正交空时分组码最大比率合并接收组合形式的配方方法

该文研究了寻找正交空时分组码输出信号最大比率合并组合形式的配方方法,证明了一般正交空时分组码都可以采用配方的方法得到最大接收比率的组合形式。由于正交性,各输出支路可以独立地进行极小距离判决译码,其译码性能与用从各接收天线得到的接收矢量直接进行极大似然译码的性能完全相同,而译码复杂度却大为降低。

测土配方施肥中的配方方法

配方施肥的方法有目标产量法(又称养分平衡法)、地力差减法和土壤养分有效校正系数法等方法。目标产量法是国内外研究配方施肥的重要方法之一,这一方法是根据一定目标产量(或计划产量)来确定肥料施用量,具体应用公式进行计算,由目标产量、农作物单位产量需肥量、土壤供肥量、肥料利用率等重要参数计算施肥量。在配方施肥实践中,为了解决土壤供肥量测定问题,又分为地力差减法和土壤有效养分校正系数法2种方法。

利用有效营养浓度范围进行饲料配方的方法研究

在评价通常使用的配方方法的基础上 ,介绍了一种利用有效营养浓度范围进行动物饲料配方的方法 ,从而充分保证了饲料营养成分的平衡、非大宗饲料原料的最佳用量及其之间的比例 ,克服了通常的配方方法的不足。主要对本方法的概念、主要依据及计算步骤进行了介绍 ,也指出了本方法的优缺点。

GEL的配方设计方法

介绍了配方设计的基本方法。研究了成膜剂的中和度、用量,溶剂和其它添加剂对产品的影响。

世界增强药物溶解度的合理配方选择的新方法开发应用新进展

目的:探索增强药物溶解度的合理配方选择的新方法。方法:采用喷雾干燥的非结晶分散体,基于脂质的制剂技术。结果:如果原料药具有较差的脂溶性,则排除脂质制剂。如果相同的原料药也具有较低的热稳定性,也可不选择热熔挤出(HME)。粒径减小,微粒包衣和喷雾干燥仍然是可能的。如果原料药在普通有机溶剂中具有可接受的溶解度,则喷雾干燥和微粒包是有吸引力的选择。如果原料药剂量较高,则微粒包衣是不利的,而喷雾干燥是最佳的选择。结论:喷雾干燥非结晶分散体和基于脂质的制剂技术可应用于增强药物溶解度的合理配方选择。

常见无机氧化还原反应方程式的配平方法初探

根据无机氧化还原反应类型不同,如何书写氧化还原反应得失电子方程式及确定方程式中的原子个数;如何依据氧化还原得失电子方程式求出最小公倍数、基本系数;如何依据反应类型不同直接判定所求出的基本系数是生成物分子前面的配平系数还是反应物分子前面的配平系数,从而做到准确、快速的配平提出粗浅看法。

测土配方施肥对玉米养分吸收量的影响

随着时代的发展,其他产业得到了迅速的发展,但是农业依然是我国的基础产业,农业的发展情况决定了我国的经济发展。因此,需要加大对于农业的研究,提升农业的技术水平,提升农业的发展速度。而在农业的种植中,玉米是其中重要的一个部分,进行年来,我国的玉米种植得到了不断的发展,然而在玉米的种植中,通常采用的是普通的施肥方式,在就导致在给玉米植株施肥时出现了很多的问题,玉米植株对于肥料的吸收程度很低,导致玉米的生长速度受到了一定的影响。因此,测土配方施肥方法开始逐渐应用在玉米植株的施肥过程中。通过一系列的实验表明,通过测土配方施肥方法施肥的玉米植株中,氮元素、磷元素和钾元素的含量要远远高于普通施肥的玉米植株。这表明测土配方施肥方法有助于玉米植株对于肥料中养分的吸收,有助于玉米植株的增长,提升了玉米植株在单位面积内的产量。

高寒山区水稻科学施肥的原则和方法

该文介绍了霍山县高寒山区水稻土的特点,水稻土养分的基本状况,并提出水稻土科学施肥配方的原则和施肥方法。

THE ACCURACY COMPARISON BETWEEN CHEBYSHEV-τ METHOD AND CHEBYSHEV COLLOCATION METHOD

This paper is devoted to investigate the accuracy of the Pseudo spectral scheme with the Chebyshev tau method and Chebyshev collocation method. The computational results of the nonlinear disturbance development in plane Poiseuille flow for both methods are presented and compared in detail. It is acknowledged that the Chebyshev collocation method has higher precision than the other one, especially for near netural situation.

古代防火材料之研究

本文对古代建筑防火材料进行了分析研究，特别是对元朝著名在学家王祯关于法制油泥灰的配方和使用方法作了详细介绍；对古建筑中常用的构木做了燃点和燃烧速率的实验，这些对当今现代建筑中的防火材料研究是一种提示和借鉴。

五味姜加工技术

先将鲜生姜洗净去皮,用清水冲一下,然后一层生姜一层盐码放在缸中。50公斤去皮生姜大约放盐15～17.5公斤,再灌凉开水。盐遇水后会朝下层浸透,因此放盐时下面少放一些,上面多放一些。

The Pole Placement of a Singular System with Delay

This paper deals with the pole placement of the singular system Ex=Ax（t）＋Dx（t-τ）＋Bu,y=yx,where x ∈ R^n, u ∈ R^m, and y ∈ R^n are its state, control input and measure output respectively; E, A ∈ R^n×n, B ∈ R^n×m, and C ∈ R^r×n are constant matrices. It is also assumed that rankE 〈 n. The results generalize the results of [1].

Identification of a Putative Tetrasporophyte-Specific Gene in Gracilaria lemaneiformis(Gracilariales,Rhodophyte)

A putative tetrasporophyte-specific gene,designated as SSH466(GenBank accession No. DQ019223) ,was one of the genes identified in this work using suppression subtractive hybridization(SSH) method in Gracilaria lemaneiformis. The full length of the gene was obtained using SMART RACE strategy. Sequence analysis revealed that the gene had 1 019 nucleotides,including an open reading frame of 498 nucleotides encoding 166 amino acid residues,158 nucleotides of 5' untranslated region and 363 nucleotides of 3' non-coding region. Protein motif and secondary structure prediction showed that there existed a transmembrane domain with a unique β-sheet. Thus,SSH466 protein might be a cross-membrane protein. Sequence homology search in the public GenBank databases did not reveal any significant match with SSH466. Virtual Northern blot analysis confirmed that it was a tetrasporophyte-specific gene.

Joint subcarrier and power allocation with threshold in cooperative multiuser networks

In this paper, we investigate a resource allocation issue in OFDMA-based decode-and-forward cooperative multiuser networks and propose joint subcarrier and power allocation schemes. The optimal solution of this combinable allocation shows high computational complexity, so we allocate subcarriers and power separately. At firstly, we distribute subcarriers to relays and users under the assumption of equal power distribution. Here, we propose an equal capacity increment （ECI） allocation strategy to achieve tradeoff between total throughput and fairness. To further improve the system performance, we introduce threshold into ECI strategy, named ECI strategy with threshold （ECI-T）, where subcarriers with bad performance are prevented from transmitting. Subsequently, a water-filling method is adopted to distribute the power to cooperative links in order to fully utilize the limited power. Simulation results show that system performance of the proposed schemes is significantly enhanced compared with an existing resource allocation scheme. Besides, the resource allocation schemes with the water- filling method notably outperform schemes with equal power allocation.

Uncalibrated visual servoing design for competitive networked robots

In this paper,a method with an eye-in-hand configuration is developed to hit targets during visual tracking for the TLS(Tele-Light Saber) game.It is not necessary to calibrate camera parameters and predict the trajectory of the moving object.Firstly,the expression of the image Jacobian matrix for the eye-in-hand configuration is proposed,and then an update law is designed to estimate the image Jacobian online.Furthermore,a control scheme is presented and the Lyapunov method is employed to prove asymptotic convergence of image errors.No assumption for the moving objects is needed.Finally,both simulation and experimental results are shown to support the approach in this paper.

A review on pharmacological effects of Rhizoma Coptidis(Huang lian)

Huang Lian(Rhizoma coptidis, RC), which has effects on clearing damp-heat, quenching fie, and counteracting poison, is a herb frequently used in many traditional formulas. At present, there are many researches on the pharmacological effects of RC. In this review, we summarize the research progress on pharmacological effects of RC from four main aspects, in order to guide clinical application and explore the prospects of the application of RC.

Robust Blind Separation for MIMO Systems against Channel Mismatch Using Second-Order Cone Programming

To improve the deteriorated capacity gain and source recovery performance due to channel mismatch problem,this paper reports a research about blind separation method against channel mismatch in multiple-input multiple-output(MIMO) systems.The channel mismatch problem can be described as a channel with bounded fluctuant errors due to channel distortion or channel estimation errors.The problem of blind signal separation/extraction with channel mismatch is formulated as a cost function of blind source separation(BSS) subject to the second-order cone constraint,which can be called as second-order cone programing optimization problem.Then the resulting cost function is solved by approximate negentropy maximization using quasi-Newton iterative methods for blind separation/extraction source signals.Theoretical analysis demonstrates that the proposed algorithm has low computational complexity and improved performance advantages.Simulation results verify that the capacity gain and bit error rate(BER) performance of the proposed blind separation method is superior to those of the existing methods in MIMO systems with channel mismatch problem.