代数法推求等价组态j-j耦合原子光谱项

等价组态 j- j耦合原子光谱项的推求方法比较复杂 ,本文提出了推求等价组态 j- j耦合原子光谱项的新方法——代数法。该法计算过程简单 ,易于掌握     

可调谐二极管激光吸收光谱法监测大气痕量气体中的浓度标定方法研究

可调谐二极管激光吸收光谱(TDLAS)技术是利用二极管激光器波长调谐特性,获得被测气体的特征吸收光谱范围内的吸收光谱,从而对污染气体进行定性或者定量分析。在空气痕量气体检测中,一般需要和长光程吸收池相结合使用。可调谐二极管激光吸收光谱法就是在可调谐二极管激光器与长光程吸收池技术相结合的基础上发展起来的一种新的痕量气体检测方法。这种方法不仅精度较高,选择性强而且响应速度快。已经广泛用于大气中多种痕量气体的检测以及地面的痕量气体和气体泄漏的检测。在大部分痕量气体检测仪器中需要精确地对检测气体进行在线的浓度标定,文章介绍了一个简单而精确的浓度标定方法,从理论上进行了分析,然后通过实验证明了这种方法的可行性。     

分解-递推法推求等价组态j-j耦合原子光谱项

本文提出了推求等价组态ｊ－ｊ耦合原子光谱项的新方法—分解－递推法。该法计算过程简单,易于掌握     

分解-组合法推求等价组态j-j耦合谱项的J值

本文提出一种用以推求等价组态ｊ－ｊ耦合原子光谱项的Ｊ值的方法——分解－组合法。使用Ｃ语言编写了计算组合组态（ｊ）ｎｊ的ＭＪ值的程序,人工方法得到Ｊ值。结果与文献相符。     

HT-7U装置环电压建立过程

由于真空室的屏蔽作用,当极向磁场变化时等离子区域的磁场不能随极向磁场同时变化,环电压的建立存在一增过程。研究结果表明,环电压延迟的时间常数与真空室的等诳时间常数一致。在真空室等效时间常数确定的情况下,可以确定环电压上升过程。ＨＴ－７Ｕ装置环电压建立过程大约需要２０ｍｓ。     

级联型爆磁压缩发生器的等效电路计算

 动态级联型爆磁压缩发生器由多级构成,后一级俘获前一级的磁通进而将能量放大。用镜像电流法计算装置等效电感和电阻,用磁通俘获模型计算两级间磁通耦合,并假设损耗电阻正比于直流电阻。用该等效电路方法计算了一种两级动态级联型爆磁压缩发生器的静态和动态电路参数,并对其输出电流波形进行了模拟,同实际测量和实验结果进行了比较,同时对该装置通过脉冲变压器对脉冲形成线的充电过程进行了简单的模拟计算。结果表明,该计算方法对级联型爆磁压缩发生器的优化设计和应用研究具有较好的指导作用。另外两级磁通俘获模型对于间接馈电（线圈或永磁体）装置模拟计算也有一定的参考价值。     

Assessment of Traffic Noise Pollution in Burla Town,India; An Inclusive Annoyance Study

Noise pollution is one of the major public health problems in urban areas throughout the world. Noise is unwanted sound which produces undesirable problems in day to day life of human being (e.g., physiological and psychological problems). Rapid increase of the industrialization, urbanization, infrastructure, volume of motor vehicles, and increase in the road networks brought noise pollution to the highest level of disaster in a current situation. In urban areas, road traffic noise plays commanding role among all noise sources and affects the exposed inhabitants. The present work is done to evaluate and assess the traffic noise and its effects in Burla town. Burla, Vidyanagari of Odisha, is an emerging town in India, as it hosts national level of teaching and research institutions like IIM Sambalpur, a medical college- cum-hospital (VIMSAR), a technical university (VSSUT) and Sambalpur University. In last two decade, the road traffic volume has been increased and is facing severe noise pollution to its inhabitants. Noise pollution assessment was made at different locations of the town. This study unveiled the dismal state of noise pollution in the town. Noise contour maps were drawn to visualize the noise level at the traffic and its surroundings. The numbers of hearing impaired patients in different hospitals of the locality are increasing. That shows grim picture of the situation. Regression equations were established taking noise levels with percentage of highly annoyed people during study indicates strong correlation.     

Sulfur Poisoning and Self-Recovery of Single-Site Rh1/Porous Organic Polymer Catalysts for Olefin Hydroformylation

Sulfur poisoning and regeneration are global challenges for metal catalysts even at the ppm level. The sulfur poisoning of single-metal-site catalysts and their regeneration is worthy of further study. Herein, sulfur poisoning and self-recovery are first presented on an industrialized single-Rh-site catalyst (Rh₁/POPs). A decreased turnover frequency of Rh₁/POPs from 4317 h⁻¹ to 318 h⁻¹ was observed in a 1000 ppm H₂S co-feed for ethylene hydroformylation, but it self-recovered to 4527 h⁻¹ after withdrawal of H₂S, whereas the rhodium nanoparticles demonstrated poor activity and self-recovery ability. H₂S reduced the charge density of the single Rh atom and lowered its Gibbs free energy with the formation of inactive (SH)Rh(CO)(PPh₃-frame)₂, which could be regenerated to active HRh(CO)(PPh₃-frame)₂ after withdrawing H₂S. The mechanism and the sulfur-related structure–activity relationship were highlighted. This work provides an understanding of heterogeneous ethylene hydroformylation and sulfur-poisoned regeneration in the science of single-atom catalysts.     

Rational Design of Covalent Organic Frameworks as Gas Diffusion Layers for Multi-atmosphere Lithium-Air Batteries

Non-aqueous Li-air batteries, despite their high energy density and low cost, have not been deployed practically due to their instability in ambient air, where moisture causes parasitic reactions and shortens their life drastically. Here, we demonstrate the rational design of nanoporous covalent organic frameworks (COFs) as effective gas diffusion layers (GDLs) to address this constraint. The COF GDLs, with a tailor-made pore size of ≈1.4 nm and superhydrophobicity, can limit the intrusion of organic electrolytes and moisture into the gas diffusion channels, enabling high capacity, fast kinetics, and excellent stability of the Li-air batteries. Moreover, we achieve multi-atmosphere Li-air batteries, which can stably cycle under open ambient air (relative humidity up to 95 %) and even in various atmospheres with looping oxygen, humid air, and carbon dioxide. The design principles of our COF GDLs can be universally applied in energy storage and electrochemical systems using organic electrolytes.