Transport analysis and impact evaluations are important input for decisions about infrastructure projects.The impacts on transport from fjord crossing tunnels or bridges are the foundation for the cost benefit analysi...Transport analysis and impact evaluations are important input for decisions about infrastructure projects.The impacts on transport from fjord crossing tunnels or bridges are the foundation for the cost benefit analysis,and also the basis for estimating the income from toll collection.Based on experiences from concept evaluations of several fixed link projects on E39,and an ongoing overall analysis,we question the results from transport analysis made by the official tools for such analysis:the RTM(regional transport model)which estimates the demand for trips below 10 km,the NTM(national transport model),for trips of 10 km or more,and the freight transport model.Both the NTM and the freight transport model are integrated in the RTM in the net assignment stage.We will demonstrate strengths and weaknesses in the transport models by showing contra intuitive or questionable results using the model as it is.The following questions arose as the initial results from the transport model were presented:Are the transport models able to capture immediate as well as long-term impacts?How would different assumptions about the monetary costs on these projects affect the forecasted demand and the cost benefit analysis?Are there other and wider ranges of impacts,if the analysis covers the total coastal highway as a whole,compared to evaluating impacts of each fixed link project individually?Do we have enough data to include transport effects of wider impacts of the fixed link projects?We had to deal with these questions in the concept evaluations carried out for the various fixed links project and in the current overall evaluation.We would like to suggest improvements in the analysis tools and emphasize requirements for knowledge about impacts of fixed links projects.展开更多
The term"student learning outcomes"refers to the knowledge, skills, and abilitiesthat students achieve during a course, and is typically assessed based on student evaluations conducted at the end of the seme...The term"student learning outcomes"refers to the knowledge, skills, and abilitiesthat students achieve during a course, and is typically assessed based on student evaluations conducted at the end of the semester. Previous studies in this area have investigated the effects of instructional quality and academic demands separately and have been limited primarily to examining findings using student samples fromthe United States. With Japanese college students' perceptions of self-improvementin English language courses as the dependent variable, the present study directly tests the hypothesis that students who perceive instructional quality to be higher, andcourse demands to be greater, also estimate higher levels of self-improvement in English language skills. The analysis provides strong support for this hypothesis.Higher ratings of instruction and academic demands have already beenshown to increase levels of student learning(Greimel-Fuhrmann and Geyer 2003;Nois and Hudson 2006; Mc Fadden and Dart 1992). The present study is the first toprovide direct evidence of the relative importance of student evaluations ofinstructional quality and academic demands as predictors of student learning and thefirst ever to do so with a sample of Japanese college students enrolled in a required English as a foreign language course. Our hypothesis is that Japanese students whoperceive instructional quality to be higher, and course demands to be greater,estimate higher levels of self-improvement in English language skills. Thus we test Japanese students' attitudes toward instructional quality and course demands asindependent variables predicting their perceptions of self-improvement in English language courses. The research focuses on Japanese students' improvement in English language skills because English education in Japan is an arena in which thedebate over limited English proficiency rages on, and because other research suggests reconsideration of English education in light of the demands of the rapidly expanding global era(Amaki 2008).展开更多
In this research article, we research on the contemporary career evaluation and the career planning theory based on tactical evaluations and simulation. As a result of the college expansion, the university students＇ ...In this research article, we research on the contemporary career evaluation and the career planning theory based on tactical evaluations and simulation. As a result of the college expansion, the university students＇ employment situation is very grim. There are many reasons for college student employment difficulty, one of which is not comprehensive, system of colleges and universities as the implementation of college students＇ career planning education effectively. In this from the meaning of career planning and the significance of implementing college students＇ career planning education in colleges and universities, describes the cross arm in the implementation of college career education and through the analysis of necessity of the implementation of the college students＇ career planning education in colleges and universities the problems existing in the combined tactical evaluations model gives a reasonable solution. As the conclusion, we propose the novel methodology with the potential applications and the prospect with more optimization orientation.展开更多
China＇s current academic evaluation system sees publications in core journals as a basic index to measure the academic qualification and quality of an academic institute,
The Flexible Global Ocean-Atmosphere-Land System model, Grid-point Version 2 （FGOALS-g2） for decadal predictions, is evaluated preliminarily, based on sets of ensemble 10-year hindcasts that it has produced. The res...The Flexible Global Ocean-Atmosphere-Land System model, Grid-point Version 2 （FGOALS-g2） for decadal predictions, is evaluated preliminarily, based on sets of ensemble 10-year hindcasts that it has produced. The results show that the hindcasts were more accurate in decadal variability of SST and surface air temperature （SAT）, particularly in that of Nifio3.4 SST and China regional SAT, than the second sample of the historical runs for 20th-century climate （the control） by the same model. Both the control and the hindcasts represented the global warming well using the same external forcings, but the control overestimated the warming. The hindcasts produced the warming closer to the observations. Performance of FGOALS-g2 in hindcasts benefits from more realistic initial conditions provided by the initialization run and a smaller model bias resulting from the use of a dynamic bias correction scheme newly developed in this study. The initialization consists of a 61-year nudging-based assimilation cycle, which follows on the control run on 01 January 1945 with the incorporation of observation data of upper-ocean temperature and salinity at each integration step in the ocean component model, the LASG IAP Climate System Ocean Model, Version 2 （LICOM2）. The dynamic bias correction is implemented at each step of LICOM2 during the hindcasts to reduce the systematic biases existing in upper-ocean temperature and salinity by incorporating multi-year monthly mean increments produced in the assimilation cycle. The effectiveness of the assimilation cycle and the role of the correction scheme were assessed prior to the hindcasts.展开更多
Based on linguistic evaluations, a linguistic threeway decision method is proposed. First, the alternatives are rated in linguistic forms and divided into acceptance, rejection and uncertainty regions. Secondly, the l...Based on linguistic evaluations, a linguistic threeway decision method is proposed. First, the alternatives are rated in linguistic forms and divided into acceptance, rejection and uncertainty regions. Secondly, the linguistic three-way group decision steps are provided. Specifically, the experts determine the lower bound and upper bound of the uncertainty region, respectively. When the evaluation is superior to the upper bound, the corresponding alternative is put into the acceptance region directly. Similarly, when the evaluation is inferior to the lower bound, the corresponding alternative is put into the rejection region directly, and the remaining alternatives are put into the uncertain region. Moreover, the objects in the uncertainty region are especially discussed. The linguistic terms are transformed into fuzzy numbers and then aggregated. Finally, a recommendation example is provided to illustrate the practicality and validity of the proposed method.展开更多
The Internet of Things (IoT) is a large-scale network of devices capable of sensing, data processing, and communicating with each other through different communication protocols. In today's technology ecosystem, I...The Internet of Things (IoT) is a large-scale network of devices capable of sensing, data processing, and communicating with each other through different communication protocols. In today's technology ecosystem, IoT interacts with many application areas such as smart city, smart building, security, traffic, remote monitoring, health, energy, disaster, agriculture, industry. The IoT network in these scenarios comprises tiny devices, gateways, and cloud platforms. An IoT network is able to keep these fundamental components in transmission under many conditions with lightweight communication protocols taking into account the limited hardware features (memory, processor, energy, etc.) of tiny devices. These lightweight communication protocols affect the network traffic, reliability, bandwidth, and energy consumption of the IoT application. Therefore, determining the most proper communication protocol for application developers emerges as an important engineering problem. This paper presents a straightforward overview of the lightweight communication protocols, technological advancements in application layer for the IoT ecosystem. The survey then analyzes various recent lightweight communication protocols and reviews their strengths and limitations. In addition, the paper explains the experimental comparison of Constrained Applications Protocol (CoAP), Message Queuing Telemetry (MQTT), and WebSocket protocols, more convenient for tiny IoT devices. Finally, we discuss future research directions of communication protocols for IoT.展开更多
The development of the activated cellular bony implant, in light of the principle on tissue engineering, has brought about a new era to the fields of dental maxillofacial implantation. The present study separated the ...The development of the activated cellular bony implant, in light of the principle on tissue engineering, has brought about a new era to the fields of dental maxillofacial implantation. The present study separated the osteoblast like cells from human alveolar bone and seeded them into 3 types of biodegradable scaffold to form the complexes and then evaluated their osteogenic activities in vitro, in order to acquire experimental data that are essential to future clinical practice of this new type of therapeutical procedure in oral and maxillofacial surgery. Material and methods: Human alveolar bone origin cells were separated from alveolar bone around the third impacted teeth of 3 patients by enzyme digestion and went on cultures with α MEM containing β glycerophosphate and Dexamethasone at 5% CO2 ,37℃ for 21 28 days. Confirmed osteoblasts like cells were then seeded onto 3 types of degradable biomaterials of polyglycolic acid scaffold, collagen sponge, and L lactic acid/ε caprolactone to form cell matrices complexes. The 3 types of complex were continued to culture for 21 28 days in vitro at the same conditions with the single layer cultured cells. The cell proliferation, morphological changes, ALPase activity and mineral nodules formation on scaffolds were measured and observed at 3 days intervals to evaluate the affinities & the osteogenic activities of the human alveolar osteoblast like cells in the 3 different complexes. Result and discussion: The results indicated that the cultured human alveolar bone origin cells from 3 patients could successfully express the osteoblasts phenotype in single layered culturing in vitro after stimulated by β glycerophosphate and Dexamethasone. It has been shown that the cultured osteoblast like cells seeded on PGAS matrix had the highest attachmental, proliferative and osteogenic activities, suggesting a good bio affinity between the human alveolar osteoblast like cells and the PGAS matrix. The statistical analysis (ANOVA) showed that there were significant differences between PGAS osteoblasts complex and CLGS or LACT complexes on osteogenic activities. (P<0.05). It was also noticed that cultured human alveolar osteoblasts seeded in biodegradable materials had a delayed peak period on cell proliferation and PLAase production ,suggesting the osteoblasts seeded on scaffolds need a period of time to adjust themselves before they can normally proliferate and expres their phenotypes. Conclusion: PGAS osteoblasts complex is worth to be further developed into a tissue engineered cellular artificial bony implant for reconstructing the oral maxillofacial bony defects in a more effective way in the future.展开更多
Since the establishment of geological surveys in Southern Africa a lots of geological information has been systematically stored.Due to the vast amounts of data generated one of the main functions of
Social network analysis(SNA) has been introduced to China's Mainland since the end of last century. It is often stated that SNA research has experienced rapid growth in China over these years, but few studies have...Social network analysis(SNA) has been introduced to China's Mainland since the end of last century. It is often stated that SNA research has experienced rapid growth in China over these years, but few studies have been conducted to prove the statement. This paper aims at exploring the research status and development of SNA in China by a critical assessment of journal articles. Our findings show that SNA is an evolving and diversified research area which has rich themes and topics, and can be applied to those studies on different levels, context and disciplines, and attract researchers and scholars from various fields and domains. In addition, the information community(Library & Information Science and Information Systems) plays a leading role in the SNA related researches. The paper also points out the research on SNA in China has some limitations, so it proposes several implications for the future development of SNA research from perspectives of information science.展开更多
Monte Carlo simulation of light propagation in turbid medium has been studied for years.A number of software packages have been developed to handle with such issue.However,it is hard to compare these simulation packag...Monte Carlo simulation of light propagation in turbid medium has been studied for years.A number of software packages have been developed to handle with such issue.However,it is hard to compare these simulation packages,especially for tissues with complex heterogeneous structures.Here,we first designed a group of mesh datasets generated by Iso2Mesh software,and used them to cross-validate the accuracy and to evaluate the performance of four Monte Carlo-based simulation packages,including Monte Carlo model of steady-state light transport in multi-layered tissues(MCML),tetrahedron-based inhomogeneous Monte Carlo optical simulator(TIMOS),Molecular Optical Simulation Environment(MOSE),and Mesh-based Monte Carlo(MMC).The performance of each package was evaluated based on the designed mesh datasets.The merits and demerits of each package were also discussed.Comparative results showed that the TIMOS package provided the best performance,which proved to be a reliable,efficient,and stable MC simulation package for users.展开更多
BACKGROUND Local mesenchymal stem cell(MSC)therapy for complex perianal fistulas(PFs)has shown considerable promise.But,the long-term safety and efficacy of MSC therapy in complex PFs remain unknown.AIM To explore the...BACKGROUND Local mesenchymal stem cell(MSC)therapy for complex perianal fistulas(PFs)has shown considerable promise.But,the long-term safety and efficacy of MSC therapy in complex PFs remain unknown.AIM To explore the long-term effectiveness and safety of local MSC therapy for complex PFs.METHODS Sources included the PubMed,EMBASE,and Cochrane Library databases.A standard meta-analysis was performed using RevMan 5.3.RESULTS After screening,6 studies met the inclusion criteria.MSC therapy was associated with an improved long-term healing rate(HR)compared with the control condition[odds ratio(OR)=2.13;95%confidence interval(95%CI):1.34 to 3.38;P=0.001].Compared with fibrin glue(FG)therapy alone,MSC plus FG therapy was associated with an improved long-term HR(OR=2.30;95%CI:1.21 to 4.36;P=0.01).When magnetic resonance imaging was used to evaluate fistula healing,MSC therapy was found to achieve a higher long-term HR than the control treatment(OR=2.79;95%CI:1.37 to 5.67;P=0.005).There were no significant differences in long-term safety(OR=0.77;95%CI:0.27 to 2.24;P=0.64).CONCLUSION Our study indicated that local MSC therapy promotes long-term and sustained healing of complex PFs and that this method is safe.展开更多
According to this problem that every regional technology innovation of SMEs and innovation environment are different, the method on secondary relative evaluation to measure the innovation capability of SMEs in 9 provi...According to this problem that every regional technology innovation of SMEs and innovation environment are different, the method on secondary relative evaluation to measure the innovation capability of SMEs in 9 provinces and 3 municipalities is developed in this paper. First the Fuzzy Integral Comprehensive Evaluation is adopted to measure the comprehensive index states of technological innovation of SMEs in different regions, and then the BCC model in Data Envelopment Analysis is used to calculate the secondary relative evaluation of regional technology innovation capability in SMEs, so that this method not only settles the relevance between indexes influencing regional technology innovation capability of SMEs, but also eliminates the influence of objective basic condition, and then provides bases for every region to make out policies and rules on technological innovation of SMEs and for enterprise to establish relevant strategy of technological innovation.展开更多
In recent years, high performance scientific computing under workstation cluster connected by local area network is becoming a hot point. Owing to both the longer latency and the higher overhead for protocol processin...In recent years, high performance scientific computing under workstation cluster connected by local area network is becoming a hot point. Owing to both the longer latency and the higher overhead for protocol processing compared with the powerful single workstation capacity, it is becoming severe important to keep balance not only for numerical load but also for communication load, and to overlap communications with computations while parallel computing. Hence,our efficiency evaluation rules must discover these capacities of a given parallel algorithm in order to optimize the existed algorithm to attain its highest parallel efficiency. The traditional efficiency evaluation rules can not succeed in this work any more. Fortunately, thanks to Culler's detail discuss in LogP model about interconnection networks for MPP systems, we present a system of efficiency evaluation rules for parallel computations under workstation cluster with PVM3.0 parallel software framework in this paper. These rules can satisfy above acquirements successfully. At last, two typical synchronous,and asynchronous applications are designed to verify the validity of these rules under 4 SGIs workstations cluster connected by Ethernet.展开更多
A ceramic gas turbine can save energy because of its high thermal efficiency at high turbine inlet temperatures. This paper deals with the thermodynamic and economic aspects of a ceramic gas turbine cogeneration syste...A ceramic gas turbine can save energy because of its high thermal efficiency at high turbine inlet temperatures. This paper deals with the thermodynamic and economic aspects of a ceramic gas turbine cogeneration system. Here cogeneration means the simultaneous production of electrical en-ergy and useful thermal energy from the same facility. The thermodynamic performance of a ceramic gas turbine cycle is assessed using a computer model. This model is used in parametric studies of performance under partial loads and at various inlet air temperatures. The computed performance is compared to the measured performance of a conventional gas turbine cycle. Then, an economic evaluation of a ceramic gas turbine cogeneration system is investigated. Energy savings provided by this system are estimated on the basis of the distributions of heat/power ratios. The computed economic evaluation is compared to the actual economic performance of a conventional system in which boilers produce the required thermal energy and electricity is purchased from a utility.展开更多
[ Objective] The research aimed to conduct objective evaluation on manner and effect of the artificial hail suppression operation in central Inner Mongolia. [ Method] Depending on analyses of the radar observation dat...[ Objective] The research aimed to conduct objective evaluation on manner and effect of the artificial hail suppression operation in central Inner Mongolia. [ Method] Depending on analyses of the radar observation data, hail shooting data and artificial hail suppression operation data in the middle region of Inner Mongolia （ represented by Huhhot） from 1990 to 2007, and combining capability of the artificial hail suppression operation tool （＂ 37＂ anti-aircraft gun）, nucleation rate of the catalyst and suitable catalyst volume in hail cloud per unit volume, objective evaluation of the manner and effect for artificial hail suppression operation in the area was obtained. [ Result] It was exacter to distinguish shape and intensity of the hail cloud, but it was uncertain to distinguish height of the hail cloud, when selecting operation target cloud. Operation height was still lower, and perfect seeding height couldn＇t be attained. Operation occasion was controlled well, but there still were phenomena of the late operation. Shell amounts of the operation were few obviously, needing to increase shell amount or to improve nucleation rate of the catalyst. [ Conclsion] Syntheti- cally, manner of the artificial hail suppression operation in central Inner Mongolia was suitable, and total efficiency was about 85%.展开更多
Introduction: With the introduction of a new curriculum “Modellstudiengang Medizin” in Aachen, the education in medical psychology was also restructured. This paper presents data from the students’ evaluations of t...Introduction: With the introduction of a new curriculum “Modellstudiengang Medizin” in Aachen, the education in medical psychology was also restructured. This paper presents data from the students’ evaluations of the Basic Course in Medical Psychology and the new teaching format “Systemblock Psyche” over a three-year time span. Method: All students were asked to evaluate the courses anonymously online. Effect sizes [1] were calculated to compare acceptance of the different course types and also changes across time. Results: Both the Basic Course in Medical Psychology and the Systemblock Psyche were rated as “good” to “satisfactory” and were in their overall acceptance comparable to other courses and system blocks. Continuous improvement in acceptance was found for the Basic Course (d = 0.30 - 0.57). The Systemblock Psyche received varying evaluations but achieved higher scores on comprehensibility (d = 0.20) and communication among teachers (d = 0.34) than other system blocks. On the other hand, students rated the education in medical psychology as less relevant than other courses (d = 0.28 and 0.77, respectively). Conclusion: Overall, the acceptance rating was satisfactory and comparable to other evaluation studies conducted in earlier curricula. However, ratings of the relevance of the courses in medical psychology were disappointing and indicate the difficulty of teaching a biopsychosocial model to medical students.展开更多
Image generation models have made remarkable progress,and image evaluation is crucial for explaining and driving the development of these models.Previous studies have extensively explored human and automatic evaluatio...Image generation models have made remarkable progress,and image evaluation is crucial for explaining and driving the development of these models.Previous studies have extensively explored human and automatic evaluations of image generation.Herein,these studies are comprehensively surveyed,specifically for two main parts:evaluation protocols and evaluation methods.First,10 image generation tasks are summarized with focus on their differences in evaluation aspects.Based on this,a novel protocol is proposed to cover human and automatic evaluation aspects required for various image generation tasks.Second,the review of automatic evaluation methods in the past five years is highlighted.To our knowledge,this paper presents the first comprehensive summary of human evaluation,encompassing evaluation methods,tools,details,and data analysis methods.Finally,the challenges and potential directions for image generation evaluation are discussed.We hope that this survey will help researchers develop a systematic understanding of image generation evaluation,stay updated with the latest advancements in the field,and encourage further research.展开更多
文摘Transport analysis and impact evaluations are important input for decisions about infrastructure projects.The impacts on transport from fjord crossing tunnels or bridges are the foundation for the cost benefit analysis,and also the basis for estimating the income from toll collection.Based on experiences from concept evaluations of several fixed link projects on E39,and an ongoing overall analysis,we question the results from transport analysis made by the official tools for such analysis:the RTM(regional transport model)which estimates the demand for trips below 10 km,the NTM(national transport model),for trips of 10 km or more,and the freight transport model.Both the NTM and the freight transport model are integrated in the RTM in the net assignment stage.We will demonstrate strengths and weaknesses in the transport models by showing contra intuitive or questionable results using the model as it is.The following questions arose as the initial results from the transport model were presented:Are the transport models able to capture immediate as well as long-term impacts?How would different assumptions about the monetary costs on these projects affect the forecasted demand and the cost benefit analysis?Are there other and wider ranges of impacts,if the analysis covers the total coastal highway as a whole,compared to evaluating impacts of each fixed link project individually?Do we have enough data to include transport effects of wider impacts of the fixed link projects?We had to deal with these questions in the concept evaluations carried out for the various fixed links project and in the current overall evaluation.We would like to suggest improvements in the analysis tools and emphasize requirements for knowledge about impacts of fixed links projects.
文摘The term"student learning outcomes"refers to the knowledge, skills, and abilitiesthat students achieve during a course, and is typically assessed based on student evaluations conducted at the end of the semester. Previous studies in this area have investigated the effects of instructional quality and academic demands separately and have been limited primarily to examining findings using student samples fromthe United States. With Japanese college students' perceptions of self-improvementin English language courses as the dependent variable, the present study directly tests the hypothesis that students who perceive instructional quality to be higher, andcourse demands to be greater, also estimate higher levels of self-improvement in English language skills. The analysis provides strong support for this hypothesis.Higher ratings of instruction and academic demands have already beenshown to increase levels of student learning(Greimel-Fuhrmann and Geyer 2003;Nois and Hudson 2006; Mc Fadden and Dart 1992). The present study is the first toprovide direct evidence of the relative importance of student evaluations ofinstructional quality and academic demands as predictors of student learning and thefirst ever to do so with a sample of Japanese college students enrolled in a required English as a foreign language course. Our hypothesis is that Japanese students whoperceive instructional quality to be higher, and course demands to be greater,estimate higher levels of self-improvement in English language skills. Thus we test Japanese students' attitudes toward instructional quality and course demands asindependent variables predicting their perceptions of self-improvement in English language courses. The research focuses on Japanese students' improvement in English language skills because English education in Japan is an arena in which thedebate over limited English proficiency rages on, and because other research suggests reconsideration of English education in light of the demands of the rapidly expanding global era(Amaki 2008).
文摘In this research article, we research on the contemporary career evaluation and the career planning theory based on tactical evaluations and simulation. As a result of the college expansion, the university students＇ employment situation is very grim. There are many reasons for college student employment difficulty, one of which is not comprehensive, system of colleges and universities as the implementation of college students＇ career planning education effectively. In this from the meaning of career planning and the significance of implementing college students＇ career planning education in colleges and universities, describes the cross arm in the implementation of college career education and through the analysis of necessity of the implementation of the college students＇ career planning education in colleges and universities the problems existing in the combined tactical evaluations model gives a reasonable solution. As the conclusion, we propose the novel methodology with the potential applications and the prospect with more optimization orientation.
文摘China＇s current academic evaluation system sees publications in core journals as a basic index to measure the academic qualification and quality of an academic institute,
基金the Ministry of Science and Technology of China for the National High-tech R&D Program(863 Program:Grant No.2010AA012304)the National Basic Research Program of China(973 Program:Grant No.2011CB309704)
文摘The Flexible Global Ocean-Atmosphere-Land System model, Grid-point Version 2 （FGOALS-g2） for decadal predictions, is evaluated preliminarily, based on sets of ensemble 10-year hindcasts that it has produced. The results show that the hindcasts were more accurate in decadal variability of SST and surface air temperature （SAT）, particularly in that of Nifio3.4 SST and China regional SAT, than the second sample of the historical runs for 20th-century climate （the control） by the same model. Both the control and the hindcasts represented the global warming well using the same external forcings, but the control overestimated the warming. The hindcasts produced the warming closer to the observations. Performance of FGOALS-g2 in hindcasts benefits from more realistic initial conditions provided by the initialization run and a smaller model bias resulting from the use of a dynamic bias correction scheme newly developed in this study. The initialization consists of a 61-year nudging-based assimilation cycle, which follows on the control run on 01 January 1945 with the incorporation of observation data of upper-ocean temperature and salinity at each integration step in the ocean component model, the LASG IAP Climate System Ocean Model, Version 2 （LICOM2）. The dynamic bias correction is implemented at each step of LICOM2 during the hindcasts to reduce the systematic biases existing in upper-ocean temperature and salinity by incorporating multi-year monthly mean increments produced in the assimilation cycle. The effectiveness of the assimilation cycle and the role of the correction scheme were assessed prior to the hindcasts.
基金The National Natural Science Foundation of China(No.71171048,71371049)the Scientific Innovation Research of College Graduates in Jiangsu Province(No.KYLX15-0190)the Scientific Research Foundation of Graduate School of Southeast University(No.YBJJ1567)
文摘Based on linguistic evaluations, a linguistic threeway decision method is proposed. First, the alternatives are rated in linguistic forms and divided into acceptance, rejection and uncertainty regions. Secondly, the linguistic three-way group decision steps are provided. Specifically, the experts determine the lower bound and upper bound of the uncertainty region, respectively. When the evaluation is superior to the upper bound, the corresponding alternative is put into the acceptance region directly. Similarly, when the evaluation is inferior to the lower bound, the corresponding alternative is put into the rejection region directly, and the remaining alternatives are put into the uncertain region. Moreover, the objects in the uncertainty region are especially discussed. The linguistic terms are transformed into fuzzy numbers and then aggregated. Finally, a recommendation example is provided to illustrate the practicality and validity of the proposed method.
文摘The Internet of Things (IoT) is a large-scale network of devices capable of sensing, data processing, and communicating with each other through different communication protocols. In today's technology ecosystem, IoT interacts with many application areas such as smart city, smart building, security, traffic, remote monitoring, health, energy, disaster, agriculture, industry. The IoT network in these scenarios comprises tiny devices, gateways, and cloud platforms. An IoT network is able to keep these fundamental components in transmission under many conditions with lightweight communication protocols taking into account the limited hardware features (memory, processor, energy, etc.) of tiny devices. These lightweight communication protocols affect the network traffic, reliability, bandwidth, and energy consumption of the IoT application. Therefore, determining the most proper communication protocol for application developers emerges as an important engineering problem. This paper presents a straightforward overview of the lightweight communication protocols, technological advancements in application layer for the IoT ecosystem. The survey then analyzes various recent lightweight communication protocols and reviews their strengths and limitations. In addition, the paper explains the experimental comparison of Constrained Applications Protocol (CoAP), Message Queuing Telemetry (MQTT), and WebSocket protocols, more convenient for tiny IoT devices. Finally, we discuss future research directions of communication protocols for IoT.
文摘The development of the activated cellular bony implant, in light of the principle on tissue engineering, has brought about a new era to the fields of dental maxillofacial implantation. The present study separated the osteoblast like cells from human alveolar bone and seeded them into 3 types of biodegradable scaffold to form the complexes and then evaluated their osteogenic activities in vitro, in order to acquire experimental data that are essential to future clinical practice of this new type of therapeutical procedure in oral and maxillofacial surgery. Material and methods: Human alveolar bone origin cells were separated from alveolar bone around the third impacted teeth of 3 patients by enzyme digestion and went on cultures with α MEM containing β glycerophosphate and Dexamethasone at 5% CO2 ,37℃ for 21 28 days. Confirmed osteoblasts like cells were then seeded onto 3 types of degradable biomaterials of polyglycolic acid scaffold, collagen sponge, and L lactic acid/ε caprolactone to form cell matrices complexes. The 3 types of complex were continued to culture for 21 28 days in vitro at the same conditions with the single layer cultured cells. The cell proliferation, morphological changes, ALPase activity and mineral nodules formation on scaffolds were measured and observed at 3 days intervals to evaluate the affinities & the osteogenic activities of the human alveolar osteoblast like cells in the 3 different complexes. Result and discussion: The results indicated that the cultured human alveolar bone origin cells from 3 patients could successfully express the osteoblasts phenotype in single layered culturing in vitro after stimulated by β glycerophosphate and Dexamethasone. It has been shown that the cultured osteoblast like cells seeded on PGAS matrix had the highest attachmental, proliferative and osteogenic activities, suggesting a good bio affinity between the human alveolar osteoblast like cells and the PGAS matrix. The statistical analysis (ANOVA) showed that there were significant differences between PGAS osteoblasts complex and CLGS or LACT complexes on osteogenic activities. (P<0.05). It was also noticed that cultured human alveolar osteoblasts seeded in biodegradable materials had a delayed peak period on cell proliferation and PLAase production ,suggesting the osteoblasts seeded on scaffolds need a period of time to adjust themselves before they can normally proliferate and expres their phenotypes. Conclusion: PGAS osteoblasts complex is worth to be further developed into a tissue engineered cellular artificial bony implant for reconstructing the oral maxillofacial bony defects in a more effective way in the future.
文摘Since the establishment of geological surveys in Southern Africa a lots of geological information has been systematically stored.Due to the vast amounts of data generated one of the main functions of
基金jointly supported by the National Social Science Foundation in China(Grand No.10ATQ004)Ministry of Education,Humanities and Social Sciences Council in China(Grand No.09YJA870014)
文摘Social network analysis(SNA) has been introduced to China's Mainland since the end of last century. It is often stated that SNA research has experienced rapid growth in China over these years, but few studies have been conducted to prove the statement. This paper aims at exploring the research status and development of SNA in China by a critical assessment of journal articles. Our findings show that SNA is an evolving and diversified research area which has rich themes and topics, and can be applied to those studies on different levels, context and disciplines, and attract researchers and scholars from various fields and domains. In addition, the information community(Library & Information Science and Information Systems) plays a leading role in the SNA related researches. The paper also points out the research on SNA in China has some limitations, so it proposes several implications for the future development of SNA research from perspectives of information science.
基金supported by the National Natural Science Foundation of China under Grant Nos.81571725 and 81230033.
文摘Monte Carlo simulation of light propagation in turbid medium has been studied for years.A number of software packages have been developed to handle with such issue.However,it is hard to compare these simulation packages,especially for tissues with complex heterogeneous structures.Here,we first designed a group of mesh datasets generated by Iso2Mesh software,and used them to cross-validate the accuracy and to evaluate the performance of four Monte Carlo-based simulation packages,including Monte Carlo model of steady-state light transport in multi-layered tissues(MCML),tetrahedron-based inhomogeneous Monte Carlo optical simulator(TIMOS),Molecular Optical Simulation Environment(MOSE),and Mesh-based Monte Carlo(MMC).The performance of each package was evaluated based on the designed mesh datasets.The merits and demerits of each package were also discussed.Comparative results showed that the TIMOS package provided the best performance,which proved to be a reliable,efficient,and stable MC simulation package for users.
文摘BACKGROUND Local mesenchymal stem cell(MSC)therapy for complex perianal fistulas(PFs)has shown considerable promise.But,the long-term safety and efficacy of MSC therapy in complex PFs remain unknown.AIM To explore the long-term effectiveness and safety of local MSC therapy for complex PFs.METHODS Sources included the PubMed,EMBASE,and Cochrane Library databases.A standard meta-analysis was performed using RevMan 5.3.RESULTS After screening,6 studies met the inclusion criteria.MSC therapy was associated with an improved long-term healing rate(HR)compared with the control condition[odds ratio(OR)=2.13;95%confidence interval(95%CI):1.34 to 3.38;P=0.001].Compared with fibrin glue(FG)therapy alone,MSC plus FG therapy was associated with an improved long-term HR(OR=2.30;95%CI:1.21 to 4.36;P=0.01).When magnetic resonance imaging was used to evaluate fistula healing,MSC therapy was found to achieve a higher long-term HR than the control treatment(OR=2.79;95%CI:1.37 to 5.67;P=0.005).There were no significant differences in long-term safety(OR=0.77;95%CI:0.27 to 2.24;P=0.64).CONCLUSION Our study indicated that local MSC therapy promotes long-term and sustained healing of complex PFs and that this method is safe.
文摘According to this problem that every regional technology innovation of SMEs and innovation environment are different, the method on secondary relative evaluation to measure the innovation capability of SMEs in 9 provinces and 3 municipalities is developed in this paper. First the Fuzzy Integral Comprehensive Evaluation is adopted to measure the comprehensive index states of technological innovation of SMEs in different regions, and then the BCC model in Data Envelopment Analysis is used to calculate the secondary relative evaluation of regional technology innovation capability in SMEs, so that this method not only settles the relevance between indexes influencing regional technology innovation capability of SMEs, but also eliminates the influence of objective basic condition, and then provides bases for every region to make out policies and rules on technological innovation of SMEs and for enterprise to establish relevant strategy of technological innovation.
文摘In recent years, high performance scientific computing under workstation cluster connected by local area network is becoming a hot point. Owing to both the longer latency and the higher overhead for protocol processing compared with the powerful single workstation capacity, it is becoming severe important to keep balance not only for numerical load but also for communication load, and to overlap communications with computations while parallel computing. Hence,our efficiency evaluation rules must discover these capacities of a given parallel algorithm in order to optimize the existed algorithm to attain its highest parallel efficiency. The traditional efficiency evaluation rules can not succeed in this work any more. Fortunately, thanks to Culler's detail discuss in LogP model about interconnection networks for MPP systems, we present a system of efficiency evaluation rules for parallel computations under workstation cluster with PVM3.0 parallel software framework in this paper. These rules can satisfy above acquirements successfully. At last, two typical synchronous,and asynchronous applications are designed to verify the validity of these rules under 4 SGIs workstations cluster connected by Ethernet.
文摘A ceramic gas turbine can save energy because of its high thermal efficiency at high turbine inlet temperatures. This paper deals with the thermodynamic and economic aspects of a ceramic gas turbine cogeneration system. Here cogeneration means the simultaneous production of electrical en-ergy and useful thermal energy from the same facility. The thermodynamic performance of a ceramic gas turbine cycle is assessed using a computer model. This model is used in parametric studies of performance under partial loads and at various inlet air temperatures. The computed performance is compared to the measured performance of a conventional gas turbine cycle. Then, an economic evaluation of a ceramic gas turbine cogeneration system is investigated. Energy savings provided by this system are estimated on the basis of the distributions of heat/power ratios. The computed economic evaluation is compared to the actual economic performance of a conventional system in which boilers produce the required thermal energy and electricity is purchased from a utility.
基金Supported by Science and Technology Innovation Item of Inner Mongolia Weather Bureau(nmqxkjcx200811)
文摘[ Objective] The research aimed to conduct objective evaluation on manner and effect of the artificial hail suppression operation in central Inner Mongolia. [ Method] Depending on analyses of the radar observation data, hail shooting data and artificial hail suppression operation data in the middle region of Inner Mongolia （ represented by Huhhot） from 1990 to 2007, and combining capability of the artificial hail suppression operation tool （＂ 37＂ anti-aircraft gun）, nucleation rate of the catalyst and suitable catalyst volume in hail cloud per unit volume, objective evaluation of the manner and effect for artificial hail suppression operation in the area was obtained. [ Result] It was exacter to distinguish shape and intensity of the hail cloud, but it was uncertain to distinguish height of the hail cloud, when selecting operation target cloud. Operation height was still lower, and perfect seeding height couldn＇t be attained. Operation occasion was controlled well, but there still were phenomena of the late operation. Shell amounts of the operation were few obviously, needing to increase shell amount or to improve nucleation rate of the catalyst. [ Conclsion] Syntheti- cally, manner of the artificial hail suppression operation in central Inner Mongolia was suitable, and total efficiency was about 85%.
文摘Introduction: With the introduction of a new curriculum “Modellstudiengang Medizin” in Aachen, the education in medical psychology was also restructured. This paper presents data from the students’ evaluations of the Basic Course in Medical Psychology and the new teaching format “Systemblock Psyche” over a three-year time span. Method: All students were asked to evaluate the courses anonymously online. Effect sizes [1] were calculated to compare acceptance of the different course types and also changes across time. Results: Both the Basic Course in Medical Psychology and the Systemblock Psyche were rated as “good” to “satisfactory” and were in their overall acceptance comparable to other courses and system blocks. Continuous improvement in acceptance was found for the Basic Course (d = 0.30 - 0.57). The Systemblock Psyche received varying evaluations but achieved higher scores on comprehensibility (d = 0.20) and communication among teachers (d = 0.34) than other system blocks. On the other hand, students rated the education in medical psychology as less relevant than other courses (d = 0.28 and 0.77, respectively). Conclusion: Overall, the acceptance rating was satisfactory and comparable to other evaluation studies conducted in earlier curricula. However, ratings of the relevance of the courses in medical psychology were disappointing and indicate the difficulty of teaching a biopsychosocial model to medical students.
基金supported by the National Natural Science Foundation of China(No.62006208)the Provincial Key Research and Development Plan of Zhejiang Province(No.2024C01250(SD2))。
文摘Image generation models have made remarkable progress,and image evaluation is crucial for explaining and driving the development of these models.Previous studies have extensively explored human and automatic evaluations of image generation.Herein,these studies are comprehensively surveyed,specifically for two main parts:evaluation protocols and evaluation methods.First,10 image generation tasks are summarized with focus on their differences in evaluation aspects.Based on this,a novel protocol is proposed to cover human and automatic evaluation aspects required for various image generation tasks.Second,the review of automatic evaluation methods in the past five years is highlighted.To our knowledge,this paper presents the first comprehensive summary of human evaluation,encompassing evaluation methods,tools,details,and data analysis methods.Finally,the challenges and potential directions for image generation evaluation are discussed.We hope that this survey will help researchers develop a systematic understanding of image generation evaluation,stay updated with the latest advancements in the field,and encourage further research.
