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Low-complexity signal detection for massive MIMO systems via trace iterative method

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Journal of Systems Engineering and Electronics 2024年第3期35卷 549-557页

作者： IMRAN A.khoso ZHANG Xiaofei ABDUL Hayee Shaikh IHSAN A.khoso ZAHEER ahmed Dayo College of Electronic and Information Engineering Nanjing University of Aeronautics and AstronauticsNanjing 211106China School of Electrical Engineering Korea UniversitySeoul 02841Korea School of Mathematics South China University of TechnologyGuangzhou 510641China Department of Computer Science Huanggang Normal UniversityHuanggang 438000China

Linear minimum mean square error(MMSE)detection has been shown to achieve near-optimal performance for massive multiple-input multiple-output(MIMO)systems but inevitably involves complicated matrix inversion,which entails high *** avoid the exact matrix inversion,a considerable number of implicit and explicit approximate matrix inversion based detection methods is *** combining the advantages of both the explicit and the implicit matrix inversion,this paper introduces a new low-complexity signal detection ***,the relationship between implicit and explicit techniques is ***,an enhanced Newton iteration method is introduced to realize an approximate MMSE detection for massive MIMO uplink *** proposed improved Newton iteration significantly reduces the complexity of conventional Newton ***,its complexity is still high for higher ***,it is applied only for first two *** subsequent iterations,we propose a novel trace iterative method(TIM)based low-complexity algorithm,which has significantly lower complexity than higher Newton *** guarantees of the proposed detector are also *** simulations verify that the proposed detector exhibits significant performance enhancement over recently reported iterative detectors and achieves close-to-MMSE performance while retaining the low-complexity advantage for systems with hundreds of antennas.

关键词： signal detection low-complexity linear minimum mean square error(MMSE) massive multiple-input multiple-output(MIMO) trace iterative method(TIM)

Effect mechanism of nonane-1,1-bisphosphonic acid as an alternative collector in monazite flotation:Experimental and calculational studies

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Journal of Rare Earths 2022年第5期40卷 822-830,I0006页

作者： Zhao Cao Xu Wu Sultan ahmed khoso Wenbo Zhang Yuling Liu Mengjie Tian Jieliang Wang Institute of Mining Engineering Inner Mongolia University of Science and TechnologyBaotou 014010China School of Minerals Processing and Bioengineering Central South UniversityChangsha 410083China Key Laboratory of Hunan Province for Clean and Efficient Utilization of Strategic Calcium-containing Mineral Resources Central South UniversityChangsha 410083China Department of Mining Engineering Mehran University of Engineering&TechnologyJamshoro 76062Pakistan Powder Metallurgy Research Institute Central South UniversityChangsha 410083China Hubei Key Laboratory for Efficient Utilization and Agglomeration of Metallurgic Mineral Resources Wuhan 430081China

Monazite((Ce,La)PO_(4))is one of the major types of light rare earth minerals from which the light rare earth elements cerium(Ce)and lanthanum(La)are economically *** is extensively used to recover fine-grained *** oleate(NaOL)is considered as the collector with strong collecting ability for monazite ***,this study shows that its collecting ability is still *** this paper,a phosphonic acid,nonane-1,1-bisphosphonic acid(C9-BPA),was employed as the novel collector in place of *** experiments show that even when the C9-BPA dosage is less than one-fifth of the NaOL dosage,the monazite recove ry using C9-BPA as the collector is approximately 22 wt%higher than that using *** mechanism by which C9-BPA adsorbs on monazite was investigated using zeta potential,infrared(ir)spectroscopy and X-ray photoelectron spectroscopy(XPS)measurements as well as first-principles *** potential measurements show a more significant decrease in the zeta potentials of monazite after the addition of C9-BPA compared to those after the addition of *** C9-BPA-treated monazite,the characteristic peaks of C9-BPA are observed in the ir and C 1 s XPS spectrum,whereas for monazite treated by NaOL,no characteristic peak of NaOL was *** results show that C9-BPA has a stronger affinity towards the monazite surface than NaOL as confirmed by the higher adsorption energy of CP-BPA on the monazite surface(-204.22 kJ/mol)than NaOL(-48.48 kJ/mol).This study demonstrates an extensive application value and prospect of C9-BPA in monazite flotation and helps design novel collectors with strong collecting ability for monazite flotation.

关键词： Nonane-1,1-bisphosphonic acid(C9-BPA) Monazite Flotation First-principles calculation Rare earths

Histological Features of Parotid Gland of Albino Rats Exposed to. Smokeless Tobacco

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Journal of Northeast Agricultural University(English Edition) 2016年第3期23卷 54-60页

作者： Sana Murtaza khoso Pervez ahmed khoso Navaid Qazi Mir Hassan khoso ahmed Sultan Jatoi Ubedullah Kaka Dental College Isra University Hyderabad Sindh Pakistan College of Veterinary Medicine Northeast Agricultural University Harbin 150030 China Shaheed Benazir Bhutto University of Veterinary and Animal Sciences Sakrand Biopharmaceutical Lab College of Life Sciences Northeast Agricultural University Harbin 150030 China

Smokeless tobacco is very common personal habit of people living in various areas of Asia which is an alarming sign for the development of different oral diseases in such people. The aim of present study was to investigate effects of smokeless tobacco on parofid glands of the Aalbano rats by using various percentages of the smokeless tobacco. The rats were divided into three different groups, control group （A） no smokeless tobacco, experimental group （B） 5% smokeless tobacco and experimental group （C） 10% of smokeless tobacco with different feeds required according parameters. Weekly weight gain and partid gland were analyzed through student P test and histological structures were recorded through HE stain and Retculin stain. The results showed that as compared to control group body, weight of the rats was decreased in groups B and C having smokeless tobacco percentage in the diet. Weight of parotid gland as compared to control group was decreased in groups B and C with diet of smokeless tobacco. Further, histological observation under HE stain showed that parofid gland of group B showed mild narrowing of ductal lumen, collapse of vessels and stromal was also increased, in group C parenchyrnal tissues with loss of acini found damaged and glandular dystrop and lymphatic infiltration were determined moderate to severe. Meanwhile, reticulin stain showed that vascular collapses were shown because of increasing in stromal glandular atrophy in group C as compared to control group. In conclusion, this study showed that smokeless tobacco caused serious injuries in the tissue level in parotid gland with high percentage of smokeless tobacco which highlight health hazards on its consumption.

关键词： smokeless tobacco histological observation parotid gland Albino rat

Effect of Mineral and Vitamin Supplementation on Performance and Haemotological Values in Broilers

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Journal of Northeast Agricultural University(English Edition) 2018年第1期25卷 33-39页

作者： Pervez ahmed khoso Aziz ahmed Memon Ali Asghar Baloch Ali Raza Mangi Zafar Ali khoso Department of Veterinary Medicine Shaheed Benazir Bhutto University of Veterinary and Animal Sciences Sakrand Department of Poultry Husbandry Sindh Agricultural University Department of Veterinary Pathology Shaheed Benazir Bhutto University of Veterinary and Animal Sciences Sakrand Department of Veterinary Anatomy and Histology Shaheed Benazir Bhutto University of Veterinary and Animal Sciences Sakrand Department of Animal Breeding Shaheed Benazir Bhutto University of Veterinary and Animal Sciences Sakrand

A total of 120-day-old broilers were divided into four groups. In group-A, broilers were left without supplementation of minerals and vitamins(control), while the broilers in groups B, C and D were given mineral and vitamin supplementation 1-6, 1-4 and 5-6 weeks, respectively. The results showed that the feed consumption of broilers in groups A, B, C and D was 4 234.61, 4 028.38, 4 169.32 and 4 181.87 g · b-1; water intake was 9 668.88, 9 295.55, 9 882.11 and 9 402.86 L · b-1; live body weight was 2 068.90, 2 360.90, 2 255.30 and 2 157.40 g · b-1, respectively. The feed conversion ratio of broilers in groups A, B, C, D was 2.05, 1.71, 1.85 and 1.94 g · b-1, carcass weight(wt) was 1 550, 1 656, 1 552 and 1 528.8 g · b-1, and average dressing percentage was 61.24, 63.02, 62.60 and 60.51 respectively. Weight of heart in groups A, B, C and D was 15.13, 13.16, 11.72 and 11.50 g · b-1, weight of gizzard was 32.98, 37.48, 37.62 and 33.35 g · b-1, weight of liver was 51.94, 48.70, 51.94 and 48.70 g · b-1 and spleen weight was 3.48, 3.28, 3.06 and 2.82 g · b-1, respectively. Average mortality of broilers in groups A, B, C and D was 6, 2, 4 and 5 resulting 20.00%, 8.00%, 13.00% and 16.00% mortality rate, respectively. The haemoglobin level in blood of broilers in groups A, B, C and D was 9.20, 12.23, 10.87 and 7.60 g · dL-1,white blood cell level 77.47, 89.83, 81.63 and 78.13(×106 μL); red blood cell level 1.85, 2.58, 2.45 and 1.40(×106 μL), respectively. It was concluded that broilers given mineral and vitamin supplementation(Aquavit Electrolyte) for 6 weeks were proven to be most effective regime to result the lowest feed intake, the highest live body weight, better feed conversion ratio, higher carcass weight, better dressing percentage, higher net profit, relatively improved haemoglobin level in blood, increased counts of red blood cells and white blood cells. In all the above parameters, the broilers received mineral and vitamin supplementation for the first 4 weeks and

关键词： mineral vitamin performance haemotology broiler

囊泡运输和细胞骨架在植物发育和环境适应中的协同作用

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植物生理学报 2022年第6期58卷 989-1022页

作者：寇晓月 khoso Muneer ahmed 宋扬李立新东北林业大学生命科学学院东北盐碱植被恢复与重建教育部重点实验室哈尔滨150040

微管和微丝构成的植物细胞骨架对于植物发育和响应环境刺激至关重要。细胞骨架是高度动态且严格调控的网络,为胞内和胞间的交流与生理活动提供微环境。植物内膜系统由内质网、高尔基体、内体、液泡等膜封闭的细胞器组成。这些细胞器相... 详细信息

微管和微丝构成的植物细胞骨架对于植物发育和响应环境刺激至关重要。细胞骨架是高度动态且严格调控的网络,为胞内和胞间的交流与生理活动提供微环境。植物内膜系统由内质网、高尔基体、内体、液泡等膜封闭的细胞器组成。这些细胞器相互联系,完成囊泡运输、增殖、免疫、胁迫应答等细胞活动。内质网是蛋白质合成的平台和分泌途径起始位点。内质网形态和功能的维持主要依赖微丝骨架。真核生物普遍具有内质网-质膜接触位点(EPCS),其功能与内膜动力学、细胞骨架排列以及胞间信号转导密切相关。EPCS还是响应环境刺激的信号平台。由皮层微管和皮层微丝构成的皮层细胞骨架与质膜、细胞壁、植物激素协同作用,调控植物细胞分裂、形态建成和防御。细胞结构与信号之间的相互作用受多种因素以及信号通路的严格调控。简言之,内膜系统与细胞骨架网络协同调控植物发育及其响应并适应环境刺激。本文综述了植物细胞骨架网络和内膜系统在植物发育和防御中的协同作用。

关键词：膜泡运输细胞骨架网络内质网-质膜接触位点细胞壁动力学生长素运输防御成膜体扩张细胞板

Xanthate interaction and flotation separation of H2O2-treated chalcopyrite and pyrite

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Transactions of Nonferrous Metals Society of China 2019年第12期29卷 2604-2614页

作者： Sultan ahmed khoso Yue-hua HU Fei LÜ Ya GAO Run-qing LIU Wei SUN School of Minerals Processing and Bioengineering Central South UniversityChangsha 410083China Key Laboratory of Hunan Province for Clean and Efficient Utilization of Strategic Calcium Containing Minerals Resources Central South UniversityChangsha 410083China

This study investigated the effects of H2O2 treatment on xanthate interaction and flotation separation of chalcopyrite and pyrite by making use of a series of laboratory flotation experiments and surface analysis *** test results showed that H2O2 treatment influenced the flotation behaviors of the two minerals;however,flotation of pyrite was depressed more significantly than that of the *** well-controlled H2O2 concentration,the selective separation of chalcopyrite from pyrite was realized at pH 9.0,at which the recovery of chalcopyrite was over 84%and that of pyrite was less than 24%.Zeta potential,UV-visible and ir spectrum measurements revealed that the collector interacted differently with the two minerals after H2O2 treatment,and the surface of chalcopyrite adsorbed much greater amount of xanthate than that of the *** and XPS analyses showed that the H2O2 treatment significantly changed the surface properties of pyrite to very hydrophilic species that inhibited the adsorption of collector and thus depressed the floatability of ***,the surface of chalcopyrite remained mildly inert to H2O2,as a result,the adsorption of xanthate and its oxidation to dixanthogen were very effective,which enhanced the flotation of chalcopyrite.

关键词： H2O2 treatment selective separation xanthate interaction chalcopyrite pyrite

Promotion of conversion activity of flue gas desulfurization gypsum into α-hemihydrate gypsum by calcination-hydration treatment

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Journal of Central South University 2019年第12期26卷 3213-3224页

作者： GUAN Qing-jun SUN Wei GUAN Chang-ping YU Wei-jian ZHU Xiang-nan Sultan ahmed khoso WANG Ping PENG Wen-qing School of Resource Environment and Safety Engineering Hunan University of Science and TechnologyXiangtan 411201China School of Mineral Processing and Bioengineering Central South UniversityChangsha 410083China College of Chemical and Environmental Engineering Shandong University of Science and TechnologyQingdao 266590China

The massive accumulation of flue gas desulfurization(FGD)gypsum produced in the wet limestone-gypsum flue gas desulfurization process not only encroaches on lands but also causes serious environmental *** preparation ofα-hemihydrate gypsum(α-HH)is an important way to achieve high-value utilization of FGD *** the glycerol-water solution approach can be used to produceα-HH from FGD gypsum under mild conditions,the transition is kinetically unfavorable in the mixed ***,an easy pretreatment was used to activate FGD gypsum by calcination and hydration to readily complete the *** pretreatment deteriorated the crystallinity of FGD gypsum and caused it to form small irregular flaky crystals,which dramatically increased the specific surface ***,most of the organics adsorbed onto FGD gypsum surfaces were removed after *** poor crystallinity,increased specific surface area,and elimination of organics adsorbed onto crystal surfaces effectively improved the conversion activity of FGD gypsum,thereby promoting dihydrate gypsum(DH)dissolution andα-HH ***,the phase transition of FGD gypsum toα-HH is facilitated.

关键词： flue gas desulfurization gypsum α-hemihydrate gypsum calcination-hydration treatment dissolution surface characteristics

Flocculation of flotation tailings in presence of silicate gel and polymer

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Journal of Central South University 2018年第8期25卷 1928-1937页

作者： YIN Zhi-gang Sultan ahmed khoso SUN Wei HU Yue-hua ZHAI Ji-hua GAO Yue-sheng ZHANG Chen-hu LIU Run-qing School of Minerals Processing and Bioengineering Central South UniversityChangsha 410083China Sichuan Non-ferrous Technology Group Co. LtdChengdu 610037China Department of Mining Engineering Mehran University of Engineering&TechnologyJamshoro 76062Pakistan

Flotation tailings were successfully flocculated in the presence of cationic polyacrylamide and silica *** effects of various parameters such as polymer weight,charge density,and pH on the rate of flocculation were also investigated in the current *** flocculation mechanism of the flocculant on tailings was investigated using zeta potential and Fourier transform infrared(FTir)*** results obtained reveal that 1)sodium silicate gel,used as a binder for the consolidation of tailings form primary flocs,acts as an anchor and the adsorption of polymer flocculant on these anchors results in the formation of larger flocs and,consequently,enhanced settling rate;2)flocculation in the presence of silica gel and polymer has a faster settling rate than single-polymer flocculation owing to the mechanisms of charge neutralization and bridging as identified using zeta potential and FTir measurements.A pilot level study was conducted to investigate the influence of processed water on the flotation of *** results show that the proposed tailing disposal method could improve scheelite recovery by 2%(approximately)and could reduce the daily operation costs of the plant by approximately 108.57 USD.

关键词： silica gel polymer flocculation tailings disposal

Selective flotation of smithsonite from dolomite by using novel mixed collector system

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Transactions of Nonferrous Metals Society of China 2019年第5期29卷 1082-1089页

作者： Li WANG Guang-yan HU Wei SUN Sultanahmed khoso Run-qing LIU Xiang-feng ZHANG School of Minerals Processing and Bioengineering Central South UniversityChangsha 410083China Key Laboratory of Hunan Province for Clean and Efficient Utilization of Strategic Calcium-containing Mineral Resources Central South UniversityChangsha 410083China

A novel mixed collector (BHOA) was prepared by mixing benzohydroxamic acid (BHA) and sodium oleate (NaOL) and applied to the flotation separation of smithsonite from dolomite. Flotation results showed that NaOL alone had good collecting performance on smithsonite and common gangue mineral dolomite but had poor selectivity. By using a BHA/NaOL mixed system with a molar ratio of 2:1, the recoveries of smithsonite and dolomite reached approximately 90% and 5%, respectively. Surface tension analysis showed that the surface activity of BHOA was a little higher than that of a single NaOL because of synergistic effects. Zeta potential and X-ray photoelectron spectroscopy measurements indicated that surfactants BHA and NaOL co-absorbed on the smithsonite surface and only NaOL was present on the dolomite surface in the presence of BHOA.

关键词： flotation smithsonite dolomite sodium oleate benzohydroxamic acid sulfuration