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1Influence of differential settlement on pavement structure of widened roads based on large-scale model test显示文摘This study introduced at first the background of numerous highway widening projects that have been developed in recent years in China.Using a large ground settlement simulator and a fiber Bragg grating (FBG) strain sensor network system,a large-scale model test,with a similarity ratio of 1:2,was performed to analyze the influence of differential settlement between new and old subgrades on pavement structure under loading condition.The result shows that excessive differential settlement can cause considerable tensile strain in the pavement structure of a widened road,for which a maximum value (S) of 6 cm is recommended.Under the repetitive load,the top layers of pavement structure are subjected to the alternate action of tensile and compressive strains,which would eventually lead to a fatigue failure of the pavement.However,application of geogrid to the splice between the new and the old roads can reduce differential settlement to a limited extent.The new subgrade of a widened road is vulnerable to the influence of dynamic load transferred from the above pavement structures.While for the old subgrade,due to its comparatively high stiffness,it can well spread the load on the pavement statically or dynamically.The test also shows that application of geogrid can effectively prevent or defer the failure of pavement structure.With geogrid,the modulus of resilience of the subgrade is increased and inhomogeneous deformation can be reduced;therefore,the stress/strain distribution in pavement structure under loading condition becomes uniform.The results obtained in this context are expected to provide a helpful reference for structural design and maintenance strategy for future highway widening projects.Xiaolin Weng1,2,Wei Wang3 1 Key Laboratory for Special Area Highway Engineering of Ministry of Education,Chang’an University,Xi’an,710064,China 2 CCCC First Highway Consultants Co.,Ltd.,Xi’an,710068,China 3 Henan Vocational and Technical College of Communications,Zhengzhou,450005,China 2011Journal of Rock Mechanics and Geotechnical Engineering2011,3,1:11
2以提升语文应用能力为核心的中职语文教学改革实践显示文摘长沙市财经职业中专学校在语文教学改革实践中,根据财经类学生专业发展的需要,以培养学生阅读欣赏、表达交流等语文应用能力为核心,以语文实践活动为载体,推进语文教学内容模块化、组织教学情境化、能力训练项目化、评价方式开放化,为提升学生的综合能力和职业素养奠定了基础。Chinese Teaching Research Team(Changsha Financial Secondary Vocational School,Changsha Hu’nan 410000,China) 2011职业技术教育2011,32,8:7
3Construction of Eco-tourism Sites Based on the Experience of Eco-tourism显示文摘Taking Lingtong Grand Canyon in Jingxi County, Baise City, Guangxi, China as a research object, the face-to-face questionnaire survey on tourist is carried out, in order to obtain the basic situation of the interviewees, as well as their expectation for the eco-tourism experience. Factor analysis method is adopted to test the interviewees′ expectation of the eco-tourism experience. Result shows that eco-tourism experience of tourist is mainly reflected in the ecological leisure experience, the ecological tourism experience, the ecological experience in scenic spot, and the self-realization experience. Analysis on the recognition of the expectation for eco-tourism experience shows that the interviewees′ expectations of the eco-tourism experience are in the order of the ecological experience in scenic spot, the eco-tourism experience, the ecological leisure experience, and the self-realization experience. Difference analysis on the interviewees′ expectations for the eco-tourism experience is carried out by market segmentation. Result shows that there are significant differences in the demand of eco-tourism experience among different types of tourisms. According to the investigation result, countermeasures for the construction and marketing of eco-tourism sites are put forward.LU Rui Nanning College for Vocational Technology, Nanning 530003, China 2010Asian Agricultural Research2010,2,9:7
4The Asymptotic Behavior of a Class of Second Order Differential Equation显示文摘In the paper the asympotic behavior of the solution of the following second order differential equation y+ q(t)f(y) =0 is investigated. Some results for asymptotic behavior of the nonoscillation solution are obtained.FENG Zhao-sheng, WANC Xiao-hui, LI Jin-cheng ( Dept. of Math., Texas A&M University, College Station, TX 77843, USA Dept. of Stat., Texas A&M University, College Station, TX 77843, USA Basic Dep., Tianjin Vocational Tech. & Teaching College, Tianjin 3 2001Journal of Mathematical Research and Exposition2001,21,3:6
5Comparison on neural networks and support vector machines in suppliers' selection显示文摘Suppliers' selection in supply chain management (SCM) has attracted considerable research interests in recent years. Recent literatures show that neural networks achieve better performance than traditional statistical methods. However, neural networks have inherent drawbacks, such as local optimization solution, lack generalization, and uncontrolled convergence. A relatively new machine learning technique, support vector machine (SVM), which overcomes the drawbacks of neural networks, is introduced to provide a model with better explanatory power to select ideal supplier partners. Meanwhile, in practice, the suppliers' samples are very insufficient. SVMs are adaptive to deal with small samples' training and testing. The prediction accuracies for BPNN and SVM methods are compared to choose the appreciating suppliers. The actual examples illustrate that SVM methods are superior to BPNN.Hu Guosheng1,2 & Zhang Guohong3 1. School of Management, Guangdong Vocational Coll. of Science and Technology, Guangzhou 510640, P. R. China 2. School of Computer and Information, Anqing Teacher Coll., Anqing 246011, P. R. China 3. Adult Education Coll., Guangzhou Univ., Guangzhou 510405, P. R. China 2008Journal of Systems Engineering and Electronics2008,19,2:6
6A New Phenylated Flavone from Melicope pteleifolia显示文摘Objective To study the constituents in Melicope pteleifolia.Methods Plant material was isolated with 80% EtOH.Compounds were separated with chromatographic methods and their structures were elucidated on the basis of spectral analysis(EI-MS,1H-NMR,and 13C-NMR) and chemical evidence.Results Five compounds were isolated from petrol ether or ethyl acetate soluble fraction.Their structures were identified as 3,5,3'-trihydroxy-4'-methoxy-7-(3-methylbut-2-enyloxy) flavone(pteleifolosin C,1),3,7-dimethoxyl kaempferol(kamatakenin,2),vanillic acid(3),tricosanoic acid tetradecyl ester(4),and β-sitosterol(5),respectively.Conclusion Compound 1 is a new structure named pteleifolosin C.Compounds 2-4 are isolated from this plant for the first time.ZHU Sheng-hua1,2,GAO You-heng1,WEI Zhi-xiong1,XU Rui1 1.Guangzhou University of Chinese Medicine,Guangzhou 510405,China 2.Guangdong Food and Drug Vocational College,Guangzhou 510520,China 2011Chinese Herbal Medicines2011,3,2:5
7Preliminary Study of Ancient Town Protection and Rural Tourism Development of Caoshi Town in Hengdong County,Hunan Province显示文摘The typical style and features of mountains and waters in Caoshi Ancient Town,have hitherto been well preserved. Caoshi Ancient Town boasts superior base of the natural eco-environment and deep-rooted background of regional culture,where mountains,waters,shoals,towns and other landscape elements are merged harmoniously,the transportation and geographical conditions have been fundamentally changed. Ancient towns,old temples,ancient forests,ancient wells and ancient piers are unique in different ways,with characteristics of tourism resources such as long history and ancient folklore. It should seize the historical opportunity of China vigorously developing rural tourism based on the construction of the new socialist countryside,to make characteristic agricultural economy gain ground; assume the leading role to drive the development of tourism economy in surrounding areas; correctly handle the relationship between development and protection to walk the path of sustainable development of tourism.LIU Tian-zhao 1 ,YANG Zai-tian 1,2 ,LIU Pei-lin 1 1. Department of Resource Environment and Tourism Management,Hengyang Normal University,Hengyang 421008,China 2. School of Economics and Management,Hunan Science and Technology Economy Trade Vocation College,Hengyang 421009,China 2012Asian Agricultural Research2012,4,8:5
8Existing Problems in Energy Exploitation and Eco-environment Sustainable Development and Their Countermeasures in Northern Shaanxi显示文摘The exploitation of coal, petroleum and natural gas in northern Shaanxi not only promoted the rapid development of economy, but also brought about enormous pressure to fragile ecology and resulted to severe water pollution, water and soil loss, vegetation destruction and other ecological environmental problems, so many countermeasures were put forward according to these problems, such as greatly developing circular economy, conducting cleaner production in petroleum enterprises, continuously renewing mining technology and so on.GUO Jun-quan1, YANG Zhi-guo2 1. Department of Agriculture and Forestry Architecture, Yan’an Vocational and Technical College, Yan’an 716000, China 2. Yanan Municipal Environmental Protection Monitoring Station, Yan’an 716000, China 2011Meteorological and Environmental Research2011,2,4:4
9Phototoxic effect of UVR on wild type, ebony and yellow mutants of Drosophila melanogaster: Life Span, fertility, courtship and biochemical aspects显示文摘Melanin plays an important role in protecting organisms from ultraviolet radiation (UVR). Therefore, it is possible that differently colored strains can show different sensitivities to UVR. In the present work, life span, fertility and courtship behavior of wild type (w), ebony (e) and yellow (y) strains of Drosophila melanogaster were studied to evaluate their sensitivity to ultraviolet (UV). Because a range of photo- toxic effects of UVR are mediated through generation of free radicals, levels of free radicals, lipid per- oxide (malondialdehyde, MDA) and superoxide dismutase (SOD) activity of three strains were examined to indicate their antioxidant defending ability and oxidative status. It was shown that w always had the highest lifespan and fertility not only in the control but also in UV-exposed groups. Moreover, lifespan and fertility of e were significantly higher (P<0.0001) than those of y in the UV-exposed groups, but not for the control. On the other hand, UV exposure had an adverse effect on courtship of flies. Stronger electron paramagnetic resonance (EPR) signals could be detected in w, e and y exposed to 5 min UV. And there were more significant changes of EPR signals in y than in w and e. UVR had no significant (P=0.1782) effect on the SOD activities. After pooling data from the control and UV-exposed groups, we found that w had a significantly (P<0.05) higher level of SOD activity, but e and y were nearly at the same levels (P>0.05). MDA levels were increased in the UV dose-dependent manner (P=0.0495). In con- clusion, our results suggested that UVR can decrease life span and fertility of flies and do harm to courtship, which may be due to oxidative damage to flies tissues (e.g. central nervous system) induced by free radicals. w had the highest tolerance to UVR, which may be ascribed to its advantage of survival under the natural condition and at high level of SOD activity. Then differences of pigment between e and y in absorbing UV, shielding against UV and scavenging free radicals produced by UVR should be responsible for their different sensitivity to UVR.WANG ZhePeng1,2, LIU RuiFang2, WANG AnRu3, DU LiLi1 & DENG XueMei1 1 College of Animal Science and Technology, China Agricultural University, Beijing 100094, China 2 Vocational and Technologic College, Inner Mongolia Agriculture University, Baotou 014109, China 3 College of Veterinary Medicine, China Agricultural University, Beijing 100094, China 2008Science China(Life Sciences)2008,51,10:4
10The proof of Ushio's conjecture concerning path factorization of complete bipartite graphs显示文摘Let Km,n be a complete bipartite graph with two partite sets having m and n vertices, respectively. A Pv-factorization of Km,n is a set of edge-disjoint Pv-factors of Km,n which partition the set of edges of Km,n. When v is an even number, Wang and Ushio gave a necessary and sufficient condition for existence of Pv-factorization of Km,n. When k is an odd number, Ushio in 1993 proposed a conjecture. Very recently, we have proved that Ushio's conjecture is true when v = 4k - 1. In this paper we shall show that Ushio Conjecture is true when v = 4k + 1, and then Ushio's conjecture is true. That is, we will prove that a necessary and sufficient condition for the existence of a P4k+1-factorization of Km,n is (i) 2km ≤ (2k + 1)n,(ii) 2kn ≤ (2k + 1)m, (iii) m + n ≡ 0 (mod 4k + 1), (iv) (4k + 1)mn/[4k(m + n)] is an integer.DU Beiliang & WANG Jian Department of Mathematics, Suzhou University, Suzhou 215006, China Nantong Vocational College, Nantong 226007, China 2006Science China Mathematics2006,49,3:3
11Research on the Willingness to Accept Compensation and Compensation Sharing of Returning Land for Farming to Forestry in Zhangjiakou and Chengde Region显示文摘[Objective] The aim was to study the willingness to accept compensation and compensation sharing of returning land for farming to forestry in Zhangjiakou and Chengde region.[Method] Based on the investigation of farmers' willingness to accept ecological compensation in Zhangjiakou and Chengde region,farmers' willingness to accept compensation was quantized,and the calculation model of sharing rate of ecological compensation was established,finally the sharing rate of ecological compensation was calculated choosing water supply quantity as reference.[Result] Farmers' willingness to accept compensation in Zhangjiakou and Chengde region was 2 740.5 yuan/(hm2·a),and returned farmland area was 429 700 hm2 in 2008,so the willingness to accept ecological compensation was up to 1.178 billion yuan/a.In addition,the ecological compensation sharing rate of government was 37.60% in Beijing,42.75% in Tianjing and 19.64% in Tangshan,and their ecological compensation funds were 443,504 and 231 million yuan,respectively.[Conclusion] The study could provide important foundation for the establishment of ecological compensation standard and implementation of ecological compensation in Zhangjiakou and Chengde region.WANG Yan-xia1,CHEN Xu-dong1,ZHANG Su-juan1,BAI Jie2,ZHANG Yi-wen3 1.Institute of Geographical Science,Hebei Academy of Science,Shijiazhuang 050011,China 2.Computer Department,Hebei Vocational College of Politics and Law,Shijiazhuang 050081,China 3.College of Resources and Environment Science,Hebei Normal University,Hebei Key Laboratory of Environmental Change and Ecological Construction,Shijiazhuang 050016,China 2011Meteorological and Environmental Research2011,2,5:3
12K_(p,q)-factorization of complete bipartite graphs显示文摘Let Km,n be a completebipartite graph with two partite sets having m and n vertices,respectively. A Kp,q-factorization of Km,n is a set ofedge-disjoint Kp,q-factors of Km,n which partition theset of edges of Km,n. When p=1 and q is a prime number,Wang, in his paper 'On K1,k-factorizations of a completebipartite graph' (Discrete Math, 1994, 126: 359-364),investigated the K1,q-factorization of Km,n and gave asufficient condition for such a factorization to exist. In the paper'K1,k-factorizations of complete bipartite graphs' (DiscreteMath, 2002, 259: 301-306), Du and Wang extended Wang's resultto the case that q is any positive integer. In this paper, we give a sufficient condition for Km,n to have aKp,q-factorization. As a special case, it is shown that theMartin's BAC conjecture is true when p:q=k:(k+1) for any positiveinteger k.DU Beiliang WANG Jian Department of Mathematics, Suzhou University, Suzhou 215006, China Nantong Vocational College, Nantong 226007, China 2004Science China Mathematics2004,47,3:3
13高职院校顶岗实习学生权益保护研究显示文摘目前我国没有关于高职学生顶岗实习的专门法律,关于学生顶岗实习的相关规定也过于原则,缺乏可操作性,严重滞后于社会发展的实际。学生顶岗实习活动符合劳动关系的一般特征,实习生是与用人单位形成事实劳动关系的特殊劳动者,实习伤害保障是社会保障法律体系的应有内容。通过分析我国高职学生顸岗实习的立法概况及主要问题,总结了高职学生顶岗实习保障缺失的原因,提出了解决实习生权益保护问题的建议。(Liaoning Health Vocational and Technical College,Shenyang Liaoning 110101, China) 2013辽宁公安司法管理干部学院学报2013,,1:3
14P_(4k-1)-factorization of complete bipartite graphs显示文摘Let Km,n be a complete bipartite graph with two partite sets having m and n vertices, respectively. A Pv-factorization of Km,n is a set of edge-disjoint Pv-factors of Km,n which partition the set of edges of Km,n. When v is an even number,Wang and Ushio gave a necessary and sufficient condition for the existence of Pv-factorization of Km,n. When v is an odd number, Ushio in 1993 proposed a conjecture. However, up to now we only know that Ushio Conjecture is true for v=3. In this paper wewill show that Ushio Conjecture is true when v=4k-1. That is, we shall prove that a necessary and sufficient condition for the existence of a P4k-1-factorization of Km,n is (1) (2k-1)m≤2kn, (2) (2k-1)n ≤2km, (3) m+n ≡0 (mod 4k-1), (4) (4k-1)mn/[2(2k-1)(m+n)] is an integer.integer.DU Beiliang & WANG Jian Department of Mathematics, Suzhou University, Suzhou 215006, China Nantong Vocational College, Nantong 226007, China 2005Science China Mathematics2005,48,4:2
15Perspective of Chinese Forest Carbon Absorption Trade Based on Low-Carbon Economy显示文摘The paper analyzes the basis of forest carbon trade including the feasibility of carbon absorption trade,main body,platform and standard.The purposes of capital of carbon absorption trade is introduced.Caron absorption trade capital can be used to resettle ecological migrants,absorb employment,build forest and increase fund,increase local income,enhance forest science and technology development and launch environmental proportion.The perspective of developing forest carbon absorption trade is pointed out and the practical problems of developing forest carbon trade need to be solved.For example,the property problem of forest resources,value calculation problem of forest resources and sustainable development of forest.WANG Ming-gang Guangzhou Vocational College of Technology & Business,Guangzhou 511442,China 2011Asian Agricultural Research2011,3,5:2
16The Mode Reform of Cultivating Marketing Talents in Agricultural Vocational Colleges Based on the Perspective of Agricultural Enterprises——A Case Study of Wenzhou Vocational College of Science and Technology显示文摘We conduct survey on the characteristics of demand of agricultural enterprises for agricultural marketing talents from the following 6 aspects:the professional marketing talents needed urgently by the agricultural enterprises,the amount of demand of agricultural enterprises for the marketing talents,the jobs offered by the agricultural enterprises,the educational background of agricultural marketing talents favored by the agricultural enterprises,the requirements posed by the agricultural enterprises on the work experience of agricultural marketing talents,and the quality requirements posed by the agricultural enterprises on the agricultural marketing talents.We analyse the problems existing in the cultivation mode of marketing talents in agricultural vocational colleges as follows:the feature of major is not outstanding;the contradiction between supply and demand is prominent;it is disconnected with the practical needs of agricultural enterprises;the cultivation form of practical ability is simple.On the basis of this,taking Wenzhou Vocational College of Science and Technology as an example,we advance the new mode of cultivating inter-disciplinary talents integrating 'marketing technique+technique marketing',and establish characteristic agricultural course combo system on the basis of vocational position orientation.In the meantime,we propose that we should conduct close college-enterprise cooperation with the local leading agricultural enterprises.This cultivation mode reform of talents is favorable for the agricultural enterprises,especially small and medium-sized agricultural enterprises to foster 'marketable' agricultural marketing talents,elevate the comprehensive competitiveness of small and medium-sized agricultural enterprises,serve the local economy,and promote the development of modern agriculture,and China's agriculture,farmer,and countryside.CHEN Fang-li,WANG Yang Wenzhou Vocational College of Science and Technology,Wenzhou 325006,China 2011Asian Agricultural Research2011,3,8:2
17Typical Survey and Research on Returning-home Migrant Workers' Entrepreneurship in Jiangxi Province under Post-financial Crisis显示文摘In order to study the entrepreneurship situation of Jiangxi return migrant workers after the financial crisis,we have conducted a survey on 107 entrepreneurial return migrant workers in 6 counties of Jiangxi Province.The results show that the return of migrant workers is mainly attributed to personal factors,while social factors are also very important.The major difficulties facing return migrant workers are the funding difficulties,complicated formalities to start a business,difficulty in safeguarding their rights and interests,their own low quality and so on.The support needed by the return migrant workers from the government is manifested in five aspects,say,to improve the service and management for the entrepreneurship of migrant workers,to provide financing policy support,to increase the preferential fiscal and taxation policies,to enhance the entrepreneurship training and to provide preference for the return migrant workers to use land.OUYANG Zhang-sun1,ZHANG Xin-zhi2,WANG Run-qun3,LUO Feng1,SHEN Ai-guo1,WU Xing-lin1 1.Jiangxi Biotech Vocational College,Nanchang 330299,China 2.The Research Center of the Central China’s Economic Development,Nanchang University,Nanchang 330047,China 3.Jizhou Agricultural Bureau,Jizhou District,Ji’an City in Jiangxi Province,Ji’an 343000,China 2010Asian Agricultural Research2010,2,10:2
18A CONSIDERATION OF DIFFERENT INDIVIDUAL FACTORS IN CLASSROOM LANGUAGE TEACHING显示文摘Students’ individual differences pose a challenge to language teachers and influence the way in which a foreign language is learned. We are therefore invited to consider the role of our students’ personalities,motivation and cognitive styles in the language classroom. LANGUAGE teaching would be much easier if all students were alike. The number of instructional decisions would be greatly reduced; teaching methods would be rather simpler; lesson designs would not have to be modified; teachers would not have to consider alternative procedures; teacher-studentGao Zhiguo Jingming Vocational and Technical Education Centre, Gansu Province 1998Chinese Journal of Applied Linguistics1998,21,1:2
19A New Diol from Dimocarpus longan Seeds显示文摘Objective To investigate the chemical constituents of Dimocarpus longan seeds in Sapindaceae.Methods The chemical constituents were isolated from the ethanol extract of D.longan seeds by silica gel column chromatography.Their structures were identified on the basis of physical and chemical properties and spectral analysis.Results One compound was isolated and identified as 2-methyl-1,10-undecanediol,named longandiol(1).Conclusion Compound 1 is a new compound.ZHENG Gong-ming1,2,XU Liang-xiong2,XIE Hai-hui2,WU Ping2,WEI Xiao-yi2 1.Guangdong Food and Drug Vocational College,Guangzhou 510520,China 2.South China Botanical Garden,the Chinese Academy of Sciences,Guangzhou 510650,China 2011Chinese Herbal Medicines2011,3,1:2
20《氾胜之书》哲学思想浅析显示文摘中国先秦至汉代以来形成的朴素唯物主义和朴素辩证法是《胜之书》哲学思想形成的重要前提。书认为土壤管理、保墒和保肥是相互联系的。在西北旱农地区 ,保墒是农业生产中的主要矛盾 ,保墒应重视保留住雨水和雪水。书不仅强调在关键时期进行耕地 ,也强调耕作因时、因土壤状况不同而异 ,书中还包含了“三才”论和“三宜”SHENG Bo biao (Yangling Vocation and Technology College, Yangling, Shaanxi 712100, China)\ 2002西北农林科技大学学报(社会科学版)2002,2,6:2
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