mlsa-iai-msu-lab/ru_sci_bench_zho_cite_reranking huggingface dataset:
Analytical Model of Doppler Spectra of Light Backscattered from Rotating Convex Bodies of Revolution in the Global Cartesian Coordinate System

We present an analytical model of Doppler spectra in backscattering from arbitrary rough convex bodies of revolution rotating around their axes in the global Cartesian coordinate system.This analytical model is applied to analyse Doppler spectra in backscatter from two cones and two cylinders,as well as two ellipsoids of revolution.We numerically analyse the influences of attitude and geometry size of objects on Doppler spectra.The analytical model can give contribution of the surface roughness,attitude and geometry size of convex bodies of revolution to Doppler spectra and may contribute to laser Doppler velocimetry as well as ladar applications.
Ultrafast Electron Diffraction with Spatiotemporal Resolution of Atomic Motion

Ultrafast electron diffraction(UED)is a rapidly advancing technique capable of recording the atomic-detail structural dynamics in real time.We report the establishment of the first UED system in China.Employing this UED apparatus,both the coherent and the concurrent thermal lattice motions in an aluminium thin-film,trigged by ultrafast laser heating,have been observed.These results demonstrate its ability to directly measure a sub-milli-angstrom lattice spacing change on a sub-picosecond time scale.
Effects of Intrinsic Decoherence on Information Transport in a Spin Chain

Considering Milburn's intrinsic decoherence effect on quantum communication through a spin chain,we show that the transfer quality for quantum state and entanglement will obviously decrease with the increasing intrinsic decoherence rate.Some odd chains are much higher than even ones for the state transfer efficiency.The state transfer of a long chain is very sensitive to the intrinsic decoherence,which turns out to be an obstacle for information transport.
Simulating Entangling Unitary Operator Using Non-maximally Entangled States

We use non-maximally entangled states(NMESs)to simulate an entangling unitary operator(EUO)w/th a certain probability.Given entanglement resources,the probability of the success we achieve is a decreasing function of the parameters of the EUO.Given an EUO,for certain entanglement resources the result is optimal,i.e.,the probability obtains a maximal value,and for optimal result higher parameters of the EUO match more amount of entanglement resources.The probability of the success we achieve is higher than the known results under some condition.
Controlling the motion of solitons in BEC by a weakly periodic potential

By developing multiple-scale method combined with Wentzel-Kramer-Brillouin expansion,this paper analytically studies the modulating effect of weakly periodic potential on the dynamical properties of the Bose-Einstein condensates (BEC) trapped in harmonic magnetic traps.A black-grey soliton transition is observed in the BEC trapped in harmonic magnetic potential,due to the weakly periodic potential modulating effect.Meanwhile,it finds that with the slight increase of the weakly periodic potential strength,the velocity of the soliton decreases,while its width firstly decreases then increases,a minimum exists there.These results show that the amplitude,velocity,and width of matter solitons can be effectively managed by means of a weakly periodic potential.
Effects of time delay on stochastic resonance of a periodically driven linear system with multiplicative and periodically modulated additive white noises

Stochastic resonance (SR) of a periodically driven time-delayed linear system with multiplicative white noise and periodically modulated additive white noise is investigated.In the condition of small delay time,an approximate analytical expression of output signal-to-noise ratio (SNR) is obtained.The analytical results indicate that (1) there exists a resonance peak in the curve for SNR versus time delay; (2) the time delay will suspend the SR dramatically for SNR versus other parameters of the system,such as noise intensity,correlation intensity,and signal frequency,once a certain value is reached,the SR phenomenon disappears.
Grain size reduction of copper subjected to repetitive uniaxial compression combined with accumulative fold

This paper reports a novel method of repetitive uniaxial compression combined with accumulative fold for preparing bulk submicron- to nanocrystalline copper starting with a coarse grained counterpart. Grain size reduction and microstrain variations of the high purity copper samples after different passes of compression and fold are investigated by scanning electron microscope and x-ray diffraction (XRD), respectively. Our results show that the average grain size of samples decreases from about 830nm to 127 nm as the number of compression passes increases to 30. Microstrain in the compressed sample is found to increase for the first 20 passes, but to decrease at the last 10 passes. The variations of compressive yield strength and the shift of XRD peaks to larger diffraction angles are observed in the squeezed sample. Our experimental results demonstrate that the repetitive uniaxial compression combined with accumulative fold is an effective method to prepare bulk nanocrystalline metallic materials, in particular for soft metals such as Cu, Al and Pb.
Fano-Kondo effect in the T-shaped double quantum dots coupled to ferromagnetic leads

Using an equation-of-motion technique, we theoretically study the Fano-Kondo effect in the T-shaped double quantum dots coupled to two ferromagnetic leads by the Anderson Hamiltonian. We calculate the density of states in this system with both parallel and antiparallel lead-polarization alignments, and our results reveal that the interdot coupling, the spin-polarized strength and the energy level of the side coupled quantum dot greatly influence the density of states of the central quantum dot. This system is a possible candidate for spin valve transistors and may have potential applications in the spintronies.
Some new solutions derived from the nonlinear (2+1)-dimensional Toda equation an efficient method of creating solutions

This paper presents a new and efficient approach for constructing exact solutions to nonlinear differential-difference equations (NLDDEs) and lattice equation. By using this method via symbolic computation system MAPLE, we obtained abundant soliton-like and/or period-form solutions to the (2+1)-dimensional Toda equation. It seems that solitary wave solutions are merely special cases in one family. Furthermore, the method can also be applied to other nonlinear differential-difference equations.
2008/2009年度冬季气候对农业生产的影响

2008/2009年度冬季(2008年12月-2009年2月),全国大部地区平均气温明显偏高,光照基本适宜,利于大部地区越冬作物的安全越冬和生长发育.北方部分冬麦区发生农业干旱,但冬小麦越冬基本未受到影响,仅黄淮西部部分未冬灌的冬小麦受到一定不利影响;2月份几次大范围明显降水过程有效缓解了北方冬麦区的旱情,对冬小麦安全越冬、苗情转化升级和返青生长十分有利.2月中旬后期-3月初,长江中下游地区出现大范围持续阴雨天气,致使部分地区油菜等作物生长发育迟缓,长势偏弱.冬季中前期,寒潮天气和阶段性低温影响,对部分地区冬小麦、油菜等越冬作物生长发育不利,但总体影响不大.
TTF、TCNQ及电荷转移复合物TTF-TCNQ在Au(111)表面吸附的ECSTM研究

研究发现当电极电位处于双层区时,三种分子在Au(111)电极表面均可形成高度有序的吸附结构.TTF与TCNQ分子有序吸附层的单胞结构分别为(6×3)和(4×7),如图1中的模型所示,分子均是以平躺的方式吸附在Au(111)电极表面.而当电极电位向负方向移至0.08 V(RHE)时,TCNQ分子的吸附结构发生了相转变,形成了一种单胞为(33~(1/3)×12)的新型结构.这是由于在较负的电位下,TCNQ分子与金电极之间的作用减弱,而相邻分子之间的排斥作用占据主导地位,使得相邻分子间的角度由原来的60°增大至90°,单胞结构发生了相应的改变.电荷转移复合物TTF-TCNQ在Au(111)表面则构筑了层状吸附结构,而且分子不再以平躺形式进行吸附,而是采取肩并肩站立的方式堆积成有序结构,与单纯两种分子在吸附结构和吸附方式上均不相同,如图2所示.此时π-π堆积作用在分子的组装过程中占据主导地位,该堆积方式与TTF-TCNQ单晶和薄膜的结构具有一定的相似性.
1965～2005年西北太平洋边缘海区海面变化记录的ENSO信号及其时空分异特征

海面变化记录中隐含着全球和区域变化的重要信息,对这些信号的分离、提取并揭示其变化特征,是深入理解海面变化机制的前提和基础.基于西北太平洋边缘海区10个验潮站1965～2005年月均验潮序列,利用二阶统计量盲源识别(SOBI)方法进行信号分离,结合EMD方法提取海面变化记录中ENSO信号,进而应用小波分析方法探讨了ENSO信号的时空分异特征.结果表明:各站位验潮序列记录了不同类型、不同强度ENSO事件,并表现出显著的时空分异特征,低纬海面对ENSO的响应明显较中高纬强烈;受洋流、地形等要素影响,海面变化对ENSO事件的记录存在型变;海面变化同样揭示了ENSO事件的尺度变化特征,自20世纪80年代以来,坎门以南各站位对ENSO的响应显著增强,其尺度从4年左右逐渐扩展到2～8年,反映了ENSO强度及频率的变化;海面变化记录的强ENSO事件发生前后,在特定尺度上出现相位的反向变化,支持了强ENSO事件的发生可能与尺度间相互耦合与叠加有关的研究结论.
高寒草甸土壤组分碳氮含量及草甸退化对组分碳氮的影响

以青海省果洛州达日县原生高寒嵩草(Kobresia)草甸封育系统和重度退化草甸为对象,通过密度分组技术将每个土样分为2个组分:轻组和重组,分别分析每个组分的有机碳和全氮浓度,研究高寒原生嵩草草甸土壤密度组分碳氮数量和性质、检验高寒草甸退化对土壤轻组和重组中碳氮含量的相对影响程度;研究结果如下:(1)高寒嵩草草甸原生植被土壤表层重组和轻组的碳浓度分别为3.84%和28.63%,氮浓度分别为0.362%和1.192%,重组中C:N为10.60而轻组中的碳氮比为23.80;(2)从各组分中有机碳占全土有机碳的比例看,重组中的有机碳占明显优势;随土壤深度的增加,重组碳的比例由78.95%(0～10 cm)上升到90.33%而轻组碳的比例由21.05%(0～10 cm)下降到9.68%;(3)高寒草甸严重退化导致表层土总有机碳由47.47 g·kg~(-1)下降到17.63g·kg~(-1),其中重组碳含量由37.31 g·kg~(-1)下降到16.01 g·kg~(-1),轻组碳含量由10.01 g·kg~(-1)下降到1.62 g·kg~(-1),即按照土壤组分碳氮含量计算,重组碳流失了57%,轻组碳流失了84%;同时重组氮流失了43%,轻组氮流失了79%;(4)轻组中碳氮流失的主要原因不是由于草甸退化导致轻组本身碳氮浓度降低,而是由于土壤中轻组绝对数量降低导致的.重组中氮的流失远低于碳的流失,这可能暗示重组在保护氮的方式上与有机碳存在区别.
华南上特马道克阶的笔石带序列及其全球对比

特马道克阶是奥陶系的第一个阶,阶内通常采用二分方案,其中上特马道克阶的时间跨度约为8 Ma.笔石是上特马道克阶高分辨率地层划分与对比的重要类群,相对完整的笔石带序列已在斯堪的纳维亚、北美和南美建立.华南上特马道克阶的笔石地层相当发育,但是已知笔石带序列既不完整,也难以进行国际对比.近年来,通过对湖南省益阳市南坝剖面中笔石标本的不间断采集,在Tetragraptus approximatus带之下识别出4个上特马道克阶笔石带(由上而下):Hunnegraptus copiosus带、Araneograptus murrayi带、Aorograptus victoriae带和Adelograptus tenellus带.这是中国迄今为止所发现的最完整的、可以进行全球对比的上特马道克阶笔石带序列.因此,本研究填补了中国上特马道克阶笔石带的空白,提高了中国上特马道克阶笔石生物地层划分和对比的精度.
2008年5月12日M_w7.9汶川地震导致的周边断层应力变化

2008年5月12日,四川龙门山断裂发生M_w7.9强烈地震,导致重大的人员伤亡和经济损失.据预测,汶川地震余震将持续至少1年,并且不排除发生强余震可能.因此,判断余震可能发生区域,圈定震区周边未来可能发生地震活动的范围,对灾区人员安置、灾后恢复重建以及加强震灾及次生灾害防御具有重要的参考价值.同时,汶川地震及邻区地震活动性为将来研究板内逆冲型地震的同震应力变化,并检验地震的应力触发作用提供了一个非常难得的机会.根据地震的静态触发原理,利用弹性位错理论和分层地壳模型计算了汶川地震引起的周边断层同震应力变化,分析了汶川地震对龙门山及周边各主要活动断层地震活动性的作用和影响.结果表明,汶川地震增加了鲜水河断裂(道孚-康定段)、东昆仑断裂(玛曲-南坪段)、青川断裂、岷江断裂南端以及彭县-灌县断裂、江油-广元断裂、江油-灌县断裂上库仑应力的积累,将提升这些断层上地震发生的概率.由于这些地区人口密集,应加强这些地区的地震监测和灾害预警.青川断裂上记录到的余震表明主震已经触发了该断层的地震活动,余震有向该区迁移的趋势,应密切关注地震向北迁移的态势.彭县-灌县断裂、北川.映秀断裂南段目前发生的余震很少,所积累的构造应力未充分释放,同震库仑应力的加载有可能在今后触发该区较强余震,应对该区实施重点监测.汶川地震有效降低了抚边河断裂、虎牙断裂、哈南.青山湾断裂、龙泉山断裂以及迭部-白龙江断裂上库仑应力的积累,这些区域的地震发生概率将因库仑应力减小而降低.汉中一带、西秦岭北缘断裂上库仑应力变化微小,汶川地震的静态触发效应不足波及此处.
儿童肘关节骨折手术后的综合康复治疗方法的疗效分析

@@ 肘关节骨折是临床较常见的疾病.资料显示每年每100,000人中,肘关节骨折的发生人数为1.5人[1],由于肘关节的解剖特性,损伤后常造成功能障碍,如何最大限度恢复患者肘关节功能,提高生存质量,已逐渐受到重视.本文就我科自2003年来收治儿童肘关节骨折手术后患者19例进行回顾性分析.
Coloring night vision imagery for depth perception

Depth perception for night vision(NV)imagery could largely improve scene comprehension.We present a novel scheme to give fused multi-band NV imagery smoothly natural color appearance as well as depth sense from color.Our approach is based on simulating color cues by varying saturation values of each object in the color NV image,in correspondence with the ratio between the infrared and low-light-level sensor outputs which in practice is the depth feature for same materials.We render the NV image segment-by-segment by taking advantage of image segmentation,dominant color transfer,saturation variation,and image fusion.Experiments have shown that the proposed scheme can achieve satisfying results.
Are the fish of the upper and lower Mekong interconnected?

The Mekong supports one of the richest inland fisheries in the world, with many of the fish migrating long distance to spawn. Little is known about the fisheries and migration strategies of the Upper Mekong whilst it is supposed that many fish species move between the Lower and Upper Mekong. Most likely, natural fish migration in the fiver has been altered by dam construction across the mainstream of the Upper Mekong. In this paper, the interconnectivity of fish species between different sections of the Mekong and negative impacts of dams on migratory fish are studied. Of the 162 fish species in the Upper Mekong and the 869 species in the Lower Mekong, 61 species are common. Results show that there is no significant difference at order level between the UM and LM. Similarity coefficients are used to evaluate interconnectivity at species, genus and family levels among four different sections of the Upper Mekong with each other and with the Lower Mekong as a whole. The highest similarity is found between the middle and lower reach of the Upper Mekong at species and genus levels and the middle and upper reach at family level. Of the eight cascade dams, Mengsong Dam in planning is considered as the biggest threat to migratory fish from the Lower Mekong and should be particularly concerned.
Formation and early development of tetraspores of Polysiphonia urceolata (Rhodomelaceae, Rhodophyta)

Polysiphonia urceolata is one type of potential commercial red seaweeds used for breeding and cultivation, because of its significant biochemical and biomedical application. However, the information of breeding and seedling incubation for cultivation is limited, especially the early development. In this study, tetrasporohyte and gametophyte of P. urceolata were taken as the study materials in Huiquan Bay, Qingdao, China. The cleaned and sterilized tetrasporophytes and gametophytes were pre-cultured in sterilized seawater, then nurtured at 18℃, 25 μmol photons m-2 s~(-1) in 12:12 h (light:dark) photoperiod. Continuous observation under microscope showed that the early development consists of bipolar division stage and seedling stage. In the division stage, tetraspores germinate into bipolar sporelings that further differentiate into a colorless rhizoidal portion and a lightly pigmented upright shoot. The lightly pigmented rhizoidal cell develops to a rhizoid and the larger pigmented cell transforms to an erect axis. In the seedling stage, several quasi-protuberances appear on the erect axis and form juvenile seedlings. The results demonstrate the culture of P. urceolata from tetraspores under laboratory conditions.
Microsatellite DNA polymorphisms and the relation with body weight in sea cucumber Apostichopus japonicus

The relationship between microsatellite polymorphism and body weight of captive bred Chinese sea cucumber Apostichopus japonicus was investigated in two local populations in Dalian. Among ten loci discovered, nine show changes except for AJ07 loci. Seven loci were found highly polymorphic in both populations. For each locus in two populations, the average number of alleles is 6.428 6 and 6.285 7, the average observed heterozygosity at 0.225 7 and 0.245 9, the expected heterozygosity at 0.776 8 and 0.748 8, the polymorphism information content (PIC) at 0.709 2 and 0.674 6, respectively. Further analysis show significant correlation between A. japonicus body weight and occurrence markers AJ02 and AJ04. The findings of the relation may be helpful for molecular breeding, as well as the marker-assisted selection of sea cucumbers.
Selectively colorimetric detection of cysteine with triangular silver nanoprisms

Triangular silver nanoprisms were prepared and applied to make colorimetric detection of cysteine based on our findings that cysteine could lead to the blue shift of the dipole plasmon resonance absorption,but other 19 kinds of natural amino acids could not.Cysteine with a concentration 160 nmol/L can result in a color change that can be discerned with naked eyes.
Two new triterpenes from Duchesnea indica

Two new triterpenes,2α,3β-dihydroxyurs- 12-en- 18,19-epoxy-28-oic acid (1) and 18,19-seco,2α,3α-dihydroxyl-19-oxo-urs11,13(18)-dien-28-oic acid (2) were isolated from the herbaceous part of Duchesnea indica. Their structures were elucidated by spectroscopic analysis,including 2D NMR technique.The isolated compounds exhibited moderate cytotoxic activities against HeLa and L929 cell lines.
Seismic stratigraphy of the Qiongdongnan deep sea channel system, northwest South China Sea

Based on more than 4000 km 2D seismic data and seismic stratigraphic analysis, we discussed the extent and formation mechanism of the Qiongdongnan deep sea channel. The Qiongdongnan deep sea channel is a large incised channel which extends from the east boundary of the Yinggehai Basin, through the whole Qiongdongnan and the Xisha trough, and terminates in the western part of the northwest subbasin of South China Sea. It is more than 570 km long and 4-8 km wide. The chaotic (or continuous) middle (or high) amplitude, middle (or high) continuity seismic facies of the channel reflect the different lithological distribution of the channel. The channel formed as a complex result of global sea level drop during early Piiocene, large scale of sediment supply to the Yinggehai Basin, inversion event of the Red River strike-slip fault, and tilted direction of the Qiongdongnan Basin. The large scale of sediment supply from Red River caused the shelf break of the Yinggehai Basin to move torwards the S and SE direction and developed large scale of prograding wedge from the Miocene, and the inversion of the Red River strike-slip fault induced the sediment slump which formed the Qiongdongnan deep sea channel.
Synthesis of novel methotrexate derivatives with inhibition activity of nitric oxide synthase

Seventeen 4-alkylamino/arylamino-substituted methotrexate(MTX)derivatives 6a-14a were designed and synthesized.Their inhibition activities against inducible nitric oxide synthase(iNOS)were evaluated in vitro.The pharmacological results showed that most of the prepared compounds displayed the potent inhibitory effects on iNOS.
Biomimetic transformation of gentiopicroside to erythrocentaurin

Biomimetic transformation of gentiopicroside was carried out by β-glueosidase at pH 7.0 for 3 days at 37 ℃.Two products,erythrocentaurin and 5,6-dihydro-5-formyl-6-methyl-1H,3H-pyrano[3,4-c]pyran-1-one were isolated and identified by 1H NMR,~(13)C NMR,UV,IR,MS and elemental analyse.The possible mechanisms were discussed.
A two step facile synthesis of new steroidal linear and angular pyranones having anti-mycobacterial activity

Title compounds 2',2'-dimethylcholesta-2,4-dien[3,2-b]-pyran-4'-one(3),2',2'-dimethyl-3β-substituted cholesta-4,6-dien[7,6-b]-pyran-4'-one(6a,b)and(6c)were prepared by the cyclization of 2-acetylcholesta-2,4-dien-3-ol(2),6-acetyl-3β-substituted-cholesta-4,6-dien-7-ol(Sa,b)and(5c)respectively,with pyrrolidine,dry benzene and dry acetone using Dean Stark separator through conventional heating.Furthermore,compounds were also found to be active against Mycobacterium tuberculosis.
异丙酚对大鼠脑缺血再灌注海马细胞周期因子变化及神经元凋亡的影响

目的: 探讨大鼠局灶性脑缺血再灌注后海马神经元细胞周期蛋白1(cyclin D1)和细胞周期蛋白依赖性蛋白激酶4(cyclin-dependent kinase 4,CDK4)的表达与神经元凋亡的关系及异丙酚的脑保护作用.方法: 采用大脑中动脉内栓线阻断法(middle cerebral artery obstruction,MCAO)造成局灶性脑缺血再灌注模型.用免疫印迹法(Western blotting)观察cyclin D1和CDK4蛋白的表达;采用流式细胞仪检测海马神经元凋亡.再灌注48 h时进行大鼠神经功能缺陷比较.结果: (1)异丙酚可以改善大鼠脑缺血再灌注后的神经功能缺陷(P＜0.01);(2)与假手术组比较,脑缺血再灌注48 h后缺血侧海马神经元cyclin D1、CDK4表达明显升高、凋亡细胞数明显增多(P＜0.01).与缺血再灌注组比较,异丙酚组海马神经元cyclin D1、CDK4的表达和凋亡率明显降低(P＜0.05).结论: 脑缺血再灌注后缺血侧海马cyclin D1、CDK4表达增强,这可能是介导脑缺血再灌注后神经元凋亡的机制之一;异丙酚可下调神经元cyclin D1、CDK4的表达,抑制神经元凋亡,减轻缺血再灌注对大鼠海马神经元的损伤.
Impact of small-world topologies on broadcasting for wireless sensor networks

Broadcasting is an important operation and been widely used in wireless sensor networks (WSNs). These networks are power constrained as nodes operate with limited battery power. Wireless sensor networks are spatial graphs that have much more clustered and much high path-length characteristics. After considering energy-efficient broadcasting in such networks, by combining the small-world characteristic of WSNs and the properties of ant algorithm to quickly identify an optimal path, small-world power-aware broadcast algorithm is introduced and evaluated. Given different densities of network, simulation results show that our algorithm significantly improves life of networks and also reduces communication distances and power consumption.
Method to determine α in rough set model based on connection degree

An improvement of tolerance relation is proposed in regard to rough set model based on connection degree by which reflexivity of relation can be assured without loss of information. Then, a method to determine optimal identity degree based on relative positive region is proposed so that the identity degree can be computed in an objective method without any preliminary or additional information about data, which is consistent with the notion of objectivity in rough set theory and data mining theory. Subsequently, an algorithm is proposed, and in two examples, the global optimum identity degree is found out. Finally, in regard to optimum connection degree, the method of rules extraction for connection degree rough set model based on generalization function is presented by which the rules extracted from a decision table are enumerated.
Protective effects of electroacupuncture on acetylsalicylic acid-induced acute gastritis in rats

AIM: To invest igate the protect ive effects of electroacupuncture (EA) pretreatment on acetylsalicylic acid (ASA)-induced ulceration in rats. METHODS: We randomly divided 72 rats into three groups including control (administered with distilled water), ASA group (administered 100 mg/kg ASA) and EA group (administered EA + 100 mg/kg ASA). Each rat was fasted for 18 to 24 h before experimentation, and lesion scores, gastric acidity, cyclooxygenase (COX)-1 and -2 mRNA levels, and total nitric oxide (NO) concentration were measured. RESULTS: The lesion scores of the EA group were significantly lower than those of the ASA group. Gastric acidity of the ASA and EA groups was reduced compared to the control group. COX-1 and -2 mRNA levels were significantly increased in the EA group as compared to the control and ASA groups, and NO levels were also significantly increased in the EA group as compared to the ASA group. CONCLUSION: These results suggest that EAmediated protection against ASA-induced ulceration in rats may occur via gastric defense components.
Postpartum spontaneous colonic perforation due to antiphospholipid syndrome

The antiphospholipid syndrome (APS) is a multi-systemic disease being characterized by the presence of antiphospholipid antibodies that involves both arterial and venous systems resulting in arterial or venous thrombosis, fetal loss, thrombocytopenia, leg ulcers, livedo reticularis, chorea,and migraine. We document a previously unreported case of a 37-year-old female in whom APS was first manifested by infarction and cecal perforation following cesarean section. At laparotomy the underlying cause of colonic perforation was not clear and after resection of the affected bowel an ileo-colostomy was performed. The diagnosis of APS was established during post-operative hospital stay and the patient was commenced on warfarin.Eventually, she made a full recovery and had her stoma reversed after 4 mo. Pregnancy poses an increased risk of complications in women with APS and requires a more aggressive approach to the obstetric care. This should include full anticoagulation in the puerperium and frequent doppler ultrasound monitoring of uterine and umbilical arteries to detect complications such as preeclampsia and placental insufficiency.
220 kV兴城变综合备自投装置运行分析及改进

随着电力用户对电网运行水平和供电可靠性的要求愈来愈高,电网运行方式对备用电源自投装置也提出了更严格的要求,即确保在故障情况下,能够最大限度地保证对用户供电的连续性和可靠性.文章以兴城220kV变电站为例,分析了该站11种运行方式下综合备自投装置的应用需求,针对现有综合备自投装置的设计缺陷提出了改进措施.
环境污染物邻苯二甲酸酯致男性生殖损害的研究进展

邻苯二甲酸酯(PAEs)是目前我国环境污染最广、检出率最高的持久性有机污染物,是一类典型的具有环境雌激素效应的化合物.作者综述了近年来国内外有关PAEs致男性生殖损害和不育的细胞及分子机制、人群流行病学研究、环境易感性和环境一基因交互作用的最新研究进展.
Modes of action of fraxinellone against the tobacco budworm,Heliothis virescens

Fraxinellone significantly reduced the relative growth rate, food consumption rate as well as the efficiency of conversion of ingested food into biomass of Heliothis virescens when incorporated into artificial diets at concentrations of 4.31 × 10-5 mol/L and above. After being fed with fraxinellone-treated diets for 24 h, the larval midguts of H. virescens possess significantly lower activities of a-amylase and non-specific proteases and higher activities ofcytochrome P450s. In vitro, the compound did not inhibit the activities of α-amylase and non-specific proteases extracted from the larval midguts. Clear evidence of post-ingestive toxicity of fraxinellone to midgut cells was observed under an electron microscope. The modes of action of the compound against insects were discussed.