A MONTE CARLO APPROACH APPLIED TO THE ERROR ESTIMATION OF STANDARDLESS QUANTITATIVE PHASE ANALYSIS

A Monte Carlo approach is appplied to the error estimation and error analysis of X-ray diffraction standardless quantitative phase analysis and the coefficient of its variation is cal dilated .which is compared with the error estimation by the condition number of the coefficient matrix of linear equations. The Monte Carlo error estimation is applied to the standardless quantitative matrix-flushing method, in which the mixture of KC1. CaCO3. ZnO and BaCO3 is analyzed as an example.     

ERROR ANALYSIS OF MOSFET SWITCH TRANSMITTING AC SIGNALS

In this paper,the error caused by the resistance of theMOSFET switch in the transmission of AC signals is straightforwardly derivedin combination with MOSFET physical model.The method ot decreasing transm-issiv eerror is presented.     

THE METHOD OF THE MEASUREMENT OF THE WORMWHEEL PROFILE ERROR WITH THE THREE-COORDINATE-MEASURE-MACHINE

In this paper we explain the method of the measurement of the wormwheel profile error with the three coordinate measuring machine. We first establish the wormwheel theoritical tooth profile equation according to the gear engage principle, then write the computing program and calculate the wormwheel theoritical profile, next analyse and calculate the error of the gage head interference. At last, we work out the measuring program and get the wormwheel profile measured with the three-coordinate measuring machine.     

BOUNDARY ELEMENT METHODS AND ERROR ANALYSIS FOR THE SOLUTION OF ELLIPTIC NEUMANN PROBLEM IN R~2

This paper presents boundary element methods for the solution of elliptic partial differential equation with Neumann boundary problem in R~2. Total details of error analysis are given for general condition, and optimal estimates are obtained. For simplicity Laplace's equation is discussed in illustration.     

THE EXPERIMENTAL STUDY ON REAL-TIME HOLOGRAPHIC THREE WAVEFRONT INTERFEROMETER

Real-time holographic three wavefront interferometer combineing wavefront interference with holography has been proposed in this paper. The apparatus can be used for a number of pratical applications including the measurement of flatness for an optical flat. Thickness for transmissive or refective films. It has peculiar character comparing with other interferometers.     

THE CORRECTION TO THE DISTORTED IMAGE OF THE SCANNING TUNNELING MICROSCOPE

The reason of the STM image distortion is analyzed according to the principle of the Scanning Tunneling Microscope (STM). A physical and mathematical model is established and the numeral value solution is obtained by the computer. Finally,the STM distorted image is correctted with a satisfactory result.     

LABORATORY INVESTIGATION OF ESSENTIAL CHARACTERISTICS PARAMETERS FOR THE INDUCED-NOZZLE DEVICE

The standoff of a submerged jet is smaller than a non-submerged jet in general. In order to increase the standoff of a submerged jet, the induced-nozzle device is presented with its inducing mechanism analysed in this paper. Under the various inducing medium, the effect of the ratio d2/d1 upon the device's properties is measured. Some reasonable parameters are given. When d2/d1=2.0, approximate straight region of the curve of the jet center line stagnation pressure varying with the standoff is L/d1= l0~12 for inducing air. The induced-nozzle device is compared with the conventional nozzle for shotting some samples. Several applied possibilities of the device are discussed.     

INFORMATION THEORY COMBINATION FOR ERROR ANALYSIS OF. SAMPLING-QUANTIZATION FOR DIGITAL MEASUREMENT SYSTEMS

This paper presents a new error analysis method based on the information theory. The analyse results of error of a digital measurement system will be illustrated more reasonably. This method is defined information theory combination, it will overcome the unintention between the uncertainty and the standard error of measuring results by traditional error analysis. On the basis of error spectrum analysis of sampling and quantization, an optimum digital filtering method is also presented in this paper. Simulation and testing show that the method is more resultful.     

新引进高粱雄性不育系的配合力分析

按格子方法对新引进美国高梁不育系 Tx622A、Tx623A、Tx624A 等进行了主要农艺性状的配合力分析。不育系间穗粒重、穗粒数、生育期、株高、穗长、角质含量配合力差异显著,千粒重配合力差异不显著。在全部被研究性状的遗传控制中,加性基因效应占主导。除 Tx622A 外,其余新引不育系穗粒重,穗粒数的一般配合力效应优于3197A,全部     

陆地棉品种棉籽品质分析研究

测定了61个陆地棉品种的种籽品质。粗蛋白和粗脂肪之间为极显著负相关(r=-0.8921)。粗脂肪平均含量为34.777%,亚油酸平均含量为53.84%,二者之间为正相关,但不显著。粗蛋白、赖氨酸平均含量分别为40.308% 2.3687%,二者之间为极显著正相关(r=0.3477)。61个陆地棉品种中,赖氨酸及亚油酸含量均较高的品种有19个,其中邢台6871、中₇、皖_73-10,为中熟丰产品种;辽棉3号为早熟品种;SP₂₃、岱₅₅、布隆迪棉、岱₆₁、岱₄₁等,均可作为棉籽品质改良的亲本材料。棉籽仁是优质植物油脂及高蛋白食品和饲料的来源。它的不饱和脂肪酸占70%以上,亚油酸占50%以上;棉仁粉蛋白质含量高达50%以上。     

THE APPLICATION OF FUZZY AGGREGATION ANALYSIS TO THE CLASSIFICATION OF PLANT COMMUNITY

The subtropical evergreen broadleaved forest of the Jinyun Mountain Natural Reservation in Chongqing is studied the fuzzy aggregation analysis is applied to the partition of classificational unity. On the basis of strict computation, the dynamical graph of fuzzy aggregation is made and five formations are parlitioned.     

食用豆类种子蛋白研究初报

为比较食用豆类种子蛋白的品质,我们对红小豆(Phaseolus angularis)、绿豆(Phaseolus aureus)、豌豆(Pissum sativum)、蚕豆(Vicia faba)的种子蛋白含量及氨基酸组成进行了生化分析,并分别提取清蛋白、球蛋白、醇溶谷蛋白和谷蛋白,测定其蛋白质及氨基酸的含量。分析结果表明:食用豆类种子中,蛋白质的含量比禾谷类的高一倍左右     

THE ANALYSIS OF MECHANICAL CONSTRUCTION OF SURROUNDING ROCKS IN THE PITCHING SEAM

Defferent forms of mechanical construction, the distribution of stress, and the process of the deformation destruction in the enclosing rocks in a working face of a pitching seam are analyzed according to its geological and mining specialities.     

我国主要高粱杂交种的系谱分析

<正> 我国推广高粱杂交种已有廿余年的历史。现在剖析一下主要杂交种及其亲本的系谱,对确定今后选育的策略及方法不无裨益。我们依据《杂交高粱—选育—制种—栽培》和《优良杂交高粱组合及亲本》两书中提供的和近期可能收集到的资料,分析中国主要高粱杂交种及其亲本的系谱,并讨论有关的遗传基础宽度问题。     

小麦品种对赤霉病抗扩展类型抗性组分的探索分析

本文探索了一种较客观地反映小麦品种对赤霉病抗扩展性的方法——抗性组分分析法。对13个品种双列杂交的后代,按 Griffing 方法Ⅱ模式Ⅰ研究了6个抗性组分的配合力。结果表明:供试品种各抗性组分真实存在,不同抗病品种阻止病菌扩展的方式不同;主穗轴发病和田间接种后15及25天的病级这三个组分可作为衡量品种抗扩展性的主要指     

THE METHOD OF IMPROVING THE SPEED AND ACCURACY OF FFT AND SPECTRUM ANALYSIS

FFT(Fast Fourier Transform)is the basis of spectrum analysis. This paper gives out a method which can improve the speed and accuracy of FFT. The spectrum analysis based on the proposed method is of a high level: the amplitude error of spectrum is less then 1 % , the time of completing 1024 compler points FFT and 32 segments spectrum analysis is less then 250ms and only 5 seconds respectively.