单相交流电路中的功率成分

基于瞬时功率概念，针对单相交流电路提出了新的功率成分定义。各种功率成份都有明确的物理意义并与功率过程直接相关。该功率定义适用于直流、交流正弦和交流非正弦等电路，对非有功功率补偿器的选择和设计具有指导意义。

三相交流电路中瞬时功率的分析和研究

基于瞬时无功功率理论分析了α-β坐标中的功率成分和三相电路中各相功率间的关系.为检测谐波电流和无功电流提供了研究的方法.

Application of micro-seismic facies to coal bed methane exploration

A neural network is applied to high-quality 3-D seismic data during micro-seismic facies analysis to perform the waveform analysis and training on single reflection events. Modeled seismic channels are established and the real seismic channels are classified. Thus, a distribution of micro-seismic facies having a high precision over a fiat surface was acquired. This method applied to existing geological data allows the distribution of areas rich in coal bed methane to be clearly defined. A distribution map of the micro-seismic facies in the research area is shown. The data accord well with measured methane con- tents, indicating that the analysis using micro-seismic facies is reliable and effective. This method could be applied to coal bed methane exploration and is of great importance to future exploration work and to an increase in the drilling success rate.

Reliability testing and reliability analysis of the over-load protective relay

The over-load protective relay is widely used directly affects the safe running of a motor. The reliability for motor protection. The reliability of the over-load protective relay testing and reliability analysis of the over-load protective relay is an important way to improve the reliability of products. In this paper, the reliability test method of the over-load protective relay is studied, and the reliability tests of the typical products are carried out on a reliability tester developed by authors. In terms of the testing results, the reliability analysis is finished. The failure reasons are found and the measures are put forward to improve the reliability of the products.

多控制回路振荡源诊断的软件平台的构建

在一些大型工业过程中,由于其系统的复杂程度高,其系统出现故障的概率相对也会变高,因此对多回路系统振荡源的诊断及研究对实际工业中的振荡诊断具有很重要的意义。利用Matlab Gui设计了多控制回路振荡源诊断的软件平台,集成了功率谱主成份分析法(SPCA)、功率谱独立成分分析法(SICA)、非负矩阵分解法(NMF)、功率谱相关性图法(PSCMAP)四种方法。通过此软件平台对生成的仿真数据进行振荡源的诊断,仿真结果初步验证了平台是有效的。

Nietzsche＇s Naturalistic Metaethics： In Defense of Privilege＊

In his essay ＂Nietzsche＇s Metaethics： Against the Privilege Readings,＂ Brian Leiter critically examines Richard Schacht＇s naturalistic interpretation of Nietzsche. Leiter focuses on the metaethical question： ＂What status--metaphysical, epistemological^o the values used to undertake [Nietzsche＇s] revaluation [of value] （the ＇assessing values＇） enjoy？＂ （2000, 277）. Are these values true or better justified？ Leiter describes Schacht＇s position as a ＂privilege reading＂ that holds that the perspective from which Nietzsche revaluates values is privileged on the basis of＂normative facts＂ which are constituted by certain ＂natural facts＂ （2000, 279）. Leiter attempts to outline and even enhance the argument he sees Schacht making for this position, which Leiter calls a naturalistic realism. Leiter however finds that the arguments for ＂privilege readings＂ are insufficient. He concludes that the perspective from which Nietzsche revaluates values is not privileged at all. It is simply the idiosyncratic perspective from which Nietzsche revaluates values. In this paper I argue that a version of Schacht＇s privilege reading can be supported using two fundamental components of Leiter＇s interpretation of Nietzsche： his methodological and substantive naturalism. When we use scientific methods and view social systems like other natural systems, we find that in contemporary science a privilege is given to the maximum power principle. This concept was initially conceived by the chemist and mathematician Alfred Lotka and further developed by the ecologist Howard Odum and it has a fundamental similarity to the will to power. This principle provides an empirical foundation for the will to power and Schacht＇s privilege reading of Nietzsche＇s metaethics. It provides further evidence that human life is ultimately part of a vast natural process and the growth of all natural systems is made possible by an increase in power.

A new broadband differential phase shifter fabricated using a novel CRLH structure

Broadband phase shifters are mostly proposed and fabricated based on the scheme proposed by Shiffman, which uses a coupled line with far ends connected together and a uniform transmission line to give a differential phase shift. Based on the unique dispersion property of the composite right/left-handed (CRLH) metamaterial structure, a new configuration is presented in this paper for fabricating the broadband differential phase shifter, which employs a novel CRLH metamaterial structure as one of the differential phase-shift arms, instead of the conventional coupled line. The new circuit can achieve a phase shift of 90° in an operational bandwidth as broad as one octave and its phase deviations are quite small. An original design of the novel broadband phase shifter is presented, in which the artificial CRLH structure was implemented by microstrip quasi-lumped elements. Both the simulated and measured results of the 90° broadband differential phase shifter are presented.

Role and Mechanism of Functional Components in Promoters for Enhancing FCC Propylene Yield

Phosphorus （P） and metal （M） components were incorporated into promoters for enhancing FCC propylene yield, and the reactive behavior of promoters, before and after modification, were investigated. The results showed that both LPG and propylene yields were increased, and propylene selectivity was improved after the incorporation of P or M into the matrix, resulting in an increased C3 to C4 ratio in LPG during FCC process. But the sole incorporation of M into the matrix also led to an increase in coke and H2 yields on the other hand. Simultaneous modification of the matrix by P and M components resulted in more enhancement in propylene yield and selectivity along with little influence on FCC product distribution. Physico-chemical characterizations and model compound reactions were used to assist in analyzing the mechanism for improving propylene selectivity. Two types of active centers could strengthen the oligomerization of C4 olefins in LPG and these oligomers could be further cracked into C3 olefins on ZSM-5 zeolite, therefore maximizing the ratio of C3 to C4 in liquefied petroleum gas obtained during FCC process.

Allocation of fixed transmission cost based on power flow tracing algorithm

In the electricity market, charging based on the traditional spot electricity price often results in the payment imbalance of electric network, and goes against the development of the power system. So, it is necessary to modify the spot price. The key of the modification lies in how to calculate the fixed unit transmission cost of each node, that is how to allocate the fixed transmission cost to users.To solve this problem, we develop a power flow tracing algrithm to modify the spot price. We put forward a path searching method based on the graph theory after studying the fundamental principle of power flow tracing and apply the method to the downstream tracing algorithm and upstream tracing algorithm according to the proportional distribution principle. Furthermore, to improve the computational efficiency of the algorithm, we introduce the branch expunction method to optimize the node order. By using the result of power flow tracing to get fixed node transmission cost and introducing it to modify the spot price, we obtain the synthetical price.The application to a 5-bus system prove the algorithm feasible.

Influence of dietary n-3 LC-PUFA on growth, nutritional composition and immune function in marine fish Sebastiscus marmoratus

Abstract A 60-day feeding experiment was conducted to investigate the influence of dietary omega-3 long-chain polyunsaturated fatty acids （n-3 LC-PUFA） on growth, nutritional composition and immune function of marine fish Sebastiscus marmoratus. Five diets containing 3.6, 10.2, 18.2, 26.5, or 37.0 g/kg n-3 LC-PUFA were prepared. The results reveal significant influences of dietary n-3 LC-PUFA on the final weight, weight gain, specific growth rate, feed conversion ratio, and condition factor. As dietary n-3 LC- PUFA increased, weight gain and specific growth rate increased and were significantly higher in groups fed 18.2, 26.5 and 37.0 g/kgthan in groups fed 3.6 and 10.2 g/kg （P〈0.05）; there was no significant difference between groups fed 18.2, 26.5, or 37.0 g/kg （P〉0.05）. With increasing dietary n-3 LC-PUFA, eicosapentaenoic acid and docosahexenoic acid content in muscle and liver increased significantly, immunoglobulin class M content gradually increased from 9.1 to 14.8 Ixg/L, and lysozyme activity content increased from 1 355 to 2 268 U/mL. Broken line model analysis according to weight gain indicated that a dietary n-3 LC-PUFA level of 18.2 g/kg is essential for normal growth at a fat level of 125 g/kg. Therefore, appropriate dietary n-3 LC-PUFA not only promote growth and improve the n-3 LC-PUFA content, but also enhance immune function in S. marmoratus.

Splitting Unknown Qutrit or Ququart States via Two-Qubit Partially Entangled States Channel

In this paper we propose two quantum information splitting (QIS) schemes respectively for splitting an unknown single-qutrit and single-ququart state via three pairs of two-qubit partially entangled state. The necessary measurements and operations are given detailedly and the success probabilities are worked out. The two schemes can be directly generalized to QIS of multi-qutrit and multi-ququart states by using Bell-states channel.