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Research on Vibratory Stress Relief Technology and R&D of Vibratory Stress Relief Set

On 02/03/2015, in Economics papers, by rain

The investigation of VSR(vibratory stress relief) were started in 1960s because of energy sources crisis. The technology of VSR has some characteristics as follow. First, Mechanical performance is improved obviously. Second, applicability is more abroad. Third, VSR technology saves time, energy and funds. The technology is introduced to our country in 1976. However, up to the present this technology isn’t used widely.In the beginning, the mechanism of VSR is analyzed in this paper. The essential method of relieving residual stress is introduced on the basis of analyzing the mechanism of residual stress producing and relieving. From the view of stress-strain principle of the metal and micro-mechanics, the mechanism of VSR is analyzed and the process of stress relieving and even distribution. The expression of VSR’s demand of micro-mechanics is given also. According the pertinent materials, the criterion of VSR is proved.On the basis of mechanism analyzing of VSR, a set of Vibration Stress Relief Based on PC is developed. The technology of AC adjustable-speed with frequency conversion is applied. The scheme of the whole system is introduced in the paper. And the advantages of the set compared with those in existence are analyzed. The diagrams of software are also shown. Finally, the experimental result shows the effectiveness of the set.A series of experiments on the welded specimens were carried out. The measurement techniques of stress test by ultrasonic surface wave are introduced and the internal remanent stress of welded specimens is measured quantificationally, before and after vibration. Based on observation of the dislocation density variation before and after vibration, we analyze the test process and results systematically and then make a responding conclusion.In the end, systematical summary is given, and some problems under to study in future are put forward.

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The Preparation, Modification of Supported Titanium Catalyst and the Study on Diolefin Polymerization

On 28/02/2015, in Economics papers, by rain

The preparation methods of supported titanium catalyst were firstly studied, thetesting methods of water content of catalyst carrier, content of titanium in catalyst.catalytic efficiency and density of catalyst were brought forward. The trans unitcontent of TPI. crystallinity, molecular weight and distribution, physical performanceand ash content were studied, the examination methods of the product were broughtout accordingly in order to control the quality of TPI production and compare withforeign products.In the progress of catalyst preparation, the catalytic efficiency was easily to bedecreased in the presence of crystal water which always appeared because of thestrong absorbent power of MgCl2. So the crystal water caused by air slaking of MgCl2should be avoided in the progress of catalyst preparation. The methods of heattreatment at high temperature and adding isobutyl aluminum for MgCl2 to wipe offcrystal water were tried, but the results showed that the methods used above weredisadvantaged for increasing catalytic efficiency. The vibration mill had largercatalytic efficiency compared with rolling mill and the best time for the preparationwas more than 15 hours.The TPI (poly trans 1, 4-isoprene) synthesized with the catalyst above wascompared with the foreign products, the results showed that the content of trans unit.crystallinity were higher of self-made TPI. but the molecular weight was lower.Moreover. the tensile strength, modulus at definite elongation, hardness, density ofselfmade TPI were better than the foreign products while the breaking elongation was lower. The catalytic system was similar of the two products through ash analysis, butthe foreign product had more ash and lower catalytic efficiency so that influenced theaging of the rubber.IR spectrum was used to analysis the structure of poly butadiene synthesizedwith supported TiClx(OC8H17)4-x(x=1-3) in order to improve the performance of theproduct made by supported titanium catalyst, the results showed that the content oftrans unit was more than 90%. expect for the trans unit. mostly of the structure was1.2-unit. The content of chloride in the TiClx(OC8H17)4-x before supporting onlyeffected the catalytic efficiency and had no effect on the polymer structure. Themelting point and crystallinity were studied by DSC. the results showed that therewere two crystal peaks of the polymer, the high temperature peak and low temperaturepeak were 147.7℃and 66.2℃respectively and the crystallinity were 78.3%and 34%respectively. The catatytic efficiency increased with the chloride content in theTiClx(OC8H17)4-x increasing and decreased after increasing with the increasing ofAl/Ti. the suitable Al/Ti was 80. The catalytic efficiency increased when Ti/Bdincreased or temperature increased, but decreased when the temperature was higherthan 40℃. The molecular weight decreased after increasing with the inceasing ofAl/Ti and reach the highest level when the Al/Ti was 80. The molecular weightdecreased with the increasing of catalyst mass and went down after increasing withincreasing the temperature; the highest value was at the temperature of 40℃.IR spectrum was used to analysis the structure of poly isoprene synthesized withsupported TiClx(OC4H94-x(x=0-3). the results showed that the content of trans unitdecreased with the content of chloride in the catalyst decreasing while the cis-unitincreased. The 1H-NMR was used to character the sample of poly-isoprenesynthesized with the catalyst of x equals one. The analysis gave the results that themass content of 3, 4-unit was 4.7%, cis 1, 4-unit was 46.2% and trans1, 4-unit was49.1%. The catalytic efficiency increased with the increasing of chloride in thecatalyst and decreased after increasing with the increasing of Al/Ti. The catalyticefficiency increased with the increasing of Ti/Ip and temperature, but decreased whenthe temperature was too high. the benefit temperature range was 30℃to 40℃. Themolecular weight decreased after increasing with the increasing of Al/Ti andtemperature while decreased with the increasing of catalyst.The mechanism in the progress of modification was studied because of theresults of the two methods that including modification after supporting (done byprevious work) and supporting after modification (said above) in polymer unit were different distinctly. The results showed that titanate generated in the progress ofmodification that adding alcohol after supporting and the content of titanate did notincrease with the increasing of modification agent (alcohol). The polymer synthesizedwith alcohol modified catalyst (modification after supporting) was the mixture. Thesoluble part in the poly butadiene synthesized with the catalyst of modification aftersupporting was mainly 1.2-unit and cis 1.4-unit. the content of trans 1,4-unit in thesoluble part was distinctly lower than that in the insoluble part while the content of 1,2-unit was low in the insoluble part. So the mechanism of catalyst could be describedas follows: supported TiCl4 reacted with alcohol and gave the active center of titanatethat cooperated with the active center of supported titanium, the two active centerinitiated monomer together and gave the mixture of polymer that contained differentunits: in the case of supporting after modification, the synthesized polymer wasmainly trans 1.4-unit because the orientation of catalytic active center generated bythe interaction of MgCl2 and TiClx(OR)4-x.

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On Ensuring the Right Direction of Marxism Localization in China in the New Historical Period

On 20/02/2015, in Economics papers, by rain

The spirit of Marxism has been hanging over the European continent for hundreds of years, but finally thrived in China, which is the successful manifestation of the early localization of Marxism in China. It is of great significance to hold on the right direction of Marxism localization, further motivate the theoretical innovation, find a comprehensive working thought and provide theoretical guidance to continue the road of socialism with Chinese characteristics by systematically analyzing the historical development and the status quo of the localization of Marxism in China, learning from the historical experiences home and abroad, and exploring the formation mechanism of Marxism localization in China.During the new historical period, the localization of Marxism in China has been faced with new challenges from home and abroad especially with Dogmatism, bookishness and empiricism being the influential factors on whether the right direction of Marxism localization can be held on. It is deeply rooted in the pernicious influence of Chinese Feudalism, the political conspiracy of peacefully evolving the proletarian China into a bourgeois one by western bourgeoisie and the violation of the Party’s ideological line of emancipating the mind and seeking truth from facts.The localization of Marxism in China must be raised and gain its success in an appropriate environment. To be specific, emphasis should be laid on the following aspects: consolidating the worker-peasant alliance and safeguarding the peasants’interests by all means; carefully launching the mass political campaign; carrying the fight against corruption through to the end; strengthening the construction of the Party’s cultural and ideological battlefield during the information age; stressing the development of the relationship with the third world countries; correctly understanding the historical period that capitalism is in and making use of the advanced achievements from the capitalism. At the same time, emphasis should also be laid on the fight against the dogmatism of treating Marxism as unchanged theory and the new dogmatism of sanctifying the western experiences especially the American experiences; continuing the theoretical innovation and practical exploration when opposing the above two kinds of dogmatism to give back the real nature of Marxism; persistently holding on and carrying out the Party’s ideological line of emancipating the mind, seeking truth from facts and progressing with the times, and promoting the localization process of Marxism in China in the new era.To ensure the right direction of Marxism localization in China, scientific mechanism should be formed, which requires the systematic implementation from the following seven aspects: the perfection of the Party’s leadership system and organizational structure, the construction of learning political party to cultivate the Marxist successors, the establishment and implementation of such Basic systems as democratic centralism, the practice of all the systems in political life, the careful researching and studying and holding on the mass line to promote the popularization of Marxism, the sticking to the working method applying theory to practice, and standing up for truth and correcting mistakes.

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Theoretical Study on the Synthesis and Isomerization of Thiotriazinone

On 18/02/2015, in Economics papers, by rain

With a large market damand, thiotriazinone is an intermediate in thesynthesis of semi-synthetic ceftriaxone. Presently, the production technologyof thiotriazinone is still to be improved in domestic. It is very significant tostudy thiotriazinone both experimentally and theoretically. In this work, themolecular structures and spectroscopic properties of the four isomers ofthiotriazinone (denoted as TTZ1, TTZ2, TTZ3and TTZ4, respectively) werestudied by quantum chemistry method, as well as mechanisms of its synthesisand isomerization.Firstly, single crystals of thiotriazinone were cultivated in differentsolvents. Three single crystal samples were used for single-crystal X-raydiffraction analysis. The three results were the same as TTZ1. Then, thestructural optimizations and frequency calculations of the four isomers werecarried out by B3LYP and HF methods, respectively, with the6-311++G(d,p)basis set. The theoretical structural parameters of TTZ1were in goodagreement with the experimentally measured values. According to the resultsof single-crystal diffraction and the calculated total energies of the fourmolecules, it could be inferred that thiotriazinone most probably existed asTTZ1. Besides, IR and NMR spectra of both single crystal and raw materialsamples of TTZ1were measured. The results of the two samples were thesame. The scaled frequencies showed good agreement with the experimental wavenumbers. The13C NMR and1H NMR chemical shifts were obtainedusing a higher basis set6-311++G(2d,2p), in accordance with the experimentalresults. Based on the optimized structures by B3LYP method, the frontiermolecular orbitals and molecular electrostatic potential (MEP) were analysed.The values of the energy separations between the frontier molecular orbitalsgave significant information about these compounds. The MEP maps showedthat the negative potential sites were on electronegative oxygen atoms and thepositive potential sites were mostly around the hydrogen atoms.Secondly, reaction mechanisms of the synthesis of thiotriazinone werestudied at the B3LYP/6-311G(d,p) level. The synthesis methods includedintramolecular cyclization with1-oxamoylthiosemicarbazide andintermolecular cyclization with2-methylthiosemicarbazide and diethyl oxalate.It can be concluded that the main reaction pathway for intramolecularcyclization was cyclization through dealcoholization after the transfer of Hatom. The activation energy for the process of H transfer was distinctlylowered under the catalysis of DBU. As to intermolecular cyclization, themain reaction pathway contained condensation, dealcoholization, cyclization,dealcoholization, isomerization. And the rate-determining step wascyclization.Finally, reaction mechanisms of isomerization among the four isomers ofthiotriazinone were researched. It can be concluded that the isomerization ofthiotriazinone was realized through the transfer of the active H12and H15atoms, accompanied the rotation of methyl group. The activation energybarrier of the conversion of TTZ2to TTZ1was relatively higher, and it is alittle hard to realize. The activation energy barrier of the conversion of TTZ4to TTZ2was relatively lower, and it is easy to realize.

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On the Development of the Creativity of Postgraduates

On 18/02/2015, in Economics papers, by rain

In view of the private Enterprise development reality in our country in the new time, this article analyzes the current existing questions of ideological and political work way in the private Enterprise, that is, the ideological and political work way lacks the innovation, the form is unitary, the content is arid, and the work itself lacks the attraction and the affection; The ideological and political work mechanism is not perfect, the work system has not been formed, the ideological and political work effect is not ideal. In view of these questions, exploring the private enterprise effective ideological and political work way in our country is the main point in this article. First, this article searches and analyzes the ideological and political Education way of seeping the humanist principle in the Management, in the humanist principle Management, we will transform the ideological and political Education work way from the”soft”request to the”hard”restraint, enhance the affinity between ideological and political Education hosts and visitors bodies, thus enhances ideological and political educational effects. Next, we will seep the influences of the ideological and political education subtly to the enterprise culture. Seeping the ideological and political education to the construction of the unifying enterprise values and the enterprise moral will cause the ideological and political work to be visible, emotional, sound and effective. Furthermore, we will transform the traditional ideological and political work ways by the network with interactive, ultra space-and-time and so on. Besides searching and analyzing ideological and political works way above, we should also establish the powerful ideological and political work mechanism, enlarge its rigid binding force, reduce its randomness and the capriciousness. Finally, we will indicate the significance of the innovation of the ideological and political work ways, besides regarding strengthening private enterprise ideological and political work, we also has the great significance to the society and solidating the economical foundation and the foundation in power of our party.

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According to the datum of the second grade leveling from 1987 to 199…

On 14/02/2015, in Economics papers, by rain

According to the datum of the second grade leveling from 1987 to 1998, significant land subsidence was found in Kunming city. The south Kunming city is the dominating area of land subsidence, whose total area is 180 km2, and has formed two very prominence infundibular areas. The one is located in Guangwecun-Xiaobanqiao-Wujiaba airport, the other is around Yuhucun-Fuhaicun. The most prominence subsidence area is Xiaobanqiao center, which amounted to 236.2mm(from 1987 to 1998). What’s more, the land subsidence is accelerating and expanding.In south Kunming city, stratum, lithographic characters, tectonics, geomorphology and neotectonism influence the groundwater’s existence, distributing and seepage. Void water is affluent in the lake deposit void of Cainozonic, which has multiplayer structure, and is discontinuous. Karst water is affluent in carbonatite rock formation of Palaeozoic, which formation are abroad, thick, and watery. The Karst water is the most important type of groundwater in South Kunming, and its water level is fleetly falling in some areas where lies a great number of pumping wells. On the other hand, in South Kunming, the Quaternary soil is soft and clayey, stratum structures vary a lot, the Engineering character of shallow soil is badness, and lacustrine-clay soil has marked anisotropy characteristic. In short, the hydrogeology conditions and the Engineering geology conditions are vital geological factors, which influence the occurrence and development of land subsidence, and lead it to be what it is currently.Groundwater pumping, Architecture loading, constructing, soil nature concretion and neotectonism are together playing an important role on land subsidence. Each complication has its connection with land subsidence: (1) Because the pattern of land subsidence in South Kunming is dislocation basin pattern, the interface between Quaternary soil and bed rock cannot separate ground water, so that the void water-bearing bed may communicate with karst water-bearing bed. Pumping karst water can render the concretion of Quaternary soil. Where the level of karst watermay communicate with karst water-bearing bed. Pumping karst water can render the concretion of Quaternary soil. Where the level of karst water falls a lot on the edge of basin, there is a prominence infundibular area. (2) With the city’s expanding, Architecture’s consistency and cubage increase swiftly and violently, and the proportion of newly-built architecture is most. What’s more, the Engineering character of shallow soil is badness, all of the above magnify the architecture loading’s effect on the land subsidence. (3) The infundibular area of land subsidence is located in the brim of lake basin, where is the area pristine Dianchi lake, and it is become land not long ago. The whole Quaternary Period lacustrine-clay soil is very soft, gravitational concretion is going on. On the other hand, lack peat’s oxidation accelerates concretion. (4) In the investigative area, Neotectonism is activities, which straightly result in the land subsidence. Because different complication has different effect, and the dominant complication is not fixedness. This paper introduce fuzzy judgment and classified analysis to probe into all of the complication, and working-out their shares as follow, pumping groundwater account for 72%, and architecture loading account for 11%, and constructing account for 7%, and soil nature concretion account for 9%, and neotectonism account for 1%.At last, based on the mechanism of land subsidence in South Kunming, this paper has forecasted the extendecy of the land subsidence, and putted forward some preventive advice.

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The Mechanism of Anti-TMV with Secondary Substances from Walnut Peel (Ⅰ)

On 12/02/2015, in Economics papers, by rain

Tobacco mosaic virus, causing huge losses to the production of tobacco, has become one of the main diseases. The paper preliminary studied on the active material from Walnut Seedcases on the inhibition of tobacco mosaic virus and anti-viral activity mechanism. The results were shown as follows:(1)Active tracking method is adopted to isolate antiviral activity substances from Walnut seedcases. The inhibition rat of the active component by chromatographic separation ,which is represtented by P4-2, reached 65.09%.The compound that is identified by IR,NMR is ursene(2)Mix the active component P4-2 with TMV and inoculated on the leaf of Nicotiana glutinosa after half hour, one hour and two hours by means of half-leaf, the concentration inoculated is 5mg.mL-1. The inhibition rate of necrotic local lesions were 38.86%, 62.34%, 64.55%. The result showed that P4-2 had the ability of inactivating TMV in vitro, and the inactivation time was positive relation.(3)The prevention experiment indicated that the inhibition rate of inhibiting multiplication of TMV 24h and 48h after inoculation are 48.82% and 51.19% .The effiency are better than Virus Conquer at the same dosage. Explained that the P4-2 had the ability of preventing infectivity of TMV.(4)The therapy experiment indicated that the effiencies are not very well.(5)The active component P4-2 inoculated on the leaf of the Nicotiana tabacum. After the 3ds, 6ds, 9ds and 12ds, the content of Chlorophyll, MDA, Flavonoid, Total phenols, PPO, POD, PAL and SOD,in Nicotiana tabacum was investigated. The results indicated that the compound could remarkedly increase the content of chlorophyll, flavonoid compared and total phenols with check, enhances the activity of PPOand POD ,PAL and SOD compared with check, and the content of MDA was markedly reduced than check. Explained that the P4-2 may through increase the content of chlorophyll, flavonoid and total phenols, enhances the activity of PPO, POD, PAL and SOD and reduces the content of MDA of lamina to strengthen the disease resistance of Nicotiana tabacum(6) By means of ultrathin section methods, the ultra-structure of leaves infected by TMV, was observed under electron microscope. The results of electron microscopic observation showed there are many virus particles, the ultra-structure of leaves were altered partly. After P4-2 treatment, TMV particle break up in large number, and TMV coat protein encapsidation was affected obviously, the disorganization of chloroplast and mitochondrion was mitigated, and P4-2 induced tobacco to produce a great deal of osmiumphilic bodies and velum bodies.

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A Study on the Mechanism of Community Emergency Management in Jianghai District of Jiangmen City

On 06/02/2015, in Economics papers, by rain

As the Basic unit in society, community plays an important role in managing Social affairsand contacting with the public and the government. And it has its foundation in EmergencyManagements(EMS). This thesis through literature research,and conducting research,on thebasis of summarizing both domestic and foreign experience in the practices of handlingdisaster-reduction construction and public participation in emergency Management, this papertakes the case of community emergency Management in Jianghai District of Jiangmen City asan object and carries out a research in the emergency management system, team members,capacity of risk resistance and the vulnerability, the level of emergency safeguard, publicconsciousness of risk prevention and self-rescue ability in natural disasters, accident, publichealth and Social safety, all the potential risk situation in Jianghai district. We will discuss therunning status of MEMS in community and the incompletion of system organizing, the shortageof resource,unreasonable allocation and the weakness of emergent capability. In order topromote the EMS in the district and improve community’s ability to combat risk,we shouldmake the suggestion to improve and optimize the EMS,make strong capacity of risk resistance.

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Study on the Rhythm of Population Suburbanization in Shanghai

On 22/01/2015, in Economics papers, by rain

Population suburbanization is an important shift of urban population’s distribution from centripetal congregation to centrifugal diffusion. Alike other natural geographical phenomena, it also contains rhythm, which means rhythmic and regulatory occurrence could be observed during its development. It is of great empirical and applied importance to study this rhythm.As the biggest metropolis in China, Shanghai has obvious suburbanization in population distribution. Adopting analysis of statistics and GIS, as well as other research methods of human geography, this study attempts to explore a general rule of the population suburbanization in Shanghai by observing time sequences from analyzing different stages of population distribution in Shanghai. It also discussed the interaction between Social-Economic development and population suburbanization. Analysis on the dynamic mechanism causing population suburbanization in Shanghai is also carried out and the observed rule and mechanism are validated by a detailed examination on population distribution changes of Pudong New District, an inner district of Shanghai.The following conclusions could be made through this study:Emergency of population suburbanization could be dated back to 1980s, symbolized by lower population growth of core districts, compared with that of outer districts. From then on, population suburbanization continuously developed outward, with presence of continuous decrease of population density gradient and shift from abruptness to plainness of Population Density Distribution Curve in term of space. Different from the mechanism of suburbanization in western cities, suburbanization in Shanghai was ahead of local Economic development. It was closely related with changes of governance regulations, urban planning, development of real estate market, infrastructure construction, and rebuilding of old residence region. As a part of Shanghai, Pudong New District was also observed with tendency of population of suburbanization, with presence of centrifuge population mobility.

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Synthesis and Properties of 1, 6-methano[10]annulene-3, 4-dicarboxylic Anhydride and Its Derivatives

On 17/01/2015, in Economics papers, by rain

Convenient synthesis of 1,6-methano[10]annulene-3,4-dicarboxylic anhydride had been accomplished in 78%yield by the process of saponification and acidification (at r.t.) of the starting material diethyl 1,6-methano[10]annulene-3,4-dicarboxylate. The new cyclic anhydride with high stability is yellow powder,and it can be used as a very important intermediate for the synthesis of 1,6-methano[10]annulene -3,4-disubstituted derivatives.To study in detail the properties of 1,6-methano[10]-annulene-3,4-dicarboxylic anhydride,1,6-methano[10]annulene-3,4-dicarboxylic anhydride with appropriate primary amine(aniline,benzylamine,benezenethylamine and n-butylamine ) under refluxing in acetic acid for 3 h to prepare corresponding N-substituted 1,6-methano[10]annulene-3,4-dicarboximide 64a~d,and their structures were characterized by IR,NMR,Ms and HRMs spectra.In this paper,all reactions embody the idea of green chemistry.In our synthetic route to 1,6-methano[10]annulene-3,4-dicarboxylic anhydride,after saponification of starting material,acidification of the product at r.t.to obtain the title compounds 1,6-methano[10]annulene-3,4-dicarboxylic anhydride,the dehydration of dicarboxylic acid in high temperature was avoided.Solvent-free synthesis of a series of N-amino substituted 1,6-methano[10]annulene-3,4-dicarboximide 65a~d had been accomplished in good yields by the following process:1,6-methano[10]annulene-3,4-dicarboxylic anhydride and appropriate hydrazines were heated to 170℃and reacted for 30 min under N2 atmosphere,and the structures of new compounds were characterized by NMR,Ms and HRMs spectra etc,and the condensation reaction was characterized with high yield,high atom Economic,low E factor and green by-product (the by-product in this reaction is H2O).Both mechanisms of synthesis of the target acid anhydrides by saponification of ester and acidification and the condensation reaction of 1,6-methano[10]annulene-3,4-dicarboxylic anhydride with appropriate primary amine,hydrazine were investigated. The results show that 1,6-methano[10]annulene-3,4-disubstituted derivatives were liable to form ring structure,especially five-membered ring rather than six-membered ring,under certain conditions due to the presence of both nucleophilic and electrophilic center.This above may be explained by the appropriate stereochemistry of 1,6-methano[10]annulene-3,4-positions,and some experiments were performed to verify the above mechanism.