Conditions of optimality of the divisional,the functional,and the matrix hierarchy of control

The model is considered of the multilevel hierarchical structure that controls a few “production lines” (sequential business-processes) with functional links by the kinds of performed operations. In the framework of the model many effects are investigated, which take place in practice, in particular, the dependence of optimality of the divisional, the functional, and the matrix hierarchy on the instability of the environment, the degree of standardization, the intensity of functional links, the horizontal and the vertical integration, etc.     

Alloying and microstructure stability in the high-temperature Mo-Si-B system

Multi-phase alloys in the Mo-Si-B system are identified as high-temperature structural materials due to their high melting points (above 2000 °C) and excellent oxidation resistance attributed to the self-healing characteristics of borosilica layer up to 1400 °C. In the current study, the effect of alloying additions to achieve a reduced weight density has been examined in terms of changes in the microstructure and phase stability. The critical factor underlying the microstructural changes is related to the influence of the alloying additions on the stability of the high melting temperature ternary-based Mo₅SiB₂ (T₂) borosilicide phase.     

Influence of asymmetric etching on ion track shapes in polycarbonate

By combining low-energy ion irradiation with asymmetric etching, conical nanopores of controlled geometry can be etched in polycarbonate (PC). Cone bases vary from 0.5 to 1 μm. Top diameters down to 17 nm are reached. When etching from one side, the pH on the other side (bathed in neutral or acidic buffer) was monitored. Etching temperature ranged from 65 °C to 80 °C. Pore shape characterization was achieved by electro replication combined with SEM observation. The tip shape depended on whether an acidic buffer was used or not on the stopped side.     

Numerical integration using Wang-Landau sampling

We report a new application of Wang-Landau sampling to numerical integration that is straightforward to implement. It is applicable to a wide variety of integrals without restrictions and is readily generalized to higher-dimensional problems. The feasibility of the method results from a reinterpretation of the density of states in statistical physics to an appropriate measure for numerical integration. The properties of this algorithm as a new kind of Monte Carlo integration scheme are investigated with some simple integrals, and a potential application of the method is illustrated by the evaluation of integrals arising in perturbation theory of quantum many-body systems.     

Design of the EPLD-based reconfigurable fault-tolerant systems with cell-level redundancy

A procedure to design reconfigurable systems capable to recover their operability in the case of fault of an arbitrary EPLD cell or connection was proposed. The most important advantages of the procedure lie in the retention of the signal propagation delays guaranteeing system operability after reconfiguration, as well as in low redundancy of the fault-tolerant system which at the limit may correspond only to one standby cell. The package methods enable one to design fault-tolerant systems based on the closed intelligent core without their upgrading. Efficiency of the procedure was estimated, and possible limitations of its application were discussed.     

创新铁路运输方式实现750m^3高炉富余铁水分流

针对750m^3高炉铁水生产富余状况，制订了富余铁水向铸铁机铸铁的调送方案，通过创新思维、系统挖潜、优化资源配置等措施的实施，保证了750m^3高炉的正常生产，取得了良好效果。     

Study on ancient Chinese imitated GE ware by INAA and WDXRF

Imitated GE ware was one of the most famous products of Jingdezhen porcelain field in Ming dynasty (AD 1368-1644). The exterior features of its body and glaze are very marvelous. Black foot, purple mouth and crazing glaze are the main features of imitated GE ware. Until now, the key conditions of resulting these features are not clearly identified. In order to find the critical elements for firing these features, instrumental neutron activation analysis (INAA) and wavelength-dispersive X-ray fluorescence (WDXRF) were used to determine the element abundance patterns of imitated GE ware body and glaze. The experimental data was compared with that of imitated Longquan celadon and of Longquan celadon. The analytical results indicated that Fe, Ti and Na were the critical elements. The body of imitated GE ware which contains high Fe and Ti are the basic conditions of firing its black body, black foot and purple mouth. The glaze of imitated GE ware which contains high Na is the main condition of producing its crazing glaze. Na is the critical element which enlarges the difference in expansion coefficients between the glaze and body of imitated GE ware. Furthermore, Zijin soil was added into kaolin to make the body rich in Fe and Ti. And something which was rich in Na was used to produce crazing glaze in the manufacturing process of imitated GE ware.