共查询到20条相似文献,搜索用时 125 毫秒
1.
杨晓玲 《河北科技师范学院学报》1996,(2)
生化黄腐酸(BcFA)浸种对小麦幼苗生长及干旱时的生理影响杨晓玲(河北农业技术师范学院园艺系,昌黎,066600)THEEFFECTOFBIOCHEMICALFULVICACID(BcFA)ONTHEGROWTHOFWNEATSEEDLINGANDS... 相似文献
2.
钟振余 《浙江海洋学院学报(自然科学版)》1997,(1)
舱内渔获物滑动对船舶稳性的影响EFFECTOFCAUGHTFISHESSLIDEINSIDESHIP'SHOLDTOTHESHIP'SSTABILITY钟振余Zhongzhenyu(宁波大学,宁波315211)(NingboUniversity,Ni... 相似文献
3.
Wang Peiguang 《河北省科学院学报》1994,(1)
LINEARSTABILITYOFTWO-LAYERGENERALIZEDNEWTONIANFLUIDSFLOWINGDOWNANINCLINEDPLANE¥WangPeiguang(DepartmentofMathematics,HebeiUniv... 相似文献
4.
LEAKYLAMBWAVESINMULTI┐LAYEREDFLUID┐SATURATEDPOROUSMEDIAIMMERSEDINLIQUIDZhouYufeng1)WangYaojun1)MaLi2)GaoTianfu2)(1)Institute... 相似文献
5.
冯景星 《福州大学学报(自然科学版)》1996,(2):124-127
高输人阻抗低噪声JFET的研究冯景星(福州大学电子科学与应用物理系,福州,350002)1理论分析1.1漏电流ID与同源电压VDS、栅源电压VGS的关系1)由JFET的工作原理,从理论上可推导得ID、VDS、VGS之间的关系为:式中:由(1)式可得跨... 相似文献
6.
LuShan ZhangXiaoning XiaZhonghao LiuZhili 《南京大学学报(自然科学版)》1998,(2):129-131
RIBONUCLEASEACTIVITYOFDUNALIELLASALINA(CHLOROPHYTA)UNDERHYPEROSMOTICSHOCKSLuShan△ZhangXiaoningXiaZhonghaoLiuZhili(Departmento... 相似文献
7.
分析了实现ATM网中话音通信的各项技术的特点,指出了宽带终端(B-TE)实现话音通信应具有的功能。对B-TE中适配层的选择、信元打包策略和定时信号的传输方案进行了分析与讨论,建立了B-TE话音通信功能模型。讨论了网络互通单元(IWU)的信令传输方式,交换虚通道(SVC)或永久虚通道(PVC)两种ATM网连接IWU的方案,分析建立了IWU的协议模型和功能结构模型,分析表明采用PVC可以避免在网络中设 相似文献
8.
龚礼宾 《西华师范大学学报(哲学社会科学版)》1994,15(2):197-200
关于自然坐标系符号问题的讨论龚礼宾(内江师专内江64100)SOMECONSIDERATIONSABOUTTHESIGNSINTHENATURALCOORDINATEGongLibin(NeejiangTeachersCollege,Neijiang... 相似文献
9.
THERISEANDDECLINEOFTHEUNITEDSTATESSHIPPINGANDSHIPBUILDINGINDUSTRIES¥(CaptainJamesS.C.Chao,DCS,LL.D.JohnJ.Clark,Ph.D.)Abstract... 相似文献
10.
拟环中幂等元和半幂等元W.B.VasanthaKandasamy(DepartmentofMathematicsIndianInstituteofTechnologyMadras-600036,India)IDEMPOTENTSANDSEMI-IDE... 相似文献
11.
Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness. 相似文献
12.
Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women's language from these perspectives: pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women's language, more attention should be paid to language use in social context. What's more, the linguistic phenomena in a speaking community can be understood more thoroughly. 相似文献
13.
理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。 相似文献
14.
As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death. 相似文献
15.
Miao Maosheng 《华南师范大学学报(自然科学版)》2014,(6)
正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula- 相似文献
16.
Yang Weitao 《华南师范大学学报(自然科学版)》2014,46(6):137-138
We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re- 相似文献
17.
Bernard Kirtman 《华南师范大学学报(自然科学版)》2014,(6)
正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that 相似文献
18.
Michael Springborg 《华南师范大学学报(自然科学版)》2014,(6):136
For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the 相似文献
19.
《上海师范大学学报(自然科学版)》2014,(5):550
<正>"The Journal of Shanghai Normal University:Mathematics"is published by Shanghai Normal University as regular issues of The Journal of Shanghai Normal University each year from 2014 in English.The editors-in-chief of the issues are professors Yuhao Cong and Maoan Han.The Journal of Shanghai Normal University was started in 1958 with 相似文献