引量:1
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作者 夏承遗 张娟娟 +1 位作者 王祎玲 王劲松 《Communications in Theoretical Physics》 SCIE CAS CSCD 2011年第10期638-644,共7页
We investigate the evolution of cooperation with evolutionary public goods games based on finite populations, where four pure strategies: cooperators, defectors, punishers and loners who are unwilling to participate ... We investigate the evolution of cooperation with evolutionary public goods games based on finite populations, where four pure strategies: cooperators, defectors, punishers and loners who are unwilling to participate are considered. By adopting approximate best response dynamics, we show that the magnitude of rationality not only quantitatively explains the experiment results in [Nature (London) 425 (2003) 390], but also it will heavily influence the evolution of cooperation. Compared with previous results of infinite populations, which result in two equilibriums, we show that there merely exists a special equilibrium cooperation. In addition, we characterize that loner's and the relevant high value of bounded rationality will sustain payoff plays an active role in the maintenance of cooperation, which will only be warranted for the low and moderate values of loner's payoff. It thus indicates the effects of rationality and loner's payoff will influence the cooperation. Finally, we highlight the important result that the introduction of voluntary participation and punishment will facilitate cooperation greatly. 展开更多
关键词 public goods games magnitude of rationality voluntary participation PUNISHMENT
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Study on the Catalyst for Catalytic Cracking of Light Gasoline to Produce Propylene 被引量:1
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作者 Cao Zhitao Sun Chengjia 《China Petroleum Processing & Petrochemical Technology》 SCIE CAS 2010年第3期32-35,共4页
The catalytic cracking of a FCC gasoline fraction (IBP--75℃) provided by the refinery No. 2 of Fushun Petrochemical Company was carried out in a continuous fixed fluidized bed reaction apparatus in the laboratory, ... The catalytic cracking of a FCC gasoline fraction (IBP--75℃) provided by the refinery No. 2 of Fushun Petrochemical Company was carried out in a continuous fixed fluidized bed reaction apparatus in the laboratory, using the modified HZSM-5 as the catalyst. The effects of the reaction temperature and loading of lanthanum on the modified HZSM-5 catalyst on the FCC product distribution were investigated. The results showed that the yield of propylene was as high as 39.28% and the yield of aromatics reached 23.57% when the loading of La in the HZSM-5 catalyst was about 8%, when the reaction was carried under atmospheric pressure and at a reaction temperature of 500~550℃and a spatial velocity of 4.5 h^-1. The yield of aromatics dropped by 6.29% during catalytic cracking of gasoline in the presence of the zeolitic catalyst modified with 8% La. 展开更多
关键词 HZSM-5 La modification catalytic cracking PROPYLENE CARRIER
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Matter Loops Corrected Modified Gravity in Palatini Formulation
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作者 MENG Xin-He WANG Peng 《Communications in Theoretical Physics》 SCIE CAS CSCD 2008年第7期275-278,共4页
Recently,corrections to the standard Einstein Hilbert action were proposed to explain the current cosmicacceleration in stead of introducing dark energy.In the Palatini formulation of those modified gravity models,the... Recently,corrections to the standard Einstein Hilbert action were proposed to explain the current cosmicacceleration in stead of introducing dark energy.In the Palatini formulation of those modified gravity models,thereis an important observation due to Arkani Hamed:matter loops will give rise to a correction to the modified gravityaction proportional to the Ricci scalar of the metric.In the presence of such a term,we show that the current formsof modified gravity models in Palatini formulation,specifically,the 1/R gravity and in R gravity,will have phantoms.Then we study the possible instabilities due to the presence of phantom fields.We show that the strong instability inthe metric formulation of 1/R gravity indicated by Dolgov and Kawasaki will not appear and the decay timescales forthe phantom fields may be long enough for the theories to make sense as effective field theory.On the other hand,if wechange the sign of the modification terms to eliminate the phantoms,some other inconsistencies will arise for the variousversions of the modified gravity models.Finally,we comment on the universal property of the Palatini formulation ofthe matter loops corrected modified gravity models and its implications. 展开更多
关键词 modified gravity accelerated cosmic expansion loop correction and dark energy
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Technical issues and new devices of ESD of early gastric cancer 被引量:8
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作者 Wan Sik Lee Jin Woong Cho +2 位作者 Young Dae Kim Kyu Jong Kim Byung Ik Jang 《World Journal of Gastroenterology》 SCIE CAS CSCD 2011年第31期3585-3590,共6页
Endoscopic submucosal dissection(ESD) is a highly refined technique compared to conventional endoscopic mucosal resection.It enables complete resection of early gastric cancer(EGC) which has no possibility of lymph no... Endoscopic submucosal dissection(ESD) is a highly refined technique compared to conventional endoscopic mucosal resection.It enables complete resection of early gastric cancer(EGC) which has no possibility of lymph node metastasis.Indication for ESD of EGC generally entails early gastric cancer confined to the mucosa with well differentiated histology,though there are clinically suitable expanded criteria.As ESD requires specific skill and expertise,endoscopists need to be familiarized with basic methods and the use of special devices.The essence of the technique is to dissect the submucosal layer with direct vision and maintain thecutting plane above the underlying proper muscle layer.Although there are some differences in the detailed technical aspect,the cardinal method of ESD is now well established and standardized.Furthermore,research and development of new ESD devices that render more efficient,safe ESD are still in progress to improve the overall result of ESD on early gastric cancer. 展开更多
关键词 Endoscopic submucosal dissection TECHNIQUE DEVICE Early gastric cancer
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Barbed congruence of the asymmetric chi calculus
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作者 董笑菊 傅育熙 《Journal of Harbin Institute of Technology(New Series)》 EI CAS 2006年第4期444-451,共8页
The ehi calculus is a model of mobile processes. It has evolved from the pi-calculus with motivations from simplification aml communication-as-cut-eliminatinn. This paper studies the ehi calculus in the framework inco... The ehi calculus is a model of mobile processes. It has evolved from the pi-calculus with motivations from simplification aml communication-as-cut-eliminatinn. This paper studies the ehi calculus in the framework incorporating asymmetric communication. The major feature of the calculus is the identification of two actions: x/x and τ. The investigalion on the barbed bisimilarity shows how the property affects the observational theory. Based on the definition of the barbed bisimilarity, the simulation properties of the barbed bisimilarity are studied. It shows that the algebraic properties of the barbed bisimiilarity have changed greatly compared with the chi calculus.Although the definition of the barbed bisimilarity is very simple, the properly of closeness under contexts makes it difficuh to understand the barbed bisimilarity directly. Therefore an open style definition of the barbed bisimilarity is given, which is a context free description of barbed bisimilarity. Its definition is complex, but it is a well-behaved relation for it coincides with the barbed bisimilarity. It also helps to build an axiomatization system for the bathed congruence. Besides the axioms for the strong barbed bisimilarity, the paper proposes a new tau law and four new update laws for the barbed congruence. Both the operational and algebraic properties of the enriched calculus improve the understanding of the bisimulation behaviors of the model. 展开更多
关键词 mobile process BISIMULATION AXIOMATIZATION
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Simulation of MEG Packed Distillation Column Using an Equilibrium Stage Model-Case Study on Operating Parameters of Farsa Petrochemical Company: Assaluyeh-lran 被引量:1
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作者 Noorallh Kasiri YousefDorj 《Journal of Physical Science and Application》 2012年第10期434-440,共7页
Two types of equilibrium and non-equilibrium stage models are generally used to simulate the mass transfer of packed distillation column. Using non-equilibrium model requires the calculation of mass transfer coefficie... Two types of equilibrium and non-equilibrium stage models are generally used to simulate the mass transfer of packed distillation column. Using non-equilibrium model requires the calculation of mass transfer coefficients, thus, usually equilibrium-based methods are preferred to be used for simulations of distillation columns. In this paper, packed column distillation of production of Mono Ethylene Glycol in FARSA SHIMI Company (Assaluyeh-Iran)'s Ethylene Glycol portion has been simulated through using the equilibrium model and solving the related equations. The simulation has been carried out in the MATLAB environment. The column also has been simulated in the Aspen Hysys and Aspen Plus ver. 2006.5 environments. Then, the output has been compared with software results, designing and operating data of the underlying columns which demonstrate good consistency with the model. Having the model validated, the effect of some operating parameters has been analyzed through the model. 展开更多
关键词 DISTILLATION packed column modeling equilibrium and non-equilibrium models.
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Optimization of Safety Production Supervision Mode of Coalmining Enterprises 被引量:3
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作者 ZHOU Min XIAO Zhong-hai 《Journal of China University of Mining and Technology》 EI 2005年第4期348-353,共6页
In view of the fact that safety production supervision of coal mines in China features low efficacy, this paper applies principles of cybernetics to simulate the dynamic process of safety supervision, and proposes tha... In view of the fact that safety production supervision of coal mines in China features low efficacy, this paper applies principles of cybernetics to simulate the dynamic process of safety supervision, and proposes that institutional variables be controlled to support intermediate goals, which in turn contribute to the ultimate safety production objective. Rather than focusing all attention on safety issues of working faces, supervising departments of coalmines are advised to pay much more attention to institutional factors that may impact people’s attitude and behavior, which are responsible for most coalmine accidents. It is believed that such a shift of attention can effectively reduce coalmining production accidents and greatly enhance supervision efficacy. 展开更多
关键词 supervision mode control model supervision efficacy conducting mechanism
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