Macro-analysis of Errors Made by Junior Middle School Students

This study collects 3896 errors made by junior middle students in Xining.Then they are classified into interlingual errors and intralingual errors and a macro-analysis is done to discover the possible causes behind these errors.This research comes to the following conclusions:First,a large number of the errors made by the students are intralingual errors rather than interlingual ones.Secondly,the students at elementary levels produce more interlingual errors than those at intermediate or advanced levels.Conversely,the students at intermediate or advanced levels produce more intralingual errors.Thirdly,errors can have more than one source.

Urbanization Response Macro-analysis of Underdeveloped Hilly Areas in Central China

By investigating urbanization process of a typical village in Xinyang City, Henan Province, urbanization response characteristics and driving mechanism of underdeveloped hilly area were explored from the perspectives of population, economy, landscape and society. The results showed that reform of government macro-policy is a fundamental driving force for the urbanization of underdeveloped hilly area in central China which then is co-promoted by economic development and social needs. During the urbanization, rural population is transferred locally or to the neighboring areas, traditional agriculture is gradually transferred to professional and characteristic agriculture. Non-agricultural economy has become a major income source of the locals, and also a major force for shaping rural economic spaces and natural landscapes, leading to the binary landscape layout of village. Weights of environment and traffic are improved in selecting relocation site for rural households, traditional affinity and neighborhood relationship is weakened, spatial differentiation of social and economic structures in the village is enhanced, which are all new tokens of the villagers' values and life concepts, and will lead to the further urbanization.

Web-Based Data Management and Sharing System for Electron Proke Micro-analysis

This paper proposes a useful web-based system for the management and sharing of electron probe micro-analysis( EPMA)data in geology. A new web-based architecture that integrates the management and sharing functions is developed and implemented.Earth scientists can utilize this system to not only manage their data,but also easily communicate and share it with other researchers.Data query methods provide the core functionality of the proposed management and sharing modules. The modules in this system have been developed using cloud GIS technologies,which help achieve real-time spatial area retrieval on a map. The system has been tested by approximately 263 users at Jilin University and Beijing SHRIMP Center. A survey was conducted among these users to estimate the usability of the primary functions of the system,and the assessment result is summarized and presented.

Macro-Analysis on Across-Fault Crustal Deformation Measurement Data Along the Northern Edge of the Qinghai-Xizang Block

Based on the arrangement of the across-fault measurement data along the northern edge of the Qinghai-Xizang block,we divide the deformation into different types and probe the nature of various fault movements based on these types.The recent situation of tectonic movement of main structural belts and seismicity in this area are expounded.From the above,it is concluded that across-fault measurement can reflect not only the conditions of fault movement nearby but also the change of regional stress fields; not only is this a method to obtain regional seismogenic information and to conduct short-term prediction but it is also involved with large scale space-time prediction of moderate and strong earthquakes on the basis of the macro characteristics of fractures.

Brine-freeze-thaw Durability and Crack Density Model of Concrete in Salt Lake Region

The brine-freeze-thaw durability (defined as the durability under freeze-thaw cycles in Qinghai salt lake brine) of concrete (ordinary Portland cement concrete (OPC), high performance concrete (HPC-a), high performance concrete with steel fiber (HPC-b), and high performance concrete with high Young's modulus polyethylene fiber (HPC-c)) was systematically investigated by the relative dynamic elastic modulus, the relative mass, the appearance, the scanning electron microscopy, and the X-ray diffraction. In addition, the low-temperature physical and chemical corrosion mechanism and a crack density model after the modified relative dynamic elastic modulus being taken into consideration were proposed. The results show that the deterioration of OPC is the severest, followed by HPC-a, HPC-c and HPC-b. The admixture or the fiber is mixed into concrete, which can improve the brine-freeze-thaw durability of concrete. The critical mass growth of the failure of concrete is 3.7%. The cause of the deterioration of concrete under the brine-freeze-thaw cycles is physical and chemical corrosion, not freezing and thawing. The crack density model can effectively describe the deterioration evolution of concrete.

Modification of NiCoCrAlY with Pt: Part Ⅰ. Effect of Pt depositing location and cyclic oxidation performance

Pt layers of 5 μm in thickness were electroplated before or after depositing NiCoCrAlY coating by arc ion plating(AIP) aiming for identifying the effect of Pt enriching position on microstructure and cyclic oxidation behavior of Pt modified NiCoCrAlY coatings. Al-rich zones formed at the same position of Ptrich zones for both modified coatings due to uphill diffusion of Al driven by Pt. Cyclic oxidation tests at 1000 and 1100?C indicated that oxidation resistance of NiCoCrAlY was improved by Pt modification via different mechanisms: at surface, Pt-rich zone promoted selective oxidation of Al to form α-Al_2O_3,whilst at coating/substrate interface Pt-rich zone acted as effective diffusion barrier for titanium. Roles of Pt played in enhancing the oxidation performance of various Pt-modified NiCoCrAlY coating were investigated.