MTP工艺副产混合芳烃非芳烃馏分催化裂解实验研究

以MTP(甲醇制丙烯)工艺副产混合芳烃为研究对象,采用实沸点蒸馏仪以100℃为切割点对MTP混合芳烃进行蒸馏切割。切割后的<100℃非芳烃馏分烯烃含量较高,约占混合芳烃总量的50%。对再生ZSM-5催化剂在克级催化裂化装置上的催化裂解反应特点及产物分布进行了研究。结果表明:混合芳烃<100℃非芳烃馏分、水、甲醇混合进料时,催化剂再生干气平均产率为5%左右;随反应时间延长,液化石油气(C3+C4)产率呈缓慢下降趋势;液相C+5平均产率在60%左右,随反应时间延长,芳烃含量与烯烃含量变化趋势相反;液相C+5组分密度较非芳烃馏分稍有增加,随反应时间延长,该组分密度整体呈现下降趋势;反应初期部分样品诱导期超过480 min,满足国Ⅵ汽油标准要求,随反应时间延长,产物氧化诱导期呈逐渐缩短趋势。

煤炭间接液化柴油排放特性实验研究

选用宁夏煤业公司煤炭间接液化柴油(间接液化柴油)、中国石油天然气股份有限公司化石柴油(中石油柴油)和中国神华煤制油化工有限公司煤炭直接液化柴油(直接液化柴油)为实验燃料,分别在发动机转速为1 200、1 400、1 700、2 000 r/min条件下对比考察了燃用3种柴油后CO、HC、NO和烟度等的排放特性。结果表明:燃用间接液化柴油时,污染物CO排放量最低;与中石油柴油相比,燃用间接液化柴油NO、HC排放量略低,但在转速为2 000 r/min的中低负荷下,燃用间接液化柴油的HC排放量比中石油柴油略高;在上述4个转速条件下,燃用间接液化柴油CO排放量平均下降率为30%左右;HC排放量平均下降率为24%左右;NO排放量平均下降率为12%左右;烟度平均上升率为4%左右。综上所述,燃用间接液化柴油具有良好的环保性。

广播电视信号的自动监测系统设计

提出一种广播电视信号的自动监测系统,以改变传统的人工定期外出收测方式;在广播电视覆盖区范围内的多个监测点上设置前端设备,用于接收广播电视信号并将信号频率、场强、监测点名称等信息通过网络传输到处理终端,进行监测点信号场强的自动检测和分析;前端设备以单片机为核心,连接天线和选频电路、检波电路、模数转换器、数模转换器以及网络收发器,通过软件循环选频、处理场强数据;网络收发器实现前端设备以有线或无线方式接入互联网,从而与处理终端连接和数据交互;处理终端以桌上型PC、膝上型PC或者掌上PC为平台,通过软件远程接收互联网传输的数据,对每个监测点上的前端设备所发送的信号频率、场强、监测点名称等信息进行存储和显示;系统运行正常,数据精确,方便快捷,稳定可靠,省时省力,具有很高的推广价值。

广播电视发射网信息管理系统

提出一个广播电视发射网信息管理系统,以改变传统的人工管理方式。系统基于B/S模式,以请求响应式的方式,记录广播电视发射网信息、广播电视发射台信息、广播电视发射机信息、广播电视发射信号信息,对这些信息可进行相应的分析和处理。系统运行正常,数据精确,方便快捷,稳定可靠,省时省力,具有很高的推广价值。

The three-dimensional structure and seasonal variation of the North Pacific meridional overturning circulation

The three-dimensional structure and the seasonal variation of the North Pacific meridional overturning circulation （NPMOC） are analyzed based on the Simple Ocean Data Assimilation data and Argo profiling float data. The NPMOC displays a multi-cell structure with four cells in the North Pacific altogether. The TC and the STC are a strong clockwise meridional cell in the low latitude ocean and a weaker clockwise meridional cell between 7°N and 18°N, respectively, while the DTC and the subpolar cell are a weaker anticlockwise meridional cell between 3°N and 15°N and a weakest anticlockwise meridional cell between 35°N and 50°N, respectively. The DTC, the TC and the STC are all of very strong seasonal variations. As to the DTC, the southward transport is strongest in fall and weakest in spring. For the TC, the northward transport is strongest in winter and weakest in spring, while the southward transport is strongest in fall and weakest in spring, which is associated with the strong southward fiow of the DTC in fall. As the STC, the northward transport is strongest in winter and weakest in summer, while the southward transport is strongest in summer and weakest in spring. This seasonal difference may be associated with the DTC. The zonal wind stress and the east-west slope of sea level play important roles in the seasonal variations of the TC, the STC and the DTC.

Eddy properties in the Pacific sector of the Southern Ocean from satellite altimetry data

Mesoscale eddies play a key role in the ocean dynamics of the Southern Ocean, and eddy response to the climate changes has also been widely noted. Both eddy kinetic energy（EKE） and eddy detection algorithm are used to study the eddy properties in the Pacific sector of the Southern Ocean. Consistent with previous works,the maps of the EKE illustrate that higher energy confines to the Antarctic Polar Frontal Zone（APFZ） and decreases progressively from west to east. It also shows that the most significant increase in the EKE occurs in the western and central parts of the Pacific sector, where the baroclinicity of the Antarctic Circumpolar Current（ACC） is much stronger. Statistical eddy properties reveal that both of the spatial pattern and interannual variation of the EKE are primarily due to the eddy amplitude and the eddy rotational speed, rather than the eddy number or the eddy radius. In general, these results furtherly confirm that anomalous westerly wind forcing associated with the positive Southern Annular Mode（SAM） index enhances the Southern Ocean eddy activity by strengthening the eddy properties.

不同强度有氧运动对脑卒中患者凝血功能的影响

目的检测不同强度有氧训练前后脑卒中患者凝血六项,探讨不同强度有氧运动对脑卒中凝血功能的影响。方法收集2015年1月至2016年12月在重庆市肿瘤医院脑外科初发脑卒中患者120例,根据心肺运动试验,结合随机数字表法将患者分为中强度有氧运动组、低强度有氧运动组及对照组。对照组维持神经内科初发脑卒中基本药物等治疗,中强度有氧运动组、低强度有氧运动组在对照组基础上,以不同强度踩踏功率自行车进行训练。分析比较3组间运动训练前后凝血六项[血浆纤维蛋白原(FIB)、D-二聚体(D-D)、活化部分凝血活酶时间(APTT)、凝血酶原时间(PT)、国际标准化比值(INR)和凝血酶时间(TT)]指标的差异。结果结果显示3组间运动训练前凝血指标差异无统计学意义(P>0.05)。中强度组运动训练后FIB、D-D水平显著低于训练前,低强度组运动训练后仅有FIB水平显著低于训练前,且差异具有统计学意义(P<0.05);中强度组、低强度组其余指标运动前后差异无统计学意义(P>0.05)。对照组基础治疗前后各凝血指标差异无统计学意义(P>0.05)。运动训练后,中强度组FIB水平显著低于低强度组,而低强度组显著低于对照组,且差异具有统计学意义(P<0.05)。结论中、低强度有氧运动可在一定程度上影响脑卒中患者凝血功能,其中中强度有氧运动更为显著,为临床科学、个体化有氧运动结合药物防治脑卒中再发提供了科学依据。

The water mass variability and southward shift of the Southern Hemisphere mid-depth supergyre

The Southern Hemisphere subtropical supergyre at intermediate depths connects all three ocean basins and plays a significant role in responding and conveying the climate-change-related variations in the glob- al ocean. On the basis of the Simple Ocean Data Assimilation/SODA） ocean reanalysis, the thermohaline variability and southward shift of the mid-depth supergyre are demonstrated. The steric height of the sub- surface relative to 1 500 m （400-1 500 m） from the SODA depicts exactly the flow patterns and variability of the oceanic supergyre. During 1958-2007 the water masses in the gyre interiors become cooler/fresher, with the significant exceptions of the Agulhas Current system and Agulhas leakage. The results also exhibit a pronounced strengthening of the inter-basin connection of the supergyre, and the strongest southward shift, by about 2.5° over the whole period, occurs in the central-south Pacific, which is associated with the changes in the basin-scale wind forcing.

Fronts,baroclinic transport,and mesoscale variability of the Antarctic Circumpolar Current in the southeast Indian Ocean

Fronts, baroclinic transport, and mesoscale variability of the Antarctic Circumpolar Current （ACC） along 115°E are examined on the basis of CTD data from two hydrographic cruises occupied in 1995 as a part of the World Ocean Circulation Experiment （WOCE cruise I9S） and in 2004 as a part of CLIVAR/CO2 repeat hydrography program. The integrated baroclinic transport across I9S section is （97.2×106±2.2×106） m3/s relative to the deepest common level （DCL）. The net transport at the north end of I9S, determined by the south Australian circulation system, is about 16.5× 106 m3/s westward. Relying on a consistent set of water mass criteria and transport maxima, the ACC baroclinic transport, （117×106±6.7×106） m3/s to the east, is carried along three fronts： the Subantarctic Front （SAF） at a mean latitude of 44°-49°S carries （50.6×106=t=13.4×106） m3/s; the Polar Front （PF）, with the northern branch （PF-N） at 50.5°S and the southern branch （PF- S） at 58°S, carries （51.3×106±8.7×106） m3/s; finally, the southern ACC front （SACCF） and the southern boundary of the ACC （SB） consist of three cores between 59°S and 65°S that combined carry （15.2× 106±1.8× 106） m3/s. Mesoscale eddy features are identifiable in the CTD sections and tracked in concurrent maps of altimetric sea level anomalies （SLA） between 44°-48°S and 53°-57°S. Because of the remarkable mesoseale eddy features within the SAF observed in both the tracks of the cruises, the eastward transport of the SAF occurs at two latitude bands separating by 1°. Both the CTD and the altimetric data suggest that the mesoscale variability is concentrated around the Antarctic Polar Frontal Zone （APFZ） and causes the ACC fronts to merge, diverge, and to fluctuate in intensity and position along their paths.

超高清SDI over IP架构设计

基于以太网交换机的IP化架构,可以有效解决传统SDI接口,由于自身带宽等缺陷无法满足4K超高清信号传输的困难,设计一个SDI over IP架构,提供更大的带宽,满足4K信号的安全传输,而且信号吞吐量更加便捷,符合当下5G技术发展要求。

The seasonal variation of the North Pacific Meridional Overturning Circulation heat transport

Based on the 50-year Simple Ocean Data Assimilation (SODA) reanalysis data, we investigated the basic characteristics and seasonal changes of the meridional heat transport carried by the North Pacific Meridional Overturning Circulation. And we also examined the dynamical and thermodynamic mechanisms responsible for these heat transport variability at the seasonal time scale. Among four cells, the tropical cell (TC) is strongest with a northward heat transport (NHT) of (1.75±0.30) PW (1 PW=1.0×10^15 W) and a southward heat transport (SHT) of (-1.69±0.55) PW, the subtropical cell (STC) is second with a NHT of (0.71±0.65) PW and SHT of (-0.63±0.53) PW, the deep tropical cell (DTC) is third with a NHT of (0.18±0.03) PW and SHT of (-0.18±0.11) PW, while the subpolar cell (SPC) is weakest with a NHT of (0.09±0.05) PW and SHT of (-0.07±0.09) PW. These four cells all have diff erent seasonal changes in their NHT and SHT. Of all, the TC has stronger change in its SHT than in its NHT, so do both the DTC and SPC, but the seasonal change in the STC SHT is weaker than that in its NHT. Therefore, their dynamical and thermodynamic mechanisms are diff erent each other. The local zonal wind stress and net surface heat flux are mainly responsible for the seasonal changes in the TC and STC NHTs and SPC SHT, while the local thermocline circulations and sea temperature are primarily responsible for the seasonal changes of the TC, STC and DTC SHTs and SPC NHT.

The mean properties and variations of the Southern Hemisphere subpolar gyres estimated by Simple Ocean Data Assimilation(SODA) products

Based on the Simple Ocean Data Assimilation （SODA） products, we study the mean properties and variations of the Southern Hemisphere subpolar gyres （SHSGs） in this paper. The results show that the gyre strengths in the SODA estimates are （55.9±9.8）×108 ma/s for the Weddell Gyre （WG）, （37.0±6.4） ×106 ma/s for the Ross Gyre （RG）, and （27.5±8.2）x 106 ma/s for the Australian-Antarctic Gyre （AG）, respectively. There exists distinct connectivity between the adjacent gyres and then forms an oceanic super gyre structure in the southern subpolar oceans. And the interior exchanges are about （8.0±3.2）× 106 ma/s at around 70°E and （4.3±3.1）× 106 m3/s at around 140°E. The most pronounced variation for all three SHSGs occurs on the seasonal time scale, with generally stronger （weaker） SHSGs during austral winter （summer）. And the seasonal changes of the gyre structures show that the eastern boundary of the WG and AG extends considerably further east during winter and the interior exchange in the super gyre structure increases accordingly. The WG and RG also show significant semi-annual changes. The correlation analyses confirm that the variations of the gyre strengths are strongly correlated with the changes in the local wind forcing on the semi-annual and seasonal time scales.

The influence of background waves on internal solitary waves after the transit of Typhoon Neast in the northern South China Sea

On the basis of the time series observations from a temperature chain and an acoustic Doppler current profiler on the continental shelf of the northern South China Sea, a sequence of internal solitary waves （ISWs） and background waves （BWs, including internal tides and near-inertial waves） on the continental shelf were captured simultaneously after the transit of Typhoon Neast in October 2011. These measurementsprovided a unique opportunity to explore the influence of BWs on the ISWs. The BWs appeared a conversion on the current strength and vertical mode structure during the observational period. The BWs were dominated by weak and mode-one waves before October 2 and then turned to strong and high-mode waves after that time. Meanwhile, the ISWs displayed different wave structures before and after October 2, which was closely related to BWs＇ changes. According to the current profiles of BWs, the high-mode wave structure with strong current could significantly strengthen the vertical shear of ISWs in the near-surface layer and promote the breaking of ISWs, and thus it may play an important role in affecting the background current condition.

MTP副产混合芳烃蒸馏切割馏分段组分分布研究

以MTP副产混合芳烃为研究对象,采用实沸点蒸馏仪分别以90℃、95℃、100℃为一次切割点,利用气相色谱分析蒸馏切割后的馏分段组分含量,考察切割点对蒸馏切割馏分段组分分布的影响。结果表明:<90℃、<95℃及<100℃馏分均可分离出芳烃含量≯3%,苯含量≯0.5%,总二烯烃含量<1%,烯烃含量≮30%的轻组分,且<100℃馏分段收率最高可达45%,该馏分组分与MTP工艺循环烃较为相似;>90℃、>95℃及>100℃馏分均可分离出芳烃含量≮35%,苯含量≯0.5%,总二烯烃含量<1%、烯烃含量≯40%的重组分,>100℃馏分收率达到50%,该馏分芳烃富集程度较高。