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Floristic composition of the halophilic and salt-resistant plant population in Hammam-Boughrara (Oran-Algeria) 被引量:1
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作者 Amel Taleb-Bendiab Sari-Ali Noury Benabadji Mohamed Bouazza 《Open Journal of Ecology》 2012年第2期96-108,共13页
This phyto-ecological study is on halophilic and salt-resistant vegetation of Oran region. The semiarid and sometimes arid climate has been defined and confirmed from a bioclimatic point of view. The pedological appro... This phyto-ecological study is on halophilic and salt-resistant vegetation of Oran region. The semiarid and sometimes arid climate has been defined and confirmed from a bioclimatic point of view. The pedological approach used shows a soil with sandy to silty-sandy texture, favoring regression of the vegetation and a halophilic vegetation set up. In this study, we analyze the floristic composition of the northern region of Hammam Boughrara using multiple floristic surveys conducted at three stations along the Tafna wadi. Dominated by Mediterranean and Saharo-Sindian elements, the relatively poor flora (88 species in total) is biologically characterized by a clear dominance of therophytes (>33%) and chamaephytes (>19%) to the detriment of phanerophytes. 展开更多
关键词 Phyto-Ecology Salt-Resistant VEGETATION HALOPHILIC VEGETATION BOTANICAL Characterization BIOCLIMATE Hammam Boughrara oran (Algeria)
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Description of a New Species of <i>Sphincteristomum</i>from Sparid Fishies of the Algerian Coast (Western Mediterranean)
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作者 Sihem Abid-Kachour Salim Mouffok Zitouni Boutiba 《Journal of Environmental Protection》 2013年第10期1129-1136,共8页
The objectif in the present study is description of a new species of Sphincteristomum Oshmarin, Mamaev & Parukhin 1961, named Sphincteristomum mediterraneae, which is described in Oran bay, Algeria. It parasitizes... The objectif in the present study is description of a new species of Sphincteristomum Oshmarin, Mamaev & Parukhin 1961, named Sphincteristomum mediterraneae, which is described in Oran bay, Algeria. It parasitizes the intestine of naturally infected Pagellus erythrinus, Teleostei, Sparidae. The Pagellus erythrinus is in important food fish in the Mediterranean. This genus belongs to the family Apocreadiidae, sub family Schistorchiinae, characterized by an obvious oral muscular sphincter, into a large oral sucker, a disc-shaped acetabulum under the intestinal bifurcation, an ocular pigment scattered in the forebody, a sequence ovary and two testes in tandem and a I-shaped excretory bladder. In the new species, the digestive apparatus displays a hexagonal peculiar aperture, followed by a longitudinal slit, a waved pharynx, two long and broad caeca, with a thick internal wall of endothelial cells. Each caecum has a sub terminal anus. The female genital apparatus displays a transversally elongated ovary, under the acetabulum. On the side of the ovary, there is a small Mehlis gland. Under the ovary, there are two transverse converging vitelloducts. Lateral and extracaecal vitelline follicles, are spread near the caeca. They converge in the hindbody. The relatively short uterus is preovarian, mainly. It contains few large yellow eggs. Its distal part is creased transversally, just before ending in genital atrium. The male genital apparatus shows two lobed heart-shaped testes, post ovarian, in tandem. From the anterior edge of each testis, two spermiducts climb up and converge into a naked, curved or sinuous seminal vesicle, followed by a short prostate surrounded by few prostatic cells, and a narrow ejaculatory duct, opening in genital atrium. The genital pore is close to the acetabulum and the intestinal bifurcation. No cirrus pouch. The excretory system shows a relatively short tubular I-shaped bladder, reaching the inferior level of the second testis. Two thin excretory arms are seen until the forebody of the worms. 展开更多
关键词 DIGENEA Sphincteristomum Oshmarin oran bay Pagellus erythrinus TELEOSTEI
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Physico-Chemical Complex of Matorral Soils of the North Western Region of Algeria
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作者 Fatima Zohra Meftah Noury Benabadji Abdessamad Merzouk 《Open Journal of Ecology》 2019年第5期134-144,共11页
The objective of this study is to determine the influence of soil physico-chemical factors on the spatial distribution of matorrals in the plain from Remchi to Béni-Saf located in the western region of Algeria. T... The objective of this study is to determine the influence of soil physico-chemical factors on the spatial distribution of matorrals in the plain from Remchi to Béni-Saf located in the western region of Algeria. This study informs us of the relationships that soil can have on the diversity of matorrals. On the bioclimatic level, the region is characterized by semi-aridity accentuating the phenomena of thérophysation. Soil analyzes carried out using known methods (Stokes Particle Size Method, Electrometric Method for pH, 1/5 Extract Method for Electrical Conductivity, Bernard Calcium Method for CaCO3, Anne Method for Organic Carbon). The results show a textural diversity;sandy-muddy “Remchi”, sandy “Rachgoun 1 and Rechgoun 2”, not far from Béni-Saf. The low clay content (Remchi: Profile 1: Horizon 1: Clays 10%, Profile 2: Horizon 1: Clays 16%, Profile 3: Horizon 1: Clays 5%, Rechgoun: Profile 1: Horizon 1: Clays 3%, Profile 3: Horizon 1: 2% Clays and Horizon 2: 3% Clays) leads to poor structural stability leading to degradation of the soil surface through erosion. The latter is revealed by the presence of small erosion claws visible on these rough slopes or almost. 展开更多
关键词 SOIL PHYSICO-CHEMICAL FACTORS MATORRAL VEGETATION Anthropization oran (Algeria)
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访加州大学圣芭芭拉分校奥兰·扬(Oran R.Young)教授 被引量:1
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作者 奥兰·扬 崔杨杨 《复旦公共行政评论》 CSSCI 2017年第2期149-156,共8页
崔杨杨:作为国际环境治理领域的知名专家,您很好地将理论范式与具体实践结合了起来,例如您在研究机制分析的同时担任了美国国家科学院全球变化人类维度委员会的创始人,而许多学者似乎很难做到平衡,请问您在自己的研究经历是如何做到的?... 崔杨杨:作为国际环境治理领域的知名专家,您很好地将理论范式与具体实践结合了起来,例如您在研究机制分析的同时担任了美国国家科学院全球变化人类维度委员会的创始人,而许多学者似乎很难做到平衡,请问您在自己的研究经历是如何做到的?奥兰·扬:这里存在着两种不同的联系含义,一种联系是你的研究试图连接理论和应用议题。拿环境治理举个例子,一些学者关注气候变化和海洋问题,这是第一种联系。另一种联系就是分析和实践。这是丹·古德教授所说的术语'理论实践并行者'(pracademic)。 展开更多
关键词 北极地区 oran R.Young 《巴黎协定》 加州大学 芭芭拉
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基于ORAN的RRU前传接口关键技术的实现与分析
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作者 陈崇毅 《长江信息通信》 2022年第10期167-169,共3页
射频拉远单元(RRU)是位于接入网的远端设备,对接空中接口,因此对RRU的实时性要求较高。传统的接入架构是BBU与RRU相连,RRU负责处理中射频信号,基于ORAN的RRU增加了开放前传接口特性,能够保证性能同时兼容各个设备商的DU设备,达到体积小... 射频拉远单元(RRU)是位于接入网的远端设备,对接空中接口,因此对RRU的实时性要求较高。传统的接入架构是BBU与RRU相连,RRU负责处理中射频信号,基于ORAN的RRU增加了开放前传接口特性,能够保证性能同时兼容各个设备商的DU设备,达到体积小,能耗低,通用性强的目标。文章首先介绍了ORAN的架构和前传切分,然后介绍在RRU上实现Option7-2x的切分,并提出了一种在可编程门阵列中实现ORAN协议和LOWPHY的方案,最后比较了不同前传接口的优劣,通过比较得出ORAN架构的实现相对复杂,但降低了前传网络的占用带宽,在设备成本和通用性上有明显优势。 展开更多
关键词 开放前传架构 增强型通用公共无线接口 射频拉远单元
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Evaluation of Metal Contamination of Mullet (Mullus surmuletus L., 1758) in the Bay of Oran
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作者 Borsali Sofia Bouderbala Mohamed Boutiba Zitouni 《Journal of Life Sciences》 2014年第4期344-350,共7页
The present study focused on the evaluation of the contamination by three heavy metals (Cd, Cu and Zn) of a bony fish, Mullus surmuletus L., 1758, caught in the Bay of Oran. This reflects the quality of fish habitat... The present study focused on the evaluation of the contamination by three heavy metals (Cd, Cu and Zn) of a bony fish, Mullus surmuletus L., 1758, caught in the Bay of Oran. This reflects the quality of fish habitat as species common Algerian coastal waters and enjoyed by a large fish-eating population. Monthly sampling was spread over a period of six months (December 2011-May 2012). Given their physiological importance in the body, muscle, liver and gonads were targeted. Metal concentrations were determined by atomic absorption spectrophotometry in flame depends on three parameters (sex, size and month). It appears from this study that the target organs of rouget (M. surmuletus) accumulate three metal pollutants sought. The highest values are those of zinc, copper and cadmium are at concentrations at least important. The results, statistically treated, showed no significant difference between the concentrations of trace metals both sexes and at all three organs considered. The average dose of heavy metals found in the mullet compared to those provided by the literature relating to DMA (Maximum Allowable Doses), are not worrisome. Concentration levels of toxic metals reflect a certain metal pollution in the Bay of Oran. 展开更多
关键词 Rouget Mullus surmuletus heavy metals (Cd Cu Zn) concentration CONTAMINATION DMA oran Bay Mediterranean.
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Fecundity and Distribution of Oocyte Diameters of Horse Mackerel Trachurus trachurus from Algerian Western Coast (Oran Bay)
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作者 Malika Gherram Ahmed Bensahla Talet +1 位作者 Sidi Mohammed El Amine Abi Ayad Fatiha Dalouche 《Journal of Life Sciences》 2013年第12期1272-1277,共6页
In the present paper, a study of the productivity of oocytes in 402 female individuals of the horse mackerel, Trachurus trachurus for an interval of fork length (LF) between 14 cm and 20 cm, in stage IV (pre-spawn... In the present paper, a study of the productivity of oocytes in 402 female individuals of the horse mackerel, Trachurus trachurus for an interval of fork length (LF) between 14 cm and 20 cm, in stage IV (pre-spawning) and V (spawning) was performed to estimate the fecundity rate in Oran Bay (Algerian western coast) since October 2008 to April 2009. Total fecundity (absolute and relative) were calculated using fish length, weight and eviscerated weight of gonads. Absolute fecundity by size class oscillates from 33,375 to 56,391 eggs with an average of 48,686 ±11,470. The relative fecundity ranges from 34,802 to 139,636 eggs per 100 g body weight with an average of 96,955 ± 33,814 and it is varying between 15,544 and 46,561 per gram of gonad with an average of 28,595 ±20,251. The distribution of oocytes shows that stages I and II are presented throughout the spawning season and they constitute a stockpile for subsequent clutches. 展开更多
关键词 CARANGIDAE Trachurus trachurus REPRODUCTION FECUNDITY oran bay Algerian western coast.
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长河二号系统海上定位精度预测与实验研究 被引量:5
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作者 王程峥 李文魁 +1 位作者 高敬东 徐务农 《中国航海》 CSCD 北大核心 2012年第3期23-26,105,共5页
现代罗兰C定位体制正从双曲线定位向圆-圆定位,从单台链定位向多台链交叉定位模式发展。为了提高和扩大长河二号系统的定位精度和覆盖范围,通过理论预测和海上实验,研究了不同定位体制和台站组合模式下的罗兰C定位精度预测模型,给出了... 现代罗兰C定位体制正从双曲线定位向圆-圆定位,从单台链定位向多台链交叉定位模式发展。为了提高和扩大长河二号系统的定位精度和覆盖范围,通过理论预测和海上实验,研究了不同定位体制和台站组合模式下的罗兰C定位精度预测模型,给出了长河二号系统预测等精度线图。结果表明,在相同测量精度条件下,圆-圆定位具有更大的覆盖范围,多台链交叉定位能明显改善台链结合区域的定位精度,考虑ASF(Additional Second-phase Factor,附加二次相位因子)后,该预测模型可以用于长河二号系统定位精度预测。 展开更多
关键词 船舶、舰船工程 罗兰C 双曲线定位 圆-圆定位 多台链 精度预测
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规制的形成、演进动力与有效性——奥兰·扬国际规制理论述评
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作者 吕海洋 《辽东学院学报(社会科学版)》 2023年第2期16-27,共12页
在国际规制形成的问题上,奥兰·扬打破了传统现实主义与功利主义的两分法,将国际规制视为制度谈判的产物。奥兰·扬通过对国际规制的演进动力分析,实现了国际规制研究从静态分析到动态观察的转变。另外,他对国际规制有效性的研... 在国际规制形成的问题上,奥兰·扬打破了传统现实主义与功利主义的两分法,将国际规制视为制度谈判的产物。奥兰·扬通过对国际规制的演进动力分析,实现了国际规制研究从静态分析到动态观察的转变。另外,他对国际规制有效性的研究也进一步拓展了国际规制理论研究的议程。在复合性思维影响下,奥兰·扬强调国际规制理论与实践的相互作用,倡导并创设了一套跨越范式、理论与方法的规制复合体,以此来有效应对当今全球治理面临的挑战。在国际规制理论发展与创新层面,奥兰·扬一直处于领先地位,其贡献不仅仅局限于学术界,也在北极治理与环境治理的实践中发挥了重要作用。 展开更多
关键词 奥兰·扬 国际规制 全球环境治理 国际制度
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一种基于背景差分法的非法侵入监测 被引量:3
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作者 陈东宾 任波 《现代计算机》 2007年第10期36-38,共3页
使用迭代的方法对背景进行及时更新,采用改进的背景差分法,用Otsu's法计算最佳分割阈值,从而实现运动目标的准确提取。实验表明,该方法能够从背景不变的图像序列中较好地提取出运动目标,具有较强的鲁棒性。
关键词 背景提取 Otsu's分割 运动目标提取
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Percutaneous Coronary Intervention for a Pregnant Woman with Acute ST Elevation Myocardial Infarction: A Case Report
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作者 Farouk Boukerche Adam Ahamat Ali +1 位作者 Nadia Laredj Leila Hammou 《World Journal of Cardiovascular Diseases》 2020年第6期357-362,共6页
Acute myocardial infarction in women during childbearing age is rare. We report a case of a 40-year-old female patient with no history or cardiovascular risk factors, 24-week</span><span style="font-fami... Acute myocardial infarction in women during childbearing age is rare. We report a case of a 40-year-old female patient with no history or cardiovascular risk factors, 24-week</span><span style="font-family:Verdana;"> </span><span style="font-family:Verdana;">pregnant who presented with acute coronary syndrome with an ST-elevation anterior extended complicated by cardiogenic shock. Cardiac ultrasound showed systolic dysfunction of the left ventricle at 30%. Emergency coronary angiography revealed subocclusion of the proximal anterior interventricular artery. We performed a primary angioplasty with placement of a stent after balloon predilation with a satisfactory agiographic result and an improvement in the hemodynamic state. The patient gave birth by cesarean section at 30 weeks of pregnancy after a pocket rupture of infectious waters. The newborn died after 72 hours. After 6 years of evolution, the patient remained asymptomatic under medal treatment. 展开更多
关键词 PREGNANCY Acute Coronary Syndrome Primary Angioplasty oran-Algeria
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以利益为本位的制度谈判理论——基于有关国际环境条约的实证分析 被引量:2
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作者 徐崇利 《国际关系与国际法学刊》 2017年第1期1-17,共17页
在国际关系理论中,美国著名学者奥兰·扬(Oran R.Young)创立以利益为本位的'制度谈判'(institutional bargaining)理论。虽然以利益为本位的制度谈判理论不是国际关系学说主流的制度主义理论,但其对影响国际制度谈判之各种... 在国际关系理论中,美国著名学者奥兰·扬(Oran R.Young)创立以利益为本位的'制度谈判'(institutional bargaining)理论。虽然以利益为本位的制度谈判理论不是国际关系学说主流的制度主义理论,但其对影响国际制度谈判之各种假设因素的研究及所选择的对有关国际环境条约缔约实践的实证分析,对国际法学者来说具有重要的启发意义。 展开更多
关键词 奥兰·扬 制度谈判理论 国际法
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旋甘口服液在急性白血病化疗中的应用 被引量:1
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作者 余河庆 刘艳杰 +3 位作者 刘巍 王英平 鲍霜 肖大为 《吉林医学》 CAS 2003年第2期126-127,共2页
目的:观察旋甘口服液在急性白血病病人化疗后升高血小板的效果。方法:选择30例急性白血病患者随机分成两组,均采用标准方案化疗,治疗组口服旋甘口服液30~60ml,1日3次,1个月1疗程。未输注血小板。对照组用黄芪、参麦、益血生,当血小板&l... 目的:观察旋甘口服液在急性白血病病人化疗后升高血小板的效果。方法:选择30例急性白血病患者随机分成两组,均采用标准方案化疗,治疗组口服旋甘口服液30~60ml,1日3次,1个月1疗程。未输注血小板。对照组用黄芪、参麦、益血生,当血小板<20×109/L伴明显出血倾向时输注机采血小板。结果:治疗组血小板上升满意。显效率达80%。全部病例未输注血小板,对照组输注血小板2~5个治疗量/人不等,显效率33%,两组有显著差异P<0.01。结论:旋甘口服液不失为治疗白血病的重要辅助药物。 展开更多
关键词 急性白血病 化学疗法 辅助药物 旋甘口服液
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Germination Behaviour of a Perennial Amaranthaceae of North Western Algeria(Oran):Arthrocnemum glaucum(Del.)Ung.Respectively Submitted to Thermal Factor and Salt Stress
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作者 Amel Sari-Ali Taleb-Bendiab Amel Bensouna +2 位作者 Faical Hassani Tawfik Ferouani Hassiba Stambouli 《Open Journal of Ecology》 2015年第11期544-551,共8页
In light of the importance of seeds germinative phase in the progress of later stages of development of any particular plant species in semi-arid and arid area, it is essential to study the germinative behavior and to... In light of the importance of seeds germinative phase in the progress of later stages of development of any particular plant species in semi-arid and arid area, it is essential to study the germinative behavior and to evaluate the tolerance of a perennial halophyte of Amaranthacaea family, Arthrocnemum glaucum (Del.) Ung. during this crucial phase. A study is devoted to this species seeds germination, which although it’s a mandatory halophyte, it’s less tolerant to salt stress in germination’ phase. Germinative tests are carried out in laboratory, on seeds putted in Petri dishes placed at different temperatures. They enable us to determine the optimal germination temperature, which is 40&#176C while the cold one (5&#176C) completely inhibits it. The seeds of Arthrocnemum glaucum show an optimum germination of 44% in distilled water (NaCl 0 mm) similar to glycophytes but they differ in their ability to germinate at higher salinities. Beyond 300 mM germination is completely inhibited. Prior to break dormancy seeds, a cold treatment at 5&#176C has been achieved;the germination capacity of the seeds increases with the duration of the cold treatment. It increases from 30% after 2 weeks of treatment to 80% after a treatment of 27 weeks. 展开更多
关键词 Arthrocnemum glaucum Halophilic Vegetation GERMINATION Salt Stress oran(Algeria)
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近距离罗兰-C信号周期识别的数字化方法初探
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作者 邹德财 边玉敬 +1 位作者 吴海涛 李云 《时间频率学报》 CSCD 2005年第2期103-108,共6页
对判断罗兰-C脉冲峰值的算法作了改进。对加有噪声的近距离罗兰- C脉冲仿真信号的采样值用改进的算法进行计算后,可识别信号周期并给出相位编码信息。对改进后的算法的有效性用MATLAB进行了验证,并用MODELSIM对改进的算法进行了仿真实... 对判断罗兰-C脉冲峰值的算法作了改进。对加有噪声的近距离罗兰- C脉冲仿真信号的采样值用改进的算法进行计算后,可识别信号周期并给出相位编码信息。对改进后的算法的有效性用MATLAB进行了验证,并用MODELSIM对改进的算法进行了仿真实现。结果表明:在一定的信噪比条件下,改进后的算法初步实现了对近距离罗兰-C信号周期识别的数字化,具有一定的实用性。 展开更多
关键词 峰值 信噪比 罗兰-C MATLAB MODELSIM
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