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一类最优光正交码的组合构作 被引量:1
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作者 唐煜 殷剑兴 《中国科学(A辑)》 CSCD 北大核心 2002年第1期31-38,共8页
光正交码具有民好的光学相关特性,它特别适用于光纤信道上的码分多址系统.利用Weil定理给出了参数为(15p,5,1)的最优光正交码的组合构作。其中p为模4余1且大于5的素数.由此,当正整数V的质因子均为模4余1且大于... 光正交码具有民好的光学相关特性,它特别适用于光纤信道上的码分多址系统.利用Weil定理给出了参数为(15p,5,1)的最优光正交码的组合构作。其中p为模4余1且大于5的素数.由此,当正整数V的质因子均为模4余1且大于5的素数时,(15v,5,1)最优光正交码可利用已知的递归构适方法得到. 展开更多
关键词 码分多址 组合构作 最优光正交码 光纤信道
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A Family--The Tension and the Satisfaction 被引量:1
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作者 Martin Vlcek 《Sociology Study》 2015年第7期533-537,共5页
Family members solve not only their interests, but make provision for interests of other members of the family, too. The space for the control at a higher level is thus formed. Without notifying, individual members in... Family members solve not only their interests, but make provision for interests of other members of the family, too. The space for the control at a higher level is thus formed. Without notifying, individual members in the process of provision making proceed depending on general rules of the organisation of elements into higher structures, as they exist in all stable objects. This provision making has different forms, starting with the love and ending with an assisted coexistence. The understanding of the role of individual controlling structures allows to improve the functioning of the family. Similarly, as a regular discussion of its functioning in the family and perhaps, their controlled casting by some of partners, too. The submitted work describes roles and the control in the elementary family--in the childless coexistence of partners. 展开更多
关键词 FAMILY tension SATISFACTION CONTROL successfulness
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Histological Characteristics of Hair Follicle Structure of Hezuo Swine from Gansu Province
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作者 汪磊 刘燕飞 《Agricultural Science & Technology》 CAS 2012年第9期1955-1957,共3页
The characteristics of skin hair follicle structure of Hezuo swine were in- vestigated using frozen section method and HE staining. Experimental results showed that the hair root, hair tip, outer sheath, inner sheath,... The characteristics of skin hair follicle structure of Hezuo swine were in- vestigated using frozen section method and HE staining. Experimental results showed that the hair root, hair tip, outer sheath, inner sheath, hair follicle group, fi- brous sheath, outer epidermis, inner epidermis, sebaceous gland and other organiza- tional structures of hair follicles of Hezuo swine can be clearly observed. The hair follicle pore size varied extremely significantly (P〈0.01) among different parts, showing a downward trend of shoulder 〈 body side 〈 buttocks; the hair follicle density ranged from 5.59 to 7.26 hair follicles/mm^2. This study provides reference for the in-dustrial and medical applications. 展开更多
关键词 Hezuo swine Hair follicles Frozen section HE staining
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Exercise is recreation not medicine
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作者 Andy Smith 《Journal of Sport and Health Science》 SCIE 2016年第2期129-134,共6页
Purpose: This paper responds to the question, is exercise medicine? It does so using a qualitative case study that proposes that exercise is recreation. The study (1) describes and reflects upon an exercise is rec... Purpose: This paper responds to the question, is exercise medicine? It does so using a qualitative case study that proposes that exercise is recreation. The study (1) describes and reflects upon an exercise is recreation metaphor, (2) establishes the principles and processes used to develop a sport park within which exercise is recreation, and (3) presents a comparative analysis of the exercise is recreation approach with a UK quality framework for "exercise referrals". Methods: Four years of documentation were collated and placed into 14 categories: (1) university strategies, (2) plans of the site, (3) policy documents, (4) minutes of a steering group, (5) contemporary documents, (6) organisational charts, (7) responses to local government policies on sport, (8) consultation documents, (9) operational procedures, (10) facility specifications, (11) partnership agreements, (12) material relating to the university's work on events, (13) notes on the universities sport department, and (14) timetables. These data were analysed through a 4-stage process which used recreation as the analytical theme for a comparative analysis. Results: The characteristics of the exercise is recreation metaphor in this case are (1) a focus on the experience of the user, (2) the promotion of well-being, (3) the importance of community, (4) embracing inclusivity, (5) sport, (6) aesthetics, and (7) leisure time. The principles and processes used to develop the sport park were (1) custodianship, (2) partnerships, (3) values, (4) inter-professional working, (5) local heritage, (6) change, (7) the natural park environment, and (8) "riding the bike as you build it". The comparative analysis with a UK quality framework for "exercise referrals" clearly shows a difference from an exercise is recreation approach. Conclusion: Exercise is recreation and may enable individuals and communities to reach a state of well-being. ~ 2016 Production and hosting by Elsevier B.V. on behalf of Shanghai University of Sport. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). 展开更多
关键词 Case study EXERCISE MEDICINE RECREATION
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Research on Optimization wharf Structure Type of Triangle frame pier
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作者 ZHOU Yang 《International English Education Research》 2016年第4期97-98,共2页
Based on optimization wharf structure type of triangle flame pier proposed, namely" Spatial triangular flame pier + Big span bent which taking Slant supports" Simulating three-dimensional pier model of a variety of... Based on optimization wharf structure type of triangle flame pier proposed, namely" Spatial triangular flame pier + Big span bent which taking Slant supports" Simulating three-dimensional pier model of a variety of conditions in the actual loading by structural finite element software. Under the guidance of the three-dimensional structure of the most unfavorable load combination algorithm, three-dimensional combination algorithm is applied to the new structure by the MATLAB software programming. Search and calculate the most unfavorable combination of action effects and the corresponding intemal force of the main member, checking the feasibility of the three-dimensional algorithms, Calculating the new wharf structure structural features and stability, Providing numerical reference for the design of this sort of wharf. 展开更多
关键词 The triangle flame pier Slant supports Three-dimensional model Three-dimensional Algorithm
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Recent developments of rare-earth-free hard-magnetic materials
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作者 Da Li DeSheng Pan +1 位作者 ShaoJie Li ZhiDong Zhang 《Science China(Physics,Mechanics & Astronomy)》 SCIE EI CAS CSCD 2016年第1期16-32,共17页
Recent advances in rare-earth-free hard-magnetic materials including magnetic bulk, thin films, nanocomposites and nanostructures are introduced. Since the costs of the rare-earth metals boosts up the price of the hig... Recent advances in rare-earth-free hard-magnetic materials including magnetic bulk, thin films, nanocomposites and nanostructures are introduced. Since the costs of the rare-earth metals boosts up the price of the high-performance rare-earth permanent magnets, there is a much revived interest in various types of hard-magnetic materials based on rare-earth-free compounds. The 3d transition metals and their alloys with large coercivity and high Curie temperatures(working temperatures) are expected to overcome the disadvantages of rare-earth magnets. Making rare-earth-free magnets with a large energy product to meet tomorrow's energy needs is still a challenge. 展开更多
关键词 rare-earth-free hard-magnetic phases COERCIVITY magnetic anisotropy magnetic proper-ties of nanostructures
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