检索结果-南通市图书馆

维普期刊数据库博看期刊

Classification of Four-Qubit States by Means of a Stochastic Local Operation and the Classical Communication Invariant

在线全文

学校读者我要写书评

暂无评论

Chinese Physics Letters 2011年第2期28卷 24-27页

作者： zha Xin-Wei MA gang-long School of Science Xi’an University of Posts and TelecommunicationsXi’an 710121

It is a recent observation that entanglement classification for qubits is closely related to stochastic local operations and classical communication(SLOCC)*** et al.[***.A 65(2002)052112]showed that for pure states of four qubits there are nine different degenerate SLOCC entanglement *** et al.[***.A 76(2007)052311]showed that there are at least 28 distinct true SLOCC entanglement classes for four qubits by means of the SLOCC invariant and *** give 16 different entanglement classes for four qubits by means of basic SLOCC invariants.

关键词： invariants invariant operations

Multi-dimensional controllability analysis of precision ball bearing integrity

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Advances in Manufacturing 2023年第4期11卷 682-693页

作者： Lai Hu Jun zha Wei-Hua zhao Xiao-Fei Peng Yao-long Chen School of Mechanical Engineering Xi’an Jiaotong UniversityXi’an710049People’s Republic of China State Key Laboratory for Manufacturing Systems Engineering Xi’an Jiaotong UniversityXi’an710054People’s Republic of China Luoyang Bearing Science and Technology Co. Ltd.Luoyang471039HenanPeople’s Republic of China

Many factors affect the integrity of precision ball *** this study,the multi-dimensional controllability of precision ball bearings produced in different company brands(bearing A and bearing B)were studied and *** geometric errors(flatness,parallelism,roundness and cylindricity of inner and outer rings,roundness,groove and roughness of inner and outer rings)and vibration errors of bearings were ***,the residual stress,residual austenite content,element content ratio,metamorphic layer and temperature-vibration displacement coupling test were also *** on the above analysis conclusion,the bearing fatigue life test was carried out for 2150 *** reliability of the conclusion is proved again as *** the residual austenite content in the raceway of precision ball bearing is 10%,the axial residual stress is 877.4 MPa;the tangential residual stress is 488.1 MPa;the carbon content is 6%;the test temperature of bearing is the lowest;and the service life is prolonged.

关键词： Precision ball bearing Controllability geometric errors Carbon content Residual austenite Residual stress

Advances in biotechnological production of santalenes and santalols

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Herbal Medicines 2021年第1期13卷 90-97页

作者： Wen-long zha Jia-chen Zi Biotechnological Institute of Chinese Materia Medica Jinan UniversityGuangzhou 510632China College of Pharmacy Jinan UniversityGuangzhou 510632China

Sandalwood essential oil has been widely used not only as natural medicines but also in perfumery and food industries, with sesquiterpenoids as its major components including(Z)-a-santalol and(Z)-bsantalol and so on. The mature heartwoods of Santalum album, Santalum austrocaledonicum and Santalum spicatum are the major plant resources for extracting sandalwood essential oil, which have been overexploited. Synthetic biology approaches have been successfully applied to produce natural products on large scale. In this review, we summarize biosynthetic enzymes of santalenes and santalols, including various santalene synthases(STSs) and cytochrome P450 monooxygenases(CYPs), and then highlight the advances of biotechnological production of santalenes and santalols in heterologous hosts, especially metabolic engineering strategies for constructing santalene-and santalol-producing Saccharomyces cerevisiae.

关键词： biosynthesis biotechnological production sandalwood oil santalenes santalols

Effect of cyclic drying and wetting on engineering properties of heavy metal contaminated soils solidified/stabilized with fly ash

在线全文

学校读者我要写书评

暂无评论

Journal of Central South University 2013年第7期20卷 1947-1952页

作者： zha Fu-sheng LIU Jing-jing XU long CUI Ke-rui Key Laboratory of geotechnical and Underground Engineering of Ministry of Education (Tongji University) Shanghai 200092 China School of Resource and Environmental Engineering Hefei University of Technology Hefei 230009 China

Solidification/stabilization （S/S） is one of the most effective methods of dealing with heavy metal contaminated soils. The effects of cyclic wetting and drying on solidified/stabilized contaminated soils were investigated. A series of test program, unconfined compressive strength （UCS） test, TCLP leaching test and scanning electron microscopy （SEM） test, were performed on lead and zinc contaminated soils solidified/stabilized by fly ash. Test results show that UCS and the leaching characteristics of heavy metal ions of S/S contaminated soils are significantly improved with the increase of fly ash content. UCS of S/S soils firstly increases with the increase of the times of drying and wetting cycles, after reaching the peak, it decreases with it. When the pollutant content is lower （1 000 mg/kg）, the TCLP concentration first slightly decreases under cyclic drying and wetting, then increases, but the change is minor. The TCLP concentration is higher under a high pollutant content of 5 000 mg/kg, and increases with the increase of the times of drying and wetting cycles. The results of scanning electron microscopy （SEM） test are consistent with UCS tests and TCLP leaching tests, which reveals the micro-mechanism of the variations of engineering properties of stabilized contaminated soils after drying and wetting cycles.

关键词： solidification/stabilization (S/S) heavy metal contaminated soil drying and wetting cycles long-term stability

Research status and prospects of melt refining and purification technology of magnesium alloys

在线全文

学校读者我要写书评

暂无评论

Journal of Magnesium and Alloys 2019年第3期7卷 370-380页

作者： Hanxue Cao Mengtao Huang Chengcheng Wang Siyuan long Jili zha.guoqiang You College of Materials Science and Engineering Chongqing UniversityChongqing 400044China National Engineering Research Center for Magnesium Alloys Chongqing UniversityChongqing 400044China Chongqing Automotive Collaborative Innovation Center Chongqing UniversityChongqing 400044China

Refining and purification is a significant way to obtain pure and high-quality magnesium alloy *** paper summarizes the flux refining methods and non-flux purification methods(blowing purification,filtration purification,electromagnetic purification and ultrasonic purification).It also introduces the composite refining technologies that have been widely researched and applied in recent years,including low-voltage pulse electromagnetic technology,ultrasonic argon purification,self-purification technology and non-flux continuous purification *** them,the non-flux continuous purification technology integrates a variety of purification methods,which can produce high-quality magnesium alloy continuously and steadily,realize environmental protection production,and achieve remarkable technical and economic benefits.

关键词： Magnesium alloy Purification method Inclusions Mechanical properties

Inhibition of Eukaryotic Initiating Factor eIF4E Overcomes Abemaciclib Resistance in gastric Cancer

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Current Medical Science 2023年第5期43卷 927-934页

作者： Huo-long zha Wei CHEN Wei SHI Ying-ying LIAO Department of gastroenterology Renmin HospitalHubei University of MedicineShiyan 442000China Department of Critical Care Medicine Taihe HospitalHubei University of MedicineShiyan 442000China

Objective Aberrant activating mutations in cyclin-dependent kinases 4 and 6(CDK4/6)are common in various cancers,including gastroesophageal *** CDK4/6 inhibitors,such as abemaciclib and palbociclib,have been approved for breast cancer treatment,their effectiveness as a monotherapy remains limited for gastroesophageal *** present study explored the underlying mechanism of abemaciclib *** Abemaciclib-resistant gastric cancer cell lines were generated,and the phospho-eukaryotic translation initiation factor 4E(p-eIF4E)and eIF4E expression was compared between resistant and parental cell *** order to analyze the role of eIF4E in cell resistance,siRNA knockdown was *** effectiveness of ribavirin alone and its combination with abemaciclib was evaluated in the gastric cancer xenograft mouse *** The upregulation of eIF4E was a common feature in gastric cancer cells exposed to prolonged abemaciclib *** cancer cells with increased eIF4E levels exhibited a better response to eIF4E inhibition,especially those that were resistant to ***,which is an approved anti-viral drug,significantly improved the efficacy of abemaciclib,both in vitro and in vivo,by inhibiting ***,ribavirin effectively suppressed the abemaciclib-resistant gastric cancer growth in mice without causing *** These findings suggest that targeting eIF4E can enhance the abemaciclib treatment for gastric cancer,proposing the potential combination therapy of CDK4/6 inhibitors with ribavirin for advanced gastric cancer.

关键词： eIF4E CDK4/6 ribavirin gastric cancer resistance

A review:biosynthesis of plant-derived labdane-related diterpenoids

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Natural Medicines 2021年第9期19卷 666-674页

作者： gAO Ke zha Wen-long ZHU Jian-Xun ZHENg Cheng ZI Jia-Chen College of Pharmacy Jinan UniversityGuangzhou 510632China Zhejiang Institute for Food and Drug Control NMPA Key Laboratory for Quality Evaluation of Traditional Chinese MedicineHangzhou 310052China State Key Laboratory of Bioactive Substance and Function of Natural Medicines Institute of Materia MedicaChinese Academy of Medical Sciences&Peking Union Medical CollegeBeijing 100050China

Plant-derived labdane-related diterpenoids(LRDs)represent a large group of *** possess either a labdane-type bicyclic core structure or more complex ring systems derived from labdane-type skeletons,such as abietane,pimarane,kaurane,*** to their various pharmaceutical activities and unique properties,many of LRDs have been widely used in pharmaceutical,food and perfume *** of various LRDs has been extensively studied,leading to characterization of a large number of new biosynthetic *** biosynthetic pathways of important LRDs and the relevant enzymes(especially diterpene synthases and cytochrome P450 enzymes)were summarized in this review.

关键词： Biosynthesis Cytochrome P450 enzyme Diterpene synthase Labdane-related diterpenoids

Integrated intrusion detection model based on artificial immune

在线全文

学校读者我要写书评

暂无评论

The Journal of China Universities of Posts and Telecommunications 2014年第2期21卷 83-90页

作者： zha.g Ling BAI Zhong-ying LU Yun-long zha Ya-xing LI Zhen-wen School of Computer Science Beijing University of Posts and Telecommunications Zhengzhou University of Light Industry

The author puts forward an integrated intrusion detection （ID） model based on artificial immune （IIDAI）, a vaccination strategy based on the significance degree of genes and a method to generate initial memory antibodies with rough set （RS）. IIDAI integrates two kinds of intrusion detection mode： misuse detection and anonymous detection. Misuse detection and anonymous detection are applied to detect the known and the unknown attacks, respectively. On the basis of IIDAI model, an ID algorithm is presented. Simulation shows that the IIDAI has better performance than traditional ID methods in feasibility and effectiveness. It is very prone to achieve a higher convergence rate by using the vaccination strategy. Moreover, RS can remove the redundancy attributes and increase the detection speed. It can also increase detection rate by applying the integrated method.

关键词： ID RS artificial immune vaccination

大跨径预应力混凝土连续梁桥施工监控技术研究

在线全文

学校读者我要写书评

暂无评论

价值工程 2025年第1期44卷 62-64页

作者：查李剑上海同济检测技术有限公司上海201900

桥梁结构理想的几何线形与合理的内力状态不仅与设计有关,而且还依赖于科学合理的施工方法。如何通过施工时的浇筑过程的控制以及结构标高调整来获得预先设计的应力状态和几何线形,是大跨桥梁施工中非常关键的问题。因此,在对大跨度预... 详细信息

桥梁结构理想的几何线形与合理的内力状态不仅与设计有关,而且还依赖于科学合理的施工方法。如何通过施工时的浇筑过程的控制以及结构标高调整来获得预先设计的应力状态和几何线形,是大跨桥梁施工中非常关键的问题。因此,在对大跨度预应力混凝土桥梁施工过程中,为了保障其施工质量及安全性,应采取必要的监控技术对其进行检测。本文以实际工程为例,对监控技术进行总结,为类似大跨度预应力混凝土桥梁施工监控提供借鉴作用。

关键词：预应力混凝土悬臂桥梁施工监控