常态化疫情防控中“隔离”措施法律适用之完善——以新冠肺炎疫情防控为视角

针对新冠肺炎疫情,我国全力抗疫并实现疫情防控的常态化,疫情防控和社会经济发展同步推进取得了伟大成就。在疫情阻击防控过程中,隔离措施至关重要。然而,从公共卫生法治化角度来看,隔离措施在理论和实践上仍存在一定的问题,其功能的发挥势必会受到一定程度的影响。因此,要精准分析新冠疫情阻击防控过程中的隔离措施,使其纳入法制化的轨道,要对相关法律法规进行不断完善和优化,构建法制化的执行程序,以有效强化公民权利的保障,全面提升依法治理能力。

“隔离”与“留置”在中小学的异化与回归

“隔离”与“留置”是中小学较为常见的惩戒方式。“隔离”与“留置”具有空间属性和教育价值。但在教师的教育惩戒实践中,出现了诸如“非教育化”与“反教育化”的趋向。因此,亟需回归“隔离”与“留置”的教育本位:尊重主体,生成共识;承担责任,积极筹划;慎用惩戒,注重关怀。

关系暗含难定断 “隔离”明言易呈现

高三专题复习教学中会出现很多解法上的困惑.文章研究剖析了-道试题的解法,明晰问题的逻辑基础,给 出相关问题的解答与点评,并从问题背景、思维历程、逻辑关系等多角度进行揭示,同时针对教学现状,结合教学实践给出 教学思考.

从高考题看英语中的“隔离”修饰

请看 NMET 2001单项选择第22小题:The film brought the hours back to me I was taken good care of inthat faraway village. A.until B.that C.when D.where 正确答案为 C.when。在此题中,when引导限定性定语从句,修饰前面的thehours,其间插入了 back to me。这就大大增加了此题的难度,干扰了考生的正常思路。这种“隔离”作为语言修饰的一个有机组成部分,是一种很常见的语言现象。这种“隔离”修饰,能使一些句子保持平衡,避免头重脚轻,从而使语言表达更加灵活。现将英语中最常见的“隔离”修饰归纳如下:

“隔离水墙+泄放钻孔”技术在治理煤壁内煤炭自燃中的应用研究

矿井巷道煤壁内煤炭氧化自燃事故的处理,常规方法是采取挖出着火点煤炭、向煤壁内注水等措施,但某矿井出现巷道煤壁内煤炭氧化自燃事故后,常规方法不仅未能有效处理,反而出现随着灭火钻孔注水范围扩大。煤炭氧化范围顺巷道向着火点两侧扩大的异常现象。针对此种异常现象,研究分析了煤炭氧化范围自着火点向两侧扩大的原因,创新地采用“隔离水墙+泄放钻孔”技术,即在着火点两侧施工注水钻孔构建“隔离水墙”,阻止着火点高温气体向周围扩散,同时在着火点范围两侧、“隔离水墙”之内,施工开口不封闭的“泄放钻孔”,构建高温气体“泄放通道”,使着火点内的高温气体从“泄放钻孔”泄出。采用“隔离水墙+泄放钻孔”技术,成功治理了煤壁内煤炭氧化自燃事故。该研究成果对类似事故的处理具有借鉴意义。

返贫“隔离墙”构建研究——以Y县为例

消除贫困是全人类的共同使命和奋斗目标,我国如期实现了全面建成小康社会的宏伟目标,但相对贫困依旧存在并将长期存在。如何在“后扶贫”时代逐渐减少相对贫困,防止脱贫人口返贫、边缘人口致贫,需要剖析导致脱贫人口返贫的可能因素,建立防返贫有效机制,完善脱贫人口后期发展扶持策略,为农村防返贫工作的开展提供支撑。

呼吸道感染下运动员备战训练的实施策略及建议

近年来呼吸道感染对运动员备战训练造成了较大的影响。本文运用文献资料、逻辑推理等研究方法,对运动员呼吸道感染下筹建“隔离训练营地”的实践操作准则,以及重返赛场身体机能评估和竞技训练实施内容等方面进行探讨论证。研究认为:筹建“隔离训练营地”的优势主要表现为杜绝病毒传播、提高训练质量、获取医疗保障;而劣势表现为可能会诱发精神疾病、束缚以赛代练、削弱竞技能力。基于此,为帮助教练员和运动员在未来面对未知的各种流行性疾病时,能够有更好的应对措施,建议:从统筹推进备战向参赛实践转化、调节心理健康唤情绪体验高涨、建立免疫机制保高效训练质量和科技助力备战促竞技能力提升等4个方面考虑筹建“隔离训练营地”的构架原则和实施策略。

Possible genetic reproductive isolation between two tilapiine genera and species:Oreochromis niloticus and Sarotherodon melanotheron

Successful crossbreeding between Oreochromis niloticus and Sarotherodon melanotheron to produce a commercial hybrid has been difficult.The karyotypes and isoenzyme of these two species and their reciprocal hybrids（O.niloticus ♀ × S.melanotheron ♂,S.melanotheron ♀ × O.niloticus ♂,the last not included in the isoenzyme study） were investigated via metaphase chromosomes obtained from head kidney cells and electropherogram of lactate dehydrogenase（LDH） isoenzymes from the liver,kidney,white muscle,heart,and eye balls.The diploid chromosome number（2n=44） and the fundamental number（NF=50） of the four tilapia genotypes were the same.However,the karyotype of O.niloticus had three pairs of sub-metacentric（sm）,twelve pairs of sub-telocentric（st）,and seven pairs of telocentric（t） chromosomes,while S.melanotheron had one pair of metacentric（m）,two pairs of sm,12 pairs of st,and seven pairs of t chromosomes.The reciprocal hybrids both showed a mixed karyotype range between their parents：0.5 pair of m,2.5 pairs of sm,12 pairs of st,and seven pairs of t chromosomes.In view of the electropherogram of isozymes,only the LDH of the kidney showed significant clear bands,with five bands in O.niloticus,three bands in S.melanotheron,and duplicated six bands in the hybrids.The bands varied depending on their activities and mobilities.We considered that the differences in karyotype and isoenzyme were related to the genetic mechanism for post-mating isolation,and provided some additional basic genetic background of their taxonomy.

Design and realization of security physical isolation system

A physical isolation system based on PCI (peripheral component interconnect),embedded with intelligence card technology, strong identity authentication technology and securityaudit, etc., is introduced. The system can physically isolate the internaland external networks. Thehardware of the system, including PCI interface control circuits, network interface circuits andlogic control circuits, is designed to automatically adapt its operation speed and mode to thenetwork and securely isolate the internal and external networks; the software of the system,including the security strategy management module, the security audit module, the database recordexchanging module, the file exchanging module and the mail exchanging module, is designed toefficiently exchange and manage the data transference between the internal and external networks.Also the driver of the system is implemented with Windows driver development kits (DDK) based onNetwork Driver Interface Specification (NDIS). The prototype ofthe system developed has beenemployed in the Police Fire Protection Bureau of Hubei Province, which performs consistently andefficiently. The technological cruxes discussed have practical values for related subjects.

Novel Substrate pn Junction Isolation for RF Integrated Inductors on Silicon

A new method for reducing the substrate rated losses of integrated spiral inductors is presented.The method is to block the eddy currents induced by spiral inductors by directly forming pn junction isolation in the Si substrate. The substrate pn junction can be realized by using the standard silicon technologies without any additional processing steps.Integrated inductors on silicon are designed and fabricated. S parameters of the inductor based equivalent circuit are investigated and the inductor parameters are calculated.The impacts of the substrate pn junction isolation on the inductor quality factor are studied.The experimental results show that substrate pn junction isolation in certain depth has achieved a significant improvement.At 3GHz,the substrate pn junction isolation increases the inductor quality factor by 40%.

Intercellular Symplastic Connection and Isolation of the Unloading Zone in Flesh of the Developing Grape Berry

The ultrastructure and intercellular connection of the sugar unloading zone (i.e. the phloem in the dorsal vascular bundle and the phloem_surrounding the assimilate sink_cells) of grape ( Vitis vinifera× V. labrusca cv. Jingchao) berry was observed via transmission electron microscopy. The results showed that during the early developmental stages of grape berry, numerous plasmodesmata were found in the phloem between sieve element (SE) and companion cell (CC), between SE/CC complexes, between SE/CC complex and phloem parenchyma cell and in between phloem parenchyma cells, which made the phloem a symplastic integration, facilitating sugar unloading from sieve elements into both companion cells and phloem parenchyma cells via a symplastic pathway. On the contrary, there was almost no plasmodesma between phloem and its surrounding flesh photoassimilate sink_cells, neither in between the flesh photoassimilate sink_cells giving rise to a symplastic isolation both between phloem and its surrounding flesh photoassimilate sink_cells, as well as among the flesh photoassimilate sink_cells. This indicated that both the sugar unloading from phloem and postphloem transport of sugars should be mainly via an apoplastic pathway. During the ripening stage, most of the plasmodesmata between SE/CC complex and the surrounding phloem parenchyma cells were shown to be blocked by the electron_opaque globules, and a phenomenon of plasmolysis was found in a number of companion cells, indicating a symplastic isolation between SE/CC complex and its surrounding parenchyma cells during this phase. The symplastic isolation between the whole phloem and its surrounding photoassimilate sink_cells during the early developmental stages shifted to a symplastic isolation within the phloem during the ripening phase, and thus the symplastic pathway of sugar unloading from SE/CC complex during the early development stages should be replaced by a dominant apoplastic unloading pathway from SE/CC complex in concordance.

Fabrication and Numerical Simulation of a MicromachinedContact Cantilever RF-MEMS Switch

This paper reports a contact cantilever MEMS switch. The designed switch has a metal cantilever that acts as an electrostatically activated switch with processing options to achieve dielectric isolation of the controlvoltage path from the signal path. To obtain good material properties,an ANSYS FEA tool is used to optimize the structure. The RF MEMS switch is fabricated via a surface micromachining process. The switch has an actuation voltage of 12V,which is close to the simulated value of 11V. The measured and the HFSS simulated isolations are both higher than - 20dB from 0.05 to 10GHz. The measured insertion loss is less than - 0.9dB, relatively larger than the simulated loss of less than - 0.2dB from 0.05 to 10GHz. This is because a contact resistance introduced due to poor physical contact between the bottom lines and the metal cantilever.

GaAs PIN Diodes for X-Band Low Loss and High Isolation Switches

GaAs PIN diodes optimized for X-band low loss and high isolation switch application are presented. The impact of diode physical characteristics and electrical parameters on switch performance is discussed. A new structure for GaAs PIN diodes is proposed and the fabrication process is described. GaAs PIN diodes with an on-state resistance of 〈2. 2Ω and off-state capacitance -〈20fF in the range of 100MHz to 12.1GHz are obtained.

EXPERIMENTAL STUDY OF FORCED SHOCK TRAIN OSCILLATION IN ISOLATOR UNDER ASYMMETRIC INCOMING FLOW

To analyze the response of the wall pressure fluctuation in an isolator when the shock train is subjected to a periodic motion at a low frequency,the isolator experiment is conducted in a blow-down supersonic wind tunnel at free stream Mach number of 1.98 under asymmetric incoming flow.Experimental results show that：The isolator effectively isolates the periodic back pressure fluctuation from affecting upstream undisturbed flow;The wall pressure fluctuations are due to the propagation of wave fronts with the second acoustic mode,but they are subjected to an oscillating shock train in the most part of the shock oscillation region;The attenuation of wall pressure fluctuations on the lower wall with thick boundary layer accords with the exponential law,but it fluctuates on the upper wall with thin boundary layer in the shock oscillation region.

Analysis on Genetic Diversity and Isolation Mechanism by Distance of Different Ecological Type Sheep Breeds in Mon-golia Sheep Group

In the present study with Tan sheep, small-tailed Han sheep, Hu sheep, Tong sheep, and Wadi sheep, we detected the distribution of gene frequency of several microsatellite sites in different chromosomes, the result showed that： 1） Hu sheep was in the status of Hardy-Weinberg extreme disequilibrium （P 〈 0.01）, while populations including Tong sheep, small-tailed Han sheep, Tan sheep, and Wadi sheep were in Hardy-Weinberg equilibrium （P 〉 0.05）. 2） Variance analysis of the heterozygosity and poly- morphic information content at rnicrosatellite makers showed that there were not significant differences among populations as to heterozygosity and PIC （P 〉 0.05）, as to effective number of alleles there were not significant differences both among Tan sheep, Hu sheep, Tong sheep, and Wadi sheep, and between Wadi sheep and small-tailed sheep （P 〉 0.05）, but between the former three populations and the latter two populations, there were significant differences （0.01〈 P 〈0.05）. The variation levels of small-tailed Han sheep was the highest in the five populations based on microsatellite maker data, subsequently followed by Wadi sheep, Tong sheep, Tan sheep, and then Hu sheep. 3） The phylogenetic relationships of the five sheep populations in this study did not meet the mechanism of isolation by distance, and the genetic differentiation relationships among five sheep populations were not closely linearly correlative with their geography distribution. Our findings supported related records in literature： The five populations originated on different time stage from the primogenitor population and communicated genetically with each other thereafter in the process of natural and artificial selection and on different ecological environment.

Modeling on Prescribed Burning Width of Fire Isolated Belt in Pinus kesiya Forest

Based on field survey and measurement, and the simulated field burning test by indoor burning bed, a multiple linear regression model was established with factors of fuel load（x1）, temperature（x2）, fuel moisture content（x3）, wind velocity（x4）, aspect（xs）, slope（x6）, forest height（x7）, propagation velocity（x8）, fire line intensity（xg） and prescribed burning width of fire isolated belt（y）. The results showed that the multivari- ate linear model was y=-12.371 ＋4.182x1 ＋0.435x2 ＋0.013x3＋0.083x4＋0.017x5＋0.916x6＋ 0.540x7, and the influences of the factors on the prescribed burning width of fire isolated belt were in the order of x6, x7, x1, x4, x3, x2, x5. This model make it easier to establish fire isolated belt by using fuel characteristics, topographic factors, meteorological factors, and forest stand factors, providing basis for the development of prescribed burning and forest management fire.

EFFECTS OF INCOMING FLOW ASYMMETRY ON SHOCK TRAIN STRUCTURES IN CONSTANT-AREA ISOLATORS

To simulate the actual flowfield at the exit of the supersonic/hypersonic inlet, a wind tunnel is designed to study the flow in the scramjet isolator under the asymmetric incoming flow. And compression fields in the isolator are investigated using wall static and pitot pressure measurements. Three incoming Mach numbers are considered as 1.5, 1.8 and 2. Results show that the increase of the asymmetry of the flow at the isolator entrance leads to the increase of the shock train length in the isolator for a given pressure ratio. Based on the analysis of the flow asymmetry effect at the isolator entrance on the shock train length, a modified correlation is proposed to calculate the length of the shock train. Predicted results of the proposed correlation are in good agreement with the experimental data.

Molecular Dynamic Simulation on the Absorbing Process of Isolating and Coating of α-olefin Drag Reducing Polymer

The absorbing process in isolating and coating process of α-olefin drag reducing polymer was studied by molecular dynamic simulation method, on basis of coating theory of α-olefin drag reducing polymer particles with polyurethane as coating material. The distributions of sodium laurate, sodium dodeeyl sulfate, and sodium dodeeyl benzene sulfonate on the surface of α-olefin drag reducing polymer particles were almost the same, but the bending degrees of them were obviously different. The bending degree of SLA molecules was greater than those of the other two surfactant molecules. Simulation results of absorbing and accumulating structure showed that, though hydrophobie properties of surfactant molecules were almost the same, water density around long chain sulfonate sodium was bigger than that around alkyl sulfate sodium. This property goes against useful absorbing and accumulating on the surface of α-olefin drag reducing polymer particles; simulation results of interactions of different surfactant and multiple hydroxyl compounds on surface of particles showed that, interactions of different surfaetant and one kind of multiple hydroxyl compound were similar to those of one kind of surfaetant and different multiple hydroxyl compounds. These two contrast types of interactions also exhibited the differences of absorbing distribution and closing degrees to surface of particles. The sequence of closing degrees was derived from simulation; control step of addition polymerization interaction in coating process was absorbing mass transfer process, so the more closed to surface of particle the multiple hydroxyl compounds were, the easier interactions With isoeyanate were. Simulation results represented the compatibility relationship between surfactant and multiple hydroxyl compounds. The isolating and coating processes of α-olefin drag reducing polymer were further understood on molecule and atom level through above simulation research, and based on the simulation, a referenced theoretical basis was provided for practical optimal selection and experimental preparation of α-olefin drag reducing polymer particles suspension isolation agent.

RF MEMS switches based on thermal actuator

A new switching circuit is presented for the application in the frequency range of 0 to 8 GHz. This switch is electro-thermally actuated and exhibits high radio frequency （RF） performance due to its lateral contact mechanism, It composes of electroplated nickel and silicon nitride as structural materials. The isolation between bias and signal ports is realized by using silicon nitride. In the case of a small deformation, the relation between the displacement of the vertex and the pre-bending angle is analyzed. The metal contact is realized by in-plane motion and sidewall connection. The switches were fabricated using the MetalMUMPs process from MEMSCAP. The RF testing results show that the switch has a low insertion loss of 0. 9 dB at 8 GHz and a high isolation of 30 dB below 8 GHz.

Design Concept for Key Parameters of Reverse Conducting GCT

Presented is design concept for key parameters o f the reverse conducting gate commutated thyristor (RC-GCT),such as the thickness and concentration of n-base region and the transparent anode region,and the wi dth of separation region between asymmetric GCT and PIN diode.A structure model of the RC-GCT is set up based on the design concept and its characteristics are analyzed.The simulation results show the design concept is reasonable.