摘要：基于玛纳斯河流域中游平原灌区及其周边24个气象站点2013年的气象资料,采用分段单值平均法计算棉花作物系数,利用参考作物法确定灌区各站点棉花不同生育期耗水强度,结合Arc GIS空间插值,分析灌区棉花耗水强度在不同生育期和灌区空间尺度上的变化规律,并确定灌区棉花设计耗水强度。结果表明:灌区棉花全生育期耗水强度呈现先增大后减小的变化趋势,大小顺序为花铃期(5.64~6.84 mm/d)>蕾期(3.74~4.70 mm/d)>吐絮期(2.00~2.50 mm/d)>苗期(1.62~1.76 mm/d);灌区棉花全生育期平均耗水强度自西南向东北呈现递增趋势,介于3.45~3.98 mm;玛河灌区棉花设计耗水强度应在5.69~6.45 mm间选取。

摘要：目的探讨不同血压分层对糖尿病人群肾功能的影响。方法采用前瞻性队列研究设计,以2006年7月-2007年10月参加健康查体的101510名开滦集团职工中9489例糖尿病患者作为观察队列,随访(8.6±4.0)年。依据基线血压水平将研究人群分为正常血压(收缩压<120 mmHg、舒张压<80 mmHg)、血压升高(收缩压120~130 mmHg、舒张压<80 mmHg)、高血压1级[收缩压130~140 mmHg和(或)舒张压80~90 mmHg]、高血压2级[收缩压≥140 mmHg和(或)舒张压≥90 mmHg]4组。比较各组人群的慢性肾脏病(CKD)的发病密度。采用多变量Cox比例风险回归模型分析不同血压对糖尿病人群肾功能的影响,采用多变量时间依赖性Cox比例风险模型分析结果的稳定性,并排除随访期间发生心血管事件(CVD)、基线服用降压药和基线服用降糖药后进行敏感性分析。结果(1)在基线水平,高血压1级组患者年龄、体重指数(BMI)高于正常血压组患者,差异有统计学意义(P<0.05)。(2)至随访结束时,发生CKD 2294例,其中估算肾小球滤过率(eGFR)下降1117例,尿蛋白1575例,高血压1级组CKD的发病密度为39.4/千人年,eGFR下降发病密度为16.3/千人年,尿蛋白发病密度为25.5/千人年,与正常血压组比较差异均有统计学意义(log-rank检验,P<0.01)。(3)多因素Cox比例风险回归模型分析显示,与正常血压比较,高血压1级可使糖尿病人群发生CKD的风险增加29%(HR=1.29,95%CI 1.09~1.52)、eGFR下降的风险增加40%(HR=1.40,95%CI 1.08~1.80)。结论高血压1级(≥130/80 mmHg)即可增加糖尿病人群发生CKD和eGFR下降的风险,且eGFR下降的风险更大。

摘要：文章介绍了出口墨西哥380HBW级别LH在线热处理钢轨的生产工艺概况,通过对钢轨微合金化成分设计、冶炼工艺高洁净度控制和精准在线热处理工艺调控,成功批量生产LH在线热处理钢轨。钢轨各项性能满足用户技术要求和AREMA标准要求,通过SGS国际检测认证,满足国外重载铁路大轴重货运列车的运行要求,钢轨已出口至墨西哥、澳大利亚、美国等国家。

摘要：在分析和研究强化地板加工工艺的基础上,结合强化地板全自动生产线的工艺流程,确定了强化地板数控横向开榫机的开榫工艺及加工运动方式。对强化地板数控横向开榫机的齐边锯主轴进行ANSYS有限元分析和静力学仿真分析,获得其应力、应变和变形云图,校核其强度、刚度;通过模态分析,获得齐边锯主轴的前六阶固有频率及振型,检验其振动稳定性,验证其结构设计合理性。为设备主轴的创新设计提供了新的思路。

摘要：本文分析了高压柱塞泵配流副三角槽的参数变化对泵的效率、柱塞腔的压力变化等的影响,为配流副三角槽的设计提供了参考。

摘要：In order to satisfy the requirements of beam measurement in the heavy ion medical machine and other small nuclear physics experiments, we designed and built a nuclear instrumentation module-based data acquisition system. This is composed of a set of functional modules and a purpose-built bus. One of the modules operates as a master, collecting data from the other slave modules. It then sends the data to the back-end computer via *** addition to the hardware, dedicated software has been designed and implemented. In this paper, we provide a detailed description of the architecture of the system, the data frame, and the software. The bus is the central part of the system. It can transmit data from the slave modules to the master at 33 MB/s. The frame used to transmit the data also ensures its integrity and monitors the hardware architecture. The client software is designed to process data in real time and store data on a hard disk for later analysis.

摘要：某核电厂蒸汽隔离阀长期处于蒸汽环境下,伴随高温、高湿状态,可能会导致阀门内部温度过高,引起阀门电装无法正常动作。考虑到阀门内部温度场不能有效的通过实验方法进行测量,且数值计算(CFD)能通过精细化的后处理,将数值求解结果形象直观地表示出来,以便于理解,因此本次对于阀门内部温度分布及散热优化问题的分析,采用CFD方法开展。结合本次阀门内部流场分布及温度场分布的实际情况,本次热工流体数值模拟采用非结构化网格开展数值模拟计算。通过本次计算分析蒸汽隔离阀的传热情况,判断阀门在高温流体下电机的可用性。经数值模拟仿真分析,结果显示配有散热翅片的闸阀有效地降低了闸阀阀体上端的温度,阀门在常开状态下,虽处于高温蒸汽中,也能保证电装的可用性。

摘要：利用包钢高炉重矿渣碎石粗集料和石灰岩细集料,设计制备了C-C-2级配水泥稳定基层混合料,进行了其强度及抗冻性能研究。结果表明,水泥(PO32.5)剂量为3%时,C-C-2重矿渣水泥稳定混合料的7 d无侧限抗压强度可以达到5.0 MPa以上。随着水泥剂量的增加,混合料的7 d无侧限抗压强度增大。水泥剂量为4%时,C-C-2重矿渣水泥稳定混合料的最大干密度最大,同时,对于提高重矿渣水泥稳定混合料的180 d抗压强度和抗冻性能效果显著。

摘要：Direct carbon solid oxide fuel cells(DC-SOFCs)are promising,green,and efficient power-generating devices that are fueled by solid carbons and comprise all-solid-state *** suitable anode materials for DC-SOFCs is a substantial scientific *** we investigated the use of La_(0.75)Sr_(0.25)Cr_(0.5)Mn_(0.5)O_(3)-δ−Ce_(0.8)Gd_(0.2)O_(1.9)(LSCM−GDC)composite electrodes as anodes for La_(0.9)Sr_(0.1)Ga_(0.8)Mg_(0.2)O_(3)-δelectrolyte-based DC-SOFCs,with Camellia oleifera shell char as the carbon *** LSCM−GDC-anode DC-SOFC delivered a maximum power density of 221 mW/cm^(2) at 800℃ and it significantly improved to 425 mW/cm^(2) after Ni nanoparticles were introduced into the LSCM−GDC anode through wet *** microstructures of the prepared anodes were characterized,and the stability of the anode in a DC-SOFC and the influence of catalytic activity on open circuit voltage were *** above results indicate that LSCM–GDC anode is promising to be applied in DC-SOFCs.

摘要：In this study, a membraneless, monolithic micro photocatalytic fuel cell with an air-breathing cathode was developed for simultaneous wastewater treatment and electricity generation. In this newly-developed micro photocatalytic fuel cell, the photoanode and cathode were arranged with a shoulder-to-shoulder design, forming two planar electrodes. Such design offers several advantages of enhanced mass transfer, uniform light distribution, short light transfer path, membrane elimination and easy fabrication, integration, and compatibility with other microdevices. The performance of this type fuel cell was evaluated by using methanol as a model pollutant under the alkaline condition. Experimental results indicated the developed micro photocatalytic fuel cell was able to show good photo-response to the illumination and satisfactory performance as well as durability. Parametric study on the cell performance was also performed. It was found that increasing the light intensity, methanol concentration andKOH concentration could improve the cell performance. But for the effect of the liquid flow rate, it was shown that the cell performance firstly increased with increasing the liquid flow rate and then decreased with further increasing the liquid flow rate. This study not only opens a new avenue for the design of the micro photocatalytic fuel cell but also is helpful for the optimization of the operating conditions.