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Matrix is a mathematical object, commonly used in scientific computing and engineering calculation. We are not interested in data itself in the data structure, but how to store the elements in the matrix. The main purpose of the compressed storage is to make more of the same nonzero elements share the same storage unit according to the distribution of matrix element, while the zero elements don't allocate storage space. In this paper, we studied the row priority compressed storage problems of u pper trapezoidal matrix, and obtained the corresponding storage address mapping function, so as to help the scientific research worker.

A proper edge coloring of graph G is called equitable adjacent strong edge coloring if colored sets from every two adjacent vertices incident edge are different, and the number of edges in any two color classes differ by at most one, which the required minimum number of colors is called the adjacent strong equitable edge chromatic number. In this paper, we present the edge coloring of join-graphs about path and cycle, and gain the vertex-distinguishing edge chromatic number of 𝑃𝑚 ∨ 𝐶𝑛.

Matrix is a mathematical object, commonly used in scientific computing and engineering calculation. In the data structure the main purpose of the compressed storage is to make more of the same nonzero elements share the same storage unit according to the distribution of matrix element, while the zero elements don't allocate storage space. In this paper, we studied the compressed storage problems of upper banded matrix, and obtained the corresponding storage address mapping function.

The teaching of information technology education has implemented for more than 30 years in China, but the information technology courses exist very serious problems in the practice teaching process. This article from four aspects present the current problems in the information technology in the teaching process, and detail on how to reform it. The teaching of primary and secondary schools information technology education has implemented for more than 30 years in China, but exactly what results have been achieved in education over the years, the author as a teacher of colleges, surveyed new students and found that new students in master of information technology courses are different, but about the ability to apply the information technology, the majority of them are blank, even they will not operate the basic typesetting the document. This phenomenon against the development targets of information technology education in primary and middle schools, therefore we must reform the primary and secondary school information technology education. We compared "MSOffice on the national computer rank examination level syllabus (2013)" with "the school information technology curriculum guidelines (trial)" and found that their contents are basically the same. Freshmen attend the national computer rank examination level MSOffice mock exams, students performance is very bad, this indicate that the primary and middle schools information technology courses exist very serious problems in the practice teaching process in China. This situation, not only waste the national resources ,at the same time, but also waste the valuable time for the majority primary and middle schools students, and also kill the autonomous learning habits what are trained from the big data world. Therefore, the primary and middle schools must start from the following four aspects and solve the current problems in information technology education fundamentally.

Matrix is a mathematical object, commonly used in scientific computing and engineering calculation. In the data structure we are not interested in data itself, but how to store the elements in the matrix, and make the various operations can run effectively. The main purpose of the compressed storage is to make more of the same nonzero elements share the same storage unit according to the distribution of matrix element, while the zero elements don't allocate storage space. In this paper, we studied the compressed storage problems of lower half banded matrix, and obtained the corresponding storage address mapping function, so as to help the scientific research worker.

Greedy algorithm, also known as voracity algorithm, and is simple and easy to adapt to the local area of the optimization strategy. In other words, every time it makes the choice is the best choice in the current. It is not considered from the point of view of the overall optimization to consider, but every time the choice is only in a sense of the local optimal choice. So, for a problem, we should consider whether it can use the greedy algorithm strategy, and whether the solution we find is the optimal solution. It is not an overall optimal solution to any problem, but most of the problems with a wide range of problems can be solved by the global optimal solution or the similar solution of the global optimal solution. With the arrival of the era of big data, a large number of data information needs to be processed in a timely manner, In order to meet the needs of people to deal with a large number of data information, and to solve various practical problems in a timely manner, computer algorithm got the rapid development, A large number of operations research models have been applied to the computer algorithm, which has produced many effective algorithms to solve practical problems. Greedy algorithm in solving the problem, it is from the initial stage, in each stage is to make a local optimal greedy choice. Each time the greedy choice transforms the original problem into a sub problem of the same form as the original problem. Greedy algorithm has no fixed algorithm framework, the key of the design algorithm is the choice and determination of greedy strategy.

Northwestern China has an extremely complex climate due to the varied terrain and complexities of climate change where the environment is sensitive to both regional and global climate change. We applied the Mann-Kendal test to investigate trends in temperature change using annual, seasonal and monthly data recorded from 1960 to 2008. On the whole, annual, seasonal and monthly the temperature shows a widespread warming over this period. The variation in the precipitation pattern is more complex than that of the temperature. In the western region such as northern Xinjiang and western Qinghai, the precipitation has increased over the period, showing consistency with the change in temperature. Whereas in the eastern region such as eastern Gansu and southern Shanxi, the precipitation has remarkably decreased, which is opposite to the change observed in temperature.

Linear programming problem is a common problem, and to solve the linear model is more plagued. The paper generating algorithm is based on mathematical theory and composition. The design of feasible solution algorithm illustrates key linear programming model, then we can find a better way to solve the linear programming model solutions.

Let G(V, E) be a simple graph and k is a positive integer, if it exists a mapping of f , and satisfied with f(e 1 )≠6 = f(e 2 ) for two incident edges e 1 , e 2 ∉ E(G) , f ( e 1 )≠6= f ( e 2 ), then f is called the k -proper-edge coloring of G(k-PEC for short). The minimal number of colors required for a proper edge coloring of G is denoted by X′ ( G ) and is called the proper edge chromatic number. It exists a k -proper edge coloring of simple graph of G , for any two adjacent vertices u and v in G , the set of colors assigned to the edges incident to u differs from the set of colors in cident to v , then f is called k -adjacent-vertex-distinguishing proper edge coloring, is avvreviated k-AVDEC , also called a adjacent strong edge coloring. The minimal number of colors required for a adjacent-vertex-distinguishing edge coloring of G is denoted by X ′ ad ( G ) and is called adjacent-vertex-distinguishing edge chromatic number. The new class graphs of equal degree graph are be introduced, and this class graphs adjacent-vertex-distinguishing edge chromatic numbers of path, cycle, fan, complete graph, wheel, star are presented in this paper.

Pancreatic ductal adenocarcinoma (PDA) is among the most lethal human cancers and it is insensitive to many chemotherapeutic drugs. The molecular basis of pancreatic cancer remains to be elucidated. Investigations into the molecular mechanism involved in the development and progression as well as drug resistance of the disease may be useful to understand the pathogenesis and progression of the disease and offer new targets for effective therapies. In the present study, we showed that salt-inducible kinase 1 (SIK1) was downregulated and loss of SIK1 was associated with gemcitabine resistance in pancreatic cancer. In pancreatic cancer cells, SIK1 inhibited proliferation, migration and invasion. An analysis of potential microRNA target sites was performed using the prediction algorithms, miRanda, TargetScan and PicTar. The three algorithms predicted that miR-203 is capable of targeting 3'UTR of SIK1. Subsequent experiments confirmed the prediction. In addition, the results showed that miR-203 promotes proliferation, migration and invasion in pancreatic cancer cells, whereas the restoration of SIK1 abrogated the regulation of pre-miR‑203-mediated proliferation, migration and invasion.