X-Code is one of the most important redundant array of independent disk (RAID)-6 codes which are capable of tolerating double disk failures. However, the code length of X-Code is restricted to be a prime number, and such code length restriction of X-Code limits its usage in the real storage systems. Moreover, as a vertical RAID-6 code, X-Code can not be extended easily to an arbitrary code length like horizontal RAID-6 codes. In this paper, a novel and efficient code shortening algorithm for X-Code is proposed to extend X-Code to an arbitrary length. It can be further proved that the code shortening algorithm maintains the maximum-distance-separable (MDS) property of X-Code, and namely, the shortened X-Code is still MDS code with the optimal space efficiency. In the context of the shortening algorithm for X-Code, an in-depth performance analysis on X-Code at consecutive code lengths is conducted, and the impacts of the code shortening algorithm on the performance of X-Code in various performance metrics are revealed....
A series of methods for activated carbon regeneration were briefly introduced.Such as thermal regeneration,chemical regeneration,biochemical regeneration,and newly supercritical fluid regeneration, electrochemical regeneration,light-catalyzed regeneration,and microwave radiation method,and the developing trend of activated carbon regeneration was predicted....
This paper focuses on how to extract physically meaningful information from climate data,with em-phases placed on adaptive and local analysis. It is argued that many traditional statistical analysis methods with rigorous mathematical footing may not be efficient in extracting essential physical information from climate da-ta;rather,adaptive and local analysis methods that agree well with fundamental physical principles are more ca-pable of capturing key information of climate data. To illustrate the improved power of adaptive and local analy-sis of climate data,we also introduce briefly the empirical mode decomposition and its later developments....
The Story of The Stone is the peak of the art of the novel in ancient China. Its artistic achievement is displayed first of all in its dazzling array of characters. Jia Baoyu, Lin Daiyu, Wang Xifeng, Xue Baochai, Yuanyang, Qingwen, and the others all have their distinct personalities and are true to life as if they were living amongst us. These richly complex characters with their different stations in life and divergent views and philosophies act out an intricate pattern of human relationships and conflicts within the Jia family mansion. Apart from their distinct ways of acting and speaking, the peculiarities of their appearances, dress and liying arrangements, the names the author gave them also contribute a lot to the successfiul display of all these characters....
Copper consumption increased very quickly in China in recent years, which could not be met by inland copper industry. In order to achieve a sustainable development of copper industry, an analysis of copper recycling in China was necessary. For the life cycle of copper products a copper-flow diagram with time factor was worked out and the contemporary copper recycling in China was analyzed, from which the following data were obtained. The average life cycle of copper products was 30 years. From 1998 to 2002, the use ratio of copper scraps in copper production, the use ratio of copper scraps in copper manufacture, the materials self-support ratio in copper production, and the materials self-support ratio in copper manufacture were 26.50%, 15.49%, 48.05% and 59.41%, respectively. The materials self-support ratios in copper production and manufacture declined year by year in recent years on the whole, and the latter dropped more quickly. The average index of copper ore and copper scrap from 1998 to 2002 were 0.8475 t/t and 0.0736 t/t, respectively; and copper resource efficiency was 1.1855 t/t. Some efforts should be paid to reduce copper ores consumption and promote copper scraps regeneration.Copper scraps were mostly imported from foreign countries because of shortage in recent years in China. Here the reasons related to copper scraps deficiency were also demonstrated. But we can forecast: when copper production was in a slow rise or in a steady state in China, the deficiency of copper scraps may be mitigated; when copper production was in a steady state for a very long time, copper scraps may become relatively abundant. According to the status of copper industry in China, the raw materials of copper production and manufacture have to depend on oversea markets heavily in recent years, and at the same time, the copper scraps using proportion and efficiency in copper industry should be improved....
Power connector, as one kind of fittings, is used to connect power equipment to conductor, conductor to wire or wire to wire in power lines. Owing to its simple structure, easy installation and low cost, bolt-type power connector-parallel groove clamp is widely used in overhead power transmission and distribution line. However, owing to high current load and harsh environment in China, there are still some problems in application of this kind of connector. So, some failure connectors replaced from clomestic overhead power lines are collected. The main reasons the failure are given out through investigation into residual contact force, connection resistance, substrate quality, makeup, condition of contact interface and installation, manufacture technique etc. Then, the current test on parallel groove clamps is carried out and finite element method is used to simulate its failure process....
As a new and rising discipline, Corpus Linguistics can be applied in the field of literary criticism to analyze literary text. Analyzing“The Happy Prince”written by the famous British writer Oscar Wilde with corpus can help reveal how the plot, por-traits of people and the rhetorical devices express the theme of the story....
Pecently,a great tide of English teaching reform swept across China,advocating the innovation of educational concept and teaching mode.However,the phenomenon of rigid uniformity in teaching process is still commonly seen,neglecting the individual discrepancy of students.The individual discrepancy is manifested by both the congenital heredity and the acquired disposition.Supported by the Chinese traditional theory of teaching students in accordance with their aptitude and Vygotsky's "the zone of proximal development" theory,this paper illustrates the importance of paying attention to the individual discrepancy from the perspective of students' growing background and personality.In addition,standing on the point of view of relevant authority and English teacher,the author tries to put forward some countermeasures....
@@@@Tag question is often used in English conversation, but it is also a very complicated syntactic structure in English which becomes the difficulty of English learners. Tag question involves various grammatical factors. A full linguistic analysis of tag ques?tions includes the classification, construction and meanings of intonations of the tag questions in English. The study of tag ques?tion aims at providing substantial contribution to the teaching and learning of English syntax....
Everyone will meet with difficulties all through his life. But he should have fiull confidence in himself if he wants to make a suc cess. There is a typical figure in Jack London's novel. This paper mainly focuses on analyzing the character and encourages people to remember ifwe are diligent and don't give up whenever we come to anything difficult, we are sure to conquer and overcome every difficulty we meet with. Let's keep it in mind such kind of saying that where there is a will there is a way....
In the field of cloud computing, topics such as computing resource virtualization, differences between grid and cloud computing, relationship between high-performance computers and cloud computing centers, and cloud security and standards have attracted much research interest. This paper analyzes these topics and highlights that resource virtualization allows information services to be scalable, intensive, and specialized; grid computing involves using many computers for large-scale computing tasks, while cloud computing uses one platform for multiple services; high-performance computers may not be suitable for a cloud computing; security in cloud computing focuses on trust management between service suppliers and users; and based on the existing standards,standardization of cloud computing should focus on interoperability between services....
The code of ethics and standards of professional conduct are important and necessary, for it provides standards for pro-fessional’s daily dealing. It forbids conflicts of interest minimizing problems;it enhances public trust;and it lifts up high moral and ethical standards. Maintaining independence and objectivity in daily activities and following the code provide a fine basis of ethi-cal judgments....
The cause of stop marks of fabrics in weaving is introduced, and the floating displacement of the cloth fell during loom stoppage is a primary cause of stop marks. The stop marks caused by fabric system are analyzed. A new method to eliminate stop marks by using the electronic let-off system is presented. This new method needn't any special detecting equipment, it can control the fell position by the powerful control program,so the cost is decreased greatly. The method is so flexible that can be applied to weaving all kinds of fabrics....
The Call of The Wild is the most famous novel written by Jack London. In this novel, London depicts the story of a powerful dog called Buck, which happened in the Gold Rush Times when a great number of people came to Alaska to find gold. It tells us how Buck learns to struggle and strive, and how his wildness is aroused. By narrating Buck＇ s experience, London shows us some of the temporary social characters： the indispensable struggle for mastery and the nature of humanbeings -- wild etc. It reflects the major thoughts of that time. This essay will analyze this theme -- the indispensable struggle for mastery....
Lexical ambiguity is a very common phenomenon in English and other language,which brings many troubles to people in communication.And that is also why people have deeply studied this phenomenon for a long time.This thesis makes a profound analysis of lexical ambiguity from semantic perspective.The thesis talks about the three sources that contribute to lexical ambiguity:homonyms,polysemy and word class ambiguity.Through the analysis of lexical ambiguity from semantic perspective,this thesis aims at helping people eliminate troubles in communication....
Wing motion of a dragonfly in the maneuvering flight, which was measured by Wang et al. [1] was investigated. Equations of motion for a maneuvering flight of an insect were derived. These equations were applied for analyzing the maneuvering flight. Inertial forces and moments acting on a body and wings were estimated by using these equations and the measured motions of the body and the wings. The results indicated the following characteristics of this flight: (1) The phase difference in flapping motion between the two fore wings and two hind wings, and the phase difference between the flapping motion and the feathering motion of the four wings are equal to those in a steady forward flight with the maximum efficiency. (2)The camber change and the feathering motion were mainly controlled by muscles at the wing bases....
in the chapter 13 of Leviathan, by analyzing hnnaan nature, Thomas Hobbes gives out his hypothesis of the Natural state, in which people's lives are guided by law of nature. Without a common power to keep all in awe, the law of nature cannot be observed all the time. Thus long time peace and comfort will never be achieved, and even the security of people cannot be guaranteed. This situation can also be applied to the modem international anarchical society. This paper will make an analogy between the natural state in Leviathan and the modem international society to analyze the reason of international conflicts....
The analytic properties of scattering amplitudes provide a meeting point for experimental and theoretical investigations of baryon resonances. Pole positions and residues allow for a parameterization of resonances in a well-defined way which relates different reactions. The recent progress made within the Jiilich model is summarized....
Based on the data envelopment analysis (DEA) theory, the optimal pathway of metabolic reaction networks in biochemical systems is studied. After calculating the mixed-integer linear programming (MILP) model given by Bailey et al. twice, the decision making units (DMU) and the prediction model of DEA are constructed, where the inputs are levels of manipulated parameters (enzyme) and outputs are concentrations of metabolites. When the metabolic networks are reconstructed, the data are obtained by calculating MILP framework twice and the optimal levels of the manipulated parameter at different regular loops are predicted, thus simplifying the calculations of Bailey's....
Abstract:Corroborative evidence is the basis for ascertaining and corroboration rules are proof the rules, plays a corroborative proof function and limiting the discretion of judges. Full study of corroborative evidence in civil procedure rules to use, helps to perfect evidence rules of civil procedure and civil systems....
With regard to the beginning of the Korean War, a lot of discussion has long been raised. The origin of the war has remained a little complicated. World War II divided the country into two parts, each envisioned head of a unified Korea. U.S. and the Soviet Union's intervention in both sides enhanced the conflict. The intervening of People's Republic of China served the final factor. This paper intends to analyze the possible reasons of starting of the war....
The English as a Second Language （ESL） Curriculum for grades K - 12 is a scope that builds and develops linguistic proficiency for students between the ages of six and 21 years. The ESL professionals defines ESL students as those students who are non - native English speakers and who may or may not have English proficiency....
To investigate the influence of the solidification on the solder bump formation in the solder jet process, the volume of fluid (VOF) models of the solder droplets impinging onto the fluxed and non-fluxed substrates were presented. The high speed camera was used to record the solder impingement and examine the validity of the model. The results show that the complete rebound occurs during the process of the solder droplet impinging onto the fluxed substrate, whereas a cone-shaped solder bump forms during the process of the solder droplet impinging onto the non-fluxed substrate. Moreover, the solder solidification results in the lift-up of the splat periphery and the reduction in the maximum spread factor....
The expansion process of ablation plasma jet in liquid was experimentally investigated by using high speed digital camera. The sequential pictures show that, in the initial stage of the jet, the Taylor cavity expands in the axial and radial directions simultaneously, and then, is subjected to the constraint of chamber wall, in axial direction be found in the surface of Taylor cavity, where the plasma cools down and condenses as solid particles while the liquid vaporizes as gas. Compared the expansion processes of the cavities among the different discharge energies and the nozzle diameters, it can be seen that the expansion speed of the cavity is directly proportional to the discharge energy and inversely to the nozzle diameter, and the effect of the discharge energy is stronger than that of the nozzle diameter. A set of equations describing the expansion process of ablation plasma jet was derived under the assumption of momentum conservation. The calculated results by use of the equations coincide with the experimented results better....
The temperature distribution in the advanced thermoset composite during the laser curing process was predicted with the use of the two-dimensional thermo-chemical model presented in this paper which also gives the governing equations based on the thermal history of the curing process. The finite-difference method was used to get the temperature distribution. This paper also deals with the effect of some factors (such as the winding velocity, the tape thickness and the laser heat source) on the temperature distribution....
