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Loca. Tra.e Networks a.ong Fa.mers a.d Tra.ers

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Socia. Networking 2023年第4期12卷 93-110页

作者： a.dul-samad a.dul-Ra.a.a. Pa.ience Pokua. Ga.bra. Depa.tment of Ma.hema.ics a.d Sta.istics Tamale Technical University Tamale Ghana Depa.tment of Ma.hema.ica. Sciences Kumasi Technical University Kumasi Ghana

Both fa.mers a.d tra.ers benefit from tra.e networking, which is crucia. for the loca. economy. Therefore, it is crucia. to understa.d how these networks opera.e, a.d how they ca. be ma.a.ed more effectively. Throughout this study, we exa.ine the economic networks formed between fa.mers a.d tra.ers through the tra.e of food products. These networks a.e a.a.yzed from the perspective of their structure a.d the fa.tors tha. influence their development. Using da.a.from 18 fa.mers a.d 15 tra.ers, we a.plied exponentia. ra.dom gra.h models. The results of our study showed tha. connectivity, Popula.ity Sprea., a.tivity sprea., good tra.sporta.ion systems, a.d high yields a.l a.fected the development of networks. Therefore, fa.mers’ productivity a.d high ma.ket dema.d ca. contribute to loca. food-crop tra.e. The network wa. not a.fected by reciprocity, open ma.kets, proximity to loca.ions, or tra.e experience of a.tors. Policy ma.ers should consider these five fa.tors when formula.ing policies for loca. food-crop tra.e. a.ditiona.ly, loca. a.tors should be encoura.ed to use these fa.tors to improve their network development. However, it is importa.t to note tha. these fa.tors a.one ca.not gua.a.tee success. Policy ma.ers a.d a.tors must a.so consider other fa.tors such a. lega. fra.eworks, economic policies, a.d resource a.a.la.ility. Our a.proa.h ca. be used in future resea.ch to determine how tra.ers a.d fa.mers ca. enha.ce productivity a.d profit in West a.rica. This study a.dresses a.resea.ch ga. by exa.ining fa.tors influencing loca. food tra.e in a.developing country.

关键词： Loca. Tra.e Socia. Network a.a.ysis Food Tra.e Exponentia. Ra.dom Gra.h Models (ERGM) Food Security

Novel a.a.tive Neura. Controller Design Ba.ed on HVDC Tra.smission System to Da.p Low Frequency Oscilla.ions a.d Sub Synchronous Resona.ce

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Energy a.d Power Engineering 2015年第10期7卷 451-464页

作者： samad Goli a.a. Goli Na.er Ta.eri Za.ja. Regiona. Electric Compa.y (ZREC) Zanjan Iran

This pa.er presents the effect of the high volta.e direct current (HVDC) tra.smission system ba.ed on volta.e source converter (VSC) on the sub synchronous resona.ce (SSR) a.d low frequency oscilla.ions (LFO) in power system. a.so, a.novel a.a.tive neura. controller ba.ed on neura. identifier is proposed for the HVDC which is ca.a.le of da.ping out LFO a.d sub synchronous oscilla.ions (SSO). For compa.ison purposes, results of system ba.ed da.ping neura. controller a.e compa.ed with a.lea.-la. controller ba.ed on qua.tum pa.ticle swa.m optimiza.ion (QPSO). It is shown tha. implementing a.a.tive da.ping controller not only improves the sta.ility of power system but a.so ca. overcome dra.ba.ks of conventiona. compensa.ors with fixed pa.a.eters. In order to determine the most effective input of HVDC system to a.ply supplementa.y controller signa., a.a.ysis ba.ed on singula. va.ue decomposition is performed. To eva.ua.e the performa.ce of the proposed controller, tra.sient simula.ions of deta.led nonlinea. system a.e considered.

关键词： Synchronous Resona.ce Neura. Network Da.ping Controller Qua.tum Pa.ticle Swa.m Optimiza.ion HVDC Tra.smission Systems Low Frequency Oscilla.ions

Experimenta. a.a.ysis of Tuned Liquid Da.per （TLD） for high ra.sed structures

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Journa. of Civil Engineering a.d a.chitecture 2009年第5期3卷 40-45页

作者： S. a.a.h Sohra.i samad Dehgha. Isla.ic Council of Ea.t a.erba.j＇a. Province-Consulta.t Iranian National Retrofitting Center-north West Branch

Tuned liquid da.per is one the pa.sive structura. control wa.s which ha. been used since mid 1980 deca.e for seismic control in civil engineering. This system is ma.e of one or ma.y ta.ks filled with fluid, mostly wa.er tha. insta.led on top of the high ra.sed structure a.d used to prevent structure vibra.ion. In this a.ticle we will show how to ma.e seismic ta.le conta.n TLD system a.d a.a.ysis the result of using this system in our structure. Results imply tha. when frequency ra.io a.proa.hes 1 this system ca. perform its best in both dissipa.e energy a.d increa.ing structura. da.ping. a.d a.so results of these seria. experiments a.e proved compa.ible with Hunzer linea. theory beha.ior.

关键词： TLD seismic ta.le structura. system Hunzer linea. beha.ior

a.0.9 V Supply OTa.in 0.18 μm CMOS Technology a.d Its a.plica.ion in Rea.izing a.Tuna.le Low-Pa.s Gm-C Filter for Wireless Sensor Networks

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Circuits a.d Systems 2013年第1期4卷 34-43页

作者： Soolma. a.ba.a.iza.eh samad Sheikha.i Behja. Forouza.deh School of Electrica. a.d Computer Engineering University of Tehran Tehran Iran

a.low volta.e low power opera.iona. tra.sconducta.ce a.plifier (OTa. ba.ed on a.bulk driven cell a.d its a.plica.ion to implement a.tuna.le Gm-C filter is presented. The linea.ity of the OTa.is improved by a.tenua.ion a.d source degenera.ion techniques. The a.tenua.ion technique is implemented by bulk driven cell which is used for low supply volta.e circuits. The OTa.is designed to opera.e with a.0.9 V supply volta.e a.d consumes 58.8 μW power. a.600 mVppd sine wa.e input signa. a. 1 MHz frequency shows tota. ha.monic distortion (THD) better tha. -40 dB over the tuning ra.ge of the tra.sconducta.ce. The OTa.ha. been used to rea.ize a.tuna.le Gm-C low-pa.s filter with ga.n tuning from 5 dB to 21 dB with 4 dB ga.n steps, which results in power consumptions of 411.6 to 646.8 μW. This low volta.e filter ca. opera.e a. cha.nel select filter a.d va.ia.le ga.n a.plifier (VGa. for wireless sensor network (WSN) a.plica.ions. The proposed OTa.a.d filter ha.e been simula.ed in 0.18 μm CMOS technology. Corner ca.e a.d tempera.ure simula.ion results a.e a.so included to foreca.t process a.d tempera.ure va.ia.ion a.fects a.ter fa.rica.ion.

关键词： OTA Low Volta.e Low Power Bulk Driven Gm-C Filter

MHD Free Convection Flow pa.t a. Inclined Stretching Sheet with Considering Viscous Dissipa.ion a.d Ra.ia.ion

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Open Journa. of Fluid Dyna.ics 2017年第2期7卷 152-168页

作者： Ma.uf Ha.a. Ena.ul Ka.im a.dus samad Depa.tment of Ma.hema.ics Comilla University Comilla Bangladesh Depa.tment of a.plied Ma.hema.ics University of Dhaka Dhaka Bangladesh

The present study concentra.es on the a.a.ysis of MHD free convection flow pa.t a. inclined stretching sheet. The viscous dissipa.ion a.d ra.ia.ion effects a.e a.sumed in the hea. equa.ion. a.proxima.ion solutions ha.e been derived for velocity, tempera.ure, concentra.ion, Nusselt number, skin friction a.d Sherwood number using Na.htsheim-Swigert shooting itera.ion technique a.ong with the six-order Runge-Kutta.itera.ion scheme. Gra.hs a.e plotted to find out the cha.a.teristics of different physica. pa.a.eters. The va.ia.ions of physica. pa.a.eters on skin friction coefficient, Nusselt number a.d Sherwood number a.e displa.ed via.ta.le.

关键词： Viscous Dissipa.ion Ma.netic Field Skin Friction Eckert Number

The Bipha.ic Role of Cupper a.d Countera.tion with <i>a.ospirillum bra.ilense</i>a.plica.ion on Growth, Meta.olities, Osmotic Pressure a.d Minera. of Whea. Pla.t

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a.erica. Journa. of Pla.t Sciences 2017年第5期8卷 1182-1195页

作者： Ha.dia.M. a.d El-samad Bota.y a.d Microbiology Depa.tment Faculty of Science Minia University El-Minia Egypt

The intera.tive effect of different Cu++ concentra.ions (5 mM, 10 mM, 20 mM a.d 25 mM) a.d trea.ments with biofertilizers a.ospirillum bra.ilense on growth, meta.olites, minera.s a.d osmotic pressure of whea. pla.ts wa. investiga.ed. Shoots a.d roots of whea. pla.t were differentia.ly response to Cu++ trea.ments, while shoot orga. response positively to this trea.ment, root response nega.ively. The positive effect of Cu++ in shoot orga. wa. concomita.t with the increa.e in the production of fresh, dry ma.ter, length a.d wa.er content a.d this rela.ed with the a.cumula.ion of soluble suga., soluble protein a.d minera. a. a.result of increa.ing osmotic pressure. On the other side, the nega.ive effect of Cu++ on root orga. wa. concomita.t with the decrea.e in production of fresh, dry ma.ter, length a.d wa.er content tha. rela.ed with the reduction in the a.cumula.ion of soluble suga. a.d minera. with the insignifica.t cha.ge in osmotic pressure. a.ospirillum bra.ilense inocula.ion increa.ed the a.cumula.ion of soluble suga. a.d soluble protein which reflected a. increa.e in the production of fresh, dry ma.ter a.d wa.er content with increa.ing va.ues of osmotic pressure of the tested pla.ts under Cu++ trea.ment. Fina.ly, whea. pla.ts response differentia.ly to Cu++ trea.ment a.cording to its orga. a.d a.ospirillum bra.ilense trea.ment improved whea. pla.t efficiency to tolera.e the effect of Cu++ stress.

关键词： Cu++ Trea.ment a.ospirillum bra.ilense Whea.

Effect of Brownia. Diffusion on Squeezing Ela.tico-Viscous Na.ofluid Flow with Ca.ta.eo-Christov Hea. Flux Model in a.Cha.nel with Double Slip Effect

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a.plied Ma.hema.ics 2020年第4期11卷 277-291页

作者： Md Ena.ul Ka.im Md a.dus samad Depa.tment of a.plied Ma.hema.ics University of Dhaka Dhaka Bangladesh Depa.tment of Ma.hema.ics Comilla University Cumilla Bangladesh

The present study dea.s with the a.a.ysis of hea. tra.sfer of the unstea.y Ma.well na.ofluid flow in a.squeezed rota.ing cha.nel of a.porous extensile surfa.e subject to the velocity a.d therma. slip effects incorpora.ing the theory of hea. flow intensity of Ca.ta.eo-Christov model for the expression of the energy distribution in preference to the cla.sica. Fourier’s la.. a.set of tra.sforma.ions is occupied to renova.e the current model in a.system of nonlinea. ordina.y differentia. equa.ions tha. a.e numerica.ly decoded with the help of Ma.La. integra.ed function bvp4c. The effects of va.ious flow control pa.a.eters a.e investiga.ed for the momentum, tempera.ure a.d diffusion profiles, a. well a. for the wa.l shea.ing stress a.d the hea. a.d ma.s tra.sfer. The results a.e fina.ly described from the ma.eria. point of view. a.compa.ison of hea. flux models of Ca.ta.eo-Christov a.d Fourier is a.so performed. a. importa.t result from the present work is tha. the squeezing pa.a.eter is strong enough in the middle of the cha.nel to reta.d the fluid flow.

关键词： Ma.well Fluid Model Squeezing Flow Ela.tico-Viscous Na.ofluid Cha.nel Rota.ion

在玻璃表面上短时接触硅藻土和多杀菌素对四纹豆象的致死效应和亚致死效应(英文)

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昆虫学报 2012年第11期55卷 1289-1294页

作者： Ehsa. Pa.Sa.Ya. Moosa.Sa.ER samad VOJOUDI Depa.tment of Pla.t Protection Faculty of AgricultureUniversity of Maragheh Young Resea.chers Club Marand BranchIslamic Azad University

四纹豆象Ca.losobruchus ma.ula.us(F.)是伊朗豇豆种子上的主要贮藏害虫。控制这一害虫时,用生物杀虫剂比用常规杀虫剂更为合适。本研究评价了室内条件下在玻璃表面上硅藻土和多杀菌素对四纹豆象成虫的致死效应和亚致死效应。结果表明:... 详细信息

四纹豆象Ca.losobruchus ma.ula.us(F.)是伊朗豇豆种子上的主要贮藏害虫。控制这一害虫时,用生物杀虫剂比用常规杀虫剂更为合适。本研究评价了室内条件下在玻璃表面上硅藻土和多杀菌素对四纹豆象成虫的致死效应和亚致死效应。结果表明:硅藻土处理24h和48h后,对四纹豆象成虫的LC50值分别为1.47和0.2g/m2;多杀菌素处理24h和48h后,对四纹豆象成虫的LC50值分别为102.9和68.8mga./L,说明两种化合物都对四纹豆象成虫具有较高的急性毒性。通过检测生物学参数,研究了LC20浓度的硅藻土和多杀菌素对四纹豆象的亚致死效应。LC20浓度的硅藻土和多杀菌素使四纹豆象成虫的繁殖力分别比对照降低了71.5%和17.2%,卵孵化率降低了57.5%和27.8%,成虫寿命缩短了74.7%和17.1%。接触LC20浓度的硅藻土和多杀菌素使这一害虫的蛹期分别比对照延长了4.8%和2.3%。亚致死效应研究表明,硅藻土和多杀菌素对四纹豆象的生命参数均产生了负面影响。总之,致死效应和亚致死效应综合显示,硅藻土在防治四纹豆象上具有较大的潜力。

关键词：四纹豆象生物杀虫剂生命参数致死效应亚致死效应

Development of muta.ts with va.ying flowering times by ta.geted editing of multiple SVP gene copies in Bra.sica.na.us L.

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The Crop Journa. 2022年第1期10卷 67-74页

作者： Sunny a.ma. Yungu Zha. Huibin Hua.g Ka.di Yu Muha.ma. Ha.eez Ulla. Kha. Muha.ma. Sha.id Ra.a.a.dul samad Sha.id Ulla. Kha. Ola.eka. a.oo Chuchua. Fa. Yongming Zhou Na.iona. Key La.ora.ory of Crop Genetic Improvement Huazhong Agricultural UniversityWuhan 430070HubeiChina

Ma.ipula.ion of flowering time to develop cultiva.s with desired ma.urity da.es is funda.enta. in pla.t *** is desira.le to genera.e polyploid ra.eseed(Bra.sica.na.us L.)germpla.m with va.ying flowering time controlled by a.few *** the present study,Bna.SVP,a.ra.eseed homolog of the a.a.idopsis SVP(Short Vegeta.ive Pha.e)gene,wa. cha.a.terized a.d a.set of muta.ts wa. developed using a.CRISPR/Ca.9-ba.ed gene-editing tool.a.single construct ta.geting multiple sites wa. successfully a.plied to precisely muta.e four copies of Bna.*** induced muta.ions in these copies were sta.ly tra.smitted to subsequent *** muta.ts with loss-of-function a.leles a.d free tra.sgenic elements were genera.ed a.ross the four Bna.SVP *** muta.t T_(1)lines tested in two environments(summer a.d winter growing sea.ons)showed ea.ly-flowering *** decrea.e in flowering time wa. correla.ed with the number of muta.ed Bna.SVP *** qua.ruple muta.ts showed the shortest flowering time,with a.mea. decrea.e of 40.6%–50.7%in length rela.ive to the wild type under the two growth *** study demonstra.es the qua.tita.ive involvement of Bna.SVP copies in the regula.ion of flowering time a.d provides va.ua.le resources for ra.eseed breeding.

关键词： Bra.sica.na.us Flowering time Bna.VP Gene editing