Equalization charging research and application of lithium iron phosphate batteries group

Management system for Lithium iron phosphate(LiFePO4) power batteries group is built,based on car battery series charge features. Series charge experiment of power batteries group is carried out using battery charger. Single cell voltage and state of charge(SOC) is analyzed in series charge for batteries group. Dispersivity influence of single cell is studied on charge performance of the battery packs,small current supplementary charge equalization is proposed,to make single cell battery state of charge is basically almost the same. Theoretical analysis and experimental results show that single cell voltage difference is very large,but SOC difference is very small in the end of battery series charge. A novel battery packs charge equalization method is presented,which avoids the problem of some batteries overcharge and other batteries less chargedproblem.     

The Impact of State and Local Tax and Expenditure Limitations on State Economic Growth

Employing a unique index of Tax and Expenditure Limitation (TEL) restrictiveness, we estimate a family of economic growth models using a panel of the 50 U.S. states for the period 1969 to 2005. Our central goal is to assess the relationship between TEL restrictiveness and economic growth. Results suggest that stronger TELs imposed on state governments have a dampening effect on state economic growth and TELs imposed on local governments have a weak negative impact on growth. The results do not support the argument that legislatures can use tax and expenditure limits as a mechanism to promote economic growth.     

A Study on Chaotic State of EEG Signal

In this paper.the chaotic theory is described briefly and the chaotic state ofEEG on thinking are studied. In this study. the method of detecting short bursts of 40 Hz EEG ac-tivity is firstly usedto dedermine the segments to be computed for analysis of the chaotic state ofEEG. therefore the reliability and stability of the analysis results are assured In this paper.thechaotic para meters of qa n titative analysis are studied and more then 30 subjects EEG are analysedfor the value of the fractional dimension and the maximal Lyapunov exponent.The results of exper-iments indicate that the value of the fractional dimension is valuable for clincal diagnosis and themaximal Lyapunov exponent is not sufficient for dignosis of disease.     

Influence of genotype on phosphate uptake and utilization efficiencies in spring barley

To investigate the genetic variation of phosphate (P) uptake and P utilization efficiency, 24 high-yielding spring barley cultivars were grown in two pot experiments on a loess loam-sand mixture. In the first experiment, the plants grew until maturity under P stress (50% of the maximum yield), and in the second experiment, the plants grew until the stage of tillering (DC 25) at a low or at a high P supply.

At maturity, the range between cultivars with the highest and the lowest values were 30% for total dm yield (grain and straw), 28% for grain yield, 24% for P uptake efficiency (P in grain and straw), 26% for P concentration in grains and 24% for P utilization efficiency quotient PEQ (g dm grain per mg P in shoots) (mean of all cultivars = 100%). Grain yield was correlated with P uptake per plant, r = 0.71^***, and with PEQ, r = 0.60^**. Between P uptake and PEQ, there was only a weak relationship (r = −0.14). Therefore, a combination of high uptake efficiency and high PEQ in a cultivar may be possible.

At growth stage DC 25, the cultivars showed a significant variability in shoot biomass, P concentration, P removal, P influx, acitvity of acid phophatases (P_ase) and root length. The ranking of the cultivars, however, was very different at the two P levels, but the root-length and the P_ase activity were more influenced by genotype than by the P supply.

As the relationships between grain yield, P removal, PEQ and the characters of the young plants cultivated under P stress were very weak (r < 0.43), selection for P efficiency at the stage of tillering cannot be recommended.     

黔西南州玉米育种发展探讨

通过分析黔西南州现有玉米育种水平和现状,从育种目标的调整、育种材料的创新、育种方法扣育种技术的改进等方面进行探索,提出黔西南州玉米育种的方向,促进黔西南州玉米育种发展.     

Effect of the number of snapshots on the SINR of adaptive DBF system

In the most algorithms of adaptive DBF, the number of the snapshots used to estimate the covariance matrix decides the estimation error directly, and it also effects the SINR of the system. The relationship between the number of snapshots and SINR are present here with maximum likelihood estimation and spatial smoothing estimation algorithms, which is important for the system designer to take the fight number of snapshots.     

锌铁微肥对小麦良种的增产作用

在小麦高产栽培生产中，随着氮、磷、钾大量元素肥料施用量的不断增加，小麦产量也不断提高，对微量元素的需求就更为迫切。为了研究铁锌微肥在本所良繁基地上对小麦的增产效果，我们开展了本项试验，以期为小麦合理施用锌铁微肥提供依据。１材料与方法试验于２００１年在本所东坡良繁基地进行。土壤为粘质壤土，试验前测定的０～２０cm土壤养分为：有机质１．２５％、全氮０．１２％、速效磷３２mg／kg、速效钾１０４mg／kg、有效锌０．４６mg／kg、有效铁２．９１mg／kg。供试小麦品种为本所选育的豫麦２４，锌肥为硫酸锌，铁肥为硫酸亚铁…     

黄瓜种子生防菌引发处理研究现状

文章对目前黄瓜种子健康检测及消毒处理方法的研究现状进行了分析总结，概述了种子生物引发方法、引发条件和引发效应以及用于引发处理的生防菌的种类、生物引发的作用杌理以及引发机制，对种子生物引发研究和实际应用前景问题作了讨论。     

Multi-scale optical flow estimation of the video based on gradient optimization

A new algorithm based on gradient optimization is proposed for optical flow estimation of video images with different motion ranges. The original video images are transformed by using Loggabor filtering on phases and measures,and then the spatio-temporal gradient is calculated by using the obtained feature images. The optical flow is calculated with the spatio-temporal gradient. The video images are layered and processed with coarse-to-fine image pyramid method. The theoretical analysis and experimental results show that the algorithm is suitable for the video optical flow motion estimation of the significant range. It can not only obtain the video images following the human visual resolution characteristics, but also optimize the spatio-temporal gradient, while the optical flow calculation is more accurate. Besides, the time complexity of this algorithm is equivalent to that of the traditional optical flow method, and the accuracy of the algorithm is superior to the methods suggested by Horn-Schunck, Duan,et al.     

The application research on improvement of constant sinusoidal signal sampling precision based on adaptive filter

A novel scheme is present to improve the conversion accuracy of ADC. The proposed approach uses adaptive sinusoidal filter. For the measurement of the signal with given frequency, the automatic adjustment of filter coefficients is based on least mean-square error rule, which is a mathematical tool can be employed to make filter output signal achieve the best approximation to the needed one. Then based on the result, it is able to get the amplitude and phase of the measured signal accurately. MATLAB software is used to verify the effectiveness of the algorithm. It proves that adaptive filter has improved the accuracy and signal-to-noise ratio of ADC, which is equal to increase the conversion digits.     

盐胁迫对植物的影响及植物盐适应性研究进展

盐分是影响植物生长及发育的重要环境因素之一。本文综述了盐胁迫对种子萌发,生长发育及光合作用的影响,并从植物自身结构、活性氧清除、渗透调剂物质、离子稳态等方面评述植物对盐分的适应性机制。     

普通小麦品种（系）籽粒的铁含量分布

为了初步调查和评价我国普通小麦品种籽粒铁蛋白含量的分布状况,从我国品种中筛选铁含量高的基因型,为下一步高铁小麦品种的培育奠定基础,本研究随机选取了83个不同的小麦栽培品种（系）,利用原子吸收分光光度法测量小麦籽粒中的铁含量。结果表明,这些品种的小麦籽粒铁含量变化范围较广,从5.64mg?kg-1到59.5mg?kg-1,平均值为30.13mg?kg-1,变异系数14.56,变异幅度比较大;籽粒铁含量为10～50mg?kg-1的品种占85.55%,而籽粒铁含量高于50mg/kg的仅占10.84%,在品种间呈现中间多、两头少的分布趋势;四月糙、金裹银、灰三糙等3个农家品种的铁含量超过了50mg?kg-1,说明在农家品种中存在着高铁含量的种质资源。农大3753等四个“有色”品种铁含量在40mg?kg-1左右,属于中高水平。     

A Summary of Resesrch State on ProtectingAncient Stone Carvings from Weathering

It is a problem difficult to solve in the world to protect ancient stone carvings from weathering.In this paper,the research state of protecting stone csrvings beaten in the open is summarized and discussed. In the print of seriously weathered stone carvings on the rock wall in the open, some new research method is proposcd, especially, hydrologic- geochemical reaction and weathered rock carvings due to subsidence of rainwater and groundwater permeation.     

中国农垦种子产业发展的SWOT分析

运用SWOT分析工具剖析了现阶段中国农垦种业的发展优势、存在的问题,面对的挑战和面临的机遇,提出了农垦种业未来打造产业链、提升价值链、培育支撑链的发展建议.     

A Real-time Expert System Based on Adaptive Predication of Process State

The combination of the measured real time state acquisition from the process with predictive process for the fature state is used to predicate the variable tendency for process state. This method is useful to avoid delay and enhance real time ability of the control information of the expert system. Also a described knowledge and structure of real time process state are proposed. This system can be applied to other kind of practice systems with slow time variable, uncertainty and delay.     

Calculation Model Based on Improved BP Network of Refrigerant State Parameters

BP network is improved by using Levenberg-Marquardt optimization method. Under large swatch input circumstance, more fast network constringency speed and more highly approach precision are obtained. Calculation model based on improved BP neural network of refrigerant state parameters is established. The main defect of refrigerant hot ties of matter model in existing refrigeration and air-conditioning appliances simulation system is overcome.     

Improving the estimation of soil water evaporation based on days after wetting

Soil evaporation constitutes a major pathway of water loss in agriculture. Understanding its dynamics in the face of drying and soil cover is fundamental to improve both simulation models and the sustainability of production systems. Thus, the objective of this study was to estimate soil evaporation as a function of drying and percentage of soil cover. Three experiments were carried out in three different periods. In each of the periods, in parallel and in an adjacent area, an experiment was carried out to evaluate the influence of weighing micro-lysimeter (ML) height on the estimation of direct soil evaporation. The experiments were installed with a completely randomized design. For the experiments that measured evaporation as a function of cover, the treatments consisted of six different percentages of cover of the internal area of the ML (0%, 10%, 25%, 50%, 75% and 100%), with four replicates, using artificial plants to cover the soil. The experiments that estimated evaporation as a function of ML height were conducted with eight repetitions and three different ML heights (100, 200 and 300 mm). It was observed that the accumulated evaporation up to 25 days after wetting was 52% and 53% lower in micro-lysimeters with 100 mm height, compared to those with 200 and 300 mm height, respectively, for all experiments. The new model developed to calculate soil evaporation as a function of the days after wetting and percentage of soil cover showed excellent performance (NSE > 0.95).     

Influence of microwave radiation on phosphorus-removal process of oolitic high-phosphorus iron ore fines

Influence of microwave radiation on newly proposed phosphorus removal process(gaseous reduction and slag/metal separation) is studied. Microwave radiation on the ore fines is carried out using MW-HS multi-function high temperature microwave reactor. The treated ore fines are subjected to examinations of SEM, EDS and TG. TG tests are conducted using thermal analyzer(LINSEIS STA PT 1600). Results show that microwave pretreatment can obviously change the microstructure of the ore fine. After microwave pretreatment, arc cracks develop along the boundaries between phosphorite phase and hematite phase and loose zones in the areas where multi-minerals coexist. Microwave pretreatment has an intesification effect in the late stage of the gaseous reduction of the ore fines. Results of gaseous reduction and melt separation tests indicate microwave pretreatment could greatly improve the metal recovery rate in processing the ore fines using the proposed phosphorus removal method while phosphorus content in the metal sample is slightly increased. Under the condtion that the reduction temperture is 1 273 K, reduction atmosphere full CO and reduction time 2 hours, metallization rate of the sample pretreated using microwave power of 450 W could reach 90%. And in the melting separation process, its metal recovery rate reaches 83% with a phosphorus content of 0.48%(mass percent) in the metal sample.