Materials Literature
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Abstract Ce‐doped LaMnO3 has complicated physical properties, such as unclear valence states of Ce and Mn ions, ferromagnetism–paramagnetism and metal‐insulator transitions, and multiphase coexistence. To explore the ground‐state properties of single‐phase La1−xCexMnO3 and obtain better understanding of the complicate…
Abstract 4,11‐Ethano‐4,11‐dihydro‐2H‐anthra[2,3‐c]pyrroles (IV) and the corresponding thiophene (VI) are prepared, and their thermogravimetric behavior is studied.
銅銦鎵硒(CIGS)薄膜太陽能電池為最具有量產潛力之一的材料，其效率高達20.1%，在薄膜太陽能電池中最為突出。但是真空製程會有成本過高、不容易大量生產等問題，近來如何在非真空的情況下鍍製CIGS，以降低生產成本成為研究重點之一。 本文利用非真空的方法，並且不同於一般需要在熱退火過程中不間斷地補充Se元素來硒化，更能夠降低整體的生產成本。把Cu2S、In2Se3、Ga與Se混和調製成CIGS前驅物溶液，在大氣下放置自行設計的石墨載具後，使其在快速熱退火中自行有硒化效果，時間僅需3分鐘，即可形成黃銅礦結構的CIGS。 另外，為了取代會有重金屬汙染問題的硫化鎘(CdS)，我們利用化學水浴沉積法來鍍製硫化鋅(ZnS)薄膜，接著在已經鍍有…
An analytical study is taken to investigate the relationship between material softening and structural softening through the use of a model problem in one dimension. With general nonlinear assumptions on the constitutive relations, it turns out that the governing equations can be viewed as a system of parametric equat…
Nanomechanical devices can operate at much higher speeds than their macroscopic analogues, due to low inertia. For example, peak speeds >100m/s have been predicted for carbon nanotube devices. This stimulates our interest in the atomic-scale physics of friction at high velocity. Here we study a model nanosystem consis…
A design method for a non-fragile repetitive control based on two-dimensional model is proposed for a class of linear discrete-time systems. The characteristics of the control and learning processes, as well as the uncertainties of repetitive controller and feedback controller are considered to establish a two-dimensi…
对层状钙钛矿型化合物SrBi 2 Nb 2 O 9 依次进行H + /(BiO) + , 四甲基铵离子TMA + /H + , 及锌氨络离子Zn(NH 3 ) 4 2+ /TMA + 多步离子交换而获得含Zn衍生物. X射线衍射(XRD)结果显示出质子化产物和含Zn衍生物的衍射图谱与前驱物SrBi 2 Nb 2 O 9 的层状结构上的差异. 组成分析表明, 前驱物质子化后, Bi原子几乎全被抽出, 但也有少量的Sr损失. 紫外?可见吸收(UV-Vis)测量发现, 含Zn衍生物的紫外吸收边比质子化产物和前驱物的紫外吸收边明显向高能方向移动.
Pada penelitian ini telah dilakukan sintesis Al-MCM-41, Zr -MCM-41, dan Zr-Al-MCM-41 dengan metode hidrotermal. Hasil sintesis dikarakterisasi menggunakan XRD, FT-IR, dan FT-IR piridin. Difraktogram XRD dari Zr-Al-MCM-41 ditandai dengan munculnya puncak-puncak karakteristik pada 2 sekitar 2,42-2,56; 4,06-4,25 dan 4…
In order to compensate the effect of hysteresis in piezoelectric actuators, a dynamic hysteresis model based on neural networks is proposed. In this method, a dynamic hysteretic operator is introduced to extract the memory property and rate-dependent property of hysteresis. The non-smooth property is also described in…
Lo studio è finalizzato a confrontare le modalità di trattamento delle scorie da RSU, per verificare le performance ambientali dei diversi sistemi analizzati. Vengono considerati il trattamento delle scorie in discarica e due trattamenti alternativi, uno che prevede di utilizzare le scorie pretrattate per la produzion…
Questo documento riporta quanto elaborato da Valentina Fantin per la partecipazione al Premio Giovani Ricercatori LCA, tenutosi all'interno del Convegno della Rete Italiana LCA che si è svolto a Padova nell' Aprile 2010.
In terms of the relationship between penetration depth and acceleration and the relationship between explosive loading mass and optimum explosive depth, the control model of optimum detonation is gained. Based on DSP, a whole HIL simulation system is set up, while simulates the projectile's setting information and acc…
以铝(Al)粉末和三氯化硼(BCl 3 )为前驱体, 以H 2 和Ar分别作为还原气体和保护气体, 在高温水平电炉中采用化学气相沉积方法在Si衬底上原位制备了大量的AlB 12 纳米棒. 利用扫描电镜(SEM), 高分辨透射电镜(HRTEM), 选区电子衍射(SAED), 能谱(EDS)表征了AlB 12 纳米棒的形貌、晶体结构和成份. SEM结果表明纳米棒的直径在100~350 nm之间, 长度从几百个纳米到几个微米, TEM、SAED和EDS结果显示AlB 12 纳米棒沿着[020]方向生长. 最后根据纳米线生长过程探讨了AlB12纳米棒的自催化生长机理.
The least squares support vector machines (LS-SVMs) are proposed for hysteresis system modeling in this investigation. The historical information of hysteresis system is used as a part of the input signals of the LS-SVMs so that the many-to-one mapping of hysteresis system is transformed into a one-to-one mapping. Uti…
Combining the pointwise integral mechanism, the inequality approach with the parameter regrouping technique, a novel repetitive learning control for high-order nonlinearly parameterized systems with disturbances is proposed. It can be applied to the time-varying parametric uncertainty systems with unknown compact set,…
Une nouvelle occurrence de duhamelite, Cu4Pb2Bi(VO4)4 (OH)3. 8 H2O, est signalee dans le gisement cupro-cobaltifere de Mashamba, Shaba, Zaire. Le mineral est decrit et compare a l'espece originale de Payson, Arizona.
Abstract Review: 52 refs.
In this article, reference 47 contains an incorrect author name and the wrong journal has been cited. The correct reference is given below. The authors apologize for this mistake.
We consider a two-dimensional system in which a dilute stream of particles collides with an oblique planar wall. Both collisions between particles and collisions between particles and the wall are inelastic. We perform numerical simulations in two dimensions and show that the mean force experienced by the wall can be…
Abstract AgCuF3 is synthesized by solid state reaction of AgF and CuF2 (773 K, 3 d).