Search

This paper research the 10 personal’s Chinese semi-affixes such as “人, 鬼, 汉, 师, 家, 生, 手, 星, 员, 长, among the intermediate phase of the Chinese Department State University of Surabaya in Indonesia in the form of questionnaires. At the same time, the condition of Indonesian students personal’s semi-affixes in the Chinese language was analyzed. This paper finds that within 10 Chinese personal’s semi-affixes mentioned, Indonesian students in the intermediate phases have mastered the personal’s semi-affixes: “师”, “员”, and “长”and the intermediate Indonesian students find “鬼”, “家” and “星” were most difficult. 摘要: 本文以印度尼西亚泗水国立大学中文系中间阶段中的“人、鬼、汉、师、家、生、手、星、员、长”等10个指人词缀的形式进行研究。 同时，对印尼学生汉语个人半词缀的情况进行了分析。 本文发现，在提到的10个中文指人词缀中，中级阶段的印尼学生已经掌握了指人词缀：“师”、“员”、“长”。 印尼中级学生觉得“鬼”、“家”、“星”最难。

The effect of upsetting and cogging Technique on Microstructure and mechanical properties of β-CEZ and Ti-38644 titanium alloys is studied in this paper. The results showed that β grain boundaries are not distinct and lath-shaped α phases precipitate in grains, for the β-CEZ and Ti-38644 alloys with single upsetting and cogging under the transus temperature. The grains are relatively coarse and their sizes are non-uniform. While for the β-CEZ and Ti-38644 alloys with multiple upsetting and cogging, the equiaxed microstructure become fine and uniform. β grain boundaries are very clear and small acicular and lath-shape α phase also precipitate in the equiaxed grains, and the microstructure difference is small between along transverse direction and longitudinal one. The multiple upsetting and cogging can significantly improve the reduction of area and the mechanical properties of β-CEZ and Ti-38644 titanium alloys with the refined and uniform grains.

Self-service technologies (SSTs) are largely introduced and promoted to replace traditional service encounters and researchers have been investigating the influencers of SST adoption. This paper incorporates the fresh perspective of customer perceived value and trust beliefs of service provider with technology acceptance model and then proposes a conceptual model. An empirical study is conducted to test the model and study the SST adoption in digital post service context. Six benefits and seven risks of digital post service are identified based on literature review and the characteristics of digital post service, and, together with the three trust dimensions, their influences on SST adoption are tested in the survey. The data collected in the survey is validated and analyzed to detect the relationships between benefits, risks, trust beliefs and SST adoption. Three benefits and two risks are proven to have significant influence on attitude toward using digital post service. Integrity of service provider is also found to positively influence consumers’ attitude. Besides, attitude toward using digital post service is a solid predictor of their intention to use the SST. Lastly the theoretical and managerial implications from the results are given as well as the suggestions for future research. nhhmas

Smooth axial fatigue tests were carried out at ambient temperature on one kind of near alpha titanium alloy named after Ti-600 at a frequency of 120–130 Hz and with two kinds of load ratios. The high cycle fatigue (HCF) strength for the solutioned and aged alloy is found to be 475 MPa fatigued with a load ratio R of 0.1, and which is 315 MPa with a load ratio R of −1. The observed high HCF strength for the samples fatigued with a load ratio R of 0.1 is attributed to its overlapping fine and thin plate like α + β phase microstructure. During the crack propagation region, at the same stress of 600 MPa, the sample with a fatigue life of 1.78 × 10 6 cycles has a better fatigue resistance than that of the sample with a fatigue life of 8.61 × 10 5 cycles, because of its smaller striation distance, its well-developed secondary cracks, more wider and coarsened α lathes precipitated at grain boundaries, and the heavily arranged interlacing transformed β microsructures. The average grain size of rare earth phases varies from several micrometers to 0.2 μm, no cracks corresponding to rare earth particles can be initiated.

In order to exploit the potential hot deformation ability of metastable β titanium alloy Ti-B19 the isothermal compression behavior was investigated by a Gleeble-1500 thermal simulator in the temperature range of 750–1000 °C at an interval of 50 °C and strain rate from 0.001 to 10 s−1. The results indicate that the flow stress of the alloy increases with increasing of the strain rate at a given temperature, and decreases with the increment of temperature at a given strain rate. The processing map for the alloy obtained at strain of 0.6 can be divided into three domains. The first is the one in the temperature range of 700∼800 °C and the strain rate range of 0.001–0.1 s−1, with a peak efficiency of 42% at about 750 °C and 0.01 s−1. The flow curves in this domain present a single peak or oscillation in the flow curves before continuous softening appears. The second is the one in the temperature range of 800–1000 °C and the strain rate range of 0.001–0.1 s−1, with efficiency from 29% to 36%. The flow curves in this domain present a single peak or oscillation in the flow curves before reaching steady state. Recrystallized structures can be found, which is a typical dynamic recrystallization zone. The third one is a flow instable domain at the temperature lower than 800 °C and the strain rate above 0.1 s−1, or at the temperature higher than 800 °C and strain rate above 10 s−1. The adiabatic shear bands (ASBs) and flow inhomogeneous zone of β phases can be observed.

Microstructures, properties and technical parameters of welding specimen of 0.5 mm thick sheets of commercial purity titanium (C.P. Ti) have been studied via high vacuum electron beam welding (EBW-HV), CO2 laser beam welding (LBW) and gas tungsten arc welding (TIG), as well as optical microscope (OM) observation and microhardness measuring. The results indicate that the EBW is more suitable for C.P. Ti sheets welding, and the welding seam without defects can be obtained. The tensile strength and microhardness of joints are corresponding to matrix structure. The full-penetration butt welds are obtained by TIG, but they have many defects such as wide weld-seam, big deformation and coarse grains. The LBW has many advantages such as the narrowest weld-seam, the least deformation and the finest grains. The fine grains are good for properties of weld seam, but the LBW should be studied again for the reasons of unstable welding technologies and strict condition.

The microstructure of palladium–yttrium alloys has been investigated in this paper, the two alloys were the Pd–7.52at.%Y alloy and Pd–8.22at.%Y alloy, respectively. The Pd–Y alloy ingots were prepared by melting the yttrium powder and palladium powder in a vacuum induction furnace. The resultant alloys were homogenized at 950°C for 6 h. Then cold rolled to produce foil. Some of them were quenched into water from 900, 920 and 940°C, respectively. Finally given a vacuum anneal at 750°C for 40 min and furnace cooled to produce the material in long-range-ordered (LRO) condition. There was an inflection on the curve of electrical resistance vs. temperature, which indicates that the anomaly electrical resistance variation is due to an order–disorder transition. The results of XRD show that Pd 3 Y typed LRO super-lattice existed in as-annealed samples. After annealing, the average grain size of Pd–8at.%Y alloys become smaller, the grains distribute unequally, and the grain scale for as-quenched and as-annealed samples was 750/mm 2 and 760/mm 2 , respectively. Microstructure was studied by optical and transmission electron microscopy. Anti-phase domain boundary (APB) was found in the as-annealed alloys. The cell-like structures in the TEM photo were not complete.