Preliminary Palynostratigraphic Data on the Middle Albian-Lower Cenomanian of the Tarfaya Basin, Southwest Morocco

The Tarfaya-Laayoune-Boujdour basin is of great interest to oil exploration;on this aspect, there has been exploration by the Moroccan National Office of Hydrocarbons and Mining, which has shown indices of oil and/or gas recorded in most wells drilled in the Moroccan Atlantic margin. FD-1 well, object of this study, is one of these wells located in the offshore Tarfaya-Laayoune-Boujdour basin. A palynological examination of the processed samples revealed the existence of organic palynomorphs, well conserved and rich in dinoflagellate cysts. The latter are composed of worldwide marker taxa of high stratigraphic resolutions. Thus, the middle upper Albian (3408 - 3408.5 m) is determined by the presence of Cribroperidinium tensiftense, Tehamadinium coummia, Spiniferella cornuta, Chichaouadinium vestitum, Dinopterygium alatum and Litosphaeridium arundum. The upper Albian (3406.5 - 3408 m) is characterized by the FOs of marker taxa: Cyclonephelium chabaca, Cribroperidinium auctificum and Chichaouadinium vestitum. Lastly, the upper Albian-lower Cenomanian transition is defined between 3404 m and 3406.50 m, as suggested by the FOs of Chichaouadinium boydii, Dinopterygium tuberculatum, Sepispinula ancorifera, Litosphaeridium conispinum, Prolixosphaeridium conulum and Xenascus ceratioides.

Gin+GORM通用MIS系统设计

文章旨在介绍一种基于Go语言中的Gin和GORM框架开发的通用管理信息系统(Management Information System,MIS)的设计与实现。MIS系统在各种组织中发挥着关键作用,用于处理、管理和分析各种信息,通过Gin和GORM这两个流行的开源框架,可以快速搭建一个稳定、高效的MIS系统,以满足企业管理信息系统的需求,并提供友好的用户界面和可靠的数据管理。该方案可针对不同的业务需求进行快速定制和扩展功能,具有高度可扩展性和灵活性。

术前体位复位联合术中提拉复位辅助Mis-TLIF技术治疗峡部裂型腰椎滑脱

目的:探讨应用微创经椎间孔腰椎椎间融合术(minimally invasive transforaminal lumbar interbody fusion,Mis-TLIF)结合术前体位复位治疗峡部裂型腰椎滑脱的临床效果并总结其优点。方法:回顾性分析2016年7月至2022年7月收治的60例腰椎峡部裂型滑脱患者,其中男26例,女34例;年龄35~72(51.32±4.24)岁。依据手术方式分为观察组和对照组。观察组30例,男12例,女18例;年龄35~71(51.80±6.38)岁;病程12~60(24.17±1.98)个月;L4滑脱18例,L5滑脱12例;Meyerding分级Ⅰ度滑脱20例,Ⅱ度滑脱10例;采用术前体位复位联合术中撑开复位后经Quadrant通道Mis-TLIF。对照组30例,男14例,女16例;年龄36~72(50.00±4.24)岁;病程12~60(23.70±1.53)个月;L4滑脱16例,L5滑脱14例;Meyerding分级Ⅰ度滑脱19例,Ⅱ度滑脱11例;采用传统后路开放椎体融合术治疗。分析两组的手术时间、术中及术后出血量、术后住院时间、放射线暴露时间和并发症等方面的差异。采用视觉模拟评分(visual analogue scale,VAS)、Oswestry功能障碍指数(Oswestry disability index,ODI)及日本骨科协会(Japanese Orthopaedic Association,JOA)评分(腰椎评分标准)评估临床效果,随访复查X线及CT评估椎间融合情况。结果:所有患者获得12个月的随访。两组在手术时间、腰痛VAS、滑脱角、滑脱率等方面差异无统计学意义(P>0.05)。观察组术中术后出血量(165.50±15.56)、(59.17±10.59)ml,均少于对照组(259.33±35.32)、(165.33±29.56)ml(P<0.05);观察组住院时间(3.53±0.68)d,少于对照组(5.20±0.41)d(P<0.05);末次随访时两组椎间隙高度、滑脱角、滑脱率、ODI、VAS、JOA评分均较术前明显改善(P<0.05)。末次随访观察组与对照组ODI[(9.93±1.11)%vs(10.93±1.11)%]和JOA[(26.07±1.01)分vs(25.43±1.25)分]比较,差异有统计学意义(P<0.05)。结论:在峡部裂型腰椎滑脱的治疗中,术前体位复位联合术中提拉复位辅助Mis-Tlif技术相比传统开放性手术具有创伤小、出血少、住院周期短等优点,是一种安全有效的技术。

HFACS-MI改进模型在危险化学品仓储事故人因分析中的应用

为了研究危险化学品仓储事故的关键人因,通过人因分析与分类系统-煤矿(Human Factors Analysis and Classification System-Mine,HFACS-MI)改进模型从员工的不安全行为、影响不安全行为的前提条件、监督行为、组织影响和企业外部因素5个层次系统地分析65起危险化学品仓储事故,并运用卡方检验和让步比分析了产生不安全行为的原因和各层次间的内在关系。结果表明,外部管理、组织过程、监督不充分、个人因素、技能差错和违规是导致危险化学品仓储事故发生的重要因素。HFACS-MI改进模型上下层级的人为因素间存在显著的因果关系,且主要的危险化学品仓储事故致因路径共有5条,其中“外部管理因素—组织过程漏洞—监督不充分—个人因素—违规”是最关键的致因路径。改进的HFACS-MI模型可以有效分析危险化学品仓储事故人因因素。

无线紫外光MIMO通信系统信道容量估算方法

无线紫外光通信系统易受大气散射等因素的影响,导致通信信道容量估算准确率较低。为此,提出一种无线紫外光多入多出(Multiple-Input Multiple-Output, MIMO)通信系统信道容量估算方法。根据信道特征,构建无线紫外光MIMO通信系统的信道容量估计模型,获取无线紫外光的单次散射传输特性,利用符号补码式的方法改进空时编码,设定高级检测器中符号的接收能耗,使每个符号保持在标准功率数值范围内,完成通信系统信道检测式编码。根据不同发射角和接收角计算无线紫外光通信的路径损耗比,通过泊松随机分布获得最终通信系统信道容量的估算结果。实验结果表明,所提方法的传输速率可高达8 Mbps,误码率始终低于10-3bit/s,估算准确率在90%以上,估计时间低于4 ms,估算效果好,可为通信行业发展提供理论依据。

Effect of the Number and Orientation of Fractures on the P-Wave Velocity Diminution: Application on the Building Stones of the Rabat Area (Morocco)

This study is focused on two types of Moroccan rocks, among the most widely used as building stones: the calcarenite of Salé (CS) and the marble of oued Akrech (MA). The two rocks, lithologically different, show a clear contrast of their P-wave velocities (Vp): 3.90 vs 5.10 km/s at dry state and 4.29 vs 5.64 km/s at saturation. The “Artificial fractures” created in the two rock types reveal that their Vp undergo diminutions which the rates vary depending of the number and the plane orientation of the fractures. In the CS, Vp shows an increasing of cumulative diminution (Dc) according to the number of fractures, but with a variable rate of unitary diminution (Du) from one fracture to the other. This defines a linear regression with a low coefficient of determination (Dc = 10.18NbFr + 10.96;r2 = 0.87). The mode of the Vp evolution would be related to the roughness of fractures surface, which itself depends upon the petrographic nature of the calcarenite (friable structure, high porosity and heterogenous composition). The MA manifested an increasing Dc with a fairly constant rate of Du from a fracture to another, giving a regression line with a high coefficient of determination (Dc = 12.17NbFr – 10.69;r2 = 0.99). This steady diminution of Vp would be related to the granoblastic texture and the monomineral composition of the marble, which engender smoother fracture surfaces. The rates of Vp diminution also depend on the orientation plane of the fractures relative to the direction of wave propagation. The fractures parallel (θ = 0°) amplify slightly the Vp, playing a significant role of “waveguide”. The fractures oriented at 45° lead to a diminution lower than those of fractures oriented at 25° and 90°. The same trend of diminution, but at variable rates, appears on the samples of the two types of stones at dry and saturated state. This can be explained by the compressive nature of P-waves, which obey the physic laws of the transmission of the constraints in the solid mediums.

STEMI患者外周血单个核细胞中MAPK通路与炎症反应及PCI后无复流的关系

目的 研究ST段抬高型心肌梗死(STEMI)患者外周血单个核细胞(PBMCs)中丝裂原活化蛋白激酶(MAPK)通路与炎症反应及经皮冠状动脉介入术(PCI)后无复流的关系。方法 选取郑州市第七人民医院2021年2月至2022年10月进行PCI治疗的STEMI患者和同期进行体检的健康志愿者,分别作为STEMI组(n=92)和对照组(n=100)。采用荧光定量PCR法检测PBMCs中p38MAPK、JNK的表达水平,根据中位数将STEMI组患者分为p38MAPK、JNK高表达和低表达。检测STEMI患者血清ICAM-1、TNF-α、IL-6含量,评估STEMI患者心肌损伤程度及无复流情况。结果 STEMI组患者PBMCs中p38MAPK、JNK的表达水平高于对照组,差异有统计学意义(t=5.386、5.126,P<0.05);STEMI组中p38MAPK、JNK高表达患者的CK-MB峰值、cTnT峰值及ICAM-1、TNF-α、IL-6含量均高于p38MAPK、JNK低表达患者,差异有统计学意义(t=7.143、4.999、9.528、6.805、6.890、6.226、8.132、7.807、7.162、7.588,P<0.05);STEMI组中无复流患者PBMCs中p38MAPK、JNK的表达水平高于血流正常患者,差异有统计学意义(t=5.208、4.240,P<0.05);经ROC曲线分析,PBMCs中p38MAPK、JNK的表达水平对STEMI患者PCI后无复流具有预测价值(P<0.05)。结论 STEMI患者MAPK通路中p38MAPK、JNK的高表达与炎症反应激活、PCI后无复流有关。

Potentiality of Clay Raw Materials from Northern Morocco in Ceramic Industry: Tetouan and Meknes Areas

This study aims at evaluating the potential suitability of Tetouan and Meknes (central Morocco) clay material as raw materials in various ceramic applications by investigating their textural, chemical, thermal and firing characteristics. Textural properties were identified by specific surface area, cation exchange capacity (CEC) and bulk density (ρs). Chemical and thermal properties were assessed using XRF and TG/DTA techniques, respectively. Firing characteristics at temperatures from 800℃ to 1100℃ were determined by linear firing shrinkage, loss on weight and water absorption capacity. The Meknes clays are characterised by medium cation exchange capacity (CEC) and specific surface area (SSA) values due to their moderate smectite content. The Tetouan clays have medium to low CEC and medium SSA values. The main oxides in the clayey samples are SiO2 (35 - 54.3 wt%), Al2O3 (20.6 - 43.9 wt%), and Fe2O3 (9.7 - 22.4 wt%). The amount of CaO in Meknes clays ranges from 8 to 12 wt%, whereas CaO is only present in some Tetouan clay (TE4, TE7, TN4 and TN5). A significant densification of ceramic behaviour could be noticed for most of Tetouan clays at firing temperatures above 1000℃. Meknes clays show earlier densification from 800℃. The chemical, textural and ceramic properties of Tetouan and Meknes clays indicate their suitability as raw materials for the production of structural ceramics. The high amount of Fe2O3 in all clays makes them inappropriate in fine ceramics.

Plio-Quaternary Volcanism in Northeastern Morocco: Petrography and Geochemistry of Outcrops with High Geothermal Potential

Cenozoic volcanic activity in Morocco started in the Miocene and proceeded, after a short break, during Pliocene and Quaternary. Calc-alkaline magmatic activity occurred first and was accompanied by the eruption of transitional lavas, followed by Plio-Quaternary alkali basaltic activity, which was emplaced within Neogene sedimentary basins of the Rif belt and its foreland. From calc-alkaline to alkaline magmatism, passing through a transitional term, volcanic activities in Morocco formed magnificent outcrops, very diversified in their affinities, their mineral compositions and their geochemistry. The petrographic study and geochemistry of Plio-quaternary volcanic rocks in the areas with high geothermal potential in northeast of Morocco show a dominance of Na-rich basaltic rocks (basanites, basalts, tephrites and basaltic trachy-andesites), followed by trachy-andesites. Most of the samples exhibit an enrichment of large-ion lithophile elements (LILEs) over high-field-strength elements (HFSEs). These results were used to test the global model of Circum-Mediterranean Anorogenic Cenozoic Igneous Province (CiMACI) and the regional model of [1].

基于多重生物信息学数据库分析Mis18β在膀胱癌组织中的表达及其临床意义

目的:探讨Mis18β基因在膀胱癌组织中的表达、临床意义及在疾病过程中的作用。方法:通过癌症基因组图谱(The Cancer Genome Atlas, TCGA)数据库获得膀胱癌患者Mis18β mRNA测序数据及临床资料数据,通过基因表达综合(Gene Expression Omnibus, GEO)数据库获得膀胱癌Mis18β表达数据,分析Mis18β在膀胱癌组织和癌旁组织中mRNA表达差异及与患者临床病理参数的相关性并进行生存分析,利用基因本体论(Gene Ontology, GO)功能分析以及京都基因与基因组百科全书(Kyoto Encyclopedia of Gene and Genomes, KEGG)通路富集分析探索Mis18β在膀胱癌发生发展中可能的信号通路。收集膀胱癌患者及健康对照者外周血标本,RT-PCR方法验证Mis18β mRNA表达水平的差异。结果:TCGA数据库和GEO数据库分析显示膀胱癌组Mis18β的表达量明显高于对照组(P<0.05)。生存分析提示Mis18β高表达组膀胱癌患者的总生存期明显低于低表达组(P<0.05)。功能富集分析显示Mis18β主要参与细胞有丝分裂,调控细胞周期及DNA复制等过程。膀胱癌患者外周血有核细胞中Mis18β的含量明显高于对照组(P<0.05)。结论:Mis18β在膀胱癌中呈高表达,其表达水平与患者年龄、病理类型、总生存期等临床病理特征存在相关性,为揭示膀胱癌发生发展的分子机制及寻找新的诊断、预后标志物提供了理论基础。

Isolation and Identification of Mannheimia haemolytica and Pasteurella multocida Species from Ruminants in Six Different Regions in Morocco

Pasteurella species is considered the principal pathogen of the respiratory tract.Mannheimia haemolytica and Pasteurella multocida were investigated and typed from nasal swabs and tissues taken from sheep,goat and cattle.Indeed,41 lung and 121 nasal swabs samples were collected from animals with respiratory diseases during 2015 to 2017 in six different regions in Morocco.At first,a screening of Pasteurella species using the real time PCR(RT-PCR)was carried out,then all isolated strains on agar blood were confirmed by PCR gel based assay specific for M.haemolytica and P.multocida.Pathogenicity was evaluated in mice and histopathological examination was done on some of lung tissue.The results revealed that 34 samples of which 28(55%)from nasal swabs and six(38%)from lungs were positive for M.haemolytica and nine samples of which seven(14%)from nasal swabs and two(13%)from lungs were positive on P.multocida serogroup A.Seventy-two percent(72%)isolates were highly pathogenic to mice,which is in accordance with the results obtained by histopathology examination.This is the first report for widespread infections of Pasteurella(M.haemolytica&P.multocida)in ruminants in Morocco.Therefore,measures including development of vaccines are highly required to mitigate the impact of the bacteria in animals.

Chemical composition and larvicidal activity of essential oil of Origanum majorana(Lamiaceae) cultivated in Morocco against Culex pipiens(Diptera:Culicidae)

Objective:To evaluate the larvicidal activity of essential oil of Origanum mtijoruna(Lamiaceae)cultivated in Morocco against Culex pipiens(Diptera:Culicidae).Methods:The analysis and the identification of the various constituents of essential oil were carried out by gas chromatography coupled with mass spectrometry.Biological test was performed according to a standard methodology inspired by the World Health Organization protocol with slight modification.Results:This oil mainly consisted of monoterpene and sesquiterpenes.The majority compounds are 4-terpinene(28.96%),y-terpinene(18.57%),α-terpinene(12.72%) and sabinene(8.02%).The lethal concentrations(LC_(50) and LC_(90)) measured for the essential oil Origanum majorana,were respectively of the order of 258.71 mg/L and 580.49 mg/L.Conclusions:The results could be useful in search for newer,safer,and more effective natural larvicidal agents.

Cervix and breast cancers in Oujda city in Eastern Morocco: Determinants and risk factors

A retrospective study was conducted in 2008 on 681 in Eastern Morocco in order to estimate the incidence of cervical and breast cancer, and to determine the social determinants and risk factors associated with these two types of cancer. Another goal of the study was to give health decision makers evidence of the necessity for early diagnosis and treatment. A questionnaire was used before the clinical gynecological examination and sampling cell for the Pap smear. Any woman with a Pap smear suspect had to do a biopsy at the reference centre. Physicians, obstetricians and midwives in the consultation process did gynecological examination and breast palpation. Patients with a suspicious nodule underwent ultrasound and mammography by radiologists on site. Gynecological samples were carried out systematically to all ever-married women to detect cancer of the cervix. Software Excel and SPSS 17 were used for data processing. Patients with high social status were more susceptible to develop breast cancer whereas women with cervical cancer were poor, belonging to a class with a low marital status of widowed or divorced having been married at an early age. The majority of women were married (81%), poor (80%) and illiterate (66%). Breastfeeding women were less affected by breast cancer than women not breastfeeding. For cervical cancer, the difference was not statistically significant. Women using contraceptives were vulnerable to both breast and cervical cancer. For cervical cancer, over 15% of women with a family history were screened positive. No relationship was found between breast cancer and family history. Taking into account regional particularities, we stress the importance of social determinants and risk factors and show that our results are consistent with those published by other researchers. Breast and cervical cancers constitute a real challenge in Morocco. Their socioeconomic burden can be reduced by early detection and treatment. The delayed diagnosis complicates the task both in terms of survival and cost of treatment. Consequently, Moroccan health authorities are urged to adopt preventive and cost effective strategies.

Epidemiological Approach to the Use of Psychotropic Medications at Moulay El Hassan Hospital, in the Gharb Region of Morocco

The use of psychotropic drugs is important in Morocco related to the large amount of sufferers by psychiatric disorders, according to a survey of the Moroccan Ministry of Health (2010). A prevalence of 26.5% of depressive disorders, and 9% for generalized anxiety disorder, and 5.6% of psychotic disorders was recorded within population, hence the importance to describe the use and assess the prevalence of psychotropic and socio-economic factors was associated with their use. Our research is a retrospective study, carried out between February 2010-December 2013, holding a sample of 5618 patients aged between 1 and 90 years old. The study is concerned with drawing social and clinical data from patients’ records. The different classes of psychotropic drugs prescribed to patients in the psychiatric department Moulay El Hassan Hospital, vary between antidepressants (36%), antipsychotics (32%), anxiolytics (10%), anti-epileptics (9%), the class of diverse “sulpiride” (7%), anti-parkinsonian (6%), and hypnotics were prescribed in rare cases. The relationship between socio-economic factors and the take of a psychotropic treatment was very strong in Morocco. In contrast, the patients support showed by close families and the health care staff remain a challenge for Moroccan population.

Geochemical Siliceous and Silicified Facies of Phosphate Series of Ouled Abdoun Basin (Morocco)

Syn-sedimentary post-diagenetic phenomena are remarkable in Moroccan phosphates. Indeed they are reference deposits for geological study, where important interests are given of determination and identification of these geochemical phenomena. Silicification is one of the phenomena that we have studied to determine the diagenetic processes that control the new-formation of silica in phosphate series of Ouled Abdoun. This study was performed on deposit EL Halassa, which belongs to the Ouled Abdoun Basin;they spread out the Maastrichtian to Lutetian. At first, petrographic approach was applied on different terms composing the phosphate series. In a second step, a geochemical approach on the same silica and silicified facies of phosphate series Ouled Abdoun Basin for characterizing silicification deduced the probable links between this diagenetic phenomenon and facies and forms’ affect. Ten major trace elements were measured. According to the phases’ petrographic relationship, the results were presented and discussed: silicate phase, the carbonate phase and clay phase.

Hydrothermal Alterations in Irbiben Gold Deposit (Tagragra Akka, Western Anti-Atlas, Morocco): Petrographic and Geochemical Characterization

Irbiben is a small gold deposit of the Precambrian inlier Tagragra d’Akka located in the Moroccan western Anti-Atlas, approximately 160 km southeast from Tiznit. Petrographic study shows that host rocks of Irbiben deposit are green schist facies metamorphic rocks, like metamorphic sandstone and schist, meta-pelite and quartzite. Gold is located in quartz veins or host rock with frequent injections of quartz. The petrographic characterization of alteration through the description of the alteration profiles and the comparative study of protolith and altered rocks showed a development of dominant quartz and calcite in mineralization wall-rocks. In moving away from it, there is rather sericite and chlorite. These phenomena are materialized respectively by the development of SiO2 and CaO in the wall-rocks but rather that ferromagnesian elements (FeO, MgO) and K2O away from the mineralization. These trends were demonstrated by the geochemical study through Harker diagrams, description of alteration profiles, comparative study of protolith and altered rocks, and use of a new alteration index, MIA, elaborated during this work.

Comparing and Evaluating Probabilistic and Deterministic Spatial Interpolation Methods for Groundwater Level of Haouz in Morocco

Growing water scarcity is one of the major challenges of the 21st century, especially in arid and semi-arid climates such as our study area. The efficient, sustainable and integrated groundwater management plays a key role for conserving this vital resource. In order to overcome this issue, the study of aquifer system’s behavior seems necessary. For this purpose, the areal piezometric level map is an essential tool. As piezometric level data are spatially limited in sample points, the?spatial interpolation and geostatistics are the best way to produce the needed map. Several methods exist allowing to approach real values with varying degrees of accuracy. This work aims to compare?and evaluate spatial interpolation methods for groundwater level of Haouz using a dataset of 39 piezometers. The deterministic methods used in this study are Inverse Distance Weighted (IDW) and Radial Basis Functions (RBF) and the probabilistic ones are ordinary kriging (OK), simple kriging (SK) and universal kriging (UK). This study shows the difficulty of having a key role to choose the suitable method for given input dataset. The best model remains the one that, after comparing several methods, offers the best accuracy, which is assessed using Cross-validation and statistical indicators. The results reveals that ordinary kriging with trend removal technique is the optimal method in this case. It indicates the superiority of this technique with a decrease in Root Mean Square Error (RMSE) up to 61.67%. It underestimates groundwater level with an average of 2.8%, which is reliable. The areal piezometric level and associated prediction standard error maps give additional information and recommendations that characterize the studied aquifer system and will ultimately improve sustainable groundwater management.

Self-Care Activities among Patients with Type 2 Diabetes in Morocco: Prevalence and Determinants

Background: Self-care is an important, though often neglected, area of type 2 diabetes management in lower and middle income countries (LMICs). In Morocco, whilst the evolution of the disease is increasing rapidly, evidence documenting disease self-care patterns remains scarce. Objectives: To estimate the prevalence of self-care activities among patients with type 2 diabetes in Morocco, and to identify the factors associated with good self-care practices. Methods: We performed a secondary analysis of data of 406 patients aged 30 years old and over, diagnosed with type 2 diabetes mellitus for at least 6 months. Self-care activities were assessed using the Moroccan version of the Summary of diabetes self-care activities. Studied factors included socio-demographics, disease features and healthcare use. Unadjusted and adjusted odds ratios were calculated using logistic regression. Results: Mean age was 55.8 ± 11.6 years old. Females represented 68.7% of the respondents. Mean estimates of the frequency of self-care practices exceeded 3.5 days per week for diet, exercise and foot-care;of these, good dietary behavior was the most prevalent (63.6%). In multivariate analysis, females displayed better dietary behavior (OR = 1.81 [1.27 - 2.58]), and less frequent foot care (OR = 1.81 [1.27 - 2.58]) than males. Lower levels of exercise were associated with being female (0.42 [0.26 - 0.68]), and belonging to the higher income category (0.55 [0.34 - 0.88]). Residents in rural areas also reported better exercise practices (1.72 [1.07 - 2.78]). Conclusion: This study draws attention to self-care practices and their determinants in the Moroccan context. Such findings should help in the design, implementation, and evaluation of self-management interventions for people with type 2 diabetes.

Accumulation of Copper, Lead, Chrome, Cadmium in Some Tissues of <i>Procambarus clarkii</i>in Rharb Region in Morocco

Different concentrations of four metals namely copper, lead, chrome and cadmium were evaluated in crayfish Procambarus clarkii tissues (carapace, flesh) for a six-month period, from March to August 2013 in the Rharb of Morocco (Lagoon Merja Zerga and Nador canal). The determination of heavy metals was carried using atomic absorption spectroscopy Varian VV20. The results obtained revealed a metal’s contamination of Procambarus clarkii in both sites. Concentrations of heavy metals examined Procambarus clarkii carapace ranged as follows: Merja Zerga (Pb 2.07 - 6.7 μg/g;Cu 2.9 - 9.97 μg/g;Cr 0.89 - 14.22 μg/g dry weight) and Nador canal: (Pb 0.08 - 7.8 μg/g;Cu 3.40 - 9.3 μg/g;Cr 0.87 - 3.5 μg/g dry weight). Concentrations of heavy metals found in flesh were as follows: Merja Zerga (Pb 0.02 - 5.25 μg/g;Cu 9.58 - 23.59 μg/g;Cr 0 - 2.71 μg/g dry weight) and Nador canal (Pb 0.06 - 6.81 μg/g;Cu 9.5 - 37.20 μg/g;Cr 0 - 3.23 μg/g dry weight). The distribution of those metals in Procambarus clarkii shows high levels of contamination for lead, copper and chrome with an absence of cadmium in both sites (Merja Zerga and Nador canal). The concentrations differed in carapace and flesh.

基于互信息和MiniRocket网络的CFST脱空识别

为提高钢管混凝土(concrete filled steel tube,CFST)脱空检测的效率和精度,本文提出了一种基于快速傅里叶变换(fast fourier transform,FFT)、互信息(mutual information,MI)和MiniRocket神经网络的智能识别方法。首先,采用FFT将待测CFST敲击声波时域信号转换为频域信号;其次,采用MI建立频域信号与脱空状态的相关性,提取相关性最大的前30个特征建立数据集,避免了复杂的数学运算和冗余信息;建立MiniRocket深度学习网络,通过使用更少的参数量和更小的特征尺寸,提高分类的速度和精度。最后,考察了模型的噪音鲁棒性,并与其他算法、特征提取方法和识别方法进行对比。结果表明,在不同脱空深度和脱空宽度下,所提的方法在100次重复试验中获得了100%的平均预测精度。在高信噪比下,该方法受影响较小。此外,与其他算法、特征提取方法和识别方法相比,本方法具有更好的预测性能。因此,所提出的方法在未来实际CFST结构的智能脱空识别中具有较大的应用潜力。