mlsa-iai-msu-lab/ru_sci_bench_zho_cite_reranking huggingface dataset:
GREEDY NON-DOMINATED SORTING IN GENETIC ALGORITHM-ⅡFOR VEHICLE ROUTING PROBLEM IN DISTRIBUTION

Vehicle routing problem in distribution (VRPD) is a widely used type of vehicle routing problem (VRP), which has been proved as NP-Hard, and it is usually modeled as single objective optimization problem when modeling. For multi-objective optimization model, most researches consider two objectives. A multi-objective mathematical model for VRP is proposed, which considers the number of vehicles used, the length of route and the time arrived at each client. Genetic algorithm is one of the most widely used algorithms to solve VRP. As a type of genetic algorithm (GA), non-dominated sorting in genetic algorithm-II (NSGA-II) also suffers from premature convergence and enclosure competition. In order to avoid these kinds of shortage, a greedy NSGA-II (GNSGA-II) is proposed for VRP problem. Greedy algorithm is implemented in generating the initial population, cross-over and mutation. All these procedures ensure that NSGA-II is prevented from premature convergence and refine the performance of NSGA-II at each step. In the distribution problem of a distribution center in Michigan, US, the GNSGA-II is compared with NSGA-II. As a result, the GNSGA-II is the most efficient one and can get the most optimized solution to VRP problem. Also, in GNSGA-II, premature convergence is better avoided and search efficiency has been improved sharply.
系统交互性理论在安全管理中的应用研究

为了促进系统交互性理论的应用,文章探讨了系统交互性理论在安全管理中应用的意义,并阐述了系统交互性的理论界定及其数理描述,最后以校园火灾事故预防为例分析了系统交互理论的应用效果。
蔬菜泥炭营养育苗块育苗效果分析

为有效解决当前保护地蔬菜自配营养土育苗中存在的不重茬营养土选配、病虫草害防治、育苗工序复杂三大难题,我们于2007年从北京绿色农华植物营养科技有限公司引进了泥炭营养育苗块20 t,在保护地番茄、辣椒、菜豆、甜瓜等多种蔬菜作物育苗上应用。用泥炭营养育苗块育苗与自配营养土营养钵育苗相比具有出苗早、出苗整齐、生长健壮、病害轻、省时省工等优点。1当前保护地蔬菜自配营养土营养钵育苗中存在的三大难题1·1自配营养土选土和配比难以掌握,不重茬的田园土很难选蔬菜种植多年,病残枝、叶、果、根到处都有,从菜田取土育苗不安全。从玉米地田块取土,又受除草剂残留的影响,容易产生药害。另外在营养土配比上不同土质很难确定统一合理的比例,盲目配制育苗营养土,容易出现苗期障碍。如:烧种烧芽、小老苗、死苗等现象。1·2病虫草害难以控制从严格意义上讲,育苗土应用三年以上未种过同科作物的菜园土配以农家肥,而且菜园土和农家肥应在前一年的夏季堆制,充分腐熟、翻堆,杀灭病原菌、虫卵和杂草种子。在实际生产中,我们大多数农民都不能严格做到。
水景和人工湖综合式水处理系统简介

从现行规范、设备、设计数据、处理工艺等方面总结了水景、人工湖等景观水体面临的现状问题。介绍了集曝气、推流+物理杀藻+生物过滤+投放水生动、植物于一体的综合式水处理系统的设计原则、参数,并对景观水处理用节能设备进行了探讨。
厌氧接触—好氧MBR工艺处理豆制品废水

采用厌氧接触—好氧MBR工艺处理豆制品废水。工程实践表明,进水COD_(Cr)为3500～4500mg/L,BOD_5为2000～2400mg/L,NH_3—N为30～40mg/L时,出水COD_(Cr)为30～45mg/L,BOD_5为10～15mg/L,NH_3—N为2～3mg/L,达到《上海市污水综合排放标准》(DB31/199—1997)二级标准。
2008年湖南泸溪椪柑受冻害特点分析及恢复状况

2008年1月中旬至2月初,我国南方出现了较大强度的低温雨雪天气,致使湖南椪柑主产区泸溪县果园遭受了不同程度的冻害。通过调查分析,并根据笔者的生产管理经验,采取了积极的技术自救,使受灾果园树势恢复,有效减少了受灾损失。
长期稻-稻-紫云英轮作对水稻生长发育及产量的影响

为了探讨湘南红壤稻田多熟制的增产潜力,对红壤稻田的轮作制度布置了长期定位试验。研究结果表明:(1)长期稻-稻-紫云英轮作能够促使分蘖速度加快,增加水稻有效穗和粒数,早稻有效穗比稻-稻-冬闲(对照)增加83.1万/hm2,每穗粒数比稻-稻-冬闲增加29,晚稻有效穗比稻-稻-冬闲增加48.0万/hm2,每穗粒数比稻-稻-冬闲增加18。(2)长期稻-稻-紫云英轮作使水稻生育期延迟2～7d成熟,结实率比稻-稻-冬闲降低3.1%～5.1%; (3)长期稻-稻-紫云英轮作能够提高水稻产量尤其是生物产量,水稻稻谷总产比稻-稻-冬闲轮作增产54081.1kg/hm2,增幅26.4%; 水稻稻谷平均产量比稻-稻-冬闲轮作增产1088.0kg/hm2。水稻稻草总产比稻-稻-冬闲轮作增产44109.1kg/hm2,增幅27.1%; 水稻籽粒平均产量比稻-稻-冬闲轮作增产882.2kg/hm2。
碱渣无害化处理

碱渣是油品精制后产生的一种混合物,具有恶臭气味,对人和环境极为有害,是一种危险固体废物。通过加酸中和反应与内循环BAF池处理后,再进入污水处理系统,实现达标排放和碱渣无害化处理,使碱渣排放符合环保要求,具有显著的社会效益。
红树药用植物银叶树的生药学研究

目的对红树植物银叶树进行生药学研究,为开发利用该药材提供参考依据。方法采用原植物鉴别、性状鉴别、显微鉴别、理化鉴别方法对银叶树进行研究。结果药材叶的背面密被银白色鳞片。根、茎、叶均可见大型草酸钙结晶;茎的皮层与韧皮部间有异常维管束,髓部有多个分泌道;叶片主脉维管束发达;粉末中可见晶鞘纤维及非腺毛。经紫外光谱扫描发现有明显的吸收峰。结论上述特征可作为银叶树质量标准的参考依据.
Slicing Recognition of Aircraft Integral Panel Generalized Pocket

To automatically obtain a machining area in numerical control (NC) programming, a data model of generalized pocket is established by analyzing aircraft integral panel characteristics, and a feature recognition approach is proposed. First, by reference to the practical slice-machining process of an aircraft integral panel, both the part and the blank are sliced in the Z-axis direction; hence a feature profile is created according to the slicing planes and the contours are formed by the intersection of the slicing planes with the part and its blank. Second, the auxiliary features of the generalized pocket are also determined based on the face type and the position, to correct the profile of the pocket. Finally, the generalized pocket feature relationship tree is constructed by matching the vertical relationships among the features. Machining feature information produced by using this method can be directly used to calculate the cutter path. The validity and practicability of the method is verified by NC programming for aircraft panels.
肝宁颗粒中大黄的质量控制

目的:建立肝宁颗粒中大黄的鉴别和含量测定方法.方法:采用薄层色谱法(TLC)鉴别大黄,采用高效液相色谱法(HPLC)测定大黄中的5种结合蒽醌.选用NucleosilODS柱,以甲醇-0.1%磷酸溶液(85:15)为流动相,检测波长430nm.结果:高效液相色谱法测定5种蒽醌的线性范围为芦荟大黄素0.0416～0.291 2 μg,大黄酸0.031 2～0.259 84μg,大黄素0.045 76～0.320 32 μg,大黄酚0.049 6～0.347 2μg,大黄素甲醚0.020 64～0.144 48 μg;5种蒽醌的平均回收率均在96.6%～98.4%.结论:本方法简便,准确,灵敏度高,准确性强,重复性好,可用于肝宁颗粒的质量控制.
高效液相色谱法同时测定复方防己颗粒中粉防己碱和防己诺林碱的含量

目的:研究一种能同时准确测定复方防己颗粒中的粉防己碱和防己诺林碱的方法.方法:采用高效液相色谱法测定粉防己碱和防己诺林碱的含量;色谱柱ZorbaxsbC18柱;流动相为甲醇-乙腈-0.002 moL·L-1磷酸二氢钾-乙二胺(55:25:20:0.06),流速1.0 mL·min-1,柱温为室温,检测波长为230 nm,进样量为20 μL.结果:本法可以准确测定复方防己颗粒中的粉防己碱和防己诺林碱,精密度、回收率、稳定性均符合要求.结论:该方法能同时测定复方防己颗粒中的粉防己碱和防己诺林碱的含量,方法简单、快速、灵敏度高,可用于复方防己颗粒的质量控制.
盐酸多奈哌齐口腔崩解片的制备及质量控制

目的:制备盐酸多奈哌齐口腔崩解片并评价其质量.方法:以崩解时间、口感为指标,采用正交设计法优化处方,直接压片法制备,高效液相色谱法测定溶出度.结果:最佳处方为盐酸多奈哌齐4.95 g,MCC 37.5 g,PVPP9.0 g,甘露醇75 g,乳糖15 g,甜蜜素4.5 g,微粉硅胶1.5 g,共制1 000片.所制得口崩片的体外崩解时间小于35 s,口腔内崩解时间小于37 s.5 min内累积溶出度达90%以上,无苦味,无砂砾感,口感良好.结论:处方组成合理,制备工艺可靠,测定方法简便、可行.
小儿喜食糖浆的质量控制研究

目的:制定小儿喜食糖浆质量控制方法.方法:采用薄层色谱(TIC)法对枳壳、山楂分别进行了定性鉴别;采用高效液相色谱(HPLC)法测定小儿喜食糖浆中柚皮苷的含量.结果:本品定性鉴别薄层色谱特征明显,专属性强;柚皮苷在0.208～1.664 μg范围内呈良好的线性关系(r=0.999 8),平均回收率为98.02%,RSD为1.5%.结论:该方法可以准确地进行定性、定量检测,有效地控制制剂的质量.
一氧化氮和心血管疾病(续二)

5.2 反应性氧族清除一氧化氮　　在许多血管病理中,一氧化氮(NO)合成率的变化加上NO清除的增加,会导致NO生物利用度的降低,引起NO信号的减少,在一些病例中还会出现NO源性的毒性.NO生物利用度的减少最基本的机制是O-2对NO的作用.正常生理条件下,O-2在超氧化物歧化酶(SOD)的作用下去氧化转化为过氧化氢(H2O2),最终生成水,防止其对NO产生毒性作用.
肝素抑制佛波酯诱导A549表达黏蛋白5AC和表皮生长因子受体活性的研究

黏液高分泌是慢性气道炎症的重要病理生理特征,黏蛋白决定了黏液的黏弹性.以往的研究显示,病理情况下气道黏蛋白(MUC)以MUC5AC占优势[1].佛波酯(PMA)是有力的促黏液5AC分泌剂,其核心机制为激活表皮生长因子受体(EGFR)的信号通路[2-4].临床上已有研究提示吸入肝素对哮喘、慢性阻塞性肺疾病(COPD)等呼吸系统疾病有效,可以降低气道阻力,改善肺通气功能,使呼吸道黏稠分泌物稀释,促进炎症吸收,但其中的确切机制尚不清楚.本研究旨探讨肝索在佛波脂(PMA)诱导人的肺上皮细胞A549表达MUC5AC中的作用及可能的信号机制,为临床应用提供理论依据.
慢性粒细胞白血病靶向治疗中分子学监测的意义

慢性粒细胞白血病(CML)发病的分子学基础是t(9;22)易位形成具有高度酪氨酸激酶活性的BCR-ABL融合蛋白,以伊马替尼为代表的酪氨酸激酶抑制剂(TKI)能选择性抑制ABL酪氨酸激酶活性[1].与干扰素时代不同,BCR-ABL酪氨酸激酶抑制剂时代,大于80%的慢性期及30%～40%的加速期CML患者应用TKI治疗可获得完全细胞遗传学缓解(CCyR).
早产儿经肠道喂养对策

新生儿良好的存活能力有赖于其胃肠道动力、消化吸收功能及黏膜屏障功能的成熟,而早产儿这些功能均不完善,其中消化吸收和黏膜屏障功能的不成熟可以通过应用静脉营养或早产儿配方奶或母乳强化剂来克服,而胃肠道动力不成熟只能根据其生理特点采取适宜的喂养方法来解决.
更昔洛韦治疗婴儿巨细胞病毒性肝炎合并听力损害的临床研究

目的 观察更昔洛韦治疗婴儿巨细胞病毒性肝炎合并听力损害的治疗效果.方法 对2001-01-01-2006-12-31华中科技大学同济医院111例诊断为巨细胞病毒(CMV)性肝炎同时合并出现听力损害的患儿应用更昔洛韦治疗的效果分析.每次5mg/kg,加入10%葡萄耱液静脉注射1h以上,诱导期2次/日,持续14～21d;维持期每日1次,持续7d.开始治疗后每周监测尿中感染性CMV滴度,共4周.观察治疗前后临床症状改善情况,并监测可能出现的药物副反应.3个月后复查听觉诱发电位.结果 107例病人完成全疗程.另4例中有3例在治疗后第1周内因出现显著中性粒细胞减少而停用药物,1例在治疗10d时黄疸明显加重,ALT较前增高而退出观察.给予更昔洛韦治疗前后比较:血清总胆红素由(93.93±87.95)μmol/L降低至(74.78±90.77)μmol/L(P<0.05);丙氨酸转氨酶(ALT)由(123.24±81.89)IU/L降低至(51.53±38.01)IU/L(P<0.05);天冬氨酸转氨酶(AST)由(163.89±114.86)IU/L降低至(126.05±81.77)IU/L(P<0.05);但肝脾大小、碱性磷酸酶(ALP)、γ-谷胺酰转移酶(γ-GT)和血清总胆汁酸在治疗前后无明显改变.尿CMV的完全转阴率在开始治疗后第1周即达44.8%,第2周达76.6%,第3周迭94.4%,维持治疗至第4周.6例诱导3周不阴转,继续诱导1周仍然持续排毒.72例出院1～2个月后门诊随访复查尿CMV培养,阴性率为77.8%(56/72),复发率为19.4%(14/72),另2例无效者仍然为阳性.尿CMV转阳患儿临床肝炎表现未见复发或加重.共有48例3个月后复查脑干听觉诱发电位,46例恢复正常.完成全疗程的病例中未观察到明显药物副反应,患儿血象和肾功能无明显变化.结论 更昔洛韦对CMV引起的婴儿肝炎和听力损害有明显疗效,而副作用不明显,但仍需密切观察血常规和肝功能,特别是治疗头1～2周内.
白术GC-MS指纹图谱研究

目的 建立白术药材挥发性成分GC-MS指纹图谱分析方法,为白术质量评价提供依据.方法 采用GC-MS联用技术对不同产地白术的挥发性成分进行分析,建立其指纹图谱,确定共有指纹峰.结果 白术挥发性成分中含有18个特征性指标成分,初步建立了以此18个共有峰为特征指纹信息的GC-MS指纹图谱.结论 该方法准确可靠,重现性好,可作为白术内在质量评价的依据.
Singular Hybrid Boundary Node Method for Solving Poisson Equation

As a boundary-type meshless method,the singular hybrid boundary node method(SHBNM)is based on the modified variational principle and the moving least square(MLS)approximation,so it has the advantages of both boundary element method(BEM)and meshless method.In this paper,the dual reciprocity method(DRM)is combined with SHBNM to solve Poisson equation in which the solution is divided into particular solution and general solution.The general solution is achieved by means of SHBNM,and the particular solution is approximated by using the radial basis function(RBF).Only randomly distributed nodes on the bounding surface of the domain are required and it doesn't need extra equations to compute internal parameters in the domain.The postprocess is very simple.Numerical examples for the solution of Poisson equation show that high convergence rates and high accuracy with a small node number are achievable.
Existence and Regularity of Solution to a Thermally Coupled Nonstationary System

In this paper,a coupled elliptic-parabolic system modeling a class of engineering problems with thermal effect is studied.Existence of a weak solution is first established through a result of Meyers'theorem and Schauder fixed point theorem,where the coupled functions σ(s),k(s)are assumed to be bounded in the C(IR×(0,T)).If σ(s),k(s)are Lipschitz continuous we prove that solution is unique under some restriction on integrability of solution.The regularity of the solution in dimension n≤2 is then analyzed under the assumptions on σ(s)∈W1,∞(Ω×(0,T))and the boundedness of σ'(s)and σ''(s).
桥本病合并甲状腺癌28例诊治分析

1988-2007年,我院收治经手术治疗、病理证实的桥本病合并甲状腺癌28例,报告如下.本组28例,女23例,男5例.年龄32～68岁.17例仅有颈部增粗,11例有不同的临床表现.
损伤控制理念在非创伤性外科疾病中的应用

损伤控制(damage control,DC)是近年来颇受重视的一种外科治疗新理念,在抢救危重病人过程中把止血、控制污染和稳定机体内环境作为首要目标.随着对这一理念的进一步深入理解,越来越多的外科医生对其认可并重视,其应用范围也不断扩大.不但在各种创伤和急症外科的处理中取得很大进展和良好效果,而且逐步应用于各类非创伤性疾病中,并存在着更广阔的应用空间.
洞庭湖区双季稻机械化插秧配套栽培技术

为缓解洞庭湖区双季水稻生产期间,特别是"双抢"茬期争季节、争劳力的突出矛盾,减轻劳动强度,实现省工、节本、增产、增收的目标.2005～2008年在湘阴县滨湖稻作区开展了双季稻机械化插秧配套栽培技术的试验示范,取得了良好效果.据对城西镇七龙村100农户的调查统计:双季机插秧与抛秧相比,产量相当,省工11d/hm2,纯收入增加380元/hm2;比手插秧增产约5%,省工29d/hm2,纯收入增加1 830元/hm2.
与时俱进选育高产优质多抗短季棉品种

论述了发展短季棉生产对缓解我国粮棉争地矛盾的意义.短季棉生态区的划分为短季棉育种提供了科学依据,根据生产实际不断调整育种目标和技术路线,培育出多个大面积推广的优良短季棉品种.提出了短季棉育种的远景规划和目标.
Water quality assessment for Ulansuhai Lake using fuzzy clustering and pattern recognition

Water quality assessment of lakes is important to determine functional zones of water use. Considering the fuzziness during the partitioning process for lake water quality in an arid area, a multiplex model of fuzzy clustering with pattern recognition was developed by integrating transitive closure method, ISODATA algorithm in fuzzy clustering and fuzzy pattern recognition. The model was applied to partition the Ulansuhai Lake, a typical shallow lake in arid climate zone in the west part of Inner Mongolia, China and grade the condition of water quality divisions. The results showed that the partition well matched the real conditions of the lake, and the method has been proved accurate in the application.
Vaccination in three different ways against vibriosis of Seriola dumerili caused by Vibrio hollisae

Bacterin was prepared by formalin-inactivating the virulent strain of Vibrio hollisae isolated from diseased Seriola dumerili (amberjack) suffering from vibriosis. Healthy S. dumerili were vaccinated by respective procedures of intramuscular injection, immersion, and orally administration. Results of the three different vaccinations were compared. Blood was drawn from the vaccinated fish every 7 days, and the antibody titers and lysozyme activities of the sera were determined. The antibody titer of injected fish was 1:40 at 7 d, and reached its peak of 1:320 at 28 d, while the fish vaccinated by immersion and orally administration exhibited weak antibody responses, the antibody titres of <1:10, 1:20, 1:160 were observed at 7 d, 14 d, 35 d respectively. Compared with the control, the vaccinated fish exhibited significantly higher lysozyme activities (P<0.05). Upon challenge with virulent strain, the relative percent survival (RPS) of injected, immersed and oral administrated fish were 75%, 45%, and 40% respectively, and the injected fish showed significantly higher RPS than immersed and oral administrated fish. The results suggested that vaccination of S. dumerili by the injection would be the best strategy to prevent the vibriosis in S. dumerili farm.
丽水地区雷暴气候变化特征分析

利用丽水地区7个测站19712000年的逐日雷暴观测资料,通过数理统计,研究了丽水地区的雷暴日数及其初、终日的时空分布特征。结果表明,30年来,丽水地区年平均雷暴日数较多,多年平均年雷暴日数7测站分布较均匀,年际变化大,年雷暴日数有减少的变化趋势;一年12个月都有可能出现雷暴,其中雷暴多集中出现在49月份,以7月份出现最多,1月份出现最少。
湖北潜江利荣新农村示范基地规划设计研究

湖北潜江利荣新农村示范基地在我国大力发展新农村建设的背景中应运而生,其设计立足于本地现状,主要规划有自然生态观光区、乡村旅游体验区、有机农业示范区、水产家禽养殖区,并配套有国家星火培训中心、有机蔬菜园、农事体验园、小龙虾养殖基地等,同时从"成立专门管理机构、落实产业结构调整政策、妥善安置规划区的农民、加强规划区环境管理"4大方面对项目的组织实施进行了有效规划,以期真正实现项目的示范性,进而更好地促进当地的新农村建设及潜江城市建设。
超声内镜检查的护理配合

随着消化内镜技术的不断发展,超声内镜(EUS)检查已成为目前国内胃肠、胆胰疾病的可靠诊断手段。它可直接观察消化道管腔内形态,又可对消化道管壁层次及附近脏器进行探查,且可判定有无邻近脏器的侵润及淋巴结的转移等,对普通内镜不能确诊的黏膜下疾病及消化道肿瘤的分期,有其他检查不能替代的独到之处,故在诊断中越来越显示出其重要价值。
IL-27基因转染对小鼠结肠腺癌细胞生物学特性的影响

目的:获得稳定表达小鼠IL-27(mIL-27)基因的小鼠结肠腺癌细胞株(Colon26),研究IL-27基因对小鼠结肠腺癌细胞体内外生物学特性的影响。方法:通过脂质体法将pcDNA3.1(+)-His(B)/mIL-27质粒转染结肠腺癌细胞,筛选建立高表达细胞株。采用Western blot、ELISA、RT-PCR法证实IL-27基因成功转染Colon26。用MTT比色法检测IL-27质粒转染后对Colon26细胞生长的影响;流式细胞术检测IL-27质粒转染后对Colon26细胞凋亡的影响;将Colon26-IL-27细胞接种于BALB/c小鼠的右侧背部皮下,观察其致瘤性。结果:Colon26-IL-27细胞可表达IL-27mRNA并分泌IL-27,IL-27的表达在体外对Colon26细胞的增殖、凋亡均无影响,而在体内则具有明显的抗瘤活性。结论:成功制备Colon26-IL-27细胞株,证明IL-27能在体内明显抑制肿瘤的生长,延长荷瘤小鼠的生存期,具有一定的抗肿瘤作用。
北仑口岸进境木质包装截获线虫疫情的研究

分析了北仑口岸2006~2007年度进境木质包装的检疫情况,探讨了进境木质包装携带线虫疫情的规律。北仑口岸进境木质包装中截获的线虫主要为滑刃属线虫、小杆目线虫、垫刃目线虫等。线虫检出率与木质包装水分含量有较密切关系,水分含量越高,线虫检出率也越高。具有蓝变症状的木质包装线虫检出率明显高于无蓝变的木质包装。在加施有IPPC标识的木质包装中仍具有较高的线虫检出率。线虫截获数量和线虫检出率无明显季节变化规律。
关于亚磷酸结构的讨论

亚磷酸是重要的化学工业原料。亚磷酸的结构、性质和用途是基础无机化学有关磷及其化合物知识讲授的重要内容,而且还由于其化学式与结构式描写的显著差异和独特的个性,也成为无机化学元素及其化合物知识讲述的重点。
怀念草业界的挚友马成广先生

夜夜心馳向烟洲,晴空秋野思悠悠。共瞻圣火迎盛世,却挽神舟赴仙游。尽献才略强华夏,力兴草业解国忧。余将汗血化大绿,成城广志映天畴。正当北京奥运圣火尚在燃烧,神舟七号载人飞船即将升空之际,我们草业界的挚友、钱老草产业理论和实践的鼎力推行者、新闻界宣传草产业的领军者、中国系统工程学会草业委员会副主任、原新华社农村部主任、教授级高级编辑马成广先生因病逝世离开了我们。就在他病危住院前夕,还在认真审读中国系统工程学会草业委员会起草的有100多位各界人士联名上书中央的《关于国家实施草业强国战略紧急建议书》。
土壤温度对油松(Pinus tabulaeformis)树干液流活动的影响

为了弄清土壤温度对油松树干边材液流活动的影响作用,利用热扩散式边材液流测定系统(TDP-30)和自动气象站对油松边材液流速率和土壤温度等环境因子进行了为期一年的同步测定。结果表明,土壤温度对树干液流活动的影响,一方面与靠近植物最适吸水温度的土层有关,另一方面,与树种的根系分布特征有关。春季表层土壤温度对液流速率的影响最为显著,夏季深层土壤最大,秋季的最大影响土层间于春夏之间。10.0～14.9℃的土壤温度对油松树干边材液流活动的作用最为明显。土壤温度开始对油松液流活动起显著作用的温度阈值约为10℃左右。
消风散对慢性荨麻疹患者血清白三烯水平的影响

目的探讨消风散治疗慢性荨麻疹的临床疗效及其在治疗慢性荨麻疹中的抗炎作用。方法将80例慢性荨麻疹患者随机分为消风散治疗组(40例)、西药对照组(40例),观察治疗效果,并采用酶联免疫法测定治疗组(40例)在治疗前后血清白三烯水平。结果(1)治疗组一疗程治愈率、总有效率与对照组差异无显著性(P>0.05)。(2)消风散治疗组停药后复发率明显低于对照组,差异有显著性(P<0.05)。(3)消风散治疗组治疗前后患者血清白三烯水平差异有显著性(P<0.01)。结论消风散治疗慢性荨麻疹有良好的临床疗效,并能降低患者血清白三烯水平。
典型国家(或地区)科技规划制定及管理的比较研究

我国《国家中长期科学和技术发展规划纲要》发布已经近三年,《国家“十一五”科学技术发展规划》执行期限已经过半,今年底或明年年初即将制定《国家“十二五”科学技术发展规划》。在这种形势下对美国、日本、俄罗斯、韩国等典型国家近10年来的科技规划(计划)的制定、管理与我国进行比较研究,总结其共性特征和差异,挖掘对我国科技规划制定、管理值得借鉴的一些经验,具有重要意义。国家科技规划是一个国家未来特定时期科学技术及其与经济社会协调发展的总体设计,是指导国家科技发展的宏伟蓝图,对一个国家科技发展布局、科技资源分配、科技体制调整等具有重要影响。科技规划包括“指导型”和“指令型”两种类型。
2008年国际形势的回顾与思考

2008年是一个多事之年,国际上、中国国内都发生了很多的事。有些事情的影响是暂时的和局部的,有些事情的影响是长远的和全局的。在观察2008年国际形势时,必须抓住今年的大事。所谓大事,是指影响全局和影响长远的事。从这个角度看,回顾2008年国际形势,大事可能主要有以下四件:一、2008年是自1840年鸦片战争以来,中国的国际地位和影响上升最快的一年2008年北京奥运会使中国从年初开始就成为国际舆论关注的焦点,这不仅是因为奥运会,还因为中国的变化牵动着世界的变化。奥运会是中国人1908年首次提出要举办的,在当时被认为是想入非非,天方夜谭。
从自然科学到工程科学的对称性本体论研究

研究对称性在自然科学和工程科学中的共性,有助于工程师借鉴自然系统,优化工程系统.以生物学和物理学为例,建立了对称性在自然科学中的本体论框架,在此基础上提出一般系统的对称性本体框架.接着对比研究了对称性在机械工程科学中的本体体系,并发现自然科学与工程科学的对称性本体论具有基本一致性.在这一本体论中,提出自然和工程系统中普遍存在功能对称性、原理对称性及时间对称性,同时对空间对称性给出了比较系统完整的分类.进而指出:对称性在自然和工程系统中的存在模式具有层次结构性、相关性、多体性、多元性、多维性和组合性等共性特征.最后简要论及在自然和工程系统中对称性缺失的普遍存在及其与对称性存在的互补作用,并展望了研究前景.
睾丸生殖细胞瘤易感基因Dnd1互作蛋白质的筛选与鉴定

小鼠睾丸生殖细胞瘤(testicular germ cell tumour,TGCT)易感基因Dnd1属于RNA结合蛋白基因家族成员.Dnd1在进化中具有保守性,Dnd1缺乏导致小鼠原始生殖细胞(primordialgerm cell,PGC)的丧失、TGCT的发生和部分胚胎死亡,但Dnd1作用机制还未明了.利用酵母双杂交系统,构建小鼠Dnd1基因诱饵载体pDBLeu-Dnd1,筛选10.5 d的小鼠胚胎cDNA文库,成功筛选到4个与Dnd1相互作用蛋白,其中之一为原癌基因Jun蛋白;进一步的酵母双杂交实验和GST pull down实验再次确认Dnd1与Jun蛋白之间的相互作用.研究发现Dnd1新的相互作用蛋白,这为探明其信号传导通路及Dnd1致病机制研究建立了基础.
塔里木河干流年径流量变化的人类活动和气候变化因子甄别

如何区分人类活动和气候变化对径流的影响,一直以来受到研究者的广泛关注.文中以塔里木河流域近50年来实测径流资料以及塔里木河干流区气象资料为研究对象,采用非参数的Spearman秩次检验和Mann-Kendall检验对干流径流和气象因子时间序列变化趋势进行分析,并在此基础上对二者的突变点进行检验.结果表明,在人类活动影响下干流阿拉尔、新渠满、英巴扎和卡拉水文站年径流量发生突变的年份分别为1970,1972,1974和1974年;而气候变化发生突变的年份则为1993年.人类活动对塔里木河干流(以卡拉水文站计)年径流量减少的影响在20世纪70—90年代和2000—2005年分别为41.96%,74.73%,76.45%和67.18%;气候变化对干流年径流量减少的影响在20世纪90年代和2000—2005年分别为1.67%和2.95%.人类活动是影响干流径流变化的最主要因子.
论人文素养之于生态学者——兼评《绿色人生》

刚到美国不久,邬建国先生赠与小书一本,曰《绿色人生》(高等教育出版社,2008),标题很恬静闲适,就置于案头,希望有时间用以养生.真正打开读是数日之后,跃然纸上的是海外生态学者对生态学研究或自然现象的感想随笔,字里行间的真情流露、生态理念与书的名字很契合.正如王如松先生在此书序中所述:文集中有对大自然鬼斧神工的讴歌和对人类征服自然、掠夺自然野蛮行为的鞭挞;有“小偷浮生半晚闲,轰鸣碧溪月光虹”的仙境和“尼罗河激流生死筏漂,撒哈拉沙漠极限足征”的险象;有群狼喊冤嚎叫的多重交响和大漠残垣的凄凉悲壮,有翻天覆地的佛罗里达飓风和摧枯拉朽的黄石公园火舌,也有鸟儿唧唧、草儿青青、天伦乐乐、邻里融融的怡人、迷人、醉人的平民小区；有沉重的白暨豚绝迹的环境忧患，也有轻松的魁北克郊野的枫糖节欢乐.
Bioleaching of chalcopyrite by pure and mixed culture

The bioleaching of chalcopyrite in shake flasks was investigated by using pure Acidithiobacillus ferrooxidans and mixed culture isolated from the acid mine drainage in Yushui and Dabaoshan Copper Mine in China, marked as YS and DB, respectively. The mixed culture consisted mainly of Acidithiobacillus ferrooxidans, Acidithiobacillus thiooxidans, and Leptospirillum spp. (Leptospirillum ferriphilum and Leptospirillum ferrooxians). The results show that the mixed culture is more efficient than the pure Acidithiobacillus ferrooxidans because of the presence of the sulfur-oxidizing cultures that positively increase the dissolution rate and the recovery of copper from chalcopyrite. The pH value decreases with the decrease of chalcopyrite leaching rate, because of the formation of jarosite as a passivation layer on the mineral surface during bioleaching. In the bioleaching using the mixed culture, low pH is got from the sulfur oxidizing inhibiting, the formation of jarosite. The copper extraction reaches 46.27% in mixed culture and 30.37% in pure Acidithiobacillus ferrooxidans after leaching for 75 d.
Effect of Cu~(2+) ions on bioleaching of marmatite

The effect of Cu~(2+) ions on bioleaching of marmatite was investigated through shake leaching experiments. The bacteria inoculated are a mixed culture of Acidithiobacillus ferrooxidans, Acidithiobacillus thiooxidans and Lepthospirillum ferrooxidans. The results show that zinc is selectively leached, and the addition of appropriate content of Cu~(2+) ions has positive effect on the bioleaching of marmatite. SEM and EDX analyses of the leaching residue reveal that a product layer composed of iron sulfide, elemental sulfur and jarosite forms on the mineral surface. The biooxidation of elemental sulfur is catalyzed by the Cu~(2+) ions, which eliminate the barrier to bioleaching of marmatite and keep low pH value. With the addition of 0.5 g/L Cu~(2+) ions, the maximum zinc extraction rate reaches 73% after 23 d at the temperature of 30 °C with the pulp density of 10%, while that of iron is only about 10%.
Liquid-nitrogen cryopreservation of three kinds of autotrophicbioleaching bacteria

Three kinds of autotrophic bioleaching bacteria strains, including mesophilic and acidophilic ferrous ion-oxidizing bacteria Acidithiobacillus ferrooxidans (A. ferrooxidans), mesophilic and acidophilic sulfur-oxidizing bacteria Acidithiobacillus thiooxidans (A. thiooxidans), and moderately thermophilic sulfur-oxidizing bacteria Acidianus brierleyi, were cryopreserved in liquid nitrogen and their ferrous ion- or sulfur-oxidizing activities were investigated and compared with the original ones. The results revealed that ferrous ion/sulfur oxidation activities of the strains were almost equal before and after cryopreservation. Glycerin was used as cryoprotective agent. In conclusion, liquid-nitrogen cryopreservation is a simple and effective method for autotrophic bioleaching microorganisms.
Microbial community structure and function in sulfide ore bioleaching systems

The severe current situation facing to minerals processing is that the most minerals are characterized by low-grade, being complex and very hard to deal with. It is necessary to find a new way to solve these questions. Nowadays, biohydrometallurgy draw more and more attention because of its simple process, low cost and kindness to environment. However, the lack of suitable bacteria and hard research on the mechanisms between the bacteria and ores or bacteria in gene level result in the low efficiency and poor yield of the target metal in bioleaching. Therefore, the understanding of the microbial community structure and function in the bioleaching systems is very important for the optimization of microbial community by controlling the operating conditions in bioleaching systems, thus enhancing the leaching rate. A review is given on the achievements and progress related to the study on microbial community structure and function in sulfide ore bioleaching systems made in our research group.
微电机应急驱动的一种方法

微电机实验中,有时需对某台电机进行驱动,以观察其特殊性能。这时可以用一台原动机对这台电机进行驱动。由于是临时性的,常常不会有完整的对拖工装夹具及连轴器等,故要实现平稳驱动较困难。下面介绍一种力矩盘棉线传动驱动法,这是一种简单的应急驱动法,实现方便。1应急驱动的实现若想证明一台微型永磁直流电动机是否有匝间短路,可用一台原动机驱动这台直流电动机作发电机运行,然后测试这台电机在不同转速下的比电势。无匝间短路,不同转速下的比电势相等;有匝间短路,不同转速下的比电势不等,转速越高,比电势越小。要实现这种驱动,可以用力矩盘棉线传动法可快速做到。具体方法是:(1)任意找一台高速永磁直流电动机作原动机,调节电源电压可以方便调节驱动转速。(2)制作两个R≥1 cm的力矩盘,套紧在两台电机的旋转轴上,两电机机壳分别固定在工装上,工装可以专制,也可以临时凑合。例如将电机放在一V型块上,上压重物,也可固定。(3)将两装好的电机平行放置,间距靠拢,然后用一根粗棉线闭合成传送带交叉套在两力矩盘槽中,棉线交叉的目的是增大线与力矩盘的摩擦力,以免传动打滑。(4)通电起动原电动机,一般棉线会打滑,发电机不会一下被驱动发电,这时应移开两机距离,绷紧拉线，增大摩擦力，发电机就会被驱动发电。
复杂多相流动分子动力学模拟在GPU上的实现

利用CUDA(Compute Unified Device Architecture)技术进行了图形处理器(GPU)上的分子动力学(MD)模拟.在一片Tesla C870上,其速度20～60倍于Intel Xeon 5430 CPU之单核,最高可达150 Gflops.通过方腔流及颗粒-气泡接触等实例初步展示了此方式从微观上模拟介观行为的能力.
血小板计数与胃癌分期及预后的关系

<正>血常规检查是最简便、最基本的检测方法之一,通过血小板指标观察判断胃癌的病情程度,也不失为一种简便易行的方法。本文通过分析203例胃癌患者血小板计数结果,探讨血小板数量与胃癌的临床病理分期及预后的关系。
The 3D Face Recognition Algorithm Fusing Multi-geometry Features

The 3D face recognition attracts more and more attention because of its insensitivity to the variance of illumination and pose.There are many crucial problems to be solved in this topic,such as 3D face representation and effective multi-feature fusion.In this paper,a novel 3D face recognition algorithm is proposed and its performance is demonstrated on BJUT-3D face database.This algorithm chooses face surface property and the principle component of relative relation matrix as the face representation features. The similarity metric measure for each feature is defined.A feature fusion strategy is proposed.It is a linear weighted strategy based on Fisher linear discriminant analysis.Finally,the presented algorithm is tested on the BJUT-3D face database.It is concluded that the performance of the algorithm and fusion strategy is satisfying.
宫内节育器腹腔异位致绞窄性肠梗阻1例

1病例报告患者,54岁,因腹痛、腹胀、伴肛门停止排气、排便2天,呕吐数10次于2006年12月9日12时入院。入院前2天,无明显诱因出现腹部阵发性绞痛伴腹胀及肛门停止排气、排便,感恶心并呕吐胃内容物数10次,量多,吐后腹痛无缓解。于当地医院就诊,考虑不全性肠梗阻,给予禁食、胃肠减压、补液等处理,病情逐渐加重,伴心动过速、少尿、血压下降等,急诊转入院。既往体健,月经史:14岁初潮,经期45天,周期2830天,47岁绝经。24岁结婚,G4P3+1,顺产3次,人工流产1次。25年前宫内放置金属单环,放置后无不适。
The Design of a 10000 Ampere Impulse Current Generator Using Low Voltage Components

More and more applications of ZnO arrester in electrical system experienced more problems.One thing,that is still under some investigation,is the effect of multiple lightning strike to the performance of ZnO arrester.As we know,the design of ZnO arrester for transmission system and for distribution system differs in the point of view of the number of ZnO blocks.Transmission system,due to its higher nominal voltage than distribution system,has more numbers of ZnO blocks inside an arrester tube.In...更多 term of the current rating of an arrester,it is found that there is some different value of the current rating.The current rating of an arrester installed closer to electrical substation is higher than that of some further away from the substation.To the respond of a lightning impulse strike,the arrester will let a high value of impulse current flowing.It tends to heat the ZnO material of the arrester.If the number of impulse strike is quite high then it may give the effect to the change of the arrester performance.This condition will endanger the equipment that is protected by the arrester from lightning strikes.During this research,the scope of work is limited to making an impulse current generator toward to one having 8/20 μs wave-shape.This kind of impulse current wave-shape is the one that is used for studying the performance of ZnO block.The effect of the inductance and capacitance of the impulse current generator were also studied.A 10 fused cut out was blown by an impulse having 10321 A of 17.8/37.8 μs.A ZnO arrester block brokendown/allowed large value of current :10982 A flowing under the voltage of 10.5 kV.