A Logistical Discounted Model

Developing logistic based on e-commerce has been a hot point in the logistical field ,but putting the e-commerce logistic into reality still need further research .This paper suggests a logistical discount model. This model was directed by the ideal of logistic integration .The transportation discount was taken as a main instrument to reflect this idea. This model can be adopted by the fourth logistical company which want to make a profit from e-commerce logistic. After an analysis, the author gives an algorithm about the model.     

抗TMV感染物质——板蓝根

用局部枯斑法测得,板蓝根(Isatis indigctica Fort.)水浸液对烟草花叶病毒(TMV)侵染心叶烟有明显的抑制作用,抑制率在80%以上.温室盆栽试验证明10倍和100倍液能够阻止TMV对甜椒(同丰37)的感染,推迟植株发病,受害程度减轻.     

A CLASS OF SINGULAR CAUCHY PROBLEM FOR A QUASILINEAR HYPERBOLIC EQUATION

This paper studies a class of singular Cauchy problem for aquasilinear hyperbolic equation and shows that there exists a uniquely stablesolution by quasi-differential operators.     

A Non-linear Circuit Model of A Self Scanned Photodiode Array Image Sensor

A non-linear circuit model of photodiode built according to the working principle of self-scanned photodiode array image sensor is presented for improving the property of the sensor. Through the analysis of the non_linear circuit model,we get the state equations, and the equations are resolved with Runge_Kutta algorithm. The Runge_Kutta algorithm is realized in C language, and the numeric result of the circuit is obtained. The analysis of the numeric result of the model shows that the non_linear performance of the sensor can be improved by reducing the capcitor of the PN junction and the dynamic performance of the image sensor can be enhanced by paralleling capacitor C M , and all the analysis is consistent with the real measurement results of the sensor. The circuit model of photodiode is improved over previous model.     

高粱A_1、A_2型核质互作雄性不育性遗传的初步研究

本试验表明,A_1型雄性不育性是由细胞质不育基因S_1与核内两对隐性不育基因ms_1ms_1 ms_2ms_2共同控制.A_2型雄性不育性是由细胞质不育基因S_2与核内一对隐性不育基因ms_2ms_2共同控制.相对的显性恢复基因MS_1MS_1 MS_2MS_2是独立遗传的,不存在累加效应,两对显性基因都与S_1存在互作关系,只要有其中一对就可实现对A_1细胞质不育系的恢复.A_2细胞质雄性不育系则只有MS_2MS_2基因才能恢复.MS_1MS_1基因在A_2细胞质遗传背景下失去了显性恢复作用,成为S_2的非互作基因.雄性不育的核质互作具有普遍性和对应性,保持系则具有多样性.     

A Fast Median Filtering Algorithm

A fast median filtering algorithm basing on the coherence of data in adjacent windows is presented.During median filtering,only the first median value is found by conventional squencing algorithm,the other median values are obtained by bisecting search method and quickinserting new element in sequenced window.For convenience of moving filter window along signal data,a data structure is desinged,which can make the new input element to cover output element and greatly reduce the quantity of computation.A 2-dimensional fast median filtering method by moving filter window along snack path is also introduced.     

A mutant annual cabbage

An annual-flowering cabbage, the result of mutation, occurred in 1956 among heading plants of the Morden Midget variety. Monogenic dominance for the annual character was indicated by an inheritance test. The classification of annual and normal type progeny plants from the annual × Morden Midget cross used in the test, was complicated by biennial growth factors. The time of flowering varied markedly among annual plants. Also, the ability to set seed in the field varied in the early flowering group. In a large proportion of plants, fertility increased as daylength decreased in autumn, indicating a probable seasonal improvement in self- and cross-compatibility Some plant forms among the annual plants resembled sprouting broccoli.Contribution 33, Research Branch, Canada Agriculture Experimental Farm, Morden, Manitoba     

优质抗病西瓜新品种京抗2号的选育

京抗２号是在广泛搜集抗源材料及品质优良的种质材料的基础上，用具有目标性状的材料，通过杂交、复合杂交、回交等手段进行抗病基因转育，达到基因重组。从各杂交、回交后代分离群体中，通过多代抗病鉴定筛选及经济性状选择，选育出既抗病又优质的亲本材料。通过配合力选择，品种比较试验和生产鉴定，最终获得优质、抗病的西瓜一代杂种。该品种抗病性强，兼抗枯萎病及炭疽病，果实美观，品质优良，果皮坚韧，耐运输，且具丰产性。     

A CONSTITUTIVE FUNCTION FOR A NONLINEAR ANALYSIS OF STRUCTURES OF LINEAR ELEMENTS

In this paper, a constitutive function in form of integration is presented for a nonlinear analysis of structures of linear elements. With applications of a constitutive function, the truss and frame elements material nonlinear stiffness equations are derived. The results shows the convenience in numerical analysis and the ability to solve some difficult problems in tn the structural behavior study both in loading and unloading process by use of the presented constitutive function.     

A SELF-TUNING CONTROL FOR A PARALLEL AC/DC POWER SYSTEM

Based on a non-linear system model, an adaptive control methodology is presented for a parallel AC/DC power system by means of on-line recursive parameter identifications. Taking the advantage of rapid power regulatiing ability of the DC power system and combining with the generalized minimum variance self-tuning control principles, the dynamic qualities of the controlled system has been greatly improved. Using SISO form makes the control system very simple to implement. Through the design, simulation and analysis of the self-tuning control system for a practical example, it shows that the self-tuning control strategy is very promising for AC/DC power systems.     

A GENERALIZED WEBER-FECHNER LAW

This paper presents a generalized Weber-Feehner's Law.It shows that this law can be used in assessing lighting,acoustical andthermal environment of building.The room articulation funetion,the li-ghting clarity funtion and the thermal comfort function are derived fromthis law.The ealeulated results of these funetions are coincident withthe experimental data obtained by some famous researchers in the world.It can be thought to be a universal law.     

STUDY ON PRODUCING A RED CEMENT WITH RED CLAY AS A RAW MATERIAL

This paper studies the production of a red cement with red clay as a raw material.It is produced by a direct calcine method using red clay as a coloring agent and red slag as an additive agent,then mixing it with white cement.     

A NEN METHOD OF USING VECTOR-MATRIX TO SOLVING A DIMENSIONAL CHAIN IN PLANE

In this paper,a new method of using vector-matrix tosolving a dimensional chain in plane is presented.A mathematical modelis established by means of Rodrig's formula,and the computer programof this method is provided.It is more general and convenient than thegeometric calculation.The numerical calculation is presented in connec-tion with a practical example.The result is the same as that of geometricmethod.     

A NEW APPROACH OF OPTIMIZATION

In this paper, a necessary optimality condition of problems with equality constraints is investigated by the implicit function theorem in n-dimensional Euclidean space. A new approach solving these problems is obtained. The number of dimensions of corresponding system of equations is less than the classic Lagrangian multiplier method.     

A GmFAD3A mutation in the low linolenic acid soybean mutant C1640

The linolenic acid component is responsible for the flavour and odour instability of soybean oil. Thus, development of low linolenic acid soybean lines has been a major goal in crop science research. One such low linolenic acid soybean line, A5, contains a deletion of the omega‐3 fatty acid desaturase gene GmFAD3A. Another low linolenic acid soybean line, C1640, is allelic with A5, suggesting it too contains a mutation in the GmFAD3A gene. The purpose of this work was to characterize the genetic lesion in C1640 using GmFAD3A as a candidate gene. It could be that a premature stop codon is introduced in the gene, presumably rendering a non‐functional truncated enzyme. An assay to distinguish between the wild type and mutant alleles by using PCR followed by endonuclease digestion was developed. This assay will aid soybean breeders that are trying to incorporate the C1640 low linolenic acid trait into other lines.     

A Real-Time Controlling Model for Signiged-Intersections

This paper shows a scheme for intersection traffic real-time sign-controlling, by which the most optimized green-time can be achieved during a sign period. The optimized objection is traffic density. A loop-dector is requested for each approach,and the dynamic flow is simulated. So that it is possible for predicting the density disbrution during the next period. The model is characterized by real simulation and real-time.     

莲藕育种方法初探

莲藕是一种繁殖能力很强的植物。它可以采用无性繁殖──用芽繁地可以采用有性繁殖──用莲子繁殖。根据莲的繁殖的多样性及其繁殖器官上的特殊性，可以采用多种途径来进行莲藕品种的改良工作。（1）从自然混杂群体中单株东选育种。（2）从顶芽繁殖后代中选育。（3）从自然杂交莲子实生苗后代选育。（4）人工杂交选育新品系。由于莲藕采用人工杂交后，可以用无性繁殖方式，把杂交的优势固定下来，不需要多代自交纯化或者年年进行杂交制种，所以这将是一项行之有效的育种途径。文中并介绍了杂交后代F1代的性状表现，以及所选出的6个新品种（系）。     

A NEW FREQUENCY SYNTHESIS METHOD

A new frequency synthesis method is presented in this paper. Its fundamental ideology is that for any frequency needed to be output,the controller sends a different group of dividing numbers to the feedback programmable divider of PLL by means of a special algorithm so as to make the interference frequency at the output of the phase detector and the frequency resolution indeqendent from each other. Therefore,high resolution and wide bandwidth are achieved simultaneously.     

利用农杆菌介导法将反义Wx基因导入水稻的研究

利用根癌农杆菌将含多基因(hpt选择标记基因、反义Wx基因、GFP和GUS报告基因)的pCAMBIA1304载体导入水稻品种(501R、中花9号和日本晴)的幼胚愈伤组织,分别在含35mg/L、45mg/L和65mg/L潮霉素浓度的筛选培养基上筛选获得抗性愈伤。后经PCR检测,从415株T0代再生植株中选出92株(其中501R、中花9号和日本晴分别为4株、43株和45株)。对这些转基因后代植株进行Southern blotting分析表明：hpt、反义Wx基因已经整合进植物基因组中。绝大多数转基因植株后代的表型正常。成熟种子直链淀粉含量分析表明,部分转基因植株的T1代种子中的直链淀粉含量有不同程度的下降,最低的已下降至6．3％,与对照相比下降了9．8％。     

空气负离子的研究综述

本研究首先对空气负离子NAI(Negative air ion)的概念、功能作用、形成及其形成相关机理,以及NAI的测定方法和分级评价方法进行概述。然后通过对前人的相关研究进行归纳,总结得出NAI的日变化、季节变化和区域变化特征以及影响NAI浓度的因素,归纳总结这些研究结论的规律性。最后通过分析目前许多学者的研究,发现NAI的相关研究中还需要进一步解决的一些问题。