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Petroleum Science 2019年第2期16卷 267-284页

作者： Amirhossein Enayati?Bidgoli elham Saemi Petroleum Geology Department Research Institute of Petroleum Industry (RIPI) Islamic Azad University Shahrood Branch

In this study, a sandstone interval of the lower Cretaceous successions in SW Iran is analyzed regarding the effects of late diagenesis on the alteration of primary reservoir quality and pore system. Petrological and geochemical analyses indicate dominant quartz mineralogy(quartz arenite) deposited in distributary channel and mouth bar environments which is embedded in delta front to prodelta argillaceous sediments. Rather than mineralogy and some remaining primary(intergranular)porosity, several late(burial) diagenetic processes including multi-phase carbonate cementation, chlorite cementation, and chemical compaction, affected the reservoir quality. Most of the diagenetic processes had a decreasing effect on the primary reservoir quality. All recognized diagenetic features are related to burial diagenesis of the surrounding open marine shales(clay mineral transformation) and expelled diagenetic fluids.

关键词： Siliciclastic reservoir Late diagenesis Reservoir quality Rock type Lower Cretaceous SW Iran

Carbendazim resistance and calculation effective concentration of carbendazim for Trichoderma harzianum

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Journal of Harbin Institute of Technology(New Series) 2005年第1期12卷 21-24页

作者： elham Siassi YANGQian Dept. of Biotechnology Harbin Institute of Technology Harbin 150001ChinaDept. of Biotechnology Harbin Institute of Technology Harbin 150001China

There is a method for investigating the transformation of resistance gene of carbendazim into Trichoderma harzianum. In order to introduce the resistance to benzimidazole fungicide into bio-control microorganism Trichoderma harzianum was transformed with the resistance gene. In this study, we investigate resistance level and calculate EC 50 (effective concentration of carbendazim that can survive 50% of Trichoderma harzianum in that concentration) and stability of the resistance for the transformant isolate of Trichoderma harzianum. Results show the transformants can growth on the medium containing more than 1 000 μg/ml carbendazim and the resistance is stabled after 10 times transfer on non-selective medium and have EC 50 average about, 1 200 μg/ml.

关键词： fungicide resistance carbendazim trichoderma harzianum EC 50

Simultaneous use of cable and collar to prevent local scouring around bridge pier

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International Journal of Sediment Research 2012年第3期27卷 394-401页

作者： elham IZADINIA Manouchehr HEIDARPOUR Department of Water Engineering Agricultural CollegeIsfahan University of Technology

Various methods to control scour around bridge piers have been *** the present study the application of cable or collar and a combination of cable and collar were examined experimentally,as countermeasures against local scouring at a smooth circular bridge pier,close to threshold flow conditions of initiation of uniform sediment *** results show that the simultaneous use of cable and collar has high efficiency in reducing the scour *** best configuration was found for a cable-pier diameter ratio of 0.15 and thread angle of 15°,in which the scour depth in upstream of the pier reduced to about 53%.In the case of a pier protected with cable and collar the scouring postponed more than pier protected with collar and the rate of scouring is less than in pier protected with *** advantages can reduce the risk of pier failure when the duration of flood is short. The results indicate that the scour reduction increases as the cable diameter increased and the thread angle decreased.

关键词： Scour Bridge Pier Collar Cable

One-pot, solvent-free and efficient synthesis of 2,4,6-triarylpyridines catalyzed by nano-titania-supported sulfonic acid as a novel heterogeneous nanocatalyst

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Chinese Chemical Letters 2015年第10期26卷 1278-1282页

作者： elham Tabrizian Ali Amoozadeh Salman Rahmani elham Imanifar Saeede Azhari Masoumeh Malmir Department of Organic Chemistry Faculty of Chemistry Semnan University

Nano titania-supported sulfonic acid（n-TSA） has found to be a highly efficient, eco-friendly and recyclable heterogeneous nanocatalyst for the solvent-free synthesis of 2,4,6-triarylpyridines through one-pot three-component reaction of acetophenones, aryl aldehydes and ammonium acetate. This reported method illustrates several advantages such as environmental friendliness reaction conditions,simplicity, short reaction time, easy work up, reusability of catalyst and high yields of the products. One new compound is reported too. Furthermore, the catalyst could be recycled after a simple work-up, and reused at least six times without substantial reduction in its catalytic activity.

关键词： Nano-titania-supported sulfonic acid Multicomponent reaction 2 4 6-Triarylpyridines Solvent free Heterogeneous nanocatalyst

CDEC:a constrained deep embedded clustering

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International Journal of Intelligent Computing and Cybernetics 2021年第4期14卷 686-701页

作者： elham Amirizadeh Reza Boostani Department of Computer Sciences and Engineering Shiraz UniversityShirazIran

Purpose-The aim of this study is to propose a deep neural network(DNN)method that uses side information to improve clustering results for big datasets;also,the authors show that applying this information improves the performance of clustering and also increase the speed of the network training ***/methodology/approach-In data mining,semisupervised learning is an interesting approach because good performance can be achieved with a small subset of labeled data;one reason is that the data labeling is expensive,and semisupervised learning does not need all *** type of semisupervised learning is constrained clustering;this type of learning does not use class labels for ***,it uses information of some pairs of instances(side information),and these instances maybe are in the same cluster(must-link[ML])or in different clusters(cannot-link[CL]).Constrained clustering was studied extensively;however,little works have focused on constrained clustering for big *** this paper,the authors have presented a constrained clustering for big datasets,and the method uses a *** authors inject the constraints(ML and CL)to this DNN to promote the clustering performance and call it constrained deep embedded clustering(CDEC).In this manner,an autoencoder was implemented to elicit informative low dimensional features in the latent space and then retrain the encoder network using a proposed Kullback-Leibler divergence objective function,which captures the constraints in order to cluster the projected *** proposed CDEC has been compared with the adversarial autoencoder,constrained 1-spectral clustering and autoencoder t k-means was applied to the known MNIST,Reuters-10k and USPS datasets,and their performance were assessed in terms of clustering *** results confirmed the statistical superiority of CDEC in terms of clustering accuracy to the ***-First of all,this is the first DNN-constrained clustering that

关键词： Deep neural networks Clustering Constrained clustering Big data Denoising autoencoder Kullback-Leibler divergence Constrained deep embedded clustering(CDEC)

Hydrodynamic behavior of an airlift reactor with net draft tube with different configurations: Numerical evaluation using CFD technique

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Particuology 2020年第4期18卷 91-108页

作者： Reza Salehpour elham Jalilnejad Mehran Nalband Kamran Ghasemzadeh Faculty of Chemical Engineering Urmia University of TechnologyUrmiaIran

In terms of gas holdup,liquid velocity,and volumetric mass transfer coefficient for oxygen(KLa),the hydrodynamic behavior of four configurations of an airlift reactor(ALR)with a net draft tube(NDT)of different net mesh sizes(ALR-NDT-3,6,12,and ALR)have been numerically simulated for a range of inlet air flow *** effect of various levels of ratio of height(H)to inner tube diameter(D)of the net draft tube(H/D:9.3,10.7,17.5,and 20)and ratio of inner cross-sectional area of the riser(Ar)to the inner cross sectional area of the downcomer(Ad)(Ad/Ar:1.3 and 7)for different air flow rates is also evaluated for each reactor configuration operating with an air-water *** two-fluid formulation coupled with the k-εturbulence model is used for computational fluid dynamics(CFD)analysis of flow with Eulerian descriptions for the gas and liquid *** between air bubbles and liquid are taken into account using momentum exchange and drag coefficient based on two different *** in the predicted dynamical behavior are similar to those found experimentally.A good agreement was achieved suggesting that geometric effects are properly accounted for by the CFD *** a comparison with experimental data,numerical simulations show significant enhanced gas holdup,liquid velocity,and Kta for the ALR-NDTs compared with the conventional *** gas holdup values are achieved for ALR-NDT-3 than that for the other ALRs because it acts like a bubble column reactor as the holes present in the NDT are *** liquid velocities are seen in ALR-NDT-12,which operates like a conventional ***,the interaction between the NDT and upward gas flow leads to cross flow through the net,small bubbles,and high interfacial area as well as good mass *** was significant in ALR-NDT-6 with maximum Kta value of 0.031 *** applied methodology provides an insightful understanding of the complex dynamic behavior of ALR-NDTs and may be helpful in op

关键词： Airlift reactor Net draft tube Hydrodynamic behavior Computational fluid dynamics(CFD) Gas holdup Mass transfer coefficient

Design and manufacture of emulsion liquid membrane based on various amine extractants for separation and extraction of succinic acid from fermentation broth

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Chinese Journal of Chemical Engineering 2023年第9期61卷 173-179页

作者： elham Ameri Ali Aghababai Beni Zahra Pournuroz Nodeh Department of Chemical Engineering Najafabad BranchIslamic Azad UniversityNajafabadIran Department of Chemical Engineering Shahrekord BranchIslamic Azad UniversityShahrekordIran Department of Chemistry Lahijan BranchIslamic Azad UniversityLahijanIran

The aim of this study was to design a new emulsion liquid membrane(ELM)system for the separation of succinic acid from aqueous *** concentration of succinic acid varied from 20 to 60 mmol·L^(-1).The prepared ELM system includes tributylamine(TBA)as a carrier,commercial kerosene as a solvent,Span 80 as a surfactant,and Na2CO3as a stripping *** order to control the membrane swelling,different values of cyclohexanone were added to the membrane *** effect of various empirical variables on the extraction of the succinic acid such as acid concentration in the feed solution,initial feed concentration,carrier concentration,the stirring speed of the extraction,Na2CO3,surfactant,and cyclohexanone concentrations,and treat ratio in the ELM *** best result was obtained when TBA was used as the *** final acid extraction efficiency was independent of pH variations of the aqueous feed *** extraction of succinic acid solution with a concentration of 40 mmol·L^(-1)was improved by increasing the treat ratio 1:7-1:3,stripping phase concentration 0.5-1.5 mol·L^(-1),stirring speed 300-500 r·min^(-1)and cyclohexanone concentration in the membrane phase 1.2-1.6 mol·L^(-1).No considerable effect on the extraction rate was observed for the carrier concentration in the membrane ***,the surfactant concentration in the feed phase showed a dual effect on the extraction efficiency.

关键词： Design Membranes Separation Emulsion liquid Succinic acid Fermentation broth

A novel and efficient multiparty quantum secret sharing scheme using entangled states

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Science China(Physics,Mechanics & Astronomy) 2012年第10期55卷 1828-1831页

作者： MASSOUD Hadian Dehkordi elham Fattahi School of Mathematics Iran University of Science and TechnologyTehran ***Iran

We proposed a novel and efficient multiparty quantum secret sharing scheme using entangled state which in that the number of parties can be arbitrary *** state which we used,has special properties that make our scheme simple and *** operations which are needed to recover secret message,are only exclusive-or addition and complement *** it is shown that this scheme is secure against *** this scheme provides the best quantum bit efficiency compared with some famous quantum secret sharing schemes.

关键词： quantum secret sharing entangled state multiparty quantum cryptography

Comparative study of mechanical-electrical-thermal responses of pouch, cylindrical, and prismatic lithium-ion cells under mechanical abuse

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Science China(Technological Sciences) 2018年第10期61卷 1472-1482页

作者： LI Wei XIA Yong CHEN GuanHua SAHRAEI elham State Key Laboratory of Automotive Safety and Energy Department of Automotive Engineering Tsinghua University Impact and Crashworthiness Lab Massachusetts Institute of Technology Electric Vehicle Safety Lab The George Mason University

In the study, mechanical abuse tests mainly in the form of indentation were performed on the cylindrical cell, pouch cell, and prismatic cell. The mechanical force-displacement response, open circuit voltage(OCV), and temperature distribution were recorded and compared. In spherical head indentation tests of the pouch and prismatic cell and lateral indentation of the cylindrical cell, the peak force is strongly correlated with OCV drop and local temperature increase. However, in flat-end cylinder indentation tests, the internal mechanical damage is progressively developed, and the OCV drop and the temperature increase occur before the peak force. The fracture surfaces of the post-mortem samples were examined to investigate the correlation between fracture patterns and internal short circuit(ISC) behaviors(OCVand temperature distribution). Two distinct fracture patterns were observed that the in-plane fracture induced by biaxial stretching and inter-layers' fracture induced by shearing. A strong correlation is observed between the number of shear fractures and OCV drop. An increase in the number of inter-layers' fractures increases the rate of OCV drop. Additionally, the fracture patterns influence the ISC area and location,thereby affecting the heat generation and conduction as well as the temperature distribution.

关键词： mechanical abuse fracture pattern mechanical-electrical-thermal response lithium-ion battery

Homological Dimensions with Respect to a Semidualizing Module and Tensor Products of Algebras

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Algebra Colloquium 2015年第2期22卷 215-222页

作者： Maryam Salimi elham Tavasoli Siamak Yassemi Department of Mathematics East Tehran Branch Islamic Azad University Tehran Iran Department of Mathematics University of Tehran Tehran IranSchool of Mathematics Institute for Research in Fundamental Sciences (IPM) Tehran Iran

Let C be a semidualizing module for a commutative ring R. It is shown that the ：IC-injective dimension has the ability to detect the regularity of R as well as the Pc-projective dimension. It is proved that if D is dualizing for a Noetherian ring R such that idR（D） = n 〈 ∞, then ：ID-idR（F） ≤ n for every flat R-module F. This extends the result due to Enochs and Jenda. Finally, over a Noetherian ring R, it is shown that if M is a pure submodule of an R-module N, then/TC-idR（M） ≤ IC-idR（N）. This generalizes the result of Enochs and Holm.

关键词： semidualizing C-projectives C-injectives pure submodules