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基于DFSS方法优化52^(#)费托蜡的制备工艺

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化工进展 2024年第4期43卷 1742-1753页

作者：蒋晨光张胜振张翠清郭屹孙永伟北京低碳清洁能源研究院北京102211

以煤间接液化的加氢精制减三线油为原料,采用溶剂萃取-结晶的方法制备52^(#)费托蜡,并通过六西格玛设计对制备工艺进行开发。利用响应曲面设计中的中心复合设计建立响应值含油量、收率、熔点与剂油比、溶剂比、结晶时间、降温速率、结... 详细信息

以煤间接液化的加氢精制减三线油为原料,采用溶剂萃取-结晶的方法制备52^(#)费托蜡,并通过六西格玛设计对制备工艺进行开发。利用响应曲面设计中的中心复合设计建立响应值含油量、收率、熔点与剂油比、溶剂比、结晶时间、降温速率、结晶温度之间的数学模型,深入分析了各考察因素及其间的交互作用对响应值的影响。通过优化实验结果,验证模型,得到最佳的制备工艺参数组合以及较优的操作窗口,指导100kg/h中试试验顺利进行。研究结果表明:当剂油比为5、溶剂比为2、结晶时间6min、结晶温度5℃、降温速率为5.3℃/min时,实验室小试和中试试验产品蜡的熔点在52~54℃,含油量为0.2%~0.8%(质量分数),收率均大于25%(质量分数),产品符合国标GB/T446—2010《全精炼石蜡》的要求;实验值和模型预测值较为接近,模型的拟合效果好,预测精度高,质量可靠。

关键词： 52#费托蜡萃取结晶六西格玛响应曲面设计

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青山逆势扩增经营战略定位与策略分析

福建冶金 2024年第3期53卷 51-54页

作者：孙勇伟刘智鹏福建青拓实业股份有限公司福建福安355000

在全球经济下行压力巨大、贸易壁垒加剧、行业竞争激烈的背景下,青山依然在扩建增产,逆流而上。本文分析了青山通过在经营方面的战略定位与策略,研究青山在建立绝对的成本优势和质量品质,完善产业链打造规模结构经济方面的具体措施,探... 详细信息

在全球经济下行压力巨大、贸易壁垒加剧、行业竞争激烈的背景下,青山依然在扩建增产,逆流而上。本文分析了青山通过在经营方面的战略定位与策略,研究青山在建立绝对的成本优势和质量品质,完善产业链打造规模结构经济方面的具体措施,探讨青山推动实现企业经营的高质量发展,打造核心竞争力,从而得以持续保持核心竞争力在残酷的市场竞争中立于不败之地的因素。

关键词：逆全球化经营策略产业链核心竞争力

固体废物固化稳定化处理下重金属有效态含量变化研究

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中国资源综合利用 2024年第4期42卷 8-11页

作者：张传奇孙永伟胡阳阳江西省地质局第十地质大队江西鹰潭335000

采选矿固体废物含有大量重金属,随意堆放容易污染周边农田,影响农产品安全及人体健康。试验以某选矿厂遗留废渣为处置对象,采用两种固化稳定化工艺(制砖和制水泥熟料)对其进行处理,研究重金属有效态含量(As和Cd)的变化。结果表明,两种... 详细信息

采选矿固体废物含有大量重金属,随意堆放容易污染周边农田,影响农产品安全及人体健康。试验以某选矿厂遗留废渣为处置对象,采用两种固化稳定化工艺(制砖和制水泥熟料)对其进行处理,研究重金属有效态含量(As和Cd)的变化。结果表明,两种固化稳定化工艺均能有效处置固体废物,控制重金属污染,As和Cd有效态的固化率均不低于98.3%。相比制砖物料,成品砖的As和Cd有效态含量进一步降低,其中As有效态含量降低79.8%,Cd有效态含量降低80%。制砖后,重金属As和Cd得到有效的固化。制砖物料及水泥熟料的As和Cd有效态含量基本一致,其固化稳定化效果无明显差异。制砖物料的废渣掺量远高于水泥熟料,前者消纳废渣的能力比后者强,但水泥熟料的后续产品为水泥,制砖物料的后续产品为砖,水泥的稳定性远高于砖,两种工艺都能满足重金属固化稳定化要求。

关键词：固体废物固化稳定化重金属有效态含量制砖制水泥熟料

Electrostatic Discharge Effects on the High-voltage Solar Array

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高电压技术 2013年第10期39卷 2392-2397页

作者： YUAN Qingyun sun yongwei CAO Hefei LIU Cunli Electromagnetic Environment Effect Key Laboratory Mechanical Engineering College Shijiazhuang 050003 China

A certain number of charges are deposited on the surface of high-voltage solar array because of effects of space plasma,high-energy charged particles,and solar illumination,hence the surface is *** of electrostatic discharge(ESD) occur on the surface when the deposited charges exceed a threshold *** this paper,the mechanism of this ESD is *** ground simulation experiment of the ESD using spacecraft material under surface charging is described,and a novel ESD protecting method for high-voltage solar array,*** active protecting method based on the local strong electric field array is *** results show that the reversal potential gradient field between the cover surface and the substrate materials of high-voltage solar array is a triggering factor for the ESD on the *** threshold voltage for the ESD occurring on the surface is about 500 *** charged particles could be deflected using the electric field active protecting method,and hence the ESD on the surface is avoided even when the voltage on the conductor array increases to a certain *** results pave the way for further developing the protecting measures for high-voltage solar arrays.

关键词：静电放电太阳电池阵太阳能电池阵列电效应高能带电粒子表面充电高压保护方法

Effects of combined procedure and devascularization alone on hyperdynamics of the portal venous system in patients with portal hypertension

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Frontiers of Medicine 2008年第3期2卷 244-247页

作者： Rong HUA yongwei sun Zhiyong WU Department of General Surgery Renji HospitalSchool of MedicineShanghai Jiaotong UniversityShanghai 200127China

Shunts and devascularizations have totally dif-ferent effects on the hemodynamics of the portal venous *** actual results of pericardial devascularization(PCDV)alone and conventional splenorenal shunt com-bined with pericardial devascularization(combined pro-cedure,CP)should be determined by more clinical *** study aimed to evaluate effects on hemodynamics in the portal venous system after CP and PCDV *** 20 patients who received CP and 18 who received PCDV,hemodynamic parameters of the portal venous system were studied by magnetic resonance angio-graphy 1 week before and 2 weeks after *** portal pressure(FPP)was continuously detected by a transducer during the *** to the pre-operative data,a decreased flow in the portal vein(PVF)[(563.12±206.42)mL/min vs(1080.63±352.85)mL/min,P,0.05],a decreased portal vein diameter(PVD)[(1.20±0.11)cm vs(1.30±0.16)cm,P<0.01],a decreased FPP[(21.50±2.67)mmHg vs(29.88±2.30)mmHg,P<0.01]and an increased flow in the superior mesenteric vein(SMVF)[(1105.45±309.03)mL/min vs(569.13±178.46)mL/min,P<0.05]were found in the CP group after operation;a decreased PVD[(1.27±0.16)cm vs(1.40±0.23)cm,P<0.05],a decreased PVF[(684.60±165.73)mL/min vs(1175.64±415.09)mL/min,P<0.05],a decreased FPP[(24.40±3.78)mmHg vs(28.80±3.56)mmHg,P<0.05]and an increased SMVF[(697.91±121.83)mL/min vs(521.30±115.82)mL/min,P<0.05]were observed in the PCDV *** operation,PVF in the CP group[(563.12±206.42)mL/min vs(684.60±165.73)mL/min,P<0.05]had no significant decrease,while FPP[(21.50±2.67)mmHg vs(24.40±3.78)mmHg,P<0.01]had a significant decrease as compared with that in the PCDV *** and FPP could be decreased by both surgical procedures,but the effect of decreasing FPP was much better in the combined procedure than in PCDV ***,there was no significant difference in PVF between the two *** is suggested that the combined surgical procedure could integrate the advan-tages of shunting with tho

关键词： hypertension,portal hemodynamics sple-norenal shunt,surgical

Cambricon-QR:a sparse and bitwise reproducible quantized training accelerator

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High Technology Letters 2024年第1期30卷 52-60页

作者：李楠 ZHAO yongwei ZHI Tian LIU Chang DU Zidong HU Xing LI Wei ZHANG Xishan LI Ling sun Guangzhong School of Computer Science and Technology University of Science and Technology of ChinaHefei 230026P.R.China State Key Laboratory of Processors Institute of Computing TechnologyChinese Academy of SciencesBeijing 100086P.R.China Cambricon Tech.Ltd Beijing 100191P.R.China Institute of Software Chinese Academy of SciencesBeijing 100086P.R.China

Quantized training has been proven to be a prominent method to achieve deep neural network training under limited computational *** uses low bit-width arithmetics with a proper scaling factor to achieve negligible accuracy ***-Q is the ASIC design proposed to efficiently support quantized training,and achieves significant performance ***,there are still two caveats in the ***,Cambricon-Q with different hardware specifications may lead to different numerical errors,resulting in non-reproducible behaviors which may become a major concern in critical ***,Cambricon-Q cannot leverage data sparsity,where considerable cycles could still be squeezed *** address the caveats,the acceleration core of Cambricon-Q is redesigned to support fine-grained irregular data *** new design not only enables acceleration on sparse data,but also enables performing local dynamic quantization by contiguous value ranges(which is hardware independent),instead of contiguous addresses(which is dependent on hardware factors).Experimental results show that the accuracy loss of the method still keeps negligible,and the accelerator achieves 1.61×performance improvement over Cambricon-Q,with about 10%energy increase.

关键词： quantized training sparse accelerator Cambricon-QR

Generation of Targeted Point Mutations in Rice by a Modified CRISPR/Cas9 System

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Molecular Plant 2017年第3期10卷 526-529页

作者： Jingying Li yongwei sun Jinlu Du Yunde Zhao Lanqin Xia Institute of Crop Sciences (ICS) Chinese Academy of Agricultural Sciences (CAAS) Beijing 100081 China National Key Laboratory of Crop Genetic Improvement and National Center of Plant Gene Research (Wuhan) Huazhong Agricultural University Wuhan 430070 China Section of Cell and Developmental Biology University of California San Diego La Jolla CA 92093-0116 USA These authors contributed equally to this article

CRISPR/Cas9 （Clustered Regularly Interspaced Short Palin- dromic Repeats/CRISPR-associated Cas9 endonuclease）- mediated genome editing has revolutionized biological research and crop improvement because of its speci... 详细信息

关键词： Targeted Point Mutations Modified CRISPR/Cas9 System Short Palindromic

High temperature super-conducting(HTS) C-band oscillator with phase noise of -134 dBc/Hz

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Chinese Science Bulletin 2002年第5期47卷 422-424页

作者： LI Hong HE Aisheng SHI Tiefeng GONG Zhonglin LI Shunzhou sun yongwei HE Yusheng Institute of Physics Chinese Academy of SciencesBeijing 100080China North University of Technology Beijing 100141China Beijing Institute of Radio Measurement Beijing 100080China Department of Electronics Peking UniversityBeijing 100871Giina Institute of Acoustics Chinese Academy of SciencesBeijing 100080China Chongqing University Chongqing 400044China

A high Q HTS cavity resonator with resonating frequency f0=5.624 GHz was fabricated using high quality HTS film and high purity sapphire. The unloaded quality factor of the HTS resonator was as high as QU=1.09×106 at the nitrogen temperature, 77 K. A HTS local oscillator combining the high Q cavity resonator with a C-band low noise GaAs HEMT amplifier was then designed and constructed. The phase noise of the oscillator, measured by a HP 3048A noise measurement system, is -134 dBc/Hz at 10 kHz offset when the temperature is 77 K. This result is close to the best level reported by other groups in the world.

关键词： HTS cavity resonator low phase noise HTS local oscil-lator.

Post-combustion slipstream CO_(2)-capture test facility at Jiangyou Power Plant,Sichuan,China:facility design and validation using 30% wt monoethanolamine(MEA)testing

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Clean Energy 2020年第2期4卷 107-119页

作者： Baodeng Wang Qian Cui Guoping Zhang Yinhua Long yongwei sun Xinglei Zhao Zhendong He Anthony Y.Ku National Institute of Clean-and-Low-Carbon Energy Future Science CityChangping DistrictBeijingChina Shenhua Sichuan Energy Co. Ltd.Jiangyou Power PlantSichuanChina NICE America Research Inc. 2091 Stierlin CtMountain ViewCA 94043USA

Given the dominant share of coal in China’s energy-generation mix and the fact that>50% of the power plants in the country are currently<15 years old,efforts to significantly reduce China’s CO_(2) footprint will require the deployment of CO_(2) capture across at least part of its fleet of coal-fired power ***_(2)-capture technology is reaching commercial maturity,but it is still necessary to adapt the technology to regional conditions,such as power-plant design and flexible operation in the China *** facilities provide valuable field data to support the commercialization of CO_(2) *** have built a slipstream facility at Jiangyou power plant in Sichuan that will allow us to explore China-relevant issues,especially flexible operation,over the next few *** plan to share our results with the broader CO_(2)-capture and CO_(2)-storage(CCS)community to accelerate the deployment of CCS in *** paper describes the design of the slipstream facility and presents results from our steady-state qualification tests using a well-studied benchmark solvent:30% wt monoethanolamine(MEA).The results from our MEA tests compare favorably to results reported from other slipstream-test facilities around the world,allowing us to commission our system and establish a reference baseline for future studies.

关键词： CO_(2)capture coal-fired power plant CCS monoethanolamine MEA pilot