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Removal of elemental mercury by KI-impregnated clay

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Frontiers of Environmental Science & Engineering 2016年第2期10卷 236-243页

作者： Boxiong SHEN jianhong chen Ji CAI School of Energy & Environmental Engineering Hebei University of Technology Tianiin 300401 China College of Environmental Science & Engineering Nankai University Tianjin 30()071 China

This study described the use of clay impreg- nated by KI in gas phase elemental mercury （Hg°） removal in flue gas. The effects of KI loading, temperature, 02, SO2 and H20 on Hg°removal were investigated using a fixed bed reactor. The Hg° removal efficiency of KI-clay with 3% KI loading could maintain at a high level （approxi- mately 80 %） after 3 h. The KI-clay demonstrated to be a potential adsorbent for Hg° removal when compared with activated carbon based adsorbent. 02 was found to be an important factor in improving the Hg° removal. 02 was demonstrated to assist the transfer of KI to I2 on the surface of KI-clay, which could react with Hg° directly. NO and SO2 could slightly improve Hg° removal, while H20 inhibited it greatly. The results indicated that after adsorption, most of the mercury escaped from the surface again. Some of the mercury may have been oxidized as it left the surface. The results demonstrated that the chemical reaction primarily occurred between KI and mercury on the surface of the KI-clay.

关键词： clay elemental mercury removal efficiency,potassium iodide mechanism

Effect of K and Ca on catalytic activity of Mn-CeOx/Ti-PILC

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Frontiers of Environmental Science & Engineering 2013年第4期7卷 512-517页

作者： Boxiong SHEN Lidan DENG jianhong chen College of Environmental Science and Engineering Nankai University Tianjin 300071 China

Mn-CeOff-l＇i-pillared clay （PILC） is an attrac- tive catalyst for selective catalytic reduction of NOx at low temperature because of its low cost. The poisoning of K and Ca on the catalyst of Mn-CeOx/Ti-PILC is an important problem because K and Ca are always in presence in flue gas. To investigate the effect of K and Ca on the physicochemical characters of the catalysts, the techniques of NH3-temperature programmed desorption （TPD）, H2-temperature programmed reduction （TPR）, and X-ray photoelectron spectroscopy （XPS） were used to analyze the fresh and deactivated catalysts of Mn-CeOJTi- PILC. （Ca）Mn-CeOx/Ti-PILC and （K）Mn-CeOx/Ti-PILC are denoted for the dopes of the catalyst of Mn-CeOJTi- PILC with Ca and K, respectively. The activities of Mn- CeOx/Ti-PILC, （Ca）Mn-CeOx/Ti-PILC and （K）Mn-CeOx/ Ti-PILC for NH3-selective catalytic reduction （SCR） reaction at low temperature were investigated. The results showed that with the dopes of K and Ca on the catalysts, the SCR activities of the catalysts decreased greatly, and K exhibited more poisoning effect than Ca. With the dopes of K and Ca, the acidity, the redox property and chemisorbed oxygen on the surfaces of the catalysts were decreased, which resulted in a decreasing in SCR activity.

关键词： Mn-CeOx/Ti-pillared clay (PILC) low-tem-perature selective catalytic reduction (SCR) K and Capoisoning effect

Identity-based threshold key-insulated signature

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High Technology Letters 2012年第3期18卷 275-280页

作者： chen jianhong chen Kefei Long Yu Department of Computer Science and Engineering Shanghai Jiao Tong University Shanghai 200240 P. R. China Department of Computer Engineering Huaiyin Institute of Technology Huaian 223003 P. R. China National Laboratory of Modern Communications Chengdu 610041 P. R. China

Due to the compromise of the security of the underlying system or machine stonng the key, exposure of the private key can be a devastating attack on a cryptosystem. Key insulation is an important technique to protect private keys. To deal with the private （signing） key exposure problem in identity-based signature systems, we propose an identity-based threshold key-insulated signature （IBTKIS） scheme. It strengthens the security and flexibility of existing identity-based key-insulated signature schemes. Our scheme＇ s security is proven in the random oracle model and rests on the hardness of the computational Diffie-Helhnan problem in groups equipped with a pairing. To the best of our knowledge, it is the first IBTKIS scheme up to now.

关键词： threshold key-insulated signature random oracle model

Predict Blood Pressure by Photoplethysmogram with the Fluid-Structure Interaction Modeling

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Communications in Computational Physics 2022年第4期31卷 1114-1133页

作者： jianhong chen Wenrui Hao Pengtao Sun Lian Zhang Wilshire Advisors LLC Los AngelesCaliforniaUSA Department of Mathematics Pennsylvania State UniversityUniversity ParkPennsylvaniaUSA Department of Mathematical Sciences University of Nevada Las VegasLas VegasNevadaUSA In-Chao Institute Ltd ShenzhenChina

Blood pressure(BP)has been identified as one of the main factors in cardiovascular disease and other related *** how to accurately and conveniently measure BP is important to monitor BP and to prevent *** paper proposes an efficient BP measurement model by integrating a fluid-structure interaction model with the photoplethysmogram(PPG)signal and developing a data-driven computational approach to fit two optimization parameters in the proposedmodel for each *** developed BPmodel has been validated on a public BP dataset and has shown that the average prediction errors among the root mean square error(RMSE),the mean absolute error(MAE),the systolic blood pressure(SBP)error,and the diastolic blood pressure(DBP)error are all below 5mmHg for normal BP,stage I,and stage II hypertension groups,and,prediction accuracies of the SBP and the DBP are around 96%among those three groups.

关键词： Blood pressure prediction fluid-structure interaction PPG

Study on the evaluation system for the cleaner production of the mine

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Ecological Economy 2007年第1期3卷 29-39页

作者： chen jianhong Wang Bin School of Resources and Safety Engineering.Central South University Changsha 410083.P.R China

It is important to establish the evaluation system of the cleaner production of the mining enterprise, which canprovide the technical support and guidance for the cleaner production evaluation and facilitating the promotion ofcleaner productive techniques so as to realize the integration of economic development and environmental *** paper, according to the characteristic of mining and Analytic Hierarchy Process (AHP), establishes the evaluationindex system, puts forward the overall quantitative evaluation method based on Fuzzy Mathematics and the experts’experience, and establishes the evaluation system of cleaner production. The main problems in cleaner production of themine are analyzed by calculation, and some countermeasures and suggestions are proposed.

关键词： Mine Cleaner production Evaluation system Index system Fuzzy evaluation

Agent-Based Simulation of Rumor Propagation on Social Network Based on Active Immune Mechanism

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Journal of Systems Science and Information 2017年第6期8卷 571-584页

作者： jianhong chen Qinghua SONG Zhiyong ZHOU School of Resources and Safety Engineering Central South UniversityChangsha 410083China

To simulate the rumor propagation process on online social network during emergency, a new rumor propagation model was built based on active immune mechanism. The rumor propagation mechanisms were analyzed and corresponding parameters were defined. BA scale free network and NW small world network that can be used for representing the online social network structure were constructed and their characteristics were compared. Agent-based simulations were conducted on both networks and results show that BA scale free network is more conductive to spreading rumors and it can facilitate the rumor refutation process at the same time. Rumors paid attention to by more people is likely to spread quicker and broader but for which the rumor refutation process will be more effective. The model provides a useful tool for understanding and predicting the rumor propagation process on online social network during emergency, providing useful instructions for rumor propagation intervention.

关键词： rumor emergency online social network agent-based simulation active immune

A Study on Evidentiality in the Abstract Part of Learners’English Academic Papers

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Sino-US English Teaching 2023年第6期20卷 227-231页

作者： chen jianhong University of Shanghai for Science and Technology ShanghaiChina

Evidentiality indicates the source of information and the speaker’s attitude towards the reliability of *** paper analyzed evidentiality in 30 abstracts of English academic papers written by second-year science and engineering students and revealed that reporting evidentials and inferring evidentials have been used in the abstracts,while sensory evidentials and belief evidentials have not been *** enlightenment from the analysis is that teachers can introduce to students the functions of different types of evidentials and the varied ways of expressions and help students raise the awareness of using evidentials consciously and properly to enhance their academic abstract writing.

关键词： evidentiality reporting evidentials inferring evidentials sensory evidentials belief evidentials

Characterization of Synonymous Codon Usage Bias in the Pseudorabies Virus US1 Gene

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Virologica Sinica 2012年第5期27卷 303-315页

作者： Meili Li Zhiyao Zhao jianhong chen Bingyun Wang Zi Li Jian Li Mingsheng Cai Department of Pathogenic Biology and Immunology Guangzhou Medical UniversityGuangzhou 510182China Department of Veterinary Medicine Foshan Science and Technology UniversityFoshan 528231China

In the present study, we examined the codon usage bias between pseudorabies virus （PRV） US1 gene and the USl-like genes of 20 reference alphaherpesviruses. Comparative analysis showed noticeable disparities of the synonymous codon usage bias in the 21 alphaherpesviruses, indicated by codon adaptation index, effective number of codons （ENc） and GC3s value. The codon usage pattern of PRV US1 gene was phylogenetically conserved and similar to that of the USl-like genes of the genus Varicellovirus of alphaherpesvirus, with a strong bias towards the codons with C and G at the third codon position. Cluster analysis of codon usage pattern of PRV US1 gene with its reference alphaherpesviruses demonstrated that the codon usage bias of USl-like genes of 21 alphaherpesviruses had a very close relation with their gene functions. ENc-plot revealed that the genetic heterogeneity in PRV US1 gene and the 20 reference alphaherpesviruses was constrained by G＋C content, as well as the gene length. In addition, comparison of codon preferences in the US1 gene of PRV with those ofE. coli, yeast and human revealed that there were 50 codons showing distinct usage differences between PRV and yeast, 49 between PRV and human, but 48 between PRV and E. coil Although there were slightly fewer differences in codon usages between *** and PRV, the difference is unlikely to be statistically significant, and experimental studies are necessary to establish the most suitable expression system for PRV US1. In conclusion, these results may improve our understanding of the evolution, pathogenesis and functional studies of PRV, as well as contributing to the area of herpesvirus research or even studies with other viruses.

关键词： Pseudorabies virus US1 gene Alphaherpesvirus Codon usage bias

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焊缝金属解理断裂微观机理

金属学报 2017年第11期53卷 1427-1444页

作者：陈剑虹曹睿兰州理工大学省部共建有色金属先进加工与再利用国家重点实验室兰州730050 兰州理工大学材料科学与工程学院兰州730050

本文为低合金高强钢的解理断裂提出了一个新的理论框架:解理断裂不仅决定下平台的冲击韧性,而且对过渡温度区的韧性也起决定性的作用,因为在这个温度区间韧性取决于先前产生的塑性裂纹扩展的长度,而解理断裂终止了塑性裂纹的扩展,从而... 详细信息

本文为低合金高强钢的解理断裂提出了一个新的理论框架:解理断裂不仅决定下平台的冲击韧性,而且对过渡温度区的韧性也起决定性的作用,因为在这个温度区间韧性取决于先前产生的塑性裂纹扩展的长度,而解理断裂终止了塑性裂纹的扩展,从而决定其长度。解理断裂包含3个不间断的阶段:(1)裂纹在第二相颗粒起裂成核;(2)第二相裂纹穿过第二相颗粒和晶粒边界扩展;(3)晶粒裂纹穿过晶粒边界扩展进入相邻晶粒。本理论框架对整个过程进行了诠释:解理断裂的临界事件是在裂纹形成过程中提供最大困难的阶段,它控制了解理断裂过程,并确认了最薄弱的微观组分及其临界尺寸,这个尺寸决定了微观解理断裂应力sf。在断裂过程研究中最为重要的就是揭示各种条件下断裂的临界事件。提出引发解理断裂的3个准则:(1)裂纹起裂成核准则;(2)防止裂纹核钝化准则;(3)裂纹扩展准则。并由这3个准则形成了一个活性区,在活性区中应力和应变的综合作用可以引发解理断裂,这个活性区被用来建立断裂的统计模型。本研究利用这个新的理论框架进行了8%Ni钢焊缝的实例研究,以说明实验研究的结果。

关键词：解理断裂断裂过程临界事件断裂准则