检索结果-南通市图书馆

Genetic diversity of Medicago ruthenica in inner mongolia on using SSr markers

在线全文

cnki会议

学校读者我要写书评

暂无评论

Genetic diversity of Medicago Ruthenica in Inner Mongolia on...

ⅩⅪ International Grassland Congress and the Ⅷ International rangeland Congress

作者： LI Hong-yan~(1,2),LI Zhi-yong~1,MI Fu-gui~(2*),LU Xin-xiong~1,NINO Hong-mei~2,SHI Wen-gui~1,LI Xing-you~1 1 Grassland research Institute,CAAS,hohhot,inner mongolia 010010 p.r.of china 2 college of ecol.and env.sci.,inner mongolia agric.univ.,hohhot,inner mongolia 010018 p.r.of china 3 Institute of Crop science,CAAS,Beijing 100081 p.r.of china

＜正＞Introduction Medicago ruthenica is a perennial leguminous herb,characterized by its eco-wide adaptability,barren resistance, cold resistance,drought resistance and high nutritional *** this study,we used SSr molecular markers to categorize wild Medicago ruthenica of inner mongolia for the first time,and suggest a theoretical foundation for the research of wild Medicago ruthenica.

关键词： Medicago ruthenica SSr genetic diversity

Completeness of the System of root Vectors of 2×2 Upper Triangular Infinite-Dimensional Hamiltonian Operators in Symplectic Spaces and Applications

在线全文

cnki会议

学校读者我要写书评

暂无评论

Chinese Annals of Mathematics,Series B 2011年第6期32卷 917-928页

作者： ALATANCANG School of Mathematical sciences Inner Mongolia University

The authors investigate the completeness of the system of eigen or root vectors of the 2×2 upper triangular infinite-dimensional Hamiltonian operator H ***,the geometrical multiplicity and the algebraic index of the eigenvalue of H0 are ***,some necessary and sufficient conditions for the completeness of the system of eigen or root vectors of H0 are ***,the obtained results are tested in several examples.

关键词： Hamilton算子根向量整性系统三角辛空间无限维应用

Exchange bias for ferromagnetic/antiferromagnetic bilayers with the uniaxial anisotropy being misaligned with the exchange anisotropy

在线全文

学校读者我要写书评

暂无评论

science china(physics,Mechanics & Astronomy) 2009年第12期52卷 1885-1892页

作者： BAI YuHao1 & YUN GuoHong1,2 1 college of physical science and Technology,inner mongolia university,hohhot 010021,china 2 Key Laboratory of physics and Chemistry of Functional Materials,college of physics and Electronic Information,inner mongolia Normal university,hohhot 010022,china college of physical science and Technology Inner Mongolia University Hohhot China Key Laboratory of physics and Chemistry of Functional Materials College of Physics and Electronic Information Inner Mongolia Normal University Hohhot China

Using the principle of minimal energy and S-W model,the exchange bias for ferromagnetic/antiferro-magnetic bilayers has been investigated when the uniaxial anisotropy is misaligned with the exchange anisotropy. According to the relation between the energy of the bilayer and the orientation of ferro-magnetic magnetization,it is found that the bilayer will be in the monostable state or bistable state when the external field is absent in the initial magnetization state. The monostable state or bistable state of the bilayer,which determines the angular dependence of exchange bias directly,is controlled by the competition between the exchange anisotropy and uniaxial anisotropy. When the applied field is parallel to the intrinsic easy axes and intrinsic hard axes,one of the switching fields of the hysteresis loop shows an abrupt change,while the other keep continuous by analyzing the magnetization reversal processes. Consequently,the exchange bias field and the coercivity will show a jump phenomenon. The numerical calculations indicate that both the magnitude and direction of the exchange anisotropy will significantly affect the angular dependence of exchange bias. The jump phenomenon of exchange bias is an intrinsic property of the bilayer,which is dependent on the interfacial exchange-coupling constant,the orientation of the exchange anisotropy,the thickness and uniaxial anisotropy constant of the ferromagnetic layer.

关键词： monostable state bistable state intrinstic easy axis intrinstic hard axis switching field

Microscopic and Dynamic rheological Characteristics of Crumb rubber Modified Asphalt

在线全文

学校读者我要写书评

暂无评论

Journal of Wuhan university of Technology(Materials science) 2010年第6期25卷 1022-1026页

作者：王岚 college of Civil Engineering Inner Mongolia University of Technology

A test for crumb rubber modified asphalt containing 20% crumb rubber particles（30 mesh） was performed using a scanning electron microscope（SEM）.The experimental results indicate that the crumb rubber particles are evenly distributed in the *** rate sweep and shear-temperature sweep tests on the crumb rubber modified asphalt at-20-80 ℃ using a dynamic shear rheology（DSr） instrument,were carried *** tests show that the complex modulus decreases with increasing temperature;at equivalent temperature,higher load frequencies lead to a larger complex modulus,and this value increasingly decreases as the temperature increases;the phase angle increases with temperature and decreases as the load frequency *** can be concluded that the rutting resistance limiting temperature of crumb rubber modified asphalt is 78 ℃,and the anti-fatigue limiting temperature is 16 ℃,which shows that the asphalt has preferable rutting resistance characteristics at high temperature,as well as anti-fatigue *** addition,the complex modulus master curve at different temperatures was plotted according to the time temperature equivalence principle,which allows the study of the dynamic state behavior of crumb rubber modified asphalt at a wide range of load frequency.

关键词： crumb rubber modified asphalt microcosmic characteristic rheology characteristic complex modulus phase angle

response of arid grassland community standing crop to banning grazing and deferral grazing management

在线全文

学校读者我要写书评

暂无评论

Response of arid grassland community standing crop to bannin...

ⅩⅪ International Grassland Congress and the Ⅷ International rangeland Congress

作者： Wei Zhijun Yan ruirui Liu Hongmei Yun Xiangjun college of ecol.and env.sci. inner mongolia agric.univ. hohhot inner mongolia 010019 p.r..china.

＜正＞Introduction Spring deferral grazing is a grazing strategy that can avoid grassland damage from livestock grazing and trampling during the sensitive grasses-turning-green *** strategy can effectively improve grassland ecological environment（Li et al.,2001;Zhao et al.,2003;Li,2005）.The study was conducted in two grazing systems of banning grazing and deferral grazing in Stipa breviflora desert *** on the dynamics of forage yield were made for the two *** results may have important implication to the sustainable use of grassland and grassland ecosystem managements.

关键词： gesert steppe community standing crop banning grazing deferral grazing

Effect of hormonal status and metabolic changes of restricted ewes during late pregnancy on their fetal growth and development

在线全文

cnki会议

学校读者我要写书评

暂无评论

science china(Life sciences) 2007年第6期50卷 766-772页

作者： GAO Feng1, HOU XianZhi1 & LIU YingChun2 1 college of Animal science and Animal Medicine, inner mongolia agricultural university, Huhhot 010018, china 2 college of Biotechnology and Bioengineering, inner mongolia agricultural university, Huhhot 010018, china college of Animal science and Animal Medicine Inner Mongolia Agricultural University Huhhot China college of Biotechnology and Bioengineering Inner Mongolia Agricultural University Huhhot China

This study investigated the effects of hormonal status and metabolic changes of restricted ewes during late pregnancy on the ovine fetus growth and development. One hundred mongolian ewes, synchro- nized for oestrus and mated, were divided into three groups and offered 0.175 MJME·kgw-0.75·d-1 (re- stricted Group 1, rG1), 0.33 MJME·kgw-0.75·d-1 (restricted Group 2, rG2) and ad libitum access to feed (Control Group, CG) during their late pregnancy respectively. The results suggested that with the sup- ply of exogenous energy decreasing during late pregnancy, maternal body weight and net body weight loss in rG2 and rG1 were lower than those of CG (prations of ewes in rG2 and rG1 tended to be lower than those of CG (p>0.05), but the GH concentrations in rG2 and rG1 were enhanced and there was significant difference between rG1 and CG on d 120 of gesta- tion (pration of ewes in rG2 and rG1 was decreased throughout the feed restriction period, and the differences were observed between rG1 and CG on d 120 of gestation (prified fatty acid (NEFA) and total amino acid (TAA) concentrations of ewes in rG2 tended to increase, but there was no significant difference (p>0.05). However, the NEFA and FAA concentrations of ewes in rG1 were reduced from d 90 to d 120 of gestation, then enhanced from d 120 to d 140 of gestation. During the late pregnancy, with the supply of nutrition decreasing, the negatively physiological and biochemical maternal reactions to restriction became worse, which sig- nificantly reduced the average lamb birth weight and daily growth rate of fetus in rG2 (prG1 (p<0.01).

关键词： late pregnancy, restricted ewes, fetus, growth and development

Studies on attachment behavior of germinating surface-sown Mengnong Sainfoin and Astragalus adsurgens seeds

在线全文

学校读者我要写书评

暂无评论

Studies on attachment behavior of germinating surface-sown M...

ⅩⅪ International Grassland Congress and the Ⅷ International rangeland Congress

作者： Mi Yanjie~1,Shi Fengling~1,Gao Cuiping~1,Lv Ning 1 college of ecol.and env.sci.,inner mongolia agric.univ.hohhot,inner mongolia 010018 p.r.of china

＜正＞Introduction Aerial seeding is widely used in grassland establishment and regeneration as one of the key approaches of seeding on the soil surface（W Liu 2003）.Low germination percentage,unstable attachment,and low seedling emergence often occur with aerial *** of seedling establishment is often influenced by seed germination characteristics and the environment （Osamu Morita 1995）.Behavior of the seed’s radicle can also be important in seedling establishment from surface sown seeds. Thus we are investigating the radicle attachment characteristics of two forbs.

关键词： germination behavior surface-sown attachment type

A research of the living environment in the pasturing area

在线全文

cnki会议

学校读者我要写书评

暂无评论

A research of the living environment in the pasturing area

ⅩⅪ International Grassland Congress and the Ⅷ International rangeland Congress

作者： Quo yajuan Gao yong Sun Xu college of ecol.and env.sci. inner mongolia agriculture university hohhot.inner mongolia 010018 p.r.china

＜正＞Introduction There are many grasslands in inner-mongolia,the environment of pasturing area has a very important role in the environment of the whole of *** herdsmen living in the grassland know the environment very well,so paying attention to the herdsmen’s satisfaction from the environment of the pasturing areas is an effective way to evaluate the environment of pasturing area and to project this to the environment of the grassland.

关键词： pasturing area living environment satisfaction environment biomass

Icosahedral quasicrystals solids with an elliptic hole under uniform heat flow

在线全文

cnki会议

学校读者我要写书评

暂无评论

Chinese physics B 2014年第5期23卷 397-403页

作者：李联和刘官厅 college of Mathematics science Inner Mongolia Normal University college of physical science and Technology Inner Mongolia University inner mongolia Key Laboratory of Nanoscience and Nanotechnology

The complex variable method for solving the two-dimensional thermal stress problem of icosahedral quasicrystals is stated. The closed-form solutions for icosahedral quasicrystals containing an elliptical hole subjected to a remote uniform heat flow are obtained. When the hole degenerates into a crack, the explicit solutions for the stress intensity factors is presented.

关键词： icosahedral quasicrystals thermal stress elliptic hole stress intensity factors