时间理性与学生命运——基于学校铃声的课程管理视角

铃声是时间理性在学校课程管理中影响最广的表征。学生根据作息时间表、课程表等从事的课程活动离不开铃声管理的时间理性。然而,时间理性带给学生的是一种表格化的命运,学生生活在循环式的时间里,生活无法自主。最终,学生的主体地位被时间理性所消解。为了彰显学生在课程中的主体地位,学校管理者亟须转变时间的观念,让学生享乐日常的课程生活。

时间相关决策中的非理性现象

时间相关决策中存在着时间成本模糊、时间感知不稳定和远近选择决策权重不稳定等非理性现象。心理账户因素、决策认知因素、决策情境因素和个体因素影响时间相关决策中非理性现象的产生。通过加强时间价值感知训练、理性分析和想象后悔、团队决策、制订合理时间计划和理解社会文化等方法,可减少时间相关决策中的非理性现象。研究者在未来可关注主观心理时间和高科技对时间相关决策的影响、个体时间相关决策社会化的过程、改变学科视角和实验范式进行研究等。

住院天数合理性评定3例

近年来国内医院平均住院日有所缩短,但是致力于缩短平均住院日的主要是病人密集的三甲医院或有专业特色的二甲医院,多数中小医院仍有“挂床”行为的存在。此现象增加了不必要的住院医疗费用开支,不仅人为地造成公共资源的浪费,也加重了侵权人及保险公司的赔偿责任。因而在司法鉴定中,经常遇到住院时间(天数)合理性的评定,当事人在遇到交通事故特别是故意伤害案件时,长期吃住在医院或在医院挂床,不仅浪费了大量的医疗资源,也给社会稳定、民事调解、诉讼及赔偿等方面带来诸多不利因素,可能激化社会矛盾,增加诉讼成本,破坏社会和谐稳定,当然也对司法鉴定带来了难度。法医临床鉴定的范畴中包括医疗终结时间鉴定,而“医疗终结时间鉴定”不完全等同于住院时间合理性评定。如何进行住院时间合理性评定,目前尚缺少相关临床规范,本文提出自己的一些日常做法,供各位同道参考。

化学课堂教学有效性的评价研究

依据系统科学理论,探讨了课堂教学基元系统有效性（EfPrS）的含义;运用项目分析、探索性因素分析和验证性因素分析方法,开发了EfPrS的评价量表,并得到了影响EfPrS的5个最主要因素,分别为：“时间利用的合理性（RUT）”“教学行为链的实施质量（QTBC）”“匹配度（MD）”“资源和手段的使用质量（QUR＆T）”和“基元内容的合理性（RPrC）”;运用回归分析方法建立了EfPrS与5个影响因素之间的线性回归方程,并得出QTBC是影响EfPrS的最主要因素;运用聚类分析和判别分析方法得到了课堂教学基元系统高效、中效和低效的边界值。

论叔本华哲学对王国维的影响

论叔本华哲学对王国维的影响蔡函甫叔本华是十九世纪德国著名的唯意志论者，也是一位影响深远的悲观主义哲学家；王国维则是中国近代杰出的文化巨匠，享誉中外的一代国学大师。东方佛学曾对叔本华哲学体系的形成产生了极大的启发作用，而叙本华的悲观主义人生观、美学观又...

Effect of solution treatment time on plasticity and ductile fracture of 7075 aluminum alloy sheet in hot stamping process

The effect of solution treatment time on the post-formed plasticity and ductile fracture of 7075 aluminum alloy in the hot stamping process was studied.Tensile tests were conducted on the specimens subjected to the hot stamping process with different solution treatment time.The digital image correlation(DIC)analysis was used to obtain the strain of the specimen.Based on the experiments and modeling,the Yld2000-3d yield criterion and the DF2014 ductile fracture criterion were calibrated and used to characterize the anisotropy and fracture behavior of the metal,respectively.Furthermore,the microstructure of specimens was studied.The experimental and simulation results indicate that the 7075 aluminum alloy retains distinct anisotropy after the hot stamping process,and there is no obvious effect of extending the solution treatment time on the material anisotropy.However,it is found that a longer solution treatment time can increase the fracture strain of the aluminum alloy during the hot stamping process,which may be related to the decrease of the second-phase particles size.

Robust PID controller design for time delay processes with peak of maximum sensitivity criteria

The motivation of this work is to obtain single PI/PID tuning formula for different types of processes with enhanced disturbance rejection performance. The proposed tuning formula consistently gives better performance in comparison to several well-known methods at the same degree of robustness for stable, integrating and unstable processes. For the selection of the closed-loop time constant(τc), a guideline is provided over a broad range of time-delay/time-constant ratios on the basis of the peak of maximum sensitivity(Ms). An analysis has been performed for the uncertainty margin with the different process parameters for the robust controller design. It gives the guideline of the Ms-value settings for the PI controller designs based on the process parameters uncertainty. Furthermore, a relationship has been developed between Ms-value and uncertainty margin with the different process parameters(k, τ and θ). Simulation study has been conducted for the broad class of processes and the controllers are tuned to have the same degree of robustness by measuring the maximum sensitivity, Ms, in order to obtain a reasonable comparison.

Effect of GA_(3) Concentration and Soaking Time on Seed Germination Characteristics of Blueberry

This study aims to explore the effect of GA_(3) concentration and soaking time on seed germination characteristics of blueberry.To be specific,big(B),medium-sized(M),and small(S)blueberry seeds were soaked in 0,100,200,and 300 mg/L GA_(3) solution for 18 h and 200 mg/L GA_(3) solution for 0,24,and 48 h,respectively.The results showed that 300 mg/L GA_(3) had significant effect on the germination of B and M seeds(P<0.01)and enabled the germination 4~5 d and 7~8 d earlier,respectively.Soaking with 200 mg/L GA_(3) for 24 h was conducive to the germination of B and M seeds(P<0.05).However,GA_(3) concentration and soaking time had no obviously promoting effect on the germination of S seeds.The interactions between GA_(3) concentration and seed size and between soaking time and seed size were significant(P<0.01).

An analytic solution describing the visco-elastic deformation of coal pillars in room and pillar mine

Coal pillar deformation is typically nonlinear and time-dependent. The accurate prediction of this defor- mation has a vital importance for the successful implementation of mining techniques. These methods have proven very important as a way to excavate coal resources from under buildings, railways, or water bodies. Elastic and visco-elastic theory are employed with a Maxwell model to formulate an analytic solution for displacement of coal pillars in room and pillar mine. These results show that the visco-elastic solution adequately predicts the coal pillar deformation over time. We conclude that the visco-elastic solution can predict the coal pillar and roadway displacement from the measured geological parameters of the conditions in situ. Furthermore, this method would be useful for mine design, coal pillar support optimization, ground subsidence prediction, and coal pillar stability analysis.

Effect of heat treatment on microstructures and mechanical properties of extruded-rolled AZ31 Mg alloys

The deformation behaviors of extruded-rolled(ER)AZ31 Mg alloys with different rolling reduction and heat treatment were investigated.The results show that the accumulation of rolling reduction increases the density of twins,and refines the grain structures,which are in accordance with the enhanced strength and degraded plasticity.Tensile strength and plasticity of the alloy depend mainly on rolling reduction,while heat treatment temperature plays a more important role than heat treatment time at the same rolling reduction.With the increase of rolling reduction,the plasticity becomes more sensitive than strength on heat treatment. Recrystallization of extruded-rolled alloys will occur easily with deformation increasing,which is induced by addition of distortion energy.

“遗民”陈寅恪

“遗民”陈寅恪孙郁１我在《“遗民心态”与“角色化”》一文中曾说：谈明、清以后的中国知识分子，有一种现象是很值得研究的，这便是“遗民心态”。从顾炎武、黄宗羲、王夫之，到王国维、陈寅恪，几百年间，文人多讲“气节”，有趣的故事不知流传了多少。“气节”当然可...

Pearson＇s Correlation Coefficient： A More Realistic Threshold for Applications on Autonomous Robotics

Many applications for control of autonomous platform are being developed and one important aspect is the excess of information, frequently redundant, that imposes a great computational cost in data processing. Taking into account the temporal coherence between consecutive frames, the PCC （Pearson＇s Correlation Coefficient） was proposed and applied as： discarding criteria methodology, dynamic power management solution, environment observer method which selects automatically only the regions-of-interest; and taking place in the obstacle avoidance context, as a method for collision risk estimation for vehicles in dynamic and unknown environments. Even if the PCC is a great tool to help the autonomous or semi-autonomous navigation, distortions in the imaging system, pixel noise, slight variations in the object＇s position relative to the camera, and other factors produce a false PCC threshold. Whereas there are homogeneous regions in the image, in order to obtain a more realistic Pearson＇s correlation, we propose to use some prior known environment information.

论《柳如是别传》在陈寅恪生命史上的创始意义

从陈寅恪早年心灵中凝淀下来的红豆意象，到晚年的孤愤心态以及他的几乎与生俱来的易代情结构成了《柳如是别传》这部作品的生命主题，也标志着此书在陈氏生命史上具有包括学术价值在内的不同寻常的特殊价值，从而使之成为50－80年代中国大陆史学界、学术界最具个性的作品。

Effect of Binders on Aromatization Performance of HZSM-5 Catalyst

The effect of different binders on light hydrocarbon aromatization performance of the HZSM-5 catalyst was investigated. Physicochemical properties of the catalysts, such as the specific surface area, pore volume and acidity, etc., were characterized to correlate with their aromatization performance data. The results showed that the pore structure of Al2O3 could significantly affect the catalyst performance. As the accessible pore diameter of the catalyst increased from 8.0 nm to 9.0 nm, the light aromatics yield increased by 2.7 percentage points, while the operating time of the catalyst nearly doubled. In addition, catalysts prepared with SiO2 and aluminum phosphate was more active and stable than that prepared with Al2O3, of which the light aromatics yield enhanced 6---8 percentage points and the rtm length, or seivice eife run length nearly doubled.

论孔孟儒学显示的生命真谛

人类自出现起就开始对自身的奥秘猜测、探询。尤其对于死亡的恐惧,困惑,更引发芸芸众生的痛苦、躲避、抗拒、超脱种种生活选择,而古往今来的哲人,不约而同地探索生命的真谛。孔孟儒学对中国文化影响至深,它是中华民族生命精神的内在支柱。他的魅力来自仁者、王道精神对于生命的升华,建立理性的时间意识、生命观念,牢固的伦理道德观,深刻的忧患意识,进步的民本思想,以此与现实人生的终极悲剧抗衡。

Performance evaluation on field synergy and composite regeneration by coupling cerium-based additive and microwave for a diesel particulate filter

In order to reveal the mechanics of composite regeneration by coupling cerium-based additive and microwave for a diesel particulate filter, a composite regeneration model by coupling cerium-based additive and microwave for a diesel particulate filter was established based on field synergy theory. Performance evaluation on field synergy and composite regeneration of the diesel particulate filter was conducted by using the vortex crushing combustion and field synergy mathematical models. The results show that the peak temperature of the particulate filter body reaches 1180-1190 K when the regeneration time is 175 s, and there are optimal coordination degree between the velocity vector and temperature gradient of the filter body and the maximum ratio0.56-0.60 of the best burning regeneration region is obtained. Accordingly, the largest regeneration combustion rate inside the particulate filter body and the highest regeneration efficiency at the moment are achieved.

Humanistic caring:the core of nursing

The voice of calling for humanistic concern is always from uncountable doctor-patient conflicts, from which we often hear a doctor is killed or injured for disputes. Prejudice has been rooted in mind that all doctors and nurses are interest-centered and cold-blooded. To some extent, it's true that patterned questions with a poker face are always more than gentle words with warm smile. Nurses are the ones who keep patients company for the longest time. Therefore, caring matters more for them. The explicit concept of "caring" will be introduced and we will attach great importance to how nurses can achieve caring. From the following aspects:the practices of loving kindness, the instillation of faith and hope, sensitivity to indicators of disease, improvem ent of healing environment, communication arts etc, you will understand why nurse is the symbol of angel. We can begin with caring about people around us. Our duty is not only to deal the ill but to warm the chill.

Delay-dependent robust control for uncertain discrete singular systems with time-varying delay

The design problem of delay-dependent robust control for uncertain discrete singular systems with time-varying delay is addressed in this paper. The uncertainty is assumed to be norm-bounded. By establishing a finite sum inequality based on quadratic terms, a new delay-dependent robust stability condition is derived and expressed in terms of linear matrix inequalities (LMIs). A suitable robust state feedback control law is presented, which guarantees that the resultant closed-loop system is regular, causal and stable for all admissible uncertainties. Numerical examples are given to demonstrate the applicability of the proposed method.

Tracheobronchial Polyflex stents for the management of benign refractory hypopharyngeal strictures

AIM:To describe a modified technique for placement of a tracheobronchial self-expanding plastic stent(SEPS) in patients with benign refractory hypopharyngeal strictures in order to improve dysphagia and allow stricture remodeling.METHODS:A case series of four consecutive patients with complex hypopharyngeal strictures after combinedtherapy for laryngeal cancer,previously submitted to multiple sessions of dilation without lasting improvement,is presented.All patients underwent placement of a small diameter and unflared tracheobronchial SEPS.Main outcome measurements were improvement of dysphagia and avoiding of repeated dilation.RESULTS:The modified introducer system allowed an easy and technically successful deployment of the tracheobronchial Polyflex stent through the stricture.All four patients developed complications related to stent placement.Two patients had stent migration(one proximal and one distal),two patients developed phanryngocutaneous fistulas and all patients with stents in situ for more than 8 wk had hyperplastic tissue growth at the upper end of the stent.Stricture recurrence was observed at 4 wk follow-up after stent removal in all patients CONCLUSION:Although technically feasible,placement of a tracheobronchial SEPS is associated with a high risk of complications.Small diameter stents must be kept in place for longer than 3 mo to allow adequate time for stricture remodeling.