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Journal of Environmental Sciences 2014年第10期26卷 1970-1976页

作者： Yang Li Yaobin Zhang Xie Quan Jingxin Zhang Shuo Chen shahzad Afzal Key Laboratory of Industrial Ecology and Environmental Engineering Ministry of Education School of Environmental Science and TechnologyDalian University of Technology

Accumulation of hydrogen during anaerobic processes usually results in low decomposition of volatile organic acids（VFAs）. On the other hand, hydrogen is a good electron donor for dye reduction, which would help the acetogenic conversion in keeping low hydrogen concentration. The main objective of the study was to accelerate VFA composition through using azo dye as electron acceptor. The results indicated that the azo dye serving as an electron acceptor could avoid H2 accumulation and accelerate anaerobic digestion of VFAs. After adding the azo dye, propionate decreased from 2400.0 to 689.5 mg/L and acetate production increased from 180.0 to 519.5 mg/L. It meant that the conversion of propionate into acetate was enhanced. Fluorescence in situ hybridization analysis showed that the abundance of propionate-utilizing acetogens with the presence of azo dye was greater than that in a reference without azo dye. The experiments via using glucose as the substrate further demonstrated that the VFA decomposition and the chemical oxygen demand（COD） removal increased by 319.7 mg/L and 23.3% respectively after adding the azo dye. Therefore, adding moderate azo dye might be a way to recover anaerobic system from deterioration due to the accumulation of H2 or VFAs.

关键词： Azo dye Anaerobic treatment Volatile fatty acids H2accumulation

Impacts of nuclear energy,greener energy,and economic progress on the load capacity factor:What we learn from the leading nuclear power economies?

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Geoscience Frontiers 2024年第3期15卷 322-335页

作者： Wei Teng Monirul Islam LászlóVasa Shujaat Abbas Umer shahzad School of Business Qilu Institute of TechnologyJinan 250200ShandongChina Graduate School of Economics and Management(GSEM) Ural Federal University(UrFU)YekaterinburgRussia Bangladesh Institute of Governance and Management(BIGM) University of DhakaBangladesh Széchenyi Istvàn University Faculty of EconomicsHungary School of Economics Széchenyi Istvàn UniversityGyorHungary Department of Trade and Finance Faculty of Economics and ManagementCzech University of Life Sciences PragueCzech Republic Adnan Kassar School of Business Lebanese American UniversityBeirutLebanon

The worldwide tremor of environmental degradation commonly represents the escalation of emissions levels and ecological footprints that harm the planet’s *** is because of using gigantic non-renewable energy resources,urbanization stream and massive economic activities in the major industrialized *** this situation,we investigate the influence of disaggregated energy measures,e.g.,renewable,and nuclear energy,income growth and urbanization on the load capacity factor(biocapacity divided by the ecological footprint)of major nuclear power countries,such as France,the USA,Canada,China,and Russia during *** this end,we utilize the CS-ARDL procedure because of the endogeneity,common correlation,non-stationarity in data and heterogeneity in panel *** contribute to considering the supply side dynamic of environmental degradation parameter,the load capacity,from the perspective of the top nuclear power nations that deviates our analysis from the prevailing scholarly ***,our findings confirm a significantly positive impact of renewable and nuclear energy on the load capacity factor in improving environmental ***,economic growth and urbanization negatively affect the load capacity dynamics in spurring environmental *** findings are robust across an alternative estimation technique,namely the Dumitrescu and Hurlin(DH)causation ***,we recommend formulating pragmatic policies to deter the detrimental effects of income and urbanization by properly utilizing sustainable energy resources to conserve the natural environment.

关键词： Renewable energy Economic growth Urbanization Load capacity Environmental degradation Top nuclear power countries

Fission of Weakly Prolate 119Sn and Weakly Oblate ^(209)Bi Nuclei Induced by 500 and 672 MeV Negative Pions

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Chinese Physics Letters 2011年第9期28卷 88-91页

作者： Mukhtar Ahmed Rana Gul Sher Shahid Manzoor M.I.shahzad Physics Division Pakistan Institute of Nuclear Science and Technology(PINSTECH)P.O.NiloreIslamabadPakistan

Fission cross-sections of ^(119)Sn and ^(209)Bi induced by negative pions of two energies 500 and 672 MeV were measured using a CR−39 nuclear track ***-detector stacks were exposed to pion beams at the Brookhaven National Laboratory(USA).Measurement results are compared with the corresponding calculations using the computer code *** between measurements and calculations is fairly good for the ^(209)Bi target nuclei whereas it is poor for 119Sn at both investigated energies of 500 and 672 *** cross−section results of^( 119)Sn and ^(209)Bi are explained using the equilibrium properties of these nuclides including nuclear electric quadrupole moments which determine the shapes of nuclei.A logarithmic dependence of fission cross−section on Z^(2)/A is observed for the above−mentioned reactions and a critical limit of Z^(2)/A is identified with the value of 30 which divides the curve ofσf versus Z2/A into two regimes,one with weak dependence and the other with strong dependence.

关键词： Weakly mentioned limit

A New Hybrid SARFIMA-ANN Model for Tourism Forecasting

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Computers, Materials & Continua 2022年第6期71卷 4785-4801页

作者： Tanzila Saba Mirza Naveed shahzad Sonia Iqbal Amjad Rehman Ibrahim Abunadi Artificial Intelligence&Data Analytics Research Lab(AIDA) CCIS Prince Sultan UniversityRiyadh11586Saudi Arabia Department of Statistics University of GujratGujrat50700Pakistan Department of Statistics University of SialkotSialkot51310Pakistan

Many countries developed and increased greenery in their country sights to attract international *** planning is now significantly contributing to their *** next task is to facilitate the tourists by sufficient arrangements and providing a green and clean environment;it is only possible if an upcoming number of tourists’arrivals are accurately *** accurate prediction is not easy as empirical evidence shows that the tourists’arrival data often contains linear,nonlinear,and seasonal *** traditional model,like the seasonal autoregressive fractional integrated moving average(SARFIMA),handles seasonal trends with *** contrast,the artificial neural network(ANN)model deals better with nonlinear time *** get a better forecasting result,this study combines the merits of the SARFIMA and the ANN models and the purpose of the hybrid SARFIMA-ANN ***,we have used the proposed model to predict the tourists’arrival inNew Zealand,Australia,and *** results showed that the proposed hybrid model outperforms in predicting tourists’arrival compared to the traditional SARFIMA and ANN ***,these results can be generalized to predict tourists’arrival in any country or region with a complicated data pattern.

关键词： SARFIMA hybrid model tourists’arrival forecasting ANN

A PHEMT Based Wideband LNA for Wireless Applications

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China Communications 2015年第10期12卷 108-116页

作者： Muhammad Saad Khan ZHANG Hongxin HE Pengfei Sulman shahzad Rahat Ullah School of Electronic Engineering Beijing University of Posts and Telecommunications(BUPT) Electrical Engineering Department University College of Engineering & TechnologyBahauddin Zakariya University Institute of Science and Technology for Opto-electronic Information Yantai University State Key Laboratory of Information Photonics and Optical Communications Beijing University of Posts and Telecommunications

This work is about the development of a super low noise amplifier with minimum power consumption and high gain for several wireless *** amplifier operates at frequency bands of 0.9-2.4 GHz and can be used in many applications like Wireless local area network(WLAN),WiFi,Bluetooth,ZigBee and Global System for mobile communications(GSM).This new design can be employed for the IEEE 802.15.4 standard in industrial,scientific and medical(ISM) *** enhancement mode pseudomorphic high electron mobility transistor PHEMT is used here due to its high linearity,better performance and less noisy *** common source inductive degeneration method is employed here to enhance the gain of *** amplifier produces a gain of more than 17 dB and noise figure of about 0.5 *** lower values of S11 and S22 reflect the accuracy of impedance matching network placed at the input and output sides of *** Advance Design System(ADS) is used for the design and simulation *** the layout of design is developed on the FR4 substrate.

关键词： low noise amplifier phemt advanced design system wireless local area network global positioning system

Review of acute ischaemic stroke in Pakistan:progress in management and future perspectives

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Stroke & Vascular Neurology 2017年第1期2卷 30-39页

作者： Ali Zohair Nomani Sumaira Nabi Mazhar Badshah shahzad Ahmed Department of Neurology Pakistan Institute of Medical SciencesIslamabadPakistan

Ischaemic stroke is a major cause of neurological morbidity and *** objective of this review article is to summarise facts pertaining to acute ischaemic stroke and its various aspects in a developing country like Pakistan,where resources are limited and the healthcare system is *** large-scale epidemiological studies are available to determine the true incidence of stroke in *** reviewed the available literature on stroke from Pakistan and through this article we primarily aim to present the current acute ischaemic stroke management in Pakistan in juxtaposition to that of the developed *** also intend to highlight areas for future development and improvement in *** routine practice in Pakistan is that of using stat dose of aspirin in emergency(ER)at large with only a handful of centres offering thrombolytic therapy with recombinant tissue plasminogen activator for acute ischaemic *** too is faced with the problem of long window periods before the patient reaches a proper stroke care *** facilities of interventional therapies like arterial thrombolysis and endovascular surgery are non-existent and rehabilitation facilities *** opportunities for training physicians in acute stroke are also *** in children is underdiagnosed and that in women not availing facilities at stroke care *** basic research has gained pace regarding local demographic data,advanced research and genetic studies are extremely *** field of stroke neurology needs to grow at a substantial pace in Pakistan to be at par with the developed world.

关键词： routine centre Pakistan

The roles of focal adhesion and cytoskeleton systems in fluid shearstress-induced endothelial cell response

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BIOCELL 2020年第2期44卷 137-145页

作者： KHAWAR ALI shahzad ZHONGJIE QIN YAN LI DELIN XIA School of Pharmacy Taizhou Polytechnic CollegeTaizhou225300China Bone Tissue Engineering Research Center of Taizhou Taizhou225300China Department of Oral and Maxillofacial Surgery The Affiliated Stomatology Hospital of Southwest Medical UniversityLuzhou646000China Orofacial Reconstruction and Regeneration Laboratory The Affiliated Stomatology Hospital of Southwest Medical UniversityLuzhou646000China

Focal adhesions are polyproteins linked to extracellular matrix and cytoskeleton,which play an important role in the process of transforming force signals into intracellular chemical signals and subsequently triggering related physiological or pathological *** cytoskeleton is a network of protein fibers in the cytoplasm,which is composed of microfilaments,microtubules,intermediate filaments,and cross-linked *** is a very important structure for cells to maintain their basic *** review summarizes the process of fluid shear stress transduction mediated by focal adhesion and the key role of the cytoskeleton in this process,which focuses on the focal adhesion and cytoskeleton *** important proteins involved in signal transduction in focal adhesion are introduced *** relationship between focal adhesion and mechanical transduction pathways are *** this review,we discuss the relationship between fluid shear stress and associated diseases such as atherosclerosis,as well as its role in clinical research and drug development.

关键词： Cytoskeleton Endothelial cells Fluid shear stress Focal adhesion

Stem taper functions for Betula platyphylla in the Daxing’an Mountains,northeast China

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Journal of Forestry Research 2021年第2期32卷 529-541页

作者： Muhammad Khurram shahzad Amna Hussain Harold EBurkhart Fengri Li Lichun Jiang Key Laboratory of Sustainable Forest Ecosystem Management-Ministry of Education School of ForestryNortheast Forestry UniversityHarbin 150040People’s Republic of China Department of Forest Resources and Environmental Conservation(MC 0324) Virginia Tech310 West Campus DriveBlacksburgVA 24061USA

Accurate prediction of stem diameter is an important prerequisite of forest *** this study,an appropriate stem taper function was developed for upper stem diameter estimation of white birch(Betula platyphylla Sukaczev)in ten sub-regions of the Daxing’an Mountains,northeast *** commonly used taper functions were assessed using a diameter and height dataset comprising 1344 trees.A first-order continuous-time error structure accounted for the inherent *** segmented model of Max and Burkhart(For Sci 22:283–289,***://***/10.1093/fores tscie nce/22.3.283)and the variable exponent taper function of Kozak(For Chron 80:507–515,***://***/10.5558/tfc80507-4)described the data *** to its lower multicollinearity,the Max and Burkhart(1976)model is recommended for diameter estimation at specific heights along the stem for the ten *** comparison,the Max and Burkhart(1976)model was refitted using nonlinear mixed-effects ***-effects models would be used only when additional upper stem diameter measurements are available for *** in region-specific taper functions were indicated by the method of the non-linear extra sum of ***,the particular taper function should be adjusted accordingly for each sub-region in the Daxing’an Mountains.

关键词： White birch Taper function Multicollinearity Autocorrelation Nonlinear regression

Saline-Alkali Tolerance in Rice: Physiological Response, Molecular Mechanism, and QTL Identification and Application to Breeding

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Rice science 2022年第5期29卷 412-434页

作者： Ratan Kumar GANAPATI shahzad Amir NAVEED Sundus ZAFAR WANG Wensheng XU Jianlong Institute of Crop Sciences National Key Facility for Crop Gene Resources and Genetic ImprovementChinese Academy of Agricultural SciencesBeijing 100081China Shenzhen Branch Guangdong Laboratory for Lingnan Modern AgricultureAgricultural Genomics Institute at ShenzhenChinese Academy of Agricultural SciencesShenzhen 518120China

Salinity-alkalinity is incipient abiotic stress that impairs plant growth and ***(Oryza sativa)is a major food crop greatly affected by soil salinity and alkalinity,requiring tolerant varieties in the saline-alkali prone *** the molecular and physiological mechanisms of saline-alkali tolerance paves the base for improving saline-alkali tolerance in rice and leads to progress in *** review illustrated the physiological consequences,and molecular mechanisms especially signaling and function of regulating genes for saline-alkali tolerance in rice *** also discussed QTLs regarding saline-alkali tolerance accordingly and ways of deployment for *** efforts are needed to identify and utilize the identified QTLs for saline-alkali tolerance in rice.

关键词： saline-alkali tolerance physiological mechanism molecular mechanism marker-assisted backcrossing rice

Functional response of Chrysoperla carnea （Neuroptera： Chrysopidae） to Helicoverpa armigera （Lepidoptera： Noctuidae） Effect of prey and predator stages

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Insect Science 2011年第2期18卷 217-224页

作者： Mehdi Hassanpour Jafar Mohaghegh shahzad Iranipour Gadir Nouri-Ganbalani Annie Enkegaard Department of Plant Protection Faculty of Agriculture University of Mohaghegh Ardabili Ardabil Iranian Research Institute of Plant Protection (IRIPP) Tehran Department of Plant Protection Faculty of Agriculture University of Tabriz Tabriz Iran Department of Integrated Pest Management Research Centre Flakkebjerg Faculty of Agricultural Sciences Aarhus University Slagelse Denmark

Understanding predator-prey interactions has a pivotal role in biological control programs. This study evaluated the functional response of three larval instars of the green lacewing, Chrysoperla carnea （Stephens）, preying upon eggs and first instar larvae of the cotton bollworm, Helicoverpa armigera Hubner. The first and second instar larvae of C. carnea exhibited typeⅡ functional responses against both prey stages. However, the third instar larvae of C. carnea showed a type II functional response to the first instar larvae of H. armigera, but a typeⅢ functional response to the eggs. For the first instar larvae of C. carnea, the attack rate on H. armigera eggs was significantly higher than that on the larvae, whereas the attack rate of the second instar C. carnea on H. armigera larvae was significantly higher than that on the eggs. For the third instar larvae of C. carnea, the attack rate on the larvae was 1.015±0.278/h, and the attack coefficient on the eggs was 0.036 ±0.005. The handling times of the third instar larvae on larvae and eggs were 0.087 ± 0.009 and 0.071 ± 0.001 h, respectively. The highest predation rate was found for the third instar larvae of C. carnea on H. armigera eggs. Results of this study revealed that the larvae of C. carnea, especially the third instar, had a good predation potential in controlling H. armigera eggs and larvae. However, for a comprehensive estimation of the bio- control abilities of C. carnea toward H, armigera, further field-based studies are needed.

关键词： biological control Chrysoperla carnea Helicoverpa armigera predatorprey interactions