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High tension cyclic hydrocarbons synthesized from biomass-derived platform molecules for aviation fuels in two steps

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Green Energy & Environment 2023年第1期8卷 331-337页

作者： Zhanchao Li yizhuo wang Qing Li Liqing Xu Hong wang Frontier Institute of Science and Technology Xi'an Jiaotong UniversityXi'an710054China State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong UniversityXi'an710054China

Synthesizing ring structure aviation fuels from biomass-derived platform molecules is challenging,especially for bridged ring structure aviation fuels which are typically achieved from fossil-derived ***,we report the synthesis of a series of ring structure biofuels in two steps by a combination of a solvent-free Michael-cyclization reaction and a hydrodeoxygenation(HDO)reaction from lignocellulosederived 5,5-dimethyl-1,*** biofuels are obtained with high overall yields up to 90%,which exhibit high densities of 0.81 g cm^(-3)-0.88 g cm^(-3)and high volumetric neat heat of combustion(VNHOC)values of 36.0 MJ L^(-1)-38.6 MJ L^(-1).More importantly,bridged-ring structure hydrocarbons can also be achieved in two steps by a combination of a Robinson annulation reaction and an HDO reaction to afford the final products at high overall yields up to 90%.The bridged-ring structure products have comparable high densities and high VNHOC values to the best artificial fuel JP-10(0.94 g cm^(-3)and 39.6 MJ L^(-1)).The results demonstrate a promising way for the synthesis of high-density aviation fuels with different fuel properties at high yields.

关键词： Biofuels 5,5-Dimethyl-1,3-cyclohexanedione Solvent-free Michael-cyclization Robinson annulation Green reaction

Control Structure Analysis and Recovery of Embedded Binaries

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Chinese Journal of Electronics 2017年第6期26卷 1118-1124页

作者： JI Weixing HUO Yuanhong wang yizhuo GAO Yujin SHI Feng Beijing Institute of Technology

Existing decompilers use rule-based algorithms to transform unstructured Control flow graph(CFG) into equivalent high-level programming language constructs with "goto" statements. One problem of such approaches is that they generate a large number of "goto"s in the output code, which reduce the readability and hinder the understanding of input binaries. A global search algorithm is proposed based on structural analysis. This algorithm restructures a CFG and generates fewer number of "goto" statements than the rule-based algorithm *** also present a Genetic algorithm(GA) for the global search approach to locate near optimal solutions for large CFGs. Evaluation results on a set of real CFGs show that the genetic algorithm-based heuristic for global search is capable of finding high-quality solutions.

关键词： Decompiling Control flow graph restructuring Structural analysis Genetic algorithm(GA)

Linux Kernel Data Races in Recent 5 Years

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Chinese Journal of Electronics 2018年第3期27卷 556-560页

作者： SHI Jianjun JI Weixing wang yizhuo HUANG Lifu GUO Yunkun SHI Feng Beijing Institute of Technology

Data races are increasingly seen as concurrency bugs and they are difficult to reproduce and diagnose in parallel programs. Linux kernel is a large-scale software system, in which intensive thread-level parallelism and non-deterministic thread interleaving are more prone to race conditions. This paper conducts an investigation of real Linux kernel data races in recent 5 years. Our results show that there are about 500 real kernel data races reported and fixed in recent 5 years. File systems and drivers among all modules hold a much higher percentage of race conditions than other modules. We also conduct a case-bycase study on data races and graphically show how these data races are triggered with specific thread *** analysis results are of interest to researchers and engineers who are committed to kernel data race detection and kernel development.

关键词： Data race Linux kernel Concurrency Synchronization

P-Type Chemical Doping-Induced High Bipolar Electrical Conductivities in a Thermoelectric Donor–Acceptor Copolymer

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CCS Chemistry 2021年第10期3卷 2482-2493页

作者： Jing wang yizhuo wang Qing Li Zhanchao Li Kuncai Li Hong wang Frontier Institute of Science and Technology Xi’an Jiaotong UniversityXi’an 710054 State Key Laboratory of Multiphase Flow in Power Engineering Xi’an Jiaotong UniversityXi’an 710054

Typically,conducting polymers transfer either electrons or *** is rare to see high bipolar(p-and n-type)electrical conductivities within a single bulk doped organic polymer without the assistant of gate ***,we report that FeCl3-doped solutionprocessable D–A copolymer poly(2,5-bis(2-octyldo decyl)-3,6-di(thiophen-2-yl)diketopyrrolo[3,4-c]pyrrole-1,4-dione-alt-thieno[3,2-b]thiophen)(DPPTTT)could exhibit a high p-type electrical conductivity of 130.6 S/cm and a good n-type electrical conductivity of 14.2 S/cm by engineering the doping level.

关键词： polarity switching donor-acceptor copoly mer thermoelectric organic diode p-ty pe doping

Disease-derived circulating extracellular vesicle preconditioning:A promising strategy for precision mesenchymal stem cell therapy

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Acta Pharmaceutica Sinica B 2024年第10期14卷 4526-4543页

作者： Ke Lv Tian Wu Shuyun Liu Peng Lou Pingya Zhou yizhuo wang Xiyue Zhou Shu Zhang Dan Du Yanrong Lu Meihua Wan Jingping Liu Department of Integrated Traditional Chinese and Western Medicine and NHC Key Laboratory of Transplant Engineering and Immunology Frontiers Science Center for Disease-related Molecular NetworkWest China HospitalSichuan UniversityChengdu 610041China Department of Emergency Medicine Emergency Medical LaboratoryWest China HospitalSichuan UniversityChengdu 610041China Advanced Mass Spectrometry Center Research Core FacilityFrontiers Science Center for Disease-related Molecular NetworkWest China HospitalSichuan UniversityChengdu 610041China West China Center of Excellence for Pancreatitis Institute of Integrated Traditional Chinese and Western MedicineWest China HospitalSichuan UniversityChengdu 610041China The First People’s Hospital of Shuangliu District Chengdu 610299China

Mesenchymal stem cell(MSC)-based therapies have emerged as promising methods for regenerative medicine;however,how to precisely enhance their tissue repair effects is still a major question in the *** extracellular vesicles(EVs)from diseased states carry diverse pathological information and affect the functions of recipient *** on this unique property,we report that disease-derived circulating EV(disease-EV)preconditioning is a potent strategy for precisely enhancing the tissue repair potency of MSCs in diverse disease ***,plasma EVs from lung or kidney tissue injuries were shown to contain distinctly enriched molecules and were shown to induce tissue injury-specific gene expression responses in cultured ***-EV preconditioning improved the performance(including proliferation,migration,and growth factor production)of MSCs through metabolic reprogramming(such as via enhanced oxidative phosphorylation and lipid metabolism)without inducing an adverse immune ***,compared with normal MSCs,disease-EV-preconditioned MSCs exhibited superior tissue repair effects(including anti-inflammatory and antiapoptotic effects)in diverse types of tissue injury(such as acute lung or kidney injury).Disease-derived EVs may serve as a type of“off-the-shelf”product due to multiple advantages,such as flexibility,stability,long-term storage,and ease of shipment and *** study highlights the idea that disease-EV preconditioning is a robust strategy for precisely enhancing the regenerative capacity of MSC-based therapies.

关键词： Regenerative medicine Mesenchymal stem cell Circulating extracellular vesicle Tissue injury Metabolic reprogramming Inflammation Cell death Preconditioning

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用于视频监控的运动区域质量增强可扩展编码

计算机工程 2005年第18期31卷 163-165页

作者：王一拙石峰北京理工大学计算机科学工程系北京100081

针对远程视频监控系统的特点,提出了一种混合空域分层—精细可扩展编码方法(SL-FGS)。实验表明,这种区域质量增强的SL-FGS可扩展编码方法使压缩码流具有更加灵活的带宽适应能力,并使运动区域图像质量高于其它部分。

关键词：视频监控可扩展编码精细可扩展编码运动目标检测

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基于频谱地图重构的辐射源识别

电子与信息学报 2024年第10期46卷 3949-3956页

作者：王雪刚王方刚王意卓北京交通大学电子信息工程学院北京100044

无线环境地图(REM)是呈现电磁态势的一种有效形式,考虑实际观测的不完整频谱地图受到干扰和噪声污染的问题,该文对频谱地图进行重构,并在此基础上完成辐射源识别。首先,将复杂电磁环境下的频谱地图建模为高维张量,在预处理中通过线性插... 详细信息

无线环境地图(REM)是呈现电磁态势的一种有效形式,考虑实际观测的不完整频谱地图受到干扰和噪声污染的问题,该文对频谱地图进行重构,并在此基础上完成辐射源识别。首先,将复杂电磁环境下的频谱地图建模为高维张量,在预处理中通过线性插值对其初始化补全。然后,使用视觉Transformer模型解决语义分割问题以识别频谱语义区域,区域中仅单一辐射源功率占主导,每个语义张量的低秩性得以保留。提出了一种压缩式张量分解算法,并采用交替方向乘子法(ADMM)在语义区域中重构期望信号频谱和干扰;最后,在重构的频谱地图上检测未知辐射源的位置。该方法能够充分利用频谱数据的低秩性,适用于广域多辐射源个体的电磁场景。实验结果表明,所提方法比现有方法具有更优的重构性能,降低了达到相同频谱地图恢复精度时对观测样本比例的要求,并能够准确检测辐射源。

关键词：辐射源识别频谱地图语义分割张量分解

Clinical treatment and prognostic observation for different pathological infiltrations in 537 patients with unilateral retinoblastoma

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Chinese Medical Journal 2014年第20期127卷 3581-3586页

作者： wang yizhuo Huang Dongsheng Shi Jitong Ma Jianmin Zhao Junyang Li Bin Xu Xiaolin Hu Huimin Zhou Yan Sun Yongchang Department of Pediatrics BeijingTongren Hospital Capital Medical University Beijing 100730 China Department of Ophthalmology BeijingTongren Hospital Capital Medical University Beijing 100730 China Department of Respiratory Medicine BeijingTongren Hospital Capital Medical University Beijing 100730 China

Background The use of post-enucleation adjuvant therapy to decrease the extraocular relapse rate is frequently considered, but there is much controversy about the indications for adjuvant therapy. The aim of this retrospective study was to observe the treatment and prognosis for different degrees of invasion of eye tissue in retinoblastoma （RB） and identify the indications for post-enucleation adjuvant therapy. Methods We recruited 537 children who had been diagnosed with unilateral RB and had received enucleation from January 2006 to December 2012 in our hospital, and divided them into three groups according to their number of histopathologic risk factors： 0 factor, 1 factor, or 〉2 factors. Histopathologic high-risk factors included invasion of the optic nerve posterior to the ethmoid plate （including optic nerve stumps） and extensive invasions of the choroid, sclera, anterior chamber, iris, and ciliary body. Treatment was delivered accordingly, and the prognosis of different degrees of histopathologic invasion was observed. The subjects were followed up for 6 months to 7 years （average follow-up time： 35 months）. Statistical analysis was analyzed using X2 test. P 〈0.05 was considered significant. Results Of the 537 RB patients who received enucleation, 25 died （overall survival： 95.3%）. Of the 369 （68.7%） with no histopathologic risk factors, 1 died of recurrence, with a mortality rate of 0.3%, whereas of the 168 （31.3%） with histopathologic risk factors, 26 had recurrences and 24 died （mortality rate： 14.3%; P=0.000）. Of the 93 patients （17.3%）, each of whom had a single risk factor, nine had recurrences, 16 died （8.6%）. Of the 75 patients （14%） with two or more high-risk factors, 16 died （21.3%）. These differences were statistically significant between the three （P=0.000）. Conclusion Chemotherapy is recommended for patients with histopathologic risk factors, especially those with two or more histopathologic risk factors.

关键词： retinoblastoma histopathologic, high risk factors prognosis

一步热分解法形成的MoO_(3)在无光条件下的抗菌性能

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稀有金属材料与工程 2023年第12期52卷 4200-4204页

作者：王艺卓张欢欢赵惠赵颖西安石油大学材料科学与工程学院陕西西安710065 中国科学院深圳先进技术研究院广东深圳518055

生物污损是威胁海工材料安全高效服役的重要因素,因此开发环保、成本低廉的防污材料非常必要。通过一步热分解法分别在450和750℃制备α-MoO_(3)粉末材料,即S450和S750。采用XRD、SEM、FTIR对样品进行表征。结果显示,450和750℃获得的α... 详细信息

生物污损是威胁海工材料安全高效服役的重要因素,因此开发环保、成本低廉的防污材料非常必要。通过一步热分解法分别在450和750℃制备α-MoO_(3)粉末材料,即S450和S750。采用XRD、SEM、FTIR对样品进行表征。结果显示,450和750℃获得的α-MoO_(3)分别表现为纳米级板状结构和微米级长板状结构。利用平板计数法评价2种材料在无光条件下对铜绿假单胞菌(***)的抗菌性能。结果显示,S450和S750在浓度为0.25、0.5、0.75,和1 mg/mL时,其抗菌率分别为27.3%、99%、100%、100%和16.1%、30.1%、52.3%、73.6%。表明2个条件下获得的α-MoO_(3)在无光条件下均表现出良好的抗菌性能,并且溶液pH值随α-MoO_(3)浓度的升高而降低,Mo离子溶出量随α-MoO_(3)浓度的升高而增加。α-MoO_(3)在无光条件下的抗菌活性源于H3O+和Mo离子溶出的协同作用影响。与S750相比,S450表现出更高的抗菌率,这可能源于S450在溶液中具有更高的溶解度,因而导致更多的H3O+和Mo离子溶出。

关键词： MoO_(3) 抗菌性能铜绿假单胞菌