Alternative Assessment in an EFL Project-based Learning Context: Perceptions and Correlations

This study aims to explore Chinese university EFL learners'perceptions toward alternative assessment in a context of a project-based learning digital storytelling presentation in Speaking Course.It also seeks to compare the relationship between alternative assessment and teacher assessment.The findings showed that a strong correlation between alternative assessment and teacher assessment occurred.Alternative assessment activities are viewed by students as"authentic"assessments,as they mimic how the student will be using their knowledge in the future.Alternative assessment as a form of formative assessment can be a powerful day-to-day tool for teachers and students.Alternative assessment is an enabler of process of learning.The study suggests that alternative assessment can encourage learners to become more fully responsible for their learning and can result in more and better learning.Alternative assessment can thus be used as a golden key to the"deaf and dumb"phenomenon for Chinese university EFL learners.

Smart phone-based context-aware augmentative and alternative communications system

A smartphone-based context-aware augmentative and alternative communication(AAC) was applied was in order to enhance the user's experience by providing simple, adaptive, and intuitive interfaces. Various potential context-aware technologies and AAC usage scenarios were studied, and an efficient communication system was developed by combining smartphone's multimedia functions and its optimized sensor technologies. The experimental results show that context-awareness accuracy is achieved up to 97%.

Development of a Web-Based Decision Support System for Cell Formation Problems Considering Alternative Process Routings and Machine Sequences

In this study, we use the respective advantages of the tabu search (TS) and the Web-based technologies to develop a Web-based decision support system (DSS) for cell formation (CF) problems considering alternative process routings and machine sequences simultaneously. With the assistance of our developed Web-based system, the CF practitioners in the production departments can interact with the systems without knowing the details of algorithms and can get the best machine cells and part families with minimize the total intercellular movement wherever and whenever they may need it. To further verify the feasibility and effectiveness of the system developed, an example taken from the literature is ado- pted for illustrational purpose. Moreover, a set of test problems with various sizes drawn from the literature is used to test the performance of the proposed system. Corresponding results are compared to several well-known algorithms previously published. The results indicate that the proposed system improves the best results found in the literature for 67% of the test problems. These show that the proposed system should thus be useful to both practitioners and researchers.

Three new alternative splicing variants of human cytochrome P450 2D6 mRNA in human extratumoral liver tissue

AIM: To identify the new alternative splicing variants of human CYP2D6 in human extratumoral liver tissue with RT-PCR and sequencing. METHODS: Full length of human CYP2D6 cDNAs was amplificated by reverse transcription-polymerase chain reaction (RT-PCR) from a human extratumoral liver tissue and cloned into pGEM-T vector. The cDNA was sequenced. Exons from 1 to 4 of human CYP2D6 cDNAs were also amplificated by RT-PCR from extratumoral liver tissues of 17 human hepatocellular carcinomas. Some RT-PCR products were sequenced. Exons 1 to 4 of CYP2D6 gene were amplified by PCR from extratumoral liver tissue DNA. Two PCR products from extratumoral liver tissues expressing skipped mRNA were partially sequenced. RESULTS: One of the CYP2D6 cDNAs had 470 nucleotides from 79 to 548 (3' portion of exons 1 to 5' portion of exon 4), and was skipped. Exons 1 to 4 of CYP2D6 cDNA were assayed with RT-PCR in 17 extratumoral liver tissues. Both wild type and skipped mRNAs were expressed in 4 samples, only wild type mRNA was expressed in 5 samples, and only skipped mRNA was expressed in 8 samples. Two more variants were identified by sequencing the RT-PCR products of exons 1 to 4 of CYP2D6 cDNA. The second variant skipped 411 nucleotides from 175 to 585. This variant was identified in 4 different liver tissues by sequencing the RT-PCR products. We sequenced partially 2 of the PCR products amplified of CYP2D6 exon 1 to exon 4 from extratumoral liver tissue genomic DNA that only expressed skipped mRNA by RT-PCR. No point mutations around exon 1, intron 1, and exon 4, and no deletion in CYP2D6 gene were detected. The third variant was the skipped exon 3, and 153 bp was lost. CONCLUSION: Three new alternative splicing variants of CYP2D6 mRNA have been identified. They may not be caused by gene mutation and may lose CYP2D6 activity and act as a down-regulator of CYP2D6.

Novel Fourier-based iterative reconstruction for sparse fan projection using alternating direction total variation minimization

Sparse-view x-ray computed tomography （CT） imaging is an interesting topic in CT field and can efficiently decrease radiation dose. Compared with spatial reconstruction, a Fourier-based algorithm has advantages in reconstruction speed and memory usage. A novel Fourier-based iterative reconstruction technique that utilizes non-uniform fast Fourier transform （NUFFF） is presented in this work along with advanced total variation （TV） regularization for a fan sparse-view CT. The proposition of a selective matrix contributes to improve reconstruction quality. The new method employs the NUFFT and its adjoin to iterate back and forth between the Fourier and image space. The performance of the proposed algorithm is demonstrated through a series of digital simulations and experimental phantom studies. Results of the proposed algorithm are compared with those of existing TV-regularized techniques based on compressed sensing method, as well as basic algebraic reconstruction technique. Compared with the existing TV-regularized techniques, the proposed Fourier-based technique significantly improves convergence rate and reduces memory allocation, respectively.

耳蜗神经交替声束治疗联合基于互联网的认知行为治疗对慢性特发性耳鸣的疗效研究

目的评估运用耳蜗神经交替声束治疗(CeAABT)联合基于互联网的认知行为疗法(iCBT)对慢性特发性耳鸣的有效性。方法选取诊断为慢性特发性耳鸣的患者112例随机分为2组,iCBT(56例)采取iCBT治疗,CeAABT联合iCBT组(56例)在iCBT的基础上给予CeAABT,连续治疗12周,观察2组治疗前后耳鸣残疾量表(THI)、视觉模拟量表(VAS)和耳鸣响度评分的变化情况。结果治疗后,2组患者的THI、VAS、耳鸣响度评分都出现了明显的降低,与同组治疗前比较差异均有统计学意义(P均<0.05),且CeAABT联合iCBT组THI评分(35.34±7.51)分、VAS评分(3.38±1.34)分、耳鸣响度评分(34.53±5.77)分比iCBT组[(40.13±10.95)(3.91±1.38)(39.39±6.92)分]更低,2组比较差异均有统计学意义(P均<0.05)。结论CeAABT联合iCBT可以有效地降低患者的耳鸣响度和由耳鸣带来的负面情绪,能提高慢性耳鸣患者的生活质量,是一种简便安全的耳鸣治疗方法,值得进一步研究和推广。

多视角全方位展现医学发展的大趋势——《走向整体医学》评述

袁冰先生的新作《走向整体医学》是一部探索中西医学乃至生命科学未来发展方向的方法学著作。以往对中西医学的论述大多是基于不同的理论基础,各说各话,本书则是以独特的视角和论证方法,将中西医学放在同一个语境平台进行对比研究。作者站在自然科学方法演进的制高点俯瞰,沿着自然科学、生命科学方法演进的脉络展现医学发展的大趋势,勾勒出了未来的医学发展图景。本书通过严谨而科学的论证显示:医学必然而且正在走向整合中西医学方法和知识体系。

n比特随机量子系统实时状态估计及其反馈控制

研究了n比特随机量子系统实时状态估计及其反馈控制的问题.对于连续弱测量(Continuous weak measurement, CWM)过程存在高斯噪声的情况,基于在线交替方向乘子法(Online alternating direction multiplier method,OADM)推导出一种适用于n比特随机量子系统的实时量子状态估计算法,即QSE-OADM (Quantum state estimation based on OADM).运用李雅普诺夫方法设计控制律,实现基于实时量子状态估计的反馈控制,并证明所提控制律的收敛性.以2比特随机量子系统为例进行数值仿真实验,通过与基于QST-OADM (Quantum state tomography based on OADM)算法和OPG-ADMM (Online proximal gradient-based alternating direction method of multipliers)算法的量子反馈控制方案的性能对比,验证了所提控制方案的优越性.

谷朊粉对豌豆植物蛋白肉产品特性的影响

以豌豆蛋白为原料,添加不同比例的谷朊粉,在相同条件下采用高水分(60%~80%)挤压技术制备植物蛋白肉,研究不同谷朊粉含量对产品理化性质和结构特性的影响。结果表明,随着谷朊粉含量的增加,植物蛋白肉的硬度和咀嚼度先升高后降低,弹性显著升高(P<0.05),颜色逐渐变浅,溶液的黏度增加。植物蛋白肉的复水率随着谷朊粉的增加先升高后降低,内部孔隙数量明显增加且分布变得均匀。谷朊粉的加入使植物蛋白肉的二级结构含量发生变化,无规则卷曲向β-折叠进行转化,有序结构的含量先增加后减少。综上,谷朊粉的加入能够显著改善植物蛋白肉的理化性质和结构特性,改善拉丝效果及纤维结构,提高与真肉的类似度。

生物基可持续皮革替代材料的研究现状及进展

微生物和植物材料具有可生物降解性、独特的物理机械特点,以及形成和处理过程中的无污染和可再生性等优势,可用作皮革的替代材料。文中从原料来源、制备方法等方面介绍了近年来生物基皮革替代品的研究进展,指出了目前研发存在的不足,并探讨了未来的发展趋势。

5 种毯式基质草皮的坪用和经济性状评价

无土草皮的开发及应用是保障草坪产业可持续发展的重要方向。以杂交狗牙根为材料,结合草坪草生长速度、坪用和经济指标,综合评价了5种毯式基质草皮。结果表明:在草坪草生长速度方面,秸秆草皮的匍匐茎水平扩展速率最快,为0.71 cm/d。人工天然混合草坪成坪时间最短,为25 d。在草坪坪用和运动指标方面,5种衬质处理均显著降低了杂草数量,显著提升了草坪茎密度、草皮紧实度和抗拉强度。秸秆草皮地上生物量最高,为4.3 g/dm2。在经济指标方面,秸秆草皮成本低,生产周期短,且做到了农林剩余物的回收利用,性价比高。椰丝草皮抗拉强度高,但咬合程度低,成本较高。人工天然混合草皮综合评价最优,成坪时间最短,坪用质量佳。

跳仓法与补偿收缩混凝土组合技术在地下室工程中的应用研究

采用钙镁复合膨胀剂配制补偿收缩混凝土能够弥补跳仓法施工的混凝土存在收缩变形过大的缺陷,跳仓法与补偿收缩混凝土组合技术在工程实体结构应用中具有较好的裂缝控制效果。实体结构监测数据表明,混凝土内部早期温度修正后微应变为31με~104με,60 d龄期内缓慢降低至-153με~-48με,采用钙镁复合膨胀剂配制的补偿收缩混凝土在较长龄期内收缩量较小,开裂风险较低;不同板块收缩变形量与跳仓接壤板块数量和分块结构尺寸2个因素有关;可通过增加保温材料层数或厚度以控制早期降温速率和温降收缩量。

OLED车间蒸镀机基座替代性方案研究

国内AMOLED产品已经量产的有京东方、天马微电子、华星光电、维信诺光电、和辉光电等数家企业。在AMOLED产品生产工艺中,蒸镀机的承重基座在建厂时会花费较高的建造成本及安装时间。结合实践,论证了一种蒸镀机承重基座的替代性方案在OLED行业的可使用情况。以求蒸镀机的替代性方案能使OLED行业的建厂成本减少和建厂时间压缩,可供类似厂建借鉴参考。

基于ZnS材料的纺织基交流电致发光器件研究现状及展望

宽禁带Ⅱ-Ⅵ化合物ZnS是电致发光材料的最佳基质之一,以其掺杂物为发光材料主体的柔性交流电致发光器件具有优良的机械性能、简易的制造工艺、均匀的发光性能及较低的生产成本等特点,被视为未来极有前途的柔性显示设备,在可穿戴设备、仿生伪装、智能交互及软机器人等领域具有广阔应用前景。近年来,将交流电致发光原理与纺织技术相融合的研究策略,成为柔性发光设备领域的研究热点。本文结合近年来纤维基、织物基柔性交流电致发光器件在照明显示、信息交互、智能穿戴、视觉传感及潮流装饰等领域的研究,对发光器件的结构、发光机理、性能提升、优化方案进行了分类、综述及分析,并对柔性交流电致发光器件的未来发展进行了展望。

基于GC-O-MS技术的植物肉风味特征及像真性分析

为探究市售植物肉的风味特征及像真性,本实验采用固相微萃取法和气相色谱-嗅闻-质谱联用技术,对3类国产植物肉产品及对应种类动物肉产品的挥发性风味物质进行识别和差异分析。在植物鸡肉、植物牛肉、植物猪肉中分别定性检出30,35和30种风味活性物质。仪器测定结合相对气味活度值分析,明确构成三类植物肉的关键风味物质均以醛类物质为主,分别为庚醛(橡胶味、肉脂香)、(E)-2-辛烯醛(清香、肉脂香)、(E)-2-壬烯醛(肉脂香、咸味、酱香)、(E,E)-2,4-癸二烯醛(肉脂香)。此外,植物鸡肉组的关键风味物质还有壬醛(芹菜味)、癸醛(蒜味、酸味)和(E,E)-2,4-壬二烯醛(肉脂香、酱香);植物牛肉组的关键风味物质还有:癸醛(豆腥味、烤葱香)、乙基麦芽酚(油脂味)、甲基糠基二硫醚(焙烤香)和(E,E)-2,4-壬二烯醛(肉脂香);植物猪肉组的关键风味物质还有:(E)-2-十一烯醛(煎烤香)、(E,Z)-2,4-癸二烯醛(酱香)和2-乙酰基噻唑(生豆味)。本研究表明醛类物质是组成植物肉整体香气特征的关键呈香物质,加工过程中香辛料风味物质具有掩蔽和模拟作用,为进一步优化和增强植物肉风味特征的像真性提供了理论和数据支持。

2022年外军定位导航与授时领域发展综述

以美国为首的世界军事大国仍以提升对抗环境下的弹性定位导航授时能力作为发展目标。在系统和技术发展方面,持续推进导航卫星的升级换代和卫星导航新技术的验证,发展卫星导航拒止环境下的其他可替代PNT技术,并探索研究装备技术。在装备部署和运用方面,基于多导航源融合应用进入装备试装和能力验证。

Tunable terahertz filter based on alternative liquid crystal layers and metallic slats

We propose and demonstrate a pseudo Fabry–Pérot filter in the terahertz frequency range of 0.1–0.5 THz. It consists of alternative liquid crystal layers and metallic slats. Separate sharp resonant peaks are shown in the simulated transmission spectra, and their positions shift toward higher frequencies when the refractive index of liquid crystal decreases. The measured transmission spectra are consistent with corresponding simulations. Via thermally tuning the refractive index of the filled liquid crystal, the resonant transmission frequencies shift accordingly. The work supplies a novel design for tunable terahertz filters, which would play important roles in terahertz imaging, sensing, high speed communication, and security applications.

Evidence-based Practice Method of Integrative Chinese and Western Medicine Based on Literature Retrieval through PICO Question and Complementary and Alternative Medicine Topics

An evidence-based practice method according to literature retrieval through PICO （Patients,Intervention,Comparison,Outcome） questions and complementary and alternative medicine （CAM） topics,which can obtain helpful evidence for guiding clinical practice,was introduced with a practical example in this paper.The knowledge of diseases and Western medicine treatment can be acquired by literature retrieval through PICO question,while searching by CAM topics may provide evidence for Chinese medicine （CM）.Thus the author held that literature retrieval through both PICO question and CAM topics was an ideal evidencebased practice method for integrative Chinese and Western medicine （ICWM）.However,since the standard in CM evidence hierarchy is still under study,the value of the CAM thematic retrieval method remains very limited.In the future,studies on the definition and hierarchy of CM evidences and the herb-drug interaction between Western and Chinese medicine during a combination therapy should be strengthened to improve the status of ICWM evidence-based practice.

QUALITY CONTROL OF HERBAL MATERIAL:ALTERNATIVE AND/OR COMPLEMENTARY TOOLS BASED ON BIOSENSORS, DNA PROFILING, NEAR INFRARED SPECTROSCOPY AND NUCLEAR MAGNETIC RESONANCE

Phar.Eur.Herbal Drug(HD)monographs state which aspects have to be considered for quality assurance through the relevant chapters'Definition'.'Characters','Identification','Tests',and'Assay'.Identification of botanical material is achieved by macroscopic and microscopic morphology,generally examined by a trained expert.Content or assay is the most difficult area of

酸-碱交替沉淀法制备铜基甲醇合成催化剂

采用酸-碱交替沉淀法（AP法）制备了一种新型的低压甲醇合成催化剂. 研究了母液pH值和交替次数对催化剂性能的影响. 结果表明, pH值交替范围为5.0～9.5, 交替次数为3时制备的催化剂活性最好. 与其它制备方法相比, AP法制备的催化剂具有最高的活性和耐热性,耐热后活性保留率达88%, 比其它催化剂高8%～20%, 而且耐热后活性甚至高于其它催化剂的初活性. X射线衍射（XRD）、热重分析、低温N2吸附和扫描电子显微镜等结果表明, AP法制备的催化剂的XRD谱中铜和锌的特征峰最为宽化、弥散, CuO与ZnO 峰交织在一起,峰强度最弱;同时催化剂的粒度较小,粒径尺寸分布较均匀,结晶度相对较低;而且催化剂的还原温度最低,铜锌组分间的协同作用最强. 这表明AP法制备的催化剂具有高活性、高耐热性和易还原的主要原因是该制备方法使催化剂中的铜锌组分形成了无定形状态的铜锌固溶体,提高了活性组分的分散度和比表面积.