Preparation, characterization and gas-sensitive properties of nano-crystalline Cr_2O_3-Fe_2O_3 mixed oxides

Ｆｅｒｒｉｃｏｘｉｄｅ(αＦｅ2Ｏ3),ｃｈｒｏｍｉｃｏｘｉｄｅ(αＣｒ2Ｏ3)ａｎｄｔｈｅｉｒｍｉｘｅｄｃｏｍｐｏｕｎｄｓｈａｖｅｉｍｐｏｒｔａｎｔａｐｐｌｉｃａｔｉｏｎｉｎｍａｎｙｆｉｅｌｄｓ.Ｆｏｒｉｎｓｔａｎｃｅ,ｔｈｅｙｃａｎｂｅｕｓｅｄａｓｃａｔａｌｙｓｔｓｆｏｒｈｉｇｈｔｅｍｐｅｒａｔｕｒｅｗａｔｅｒｇａｓｓｈｉｆｔｒｅａｃｔｉｏｎ[1]ａｎｄｒｅｄｕｃｔｉｏｎｏｆＮＯｘｂｙＮＨ3[2],ａｓｒｅｆｒａｃｔｏｒｙｍａｔｅｒｉａｌｓ[3]ａｎｄｓｅｎｓｉｎｇｍａｔｅｒｉａｌｓ[4,5],ａｎｄｓｏｏｎ.Ｓｉｎｃ…     

Decay of 1.643 h <Superscript>95</Superscript>Ru and its daughter's level structure

The decay of ⁹⁵Ru has been investigated by means of γ-ray spectroscopy. The ⁹⁵Ru nuclei were produced by the reaction ⁹²Mo( α, n) ⁹⁵Ru at a beam energy of 17MeV. High-purity Ge detectors have been used singly and in coincidence to study γ-rays in the decay of ⁹⁵Ru to ⁹⁵Tc. 132 γ-rays are reported, among them, energies and intensities for 127 transitions have been determined. A decay scheme of ⁹⁵Ru with 31 levels is proposed which accommodates 127 of these transitions. Spins and parities for three new levels are proposed from calculated log ft values, measured γ-ray branching ratios, and in-beam experiment results of the daughter nucleus ⁹⁵Tc. Combining with the high-spin states observed by in-beam γ-ray spectroscopy of previous decay works, the structure of the excited states of ⁹⁵Tc is discussed in the framework of the projected shell model.     

纳米固体超强酸SO2 -4/Fe2O3的红外光谱研究

由纳米α－Ｆｅ２Ｏ３的前驱体,经一定的ＳＯ＾２－４离子的浸泡制得ＳＯ＾２－４／Ｆｅ２Ｏ３纳米固体超强酸。分别测定了在不同的温度下、不同ＳＯ＾２－４含量和不同焙烧时间三种状态下的红外吸收光谱（ＩＲ）,就其对乙酸乙酯的合成催化作用进行了初步的讨论。结果表明,纳米固体超强酸ＳＯ＾２－４／Ｆｅ２Ｏ３劈裂多重的特征谱图有别于对应的普通粒子固体超强酸,谱带劈裂与宽大现象与酯产率成正比关系。     

Palladium‐Catalyzed Intramolecular Hydroamination of Allenes Coupled to Aerobic Alcohol Oxidation

Taking the air! A Pd^II‐catalyzed intramolecular hydroamination of allenes coupled to alcohol oxidation has been developed. This reaction is performed by using a nitrogen‐based ligand under aerobic conditions, under which the molecular oxygen is used as the terminal oxidant for the reoxidation of Pd⁰ species to complete the catalytic cycle.

     

Shape coexistence in 188Pb

The shape coexistence in 188Pb is investigated in terms of the projected shell model. Analyzing the experimental data with the calculated results, it is shown that the three shapes, sphere, oblate and prolate, coexist with each other in the low-lying excited states. The prolate band exhibits a mixture between two kinds of multi-particle-hole configuration. The mixing is discussed and the mixing coefficients are given, meaning the νi13/2 pair alignment happens gradually in this case. The oblate (πh9/22p-2h) band structure is predicted and the 2+ prolate state is in the range of 804-880 keV.     

Production and identification of new neutron-deficient isotope235Am in region of transuranium

A new transuranium neutron-deficient isotope²³⁵Am was produced by 35 MeV proton to bombard the rare radioactive²³⁸Pu target. The products were transported and collected by the He-jet system. The Am isotopes were separated and purified by radiochemistry method and the y-ray, X-ray and y-X(y) coincidence of the samples was measured. The synthesis of²³⁵Am was definitely identified. Its measured half-life is (15±5) min. Project supported by the National Natural Science Foundation of China and the Chinese Academy of Sciences.     

高效液相色谱法测定河道底泥中的多环芳烃

用高效液相色谱法分离测定河道底泥中的多环芳烃，通过梯度淋洗使多种多环芳烃完全分离，并分别得到14种多环芳烃的检出限和线性范围，被试验的4种多环芳烃的回收率为94.1％～103．1％，相对标准偏差为1.00％。2．87％（n=7）。用该方法对小清河东营段的实际底泥样品中多环芳烃的含量进行了测定。     

Decay of 1.643-hr 95Ru to 95Tc

The decay of ⁹⁵Ru has been investigated by means of -ray spectroscopy. The ⁹⁵Ru nuclei were produced by the reaction ⁹²Mo(,n)⁹⁵Ru at the beam energy of 17 MeV. High-purity Ge detectors have been used singly and in coincidence to study -rays in the decay of ⁹⁵Ru to ⁹⁵Tc. 132 -rays are reported, among them, energies and intensities for 127 transitions have been determined. A decay scheme of ⁹⁵Ru with 31 levels is proposed which accommodates 127 of these transitions. Spins and parities for three new levels are proposed from calculated logft values, measured -ray branching ratios, and in-beam experiment results of the daughter nucleus ⁹⁵Tc.     

高比表面积CuPc/TiO2纳米管复合材料的制备及其可见光光催化活性

以P25为前驱体,在碱性条件下采用水热法制备了TiO2纳米管(NT),然后通过浸渍法将敏化剂酞菁铜(CuPc)附着于TiO2NT表面,制得可见光响应的CuPc/TiO2NT复合光催化材料,并对其进行了表征,考察了它在可见光下降解罗丹明B的光催化活性.结果表明,在NaOH碱性条件下水热法制备的TiO2NT具有较大的比表面...     

Instance transfer boosting for object tracking

In this paper, we propose an Instance Transfer Boosting (ITB) framework for object tracking. The proposed tracking framework tries to transfer prior knowledge from the first frame and frame t-2 regarded as source instance to frame t-1 approximately as target instance. Those instances build the online training classifier used in tracking-by-detection for frame t. The novel method presents the tracking task in the current frame from the knowledge transferred by the first frame and the previous two frames, resulting in a more robust tracker for distinguishing the object from the background. Experimental results on several public video sequences demonstrated promising performance of the proposed tracking framework in both tracking accuracy and stability.