Service contracts are continuous contract,with information asymmetry in their performance.In order to preserve the transaction security,protect the weak of information,highlight customization characteristics of service,it's necessary to inform and cooperate as required by the purpose of contract.The performance of service contracts is procedural and bidirectional.Defects of service should be affirmed from both process quality and result quality,which embody in the performance of contractual obligation group.Service contract obligation system contains the framework of pre-contractual obligations,process obligations and result obligations with priority of agreement as the premise and contractual process as a clue.Process obligations shows generality and necessity while result obligation shows particularity and selectivity.
In the perspective of criminal law principle to the principle of people's position as the position,with common sense,common sense,natural for content,emphasis on citizens' human rights safeguard.So the criminal law principle of necessity from the criminal law should be some content trace on the border of network crime.The criminal law principle of necessity to reveal the subjective fault is the key to network crime into whether,the criminal law principle of necessity to reveal the network crime and traditional crime is the same.The criminal law principle of necessity of unified network crime of real consensus in order and human rights,subjective and objective,virtual and reality,harm and risk,the criminal law principle of necessity to the public will consider other laws can effectively adjust,and there is no criminal law adjustment,the corresponding legal system will be paralyzed,that seek assignment respectively,criminal reconciliation in the network crime and crime is not a crime gentle connection to use.In the crime and he sin,and families to felony and misdemeanor,the criminal law principle of necessity use emotional direct measurement of punishment to the public,and to make in the corresponding charges between punishment against conviction,to ensure the legitimacy of cyber crime boundary.
A new three-step projective algorithm is proposed for non-convex variational inequalities based on the equivalence between the non-convex variational inequalities and the fixed point problems,which included the known two-step iterative algorithms as a special case,and modified iterative algorithms with the third-step iteration scheme using the technique of updating. The convergence criteria of the algorithms are proved under some suitable conditions.
Let F_qbe the q elements finite field. The literature( P. P. Wang,et al. Finite Fields and Their Applications,2012,18( 4) : 800- 813.) obtains several sufficient conditions for the existence of α∈ F_qsuch that α and α + α~(-1) are both primitive elements in F_q. Recently,the work( Q. Y. Liao,et al. Chin Annals Math,2015,in press.) generalizes their main results to the finite field with arbitrary characteristics. In this paper,we obtain a sufficient condition for the existence of the finite field F_qin which there exist two primitive elements α,β∈ F_q,such that α + β is also a primitive element of F_q. Furthermore,for finite fields satisfying this condition,by using character sums,we get a lower bound of the corresponding q. Finally,we verify that the condition is true for all finite fields with characteristic 2 except F_2 and F_4.
A finite group G is called a rational group,if every character of G is rationally-valued. In this paper,we classify some rational groups. In addition,we give an example of application,and a group-theory proof for a known result about rational groups.
Tight sandstone of Xujiahe Formation in Southern Sichuan basin( Shunan area) is one of the most important gas reservoir and gas-producing zone in China. Also,it is a typical tight sandstone reservoir. Based on the geological background,super tight sandstone reservoir developed relatively quality reservoir which is good for gas accumulation. For searching and predicting developed areas of‘sweet-point'reservoir effectively,Casting thin sections identify,cathodoluminescence,scanning electron microscope,property measurement and logging data were applied in diagenesis and formation mechanism of relatively quality reservoir in tight sandstone of Xujiahe formation in Shunan Maliuchang area. The results show that the tight sandstone of the Xujiahe formation research area has experienced compaction( pressolution),cementation,dissolution,metasomatism,authigenic quartz,authigenic calcite,authigenic chlorite,other authigenic mineral precipitation,cataclasis and various types of diagenesis. Compaction is the main reason for the reservoir density. Quartz overgrowth and calcium cementation in the process of diagenesis is the reinforcement and the key of the reservoir densification. Relatively high quality reservoir is formed by tectonic background,sedimentary environment and diagenesis factors shown as follows: 1) favorable sedimentary environment; 2) well-preserved condition of primary pore; 3) middle and post- diagenetic dissolution affect promoting the secondary pore development. Authigenic chlorite cladding can protect reservoir porosity when it reaches to a certain thickness,especially for primary intergranular pore which is more obvious in T3x4 segment. Kaolinite rules intergranular hole formed by the feldspar and aluminum silicate mineral dissolving also provide some reservoir space.
Flipped classroom changes teaching mode and thus promotes teaching efficiency of primary and middle schools. The influence of flipped classroom in universities is yet to be verified. This research is based on the two teaching models in modern educational technology experimental course. Through the contrast experiment and questionnaire survey, it finds that the flipped classroom model, greatly influ?enced by students, especially their physical conditions, couldn ’ t necessarily improve teaching effect. This paper suggests that teachers in universities should carefully choose the flipped classroom model in their classroom.
Although never made a discussion on European economic integration, Marx has foreseen the global economic integration resulting from the movement of capital. Form the perspective of Marxism Economics, the European economic integration can be regarded as the process with changing form during which capital expands its scope and grabs more excess profit. The logic of capital movement determines not only the starting point and the deadline of the process, but also the system defect and its develop?ment . Through this process, capital further exacerbates the contradictions in capitalist society while explo?ring its living space, thus brings more difficulties to the development of European economic integration. With the continuous advance of this process, capitalism will approach the limits of their own develop?ment, which appeared to prepare a solid material foundation and increasingly sophisticated social condi?tions for a new form of society.
TU Xiao?shi is a famous expert in religious studies in the May Fourth Period. He inter?prets religion from man’ s inner spiritual needs, self?consciousness, intuition and emotion. He argues that the essence of religion is man’ s direct feeling of transcender, with its essence as a direct subjective expe?rience. Religion has two roots:one is man’ s seek of moksa when facing natural or social constraints;the other is man’ s direct religious experience. Religious“transcender” is the highest ideal rather than ghosts as most Chinese intellectuals believed at that time. He claims that religion and science are not only com?plementary but also co?existent because the motivation of science is inseparable from religion, while reli?gion can get rid of its superstitious parts with the help of science.
Epistemology is the base of theoretical research and practical exploration on western teach?ers’ learning. The standpoint epistemology of traditional epistemology, constructive epistemology and complexity theory offers teachers’ learning research different features. Judging from developing trend, teacher learning studies nowadays should play a very significant role in prompting educational change sys?tematically while integrating individual?community ( school organization )?policy as one unit will be the highlight of future research.
In this paper,we investigate a class of non-monotone level top unimodal self mappings which increase linearly in [0,a],decrease linearly in [b,1],and are constant in [a,b] under iteration. We discuss the variation of number of level top intervals and the structure of level top intervals under n iterations.
Let R be a ring. Azumaya generalized the concept of projectivity of modules to single projectivity. The paper( Zhu S L. J Algebra,1991,139: 255- 261.) argued about rings over which every flat module is finitely projective. And the paper( Mao L X. Taiwanese J Math,2007( 12) : 501- 512.) gave a condition when every injective R-module is singly projective. This article shows some other relations between singly projective R-modules and other kinds of modules,such as quasi-injective R-modules,singly flat R-modules,finitely projective R-modules and divisible R-modules. And it is proved that singly projective modules are closed under direct sums.
Based on cultural and documentary study on the origin and evolvement of Hebo Myth,the Yellow River and Luoyang area is the birthplace and the first place to spread of Hebo Myth.Although the names vary from Fengyi,Bingyi to Wuyi and the plots differ,they share the general Manitou concept,all belonging to the same Dongyi group of Hebo Myth.From the Qin and Han dynasties,Hebo Myth had become a myth under the influence of Taoism.The further development and spread of Hebo Myth represent the mutual integration and development of all nationalities in China.
The diffusion equations are usually used to describe the change of density of substance in diffusion or the similar phenomenon. In this paper,a high-order compact difference scheme is proposed for solving the two-dimensional diffusion equation. The quartic spline function is used for the spatial discretization and the( 2,2) Pade approximation method is used for the temporal discretization. The scheme is fourth order accuracy in both time and space. Then,it is proved that this scheme is unconditionally stable. At last,numerical experiments are carried out to demonstrate its accuracy and stability.
A semigroup S is said to be strong right C-wlpp,if a∈ S,E( Ra**)≠Φ and there exists a unique a+∈ E(R**a)such that a+a = a,moreover x,y∈S,e∈E( S) the equation xey = xye is satisfied. In this paper it is proved that a semigroup S is strong right C-wlpp if and only if S is a spined product of a C-wlpp semigroup and a left normal band with respect to a semilattice,if and only if S is a strong semilattice of a family L-right cancellative semigroups { Mα× Lα| α∈ Y},where Mα(α∈Y) are L-right cancellative monoids and Lα(α∈Y) are left zero semigroups.
The relocation dispute is a common type of disputes.The core of the relocation dis-pute usually lies in the divergence on the amount of the relocation compensation and the process of fighting for it among all the parties.As the bargaining on the economic interests is a kind of typical bargaining behavior,the bargaining model can be used to analyze the relocation dispute. However,traditional analysis of the relocation dispute based on the bargaining model ignores the information asymmetry and its dynamic nature.By improving the Rubinstein bargaining model the dynamic bargaining model in relocation disputes under asymmetric information can not only explain the bargaining price by the method of quantitative analysis,but also help all the parties in the dispute to predict the bargaining price.More importantly,this model can guide us to resolve or avoid the dispute,and promote the relocation work to be carried out smoothly.
City is the carrier of service industry development and service industry competitiveness is the important embodiment of city's economic development level. Based on the background of region urban service industry competitiveness and its spatial and temporal change have been researched to indicate great significance on the development of the economy. This paper set up the evaluation index system of urban service industry competitiveness in Yangtze River Economic Region based on size,structure,performance,and atmosphere. Using the principal component analysis,service industry competitiveness of Yangtze River Economic Region in 2000,2005 and 2010 was evaluated. The main factor score and comprehensive score of urban service industry competitiveness were also calculated.According to the results,the rules and characteristics of the service industry competitiveness were discussed,which show that the urban service industry in Yangtze River Economic Region is still in the transition fromquantitytoqualitativechange stage and its spatial distribution presents a nuclear two take multilevelmutual matching space hierarchy. Furthermore,how to promote the competitiveness of service industry competitiveness has been proposed.
Energy utilization efficiency includes energy production efficiency and energy con-sumption efficiency.From the situation of provincial regions,technological progress and scale op-timization are the main factors to promote the comprehensive energy efficiency.From the four major economic sectors,independent innovation ability of the eastern and central regions should be further improved,the scale of the energy industry in western regions could be expanded mod-erately,and the energy structure in northeastern China must be adjusted immediately.There-fore,technical and managerial measures need to be taken simultaneously to enhance China’urrent energy efficiency.On the one hand,it is important to enhance the ability of independent innova-tion instead of the introduction of technical equipments to improve energy efficiency.On the other hand,traditional energy management mode should be improved and differentiated energy policy should be implemented.
There is some controversy of thedegradationform of the degradable PE film decomposed into the powder in soil after degradation. It is necessary to establish the method of separation and recovery PE residues from soil to elucidate that whether the polymer powder can continue degrade after it into the soil. LLDPE powders( Mw= 120 000) were taken as the simulated PE residue and then,they were extracted in soil through the soxhlet apparatus extraction method at high-temperature with mixed solvent( V( heptane)∶ V(( xylene) = 1∶ 4). The LLDPE samples were characterized by FT-IR-,HT-GPC- and DSC- after the separation. The effect of the extraction time and soil types on the molecular structure and thermal properties of LLDPE were studied. At the same time,the molecular weight of the composted LLDPE after 1 ~ 6 months were investigated by the outdoor compost experiment. The results show that the extraction rate increased with extraction time and it reached the maximum after 4 h( 75%). The FT-IR spectra illustrates that the molecular structure of LLDPE was not destroyed during the extraction and the crystallization of LLDPE was unchanged basically. Without too much influence on average molecular of LLDPE'the extraction time slightly narrow the molecular weight distribution. The LLDPE recovery is independent of soil type. The outdoor compost experiments of normal LLDPE and light degraded LLDPE had been carried out for 6 months by this method. Results show that there is a certain degradation of light degraded LLDPE samples during 4- 6months while scarce degradation of the normal LLDPE samples within 6 months. Experiment results indicate that the extraction and detection method can be used to evaluate the degradation of actual LLDPE in soil. The method can also assess the totally degradation time of LLDPE after long-term tracking down.
