关于区间直觉模糊多属性群决策中专家意见一致度的集结

本文首先给出了区间直觉模糊距离的定义,并在此基础上,提出了一种集结区间直觉模糊多属性群决策中专家个人意见的一致度的新方法.最后,给以实例用来说明此方法的具体应用.

Abstract：

The concept of interval-valued intuitionistic fuzzy distance is defined. Based on this definition, a new method for solving the problem of consensus degree aggregation of experts' opinions in the multi-attribute group decision-making is proposed. Finally, a numerical example is given to show how to apply this method.     

平衡与不动点问题的强收敛定理

在Hilbert空间中用粘性逼近的方法引入了一个关于平衡问题与不动点问题的混合迭代格式,并证明了由此迭代格式导出的序列强收敛到平衡问题解集与有限个非扩张映射公共不动点集的一个公共元.

Abstract：

The aim of this paper is to introduce a new general composite iterative scheme by visosity approximation method in a Hilbert space and to prove that the sequence generated by the iterative scheme converges strongly to a common point of the set of solutions of an equilibrium problem and the set of fixed points of a finite family of nonexpansive mappings.     

两相非等节距时栅传感器的谐波修正

采用误差修正是提高两相非等节距时栅位移传感器精度的有效方法.首先,详细研究了两相非等节距时栅传感器的原理和误差组成,分析了长周期误差、短周期误差等误差特性.其次,提出了一种新型的谐波误差修正方法,它可以同时消除长周期误差和短周期误差,且不要求等间距采样,采样点数少,数据处理简单.最后.,通过实验表明,该方法能大大提高传感器的精度.

Abstract：

Error correction is an effective way to improve the accuracy of two-phase unequal-pitch time-grating displacement sensors.This paper introduces the principle of the two-phase unequal-pitch time-grat-ing displacement sensor and the composition of its errors and analyzes the features of long-period errors and short-period errors.Based on such analyses, a new harmonic error correcting method is proposed, which can simultaneously eliminate long-period errors and short-period errors and does not require equidis-tant sampling.Compared with the traditional harmonic error correcting methods, this method is character-ized by few sample points and simple data processing.Applied in an experiment, this method was shown to be able to enhance the accuracy of the sensor greatly.     

Transfer and Detection of barstarGene to Maize Inbred Line 18-599 （White） by Particle Bombardment

In China, the purity of maize hybrid strain is discomforting to the development of seed industrialization. Finding a new method for reproduction of maize hybrid strain is necessary. In this study, using particle bombardment, barstar gene was transferred into maize inbred line 18-599 （White）, which is an antiviral and high quality maize inbred line. By molecular detection of the anther of transgenic maize, two plants transferred with barstar gene were gained in this study, which are two restorer lines. The two plants showed normal male spike, and lively microspores. But the capacity of the two restorer lines should be studied in the future. The aim of this study is to find a new method of reproduction of maize hybrid strain using engineering restorer lines and engineering sterility lines by gene engineering technology.     

无限群的π-拟Frattini子群

研究了一种新的类型的子群类,即π-拟Frattini子群,给出了它的定义以及相关性质.

Abstract：

The object of this paper is to introduce a new canonical subgroup, the π near Frattini subgroup, defined for all members of some relatively large classes of groups. Its definition is given and its properties are investigated.     

关于极大子群的θ*-偶

主要利用θ*-偶来研究群G的结构,得到了有限群可解和超可解的一些新的描述.

Abstract：

The purpose of this paper is to investigate the structure of a finite group G by using the concept of the θ*-pair.Some new characterizations of a finite group being solvable or super-solvable are obtained.     

B92协议的改进与数字签名

对量子密钥分配的B92协议做了一些改进,即通过令发信方Alice故意公布一些假的测量基提高诱使窃听者Eve现身的概率并基于改进的B92协议和RSA加密体制提出了一种双向认证签名方案.

Abstract：

An improvement of B92 quantum key distribution protocol is proposed in this paper. The main idea is to find secret listeners more easily from a trap of the quantum channel by some false basis the sender has inserted. Based on the quantum key distribution protocol of B92 and the RSA public-key cipher system, a new dual safekeeping and mutually authenticated digital signature scheme is constructed.     

超导高梯度磁分离造纸厂污水处理

分析了超导高梯度磁分离污水处理技术的基本原理,介绍了超导高梯度磁分离技术在纸厂污水处理中的应用及设备,讨论了利用等离子体聚合薄膜制备具有强捕捉能力磁性粒子的工艺.

Abstract：

Superconducting magnetic separation is a new candidate method for purifying wastewater produced by paper factories owing to its compactness in volume and effectiveness in treatment. In this paper,the principles of wastewater purification with superconducting high gradient magnetic separation are analyzed, its usage and equipment in wastewater purifying factories are presented and the process of preparation of the magnetic particles having high scavenging capabilities with plasma polymerization polymer thin film is described.     

基于稀疏分解的自适应数字锁定放大器微弱信号检测方法

提出了一种利用软件算法来自适应地实现数字锁定放大器的微弱正弦信号的检测,即利用稀疏分解的匹配追踪算法来实现这种检测方法.将稀疏分解中原子库的原子(即具有随机性的频率和初始相位的正弦波)作为参考信号,利用匹配追踪算法来搜索原子库(由多个原子组成)中的最优原子-即与输入有用信号最匹配相干的原子并可以得到该最优原子的幅度,由该最优原子的幅度、频率和初始相位信息就可以估计得到输入有用信号的对应参数,从而检测估计出输入信号中的有用正弦信号.该方法无需人工调节参考信号的幅度、频率和初始相位,只需修改算法中的某些参数即可实现微弱信号检测,在应用中就会更加方便、灵活.计算机模拟表明,可以精确地检测出带噪信号中有用的正弦信号和调幅AM信号,并且在-40 dB以下极低信噪比环境下还可以同时检测出多个被强噪声淹没的有用正弦信号.

Abstract：

The paper proposes a method which realizes adaptively weak sinusoidal signal detection of digital lock-in amplifier by software algorithm.The detection method is realized by matching pursuit(MP)algorithm of sparse decomposition.In the method,an atom of atoms of MP algorithm is a reference signal,and the atom is a sinusoidal wave which possesses random frequency and the initial phase,then it uses MP algorithm to search the optimal atom of atoms and obtains its amplitude,that is to say,the optimal atom is the atom of most matching correlation with a useful input signal,so it can estimate the corresponding parameters of the useful input signal through the messages of amplitude,frequency and the initial phase of the optimal atom and detect useful sinusoidal signal of the input one.With this method,it is not necessary to manually adjust the amplitude,frequency and the initial phase of the reference signal,and what is needed is only to modify some parameters of the algorithm to realize detection of weak signals.It is more convenient and flexible in the application.Computer simulation showed that this method can accurately detect useful sinusoidal signals and AM signals of the noise signals and it can detect multiple useful sinusoidal signals in a strong noise environment of the very low SNR of-40 dB.     

三维扩散方程基于Richardson外推法的高阶紧致差分方法

基于Richardson外推法提出了一种求解三维扩散方程的高阶紧致差分方法.该方法首先利用截断误差为O(τ2+h4)的四阶紧致交替方向隐式(ADI)差分格式在不同尺寸的网格上对原方程进行求解,然后利用Richardson外推技术外推一次,得到了三维扩散方程具有O(τ4+h6)精度的数值解.数值实验验证了该方法的高阶精度及有效性.

Abstract：

A high-order compact difference method based on the Richardson extrapolation technique is proposed to solve the unsteady three-dimensional diffusion equations. For a particular implementation, firstly, numerical results are obtained on meshes of different sizes using a high order alternating direction implicit (ADI) difference scheme, which are fourth order in space and second order in time. Then, the Richardson extrapolation method is used to get an accuracy solution for three-dimensional problems, which is six order in space and fourth order in time. Numerical experiments are made to demonstrate the high accuracy and validity of this method.