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Study on Preparation and Formation Mechanism of Composite Particles with Unusual Morphology

On 13/03/2015, in Economics papers, by rain

With the expansion of the use of particles with special morphology, higher requirements to the control of particle size and morphology emerged. Controlling the polymerization process as a whole has became insufficient to meet the needs of some conditions. So a deeper inquiry into the special morphology formation mechanism and introducing other mature producing methods into this system would be necessary and would greatly improve the controlling abilities.This paper firstly produced NIPAAm by ATRP method. After a comprehension of how to produce PNIPAAm with different molecular, we grafted double bond to the chain end via SN1 reaction. Also ln([M0]/[M]) to time curve did not fit the linearly relationship, it accorded basically with controlled polymerization. All the character methods indicated that double bond had been successfully grafted into the end of chain after SN1 reaction.Then this paper used terpolymerization of maromonomer and AN/St in the mixed media of water and ethanol to produce polymers with different morphologies, Changed the parameters of polymerization temperature and marcomonomer types and concentration to control the particle sizes and morphologies. The results indicated, marcomonomer and total monomer concentration has great influence to the paticle sizes and morphology. Temperature not only changed the morphology, but behaved more in influencing particle sizes and distribution. Both macromonomer and marcopolymer can produce special morphology, macromonomer has better efficacy.In the experiments of studying the special morphology formation mechanism, we firstly produced PSt microspheres in two different routines with two different theories, then we use these microspheres as the core material to produce particles with special morphology. We found out that, the first step of special morphology formation decided the particle sizes. This step has little relation with later steps, which means seeds could be in any sizes or could be produced by any methods. The projection numbers was determined when micro-regions of PAN were formed. The projection height was determined by the degree of deposited PAN chain in the second step. Separation of the projection formation mechanism can map a complex routine into some classical mechanism steps. Then it would be easier to introduce matured controlling methods into the special morphology formation procedure.

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Investigations of Photo-generated Cathodic Protection of the Composite Films of TiO2 Nanotubes

On 12/03/2015, in Economics papers, by rain

Titania (TiO2) is one of the most important semiconductor oxides because of its excellent photo-electrochemistry, photo-catalysis and good chemical stability. It can be used in many hi-tech applications including photocatalysis, gas sensors, solar cells, cathodic protection and etc. It is of great interest to develop TiO2 coatings or composites of nano TiO2 with other dopants on metals for the photogenerated cathodic protection of metals under ultraviolet (UV) or visible light illumination. However, the application of TiO2 nano coatings serving as anticorrosion measure has been limited by some technical bottleneck, including non uniform and defects for the coating. Especially, due to the wide band gap of TiO2 (Eg=3.0-3.2eV), it is only excited by ultraviolet light (λ< 390 nm) so that the efficiency of light utilization to solar irradiation is very low, and the recombination rate of photogenerated e--h+ pairs in TiO2 is high and the quantum efficiency is low. The technical problems result in the unefficient photocathodic protection performance of metals under both visible light illumination and dark conditions.The main goal and motivation of this thesis are to develop various uniform and functional nano TiO2 composite coatings, and to increase the quantum efficiency of TiO2 to both UV and visible light excitation. An attempt is made to extend the life of the photo-generated electron-hole pairs and to enhance efficient cathodic protection performances in UV-visible illumination and dark conditions. The mechanism of the photo-generated cathodic protection is also discussed in the thesis. The main results and conclusions are summaried as following:1. The sol-gel method and dip-coating technique have been developed to fabricate theultra fine particles coating of TiO2, TiO2-SnO2 and N-TiO2 at the room temperature.The size and thickness of TiO2 are crack-free, ultra purity and controllable, and the preparation method is simple and easy to be reproduced.2. It is shown that the as-prepared nano TiO2, films on metal own better anticorrosion performances, and the nano TiO2 films can suppress the recombination of photo-generated electron-hole pairs. The efficient photo-cathodic protection of the N doped TiO2 nanoparticle films is achieved under UV-visible wavelength spectra regions for the first time. It is indicated that the ultra fine nanoparticle coatings have a good quality of dual functions in anticorrosion of metals, that is, the corrosion protection as the barrier layers and photocathodic protection as a photoanode.3. Highly density and well aligned uniform titanium oxide nanotubes have been fabricated by electrochemical anodic oxidation of a pure titanium substrate in fluorinated electrolyte solutions. The morphologies, composition, structure and photoelectrochemical performances have been studied by using SEM, XRD, UV-Vis, electrochemical methods etc., and the photochemical properties of doped TiO2 nanotube arrays and their possible applications of anticorrosion for metals have been investigated systemically. It is noted that the TiO2 nanotubes show a stronger absorption in the ultraviolet (UV) light range, the open-circuit potentials of 316 SS coupled with the TiO2 nanotubes layers shift negatively under UV light irradiation (λ<380nm).4. The photocathodic protection of the Fe-doped TiO2-based nanotube layers has been evaluated through the electrochemical measurements under visible light irradiation and dark conditions. The effects of the electrolyte system, anodized time, heat treated temperature on its photoelectrochemical activity and photogenerated cathodic protection performances are emphatically investigated. It is found that the Fe-doped TiO2 nanotubes show a stronger absorption in the 410-650nm range. The open-circuit potentials of 316 SS coupled with the Fe-doped TiO2 nanotubes layers shift negatively under visible light irradiation (λ>400nm), and maintain negatively for a period even in dark condition. It is indicated that the Fe-doped TiO2 nanotube layers are able to function effectively a photogenerated cathodic protection for metals under regular sunlight conditions and remain a durative cathodic protection even in the dark condition.

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Evaluation of the Therapeutic Effect of Xiezhuo Chubi Decoction on Hyperuricemia and Its Influence on URAT1

On 10/03/2015, in Economics papers, by rain

Objects1.To evaluate the clinical effect and security of Xiezhuo Chubi decoction on Hyperuricemic patients, by observing the changes of indexes, including uric acid, clinical symptoms and indicators of safety.2. To investigate the effects of Xiezhuo Chubi decoction on uric acid level in Model of Hyperuricemic Mice, that to prove its effectiveness.3. To investigate the influence of Xiezhuo Chubi decoction on URAT1 gene in the kidney of Hyperuricemic Mice, that to search for the mechanism of reducing uric acid.Methods1.99 patients of Hyperuricemia were randomly divided into Xiezhuo Chubi decoction group, Benzbromarone group and Control group. The patients in Xiezhuo Chubi decoction group were treated by concentrated granules of Xiezhuo Chubi decoction. The patients in Benzbromarone group were treated by Benzbromarone tablets. The patients in Control group were treated without drugs. There were 20 days for a course of treatment. The clinical symptoms, physical signs and laboratory data before and after treatment were noted and compared.2.60 Kunming male mice of SPF grade were randomly divided into High-dose Xiezhuo Chubi decoction group, Medium-dose Xiezhuo Chubi decoction group, Low-dose Xiezhuo Chubi decoction group, Benzbromarone group, Model group and Control group. All mice were established with yeast method combined with uricase inhibition method to build Hyperuricemia model except Control group, and the corresponding drugs were administrated at the 7th day. On the 22nd day, the eyeballs of mice were removed and the blood was obtained to detect uric acid levels. Simultaneously, the kidneys were removed to detect mRNA expressions of URAT1 with Fluorescence quantitative PCR and RT-PCR.Results1. The significant decrease of the degree of uric acid was found in the three groups of Hyperuricemic patients after treatment (P<0.05). The total effective rate was 85.71% in Xiezhuo Chubi decoction,92.86% in Benzbromarone group, and 23.33% in Control group. There was no statistically significant difference between Xiezhuo Chubi decoction and Benzbromarone group (P> 0.0167). The effect in these two groups was similar, and was better than that in Control group (P<0.0167).2.The clinical symptoms of patients in Xiezhuo Chubi decoction group, included phlegm, lassitude, heaviness of limbs, dark urine and loose stool were improved significantly, and the urinary volume was increased after treatment (P<0.05).3. The laboratory data of patients in Xiezhuo Chubi decoction group, included blood routine, liver function, renal function and urine routine, were no significant difference after treatment (P>0.05).4. Imposed by different factors to each group, oral administration of Xiezhuo Chubi decoction could significantly reduce the uric acid in mice in a dose-dependent manner, and it was significant difference than that in Model group (P<0.05). The effects of High-and Medium-dose Xiezhuo Chubi decoction group were similar with Benzbromarone group (P>0.05), while the effect of Low-dose Xiezhuo Chubi decoction group was weaker than Benzbromarone (P< 0.05).5. Detected by Fluorescence quantitative PCR and RT-PCR, the mRNA expressions of URAT1 in the kidney of Hyperuricemic Mice were decreased significantly in High-, Medium-, Low-dose Xiezhuo Chubi decoction group and Benzbromarone group than that in Model group (P<0.05), but the effects of inhibition of Xiezhuo Chubi decoction were weaker than Benzbromarone (P< 0.05).Conclusions1.Xiezhuo Chubi decoction could reduce the uric acid and improve a part of clinical symptoms effectively in Hyperuricemic patients, while it is safety. 2. Xiezhuo Chubi decoction could reduce the uric acid effectively in Hyperuricemic mice. Its mechanism of reducing uric acid might be the action of inhibition to the mRNA expressions of URATl in the kidney of Hyperuricemic Mice.

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Kinetic Study on the Degradation of 4, 4′-Dinitrostilbene-2, 2′-disulfonic Acid

On 04/03/2015, in Economics papers, by rain

The air oxidation of p-nitrotoluene-o-sulfonic acid (NTS) under aqueous alkaline conditions to prepare 4,4′-dinitrostilbene-2,2′-disulfonic acid (DNS), which is the key procedure in the synthesis of 4,4′-diaminostilbene-2,2′-disulfonic acid (DSD). DSD is a valuable intermediate of fine chemicals. By now, just know that 4,4′-dinitrostilbene-2,2′-disulfonic acid will breakdown under some conditions and little know about kinetics and mechanism of the degradation. Therefore, the objectives of this paper include: the investigation of mechanism and kinetics of the degradation and the optimization of conventional process(air flow).The small scale experiments of DNS degradation process were performed with a home-made reactor with the volume of 4L. By monitoring the reactions with HPLC, the kinetic models of the degradation of 4,4′-dinitrostilbene-2,2′-disulfonic acid under differernt air flow were established, and the reaction order, reaction constant, activation energy and frequency factors were obtained. In addition, the change rules of reaction time, temperatures, hydroxide concentration were investigated by combining the mathematical model and experimental data.Base on carefully investigating the effects of oxygen partial pressure on the degradation ratio, the possible mechanism explaining the degradation of DNS is speculated: The degradation of DNS is a disproportionation reaction under aqueous alkaline conditions as well as reversible reaction. The oxygen in the reaction system will repress the positive reaction, but promote the negative reaction.Base on analysis the effect of air flow on the reaction’s rate, discover that appropriately lowering the flow of air within certain limits, will reduce energy consumption and costs.

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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.