mlsa-iai-msu-lab/ru_sci_bench_zho_cite_reranking huggingface dataset:
增压泵在冷却水循环系统中的应用

在闭式水冷却循环系统中设计增压泵回路,既可以带走负载焦耳热,又能减小负载由冷却引发的热应力形变.介绍了系统设计,并对系统运行试验数据进行分析,验证了当增压泵回路中冷却水容积达到一定数值时,冷却水热容量能够消减负载进出端温差,达到很好的冷却效果,满足负载对热应力形变的要求
供水管网漏损评价指标筛选与计算实例

通过比较国际水协,世界银行,澳大利亚,葡萄牙以及我国现行的漏损水量评价指标,分析供水管网漏损影响因素,探讨了漏损评价指标的筛选,并举例计算,为我国建立与国际接轨的供水绩效管理评价体系提供技术支持
半集中式分质供排水处理系统的最适规模探讨

在我国生活污水源分离水质特征调研的基础上,建立了半集中式分质供排水和资源化的模型单元,以灰水为例,定量分析不同模型单元的灰水收集,处理和回用的投资和运行费用,确定了半集中式分质供排水处理系统的最佳规模和服务人口.研究结果表明,一个模型单元的灰水收集和回用管网投资费用为4 424元/(m3/d),处理单元投资费用和运行费用分别为3 558~5 224元/(m3/d)和2.18~3.06元/(m3/d);随着模型单元的增加,单位投资费用和运行费用均降低并趋于稳定.综合分析后确定半集中式分质供排水系统的最佳规模为4~8个模型单元,即服务人口当量为5万~10万人,处理水量为3 000~6 000m3/d;投资成本回收期北方地区需6~8a,南方地区则需12a左右
Lignite-Derived Humic Acid Effect on Growth of Wheat Plants in Different Soils

Humic acid (HA), a fairly stable product of decomposed organic matter that consequently accumulates in ecological systems, enhances plant growth by chelating unavailable nutrients and buffering pH. We examined the effect of HA derived from lignite on growth and macronutrient uptake of wheat (Triticum aestivum L.) grown in earthen pots under greenhouse conditions. The soils used in the pot experiment were a calcareous Haplustalf and a non-calcareous Haplustalf collected from Raisalpur and Guliana, respectively, in Punjab Province, Pakistan. The experiment consisted of four treatments with HA levels of 0 (control without HA), 30, 60, and 90 mg kg-1 soil designated as HAo, HA1, HA2, and HA3, respectively. In the treatment without HA (HAo), nitrogen (N), phosphorus (P), and potassium (K) were applied at 200, 100, and 125 mg kg~(-1) soil, respectively. Significant differences among HA levels were recorded for wheat growth (plant height and shoot weight) and N uptake. On an average of both soils, the largest increases in plant height and shoot fresh and dry weights were found with HA2 (60 mg kg~(-1) soil), being 10%, 25%, and 18%, respectively, as compared to the control without HA (HAo). Both soils responded positively towards HA application. The wheat growth and N uptake in the non-calcareous soil were higher than those of the calcareous soil. The HA application significantly inrproved K concentration of the non-calcareous soil and P and NO3-N of the calcareous soil. The highest rate of HA (90 mg kg~(-1) soil) had a negative effect on growth and nutrient uptake of wheat as well as nutrient accumulation in soil, whereas the medium dose of HA (60 mg kg~(-1) soil) was more efficient in promoting wheat growth
Spatio-temporal Changes of ≥10℃ Accumulated Temperature in Northeastern China since 1961

The objective of this study was to provide reliable basis for decision making for national food security and layout and structure adjustment of grain production in the northeastern China. The data of mean daily air temperature of 1961-2009 from 106 meteorological stations in the northeastern China were chosen in this study. Using statistical methods and isoline method, the spatio-temporal changes of various decadal > 10℃ accumulated temperature and the climatic means of > 10℃ accumulated temperature were studied in this paper. The results showed that 1) The geographical distribution of > 10℃ accumulated temperature in the northeastern China could be influenced directly by the latitude, longitude and altitude. If latitude moved one degree northward, the average decrease amplitude of the climatic means was 101.9℃ in the study area. 2) The means of decadal > 10℃ accumulated temperature rose since the 1980s, and their increase amplitudes became larger in the 1990s and the 2010s obviously. Compared with those of the 1980s, > 10℃ accumulated temperature increased by about 100℃ in the mountainous and plain areas in the 1990s; compared with those of the 1990s, > 10℃ accumulated temperature increased by about 200℃ in the Hulun Buir High Plain and the Songnen Plain, and 100℃ in the Sanjiang Plain and the Liaohe Plain in the 2010s. 3) The means of the decadal > 10C accumulated temperature for 106 meteorological stations in the northeastern China increased with the rate of 145.57℃/lOyr in 1961-2009. 4) The climatic means of > 10℃ accumulated temperature increased from 1961-1990 to 1971-2000 and 1981-2009. Compared with the climatic mean of 1971-2000, that of 1981-2009 had increased by above 50℃ in most of the study area, even up to 156℃. Compared with the climatic mean of 1961-1990, that of 1981-2009 increased by above 100℃ in most parts of the study area, even up to 200℃. 5) The maximum northward shift, eastward and westward extension amplitudes of 3100℃, 3300℃ and 3500℃ isolines were larger among all isolines for the climatic means of the three phases. Compared with the positions of the isolines of 1961-1990, those amplitudes of 3100℃ isoline of 1981-2009 were 145 km, 109 km and 64 km, respectively; those of 3300℃ isoline were 154 km, 54 km and 64 km, respectively; and the maximum northward shift of 3500℃ isoline was about 100 km
A Method for Spatial Heterogeneity Evaluation on Landscape Pattern of Farmland Shelterbelt Networks: A Case Study in Midwest of Jilin Province, China

On the basis of landscape ecology, combining the Spot 5 high resolution satellite imagery with GIS, a method evaluating the spatial heterogeneity of shelterbelts distribution at landscape scale is put forward in this paper. The distance coefficients of reasonable and existing landscape indexes of farmland shelterbelt networks were computed, and then through the classification of the distance coefficients, and the establishment of evaluation rules, the spatial heterogeneity of farmland shelterbelts was evaluated. The method can improve the evaluating system of previous studies on shelterbelts distribution, resolve the disadvantages of lacking spatiality of overall evaluation, and make the evaluation results have more directive significance for shelterbelt management. Based on this method, spatial heterogeneity of shelterbelt networks was evaluated in the midwest of Jilin Province, China. The results show that the regions with fewer shelterbelts and no closed network account for 34.7% of the total area, but only 4.9% of the area has relative reasonable pattern of shelterbelt networks. Many problems exist in the distribution pattern of shelterbelts, therefore, much attention should be paid to construct farmland shelterbelts in the study area
脐尿管癌二例

脐尿管(urachus)是膀胱顶部和脐部之间的胚胎期结构,在Retzius间隙内经腹横筋膜和腹膜之间穿过,胎儿出生后逐渐退化成为一条从脐部连到膀胱顶端的纤维索.脐尿管长约5~6 cm,分为膀胱黏膜内段,膀胱肌层壁内段及膀胱上段[1].脐尿管癌(carcinoma of urachus)是一种少见的恶性肿瘤,其发病率占成人肿瘤的0. 01%,占所有膀胱肿瘤的0. 17% ~0. 34%,发病年龄40~70岁,男性多见[2].脐尿管正常时被覆的是移行上皮细胞,但脐尿管癌的组织学绝大多数是腺癌[3],较少的类型为肉瘤,移行细胞癌及鳞状细胞癌
Synthesis of 14-aryl or alkyl-14H-dibenzo[aj]xanthenes promoted by Mg(HSO_4)_2

14-Aryl or alkyl-14H-dibenzo[a,j]xanthenes were prepared by condensation of 2-naphthol and aldehydes in the presence of Mg(HSO4)2 as an efficient, cheap, readily available and eco-friendly catalyst. This procedure has the advantages of high yields, easy work-up, short reaction times, and green conditions
锁定钢板治疗肱骨近端粉碎性骨折26例

锁定加压钢板(locked compression plate, LCP)是一种创造性的内固定器, 通过近几年的临床应用及力学试验, 学者对其使用原则逐渐取得统一. 本科自2006年10月至2009年5月采用锁定钢板治疗肱骨近端粉碎性骨折, 疗效满意
螺旋CT对创伤性颅脑损伤评价的研究进展

创伤性颅脑损伤(traumatic brain inj ury, TBI)是常见的颅脑钝性损伤, CT断层扫描是TBI首选检查方法, 常规检查即能够在早期发现颅骨及颅内不同类型病变, 为神经外科手术干预提供依据. 随着多层螺旋CT(multislice computed tomography, MSCT)技术的发展, 容积扫描已广泛地应用于急诊及TBI检查, 一次扫描即可获得全身各部位多方位和颅骨及颅内病变的三维图像, 有利于对 TBI的系列损伤, 如颅骨骨折整体情况、脑出血和脑挫伤的进展以及TBI与患者预后相关性分析等都能够做出较为全面的评价. 同时, CT灌注成像(computed tomography perfusion, CTP)也在不同类型TBI诊断和预后评价的研究中开始使用~[1-3], 可明确因脑损伤而导致的局部脑血流的变化, 显示脑血流变化与脑水肿和颅内高压等病理进程的关系, 并能够提供有关患者功能恢复的预后信息, 在评价TBI中的价值与优势正逐渐体现. 笔者结合近期文献, 对螺旋CT诊断TBI的相关进展进行阶段性综述
顶空气相色谱法测定替加环素中有机溶剂残留量

目的: 建立替加环素中有机残留溶剂的测定方法. 方法: 采用顶空一气相色谱法测定替加环素中有机溶剂的残留量--甲醇、二氯甲烷和乙腈. 结果: 各组分在线性范围内呈良好线性关系, 各组分检出量均符合中国药典的规定. 结论: 该方法简便可行, 重复性好, 结果可靠
抗肿瘤药物11030例处方分析

目的: 了解抗肿瘤药临床应用现状, 以提高抗肿瘤药合理用药水平. 方法: 依据药品法定说明书及相关药学资料, 对辽宁省肿瘤医院静脉配置抗肿瘤药物处方进行统计分析. 结果: 在静脉配置抗肿瘤药物11030张处方中, 存在不合理用药问题的处方达285张, 占2.3%. 医嘱中选用不合理溶媒占不合理用药处方的42%, 给药浓度不合理占34%, 溶媒用量不合理14%, 给药剂量不合理占9%, 给药方式不合理占1%. 结论: 临床用药确实存在不合理情况. 加强医生对用药知识的了解和临床药师的复核与把关, 建立合理用药规范, 对提高全院的合理用药水平有重要意义
北京22家医院4年门诊和住院患者肠内营养用药动态分析

目的探讨北京地区肠内营养患者的用药情况和趋势,并对肠内营养药物进行分析.方法采用《医院处方分析》课题中北京地区22家医院20052008年门诊和住院患者肠内营养用药的处方数据,以限定日剂量(DDD),用药人次(DDDs),零售金额(万元),日用药金额(元)为统计指标,对应用情况进行初步统计和分析.结果 2005~2008年北京地区肠内用药销售金额和用药频度呈逐年上升趋势,22家医院中应用过肠内营养用药的科室有65个.结论 2005~2007年为肠内营养用药快速增长期,2008年肠内营养用药进入平稳发展期
原小檗碱类化合物合成研究的新进展

目的综述原小檗碱类化合物合成研究的新进展,为开展该类化合物的结构改造提供方法参考.方法依据近十年来国内外文献进行分析,归纳,总结并进行评述.结果与结论原小檗碱类化合物具有广泛的药理活性,其化学结构也有其特殊性,可以看作是由2个异喹啉母核组合构成的4个六元环体系.其中环上氢化程度的改变还会影响整个分子的空间构象,从而影响化合物的药理活性.因此,这类化合物的合成已经成为许多药物化学工作者研究的主要内容之一.其母核的构建研究涵盖传统的异喹啉合成方法及其改进策略,如皮克太特-斯彭格勒反应,毕史勒-那皮拉斯开反应等,以及新颖的C-C键连接方式,如亲核加成环化反应,自由基反应,傅克烷基化反应,钯催化的C-C键偶联反应,环加成反应等.所有这些方法都为我们开展该类化合物的结构改造研究提供了强有力的工具,相信以这些合成方法为基础,该领域的研究者一定能够早日开发出具有新颖结构的原小檗碱类药物先导化合物
鼻腔嗜酸细胞腺瘤1例

嗜酸细胞腺瘤好发于唾液腺,甲状腺,泪腺,胰腺等脏器,发生于鼻腔者极为少见,近年来,随着对本病的临床病理特征认识加深,文献报告成倍增加.病理特征:切面呈淡红褐色,部分肿瘤中央有纤维瘢痕灶形成,瘢痕灶呈不规则淡白色或放射状.光镜下瘤细胞呈巢状或器官样,少数可出现腺泡状.细胞质嗜酸,颗粒丰富,核圆形,部分肿瘤细胞可出现异型性,甚至瘤巨细胞.长期以来认为嗜酸细胞腺瘤的生物学行为系一种潜在恶性肿瘤.根据肿瘤细胞的组织形态将其分为Ⅲ级,提出了嗜酸细胞腺瘤出现核不典型性时应考虑潜在恶性,也有报告该肿瘤发生转移的病例.鉴别诊断主要是与嗜酸细胞癌鉴别,后者肿瘤细胞异型性明显,核分裂像多见,常呈浸润性生长
益气生血汤防治乳腺癌化疗期间骨髓抑制35例

化疗是治疗乳腺癌的主要方法之一,骨髓抑制是化疗的最主要副作用,患者常因骨髓抑制而导致化疗推迟. 临床常用粒细胞刺激因子来对抗骨髓抑制,但是其本身具有较多副作用,过多的使用会给患者增加痛苦. 我们在围化疗期采用自拟方益气生血汤口服作为防治措施,现将结果报道如下
<<黄帝内经>>的方法论

论及<<黄帝内经>>方法论的意义和12种方法. 即观察法、实验方法、调查方法、经学方法、比类方法、揆度方法、术数方法、模型方法、假说方法、系统方法、从容模式思维方法、案例分析方法等
中医治疗老年肺癌的思路与方法

通过分析国内外老年肺癌的研究成果,总结出老年肺癌的临床特点,指出中医药治疗老年肺癌的作用,提出单纯中医治疗、中医联合单药或含铂化疗、中医联合放疗、中药巩固治疗等老年肺癌中医治疗方法. 提示临床医生应熟悉老年肺癌人群特点,治疗以守为主,以攻为辅,在掌握规范化治疗基础上,根据病情变化不断调整个体化的治疗方案,以实现减轻患者痛苦,延长生存时间的目的
铅对原代培养大鼠海马细胞周期阻断作用

低水平的慢性铅暴露对婴幼儿脑中枢神经系统不可逆的损害以及对学习记忆能力的影响是一个备受关注的问题. 海马是铅脑损害的主要靶区,是大脑学习和记忆的关键部位(1]. 海马长时程增强(long term potentiation, LTP)由于本身具有协同性、联合性、特异性等特点,使它成为信息储存和记忆的细胞机制(2]. 本研究通过检测铅对原代培养海马神经细胞的细胞周期阻断情况与细胞周期蛋白cyclinD1表达的相关性,进一步探讨铅的神经毒理作用机制
江苏省流动育龄妇女生育行为调查

江苏省是中国长江三角地区经济发达省份之一,近年来流动人口以15%的速度增长, 2008年流动人口已达1 800万,跨省流入的育龄人口数量居全国第三〔1〕.流动人口中的妇女以青壮年劳动力为主,处于生育旺盛期,给人口管理工作带来巨大挑战.为了解江苏省流动妇女的生育行为,探讨流动妇女生育模式及其特点,为改善流动人口生殖健康状况,提高人口计生服务质量提供依据,于2007年4-8月对江苏省1 562名流动妇女的生育行为进行调查.结果报告如下
Semisolid microstructure evolution of AZ91D alloy under high shear rate

Experimental work was undertaken to investigate the effect of rotation speed on the solidification microstructure of AZ91D alloy using a twin-screw slurry maker. Then numerical simulation was used to investigate the effect of rotation speed on the flow filed and temperature field of the melt. It was found that increasing the rotation speed could give rise to substantial grain refinement, which can be attributed to the increase of effective nucleation rate caused by the extremely uniform temperature and dispersing any potential clusters of nucleation agents in the bulk liquid under dispersive mixing
Electromagnetic and microwave absorbing properties of W-type barium ferrite doped with Gd~(3+)

W-type barium ferrites doped with Gd~(3+), Ba_(1-x)Gd_x(Zn~(0.3)Co_(0.7))_2Fe_(16)0_(27) (x = 0, 0.05, 0.10, 0.15, 0.20), were prepared by a sol-gel method. The effects of Gd~(3+) substitution on their microstructure, electromagnetic properties and microwave absorptive behavior were analyzed. The XRD patterns showed the single phase of W-type barium ferrite when x ≤ 0.15. Microwave electromagnetic properties of samples were studied at the frequency range from 2 GHz to 18 GHz using a network analyzer (Agilent 8722ET). The complex permittivity ε (ε', ε') increased gradually when x ≤ 0.10, but it decreased as x = 0.15. The real permeability (μ') decreased with the increase of Gd~(3+) content, while the imaginary permeability (μ) increased when x ≤ 0.10. All these reasons were discussed using the electromagnetic theory. Furthermore, the ferrite-epoxy compound coating materials with 80 wt.% of Ba_(0.9)Gd_(0.1)(Zn_(0.3)Co_(0.7))_2Fe_(16)O_(27)were prepared to measure the microwave absorbing properties. The maximum of reflection loss (RL) reached about -27 dB and RL was below -10 dB in the frequency range of 8-18 GHz when the thickness was 1.92 mm
Analysis and Application of the Singularity Locus of the Stewart Platform

The direct use of the determinant of Jacobian matrix being equal to zero for the singularity analysis is generally difficult which is due to complexity of the Jacobian matrix of 6-DOF parallel manipulators, especially for Stewart platform. Recently, several scholars make their great contribution to the effective solution of this problem, but neither of them find the right answer. This paper gives a brief analysis of the kinematics of the Stewart platform and derives the Jacobian matrices of the system through the velocity equation. On the basis of the traditional classification of singularities, the second type of singularity is investigated. An assumption of any three of the six variables of the Stewart platform as constant is made, then the analytical expression of singularity locus equation of the second type singularity which contains another three pose variables is obtained. The singularity locus is represented in the three-dimensional space through the derived equation. The correctness and validity of the proposed method are verified through examples. Finally, the singularity analysis of an electric Stewart platform in its desired workspace and reachable workspace is implemented. Thus, one can easily identify whether singularity exists in a given workspace of a Stewart platform and determine whether the existed singularity can be avoided through the proposed method. The proposed method also provides theoretical principle for the design and application of the Stewart platform and has great significance for the trajectory planning and control
浅谈国家自然科学基金资助项目申请书立项依据的撰写

根据我校2006--2010年申请国家自然科学基金落选的主要原因一一立项依据不足的实际情况, 本文从总结落选申请书"立项依据不足"的表现人手, 浅谈医学科学领域国家自然科学基金面上项目和青年科学基金项目申请书立项依据的撰写问题
科学家称"砷基生命"不宜炒作

12月2日,NASA召开新闻发布会,其天体生物科学家Felisa Wolfe-Simon领导的团队宣布了一项声称改变生物学教科书的发现:他们发现了"砷基微生物"GFAJ-1.GFAJ-1能在不含磷元素的培养基上,利用砷元素生长.Wolfe-Simon企图以此说明"磷作为生命必须元素"的经典认知将被颠覆,然而其他科学家并不买账
输尿管镜下处理尿管滞留一例报告

尿管因质量问题或其他原因发生滞留临床较常见. 常用处理办法包括: ①注水涨破气囊. ②细钢丝疏通气囊通道. ③B超引导下经会阴或经膀胱细针刺破气囊. ④剪断气囊通道, 希望其自行缓慢排出囊内液体. 涨破气囊可造成膀胱损伤或气囊残片残留于膀胱内. B超引导下穿刺气囊亦为: 有创治疗, 有时因气囊活动不易成功. 输尿管镜直视下进镜一般较容易, 用输尿管导丝内芯可轻易刺破气囊. 此方法简便、易行、创伤小, 可有效避免临床纠纷
脆骨-蓝色巩膜综合征一家系报告

脆骨-蓝色巩膜综合征也叫Van Der Hoeve综合征,是一组常染色体显性遗传病.1917年Van Der Hoeve首次将蓝色巩膜,骨质脆弱易折,传导性耳聋三大症状联系起来,确立为一个独立的综合征,故此得名.其发病机制可能与Ⅰ型胶原基因突变导致先天性间质组织和结缔组织发育不良有关.该病发病率极低, Byers等统计其患病率为1/30 000~1/10 000.我院收治一女性患者,其家族4代7人患病,现报告如下
三江源地区鼠疫流行风险因素及防治对策

鼠疫是在一定的地理景观条件下.以啮齿动物为贮存宿主, 以蚤类为传播媒介, 由鼠疫耶尔森菌 .(yersinia pestis, 以下简称鼠疫菌)引起的自然疫源性疾病, 是<<中华人民共和国传染病防治法>>中规定的甲类传染病. 自20世纪80年代后期, 鼠疫在世界范围内重新进入一个活跃期, 被世界卫生组织列为重新流行的传染病之一
追求卓越 创办精品

岁尾,我们总结了过去;年初,我们又在策划未来.但思考的还是那个永恒的主题——《农业机械学报》的质量和发展.回顾过去,《农业机械学报》有了长足的进步.她作为国内有重要影响的农机类权威期刊,追求卓越和精品
COMPUTATIONAL ISSUES IN SENSITIVITY ANALYSIS FOR 1-D INTERFACE PROBLEMS

This paper is concerned with the construction of accurate and efficient computational algorithms for the numerical approximation of sensitivities with respect to a parameter dependent interface location. Motivated by sensitivity analysis with respect to piezoelectric actuator placement on an Euler-Bernoulli beam, this work illustrates the key concepts related to sensitivity equation formulation for interface problems where the parameter of interest determines the location of the interface. A fourth order model problem is considered, and a homogenization procedure for sensitivity computation is constructed using standard finite element methods. Numerical results show that proper formulation and approximation of the sensitivity interface conditions is critical to obtaining convergent numerical sensitivity approximations. A second order elliptic interface model problem is also mentioned, and the homogenization procedure is outlined briefly for this model. Mathematics subject classification: 65N06, 65B99
A PRIORI ERROR ESTIMATES OF A COMBINED MIXED FINITE ELEMENT AND DISCONTINUOUS GALERKIN METHOD FOR COMPRESSIBLE MISCIBLE DISPLACEMENT WITH MOLECULAR DIFFUSION AND DISPERSION

A combined approximation for a kind of compressible miscible displacement problems including molecular diffusion and dispersion in porous media is studied. Mixed finite element method is applied to the flow equation, and the transport one is solved by the symmetric interior penalty discontinuous Galerkin method (SIPG). To avoid the inconvenience of the cut-off operator in [3,21], some induction hypotheses different from the ones in [6] are used. Based on interpolation projection properties, a priori hp error estimates are obtained. Comparing with the existing error analysis that only deals with the diffusion case, the current work is more complicated and more significant. Mathematics subject classification: 65M12, 65M60
一株埃可病毒25型河南分离株全基因特征分析

埃可病毒25型(Ech025)是一种常见的肠道病毒, 2008年河南省从病毒性脑炎患者脑脊液中分离出4株Ech025. 鉴于目前除原型株JV-4外, 尚未有Ech025全基因序列的测定, 为了解其基因特征, 本研究对其中1株进行全基因组序列测定
胰腺移植术后抗凝治疗41例

除去免疫因素外, 胰腺移植术后早期静脉血栓形成是造成移植物功能丧失最主要的原因, 其发生率为3％~ 10%[1]. 目前术后多采用小剂量肝素抗凝预防静脉血栓, 但肝素抗凝会增加出血的风险[1,2]. 本中心1999年12月至 2010年1月共为41例患者施行胰腺移植术, 现将患者术后抗凝方案报告如下
Quasinormal Modes of Phantom Scalar Perturbation in Background of Reissner-Nordstrom Black Hole

We have investigated the quasinormal modes (QNMs) of phantom scalar perturbation in a Reissner-Nordstrom (RN) background. We find that the dependence of QNMs on the mass of the field for the phantom perturbation is totally different from that of usual massive perturbation. However, we obtain the same critical value of the overtone number for an angular quantum number from which the mass will begin to have a reverse effect on the real part of QNM frequencies and the perturbation-independent relation between the QNMs and the second order thermodynamic phase transition
Resonances-Excitation Calculation Studies Investigation of A(3, 3) in Ground State of ~(90)Zr Cold Finite Heavy Nucleus at Equilibrium and Under Large Compression

A non-relativistic microscopic mean field theory of finite nuclei is investigated where the nucleus is described as a collection of nucleons and delta resonances. The ground state properties of ~(90)Zr nucleus have been investigated at equilibrium and large amplitude compression using a realistic effective baryon-baryon Hamiltonian based on Reid Soft Core (RSC) potential. The sensitivity of the ground state properties is studied, such as binding energy, nuclear radius, radial density distribution, and single particle energies to the degree of compression. It is found that the most of increasing in the nuclear energy generated under compression is used to create the massive A particles. For 90Zr nucleus under compression at 2.5 times density of the normal nuclear density, the excited nucleons to △'s are increased sharply up to 14% of the total number of constituents. This result is consistent with the values extracted from relativistic heavy-ion collisions. The single particle energy levels are calculated and their behaviors under compression are examined too. A good agreement between results with effective Hamiltonian and the phenomenological shell model for the low lying single-particle spectra is obtained. A considerable reduction in compressibility for the nucleus, and softening of the equation of state with the inclusion of the A's in the nuclear dynamics are suggested by the results
Proteomics and the genetics of sperm chromatin condensation

Spermatogenesis involves extremely marked cellular, genetic and chromatin changes resulting in the generation of the highly specialized sperm cell. Proteomics allows the identification of the proteins that compose the spermatogenic cells and the study of their function. The recent developments in mass spectrometry (MS) have markedly increased the throughput to identify and to study the sperm proteins. Catalogs of thousands of testis and spermatozoan proteins in human and different model species are becoming available, setting up the basis for subsequent research, diagnostic applications and possibly the future development of specific treatments. The present review intends to summarize the key genetic and chromatin changes at the different stages of spermatogenesis and in the mature sperm cell and to comment on the presently available proteomic studies
脊髓型颈椎病MRI T2WI高信号与患者手术预后关系的Meta分析

脊髓型颈椎病(cervical spondylotic myelopathy, CSM)是一种退行性疾病, 常伴有脊髓损害. Takahashi等[1]首先描述了CSM患者MRI上T2加权像(T2weighted images, T2WI)可出现脊髓高信号的现象, 并认为这种高信号与患者的预后密切相关. 但CSM患者 MRI T2WI上出现脊髓高信号是否对患者的预后存在影响, 目前仍存在较大争议. 笔者收集了关于T2WI脊髓高信号与术后JOA评分改善率的队列研究, 对T2WI脊髓高信号是否与患者预后相关进行Meta分析
自然周期不成熟卵体外培养治疗卵巢早衰获妊娠分娩一例报告及分析

总之, 对于POF寻求生育治疗的妇女, 制定个性化治疗方案非常重要. 对于POF不孕患者不应放弃, 一旦发现优势卵泡及时应用辅助生殖技术帮助患者妊娠, 以便在患者卵巢功能完全衰竭之前及早采用辅助生殖技术帮助患者获得妊娠和分娩
Optical Characteristics of La-Doped ZnS Thin Films Prepared by Chemical Bath Deposition

Undoped and La-doped ZnS thin films are prepared by chemical bath deposition (CBD) process through the co-precipitation reaction of inorganic precursors zinc sulfate, thiosulfate ammonia and La203. Composition of the films is analyzed using an energy-dispersive x-ray spectroscopy (EDS). Absorption spectra and spectral transmittances of the films are measured using a double beam UV-VIS spectrophotometer (TU-1901). It is found that significant red shifts in absorption spectra and decrease in absorptivity are obtained with increasing lanthanum. Moreover, optical transmittance is increased as La is doped, with a transmittance of more than 80% for wavelength above 360nm in La-doped ZnS thin films. Compared to pure ZnS, the band gap decreases and fiat-band potential positively shifts to quasi-metal for the La-doped ZnS. These results indicate that La-doped ZnS thin films could be valuably adopted as transparent electrodes
Electronic Non-Resonant Tunneling through Diaminoacenes: A First-Principles Investigation

The electron transport through diaminoacenes sandwiched between two Au electrodes is simulated by using a first-principles analysis. The nonlinear current-voltage characteristic is observed. Effects of the ring number and positions of amine groups on equilibrium transport properties are found. For 1,4 series, the greater the number of the rings, the stronger the transmission spectrum near the Fermi energy. For 2,6 series, the larger the number of the rings, the weaker the transmission spectrum near the Fermi energy. This is helpful for understanding the recently reported results on conductance measurements using amines
Polarization Mechanism of Oxygen Vacancy and Its Influence on Dielectric Properties in ZnO

We report on the mechanism of the dielectric properties of oxygen vacancy in ZnO, using ab initio numerical simulations of oxygen vacancy on the band structure and dielectric properties, to develop photoelectric material applications. It is revealed that the appearance of oxygen vacancies leads to wider energy band gap, obvious blue shift and increase in the peak of dielectric function as compared to the intrinsic ZnO simulation. We explain these unusual phenomena and analyze the dielectric changes with the mechanism of polarization in the semiconductors. It is shown that the main mechanism of influencing dielectric properties is the electron displacement polarization. The result may be helpful for development of photoelectric materials
基金迎来变革,抓住转型机遇一国家自然科学基金2010年半导体科学领域申请项目概况分析

2011年度基金资助形式将有较大变化,面上项目资助期限将改为四年,平均资助强度将达到60多万元,重点项目资助期限改为五年,资助强度达300万元,敬请各位申请人认真阅读基金项目指南,或咨询单位科研管理部门,以了解详细情况.2010年度半导体科学领域申请项目数维持了稳步增长的势头,半导体晶体与薄膜材料、集成电路设计与测试、半导体光电子器件申请项目数仍然比较集中,近两年来一直处于半导体学科前列.半导体光电子器件、半导体电子器件和新型信息器件申请项目数比2009年度有明显增长,而半导体物理申请项目数稍有下降.由于我们倡导大家关注器件制备和基础工艺中的关键科学问题,2010年针对这方面的研究有所提升,今后若干年内我们仍将引导大家加强这方面的研究,在评审过程和资助结果中也必将会有所体现.本文简述了2010年半导体科学领域基金申请与资助概况,分析近期动态及学科对策,并附2010年半导体科学领域资助的项目清单,供有关科技工作者参考