Developed, binary, image processing in a dual-channel, optical, real-time morphological processor

A developed, binary, image-processing technique is proposed, and a dual-channel, optical, real-time morphological processor is developed. Nine binary image processings can be realized fully in parallel. The measures for compensating scale and rotation distortion for pattern recognition are provided. Some applications of optical, morphological binary image processing are studied and experimental results are listed.     

ICP-AES法测定超高强度钢中Mn,Si,Al,Ti,Nb,La杂质元素

介绍了采用ICP-AES测定超高强度钢中Mn,Si,Al,Ti,Nb,La的方法.研究了超高强度钢中基体元素,常见元素对六种杂质元素分析谱线的光谱干扰情况;选择了合适的分析谱线;工作曲线线性良好;根据钢中共存元素的含量范围,进行了加入回收实验和精密度、准确度实验,测量结果满足分析要求.     

微波消解-ICP-AES法测定茶叶中钾、钠、磷、硫、铁、锰、铜、锌、钙、镁方法研究

通过优化微波消解条件,并根据不同元素性质,调谐ICP-AES工作条件至最佳,实现了茶叶中K、Na、P、S以及Fe、Mn、Cu、Zn、Ca、Mg 10种元素的同时测定。10种元素测定结果 RSD%为0.67(Cu)～5.57(Na),回收率为84.0%(Na)～101.5%(Fe),检出限为0.001(Mn)～0.029(S)μg·g-1,表明该方法准确可靠,能够满足茶叶中K、Na、P、S、Fe、Mn、Cu、Zn、Ca、Mg分析要求。     

Pairing, Stripes, Lattice Distortions, and Superconductivity in Cuprate Oxides

We propose a model for a spatially modulated collective state of superconducting cuprates in which the electronic properties vary locally in space. In this model, the regions of higher hole density (called stripes) are described as Luttinger liquids and the regions of lower density (antiferromagnetic ladders) as an interacting bosonic gas of hole pairs. We show that the transition to the superconducting state is topologic and driven by decay processes among these elementary excitations in the presence of vibrations.     

ICP-AES同时测定磷灰石中的K、Na、Ca、Mg、Ti等元素

研究了电感耦合等离子体原子发射光谱(ICP-AES)同时测定磷灰石中的K、Na、Ca、Mg、Ti等元素。确定了各元素的检出限,回收率在97%-104%之间,RSD小于1.5%,该方法用于样品测定,结果令人满意。     

Color, iridescence, and thermoregulation in Lepidoptera

This paper examines evidence for the hypothesized connection between solar thermal properties of butterfly and moth (Lepidoptera) wings, iridescence/structural color, and thermoregulation. Specimens of 64 species of Lepidoptera were measured spectrophotometrically, their solar absorptances calculated, and their habitat temperatures determined. No correlation was found between habitat temperature and the solar absorptance of the wings. It was found, however, that the iridescent specimens exhibited, on average, substantially higher solar absorptance than noniridescent ones.     

Replenishment planning in discrete-time, capacitated, non-stationary, stochastic inventory systems

In this paper, we examine a single-product, discrete-time, non-stationary, inventory replenishment problem with both supply and demand uncertainty, capacity limits on replenishment quantities, and service level requirements. A scenario-based stochastic program for the static, finite-horizon problem is presented to determine replenishment orders over the horizon. We propose a heuristic that is based on the first two moments of the random variables and a normal approximation, whose solution is compared with the optimal from a simulation-based optimization method. Computational experiments show that the heuristic performs very well (within 0.25% of optimal, on average) even when the uncertainty is non-normal or when there are periods without any supply. We also present insights obtained from sensitivity analyses on the effects of supply parameters, shortage penalty costs, capacity limits, and demand variance. A rolling-horizon implementation is illustrated.     

食品接触材料高分子材料中钡、钴、铜、铁、锂、锰和锌的迁移量测定

采用电感耦等离子体原子发射光谱仪(ICP-AES),同时测定了食品接触材料高分子材料中钡、钴、铜、铁、锂、锰和锌的迁移量,并对ICP-AES法测定时分析线的选择和入射功率、泵速、载气压力的影响,以及基体和共存离子的干扰情况等进行了研究。研究表明,此方法简便快速,回收率为85.9%～108%,相对标准偏差为2.92%～6.78%。     

Optical properties of the metals Al, Co, Cu, Au, Fe, Pb, Ni, Pd, Pt, Ag, Ti, and W in the infrared and far infrared

Infrared optical constants collected from the literature are tabulated. The data for the noble metals and Al, Pb, and W can be reasonably fit using the Drude model. It is shown that -epsilon1(omega) = epsilon2(omega) approximately omega(2)(p)/(2omega(2)(tau)) at the damping frequency omega = omega(tau). Also -epsilon1(omega(tau)) approximately - (1/2) epsilon1(0), where the plasma frequency is omega(p).     

Polycyclic aromatic hydrocarbons in water,sediment, soil,and plants of the Aojiang River waterway in Wenzhou,China

The town of Shuitou was renowned as the leather capital of China because of its large-scale tanning industry, but the industry's lack of pollution controls has caused severe damage to the local water system. This study determined 15 priority polycyclic aromatic hydrocarbons (PAHs) in water, sediment, soil, and plant samples collected from Aojiang River and its estuary. The total PAHs ranged from 910 to 1520 ng/L in water samples. The total PAH in sediments were moderate to low in comparison with other rivers and estuaries in China, but the relative proportions of PAHs per million people are high when considering the population size associated with each watershed. Ratios of fluoranthene/pyrene and PAHs with low/high molecular weight suggest a petrogenic PAH origin. The PAH composition profile in soil was similar to that in sediment with 4–6 ring PAHs being dominant. The PAHs with 2–3 rings were the dominant species in plant leaves. There were no correlations between PAHs in soils and in plants, suggesting that PAHs accumulate in plant leaves through absorption from the air. The general observation of elevated PAH concentrations in all matrix suggests a possible contribution by the local leather industry on the PAH concentrations in the Aojiang watershed.     

Advancements in Copper Nanowires: Synthesis,Purification, Assemblies,Surface Modification,and Applications

Copper nanowires (CuNWs) are attracting a myriad of attention due to their preponderant electric conductivity, optoelectronic and mechanical properties, high electrocatalytic efficiency, and large abundance. Recently, great endeavors are undertaken to develop controllable and facile approaches to synthesize CuNWs with high dispersibility, oxidation resistance, and zero defects for future large‐scale nano‐enabled materials. Herein, this work provides a comprehensive review of current remarkable advancements in CuNWs. The Review starts with a thorough overview of recently developed synthetic strategies and growth mechanisms to achieve single‐crystalline CuNWs and fivefold twinned CuNWs by the reduction of Cu(I) and Cu(II) ions, respectively. Following is a discussion of CuNW purification and multidimensional assemblies comprising films, aerogels, and arrays. Next, several effective approaches to protect CuNWs from oxidation are highlighted. The emerging applications of CuNWs in diverse fields are then focused on, with particular emphasis on optoelectronics, energy storage/conversion, catalysis, wearable electronics, and thermal management, followed by a brief comment on the current challenges and future research directions. The central theme of the Review is to provide an intimate correlation among the synthesis, structure, properties, and applications of CuNWs.     

Observation of thermal-acoustic oscillations in hydrogen,nitrogen, oxygen,and argon

Experimental data on the dependence of the thermal-acoustic oscillation frequency upon the height of a liquid column in tubes dipped into nitrogen, oxygen, argon, and hydrogen are presented. The conditions under which these oscillations occur have been found and the oscillation amplitudes have been measured. Attempts were made to observe thermal-acoustic oscillations with a gas column of nitrogen and oxygen with the help of sensitive equipment.     

Solid Ar, N2, CO, and O2 in Nanopores

Molecular solids enclosed in pores with diameters in the nm-range are a research field which attracts growing interest. The major questions asked in this context are: what is the structure and the dynamics? How are phase and glass transitions modified by the geometrical constraint? In this contribution we present structural information, by x-ray diffraction measurements, as well as thermodynamic characterization, by vapor pressure and heat capacity measurements, on Ar, which is usually considered the simplest of all condensates, and on the small diatomic molecules N₂, C0, O₂ in porous glasses with average pore diameters from 50 to 130Å.     

Phase relationships in the ternary systems (V,Cr, Mo,W, Mn,Re)-Al-N

Phase equilibria in the ternary systems of aluminum and nitrogen with vanadium, chromium, molybdenum, tungsten, manganese and rhenium are investigated by X-ray diffraction of sintered alloys. No ternary phase is observed. AIN does not show solubility for these metals, and coexists either with the solid solution of these metals with aluminium (in the case of vanadium, chromium and manganese) or with the pure metal (for molybdenum, tungsten and rhenium). Isothermal sections are presented for 1073 K (Mn-Al-N), 1273 K (V-Al-N, Cr-Al-N, Mn-Al-N and Re-Al-N), 1573 K (V-Al-N) and 1773 K (Mo-Al-N, W-Al-N and Re-Al-N).