等直径钢丝组股中心钢丝加大量的研究

用等直径钢丝组股时,为保证在捻股时不出现跳丝,中心钢丝的加大量应根据所捻制股结构的不同而不同;组股钢丝层数越多,中心钢丝加大量应再适当增加;仅根据外层钢丝大小对中心钢丝进行加大是不合适的。

减少肥料用量并改变肥料种类对上海青生长发育和产量的影响

该文探究了在氮肥用量大幅减少(分别减少84.38%和68.75%)的条件下,通过施用健加宝®大量元素水溶肥料与沃土润®含腐植酸水溶肥料替代传统复合肥及有机肥,对上海青生长发育及产量的影响。试验结果表明,与常规施肥相比,氮肥用量减少84.38%和68.75%时,施用健加宝®大量元素水溶肥料和沃土润®含腐植酸水溶肥料可促进上海青的生长发育,表现为植株生长健壮,株高、茎粗、叶面积等性状指标较高,同时上海青的产量和经济效益均有提高。鉴于当前农业生产面临的资源高效利用与环境保护的双重挑战,为进一步优化上海青的种植管理,建议在氮肥用量减少84.38%的基础上,每667 m^(2)施健加宝®大量元素水溶肥料5 kg、沃土润®含腐植酸水溶肥料5~10 kg。

健加宝^(®)大量元素水溶肥在绿色小番茄上的应用效果

为探明上海地区夏季高温条件下,不同肥料处理对绿色小番茄生长发育的影响,作者开展了健加宝^(®)大量元素水溶肥和雅苒苗乐^(®)复合肥对绿色小番茄产量和种植效益的影响试验。试验结果表明,健加宝^(®)大量元素水溶肥处理番茄的单果质量、糖度、每667 m^(2)产量及净产值分别为18.71 g、11.42°、910.65 kg、12330.40元,较复合肥处理分别增加6.07%、1.31°、6.52%、12.27%,叶厚、叶长、叶宽、茎粗较复合肥处理分别增加17.91%、4.46%、6.41%、11.00%。综上所述,健加宝^(®)大量元素水溶肥可在上海地区夏季绿色小番茄生产中应用。

中小型数据库在大数据中的应用

介绍了中小型数据库的概念、设计原则及应用意义。分析中小型数据库在大数据中的应用策略,主要包括在数据加工处理、大量业务处理、查询功能、大量数据加载、扩容中的应用等内容。同时还对中小型数据库的应用趋势做出展望,随着技术创新发展,面向云平台的数据管理技术、大数据统一处理平台出现,并在大数据中得到应用。

吃素有理?

1为使素食好吃,可多放些油盐等调味品为了控制体重、预防"三高"等富贵病,不少白领选择吃素.可素食馆里的一指禅、东坡肉、烤(炸)蔬菜等美食,口味厚重,热量、糖分和盐分一点儿都不低;超市里热销的油豆腐、油豆皮、素鸡、素鸭、酥点、酥饼等素食,口感虽好,也存在着油盐糖超标的情况;在家烹饪时,为了改善素食的清淡风味,不少人也会添加大量的油脂、糖、盐和其他调味品,如炒菜时用油用盐多,调配饮料时多加糖等.常吃这些素食,很容易摄入过多的油盐糖而影响健康,如升高血脂和体重,诱发脂肪肝、糖尿病等慢性病.

An Accelerated Simulation Method for ELDRS of Bipolar Operational Amplifiers Using a Dose-Rate Switching Experiment

Through different dose-rate switching evaluation methods,the radiation-response rules of operational amplifiers are studied when the irradiation dose rate is switched from high to low under different radiation temperatures and total doses. The experimental results indicate that the response characteristics could be affected by the switching total doses, irradiation temperatures,and dose rates individually or together. Accelerated evaluation on the ELDRS can be realized by adopting a proper dose-rate switching method. Meanwhile, the irradiation time can also be reduced. Finally, the mechanisms of the difference between various radiation responses are analyzed.

Isolation of Pd atoms by Cu for semi-hydrogenation of acetylene: Effects of Cu loading

Cu‐alloyed Pd single‐atom catalysts exhibit excellent catalytic performance for the semi‐hydrogenation of acetylene;however,the limit of the Cu/Pd atomic ratio for forming the alloyed Pd single‐atom catalyst is ambiguous.Herein,silica‐supported Cu-Pd bimetallic catalysts with fixed Pd content and varied Cu loadings were synthesized using an incipient wetness co‐impregnation method.The X‐ray absorption spectroscopy results indicated that Pd formed an alloy with Cu after reduction at250°C and that the Pd atoms were completely isolated by Cu for Cu/Pd atomic ratios≥40/1.Notably,increasing the reduction temperature from250to400°C hardly affected the catalytic performances of the Cu-Pd/SiO2catalysts.This finding can be attributed to the similar chemical environments of Pd demonstrated by the X‐ray absorption spectroscopy results.

Topographic Indices and Yield Variability in a Rolling Landscape of Western Canada

Understanding the relationships between topographic indices and crop yield variability is important for soil manage- ment and crop production in rolling landscape. Two agricultural fields at Alvena and Hepburn, Saskatchewan, Canada were selected to examine how topographic indices were related to wheat yield under two topographic and weather conditions in the Canadian prairies. The landscapes of the two sites are classified as hummocky and the dominant soil type is an Aridic Ustoll. The relationships among yield, topography, soil, and weather were analyzed using wheat (Triticum aestivum L.) grain yield from Alvena in 2001 (dry year) and 2004 (wet year) and from Hepburn in 1998 (dry year). Topographic/soil indices included relative elevation, wetness index, upslope length, curvature, soil organic matter, and soil moisture storage before seeding. The results indicated that, in the dry years, the correlation coefficients between upslope length and grain yield were 0.79 for the typical rolling landscape (Alvena) in 2001 and 0.73 for shallow gentle rolling landscape (Hepburn) in 1998. In the wet year (2004), the relationships between yield and topographic/soil attributes were not as strong as in dry years. Therefore, upslope length was the best yield indicator for the two landscapes in dry years, whereas no topographic indices were highly correlated to crop yield in wet years. Those topographic indices seemed useful in identifying the yield variability and delineating the proper management zone.

Anglo-American Special Relations： Atomic Diplomacy and the Canadian Dimension, 1942-1948

In recent years, we have entered a period of increasing impact of world affairs on national politics and international security. Notwithstanding, the present debate on national security and nuclear proliferation, Anglo-American ＂special relations＂ continue to be a subject of vigorous discussion influenced by the impact of new international emergencies as unstable countries acquire nuclear power and refuse ＂to reign＂ in their nuclear programmes （The Globe and Mail, 12 January 2012）. Along these lines the 71st anniversary of the Anglo-American Manhattan Project presents a unique opportunity to reappraise the Anglo-American wartime collaboration （or lack of） in atomic energy developments that resulted in the tragedy of nuclear weapons escalation. The Quebec Agreements of 1943-1944 were crafted to address the controlled flow of scientific information. But did this mean a trend toward more effective collaboration or toward greater American control of the atomic project？ This study explores the subject of nuclear politics from an unique vantage point of Anglo-Canadian and American-Canadian atomic diplomacy. In doing so, it will show that both the American and British atomic policy makers violated the Quebec Agreements. It seeks to demonstrate that （1） in the tangle of competition replacing cooperation, Canada was more important to the American atomic monopolists than the Anglo-AmcTican partnership, （2） the US-Canada Trade and Defence Agreements contributed to United States retaining exclusive control of the ＂absolute weapon＂, and that （3） their post-war nuclear energy agenda delayed Britain＇s atomic venture and isolated Britain from full participation in Arctic research. In practical terms, the emerging atomic policy in Washington boiled down to maintaining the American edge, come what may, and reducing British prestige in the post-war world. The article concludes by raising the question： did the United States, Britain, and Canada really work for atomic control？

Influence of Some Factors on the Efficiency of Heat Storage Accumulator in the Bed of a Stone in a Plastic Tunnel

The study was conducted in a plastic tunnel in which the heat storage system was installed in the stone accumulator. The system consists of a suction pipe warm air fan and perforated pipes placed in the stone＇s accumulator. The accumulator used a bed of stone （porphyry-type stones of dimension in the range 37 mm to 65 ram）. In the accumulator, there are four sections with dimensions of 1.7 m × 11 m, each of which contains a perforated pipe for hot air distribution within the battery, and separate conduits for supplying air to the interior of the tunnel. The paper presents the results of analysis related to performance （as a result of heat and mass transfer） in cycles of charging and discharging of the accumulator.

Multiple dependent reliability estimation of large range MEMS accelerometers in high temperature environment

In the past,only one performance parameter was considered in the reliability estimation of micro-electro-mechanical system (MEMS) accelerometers,resulting in a one-sided reliability evaluation. Aiming at the failure condition of large range MEMS accelerometers in high temperature environment,the corresponding accelerated degradation test is designed. According to the degradation condition of zero bias and scale factor,multiple dependent reliability estimation of large range MEMS accelerometers is carried out. The results show that the multiple dependent reliability estimation of the large range MEMS accelerometers can improve the accuracy of the estimation and get more accurate results.

Yield Response to Deficit Irrigation and Partial Root-Zone Drying in Processing Tomato （Lycopersicon esculentum Mill,）

Due to the global expansion of irrigated areas and the limited availability of irrigation water, it is necessary to optimize water use in order to maximize crop yields under water deficit conditions. To evaluate the yield response of two processing tomato hybrids （Ercole and Genius） grown under different irrigation treatments, a field trial was conducted during the 2008 growing season in Southern Italy. Three irrigation treatments were used： the restitution of 70% of maximum evapotranspiration （ETc） both under ＂Deficit Irrigation＂ （70DI） and ＂Partial Root-zone Drying＂ （70PRD） strategies; full irrigated （FI： 100% ETc）. The two water deficit irrigation treatments （DI and PRD） showed stomatal conductance values lower than FI treatment and saved a substantial amount of water maintaining reasonable marketable yield. Moreover, PRD strategy showed slightly higher ＂Water Use Efficiency＂ （WUE） values than DI. Finally, ＂yield response factor＂ （Ky） showed always values less than unity, indicating the possibility to adopt, within certain limited condition, both DI and PRD in field-grown processing tomato cultivated in Southern Italy. In conclusion, in our experimental conditions, deficit irrigation practices seem to be acceptable relatively to processing tomato yield aspects and Ky could be promoted as a useful indicator for irrigation in water deficit conditions.

Implementation of a Forest Biomass-Based Biofuel Industry： A Canadian Experience

The forest biomass is an abundant renewable resource from which biofuels can be derived. In the Kraft process, the cellulose is extracted from the wood to form the paper pulp while the other organic components, primarily hemicelluloses and lignin, are burnt to produce steam. It is possible to divert part of the hemicelluloses or lignin to produce fuels on site, a mode of operation referred to as the integrated forest biorefinery. Hemicelluloses can be hydrolysed into sugars which in turn are converted into ethanol or butanol, while lignin can be extracted from a residual process stream, the black liquor, by acid precipitation, de-ionized, dried and directly used as a fuel or further processed into value added chemicals. Biorefinery processes have been proposed and analysed by simulation on Aspen Plus. Intensive integration of thermal energy, water and material systems is of paramount importance to the sustainability of the global site; the increased energy load on the utility systems could cause rising dependency of the global site on fossil fuels. To avoid this consequence, a new original energy efficiency analysis and enhancement methodology has been developed and validated on actual Canadian Kraft mills before being applied to the integrated biorefinery and, has produced remarkable results far superior to the current engineering practice. This has led to the concept of the GIFBR （green integrated forest biorefinery）, i.e., an industrial site with zero fossil fuel consumption and reduced GHG （greenhouse gases） emissions vs. the Kraft process and biorefinery plant alone. The GIFBR incorporates a woody biomass gasifier producing syngas as a fuel for the integrated biorefinery and for steam production or sale. It can also include a CHP （combined heat and power） unit driven by steam made available by liberated production capacity from the installed power plant.

Experimental study of traffic-induced vibration of the new CCTV headquarters building

The traffic-induced vibrations of the new CCTV Headquarters building are studied stages. In the first stage when the through experiments in two 30th floor of the northwest tower and the 38th floor of the southeast tower were finished, the traffic flows on the roads surrounding the building were investigated, and 27 setups of accelerations were measured at the roadside, on the pile cap and on the 9th floor. In the second stage when the whole steel structure was completed, l 5 setups of accelerations were measured at the roadside, on the pile cap and on the 37th and the 48th floors. The accelerations of the building under different traffic flows, in different positions are analyzed in both time domain and frequency domain. The damping ratios are estimated by the upgraded half-power bandwidth method.

药流中加大用量终止大于7周早孕及中孕216例分析

米非司酮序贯合用常规量米索前列醇（俗称药物流产）终止于7周以内早孕的疗效已被临床确认,但因其要求孕龄小,因而其使用对象受到局限.自2005年5月以来,我院妇科采用药流加大用量口服,终止孕龄大于7周至18周以内早孕及中孕216例,取得较为满意疗效,现总结如下：

Nutrient resorption and stoichiometric responses of poplar(Populus deltoids)plantations to N addition in a coastal region of eastern China

Aims Leaf nutrient resorption is sensitive to changes in soil nutrients.However,the effects of N deposition on nutrient resorption efficiency(NuRE)in plant macro-nutrients remain unclear.Poplar(Populus deltoids)is one of the most extensively cultivated hardwood species worldwide.We explored general patterns and dominant drivers of NuRE and stoichiometry of poplar plantations in response to N addition.Methods We conducted a 4-year N-addition experiment to explore NuRE and stoichiometric responses to N addition in two poplar(P.deltoids)plantations(8-and 12-year-old stands)in a coastal region of eastern China.We measured soil and foliar(green and senesced leaves)concentrations of nitrogen(N),phosphorus(P),potassium(K),calcium(Ca)and magnesium(Mg)for a series of N addition treatments including N_(0)(0 kg N ha^(−1)yr^(−1)),N_(1)(50 kg N ha^(−1)yr^(−1)),N_(2)(100 kg N ha^(−1)yr^(−1)),N_(3)(150 kg N ha^(−1)yr^(−1))and N_(4)(300 kg N ha^(−1)yr^(−1)).Important Findings Consistent for(both)8-and 12-year-old stands,N addition did not affect the NuRE and stoichiometry(with the exception of CaRE and CaRE:MgRE ratio).N resorption efficiency–P resorption efficiency(NRE–PRE)scaling slopes were consistently less than 1.0 under N addition.These results suggest that NRE generally decouples from PRE within each N treatment.Moreover,these results point to robust control of green leaf nutritional status on nutrient resorption processes as indicated by the positive relationships between NuRE and green leaf nutrient concentrations.Our findings provided a direct evidence that growth in 12-year-old poplar plantations was N-limited in the coastal region of eastern China.

Ergodic secrecy capacity of MRC/SC in single-input multiple-output wiretap systems with imperfect channel state information

This paper investigates the secrecy performance of maximal ratio combining （MRC） and selection combining （SC） with imperfect channel state information （CSI） in the physical layer. In a single-input multiple- output （SIMO） wiretap channel, a source transmits confidential messages to the destination equipped with M antennas using the MRC/SC scheme to process the received multiple signals. An eavesdropper equipped with N antennas also adopts the MRC/SC scheme to promote successful eavesdropping. We derive the exact and asymptotic closed-form expressions for the ergodic secrecy capacity （ESC） in two cases： （1） MRC with weighting errors, and （2） SC with outdated CSI. Moreover, two important indicators, namely high signal-to-noise ratio （SNR） slope and high SNR power offset, which govern ESC at the high SNR region, are derived. Finally, simulations are conducted to validate the accuracy of our proposed analytical models. Results indicate that ESC rises with the increase of the number of antennas and the received SNR at the destination, and fades with the increase of those at the eavesdropper. Another finding is that the high SNR slope is constant, while the high SNR power offset is correlated with the number of antennas at both the destination and the eavesdropper.

RF and field measurements of the SSC-LINAC RFQ

The 53.667 MHz continuous-wave heavy ion RFQ has been designed and manufactured for the SSC-LINAC project.This four-rod RFQ accelerates ions with maximum mass to charge ratio of 7 from 3.728 keV/u to 143 keV/u.Measurements have been carried out to check the RF performance of the cavity and the quality of the electric field.The S11 of the power coupler is adjusted to better than-44 dB,and the Q0 of the cavity is 6440.The quality of the electric field is evaluated by the perturbation method.The measurement procedure and data analysis will be discussed in detail.The error due to gravity of the perturbation bead has been corrected by averaging the fields in different quadrants.As a result,the unflatness of the electric field is±2.5%,and the dipole field component distributes from 0%to 20%in different longitudinal positions,which indicates the asymmetry of the quadrupole field.The unflatness of the quadrupole field distribution represents a good agreement with the simulation results.High power RF test and beam commissioning of the RFQ are on schedule in early 2014.