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1.
Kinetic equations for initial sintering were obtained by combining the conventional kinetic equation with an empirical expression for grain growth in the initial stage. The equations describe the isothermal shrinkage of ZnO in O2 at 80 torr and 800° to 950°C. The equation also successfully analyzed the sintering of powder compacts of Al2 O3 studied by other workers. 相似文献
2.
Information filtering is an intelligent function that selects the relevant messages and items of use or interest to the user from a large amount of incoming information. This function has become very important for the rapid development of network technology. This article focuses on information filtering for the management of emergency situations. We believe that special purpose-built "information filtering systems" should be developed to cope with the problem of information overload in emergency management. In this article, we first investigated features of information in emergent situations and then proposed an information filtering system for emergency management. The proposed system is composed of two parts: causal analysis and information classification. A prototype system has been developed and its effectiveness was evaluated by experiments. 相似文献
3.
This paper presents a novel type of flux‐modulating synchronous machine (FMSM) in which permanent magnets (PMs) are embedded in the stator back‐iron. The rotor has neither windings nor PMs. A prototype machine with an outer‐rotor configuration was designed and manufactured to validate the operating principle of the FMSM. The characteristics in the motor mode of the prototype machine were also investigated with a vector control system. The results of the investigations show that, as in surface‐mounted PM motors, the torque of the FMSM is predominantly generated by the PM flux and can be controlled using the armature current. 相似文献
4.
TOSHIJI KATO KAORU INOUE YUSUKE AKIYAMA KOKI OHASHI 《Electrical Engineering in Japan》2017,200(2):34-42
A grid‐connected inverter is indispensable for photovoltaic power generation and smart grid systems, and it must be designed for stable operation. The impedance method based on the Nyquist criterion is often utilized to analyze the stability of grid‐connected inverter systems. The impedance method is based on the eigenvalues of the product of the inverter output admittance and the line impedance matrices in the frequency domain. However, the frequency characteristics have so far been derived only for inverters with analog control systems. A new frequency analysis method for inverters with digital control systems is proposed in this paper. First, a stability analysis example for a three‐phase LCL‐type inverter controlled digitally is shown and the results are compared and validated with those by simulation using a Saber simulator. Finally, they are also compared and validated with experimental results digitally controlled by a DSP‐based system. 相似文献
5.
HIDEKI KISHIMURA YUSUKE TOKUDA SAPPASITH KLOMKLAO SOOTTAWAT BENJAKUL SEIICHI ANDO 《Journal of Food Biochemistry》2006,30(4):466-477
Trypsin was purified from the pyloric ceca of spotted mackerel (Scomber australasicus) by gel filtration on Sephacryl S‐200 and Sephadex G‐50. The purification and yield were 20‐fold and 81%, respectively, as compared to those in the starting crude extract. Final enzyme preparation was nearly homogeneous in sodium dodecyl sulfate–polyacrylamide gel electrophoresis (SDS–PAGE) and the molecular weight of the enzyme was estimated to be 24,000 Da by SDS–PAGE. The trypsin was stable at pH 5–11 for 30 min at 30C, and its maximal activity against Nα‐p‐tosyl‐L‐arginine methyl ester was pH 8.0. Trypsin was heat‐stable up to about 50C for 15 min at pH 8.0. Optimum temperature of the trypsin enzyme was 60C. The enzyme was stabilized by calcium ion. The purified trypsin was strongly inhibited by serine protease inhibitors such as N‐p‐tosyl‐L‐lysine chloromethyl ketone and soybean trypsin inhibitor, suggesting that it is a trypsin‐like serine protease. N‐Terminal amino acid sequence of spotted mackerel trypsin was IVGGYECTAHSQPHQVSLNS. 相似文献
6.
Several characteristic equations in intermediate sintering dependent on a grain-growth mechanism were quantitatively estimated using the microstructural data of sintered compacts. The relations which were calculated with a computer based on many assumptions described well the changes of a pore-size distribution, of an average radius of grains, and of a specific surface area of an easily sinterable alumina during the sintering. The reasonableness of these assumptions is discussed. 相似文献
7.
Ordinary corn kernel endosperm is composed of horny and floury portions. Corn varieties having different endosperm were investigated. Their chemical composition was almost identical, but in tissue structure the floury endosperm is soft and the horny endosperm is hard. The starch isolated from floury endosperm is easier to gelatinize, and higher in viscosity, swelling value, and α-amylase digestibility than the starch from horny endosperm. The floury endosperm is superior to the horny endosperm in such baking products as bread and cookies. 相似文献
8.
The complicated texture of a thin sheet of MgO and MgO-doped Al2 O3 (∼15 pm) was statistically resolved into four typical grain geometries. Grain size distribution was related to the ratio of expressions describing the growth (or shrinkage) of individual grains and the growth of grains of average size R. Grain-growth data for MgO indicate that the mobility of a grain boundary is independent of R (parabolic-grain-growth behavior) but depends strongly on the ratio of individual grain size to average grain size. When mobility is proportional to 1/R, the time dependence of grain growth is <1/2. 相似文献
9.
CHARACTERISTICS OF TWO TRYPSIN ISOZYMES FROM THE VISCERA OF JAPANESE ANCHOVY (ENGRAULIS JAPONICA) 总被引:2,自引:0,他引:2
HIDEKI KISHIMURA KENJI HAYASHI YUSUKE MIYASHITA YOSHIYUKI NONAMI 《Journal of Food Biochemistry》2005,29(5):459-469
Two isozymes of trypsin (TR‐I and TR‐II) were purified from the viscera of Japanese anchovy (Engraulis japonica) by gel filtration and anion‐exchange chromatography. Final enzyme preparations were nearly homogeneous in sodium dodecyl sulfate‐polyacrylamide gel electrophoresis (SDS‐PAGE), and the molecular weights of both enzymes were estimated to be 24,000 Da by SDS‐PAGE. The N‐terminal amino acid sequences of the TR‐I, IVGGYECQAHSQPHTVSLNS, and TR‐II, IVGGYECQPYSQPHQVSLDS, were found. Both TR‐I and TR‐II had maximal activities at around pH 8.0 and 60C for hydrolysis of Nα‐p‐tosyl‐L‐arginine methyl ester hydrochloride. The TR‐I and TR‐II were unstable at above 50C and below pH 5.0 and were stabilized by calcium ion. 相似文献
10.
HIDEKI KISHIMURA YUSUKE TOKUDA SAPPASITH KLOMKLAO SOOTTAWAT BENJAKUL SEIICHI ANDO 《Journal of Food Biochemistry》2006,30(5):521-534
Trypsins from the pyloric ceca of two fish species, yellow tail (Seriola quinqueradiata) and brown hakeling (Physiculus japonicus) were purified by a series of chromatographic separations. Purity increased 62‐ and 106‐fold with approximately 55 and 10% yield for yellow tail trypsin and brown hakeling trypsin, respectively. Final enzyme preparations were homogeneous in sodium dodecyl sulfate‐polyacrylamide gel electrophoresis (SDS‐PAGE), and the molecular weights of both enzymes were estimated to be 24 kDa by SDS‐PAGE. Yellow tail and brown hakeling trypsins had maximal activity at pH 8.0 for hydrolysis of Nα‐p‐tosyl‐L‐arginine methyl ester hydrochloride and was unstable at acidic pH. The optimum temperatures for yellow tail and brown hakeling trypsins were 60 and 50C, respectively. Yellow tail trypsin was stable up to 50C, whereas brown hakeling was stable up to 40C. Both trypsins were stabilized by calcium ions. The activities of both trypsins were strongly inhibited by soybean trypsin inhibitor and Nα‐p‐tosyl‐L‐lysine chloromethyl ketone hydrochloride, and were partially inhibited by ethylenediaminetetraacetic acid. The N‐terminal amino acid sequences of yellow tail trypsin and brown hakeling trypsin were determined as IVGGYECTPYSQPHQVSLNS and IVGGYECPKHSQPHQVSLNS, respectively. 相似文献