从录取分数、学费看玉溪农职院计科系的定位及对策

针对玉溪农业职业技术学院计科系目前发展中存在的问题,统计2008、2009、2010年云南省开设计算机类高职专业的公办院校、专业群的录取最高平均分、最低平均分及差值和2010年的学费,通过教育统计分组,参照认知价值定价法,计算出云南省各类开设计算机高职专业的公办院校、专业群的分组、定位,分析了影响玉溪农业职业技术学院计算机类专业生存、发展的根本因素,并提出了解决的对策。

山西大学本科生借阅情况的统计与思考

山西大学本科生借阅情况的统计与思考李嘉琳张晓颖（山西大学图书馆太原０３０００６）我馆于１９９５年５月开通了计算机流通系统，这一系统的使用，使我们得以方便地对读者的借阅情况进行较为全面系统的统计与分析，从而可以深入地掌握他们的借阅需求和特点及借阅规律，...

Programming for scientific computing on peta-scale heterogeneous parallel systems

Peta-scale high-perfomlance computing systems are increasingly built with heterogeneous CPU and GPU nodes to achieve higher power efficiency and computation throughput. While providing unprecedented capabilities to conduct computational experiments of historic significance, these systems are presently difficult to program. The users, who are domain experts rather than computer experts, prefer to use programming models closer to their domains （e.g., physics and biology） rather than MPI and OpenME This has led the development of domain-specific programming that provides domain-specific programming interfaces but abstracts away some performance-critical architecture details. Based on experience in designing large-scale computing systems, a hybrid programming framework for scientific computing on heterogeneous architectures is proposed in this work. Its design philosophy is to provide a collaborative mechanism for domain experts and computer experts so that both domain-specific knowledge and performance-critical architecture details can be adequately exploited. Two real-world scientific applications have been evaluated on TH-IA, a peta-scale CPU-GPU heterogeneous system that is currently the 5th fastest supercomputer in the world. The experimental results show that the proposed framework is well suited for developing large-scale scientific computing applications on peta-scale heterogeneous CPU/GPU systems.

Bibliometric analysis of international polar research progress

Based on the WoS and CNKI databases,this paper provides statistical analysis of Chinese and international polar research from 2013-2018 in terms of the number of publications,citations,institutions,disciplinary distribution,collaborations,source journals,and highly cited papers by bibliometric methods.Combining the differences of the traditional disciplinary advantages and natural geographical locations of China and the West,the current research hotspots in the polar field are summarized.(1)"Polar ice cap instability and sea level change","sensitivity and vulnerability of polar ecosystems","Arctic sea-ice-air interactions and climate effects"are the focus of research in the world.(2)Political environment research such as"National Strategy and Cooperation under the'Silk Road on Ice'Initiative"has become a unique polar strategic topic in China.At the same time,insights and suggestions are put forward from three aspects,such as increasing policy support,building cooperation system and optimizing strategic layout.

Pre-treatment verification of intensity-modulated radiation therapy in paediatric patients: adequate estimation for tolerance limits

Objective: The objective of this work was to establish adequate tolerance limits based on a certain defined institutional indices and generate published data presenting our results to the radiotherapy community. Methods: One hundred paediatric patients were treated using 6-MV X-ray beams produced by Siemens ONCOR Expression linear accelerator. The clinical step-and-shoot intensity-modulated radiation therapy (IMRT) treatment plans were designed using KonRad release 2.2.23. For two treatment sites (abdomen, head and neck), the fluence maps generated by the treatment planning system were all delivered for the quality assurance (QA) which included absolute dose verification for all treatment fields, relative dose verification for each treatment field. Results: The 724 fluence maps were analyzed at three different criteria using the gamma index tool. The 3% dose difference of local prescribed dose /3 mm was considered adequate. The passing rate for all fields of all plans always exceeded 70%. The dose differences between the measured and calculated doses ranged from -2.2% to +4% [mean and standard deviation (s): 1.4 ± 1.5] for the abdominal case, and from -3.3% to +5.6% (1.3 ± 1.6) for head and neck case with total confidence limit 0.046 (4.6%). The 14/100 (14%) of the absolute point dose measurements were out of ±3% from the dose predicted by the treatment planning system. Only two cases were below -3%, while 12 cases over +3%. Conclusion: At 3% dose difference of local prescribed dose /3 mm criteria, a 75% passing a gamma criterion and 3% for absolute point dose can be achieved for abdomen and head and neck treatments site. We considered the tolerance limits based on these indices for IMRT QA adequate.

Toward Exhaustive Teaching of Relational Database Indexes

There are several indexing techniques that can optimize system performances. The choice of the right index type in a schema can improve the DB performances by up to 80%. Unfortunately the illustrations of the various techniques are scattered over a number of texts and manuals, and the courses for database designers are often somewhat incomplete. The present paper shows a didactical experience which tackles this kind of limitations. In particular, the authors have prepared a textbook that includes twenty-one different index formats; it discusses advantages and disadvantages of each indexing technique, and has been positively validated during advanced courses on relational database design.

Differences inthe Level of Social Status of Male and Female Folk Dancers

The research was conducted in order to determine differences in the social status structure of male and female performers of folk dances. For the purpose of determining the social status structure of male and female dancers, 103 male and 145 female dancers aged 18-28 actively engaged in folk dancing were tested. For the assessment of social status, only one model that allows for true scientific approach to studying the structure of stratification dimensions has been made so far. The model was constructed by Saksida and later served as a basis for many studies conducted by other authors as well （Saksida, Caserman, Petrovic, Momirovic, and Hosek）. Designed as a phenomenological model, it has undergone several changes over time, but it is still suitable for studying social change. The INST2 questionnaire modified by Boli, Popovic, Hosek, Momirovic, and Savic （SSMIN） was applied in this study. All the data obtained in this research were processed at the Multidisciplinary Research Center of the Faculty of Sport and Physical Education, University of Pristina, through the system of data processing programs designed by D. Popovic and K Momirovic. To determine differences between the groups, a method of discriminant analysis was applied.

Review and Prospective on Systems Engineering in China

The origin,formation and evolution of the systems engineering theory accompanied QIAN Xuesen's whole life.The systems engineering theory is the concentrated reflection of QIAN's achievements and theory in all aspects.From returning to China to pioneer China's space industry,creating a new management mode of "one overall design department,two command lines",publishing Organization and Management Technology:Systems Engineering,to proposing the theory of Open Complex Giant System(OCGS) and the theory of Metasynthetic Wisdom,all these mark the formation of the Chinese school of systems engineering.Guided by QIAN's academic ideas,various major Chinese space programs have been implemented successfully which verified the fact that the systems engineering is scientific.The systems engineering has been applied to different fields of the national economy and has a development process with the distinguished characteristics of Chinese systems science.On one hand,the systems engineering is put forward deeply along the traditional systems engineering thought and theory;on the other hand,a batch of innovations that break the traditional shackles have occurred,making the Chinese systems engineering unique and outstanding compared with foreign counterparts.

Simultaneous integrated boost IMRT in pediatric:evaluation for two commercial treatment planning systems

Objective： The aim of the work was to compare the dosimetric results that were obtained by using two treatment planning systems （TPS） Siemens KonRad version 2.2.23, Elekta XiO version 4.4 to perform a simultaneous integrated boost （SIB） for head and neck and central nervous system （CNS） cases in paediatric patients. Methods： The CT scan data for five paediatric patients, with head and neck and CNS tumors, were transferred into both of the TPSs. Clinical step-and-shoot intensity-modulated radiotherapy （IMRT） treatment plans were designed using 6 MV photon beam for delivery on a Siemens Oncor Accelerator with multileaf collimator MLC （82 leaf）. Plans were optimized to achieve the same clinical objectives using the same beam energy, number and direction of beams. The analysis was based on isodose distributions, the dose volume histogram （DVH） for planning target volume （PTV） and the relevant organs at risk （OARs） as well as volume receiving 2 Gy and 5 Gy, also total number of segments, MU/segment, and the number of MU/cGy had been investigated. Treatment delivery time and conformation number were two other parameters in this study. Results： The segmentation using KonRad was more efficient, resulting in fewer segments （reduction between 13.2% and 48.3%）, fewer M Us （reduction between 10.7% and 33%） and that reflected on treatment delivery times to be shorter by up to 8 rain or 46%. In most of the cases KonRad had the highest volume receiving in excess of 2 and 5 Gy, and XiO showed the lowest. Also KonRad achieved slightly better conformality （0.76 ± 0.054） than XiO （0.73 ± 0.05） while XiO presented a higher modulation factor value （3.3 MU/cGy） than KonRad （2.4 MU/cGy）. Conclusion： The KonRad treatment planning system was found to be superior to the XiO treatment planning system. This is true for the possible increase of radiation-induced secondary malignancies as well as for the local control.

Public Key Cryptosystem Based on Two Sided Action of Different Exotic Semirings

The idempotent semirings Rmax and Rmin play a crucial role in several areas of mathematics and their applications such as discrete mathematics, algebraic geometry, computer science, computer languages, linguistic problems, optimization theory, discrete event systems, fuzzy logics. In this paper we consider the expansion of the semirings Rmax and Rmin with residuals and describe how to use these expended semirings in public key cryptography.

The construction of technical standard system for ultra deep and high sour gas fields in Northeast Sichuan

To deal with the exploitation difficulties of gas fields in Northeast Sichuan with deep marine strata, after researching the relative standards domestic and abroad extensively, summarizing and promoting the successful experiences and failure lessons of project construction technology application scientifically, Sinopec has established an integrated technical standard system for the exploration and development of ultra deep and high sour gas fields. The system consists of 51 enterprise standards and covers 7 professions including geophysical prospecting, drilling, drilling log, well logging, gas formation test and production, sour gas gathering and transferring system, and HSE (health,safety,environment). It guides and guarantees the safe, high-quality and high-efficiency project construction effectively by means of enhancing the engineering design criterion, recommending the data processing and interpretation methods, identifying the requirements of operation and field inspection and standardizing the application of technical equipments.

Discussion on the Application of Complex Power Network to Software Engineering

Along with the further development of science and technology, computer hardware and the Intemet are in a rapid development, and information technology has been widely used in all fields so that complex problems are simply solved. Because of the needs for the development, software starts to mutually integrate with complex power network, making the scale of software increase greatly. Such a growing trend of software promotes soft-ware development to go beyond a general understanding and control and thus a complex system is formed. It is necessary to strengthen the research of complex network theory, and this is a new way to help people study the complexity of software systems. In this paper, the development course of complex dynamic network is introduced simply and the use of complex power network in the software engineering is summarized. Hopefully, this paper can help the crossover study of complex power network and software engineering in the future.

Application of computer technology in fruit science

This paper summarized the application of computer technology in fruit science, including crop modelling, expert system, decision support system (DSS), computer vision (CV), the Internet, 3 “S”technology, etc. The existing problems and prospects are also discussed in the paper.

肯尼士球迷论坛

肯尼士球迷论坛我是贵刊的一名忠实读者，我认为《网球天地》是一本办得很出色的刊物。主要体现在专业与业余的“度”上把握得恰到好处，无论是专业球员或业余爱好者都能在《网球天地》上找到适合自己的文章。我希望贵刊实现月刊出版，以弥补时效性之不足。衷心希望《网球...

Multidiscipline collaborative optimization of differential steering system of electric vehicle with motorized wheels

Based on the multidiscipline design optimization theory, a multidiscipline collaborative optimization model of the differential steering system of electric vehicle with motorized wheels is built, with the steering economy as the main system and the steering road feel, the steering flexibility and the mechanic character of the steering sensors as the subsystems. Considering the coupled relationship of each discipline, the main system is optimized by the multi-island algorithm and the subsystems are optimized by the sequential quadratic programming algorithm. The simulation results show that the steering economy can be optimized by the collaborative optimization, and that the system can get good steering road feel, good steering flexibility and good mechanic character of the steering sensors.

A Connectome Computation System for discovery science of brain

Much like genomics, brain connectomics has rapidly become a core component of most national brain projects around the world. Beyond the ambitious aims of these projects, a fundamental challenge is the need for an efficient, robust, reliable and easy-to-use pipeline to mine such large neuroscience datasets. Here, we introduce a computational pipeline--namely the Connectome Compu- tation System （CCS）-for discovery science of human brain connectomes at the macroscale with multimodal magnetic resonance imaging technologies. The CCS is designed with a three-level hierarchical structure that includes data cleaning and preprocessing, individual connectome mapping andconnectome mining, and knowledge discovery. Several functional modules are embedded into this hierarchy to implement quality control procedures, reliability analysis and connectome visualization. We demonstrate the utility of the CCS based upon a publicly available dataset, the NKI- Rockland Sample, to delineate the normative trajectories of well-known large-scale neural networks across the natural life span （6-85 years of age）. The CCS has been made freely available to the public via GitHub （https：//github.com/ zuoxinian/CCS） and our laboratory＇s Web site （http：//lfcd. psych.ac.cn/ccs.html） to facilitate progress in discovery science in the field of human brain connectomics.

UNBOUNDED BATCH SCHEDULING WITH A COMMON DUE WINDOW ON A SINGLE MACHINE

The common due window scheduling problem with batching on a single machine is dealt with to minimize the total penalty of weighted earliness and tardiness. In this paper it is assumed that a job incurs no penalty as long as it is completed within the common due window. It is the first time for the due window scheduling to be extended to this situation so that jobs can be processed in batches. An unbounded version of batch scheduling is also considered. Hence, jobs, no matter how many there are, can be processed in a batch once the machine is free. For two cases that the location of due window is either a decision variable or a given parameter, polynomial algorithms are proposed based on several optimal properties.

Dynamical Criticality:Overview and Open Questions

Systems that exhibit complex behaviours are often found in a particular dynamical con- dition, poised between order and disorder. This observation is at the core of the so-called criticality hypothesis, which states that systems in a dynamical regime between order and disorder attain the highest level of computational capabilities and achieve an optimal trade-off between robustness and flexibility. Recent results in cellular and evolutionary biology, ueuroscience and computer science have revitalised the interest in the criticality hypothesis, emphasising its role as a viable candidate general law in adaptive complex systems. This paper provides an overview of the works on dynamical criticality that are -- To the best of our knowledge -- Particularly relevant for the criticality hypothesis. The authors review the main contributions concerning dynamics and information processing at the edge of chaos, and illustrate the main achievements in the study of critical dynamics in biological systems. Finally, the authors discuss open questions and propose an agenda for future work.

Progress in international geopolitical research from 1996 to 2015

Focusing on international relations from the perspective of geography, geopolitics exerts powerful influences on the course of economic and political development in the world. In the tide of globalization and information technology, geopolitics has become an important subject for global pattern interpretation and policy making. It is essentially important to have a scientific and systematic review on international geopolitics to promote its development. Based on the bibliometric statistics, the paper reviews the research development of geopolitics on the Web of Science from 1996 to 2015. The history, journals, papers and key research areas of geopolitics have been revealed in the paper. By the analysis of bibliometric statistics, the number of papers recently published in the journals of political geography and related geography journals continues to increase. The key areas of geopolitical papers which are globally highly cited include geopolitical interpretation of the countries and borders, critical geopolitics, emotional geopolitics, feminist geopolitics and other topics. Before the year of 2000, the state and borders were hot topics of the geopolitical research. Yet since 2000, it has been the trend that the geopolitics is increasingly set in the context of geographical implications. At the same time, critical geopolitics appears to be the main area of geopolitical research, especially transitioning from traditional geopolitics towards the humanism-embeddedness(such as emotional geopolitics, feminist geopolitics). The paper then systematically reviews the branch trends of geopolitical research, including the borders and the territory, global geo-culture and geo-economics, Chinese models of geopolitics, resource conflicts and ecological politics, as well as emotional geopolitics. Finally, it puts forward the implication that Chinese geopolitical studies should reinforce the importance of geographical space and scale, use the process of description and multiple methods, as well as integrate humanistic thoughts, in order to further enrich the theories and practices of geopolitical research.