The Unified Representation of Interface Conditionsof Electromagnetic Quantities Using Exterior Differential Forms

A continuity condition of p-forms across a p-dimensional submanifold isderived.The,various interface conditions of electromagnetic quantities are obtained through theapplication of the continuity condition to Minkowski manifold of space-time.     

The Application of Complementary Variational Principles in Sinusiodal Electromagnetic Field

Considering the need in practical applications the authors extend thecomplementary variational principles from single-medium to multi-medium. The equivalencebetween variational problems and multi-region boundary value problems is proved,Utilizing theextended functional and complementary functional,we construct the complementary variationalproblem in a sinusoidal el ectromagnetic field.Several special forms in computating differentsinusoidal electromagnetic field problems are given.     

The Calculation of Electromagnetic Fields in Sapce Around Lightning Path

This thesis studies mathematical model for calculating electromagnetic fields in space around lightning path.The calculating method which can more exactly calculate the distribution of electrocmagnetic fields in space around lightning path is developed.The results are consistent with results of refereces and simulating test.It supplies references for interference protection desigh of electronics such as computers ect.     

药食同源莲子的应用研究进展

莲子营养价值丰富,既可药用又可食用,为"药食同源"产品之一。自古以来,莲子都是人们喜爱的滋补品,不仅补益效果佳、来源方便,还可以根据不同的搭配制作出多种类型的莲子保健产品。随着研究的深入,莲子的应用范围日益广泛,已渗透到中医药、保健食品开发、日化用品研发中,且市场开发前景巨大。     

陕西农业科技成果转化应用的现状与思考

改革开放以来,陕西农业科技成果转化应用取得了长足发展,但也存在着农业科技成果转化率低、资金投入不足、体制落后、队伍不稳、农民文化素质较低等诸多问题。在综合分析发展机遇和面临矛盾的基础上,提出了建立科学合理的政策法律保障体系、坚实的农业科技创新基础、多元化的农业科技推广体系、高效灵活的运行机制、以国家投入为主的多渠道投融资体系和精干高效的农业科技推广队伍等对策和建议。     

黄土高原小杂粮降水生产潜力开发和增进的技术途径

在黄土高原,水资源已成为对粮食生产的主要制约因素。现阶段高原旱作农区农田降水利用效率仅为35%左右,研究表明在较为合理的生产条件用水效率可以达到70%~80%。在此,通过从提高种群的内在生产力、建设基本农田控制坡耕地水分的径流输出、抑制农田水分的无谓损耗、实施农田水分的空间富集、确立与降水分布相吻合的种植结构几方面阐述黄土高原小杂粮作物降水生产潜力开发和增进的技术途径。     

青稞HvBADH1基因的克隆及其转化烟草的初步研究

应用RT-PCR结合RACE技术, 从青稞总RNA中扩增得长度为1 512 bp的甜菜碱醛脱氢酶(BADH)基因cDNA全长编码序列。通过氨基酸同源性比对, 发现该序列的推定表达产物与大麦BADH同工酶BBD2的同源性为98.4%, 而与小麦、玉米和水稻等禾本科作物的BADH同源性分别为97.0%、84.7%和85.1%。将克隆到的青稞cDNA序列命名为HvBADH1, 投递到GenBank, 获得收录号EF492983。HvBADH1可以在原核表达系统TB1-pMAL c2x中正常表达出分子量为54.2 kD的多肽链。将HvBADH1的编码ORF, 插入到添加了植物表达CaMV 35S启动子和Nos polyA终止子调控元件的植物表达载体pCAMBIA1301质粒相应的克隆位点中, 构建了HvBADH1基因的农杆菌植物转化系统LBA4404(pCAM-ba)。进而采用农杆菌介导法, 将HvBADH1基因导入烟草中, 对所获得的潮霉素抗性烟草株系进行PCR、Southern blot和RT-PCR等分子生物学检测, 结果表明, 在得到的2个转基因株系中, HvBADH1基因已整合到受体植物基因组中, 并且可以在mRNA水平上进行转录。     

适于基因枪转化的棉花茎尖培养及筛选体系初探

将棉花种仁无菌培养40～60h,制备茎尖分生组织,培养在无激素MSB培养基上,直接再生完整植株。植株再生率与品种基因型差异较小,与再生培养基的成分相关。棉花茎尖分生组织制备的优劣与基因枪转化率密切相关。筛选培养过程中,卡那霉素的起始时间和浓度梯度等因素对转化率有直接影响。还描述了非转化植株的表现,探讨了抗生素最高筛选压的确定等问题。     

Thermodynamic Condition of Water Evaporation and Diffusion in the Convective Drying Process

On the base of non equilibrium thermodynamic theory and phase equilibrium principle, the physical mechanism of surface water evaporation and vapor diffusion is analyzed in the convective drying of porous material, and the thermodynamic condition of convective drying process is established. A new driving potential of water evaporation and vapor diffusion is set up and the effect of the drying medium temperature and humidity on the driving potential is discussed.     

Origin of Sv Genome of Aegilops variabilis and Utilization of the Sv as Analyser of the S Genome of the Aegilops Species in the Sitopsis Section

Hybrids of Aegilops variabilis (2n = 28, UUS^vS^v) with the low-pairing type lines of Ae. longissima, Ae. bicornis, Ae. searsii, Ae. speltoides and Ae. umbellulata were obtained. This is the first report of successful hybridization between Ae. variabilis and Ae. searsii. Meiotic analysis of these hybrids showed that the U genome of Ae. variabilis donated by Ae. umbelltilata remained nearly unchanged and Ae. longissima is the possible donor species of the S genome to Ae. variabilis. But the S^v genome and the S¹ genome of Ae. longissima are not completely homologous and are structurally differentiated by at least one interchange. According to their levels of homology with S^v through the means of chromosome associations, the four genomes of Sitopsis section species can be classified as follow: S^v? S¹ > S^b > S^s > S. The meiotic behaviour of the hybrids between the wheat ‘Chinese Spring’ and the four Sitopsis section species studied has not supported the view that one of the four species is the donor of the B genome of wheat.     

组织培养、分子标记和QTL技术在青花菜育种中的应用

育种是优异种质资源基因的重组。除传统新种质产生的方法外,通过组织培养、分子标记等技术来扩大物种的遗传基础已成为新种质资源形成的重要手段。青花菜,芸薹属甘蓝中以绿色花球为食用器官的一个变种,近年来在中国的种植面积越来越大,利用现代生物技术手段进行青花菜育种研究工作也越来越受到关注和重视。本文综述了游离小孢子培养、原生质体融合和转基因技术在青花菜种质资源创制中的应用,分析了各种方法存在的问题,并对青花菜遗传图谱构建、花球相关农艺性状及抗病性QTL/基因定位研究进行了探讨,并对其未来研究方向做了展望。     

W/O/W型多重乳状液的稳定性及其在食品加工中的研究应用进展

W/O/W多重乳状液具有优良的应用特性,但是其稳定性受多种因素的影响。综述了乳化剂、相比、黏度等物理化学因素和乳化工艺对W/O/W型多重乳状液稳定性的影响,介绍了W/O/W型多重乳状液在缓释、微胶囊和作为脂肪替代品方面的应用。     

The Application of Fuzzy Neural Network in the Detection for Moving Object

A fuzzy neural network(FNN) of detection for moving object based on BP algorithm is described in this paper.The correctness of the FNN in signal detection for moving object and fault diagnosis for instrument is proved by experiments.     

蔷薇科甜茶加工应用研究进展

蔷薇科甜茶营养丰富,含有甜茶甙、多酚、黄酮等多种活性物质。总结了蔷薇科甜茶的加工应用状况,为蔷薇科甜茶的进一步加工应用和市场开发提供参考。     

Study of the Correlation between the Transformation of PHB and Denitrifying Phosphorus Absorption in A/ASBR

By the study of the influence of COD concentration on denitrifying phosphor removal of A/ASBR (anaerobic/ aerobic sequence bioreactor), it was shown that the favorable treatment effect had been gained with the COD concentration between 220 and 300mg/l; the higher or lower concentration of COD was unfavorable to the work of the system. In our test, it has been confirmed that the rudimental carbon resource organism and cell depositor PHB deposited in anaerobic stage has a significant influence on the process of denitrifying phosphorous removal. The better correlation has been observed also between the consumption of PHB and denitrifying phosphorous removal when the use of cell depositors PHB as carbon resource is concerned. It indicates that the deoxidization of 2 mg nitrate may accelerate the absorption of 1 mg phosphorous.     

The Application of the Theory of 40 Hz EEG in the Stady of Chaotic States of EEG Signals

In this paper,the theory of 40 Hz EEG bursts is firstly used to judge whether thesubjects cooperate with us or not,and to determine the segments which can be processed for the studyof chaotic states of EEG signals.The theory,the realization of detecting method and the practiceapplication of 40 Hz EEG bursts are studied.     

聊城市耕地生产潜力及人口承载力研究

为了弄清聊城市耕地生产潜力,进一步提高耕地产出率,笔者运用潜力递减法计算聊城市耕地生产潜力,通过分析未来聊城市耕地面积、粮经比和主要作物播种面积,探讨聊城市耕地资源人口承载力问题。研究结果表明：聊城市小麦生产潜力为6911.37 kg/hm2、玉米为15445.88 kg/hm2;人口承载力在温饱型、小康型、富裕型水平上分别为938.25万人、750.6万人和625.5万人,这表明在富裕型水平上将出现超载。为此,笔者提出了提高聊城市耕地资源人口承载力的途径。     

农大108和晋单34光合特性与 产量关系比较分析

摘要：试验采用单因素随机区组试验,研究了晋单34和农大108生长发育的各个指标,以及影响产量的产量构成因素。得出以下结论：晋单34号的见展叶与光合势等指标低于农大108,产量构成因素（穗数、穗重、穗粒数、百粒重等）低于农大108,耐密性与抗倒伏性,且稳定性均比农大108差     

The Effect of Chilling Maize Shoots and Roots on the Electric Potential, Composition of Fatty Acids and the ATPase Activity in the Non-chilled Organs of Seedlings

The effect of separate chilling (5°C for 2 and 4 days) on the shoots and roots of two maize hybrid seedlings on the electric potential, the composition of fatty acids and the ATPase activity in the microsomes of non-chilled leaves and roots (20°C) was investigated. It has been found that the low temperatures induced on the non-chilled organs gave similar changes to organs exposed to a reduced temperature. The changes consisted of a parallel depolarization of leaf and root membranes and similarly a decrease in the ATPase activity as well as changes in the unsaturation of the membranes' fatty acids. The reduction of the acid content 18:2 was particularly significant, which in the leaf microsomes correlated with a drop in the ATPase activity.
The similarity between the reactions of the chilled and non-chilled parts of the plant gives evidence of a communication' between the organs which may facilitate a coordinated reaction of the entire organism to stress. The background for these phenomena could be die action potential of die chilled parts of seedlings which, in the non-chilled parts, might produce changes in the structure of biomembranes and in the activity of enzymes.