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蓄冷系统材料正癸醇——膨胀石墨复合相变材料的研究

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家电科技 2021年第3期3卷 15-16页

作者： Solaimalai Raja Rakkappan Suresh Sivan shaik naveed ahmed M Naarendharan P.Sai Sudhir 不详

空调系统是商业建筑中能耗最高的设备之一。在高峰时段,转移空调系统的部分负荷将有助于解决供电负载不平衡的问题。蓄冷系统(CTESS)是帮助空调系统在高峰时段转移建筑物制冷负荷的有效方法。蓄冷系统通常利用相变材料(PCM)作为能量存... 详细信息

空调系统是商业建筑中能耗最高的设备之一。在高峰时段,转移空调系统的部分负荷将有助于解决供电负载不平衡的问题。蓄冷系统(CTESS)是帮助空调系统在高峰时段转移建筑物制冷负荷的有效方法。蓄冷系统通常利用相变材料(PCM)作为能量存储介质。在蓄冷系统中,利用冰作为相变材料进行蓄冷,因为冰具有良好的热能存储特性。

关键词：空调系统制冷负荷存储介质蓄冷系统膨胀石墨负载不平衡部分负荷复合相变材料

Text Encryption Using Pell Sequence and Elliptic Curves with Provable Security

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Computers, Materials & Continua 2022年第6期71卷 4971-4988页

作者： Sumaira Azhar naveed ahmed Azam Umar Hayat Department of Mathematics Quaid-i-Azam UniversityIslamabad45320Pakistan Department of Applied Mathematics and Physics Graduate School of InformaticsKyoto UniversityKyoto606-8501Japan

The demand for data security schemes has increased with the significant advancement in the field of computation and communication *** propose a novel three-step text encryption scheme that has provable security against computation attacks such as key attack and statistical *** proposed scheme is based on the Pell sequence and elliptic curves,where at the first step the plain text is diffused to get a meaningless plain text by applying a cyclic shift on the symbol *** the second step,we hide the elements of the diffused plain text from the *** this purpose,we use the Pell sequence,a weight function,and a binary sequence to encode each element of the diffused plain text into real *** encoded diffused plain text is then confused by generating permutations over elliptic curves in the third *** show that the proposed scheme has provable security against key sensitivity attack and statistical ***,the proposed scheme is secure against key spacing attack,ciphertext only attack,and known-plaintext *** to some of the existing text encryption schemes,the proposed scheme is highly secure against modern cryptanalysis.

关键词： Text encryption pell numbers elliptic curves key sensitivity statistical cryptanalysis

National guidelines for the diagnosis and treatment of hilar cholangiocarcinoma

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World Journal of Gastroenterology 2024年第9期30卷 1018-1042页

作者： Faisal Saud Dar Zaigham Abbas Irfan ahmed Muhammad Atique Usman Iqbal Aujla Muhammad Azeemuddin Zeba Aziz Abu Bakar Hafeez Bhatti Tariq Ali Bangash Amna Subhan Butt Osama Tariq Butt Abdul Wahab Dogar Javed Iqbal Farooqi Faisal Hanif Jahanzaib Haider Siraj Haider Syed Mujahid Hassan Adnan Abdul Jabbar Aman Nawaz Khan Muhammad Shoaib Khan Muhammad Yasir Khan Amer Latif Nasir Hassan Luck Ahmad Karim Malik Kamran Rashid Sohail Rashid Mohammad Salih Abdullah Saeed Amjad Salamat Ghias-un-Nabi Tayyab Aasim Yusuf Haseeb Haider Zia Ammara naveed Department of Hepatopancreatic Biliary Surgery&Liver Transplant Pakistan Kidney and Liver Institute&Research CentreLahore 54000Pakistan Department of Hepatogastroenterology and Liver Transplantation Dr.Ziauddin University HospitalKarachi 75600SindhPakistan University of Aberdeen Aberdeen B243FXUnited Kingdom Department of Pathology Pakistan Kidney and Liver Institute&Research CentreLahore 54000Pakistan Department of Gastroenterology&Hepatology Pakistan Kidney and Liver Institute&Research CentreLahore 54000Pakistan Department of Radiology Aga Khan UniversityKarachi 74800Pakistan Department of Oncology Hameed Latif HospitalLahore 54000Pakistan Division of Hepatopancreatic Biliary Surgery&Liver Transplantation Shifa International HospitalIslamabad 44000Pakistan Department of Hepatopancreatic Biliary Surgery&Liver Transplant Shaikh Zayed Hospital and Post Graduate Medical InstituteLahore 54000Pakistan Department of Medicine Aga Khan University HospitalKarachi 74800Pakistan Department of Liver Transplant Pir Abdul Qadir Shah Jeelani Institute of Medical SciencesGambat 66020Pakistan Department of Medicine&Gastroenterology Lifecare Hospital and Research CentrePeshawar 25000Khyber PakhtunkhwaPakistan Department of Hepatopancreatobiliary&Liver Transplant Bahria International HospitalLahore 54000Pakistan Department of Surgery Hepatopancreatobiliary&Liver TransplantDow University of Health SciencesKarachi 74800Pakistan Department of Gastroenterology Hepatology&NutritionPir Abdul Qadir Shah Jeelani Institute of Medical SciencesGambat 66020Pakistan Department of Oncology Dr.Ziauddin HospitalKarachi 74800Pakistan Department of Radiology Rehman Medical InstitutePeshawar 25000Pakistan Army Liver Transplant Unit Pak Emirates Military HospitalRawalpindi 46000Pakistan Department of Gastroenterology Sindh Institute of Urology and TransplantationKarachi 75500Pakistan Rashid Nursing Home and Cancer Clinic Rashid Nursing Home and Cancer ClinicRawalpindi 46000Pakistan Department of Gastroentero

A consensus meeting of national experts from all major national hepatobiliary centres in the country was held on May 26,2023,at the Pakistan Kidney and Liver Institute&Research Centre(PKLI&RC)after initial consultations with the *** Pakistan Society for the Study of Liver Diseases(PSSLD)and PKLI&RC jointly organised this *** effort was based on a comprehensive literature review to establish national practice guidelines for hilar cholangiocarcinoma(hCCA).The consensus was that hCCA is a complex disease and requires a multidisciplinary team approach to best manage these *** coordinated effort can minimise delays and give patients a chance for curative treatment and effective *** diagnostic and staging workup includes high-quality computed tomography,magnetic resonance imaging,and magnetic resonance *** cytology or biopsy utilizing endoscopic retrograde cholangiopancreatography is a mainstay for ***,histopathologic confirmation is not always required before *** ultrasound with fine needle aspiration of regional lymph nodes and positron emission tomography scan are valuable adjuncts for *** only curative treatment is the surgical resection of the biliary tree based on the Bismuth-Corlette *** patients with unresectable hCCA can be considered for liver *** chemotherapy should be offered to patients with a high risk of *** use of preoperative biliary drainage and the need for portal vein embolisation should be based on local multidisciplinary *** with acute cholangitis can be drained with endoscopic or percutaneous biliary *** chemotherapy with cisplatin and gemcitabine has shown improved survival in patients with irresectable and recurrent hCCA.

关键词： Hilar cholangiocarcinoma Bismuth-Corlette classification Memorial Sloan Kettering Cancer Centre Staging Preoperative biliary drainage Portal vein embolisation Surgical resection Hepatectomy

Automatic Speaker Recognition Using Mel-Frequency Cepstral Coefficients Through Machine Learning

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Computers, Materials & Continua 2022年第6期71卷 5511-5521页

作者： U˘gur Ayvaz Hüseyin Gürüler Faheem Khan naveed ahmed Taegkeun Whangbo Abdusalomov Akmalbek Bobomirzaevich Department of Computer Engineering Istanbul Technical UniversityIstanbul34485Turkey Department of Information Systems Engineering Mugla Sitki Kocman UniversityMugla48000Turkey Artificial Intelligence Lab Department of Computer EngineeringGachon UniversitySeongnam13557Korea Department of Computer Science College of Computing and InformaticsUniversity of SharjahSharjah27272UAE

Automatic speaker recognition(ASR)systems are the field of Human-machine interaction and scientists have been using feature extraction and feature matching methods to analyze and synthesize these *** of the most commonly used methods for feature extraction is Mel Frequency Cepstral Coefficients(MFCCs).Recent researches show that MFCCs are successful in processing the voice signal with high *** represents a sequence of voice signal-specific *** experimental analysis is proposed to distinguish Turkish speakers by extracting the MFCCs from the speech *** the human perception of sound is not linear,after the filterbank step in theMFCC method,we converted the obtained log filterbanks into decibel(dB)features-based spectrograms without applying the Discrete Cosine Transform(DCT).A new dataset was created with converted spectrogram into a 2-D *** learning algorithms were implementedwith a 10-fold cross-validationmethod to detect the *** highest accuracy of 90.2%was achieved using Multi-layer Perceptron(MLP)with tanh activation *** most important output of this study is the inclusion of human voice as a new feature set.

关键词： Automatic speaker recognition human voice recognition spatial pattern recognition MFCCs spectrogram machine learning artificial intelligence

Efficient construction of a substitution box based on a Mordell elliptic curve over a finite field

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Frontiers of Information Technology & Electronic Engineering 2019年第10期20卷 1378-1389页

作者： naveed ahmed AZAM Umar HAYAT Ikram ULLAH Department of Applied Mathematics and Physics Graduate School of InformaticsKyoto UniversityKyoto 606-8501Japan Department of Mathematics Quaid-i-Azam UniversityIslamabad 44000Pakistan

Elliptic curve cryptography has been used in many security systems due to its small key size and high security compared with other cryptosystems. In many well-known security systems, a substitution box (S-box) is the only non-linear component. Recently, it has been shown that the security of a cryptosystem can be improved using dynamic S-boxes instead of a static S-box. This necessitates the construction of new secure S-boxes. We propose an efficient method to generate S-boxes that are based on a class of Mordell elliptic curves over prime fields and achieved by defining different total orders. The proposed scheme is devel-oped in such a way that for each input it outputs an S-box in linear time and constant space. Due to this property, our method takes less time and space than the existing S-box construction methods over elliptic curves. Computational results show that the pro-posed method is capable of generating cryptographically strong S-boxes with security comparable to some of the existing S-boxes constructed via different mathematical structures.

关键词： Substitution box Finite field Mordell elliptic curve Total order Computational complexity

Eukaryotic cell encystation and cancer cell dormancy:is a greater devil veiled in the details of a lesser evil?

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Cancer Biology & Medicine 2015年第1期12卷 64-67页

作者： Abdul Mannan Baig naveed ahmed Khan Farhat Abbas Department of Biological and Biomedical Sciences Aga Khan University

Cancer cell dormancy is the main cause of cancer recurrence and failure of therapy as dormant cells evade not only the anticancer drugs but also the host immune system. These dormant cells veil themselves from detection by imaging and/or using biomarkers, which imposes an additional problem in targeting such cells. A similar form of hibernation process known as encystation is studied in detail for pathogenic unicellular eukaryotic microorganisms. By examination using microarray gene expression profiles, immunocytochemistry tools, and si RNAs during the process of encystation, understanding the covert features of cancer cell dormancy as proposed could be possible. This knowledge can be extended to dormant cancer cells to uncover the mechanisms that underlie this ghost, yet dangerous state of human cancers. We propose a strategy to induce dormancy and exit this state by application of knowledge gained from the encystation induction and retrieval processes in pathogenic eukaryotic microorganisms. Given that early detection and characterization of dormant malignant tumor cells is important as a general strategy to monitor and prevent the development of overt metastatic disease, this homology may enable the design of therapies that could either awake the dormant cell from dormancy to make it available for therapies or prolong such a phase to make cancer appear as a chronic

关键词：休眠细胞真核细胞癌细胞隐藏免疫细胞化学恶性肿瘤细胞危险状态早期检测

Impacts of forestation on the annual and seasonal water balance of a tropical catchment under climate change

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Forest Ecosystems 2021年第4期8卷 856-871页

作者： Hero Marhaento Martijn J.Booij Noorhadi Rahardjo naveed ahmed Faculty of Forestry Universitas Gadjah MadaYogyakarta 55281Indonesia Water Engineering and Management Group Faculty of Engineering TechnologyUniversity of TwenteP.O.Box 2177500 AE Enschedethe Netherlands Faculty of Geography Universitas Gadjah MadaYogyakarta 55281Indonesia Key Laboratory of Mountain Surface Process and Ecological Regulations Institute of Mountain Hazards and EnvironmentChinese Academy of SciencesChengdu 610041China

Background:This study aims to assess the effects of a forestation program and climate change on the annual and seasonal water balance of the Bogowonto catchment(597 km^(2))in Java,*** catchment study is rare example in Indonesia where forestation has been applied at the catchment ***,since the forestation program has been initiated,evaluations of the program only focus on the planting area targets,while the environmental success e.g.,impacts on the hydrological processes have never been *** study used a calibrated Soil and Water Assessment Tool(SWAT)model to diagnose the isolated and combined effects of forestation and climate change on five water balance components,namely streamflow(Q),evapotranspiration(ET),surface runoff(Q_(s)),lateral flow(Q_(l))and base flow(Q_(b)).Results:The results show that from 2006 to 2019,forest cover has increased from 2.7% to 12.8% of the total area,while in the same period there was an increase in the mean annual and seasonal temperature,rainfall,and *** of SWAT simulations show that changes in the mean annual and seasonal water balance under the forestation only scenario were relatively minor,while changes were more pronounced under the climate change only *** on the combined impacts scenario,it was observed that the effects of a larger forest area on the water balance were smaller than the effects of climate ***:Although we found that forestation program has minor impacts compared to that of climate change on the hydrological processes in the Bogowonto catchment,seasonally,forestation activity has decreased the streamflow and surface runoff during the wet season which may reduce the risk of moderate ***,much attention should be paid to the way how forestation may result in severe drought events during the dry ***,we urge the importance of accounting for the positive and negative effects in future forestation programs.

关键词： Forestation Land use change Climate change SWAT model Water balance Bogowonto catchment

A conformable mathematical model for alcohol consumption in Spain

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International Journal of Biomathematics 2019年第5期12卷 203-219页

作者： Aqsa Nazir naveed ahmed Umar Khan Syed Tauseef Mohyud-Din Pepartment of Mathefnaticst Faculty of HITEC University Taxila CanttPakistan Department of Mathematics and Statistics Hazara University MansehruPakistan

A study on the conformable model of alcohol consumption in Spain has been *** the proposed model,the existence as well as the uniqueness of the solution has been discussed with the help of fixed-point *** analytical technique,Variational Iteration Method (VIM),has been used to obtain the solution to the governing system of differential *** the help of suitable plots,the role of fractional order derivative has been *** decreasing values of fractional order derivative,decrease in the number of non-consumers and non-risk consumers has been *** increasing the value of fractional order derivative,a sharp decrease can be seen in the compartment of *** agreement between the current study and the already existing studies,with ordinary derivatives,has also been pointed out.

关键词： Alcohol consumption nonlinear differential equations initial value problem conformable derivative uniqueness fixed-point postulate VIM

DETECTION OF ELECTROMAGNETIC INCLUSIONS USING TOPOLOGICAL SENSITIVITY

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Journal of Computational Mathematics 2017年第5期35卷 642-671页

作者： Abdul Wahab Tasawar Abbas naveed ahmed Qazi Muhammad Zaigham Zia Bio Imaging and Signal Processing Lab. Department of Bio and Brain Engineering Korea Advanced Institute of Science and Technology 305-701 Daejeon Korea Department of Mathematics and Statistics Faculty of Basic and Applied Sciences International Islamic University 44000 Islamabad Pakistan Weierstrass Institute for Applied Analysis and Stochastics Leibniz Institute in Forschungsverbund Berlin e. V. (WIAS) Mohrenstr. 39 10117 Berlin Germany Department of Mathematics COMSATS Institute of Information Technology Islamabad Campus Park Road Chak Shahzad 44000 Islamabad Pakistan

In this article, a topological sensitivity framework for far-field detection of a diamet- rically small electromagnetic inclusion is established. The cases of single and multiple measurements of the electric far-field scattering amplitude at a fixed frequency are tak- en into account. The performance of the algorithm is analyzed theoretically in terms of its resolution and sensitivity for locating an inclusion. The stability of the framework with respect to measurement and medium noises is discussed. Moreover, the quantitative results for signal-to-noise ratio are presented. A few numerical results are presented to illustrate the detection capabilities of the proposed framework with single and multiple measurements.

关键词： Electromagnetic imaging Topological derivative Localization Resolution analysis Stability analysis Medium noise Measurement noise.