mlsa-iai-msu-lab/ru_sci_bench_zho_cite_reranking huggingface dataset:
Air quality management in China:Issues,challenges,and options

This article analyzed the control progress and current status of air quality,identified the major air pollution issues and challenges in future,proposed the long-term air pollution control targets,and suggested the options for better air quality in China.With the continuing growth of economy in the next 10-15 years,China will face a more severe situation of energy consumption,electricity generation and vehicle population leading to increase in multiple pollutant emissions.Controlling regional air pollution especially fine particles and ozone,as well as lowering carbon emissions from fossil fuel consumption will be a big challenge for the country.To protect public health and the eco-system,the ambient air quality in all Chinese cities shall attain the national ambient air quality standards (NAAQS) and ambient air quality guideline values set by the World Health Organization (WHO).To achieve the air quality targets,the emissions of SO_2,NOx,PM_(10),and volatile organic compounds (VOC) should decrease by 60%,40%,50%,and 40%,respectively,on the basis of that in 2005.A comprehensive control policy focusing on multiple pollutants and emission sources at both the local and regional levels was proposed to mitigate the regional air pollution issue in China.The options include development of clean energy resources,promotion of clean and efficient coal use,enhancement of vehicle pollution control,implementation of synchronous control of multiple pollutants including SO_2,NOx,VOC,and PM emissions,joint prevention and control of regional air pollution,and application of climate friendly air pollution control measures.
实习护士手卫生依从性培训效果分析

随着医院现代化的发展,医院感染的特点不断发生变化,感染率有所上升,已成为一个重要的公共卫生问题〔1〕。其中医护人员手卫生依从性的不高也是造成医院感染率上升的原因之一,调查发现医护人员一般手带菌104个,吸痰手带菌108个,换药手带菌108~9个,端便盆手带菌1010~11个。实习生参与这样操作的机会较多,接触患者的时间长,造成院内感染的机率较大,因此,应对实习生进行岗前有关手卫生知识培训。为了有针对性地做好岗前培训工作,武警辽宁总队医院对2010 - 2011年在院实习的86名护生进行了问卷调查。结果报告如下。
兴奋剂生长激素检测方法研究进展

人生长激素是人体自身分泌的重要的肽类激素。重组人生长激素不仅应用于临床医疗,也被滥用于体育运动中,以提高运动成绩。生长激素的检测方法一直是世界各国反兴奋剂工作的研究热点。
Performance comparison between Logistic regression, decision trees, and multilayer perceptron in predicting peripheral neuropathy in type 2 diabetes mellitus

Background Various methods can be applied to build predictive models for the clinical data with binary outcome variable. This research aims to explore the process of constructing common predictive models, Logistic regression (LR), decision tree (DT) and multilayer perceptron (MLP), as well as focus on specific details when applying the methods mentioned above: what preconditions should be satisfied, how to set parameters of the model, how to screen variables and build accuracy models quickly and efficiently, and how to assess the generalization ability (that is, prediction performance) reliably by Monte Carlo method in the case of small sample size. Methods All the 274 patients (include 137 type 2 diabetes mellitus with diabetic peripheral neuropathy and 137 type 2 diabetes mellitus without diabetic peripheral neuropathy) from the Metabolic Disease Hospital in Tianjin participated in the study. There were 30 variables such as sex, age, glycosylated hemoglobin, etc. On account of small sample size, the classification and regression tree (CART) with the chi-squared automatic interaction detector tree (CHAID) were combined by means of the 100 times 5–7 fold stratified cross-validation to build DT. The MLP was constructed by Schwarz Bayes Criterion to choose the number of hidden layers and hidden layer units, alone with levenberg-marquardt (L-M) optimization algorithm, weight decay and preliminary training method. Subsequently, LR was applied by the best subset method with the Akaike Information Criterion (AIC) to make the best used of information and avoid overfitting. Eventually, a 10 to 100 times 3–10 fold stratified cross-validation method was used to compare the generalization ability of DT, MLP and LR in view of the areas under the receiver operating characteristic (ROC) curves (AUC). Results The AUC of DT, MLP and LR were 0.8863, 0.8536 and 0.8802, respectively. As the larger the AUC of a specific prediction model is, the higher diagnostic ability presents, MLP performed optimally, and then followed by LR and DT in terms of 10–100 times 2–10 fold stratified cross-validation in our study. Neural network model is a preferred option for the data. However, the best subset of multiple LR would be a better choice in view of efficiency and accuracy. Conclusion When dealing with data from small size sample, multiple independent variables and a dichotomous outcome variable, more strategies and statistical techniques (such as AIC criteria, L-M optimization algorithm, the best subset, etc.) should be considered to build a forecast model and some available methods (such as cross-validation, AUC, etc.) could be used for evaluation.
Metabolic disorders of fatty acids and fatty acid amides associated with human gastric cancer morbidity

Background Gastric cancer (GC) is one of the most common types of cancer in the world. A change in the metabolism of lipids in tumor cells could lead to the pathogenesis of cancer. In this study, we investigated fatty acid and fatty acid amide metabolic perturbations associated with GC morbidity. Methods Gas chromatography/mass spectrometry (GC/MS) was utilized to analyze fatty acids (FAs) and fatty acid amides (FAAs) of GC tissues and matched normal mucosae from 30 GC patients. Acquired lipid data was analyzed using non parametric Wilcoxon rank sum test to find the differential biomarkers for GC and diagnostic models for GC were established by using orthogonal partial least squares discriminant analysis (OPLS-DA). Results A total of 13 FAs and 4 FAAs were detected using GC/MS and 5 differential FAs as well as oleamide were identified with significant difference (P <0.05). The OPLS-DA model generated from lipid profile showed adequate discrimination of GC tissues from normal mucosae while the OPLS-DA model failed to separate GC specimens of different TNM stages. A total of 8 variables were obtained for their most contribution in the discriminating model (Variable importance in the projection (VIP) value >1.0), five of which were detected with significant difference (P <0.05). Conclusions FA and FAA metabolic profiles have great potential in detecting GC and helping understand perturbations of lipid metabolism associated with GC morbidity.
针刺配合核心稳定锻炼治疗膝骨性关节炎35例

笔者通过长期的临床观察发现膝骨性关节炎的病变与腰部的核心稳定性有关,因此在针刺治疗膝骨性关节炎的同时配合加强腰部核心稳定性锻炼,现将结果报道如下。
Biological macro-idea and criterion of osteopathic fracture immobilization in China's traditional mongolian medicine

OBJECTIVE:To investigate the biological macro-idea and criterion of osteopathic fracture immobilization in China’s traditional Mongolian medicine.METHODS:Based on biological naturalism regarding the relationship between man and universe(including psychosomatic integration) in osteopathic fracture immobilization in China’s traditional Mongolian medicine,we used modern physiopsychological and biomechanical principles and methods to investigate the biological macro-characteristics of humanization,behaviorism,and wholism in "dynamic" fixation of fractures.RESULTS:Osteopathic fracture immobilization in China’s traditional Mongolian medicine is based on the fixation criterion of macro-idea and method as well as on geometry,mechanics,motion,and stress and psychological stability in "non-sheltered fixation" of fractures contained in the life view of nature,regarding the relationship between man and universe(including psychosomatic integration) and on harmony between the limbs and the whole body,between body and function,and between man and nature.CONCLUSIONS:Osteopathic fracture immobilization in China’s traditional Mongolian medicine is fixation without trauma or shelter.The principle and method of whole,dynamic,and functional fixation of fractures is not only radical,but also represents a new direction for developing the principle and method of fracture immobilization.
Research ideas and strategies on the dose-effect relationship of traditional Chinese medicine prescriptions and herbs

We discuss here the complexity of the doses of traditional Chinese medicine(TCM) prescriptions and herbs from different viewpoints,including the heterogeneity of drug quality,the flexibility of prescriptions,and the diversity of drug effects.Then,the corresponding research ideas and strategies are proposed.We can reveal the actual situation of clinical doses based on in-depth "real-world study" of the safety and effectiveness of TCM prescriptions,create an analytical method for dose-effect relationships in accordance with the features of TCM,and reveal the correlated regular nature of the effectiveness and dosage of TCM prescriptions and herbs.
Effects of Wei Chang An pill(胃肠安丸) on enzyme activity and levels of vasoactive peptide and substance P in the small intestine of rats with compound diarrhea

OBJECTIVE:To investigate the regulatory effects of Wei Chang An Pill(WCAP) on enzyme activity and gastrointestinal hormones in the small intestine of rats with compound diarrhea.METHODS:Forty Wistar rats were randomly divided into a control,diarrhea model,and WCAP high,medium,and low dose groups.The control group was not treated,and the model group was administered intragastric distilled water.The WCAP groups were given WCAP suspension,80,60 or 40 mg · kg-1 · d-1,for 4 days.Stool properties were observed.After the experiment,thymus and spleen indices were measured,and the activities of lactate dehydrogenase(LDH),malate dehydrogenase(MDH),and disaccharidase(lactase) in the small intestinal mucous membrane,and levels of substance P(SP) and vasoactive peptide(VIP) in the colon were determined.RESULTS:Compared with the control group,thymus and spleen indices were significantly decreased,LDH,MDH,and disaccharidase activity in the small intestine was decreased,and SP and VIP levels in the colon were significantly increased inthe diarrhea model group.Compared with the model group,thymus and spleen indices were significantly increased,and LDH,MDH,and disaccharidase activity in the small intestine and SP and VIP levels in the colon were significantly decreased in theWCAP medium dose group.CONCLUSION:The diarrhea model rats exhibited pathological changes including atrophy of the thymus and spleen,decreased enzyme activity in the small intestine,and gastrointestinal hormone disturbance.WCAP can increase the activity of intestinal digestive enzymes and regulate gastrointestinal hormones,thereby relieving diarrhea.
肿瘤化疗患者焦虑、抑郁的非药物干预研究进展

化学治疗是一种全身性治疗,是目前肿瘤治疗的主要手段之一。但患者在化疗过程中不仅要忍受药物不良反应带来的躯体折磨,还要经历一系列复杂的心理困扰,其中最常见是焦虑和抑郁[1-2]。生物-心理-社会医学模式要求护士在为患者提供身体疾病治疗的同时,更关注患者心理状况。焦虑、抑郁等负性情绪会降低机体免疫系统对肿瘤细胞的识别和杀伤能力，影响化疗药物的疗效发挥，并增加不良反应发生频率。目前针对肿瘤化疗患者焦虑、抑郁的干预措施层出不穷，本研究旨在将非药物性干预措施整理归纳，并探寻其优缺点，为临床实践提供依据。
基于岗位胜任力的新护士岗前培训大纲的构建

目的以胜任力理论框架为指导,以新护士工作任务为导向,构建一套基于岗位胜任力的新护士岗前培训大纲。方法主要采用德尔菲法进行2轮专家咨询。结果确立的大纲包括9大培训项目和31项培训内容,并确定了相应的培训目标和学时。结论对于岗前培训大纲的研究结果,专家积极系数和权威程度较高,意见相对集中,咨询结果可靠。该大纲基本涵盖了新护士需具备的岗位胜任力,具有较好的科学性、实用性和可操作性。
1例镜像右位心伴大动脉转位术后的护理

镜像右位心在临床分类上属于右位心的一种，其发病率低下，80%患者常合并如大血管转位、室间隔缺损等各种心内畸形。这些畸形通常需要外科手段矫正，以改善患者的循环状况，满足其生长发育需要。患者术后易发生各系统的并发症，因此在护理过程中需要运用合理、科学、人性化的护理措施最大限度避免术后早期各种并发症的发生，确保术后安全，提高手术成功率。
新疆产西红花的质量评价

目的 对产自新疆的西红花Crocus sativus L。质量进行评价。方法 采用《中国药典》2010年版中西红花浸出物、吸光度、总苷量、重金属、农药残留的检测方法,对新疆产的西红花中的各指标进行检测。色谱柱C18柱(250 mm×4.6 mm,5 μm);流动相为甲醇-水(45∶55);体积流量1.0 mL/min;检测波长440 nm;进样量10 μL;柱温为室温。结果 浸出物质量分数为67.8%,吸光度(A)值为0.78,含西红花苷-I为8.02%,含西红花苷-II为5.59%,砷、铅、汞、镉、六氯环己烷、双对氯苯基三氯乙烷(DDT)分别为0.480、0.762、0.028、0.163、0.013、0.027 mg/kg。结论 新疆产的西红花各项指标均符合《中国药典》中西红花的质量标准和药用植物及制剂进出口绿色行业标准的规定,西红花在新疆的无公害种植获得成功。
正交试验优选金荞麦的提取工艺研究

目的 优选金荞麦中有效成分表儿茶素的提取工艺。方法 采用HPLC法测定表儿茶素,以干膏得率和表儿茶素提取率为考察指标,采用正交试验设计优选最佳提取工艺。结果 优选工艺为药材加10倍量45%乙醇,回流提取3次,每次1.5 h。结论 优选所得的工艺稳定可行,可作为金荞麦的提取工艺。
正交试验优选人参多糖的提取工艺

目的 优选人参多糖的最佳提取工艺。方法 以多糖提取率、糖醛酸提取率和相对分子质量为指标,比较3种不同提取方法(水提、酸提和碱提)的提取效果,并采用正交试验优选最佳提取工艺。结果 人参多糖的最佳提取工艺为15倍量水,100 ℃水浴提取3次,每次3 h。结论 该工艺操作简单、稳定性好,可用于产业化生产。
紫丁香树枝化学成分研究

目的 研究紫丁香Syringa oblata树枝的化学成分。方法 采用硅胶柱色谱和高效液相色谱等进行分离纯化,通过薄层色谱及波谱数据分析进行结构鉴定。结果 分离得到了20个化合物,分别鉴定为橄榄苦苷(1)、(8E)-ligstroside(2)、对羟基苯乙醇乙酸酯(3)、4-羟基-3, 5-二甲氧基苯甲醛(4)、对羟基苯乙醇(5)、3, 5-二甲氧基-4-羟基肉桂醛(6)、3, 4-亚甲基二氧苯酚(7)、(+)-pinoresinol(8)、芹菜素(9)、2-(3, 4二羟基) 苯乙醇乙酸酯(10)、(+)-丁香树脂酚(11)、落叶松脂醇(12)、落叶松脂醇-9-乙酸酯(13)、丁香苦苷(14)、丁香素(15)、(9R)-9-O-methylcubebin(16)、胡萝卜苷(17)、(9S)-9-O-methylcubebin(18)、4, 4′, 8, 9-四羟基-3, 3′-二甲氧基-7, 9′-单环氧木脂素(19)、4, 4′-二羟基-3, 3′, 5-三甲氧基双四氢呋喃木脂素(20)。结论 化合物4、6、7、13、16、18~20为首次从该植物中分离得到。
利用卫星测高与卫星重力数据进行中国近海上层地转流速度分析

利用卫星测高技术获取的海面高、卫星重力数据以及最新的Argo漂流速度数据确定我国海域稳态海面地形,研究分析中国近海上层地转流的变化特征。结果表明,中国近海地转流沿x方向分量流速范围为0.1~1.6m/s,其误差在±0.97m/s以内;沿y方向分量流速范围是0.1~1.70 m/s,最大误差为±0.66 m/s。
表层声速对多波束系统测量的影响

根据多波束系统通过声线跟踪反演波束测点的空间位置。在声线弯曲改正中换能器表层声速对波束指向角、波束脚印在船体坐标系下的平面位置和水深、测量覆盖宽度等都有着直接的影响,尤其是对边缘波束的测量精度影响特别大。在从理论上分析表层声速对多波束系统测量影响的基础上,利用实际测量的数据论述表层声速对多波束系统的重要性,以及在实际测量中应实时采集表层声速的必要性。
高精度GPS大型桥梁工程控制网数据处理与质量评估方法研究

以某大桥GPS首级控制网的观测数据为基础,探讨高精度GPS数据处理的关键技术,提出采用基准点技术和卫星轨道固定技术进行基线解算的思路,分析基线处理与网平差的精度评估方法,最后总结一套高精度GPS大型桥梁工程控制网数据处理与质量评估方法。实践证明,应用该方法可获得较高的数据处理精度。
Microbial and hydrodynamic properties of aerobic granules in a sequencing batch reactor treating landfill leachate

A sequencing batch reactor (SBR) seeded with activated sludge was established for landfill leachate treatment. Small bio-aggregates began to appear after 40-d operation, and gradually changed to mature aerobic granules, with a mean size of 0.36–0.60 mm. Their sludge volume index at 5 min (SVI5 min), mixed liquor volatile suspended solids (MLVSS), and wet density were around 35 ml/g, 3.4 g/L, and 1.062 g/cm~3, respectively. The settling velocities of the granules in distilled water ranged from 0.3 to 1.3 cm/s, which were faster than those in landfill leachate with a salt content of 1.4% (w/v), and also slightly faster than those predicted by Stokes’ law for porous but impermeable particles. Microbial community evolution during the granulation process and stages under different nitrogen loading rates (NLRs) were monitored and analyzed by polymerase chain reaction-denaturing gradient gel electrophoresis (PCR-DGGE), cloning, and sequencing of 16S ribosomal RNA (rRNA) fragments. Results revealed that some primary and dominant communities in inoculating activated sludge died out gradually; while a few common bacteria, inhabiting soils, municipal wastewater, or activated sludge systems, dominated in the SBR system throughout. In addition, some other dominant species, associated with the aerobic granulation process, were thought to play a significant role in the formation and growth of aerobic granular sludge. During the stable operation time under low NLR, a few species were present in abundance, and may have been responsible for the high organic removal efficiency at this time.
PVP/PKP术后手术椎体再发骨折的研究进展

经皮椎体成形术(percutaneous vertebroplasty,PVP)和经皮椎体后凸成形术(percutaneous kyphoplasty,PKP)是目前治疗骨质疏松性椎体压缩骨折(osteoporotic vertebral compression fractures,OVCFs)较为理想的微创手术方式,通过向椎体内注入填充材料以强化椎体,达到缓解疼痛、恢复椎体高度、矫正后凸畸形,从而提高生活质量的目的。国内外大量的文献报道了PVP和PKP治疗OVCFs的优良疗效~([1-3]),然而,在椎体强化术后,手术椎体仍有可能出现再发骨折。笔者对PVP或PKP术后手术椎体再发骨折的研究进展作一综述,以提高对手术椎体再发骨折的认识,加强对其的防治措施。
连续性血液净化治疗难治性水肿35例

连续性血液净化(CBP)是一种连续、缓慢清除水分和溶质,对脏器起支持作用的血液净化技术,现已成为救治多种急危重症患者的重要手段。难治性水肿常与对袢利尿剂抵抗有关,目前仍然是临床医生面临的棘手问题。我们利用CBP技术治疗35例难治性水肿患者取得较好疗效。
体外高频超声对颈段气管狭窄患者的气管测量

综上,对于颈段气管狭窄中前侧壁病变所致狭窄者及已置气管支架者,高频超声可以较准确地评估气管狭窄内径,为临床治疗后随诊复查提供参考价值。
磷脂酶Cεl基因与肿瘤关系研究进展

磷脂酶Cε1 (phospholipase C epsilon-1,PLCE1)是近年来发现的磷脂酶家族C的新成员,其分子结构和功能均较复杂,在细胞信号转导过程中可能起重要作用。PLCE1的激活可引起一系列的生化反应,如调节细胞生长、增殖、分化等。此外,小G蛋白的ras超家族和PLCE1之间存在相互作用,且小G蛋白家族成员绝大部分都是癌基因编码的蛋白,它们在细胞内过度表达或激活与肿瘤的发生发展关系密切,因此,PLCE1可能作为ras的直接下游效应因子影响细胞骨架改变、细胞运动、凋亡、肿瘤生成及发展等。研究表明, PLCE1基因与皮肤肿瘤、头颈部鳞癌、膀胱癌及部分消化道肿瘤的发生和发展密切相关。现对PLCE1基因及其在肿瘤中的发生机制进行综述。
晚期结直肠癌外科治疗策略的思考

晚期结直肠癌目前国内外尚无明确定义。依据国内外文献报道、多年实践经验及与相关学者交流,笔者总结归纳认为,晚期结直肠癌应包含局部晚期和全身晚期2种类型。所谓局部晚期,是指肿瘤穿透肠壁全层侵及邻近组织器官,需行联合脏器切除者,这其中包含可切除和不可切除2种情况,可切除又包含受累器官为癌性浸润和炎性浸润2种类型,每种类型患者的预后差异很大。全身晚期患者泛指Ⅳ期患者,亦有文献报道三站以远淋巴结转移者也属全身晚期。我国结直肠癌患者中,晚期病例在总发病人数中仍占有相当比例,文献报道在12%~20%。近年来随着治疗理念的不断更新、医疗器械的革新发展以及新的分子靶向药物不断应用于临床,晚期结直肠癌患者的预后已经有了较大改观,整体的5年生存已由原来的15%~20%提高到25%~40%。但就晚期患者个体而言,除肿瘤本身的生物学行为、转移灶的局部情况外,治疗选择的正确与否也是至关重要的因素。因此,对晚期结直肠癌患者实施规范合理的治疗,对于改善结直肠癌患者的整体预后及生存质量尤为重要。同时,笔者在多年临床工作中发现,那些可一期同时完整切除原发灶和转移灶的病例,其预后要远优于无法行根治性R0切除或未切除转移灶者,而二者依目前临床病理分期可能仍属同一期。由此,也引发了笔者关于Ⅳ期结直肠癌患者病理分期合理性的思考。在此笔者愿就其分期的合理性及治疗策略的选择谈几点自己的看法。
外伤性地衣芽孢杆菌性眼内炎一例

此例地衣芽孢杆菌性眼内炎的特点如下:(1)为巨大非磁性非金属异物所致;(2)病情介于蜡样芽孢杆菌及葡萄球菌之间,不如蜡样芽孢杆菌凶险,预后相对较好;(3)无咖啡色外观及角膜环形浸润,无发热与白细胞增多等全身反应,其对药物敏感性与蜡样芽孢杆菌相似;(4)玻璃体切除术并玻璃体腔注射抗生素为有效的治疗手段。
多发性外毛根鞘囊肿一例

讨论外毛根鞘囊肿(tricholemmal cyst)常见于毛囊密集的部位,90%以上的皮损见于头皮部位。早在1977年Leppard~([1])就报道1例黑头粉刺痣患者皮疹表面出现多个毛根鞘囊肿损害。随后Premalatha等~([2])提及多发性外毛根鞘囊肿的概念并报道1例该病患者。沈宏等~([3])报道1例外毛根鞘囊肿患者,虽然目前认为外毛根鞘囊肿常多发,但国内少见多发性外毛根鞘囊肿报道。本病需作活检明确诊断。在组织学上应与增生性外毛根鞘瘤鉴别,后者为实性肿瘤样增生,瘤细胞可有轻度异形,并见鳞状漩涡及个别角化不良~([4-5])。
以多浆膜腔积液就诊的巨大主动脉假性动脉瘤

主动脉假性动脉瘤临床表现缺乏特异性,诊断主要依赖影像学检查。多普勒超声无创简单,但分辨率较低,图像不直观,对操作者依赖较高;MRI检查中真、假性动脉瘤鉴别较困难,且因为流动伪影等因素不作为首选;数字成影血管造影(DSA)检査虽为血管性疾病诊断金标准,但其为有创操作,并发症多,且部分假性动脉瘤瘤体存在血栓机化等情况,DSA不能反应其真实瘤体大小。相比之下,CTA检查作为无创血管成像方法,能提供动脉瘤的瘤体、破口大小、有无血栓形成及其相邻组织解剖结构变化等情况,具有安全、可靠等优越性,目前可作为其首选的检査方法~([4])。该患者于外院仅行胸部CT平扫及心脏超声检查,均提示为心包积液,不能明确其性质,从而造成漏诊与误诊。而我院采用胸部CTA检查,及时发现病灶并给予急诊手术治疗。故临床上如有怀疑假性动脉瘤或发现不明原因心包积液,必须进一步行增强CT或CTA等检查鉴别。同时对于有外伤史特别是减速伤患者,外伤后如出现腹痛、胸闷胸痛、贫血及进行性多浆膜腔积液,需高度警惕主动脉假性动脉瘤形成,及早行相关检查如胸部增强CT或CTA、DSA等检查明确诊断,以利早期进一步治疗。
加强中医药抗肝纤维化

综上所述,中医药抗肝纤维化的研究目前虽有不足,但其安全性特色和疗效优势明显,在全世界抗肝纤维化临床药物开发中硕果仅存。中医和中西医结合肝病研究者应当坚持研究,扩大成果,为进一步提高临床疗效而努力。希望肝病界和消化界的西医同道们给予更多的关注和指点。让我们携手,为中医药在国际肝纤维化领域取得更高的学术地位而努力。
亚太地区非静脉曲张性上消化道出血专家共识意见解读(六):药物治疗

急性非静脉曲张性上消化道出血(acute nonvariceal upper gastrointestinal bleeding, ANVUGIB)是消化科和急诊科医师常遇到的急症。目前国内、外共识认为,急诊内镜检查评估患者病情,及时必要的内镜下止血处理是抢救成功的关键,而在内镜检查前后,合理使用相关药物,是提高止血效果、减少再出血、提高抢救成功率和患者生存率的重要措施。
Task Partition Technology of pXCube Cloud Model

Query efficiency is bottleneck of XML data cube aggregate query. pXCube is a kind of XML data cube model based on path calculation. Join operations are avoided in this model, but the query efficiency of fact cell is become a new bottleneck. This paper focuses on parallel technology of cloud computing to improve query efficiency of pXCube. Mixed partitioning strategy for fact and dimensions is applied in pXCube cloud model, and the same partitioned vector is adopted. Query parallel algorithm of pXCube cloud model is presented as well. Experiments show that the query cost of pXCube cloud model decreases with the increasing number of parallel nodes gradually. The query cost of fact fragments of each node are close to or even lower than join operations of dimensions, and the Speedup is with better linear. So the model is well suited for decision supported query.
Integrated Performance Optimization of Satellite Communications Constellation

In order to attain better communications performance rather than just expand coverage and save system cost,criteria related to the communications quality and capacity are extracted and revised to build an integrated performance metric system which aims to effectively guide the satellite communications constellation design.These performance metrics together with the system cost serve as the multiple objectives whilst the coverage requirement is regarded as the basic constraint in the optimization of the constellation configuration design applying a revised NSGA-II algorithm.The Pareto hyper-volumes lead to the best configuration schemes which achieve better integrated system performance compared with the conventional design results based merely on coverage and cost.
Efficient Rate Control Algorithm for Multi-view Video Coding

Rate control is one of the key factors influencing the multi-view video transmission.However,there is not a rate control algorithm in the existing Joint Multi-view Video Coding Model.In this paper,an efficient rate control algorithm and a bit allocation strategy for multi-view video coding are proposed.In order to obtain the consistent view quality,a bit allocation model based on the Lagrange optimum algorithm is firstly proposed.Secondly,considering the encoding statistical characteristics of different view types,a view weighting factor is introduced,and it will help improve the precision of bit allocation among views.Compared with the fixed QP control strategy,experiment results show that the proposed algorithm can efficiently control the bit rate and obtain more consistent views,with video visual quality improved.
Energy-efficient Scheme for Multiple Access Network Selection Using Principal Component Analysis

This paper brings forward a novel dynamic multiple access network selection scheme(NDMAS),which could achieve less energy loss and improve the poor adaptive capability caused by the variable network parameters.Firstly,a multiple access network selection mathematical model based on information theory is presented.From the perspective of information theory,access selection is essentially a process to reduce the information entropy in the system.It can be found that the lower the information entropy is,the better the system performance fulfills.Therefore,this model is designed to reduce the information entropy by removing redundant parameters,and to avoid the computational cost as well.Secondly,for model implementation,the Principal Component Analysis(PCA) is employed to process the observation data to find out the related factors which affect the users most.As a result,the information entropy is decreased.Theoretical analysis proves that system loss and computational complexity have been decreased by using the proposed approach,while the network QoS and accuracy are guaranteed.Finally,simulation results show that our scheme achieves much better system performance in terms of packet delay,throughput and call blocking probability than other currently existing ones.
Group Signature Based on Non-interactive Zero-Knowledge Proofs

Non-Interactive Zero-Knowledge(NIZK for short) proofs are fascinating and extremely useful in many security protocols. In this paper,a new group signature scheme,decisional linear assumption group signature(DLAGS for short) with NIZK proofs is proposed which can prove and sign the multiple values rather than individual bits based on DLIN assumption. DLAGS does not need to interact between the verifier and issuer,which can decrease the communication times and storage cost compared with the existing interactive group signature schemes. We prove and sign the blocks of messages instead of limiting the proved message to only one bit(0 or 1) in the conventional non-interactive zero-knowledge proof system,and we also prove that our scheme satisfy the property of anonymity,unlinkability and traceability. Finally,our scheme is compared with the other scheme(Benoitt’s scheme) which is also based on the NIZK proofs system and the DLIN assumption,and the results show that our scheme requires fewer members of groups and computational times.
Influence of Traditional Chinese Values on Consumer Behavior:the Case of Mobile in Shanghai

This study investigates how traditional Chinese values influence Chinese consumer behavior directly and indirectly through the impact on people’s lifestyles and perceived values.The empirical research is conducted in the context of the mobile phone market in Shanghai.The study establishes measurement scales of Confucian value,lifestyle,and customer perceived value for Chinese market.Relationships of multiple factors are tested in the structural equation model and their impacts on consumer behavior are elaborated.Findings indicate that Confucian values not only have a direct impact on Chinese consumer behavior but also indirectly influence this behavior through impacting people’s lifestyles and perceived values.