摘要：Lightweight design is important for the Thermal protection System(TPS) of hypersonic vehicles in that it protects the inner structure from severe heating environment. However, due to the existence of uncertainties in material properties and geometry, it is imperative to incorporate uncertainty analysis into the design optimization to obtain reliable results. In this paper, a six sigma robust design optimization based on Successive Response Surface Method(SRSM) is established for the TPS to improve the reliability and robustness with considering the uncertainties. The uncertain parameters related to material properties and thicknesses of insulation layers are considered and characterized by random variables following normal distributions. By employing SRSM, the values of objective function and constraints are approximated by the response surfaces to reduce computational cost. The optimization is an iterative process with response surfaces updating to find the true optimal solution. The optimization of the nose cone of hypersonic vehicle cabin is provided as an example to illustrate the feasibility and effectiveness of the proposed method.

摘要：Patterns of spatial development and protection form a basic category of geoscience,and redesigning them is a popular subject of research in regional sustainable development that is important for ecological civilization *** authors here report a case study of Wuhan city using the circuit theory model and minimum cumulative resistance(MCR)model to rebalance its spatial protection and *** results show the following:(1)Using the density of the gross domestic product(GDP),density of population,rate of urbanization,and access to transportation as evaluation indicators,seven core areas of development in Wuhan were identified,accounting for 59%of the total number of streets,that exhibited a “circular-satellite”spatial structure.(2)According to the importance of ecosystem services,ecological sensitivity,land use type,and slope of the terrain,the resistance surface of spatial development in Wuhan had a stereoscopic spatial form of an“inverted pyramid,”with high surroundings and a low *** area of low resistance accounted for 6.64%of the total area of Wuhan.(3)Based on coupling analysis using the MCR and spatial morphological characteristics of current,nine axes of spatial development with a total area of 427.27 km2 and eight key strategic points with a total area of 40.02 km2 were *** that were prioritized for development accounted for 9.63%of Wuhan's total area.(4)By combining the characterization of the development axis with the structure of the three-level core area,we extracted the structure of spatial development of "one heart,two wings,and three belts" in *** research framework and empirical results can provide scientific guidance for the urban spatial layout,the development of regional linkages,and ecological environmental protection in China.

摘要：The marine ecological cultural heritage demonstrates tiie long-standing wisdom of human marine ecological culture. Its effective protection and inheritance is a continuation of the traditional marine ecological lifestyle, and is also an important impetus to the current construction of marine ecological civilization in China. The paf ticipation and interaction of cultural origins should be pfomoted, system protection management systems should be continuously improved, policies, reguktions and supporting mechanisms should be improved, and scientific evaluation mechanisms should be established, gradually realizing innovative development.

摘要：The Chinese poet monk Hanshan(寒山)advocated ahimsa,beings protection and vegetarian diet etc.,aiming to spread beings protection doctrines of Buddhism through his *** contemporary American poet Gary Snyder is influenced deeply by Hanshan’s works and his life style,and Snyder develops his holism on environment protection,which is rightly based on Hanshan’s beings protection thoughts combining Indians’nature worship tradition.

摘要：Concept of urban renewal was elaborated,which for the protection of historic and cultural heritage not only provides a favorable opportunity of integrating neighboring environment and improving protection conditions,but also imposes threats such as destroying its historic images and patterns,degrading of survival *** properly protect historic and cultural heritage in the unceasing urban renewal,and make it a significant resource and feature of the city but not a barrier of urban development,empirical analysis and theoretical research were adopted to analyze and study current conditions and problems of the protection of historic and cultural heritage in Xi'an City from the dimension of urban renewal concept and present urban renewal of Xi'***,through summarizing successful experience of other regions,specific strategies were given to protect historic and cultural heritage of Xi'an City in its urban renewal more scientifically and reasonably.

摘要：By adopting combined method of zoning protection and sorting protection,protection and cultivation planning of Songhua River Wetland in Harbin had been *** emphasized that diversity and stability of resources should be protected,completeness and originality of resources be protected and ecological system be recovered and *** this basis,different protection and development strategies had been carried out on different zones including ecological landscape protection zone,natural landscape protection zone,scenery recovery zone,scenery appreciating zone and development control zone;and then specialized cultivation planning had been conducted on wetland resource,animal resources,water landscape,wetland recovery and so *** the same time,it should control peripheral protection belt,so as to highlight urban landscape pattern of "river·island·city",and realize harmonious development target of "people·landscape·city".It stressed that protection and cultivation of valuable urban wetland resource were important contents of urban ecological *** should introduce new theories and methods into researches on theories and concrete methods according to local conditions,so as to effectively conduct protection and planning,and propose scientific and operational suggestions for later planning.

摘要：It is of great practical significance to study and protect the East Asian Maritime Cultural Routes Heritage. This is conducive to a profound understanding of the spirit of the East Asian region, especially traditional Chinese marine culture, and the maintenance of peace and order in East Asia and the world as a whole. But at present, some problems increase the difficulty for the protection of East Asian Maritime Cultural Routes Heritage, for example, improper development and utilization in the process of urbanization, imperfection of the management mechanism, multiplicity of the ownership of the estate. Propose to carry out a survey of the East Asian Maritime Cultural Routes Heritage as soon as possible, build regional integration cooperation mechanism, improve the marine cultural heritage protection technology, perfect the relevant laws and regulations.

摘要：This paper proposes an efficient, high-tech method of construction of pseudorandom binary sequences generators with a repetition period 2n?for n-bit shift register with a nonlinear feedback function. The developed method is illustrated by constructing a nonlinear function feedback shift register. It is proved that the offered method requires the realization of a memory size proportional to n2?that allows making successful use of suitable generators for practical use on the shift register of the longer word.

摘要：As the power electronics technology is widely used in the power system, it may also bring the DC component to the transformer operation, resulting in DC bias and may cause great harm to the transformer. In this article, the device to protect transformer from DC magnetic bias is designed. On the basis of load DC current, a magnetic bias protection device is developed by combination of current sensor, electric information collection circuit, signal filtering circuit, signal modulating circuits, fault feature judging circuit, automatic range tracking circuit, intelligent logic synthesis unit and implementation output circuit. By operating in temperature-rise test equipment in the high power electronic lab, the device is proved with reliability, high sensitivity and worthy of promotion and application.

摘要：This paper presents and tests three earthing systems (TT, TN and IT) for Micro-Grid (MG) protection against various fault types when the MG transferred to the islanding mode. The main contribution of this work is including the models of all micro sources which interfaced to the MG by power electronic inverters. Inverters in turns are provided with current limiters and this also included with the inverter models to exactly simulate the real situation in the MG during fault times. Results proved that the most suitable earthing system for MG protection during the islanding mode is the TN earthing system. That system leads to a suitable amount of fault current sufficient to activate over current pro-tection relays. With using TN earthing system, touch voltages at the faulted bus and all other consumer’s buses are less than the safety limited values during islanding mode. For the two others earthing systems (TT and IT), fault currents are small and nearly equal to the over load currents which make over current protection relay can not differentiate between fault currents and overload currents. All models of micro sources, earthing systems, inverters and control schemes are built using Matlab?/Simulink? environment.