岭回归原子吸收光谱法同时测定钴和铟

用岭回归法校正了火焰原子吸收光谱分析中In 252.137nm对Co 252.136nm的吸收线重叠干扰,对合成样品中Co和In的含量进行了同时测定,结果令人满意.可以认为岭回归可能是解决原子吸收谱线重叠干扰的一种方法.     

岭回归原子吸收光谱法同时测定锰和镓

本文用岭回归法校正了火焰原子吸收分析中Ga403.30nm对Mn403.31nm的吸收线重叠干扰,对合成样中Mn和Ga测定结果令人满意。岭回归是解决原子吸收谱线重叠干扰的一种可能方法。     

岭回归原子吸收光谱法同时测定铅和铯

本文用岭回归法校正了在火焰原子吸收光谱分析中铯２４７．６４３ｎｍ对铅２４７．６３８ｎｍ的吸收线重叠干扰,并用本法对混合样中铅和铯进行了测定,结果令人满意,可以认为岭回归可能是解决原子吸收谱线重叠干扰的一种方法。     

岭回归原子吸收光谱法同时测定Fe和Pt

火焰原子吸收光谱法在271．903nm波长处测定Fe时，Pt对其吸收线产生谱线叠加干扰，用岭回归法校正了Pt271．904nm光谱法对Fe271．903nm的干扰，以Fe元素空心阴极灯同时测定Fe、Pt两种元素。     

邻近非共振线校正背景-火焰原子吸收光谱法测定高盐食品中的铅

介绍了高盐食品中铅的火焰原子吸收光谱测定方法;用铅283.3nm共振线测定样品溶液中铅的原子吸收信号与背景吸收信号之和,另选一条铅280nm非共振线测定样品溶液的背景吸收信号,然后减掉背景吸收信号.方法相对标准偏差为0.8％-4.1％,回收率为91％-102.5.％.该方法简便、快速、准确,用于高盐食品中铅的测定,结果令人满意.     

原子吸收法测定加氢脱炔催化剂中的钯和铅

着重研究了空气－乙炔火焰原子吸收法测定钯和铅的介质影响条件，以及消除对钯干扰的释放剂和保护剂，拟定了采用酸浸溶不经分离直接测定的方法     

偏最小二乘法在火焰原子吸收分析中的应用

本文用偏最小二乘法校正了火焰原子吸收分析中Ｐｄ２４７．４３ｎｍ对Ｐｂ２４７．６３８ｎｍ的吸收线重叠干扰，对合成样中Ｐｂ和Ｐｄ的测定，结果令人满意，ＰＬＳ法是谱线重叠干扰的有效校正方法。     

原子吸收光谱法测定铬元素的最灵敏线

对国内原子吸收文献中记载的原子吸收光谱法测定铬元素的最灵敏线提出了不同观点.文献记载,原子吸收光谱法测定铬元素的最灵敏线为357.9nm,次灵敏线为359.3nm.经过对铬元素进行原子吸收光谱扫描证实,最大吸收峰位置在359.3nm处;次吸收峰位置在357.9nm处.同时,分别在357.9nm和359.3nm处进行校准曲线的测定,359.3nm处所测的有效吸收值和灵敏度均高于357.9nm处的吸收值和灵敏度.结果表明,原子吸收光谱法测定铬元素的最灵敏线应为359.3nm.     

解联立方程组法校正火焰原子吸收光谱干扰

本文用解联立方程组法校正了火焰原子吸收分析中镓４０３．３０ｎｍ谱线对锰４０３．３１ｎｍ谱线的重叠干扰。实验结果表明：解联立方程组法是解决原子吸收光谱干扰的可能方法，该法在应用于合成的锰和镓测定中结果令人感到满意。     

偏最小二乘火焰原子吸收光谱法同时测定汞和钴

本文研究了偏最小二乘原子吸收光谱法同时测定Hg和Co的方法,校正中Co253.649nm对Hg 253.652nm的吸收红重叠干扰,用Hg空心阴极灯同时一合成样中的Hg和Co,方法快速、简单、准确,结果令人满意。     

白光和红绿蓝光LED可调光源研制

为了提高LED光源色温和亮度的调节精度和准确度,结合色温由低向高变化时光色所呈现的渐变特点,提出了一种低色温白光LED灯珠、高色温白光LED灯珠加红绿蓝光LED灯珠补偿式调光的方法.将色温分成三个部分进行调节,每个部分选用不同的LED灯珠组合来进行调光.实验结果表明:不同组合情况下的LED光源的初始输出色温相对于目标值的偏差范围在1％以内;亮度可以在保证色温不变的情况下独立进行调节,初始输出值与目标值的偏差范围在1％以内;经过微调之后可以达到目标值;达到了色温和亮度独立调节的要求;光源发光稳定,不会因为长时间工作而影响调节精度.     

Muonic and pionic L- and M-series in carbon and oxygen and the pionic 2p level shift and width of oxygen

Muonic and pionic X-rays of the L- and M-series in C and O have been measured with a Si(Li) detector in the energy range between 7 keV and 60 keV. The target consisted of mylar (C₅H₄O₂). Energies and intensities of 21 transitions have been determined. The strong interaction shift of the pionic 2p level in O was measured and found to be +4.1 ±2.3 eV. The measured width of this level is 11±6 eV. The measured yields have been compared with cascade calculations.     

Visualization and interferometry for cylindrical and spherical sample tomography and profilometry

A technique combining image processing and laser interferometry for visualizing and detecting the deformation of transparent cylindrical and spherical sample is proposed. This deformation includes geometric deformation such as volume transition in profilometry and physical deformation such as refractive index change in tomography. Phase contour lines are used for quantitative analysis and graphical representation of the deformation. This method allows us to visually detect the spatial variation of the deformation field and to evaluate the test quality such as misalignment of optical system. A theoretical analysis using phase contour map to characterize the deformation field is described in detail. A method using phase contour map to qualify the interferometric test is proposed. Analysis of test examples is carried out. Suggestions on using phase contour line method to ameliorate test system design are finally discussed.     

Nonlocal potentials and their exact and approximate local and velocity-dependent equivalents

We show that good approximations to the exact equivalent local potential (ELP) and damping factor of a nonlocal Perey-Buck potential can be calculated in the partial wave WKB approximation of Horiuchi. The exact ELP and damping factor are obtained by means of a method previously given by one of us. We also confirm that an approximate ELP proposed by Bauhoff et al. is of comparable accuracy as the Horiuchi approximation. Thesel-dependent ELP's exhibit reduced attraction in the interior and provide a test for higher order WKB approximations. We subsequently obtain an equivalent velocity dependent potential (EVDP) which is even exactly wave function equivalent to the original nonlocal potential. This almost local potential, unlike the trivial equivalent local potential, is smooth and well-behaved and is therefore particularly useful in nuclear reactions where the off-shell behaviour of the potential is important.     

Spin and Statistics and First Principles

It was shown in the early seventies that, in Local Quantum Theory (that is the most general formulation of Quantum Field Theory, if we leave out only the unknown scenario of Quantum Gravity) the notion of Statistics can be grounded solely on the local observable quantities (without assuming neither the commutation relations nor even the existence of unobservable charged field operators); one finds that only the well known (para)statistics of Bose/Fermi type are allowed by the key principle of local commutativity of observables. In this frame it was possible to formulate and prove the Spin and Statistics Theorem purely on the basis of First Principles.     

Quantum and Classical Disparity and Accord

Discrepancies and accords between quantum (QM) and classical mechanics (CM) related to expectation values and periods are generally found for both the harmonic oscillator (SHO) and a free particle in a box (FPB), which may apply generally. These indicate non-locality is expected throughout QM. The FPB energy states violate the Correspondence Principle. Previously unexpected accords are found and proven that 〈x ²〉 _CM =〈x ²〉 _QM and τ _CM =τ _QMb (beat period i.e. beats between the phases for adjoining energy states) for the SHO for all quantum numbers, n. However, for the FPB the beat periods differ at small n. It is shown that a particle’s velocity in an infinite square well varies, no matter how wide the box, nor how far the particle is from the walls. The quantum free particle variances share an indirect commonality with the Aharonov-Bohm and Aharonov-Casher effects in that there is a quantum action in the absence of a force. The concept of an “Expectation Value over a Partial Well Width” is introduced. This paper raises the question as to whether these inconsistencies are undetectable, or can be empirically ascertained. These inherent variances may need to be fixed, or nature is manifestly more non-classical than expected.