|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Microbiologic spectrum of acute and chronic dacryocystitis显示文摘AIM:To report the microbiological spectrum of acute and chronic dacrocystitis.METHODS:Retrospective study on 100 patients who presented to the ophthalmic plastic clinic of a tertiary eye care center from May 2011 and April 2013 with acute and chronic dacryocystitis was reviewed for demographic and microbiological profile. The culture results and organisms isolated were recorded.RESULTS:Sixty patients had acute onset and the remaining 40 patients had chronic onset dacryocystitis.The female to male ratio was 1.78. The mean age of patients was 44 y. Gram-positive organisms were the most commonly isolated accounting for 54%, and the commonest species isolated was S. aureus in 26%.Percentage of gram positive cultures was higher in chronic dacryocystitis than acute ones(82% vs 48% of positive cultures; P =0.003). Also in culture positive acute dacryocystitis, gram negative species were found in 52%of eyes but only in 18% of chronic dacryocystitis.CONCLUSION:Gram negative bacteria, culture negative samples, unusual and more virulent organisms are more common in acute dacryocystitis than chronic ones. The results of this study have significant bearing on the treatment of patients with dacrocystitis. | Bahram Eshraghi Parisa Abdi Mohammadreza Akbari Masoud Aghsaei Fard | 2014 | International Journal of Ophthalmology(English edition)2014，7，5： | 11 |
| 2 | The Role and Function of Ras-association domain family in Cancer:A Review显示文摘Ras gene mutation has been observed in more than 30%of cancers,and 90%of pancreatic,lung and colon cancers.Ras proteins(K-Ras,H-Ras,N-Ras)act as molecular switches which are activated by binding to GTP.They play a role in the cascade of cell process control(proliferation and cell division).In the inactive state,transforming GTP to GDP leads to the activation of GTpase in Ras gene.However,the mutation in Ras leads to the loss of internal GTPase activity and permanent activation of the protein.The activated Ras can promote the cell death or stop cell growth,which are facilitated by Ras-association domain family.Various studies have been conducted to determine the importance of losing RASSF proteins in Rasinduced tumors.This paper examines the role of Ras and RASSF proteins.In general,RASSF proteins can be used as a suitable means for targeting a large group of Ras-induced tumors. | Mohammad Reza Zinatizadeh Seyed Ali Momeni Peyman Kheirandish Zarandi Ghanbar Mahmoodi Chalbatani Hassan Dana Hamid Reza Mirzaei Mohammad Esmaeil Akbari Seyed Rouhollah Miri | 2019 | Genes & Diseases2019，6，4： | 10 |
| 3 | Positive evidence for vitamin A role in prevention of type 1 diabetes显示文摘Type 1 diabetes mellitus(T1DM) as one of the most well-known autoimmune disease, results from the destruction of β-cells in pancreas by autoimmune process. T1 DM is fatal without insulin treatment. The expansion of alternative treatment to insulin is a dream to be fulfilled. Currently autoimmunity is considered as main factor in development of T1 DM. So manipulation of the immune system can be considered as alternative treatment to insulin. For the past decades, vitamin A has been implicated as an essential dietary micronutrient in regulator of immune function. Despite major advantage in the knowledge of vitamin A biology, patients who present T1 DM are at risk for deficiency in vitamin A and carotenoids. Applying such evidences, vitamin A treatment may be the key approach in preventing T1 DM. | Somaye Yosaee Maryam Akbari Fakhrabadi Farzad Shidfar | 2016 | World Journal of Diabetes2016，7，9： | 8 |
| 4 | Reserve estimation of an open pit mine under price uncertainty by real option approach显示文摘Reserve estimation is a key to find the correct NPV in a mining project. The most important factor in reserve estimation is the metal price. Metal price fluctuations in recent years were exaggerated, and imposed a high degree of uncertainty to the reserve estimation, and in consequence to the whole mine planning procedure. Real option approach is an efficient method of decision making in the uncertain conditions. This approach has been used for evaluation of defined natural resources projects until now. This study considering the metal price uncertainty used real option approach to prepare a methodology for reserve estimation in open pit mines. This study was done on a copper cylindrical deposit, but the achieved methodology can be adjusted for all kinds of deposits. This methodology was comprehensively described through the examples in such a manner that can be used by the mine planners. | AKBARI Afshin Dehkharghani OSANLOO Morteza SHIRAZI Mohsen Akbarpour | 2009 | Mining Science and Technology2009，19，6： | 8 |
| 5 | Multiple linear regression, artificial neural network, and fuzzy logic prediction of 28 days compressive strength of concrete显示文摘评估在里面然而,借助于核心的压缩力量从变硬的水泥割了的 situ 水泥作为最平常的方法被承认自从它被象不同混合图案那样的许多因素影响,预言水泥的压缩力量是很困难的,混合的方法,治好条件,压缩,等等。在这份报纸,就试验性的结果而言,多重线性回归模型( MLR )的三个不同模型,人工的神经网络( ANN ),和适应neuro模糊的推理系统( ANFIS )被建立,训练,并且为与 173 个不同混合图案预言水泥的 28 天压缩的力量在 Matlab 编程环境以内测试了。最后,这三个模型与对方相比并且导致 ANN 和 ANFIS 模型使我们能然而,可靠地与不同混合图案评估水泥的压缩力量的事实因为在具体混合参数之间的非线性的关系,多重线性回归模型不在这个区域是足够可行的。最后,为具体压缩力量预言上的参数的二个不同集合的敏感分析(SA ) 被执行。 | Faezehossadat KHADEMI Mahmoud AKBARI Sayed Mohammadmehdi JAMAL Mehdi NIKOO | 2017 | Frontiers of Structural and Civil Engineering2017，11，1： | 8 |
| 6 | A more consistent intraluminal rhesus monkey model of ischemic stroke显示文摘Endovascular surgery is advantageous in experimentally induced ischemic stroke because it causes fewer cranial traumatic lesions than invasive surgery and can closely mimic the pathophysiology in stroke patients. However, the outcomes are highly variable, which limits the accuracy of evaluations of ischemic stroke studies. In this study, eight healthy adult rhesus monkeys were randomized into two groups with four monkeys in each group: middle cerebral artery occlusion at origin segment(M1) and middle cerebral artery occlusion at M2 segment. The blood flow in the middle cerebral artery was blocked completely for 2 hours using the endovascular microcoil placement technique(1 mm × 10 cm)(undetachable), to establish a model of cerebral ischemia. The microcoil was withdrawn and the middle cerebral artery blood flow was restored. A reversible middle cerebral artery occlusion model was identified by hematoxylin-eosin staining, digital subtraction angiography, magnetic resonance angiography, magnetic resonance imaging, and neurological evaluation. The results showed that the middle cerebral artery occlusion model was successfully established in eight adult healthy rhesus monkeys, and ischemic lesions were apparent in the brain tissue of rhesus monkeys at 24 hours after occlusion. The rhesus monkeys had symptoms of neurological deficits. Compared with the M1 occlusion group, the M2 occlusion group had lower infarction volume and higher neurological scores. These experimental findings indicate that reversible middle cerebral artery occlusion can be produced with the endovascular microcoil technique in rhesus monkeys. The M2 occluded model had less infarction and less neurological impairment, which offers the potential for application in the field of brain injury research. | Bo Zhao Guowei Shang Jian Chen Xiaokun Geng Xin Ye Guoxun Xu Ju Wang Jiasheng Zheng Hongjun Li Fauzia Akbary Shengli Li Jing Lu Feng Ling Xunming Ji | 2014 | Neural Regeneration Research2014，9，23： | 6 |
| 7 | Field investigation on effects of railway track geometric parameters on rail wear显示文摘Rail wear has dramatic impact on track performance, ride quality and maintenance costs. The amount of rail wear is influenced by various elements among which geometric parameters play an important role. The amount of wear in Iran’s railway lines and its imposed maintenance costs oblige us to make modifications on the various geometrical parameters. In order to ensure the effectiveness of these changes, it is necessary to investigate these parameters and their effects on the wear. This research is aimed at studying the effects of different track geometrical parameters on the vertical and lateral wear by conducting a three phase field investigation. The first phase was carried out at the switches of a station, the second phase at a straight line, and the third at a curved line out of the station. The results obtained are analyzed and the role of each track geometrical parameter in the rail wear is discussed. Recommendations for prevention or reduction of rail wear are presented. | SADEGHI J. AKBARI B. | 2006 | Journal of Zhejiang University-Science A(Applied Physics & Engineering)2006，7，11： | 6 |
| 8 | A toolkit of thread-based microfluidics,sensors,and electronics for 3D tissue embedding for medical diagnostics显示文摘Threads,traditionally used in the apparel industry,have recently emerged as a promising material for the creation of tissue constructs and biomedical implants for organ replacement and repair.The wicking property and flexibility of threads also make them promising candidates for the creation of three-dimensional(3D)microfluidic circuits.In this paper,we report on thread-based microfluidic networks that interface intimately with biological tissues in three dimensions.We have also developed a suite of physical and chemical sensors integrated with microfluidic networks to monitor physiochemical tissue properties,all made from thread,for direct integration with tissues toward the realization of a thread-based diagnostic device(TDD)platform.The physical and chemical sensors are fabricated from nanomaterial-infused conductive threads and are connected to electronic circuitry using thread-based flexible interconnects for readout,signal conditioning,and wireless transmission.To demonstrate the suite of integrated sensors,we utilized TDD platforms to measure strain,as well as gastric and subcutaneous pH in vitro and in vivo. | Pooria Mostafalu Mohsen Akbari Kyle A.Alberti Qiaobing Xu Ali Khademhosseini Sameer R.Sonkusale | 2016 | Microsystems & Nanoengineering2016，2，1： | 6 |
| 9 | Blastability evaluation for rock mass fragmentation in Iran central iron ore mines显示文摘In this research, we investigated the influence of rock mass properties, blast design parameters and explosive properties on blast fragmentation. Rock mass properties were evaluated in 51 blasting blocks using engineering geological mapping of 1961 meters of the scanline, experiments on intact rock samples and measuring P-wave velocity(Vp) for 1771 meters of seismic profiles. The results indicate that increasing spacing, persistence, opening, roughness, waviness of discontinuities, and Vp and uniaxial compressive strength(UCS) of intact rock as well as the increase of discontinuities angle with the bench face of blasting block will increase the size distribution of blasted rocks. In addition, evaluation of the influence of connector type, specific drilling and specific charge has shown that using the Nonel system will decrease the mean size of fragmentation. It is also demonstrated that increasing specific drilling and specific charge quantities will result in the increase of mean size of fragmentation. | Akbari Majid Lashkaripour Gholamreza Yarahamdi Bafghi Alireza Ghafoori Mohammad | 2015 | International Journal of Mining Science and Technology2015，25，1： | 5 |
| 10 | Dedifferentiated liposarcoma arising from the sigmoid mesocolon: A case report显示文摘Dedifferentiated liposarcoma is a variant of liposarcoma with a more aggressive course. It occurs most commonly in the retroperitoneum and rarely in other anatomic locations. In the present report, we describe a case of dedifferentiated liposarcoma that occurred in an unusual location, sigmoid mesocolon, which has not yet been documented. | Brody Winn John Gao Homayoon Akbari Baishali Bhattacharya | 2007 | World Journal of Gastroenterology2007，13，30： | 5 |
| 11 | The Hippo Tumor Suppressor Pathway(YAP/TAZ/TEAD/MST/LATS)and EGFR-RAS-RAF-MEK in cancer metastasis显示文摘Hippo Tumor Suppressor Pathway is the main pathway for cell growth that regulates tissue enlargement and organ size by limiting cell growth.This pathway is activated in response to cell cycle arrest signals(cell polarity,transduction,and DNA damage)and limited by growth factors or mitogens associated with EGF and LPA.The major pathway consists of the central kinase of Ste20 MAPK(Saccharomyces cerevisiae),Hpo(Drosophila melanogaster)or MST kinases(mammalian)that activates the mammalian AGC kinase dmWts or LATS effector(MST and LATS).YAP in the nucleus work as a cofactor for a wide range of transcription factors involved in proliferation(TEA domain family,TEAD1-4),stem cells(Oct4 mononuclear factor and SMAD-related TGFb effector),differentiation(RUNX1),and Cell cycle/apoptosis control(p53,p63,and p73 family members).This is due to the diverse roles of YAP and may limit tumor progression and establishment.TEAD also coordinates various signal transduction pathways such as Hippo,WNT,TGFb and EGFR,and effects on lack of regulation of TEAD cancerous genes,such as KRAS,BRAF,LKB1,NF2 and MYC,which play essential roles in tumor progression,metastasis,cancer metabolism,immunity,and drug resistance.However,RAS signaling is a pivotal factor in the inactivation of Hippo,which controls EGFR-RAS-RAF-MEK-ERKmediated interaction of Hippo signaling.Thus,the loss of the Hippo pathway may have significant consequences on the targets of RAS-RAF mutations in cancer. | Mohammad Reza Zinatizadeh Seyed Rouhollah Miri Peyman Kheirandish Zarandi Ghanbar Mahmoodi Chalbatani Catarina Raposo Hamid Reza Mirzaei Mohammad Esmaeil Akbari Habibollah Mahmoodzadeh | 2021 | Genes & Diseases2021，8，1： | 5 |
| 12 | Essential Oil from Citrus aurantium Alleviates Anxiety of Patients Undergoing Coronary Angiography: A Single-Blind, Randomized Controlled Trial显示文摘Objective To determine the effectiveness and safety of essential oil from Citrus aurantium on anxiety in patients undergoing coronary angiography.Methods A single-blind,randomized controlled trial was conducted in 80 patients experiencing coronary angiography in Imam Ali Hospital in Kermanshah,Iran from April to November in 2016.All patients were randomly divided into intervention and control groups by a random number table,40 cases in each group.The patients in the intervention group inhaled Citrus aurantium essential oil for 15–20 min about 60 min before angiography.Following the same procedure,distilled water was used instead of Citrus aurantium in the control group.Spielbergers State-Trait Anxiety Inventory(STAI)was filled in and vital signs including systolic blood pressure(SBP),diastolic blood pressure(DBP),respiratory and pulse rate were recorded before and 20 min after the intervention.Adverse reactions after intervention were observed.Results In the intervention group,the mean scores of STAI,SBP,DBP,respiratory and pulse rate were 53.30±10.13,134.82±11.75 mm Hg,84.49±6.99 mm Hg,17.87±1.73 times/min,and 76.48±12.55 beats/min at baseline and significantly decreased to 42.37±10.15,124.49±10.48 mm Hg,79.23±6.62 mm Hg,14.54±1.43 times/min,and 70.03±13.66 beats/min respectively 20 min after intervention(all P<0.05);however,in the control group,neither anxiety scores nor vital signs changed significantly(P>0.05).All subjects reported no adverse reactions.Conclusion Inhalation of the essential oil from Citrus aurantium was effective in reducing anxiety and stress levels in patients undergoing coronary angiography. | Khalil Moradi Hossein Ashtarian Nicholas Yakubu Danzima Hamid Saeedi Behrouz Bijan Farzaneh Akbari Mohammad Mehdi Mohammadi | 2021 | Chinese Journal of Integrative Medicine2021，27，3： | 4 |
| 13 | Manufacture and characterization of graphene membranes with suspended silicon proof masses for MEMS and NEMS applications显示文摘Graphene’s unparalleled strength,chemical stability,ultimate surface-to-volume ratio and excellent electronic properties make it an ideal candidate as a material for membranes in micro-and nanoelectromechanical systems(MEMS and NEMS).However,the integration of graphene into MEMS or NEMS devices and suspended structures such as proof masses on graphene membranes raises several technological challenges,including collapse and rupture of the graphene.We have developed a robust route for realizing membranes made of double-layer CVD graphene and suspending large silicon proof masses on membranes with high yields.We have demonstrated the manufacture of square graphene membranes with side lengths from 7µm to 110µm,and suspended proof masses consisting of solid silicon cubes that are from 5µm×5µm×16.4µm to 100µm×100µm×16.4µm in size.Our approach is compatible with wafer-scale MEMS and semiconductor manufacturing technologies,and the manufacturing yields of the graphene membranes with suspended proof masses were>90%,with>70%of the graphene membranes having>90%graphene area without visible defects.The measured resonance frequencies of the realized structures ranged from tens to hundreds of kHz,with quality factors ranging from 63 to 148.The graphene membranes with suspended proof masses were extremely robust,and were able to withstand indentation forces from an atomic force microscope(AFM)tip of up to~7000nN.The proposed approach for the reliable and large-scale manufacture of graphene membranes with suspended proof masses will enable the development and study of innovative NEMS devices with new functionalities and improved performances. | Xuge Fan Anderson D.Smith Fredrik Forsberg Stefan Wagner Stephan Schroder Sayedeh Shirin Afyouni Akbari Andreas C.Fischer Luis Guillermo Villanueva Mikael Ostling Max C.Lemme Frank Niklaus | 2020 | Microsystems & Nanoengineering2020，6，1： | 4 |
| 14 | Gas–liquid flow mass transfer in a T-shape microreactor stimulated with 1.7 MHz ultrasound waves显示文摘This paper describes the application of ultrasound waves on hydrodynamics and mass transfer characteristics in the gas–liquid flow in a T-shape microreactor with a diameter of 800 μm. A 1.7 MHz piezoelectric transducer(PZT) was employed to induce the vibration in this microreactor. Liquid side volumetric mass transfer coefficients were measured by physical and chemical methods of CO_2 absorption into water and Na OH solution. The approach of absorption of CO_2 into a 1 mol·L^(-1) Na OH solution was used for analysis of interfacial areas. With the help of a photography system, the fluid flow patterns inside the microreactor were analyzed. The effects of superficial liquid velocity, initial concentration of Na OH, superficial CO_2 gas velocity and length of microreactor on the mass transfer rate were investigated. The comparison between sonicated and plain microreactors(microreactor with and without ultrasound) shows that the ultrasound wave irradiation has a significant effect on kLa and interfacial area at various operational conditions. For the microreactor length of 12 cm, ultrasound waves improved kLa and interfacial area about 21% and 22%, respectively. From this study, it can be concluded that ultrasound wave irradiation in microreactor has a great effect on the mass transfer rate. This study suggests a new enhancement technique to establish high interfacial area and kLa in microreactors. | Mona Akbari Masoud Rahimi Mahboubeh Faryadi | 2017 | Chinese Journal of Chemical Engineering2017，25，9： | 4 |
| 15 | Analysis of dynamic wave model for flood routing in natural rivers显示文摘Flooding is a common natural disaster that causes enormous economic, social, and human losses. Of various flood routing methods, the dynamic wave model is one of the best approaches for the prediction of the characteristics of floods during their propagations in natural rivers because all of the terms of the momentum equation are considered in the model. However, no significant research has been conducted on how the model sensitivity affects the accuracy of the downstream hydrograph. In this study, a comprehensive analysis of the input parameters of the dynamic wave model was performed through field applications in natural rivers and routing experiments in artificial channels using the graphical multi-parametric sensitivity analysis (GMPSA). The results indicate that the effects of input parameter errors on the output results are more significant in special situations, such as lower values of Manning's roughness coefficient and/or a steeper bed slope on the characteristics of a design hydrograph, larger values of the skewness factor and/or time to peak on the channel characteristics, larger values of Manning's roughness coefficient and/or the bed slope on the space step, and lower values of Manning's roughness coefficient and/or a steeper bed slope on the time step and weighting factor. | Reza BARATI Sajjad RAHIMI Gholam Hossein AKBARI | 2012 | Water Science and Engineering2012，5，3： | 3 |
| 16 | An empirical study on vortex-generator insert fitted in tubular heat exchangers with dilute Cu–water nanofluid flow显示文摘The heat transfer enhancement(HTE) in tubular heat exchangers fitted with vortex-generator(VG) inserts is experimentally investigated. The studied four parameters and ranges are: winglets-pitch ratio(1.33, 2.67, and 4),winglets-length ratio(0.33, 0.67, and 1), winglets-width ratio(0.2, 0.4, and 0.6), and Reynolds number(5200to 12200). The testing fluids are the water and Cu–water nanofluid at the volumetric fraction of 0.2%. The results obtained on HTE, pressure drop, and performance evaluation criterion(PEC) are compared with those for water in a smooth tube. It is found that the VG inserts with lower winglets-pitch ratio and higher winglets-length/width ratios present higher values of HTE and pressure drop. Over the range studied, the maximum PEC of 1.83 is detected with the Cu–water nanofluid inside the tube equipped with a VG insert at the winglets-width ratio of0.6 for the maximum Reynolds number, when the heat transfer rate and pressure drop are 1.24 times and 2.03 times of those in the smooth tube. Generalized regression equations of the Nusselt number, friction factor, and PEC are presented for the tubular heat exchangers with the VG inserts for both water and Cu–water nanofluid.It is concluded that the main advantage of the VG inserts is their simple fabrication and considerable performance, particularly at higher Reynolds number. | M. Khoshvaght-Aliabadi M.H. Akbari F. Hormozi | 2016 | Chinese Journal of Chemical Engineering2016，24，6： | 3 |
| 17 | Hospitalized prevalence and 5-year mortality for IBD:Record linkage study显示文摘AIM:To establish the hospitalized prevalence of severe Crohn's disease(CD) and ulcerative colitis(UC) in Wales from 1999 to 2007;and to investigate long-term mortality after hospitalization and associations with social deprivation and other socio-demographic factors.METHODS:Record linkage of administrative inpatient and mortality data for 1467 and 1482 people hospitalised as emergencies for ≥ 3d for CD and UC,respectively.The main outcome measures were hospitalized prevalence,mortality rates and standardized mortality ratios for up to 5 years follow-up after hospitalization.RESULTS:Hospitalized prevalence was 50.1 per 100 000 population for CD and 50.6 for UC.The hospitalized prevalence of CD was significantly higher(P < 0.05) in females(57.4) than in males(42.2),and was highest in people aged 16-29 years,but the prevalence of UC was similar in males(51.0) and females(50.1),and increased continuously with age.The hospital-ized prevalence of CD was slightly higher in the most deprived areas,but there was no association between social deprivation and hospitalized prevalence of UC.Mortality was 6.8% and 14.6% after 1 and 5 years follow-up for CD,and 9.2% and 20.8% after 1 and 5 years for UC.For both CD and UC,there was little discernible association between mortality and social deprivation,distance from hospital,urban/rural residence and geography.CONCLUSION:CD and UC have distinct demographic profiles.The higher prevalence of hospitalized CD in more deprived areas may reflect higher prevalence and higher hospital dependency. | Lori A Button Stephen E Roberts Michael J Goldacre Ashley Akbari Sarah E Rodgers John G Williams | 2010 | World Journal of Gastroenterology2010，16，4： | 3 |
| 18 | Cerebral state index versus Glasgow coma scale as a predictor for in-hospital mortality in brain-injured patients显示文摘ObjectiveTo 在预言尖锐伤害大脑的 patients.MethodsIn 的医院分泌物地位上比较格拉斯哥昏迷规模(GCS ) 和服的州的索引(CSI ) 的价值没收到 sedatives, GCS 和 CSI 的 60 个伤害大脑的病人每天在开始的 10 期间被测量;住院的天。预示的截止的点的结果被 GCS 和关于承认的时间和第三天住院操作特征(巨鸟) 曲线的 CSI 使用接收装置计算。为两个索引的敏感,特性和另外的预兆的价值是 calculated.ResultsOf 60 个估计的病人,有的 14 个病人温和,中等的有的 13 个病人和 33 个病人有严重损害。在学习的功课期间, 17 个病人(28.3%) 处于他们的状况败坏了并且死。在在住院期间死亡了的病人的吝啬的 GCS 和 CSI 比从医院被解除的那些显著地低。GCS < 4.5 并且 CSI < 64.5 在创伤的大脑损害病人与更高的死亡风险在承认的时候被联系, GCS 比 CSI 更敏感在这些病人预言在里面医院死亡。为住院的第一天,在巨鸟曲线下面的区域为 GCS 是 0.947, 0.732 为在 ICU 承认的 CSI.ConclusionGCS 分数是在里面医院死亡的一个好预言者。GCS < 4.5 并且 CSI < 64.5 在创伤的大脑损害病人与更高的死亡风险在承认的时候被联系, GCS 是比在在这些病人预言死亡的 CSI 更敏感的。 | Mehrdad Mahdian Mohammad Reza Fazel Esmaeil Fakharian Hossein Akbari Soroush Mahdian | 2014 | Chinese Journal of Traumatology2014，17，4： | 3 |
| 19 | A noise cross PSD estimator for dual-microphone speech enhancement based on minimum statistics显示文摘Some two-microphone noise reduction techniques that work in the frequency domain exploit coherence function between two noisy signals. They have shown good results when noise signals on two sensors are uncorrelated, but their per-formance decreases with correlated noises. Coherence based methods can be improved when the cross power spectral density (CPSD) of correlated noise signals is available. In this paper, we propose a new method for estimation of the CPSD of the noise, which is based on the minimum tracking technique. Despite the fact that the proposed estimator does not need to implement a voice activity detector (VAD), its performance is comparable to a CPSD estimator that uses an ideal VAD. | Mohsen RAHMANI Ahmad AKBARI Beghdad AYAD Nima DERAKHSHAN | 2009 | Journal of Zhejiang University-Science A(Applied Physics & Engineering)2009，10，6： | 3 |
| 20 | Cellulose-based composite scaffolds for bone tissue engineering and localized drug delivery显示文摘Natural bone constitutes a complex and organized structure of organic and inorganic components with limited ability to regenerate and restore injured tissues,especially in large bone defects.To improve the reconstruction of the damaged bones,tissue engineering has been introduced as a promising alternative approach to the conventional therapeutic methods including surgical interventions using allograft and autograft implants.Bioengineered composite scaffolds consisting of multifunctional biomaterials in combination with the cells and bioactive therapeutic agents have great promise for bone repair and regeneration.Cellulose and its derivatives are renewable and biodegradable natural polymers that have shown promising potential in bone tissue engineering applications.Cellulose-based scaffolds possess numerous advantages attributed to their excellent properties of non-toxicity,biocompatibility,biodegradability,availability through renewable resources,and the low cost of preparation and processing.Furthermore,cellulose and its derivatives have been extensively used for delivering growth factors and antibiotics directly to the site of the impaired bone tissue to promote tissue repair.This review focuses on the various classifications of cellulose-based composite scaffolds utilized in localized bone drug delivery systems and bone regeneration,including cellulose-organic composites,cellulose-inorganic composites,cellulose-organic/inorganic composites.We will also highlight the physicochemical,mechanical,and biological properties of the different cellulose-based scaffolds for bone tissue engineering applications. | Mahsa Janmohammadi Zahra Nazemi Amin Orash Mahmoud Salehi Amir Seyfoori Johnson V.John Mohammad Sadegh Nourbakhsh Mohsen Akbari | 2023 | Bioactive Materials2023，，2： | 3 |
您所在的机构暂未开通此部分的功能，请联系管理员