日本散藏吐鲁番出土文献中的《辽藏》残片

《西域考古图谱》所刊,日本京都龙谷大学图书馆、东京台东区立书道博物馆、静嘉堂文库、大阪四天王寺出口常顺所藏吐鲁番出土文献中有不少《辽藏》残片。其或属大谷探险队收集品,或为梁素文等人旧藏,并能与旅顺博物馆、中国国家图书馆、德国国家图书馆等馆藏缀合。通过全面梳理比定并作缀合,该部分《辽藏》残片的价值可得彰显。

广禅侯与元代山西之牛王崇拜

牛王被称为“广禅侯”者 ,不只临汾市魏村牛王庙。关于广禅侯的来历 ,见诸正史的是宋真宗到泰山封禅时所加号的“亭山神庙” ,但是否与牛王有关 ,有待确证。种种迹象表明 ,被封为“广禅侯”的牛王 ,很可能是传闻因医治宋兵战马有功而被宋徽宗加封的阳城县山头村牧医常顺 ,后来被进一步神化和衍化。在元代的山西 ,大量广禅侯庙的建立 ,与普通百姓崇拜牛王的心理有关 。

从沁河流域水草神信仰看传说、历史与民众心理的关联

通过正式敕封抑或假借敕封这样的“正统化”方式,民间信仰与王朝的历史关联了起来。沁河流域流传着兽医常顺被宋徽宗敕封为广禅侯,元太宗为其建立水草庙的传说。在对水草神信仰考察的基础上,发现民间流传的宋代常顺被敕封、加以“正统化”的故事反映了当时沁河流域作为边界地区的复杂族群关系;而元代广禅侯庙的兴建,则与马在蒙古族中的重要地位有关;明清时期,马、牛王神崇拜的高度发达,以及广禅侯“官祭”的程式化,与农耕文明中农业的重要地位有关,同时也展示了普通百姓对于六畜兴旺、风调雨顺的期盼。而从广禅侯到水草神,再到其信仰圈的扩大,背后所体现的是民间信仰和国家意志的整合。

A tetragonal tungsten bronze-type photocatalyst:Ferro-paraelectric phase transition and photocatalysis

Although ferroelectrics have potential applications in photocatalysis due to their highly efficient charge separation, their mechanism of charge separation is still unknown. A ferroelectric Sr0.7Ba0.3Nb2O6 （SBN‐70） semiconductor with a low ferro‐paraelectric phase transition （65℃） was studied. The photocatalytic activity for H2 production by ferroelectric and paraelectric SBN‐70 was examined. The spontaneous polarization in the ferroelectric phase strongly affected the photocata‐lytic performance and parallel ferroelectric domains significantly promoted photogenerated charge separation to result in better photocatalytic H2 production. This knowledge provides an important basis for the fabrication of ferroelectric photocatalysts with improved charge separation ability.

Fatigue damage evaluation by metal magnetic memory testing

Tension-compression fatigue test was performed on 0.45% C steel specimens.Normal and tangential components of magnetic memory testing signals,Hp(y) and Hp(x) signals,with their characteristics,K of Hp(y) and Hp(x)M of Hp(x),throughout the fatigue process were presented and analyzed.Abnormal peaks of Hp(y) and peak of Hp(x) reversed after loading; Hp(y) curves rotated clockwise and Hp(x) curves elevated significantly with the increase of fatigue cycle number at the first a few fatigue cycles,both Hp(y) and Hp(x) curves were stable after that,the amplitude of abnormal peaks of Hp(y) and peak value of Hp(x) increased more quickly after fatigue crack initiation.Abnormal peaks of Hp(y) and peak of Hp(x) at the notch reversed again after failure.The characteristics were found to exhibit consistent tendency in the whole fatigue life and behave differently in different stages of fatigue.In initial and crack developing stages,the characteristics increased significantly due to dislocations increase and crack propagation,respectively.In stable stage,the characteristics remained constant as a result of dislocation blocking,K value ranged from 20 to 30 A/(m·mm)-1,and Hp(x)M ranged from 270 to 300 A/m under the test parameters in this work.After failure,both abnormal peaks of Hp(y) and peak of Hp(x) reversed,K value was 133 A/(m·mm)-1 and Hp(x)M was-640 A/m.The results indicate that the characteristics of Hp(y) and Hp(x) signals were related to the accumulation of fatigue,so it is feasible and applicable to monitor fatigue damage of ferromagnetic components using metal magnetic memory testing(MMMT).

Unsteady RANS and detached eddy simulation of the multiphase flow in a co-current spray drying

A detached eddy simulation(DES) and a k-ε-based Reynolds-averaged Navier–Stokes(RANS) calculation on the co-current spray drying chamber is presented. The DES used here is based on the Spalart–Allmaras(SA) turbulence model, whereas the standard k-ε(SKE) was considered here for comparison purposes. Predictions of the mean axial velocity, temperature and humidity profile have been evaluated and compared with experimental measurements. The effects of the turbulence model on the predictions of the mean axial velocity, temperature and the humidity profile are most noticeable in the(highly anisotropic) spraying region. The findings suggest that DES provide a more accurate prediction(with error less than 5%) of the flow field in a spray drying chamber compared with RANS-based k-ε models. The DES simulation also confirmed the presence of anisotropic turbulent flow in the spray dryer from the analysis of the velocity component fluctuations and turbulent structure as illustrated by the Q-criterion.

Theoretical analysis of the velocity field, stress field and vortex sheet of generalized second order fluid with fractional anomalous diffusion

The velocity field of generalized second order fluid with fractional anomalous diiusion caused by a plate moving impulsively in its own plane is investigated and the anomalous diffusion problems of the stress field and vortex sheet caused by this process are studied. Many previous and classical results can be considered as particular cases of this paper, such as the solutions of the fractional diffusion equations obtained by Wyss; the classical Rayleigh’s time-space similarity solution; the relationship between stress field and velocity field obtained by Bagley and co-worker and Podlubny’s results on the fractional motion equation of a plate. In addition, a lot of significant results also are obtained. For example, the necessary condition for causing the vortex sheet is that the time fractional diffusion index β must be greater than that of generalized second order fluid α; the establiihment of the vorticity distribution function depends on the time history of the velocity profile at a given point, and the time history can be described by the fractional calculus.